xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp (revision 6e516c87b6d779911edde7481d8aef165b837a03)
1 //===-- Clang.cpp - Clang+LLVM ToolChain Implementations --------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Clang.h"
10 #include "AMDGPU.h"
11 #include "Arch/AArch64.h"
12 #include "Arch/ARM.h"
13 #include "Arch/CSKY.h"
14 #include "Arch/LoongArch.h"
15 #include "Arch/M68k.h"
16 #include "Arch/Mips.h"
17 #include "Arch/PPC.h"
18 #include "Arch/RISCV.h"
19 #include "Arch/Sparc.h"
20 #include "Arch/SystemZ.h"
21 #include "Arch/VE.h"
22 #include "Arch/X86.h"
23 #include "CommonArgs.h"
24 #include "Hexagon.h"
25 #include "MSP430.h"
26 #include "PS4CPU.h"
27 #include "clang/Basic/CLWarnings.h"
28 #include "clang/Basic/CharInfo.h"
29 #include "clang/Basic/CodeGenOptions.h"
30 #include "clang/Basic/HeaderInclude.h"
31 #include "clang/Basic/LangOptions.h"
32 #include "clang/Basic/MakeSupport.h"
33 #include "clang/Basic/ObjCRuntime.h"
34 #include "clang/Basic/Version.h"
35 #include "clang/Config/config.h"
36 #include "clang/Driver/Action.h"
37 #include "clang/Driver/Distro.h"
38 #include "clang/Driver/DriverDiagnostic.h"
39 #include "clang/Driver/InputInfo.h"
40 #include "clang/Driver/Options.h"
41 #include "clang/Driver/SanitizerArgs.h"
42 #include "clang/Driver/Types.h"
43 #include "clang/Driver/XRayArgs.h"
44 #include "llvm/ADT/SmallSet.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/BinaryFormat/Magic.h"
47 #include "llvm/Config/llvm-config.h"
48 #include "llvm/Frontend/Debug/Options.h"
49 #include "llvm/Object/ObjectFile.h"
50 #include "llvm/Option/ArgList.h"
51 #include "llvm/Support/CodeGen.h"
52 #include "llvm/Support/Compiler.h"
53 #include "llvm/Support/Compression.h"
54 #include "llvm/Support/Error.h"
55 #include "llvm/Support/FileSystem.h"
56 #include "llvm/Support/Path.h"
57 #include "llvm/Support/Process.h"
58 #include "llvm/Support/YAMLParser.h"
59 #include "llvm/TargetParser/AArch64TargetParser.h"
60 #include "llvm/TargetParser/ARMTargetParserCommon.h"
61 #include "llvm/TargetParser/Host.h"
62 #include "llvm/TargetParser/LoongArchTargetParser.h"
63 #include "llvm/TargetParser/RISCVISAInfo.h"
64 #include "llvm/TargetParser/RISCVTargetParser.h"
65 #include <cctype>
66 
67 using namespace clang::driver;
68 using namespace clang::driver::tools;
69 using namespace clang;
70 using namespace llvm::opt;
71 
CheckPreprocessingOptions(const Driver & D,const ArgList & Args)72 static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) {
73   if (Arg *A = Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC,
74                                options::OPT_fminimize_whitespace,
75                                options::OPT_fno_minimize_whitespace,
76                                options::OPT_fkeep_system_includes,
77                                options::OPT_fno_keep_system_includes)) {
78     if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) &&
79         !Args.hasArg(options::OPT__SLASH_EP) && !D.CCCIsCPP()) {
80       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
81           << A->getBaseArg().getAsString(Args)
82           << (D.IsCLMode() ? "/E, /P or /EP" : "-E");
83     }
84   }
85 }
86 
CheckCodeGenerationOptions(const Driver & D,const ArgList & Args)87 static void CheckCodeGenerationOptions(const Driver &D, const ArgList &Args) {
88   // In gcc, only ARM checks this, but it seems reasonable to check universally.
89   if (Args.hasArg(options::OPT_static))
90     if (const Arg *A =
91             Args.getLastArg(options::OPT_dynamic, options::OPT_mdynamic_no_pic))
92       D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args)
93                                                       << "-static";
94 }
95 
96 // Add backslashes to escape spaces and other backslashes.
97 // This is used for the space-separated argument list specified with
98 // the -dwarf-debug-flags option.
EscapeSpacesAndBackslashes(const char * Arg,SmallVectorImpl<char> & Res)99 static void EscapeSpacesAndBackslashes(const char *Arg,
100                                        SmallVectorImpl<char> &Res) {
101   for (; *Arg; ++Arg) {
102     switch (*Arg) {
103     default:
104       break;
105     case ' ':
106     case '\\':
107       Res.push_back('\\');
108       break;
109     }
110     Res.push_back(*Arg);
111   }
112 }
113 
114 /// Apply \a Work on the current tool chain \a RegularToolChain and any other
115 /// offloading tool chain that is associated with the current action \a JA.
116 static void
forAllAssociatedToolChains(Compilation & C,const JobAction & JA,const ToolChain & RegularToolChain,llvm::function_ref<void (const ToolChain &)> Work)117 forAllAssociatedToolChains(Compilation &C, const JobAction &JA,
118                            const ToolChain &RegularToolChain,
119                            llvm::function_ref<void(const ToolChain &)> Work) {
120   // Apply Work on the current/regular tool chain.
121   Work(RegularToolChain);
122 
123   // Apply Work on all the offloading tool chains associated with the current
124   // action.
125   if (JA.isHostOffloading(Action::OFK_Cuda))
126     Work(*C.getSingleOffloadToolChain<Action::OFK_Cuda>());
127   else if (JA.isDeviceOffloading(Action::OFK_Cuda))
128     Work(*C.getSingleOffloadToolChain<Action::OFK_Host>());
129   else if (JA.isHostOffloading(Action::OFK_HIP))
130     Work(*C.getSingleOffloadToolChain<Action::OFK_HIP>());
131   else if (JA.isDeviceOffloading(Action::OFK_HIP))
132     Work(*C.getSingleOffloadToolChain<Action::OFK_Host>());
133 
134   if (JA.isHostOffloading(Action::OFK_OpenMP)) {
135     auto TCs = C.getOffloadToolChains<Action::OFK_OpenMP>();
136     for (auto II = TCs.first, IE = TCs.second; II != IE; ++II)
137       Work(*II->second);
138   } else if (JA.isDeviceOffloading(Action::OFK_OpenMP))
139     Work(*C.getSingleOffloadToolChain<Action::OFK_Host>());
140 
141   //
142   // TODO: Add support for other offloading programming models here.
143   //
144 }
145 
146 /// This is a helper function for validating the optional refinement step
147 /// parameter in reciprocal argument strings. Return false if there is an error
148 /// parsing the refinement step. Otherwise, return true and set the Position
149 /// of the refinement step in the input string.
getRefinementStep(StringRef In,const Driver & D,const Arg & A,size_t & Position)150 static bool getRefinementStep(StringRef In, const Driver &D,
151                               const Arg &A, size_t &Position) {
152   const char RefinementStepToken = ':';
153   Position = In.find(RefinementStepToken);
154   if (Position != StringRef::npos) {
155     StringRef Option = A.getOption().getName();
156     StringRef RefStep = In.substr(Position + 1);
157     // Allow exactly one numeric character for the additional refinement
158     // step parameter. This is reasonable for all currently-supported
159     // operations and architectures because we would expect that a larger value
160     // of refinement steps would cause the estimate "optimization" to
161     // under-perform the native operation. Also, if the estimate does not
162     // converge quickly, it probably will not ever converge, so further
163     // refinement steps will not produce a better answer.
164     if (RefStep.size() != 1) {
165       D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
166       return false;
167     }
168     char RefStepChar = RefStep[0];
169     if (RefStepChar < '0' || RefStepChar > '9') {
170       D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
171       return false;
172     }
173   }
174   return true;
175 }
176 
177 /// The -mrecip flag requires processing of many optional parameters.
ParseMRecip(const Driver & D,const ArgList & Args,ArgStringList & OutStrings)178 static void ParseMRecip(const Driver &D, const ArgList &Args,
179                         ArgStringList &OutStrings) {
180   StringRef DisabledPrefixIn = "!";
181   StringRef DisabledPrefixOut = "!";
182   StringRef EnabledPrefixOut = "";
183   StringRef Out = "-mrecip=";
184 
185   Arg *A = Args.getLastArg(options::OPT_mrecip, options::OPT_mrecip_EQ);
186   if (!A)
187     return;
188 
189   unsigned NumOptions = A->getNumValues();
190   if (NumOptions == 0) {
191     // No option is the same as "all".
192     OutStrings.push_back(Args.MakeArgString(Out + "all"));
193     return;
194   }
195 
196   // Pass through "all", "none", or "default" with an optional refinement step.
197   if (NumOptions == 1) {
198     StringRef Val = A->getValue(0);
199     size_t RefStepLoc;
200     if (!getRefinementStep(Val, D, *A, RefStepLoc))
201       return;
202     StringRef ValBase = Val.slice(0, RefStepLoc);
203     if (ValBase == "all" || ValBase == "none" || ValBase == "default") {
204       OutStrings.push_back(Args.MakeArgString(Out + Val));
205       return;
206     }
207   }
208 
209   // Each reciprocal type may be enabled or disabled individually.
210   // Check each input value for validity, concatenate them all back together,
211   // and pass through.
212 
213   llvm::StringMap<bool> OptionStrings;
214   OptionStrings.insert(std::make_pair("divd", false));
215   OptionStrings.insert(std::make_pair("divf", false));
216   OptionStrings.insert(std::make_pair("divh", false));
217   OptionStrings.insert(std::make_pair("vec-divd", false));
218   OptionStrings.insert(std::make_pair("vec-divf", false));
219   OptionStrings.insert(std::make_pair("vec-divh", false));
220   OptionStrings.insert(std::make_pair("sqrtd", false));
221   OptionStrings.insert(std::make_pair("sqrtf", false));
222   OptionStrings.insert(std::make_pair("sqrth", false));
223   OptionStrings.insert(std::make_pair("vec-sqrtd", false));
224   OptionStrings.insert(std::make_pair("vec-sqrtf", false));
225   OptionStrings.insert(std::make_pair("vec-sqrth", false));
226 
227   for (unsigned i = 0; i != NumOptions; ++i) {
228     StringRef Val = A->getValue(i);
229 
230     bool IsDisabled = Val.starts_with(DisabledPrefixIn);
231     // Ignore the disablement token for string matching.
232     if (IsDisabled)
233       Val = Val.substr(1);
234 
235     size_t RefStep;
236     if (!getRefinementStep(Val, D, *A, RefStep))
237       return;
238 
239     StringRef ValBase = Val.slice(0, RefStep);
240     llvm::StringMap<bool>::iterator OptionIter = OptionStrings.find(ValBase);
241     if (OptionIter == OptionStrings.end()) {
242       // Try again specifying float suffix.
243       OptionIter = OptionStrings.find(ValBase.str() + 'f');
244       if (OptionIter == OptionStrings.end()) {
245         // The input name did not match any known option string.
246         D.Diag(diag::err_drv_unknown_argument) << Val;
247         return;
248       }
249       // The option was specified without a half or float or double suffix.
250       // Make sure that the double or half entry was not already specified.
251       // The float entry will be checked below.
252       if (OptionStrings[ValBase.str() + 'd'] ||
253           OptionStrings[ValBase.str() + 'h']) {
254         D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
255         return;
256       }
257     }
258 
259     if (OptionIter->second == true) {
260       // Duplicate option specified.
261       D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
262       return;
263     }
264 
265     // Mark the matched option as found. Do not allow duplicate specifiers.
266     OptionIter->second = true;
267 
268     // If the precision was not specified, also mark the double and half entry
269     // as found.
270     if (ValBase.back() != 'f' && ValBase.back() != 'd' && ValBase.back() != 'h') {
271       OptionStrings[ValBase.str() + 'd'] = true;
272       OptionStrings[ValBase.str() + 'h'] = true;
273     }
274 
275     // Build the output string.
276     StringRef Prefix = IsDisabled ? DisabledPrefixOut : EnabledPrefixOut;
277     Out = Args.MakeArgString(Out + Prefix + Val);
278     if (i != NumOptions - 1)
279       Out = Args.MakeArgString(Out + ",");
280   }
281 
282   OutStrings.push_back(Args.MakeArgString(Out));
283 }
284 
285 /// The -mprefer-vector-width option accepts either a positive integer
286 /// or the string "none".
ParseMPreferVectorWidth(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs)287 static void ParseMPreferVectorWidth(const Driver &D, const ArgList &Args,
288                                     ArgStringList &CmdArgs) {
289   Arg *A = Args.getLastArg(options::OPT_mprefer_vector_width_EQ);
290   if (!A)
291     return;
292 
293   StringRef Value = A->getValue();
294   if (Value == "none") {
295     CmdArgs.push_back("-mprefer-vector-width=none");
296   } else {
297     unsigned Width;
298     if (Value.getAsInteger(10, Width)) {
299       D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Value;
300       return;
301     }
302     CmdArgs.push_back(Args.MakeArgString("-mprefer-vector-width=" + Value));
303   }
304 }
305 
306 static bool
shouldUseExceptionTablesForObjCExceptions(const ObjCRuntime & runtime,const llvm::Triple & Triple)307 shouldUseExceptionTablesForObjCExceptions(const ObjCRuntime &runtime,
308                                           const llvm::Triple &Triple) {
309   // We use the zero-cost exception tables for Objective-C if the non-fragile
310   // ABI is enabled or when compiling for x86_64 and ARM on Snow Leopard and
311   // later.
312   if (runtime.isNonFragile())
313     return true;
314 
315   if (!Triple.isMacOSX())
316     return false;
317 
318   return (!Triple.isMacOSXVersionLT(10, 5) &&
319           (Triple.getArch() == llvm::Triple::x86_64 ||
320            Triple.getArch() == llvm::Triple::arm));
321 }
322 
323 /// Adds exception related arguments to the driver command arguments. There's a
324 /// main flag, -fexceptions and also language specific flags to enable/disable
325 /// C++ and Objective-C exceptions. This makes it possible to for example
326 /// disable C++ exceptions but enable Objective-C exceptions.
addExceptionArgs(const ArgList & Args,types::ID InputType,const ToolChain & TC,bool KernelOrKext,const ObjCRuntime & objcRuntime,ArgStringList & CmdArgs)327 static bool addExceptionArgs(const ArgList &Args, types::ID InputType,
328                              const ToolChain &TC, bool KernelOrKext,
329                              const ObjCRuntime &objcRuntime,
330                              ArgStringList &CmdArgs) {
331   const llvm::Triple &Triple = TC.getTriple();
332 
333   if (KernelOrKext) {
334     // -mkernel and -fapple-kext imply no exceptions, so claim exception related
335     // arguments now to avoid warnings about unused arguments.
336     Args.ClaimAllArgs(options::OPT_fexceptions);
337     Args.ClaimAllArgs(options::OPT_fno_exceptions);
338     Args.ClaimAllArgs(options::OPT_fobjc_exceptions);
339     Args.ClaimAllArgs(options::OPT_fno_objc_exceptions);
340     Args.ClaimAllArgs(options::OPT_fcxx_exceptions);
341     Args.ClaimAllArgs(options::OPT_fno_cxx_exceptions);
342     Args.ClaimAllArgs(options::OPT_fasync_exceptions);
343     Args.ClaimAllArgs(options::OPT_fno_async_exceptions);
344     return false;
345   }
346 
347   // See if the user explicitly enabled exceptions.
348   bool EH = Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions,
349                          false);
350 
351   // Async exceptions are Windows MSVC only.
352   if (Triple.isWindowsMSVCEnvironment()) {
353     bool EHa = Args.hasFlag(options::OPT_fasync_exceptions,
354                             options::OPT_fno_async_exceptions, false);
355     if (EHa) {
356       CmdArgs.push_back("-fasync-exceptions");
357       EH = true;
358     }
359   }
360 
361   // Obj-C exceptions are enabled by default, regardless of -fexceptions. This
362   // is not necessarily sensible, but follows GCC.
363   if (types::isObjC(InputType) &&
364       Args.hasFlag(options::OPT_fobjc_exceptions,
365                    options::OPT_fno_objc_exceptions, true)) {
366     CmdArgs.push_back("-fobjc-exceptions");
367 
368     EH |= shouldUseExceptionTablesForObjCExceptions(objcRuntime, Triple);
369   }
370 
371   if (types::isCXX(InputType)) {
372     // Disable C++ EH by default on XCore and PS4/PS5.
373     bool CXXExceptionsEnabled = Triple.getArch() != llvm::Triple::xcore &&
374                                 !Triple.isPS() && !Triple.isDriverKit();
375     Arg *ExceptionArg = Args.getLastArg(
376         options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions,
377         options::OPT_fexceptions, options::OPT_fno_exceptions);
378     if (ExceptionArg)
379       CXXExceptionsEnabled =
380           ExceptionArg->getOption().matches(options::OPT_fcxx_exceptions) ||
381           ExceptionArg->getOption().matches(options::OPT_fexceptions);
382 
383     if (CXXExceptionsEnabled) {
384       CmdArgs.push_back("-fcxx-exceptions");
385 
386       EH = true;
387     }
388   }
389 
390   // OPT_fignore_exceptions means exception could still be thrown,
391   // but no clean up or catch would happen in current module.
392   // So we do not set EH to false.
393   Args.AddLastArg(CmdArgs, options::OPT_fignore_exceptions);
394 
395   Args.addOptInFlag(CmdArgs, options::OPT_fassume_nothrow_exception_dtor,
396                     options::OPT_fno_assume_nothrow_exception_dtor);
397 
398   if (EH)
399     CmdArgs.push_back("-fexceptions");
400   return EH;
401 }
402 
ShouldEnableAutolink(const ArgList & Args,const ToolChain & TC,const JobAction & JA)403 static bool ShouldEnableAutolink(const ArgList &Args, const ToolChain &TC,
404                                  const JobAction &JA) {
405   bool Default = true;
406   if (TC.getTriple().isOSDarwin()) {
407     // The native darwin assembler doesn't support the linker_option directives,
408     // so we disable them if we think the .s file will be passed to it.
409     Default = TC.useIntegratedAs();
410   }
411   // The linker_option directives are intended for host compilation.
412   if (JA.isDeviceOffloading(Action::OFK_Cuda) ||
413       JA.isDeviceOffloading(Action::OFK_HIP))
414     Default = false;
415   return Args.hasFlag(options::OPT_fautolink, options::OPT_fno_autolink,
416                       Default);
417 }
418 
419 /// Add a CC1 option to specify the debug compilation directory.
addDebugCompDirArg(const ArgList & Args,ArgStringList & CmdArgs,const llvm::vfs::FileSystem & VFS)420 static const char *addDebugCompDirArg(const ArgList &Args,
421                                       ArgStringList &CmdArgs,
422                                       const llvm::vfs::FileSystem &VFS) {
423   if (Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ,
424                                options::OPT_fdebug_compilation_dir_EQ)) {
425     if (A->getOption().matches(options::OPT_ffile_compilation_dir_EQ))
426       CmdArgs.push_back(Args.MakeArgString(Twine("-fdebug-compilation-dir=") +
427                                            A->getValue()));
428     else
429       A->render(Args, CmdArgs);
430   } else if (llvm::ErrorOr<std::string> CWD =
431                  VFS.getCurrentWorkingDirectory()) {
432     CmdArgs.push_back(Args.MakeArgString("-fdebug-compilation-dir=" + *CWD));
433   }
434   StringRef Path(CmdArgs.back());
435   return Path.substr(Path.find('=') + 1).data();
436 }
437 
addDebugObjectName(const ArgList & Args,ArgStringList & CmdArgs,const char * DebugCompilationDir,const char * OutputFileName)438 static void addDebugObjectName(const ArgList &Args, ArgStringList &CmdArgs,
439                                const char *DebugCompilationDir,
440                                const char *OutputFileName) {
441   // No need to generate a value for -object-file-name if it was provided.
442   for (auto *Arg : Args.filtered(options::OPT_Xclang))
443     if (StringRef(Arg->getValue()).starts_with("-object-file-name"))
444       return;
445 
446   if (Args.hasArg(options::OPT_object_file_name_EQ))
447     return;
448 
449   SmallString<128> ObjFileNameForDebug(OutputFileName);
450   if (ObjFileNameForDebug != "-" &&
451       !llvm::sys::path::is_absolute(ObjFileNameForDebug) &&
452       (!DebugCompilationDir ||
453        llvm::sys::path::is_absolute(DebugCompilationDir))) {
454     // Make the path absolute in the debug infos like MSVC does.
455     llvm::sys::fs::make_absolute(ObjFileNameForDebug);
456   }
457   // If the object file name is a relative path, then always use Windows
458   // backslash style as -object-file-name is used for embedding object file path
459   // in codeview and it can only be generated when targeting on Windows.
460   // Otherwise, just use native absolute path.
461   llvm::sys::path::Style Style =
462       llvm::sys::path::is_absolute(ObjFileNameForDebug)
463           ? llvm::sys::path::Style::native
464           : llvm::sys::path::Style::windows_backslash;
465   llvm::sys::path::remove_dots(ObjFileNameForDebug, /*remove_dot_dot=*/true,
466                                Style);
467   CmdArgs.push_back(
468       Args.MakeArgString(Twine("-object-file-name=") + ObjFileNameForDebug));
469 }
470 
471 /// Add a CC1 and CC1AS option to specify the debug file path prefix map.
addDebugPrefixMapArg(const Driver & D,const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs)472 static void addDebugPrefixMapArg(const Driver &D, const ToolChain &TC,
473                                  const ArgList &Args, ArgStringList &CmdArgs) {
474   auto AddOneArg = [&](StringRef Map, StringRef Name) {
475     if (!Map.contains('='))
476       D.Diag(diag::err_drv_invalid_argument_to_option) << Map << Name;
477     else
478       CmdArgs.push_back(Args.MakeArgString("-fdebug-prefix-map=" + Map));
479   };
480 
481   for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
482                                     options::OPT_fdebug_prefix_map_EQ)) {
483     AddOneArg(A->getValue(), A->getOption().getName());
484     A->claim();
485   }
486   std::string GlobalRemapEntry = TC.GetGlobalDebugPathRemapping();
487   if (GlobalRemapEntry.empty())
488     return;
489   AddOneArg(GlobalRemapEntry, "environment");
490 }
491 
492 /// Add a CC1 and CC1AS option to specify the macro file path prefix map.
addMacroPrefixMapArg(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs)493 static void addMacroPrefixMapArg(const Driver &D, const ArgList &Args,
494                                  ArgStringList &CmdArgs) {
495   for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
496                                     options::OPT_fmacro_prefix_map_EQ)) {
497     StringRef Map = A->getValue();
498     if (!Map.contains('='))
499       D.Diag(diag::err_drv_invalid_argument_to_option)
500           << Map << A->getOption().getName();
501     else
502       CmdArgs.push_back(Args.MakeArgString("-fmacro-prefix-map=" + Map));
503     A->claim();
504   }
505 }
506 
507 /// Add a CC1 and CC1AS option to specify the coverage file path prefix map.
addCoveragePrefixMapArg(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs)508 static void addCoveragePrefixMapArg(const Driver &D, const ArgList &Args,
509                                    ArgStringList &CmdArgs) {
510   for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
511                                     options::OPT_fcoverage_prefix_map_EQ)) {
512     StringRef Map = A->getValue();
513     if (!Map.contains('='))
514       D.Diag(diag::err_drv_invalid_argument_to_option)
515           << Map << A->getOption().getName();
516     else
517       CmdArgs.push_back(Args.MakeArgString("-fcoverage-prefix-map=" + Map));
518     A->claim();
519   }
520 }
521 
522 /// Vectorize at all optimization levels greater than 1 except for -Oz.
523 /// For -Oz the loop vectorizer is disabled, while the slp vectorizer is
524 /// enabled.
shouldEnableVectorizerAtOLevel(const ArgList & Args,bool isSlpVec)525 static bool shouldEnableVectorizerAtOLevel(const ArgList &Args, bool isSlpVec) {
526   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
527     if (A->getOption().matches(options::OPT_O4) ||
528         A->getOption().matches(options::OPT_Ofast))
529       return true;
530 
531     if (A->getOption().matches(options::OPT_O0))
532       return false;
533 
534     assert(A->getOption().matches(options::OPT_O) && "Must have a -O flag");
535 
536     // Vectorize -Os.
537     StringRef S(A->getValue());
538     if (S == "s")
539       return true;
540 
541     // Don't vectorize -Oz, unless it's the slp vectorizer.
542     if (S == "z")
543       return isSlpVec;
544 
545     unsigned OptLevel = 0;
546     if (S.getAsInteger(10, OptLevel))
547       return false;
548 
549     return OptLevel > 1;
550   }
551 
552   return false;
553 }
554 
555 /// Add -x lang to \p CmdArgs for \p Input.
addDashXForInput(const ArgList & Args,const InputInfo & Input,ArgStringList & CmdArgs)556 static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
557                              ArgStringList &CmdArgs) {
558   // When using -verify-pch, we don't want to provide the type
559   // 'precompiled-header' if it was inferred from the file extension
560   if (Args.hasArg(options::OPT_verify_pch) && Input.getType() == types::TY_PCH)
561     return;
562 
563   CmdArgs.push_back("-x");
564   if (Args.hasArg(options::OPT_rewrite_objc))
565     CmdArgs.push_back(types::getTypeName(types::TY_PP_ObjCXX));
566   else {
567     // Map the driver type to the frontend type. This is mostly an identity
568     // mapping, except that the distinction between module interface units
569     // and other source files does not exist at the frontend layer.
570     const char *ClangType;
571     switch (Input.getType()) {
572     case types::TY_CXXModule:
573       ClangType = "c++";
574       break;
575     case types::TY_PP_CXXModule:
576       ClangType = "c++-cpp-output";
577       break;
578     default:
579       ClangType = types::getTypeName(Input.getType());
580       break;
581     }
582     CmdArgs.push_back(ClangType);
583   }
584 }
585 
addPGOAndCoverageFlags(const ToolChain & TC,Compilation & C,const JobAction & JA,const InputInfo & Output,const ArgList & Args,SanitizerArgs & SanArgs,ArgStringList & CmdArgs)586 static void addPGOAndCoverageFlags(const ToolChain &TC, Compilation &C,
587                                    const JobAction &JA, const InputInfo &Output,
588                                    const ArgList &Args, SanitizerArgs &SanArgs,
589                                    ArgStringList &CmdArgs) {
590   const Driver &D = TC.getDriver();
591   auto *PGOGenerateArg = Args.getLastArg(options::OPT_fprofile_generate,
592                                          options::OPT_fprofile_generate_EQ,
593                                          options::OPT_fno_profile_generate);
594   if (PGOGenerateArg &&
595       PGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
596     PGOGenerateArg = nullptr;
597 
598   auto *CSPGOGenerateArg = getLastCSProfileGenerateArg(Args);
599 
600   auto *ProfileGenerateArg = Args.getLastArg(
601       options::OPT_fprofile_instr_generate,
602       options::OPT_fprofile_instr_generate_EQ,
603       options::OPT_fno_profile_instr_generate);
604   if (ProfileGenerateArg &&
605       ProfileGenerateArg->getOption().matches(
606           options::OPT_fno_profile_instr_generate))
607     ProfileGenerateArg = nullptr;
608 
609   if (PGOGenerateArg && ProfileGenerateArg)
610     D.Diag(diag::err_drv_argument_not_allowed_with)
611         << PGOGenerateArg->getSpelling() << ProfileGenerateArg->getSpelling();
612 
613   auto *ProfileUseArg = getLastProfileUseArg(Args);
614 
615   if (PGOGenerateArg && ProfileUseArg)
616     D.Diag(diag::err_drv_argument_not_allowed_with)
617         << ProfileUseArg->getSpelling() << PGOGenerateArg->getSpelling();
618 
619   if (ProfileGenerateArg && ProfileUseArg)
620     D.Diag(diag::err_drv_argument_not_allowed_with)
621         << ProfileGenerateArg->getSpelling() << ProfileUseArg->getSpelling();
622 
623   if (CSPGOGenerateArg && PGOGenerateArg) {
624     D.Diag(diag::err_drv_argument_not_allowed_with)
625         << CSPGOGenerateArg->getSpelling() << PGOGenerateArg->getSpelling();
626     PGOGenerateArg = nullptr;
627   }
628 
629   if (TC.getTriple().isOSAIX()) {
630     if (Arg *ProfileSampleUseArg = getLastProfileSampleUseArg(Args))
631       D.Diag(diag::err_drv_unsupported_opt_for_target)
632           << ProfileSampleUseArg->getSpelling() << TC.getTriple().str();
633   }
634 
635   if (ProfileGenerateArg) {
636     if (ProfileGenerateArg->getOption().matches(
637             options::OPT_fprofile_instr_generate_EQ))
638       CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-instrument-path=") +
639                                            ProfileGenerateArg->getValue()));
640     // The default is to use Clang Instrumentation.
641     CmdArgs.push_back("-fprofile-instrument=clang");
642     if (TC.getTriple().isWindowsMSVCEnvironment() &&
643         Args.hasFlag(options::OPT_frtlib_defaultlib,
644                      options::OPT_fno_rtlib_defaultlib, true)) {
645       // Add dependent lib for clang_rt.profile
646       CmdArgs.push_back(Args.MakeArgString(
647           "--dependent-lib=" + TC.getCompilerRTBasename(Args, "profile")));
648     }
649   }
650 
651   Arg *PGOGenArg = nullptr;
652   if (PGOGenerateArg) {
653     assert(!CSPGOGenerateArg);
654     PGOGenArg = PGOGenerateArg;
655     CmdArgs.push_back("-fprofile-instrument=llvm");
656   }
657   if (CSPGOGenerateArg) {
658     assert(!PGOGenerateArg);
659     PGOGenArg = CSPGOGenerateArg;
660     CmdArgs.push_back("-fprofile-instrument=csllvm");
661   }
662   if (PGOGenArg) {
663     if (TC.getTriple().isWindowsMSVCEnvironment() &&
664         Args.hasFlag(options::OPT_frtlib_defaultlib,
665                      options::OPT_fno_rtlib_defaultlib, true)) {
666       // Add dependent lib for clang_rt.profile
667       CmdArgs.push_back(Args.MakeArgString(
668           "--dependent-lib=" + TC.getCompilerRTBasename(Args, "profile")));
669     }
670     if (PGOGenArg->getOption().matches(
671             PGOGenerateArg ? options::OPT_fprofile_generate_EQ
672                            : options::OPT_fcs_profile_generate_EQ)) {
673       SmallString<128> Path(PGOGenArg->getValue());
674       llvm::sys::path::append(Path, "default_%m.profraw");
675       CmdArgs.push_back(
676           Args.MakeArgString(Twine("-fprofile-instrument-path=") + Path));
677     }
678   }
679 
680   if (ProfileUseArg) {
681     if (ProfileUseArg->getOption().matches(options::OPT_fprofile_instr_use_EQ))
682       CmdArgs.push_back(Args.MakeArgString(
683           Twine("-fprofile-instrument-use-path=") + ProfileUseArg->getValue()));
684     else if ((ProfileUseArg->getOption().matches(
685                   options::OPT_fprofile_use_EQ) ||
686               ProfileUseArg->getOption().matches(
687                   options::OPT_fprofile_instr_use))) {
688       SmallString<128> Path(
689           ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
690       if (Path.empty() || llvm::sys::fs::is_directory(Path))
691         llvm::sys::path::append(Path, "default.profdata");
692       CmdArgs.push_back(
693           Args.MakeArgString(Twine("-fprofile-instrument-use-path=") + Path));
694     }
695   }
696 
697   bool EmitCovNotes = Args.hasFlag(options::OPT_ftest_coverage,
698                                    options::OPT_fno_test_coverage, false) ||
699                       Args.hasArg(options::OPT_coverage);
700   bool EmitCovData = TC.needsGCovInstrumentation(Args);
701 
702   if (Args.hasFlag(options::OPT_fcoverage_mapping,
703                    options::OPT_fno_coverage_mapping, false)) {
704     if (!ProfileGenerateArg)
705       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
706           << "-fcoverage-mapping"
707           << "-fprofile-instr-generate";
708 
709     CmdArgs.push_back("-fcoverage-mapping");
710   }
711 
712   if (Args.hasFlag(options::OPT_fmcdc_coverage, options::OPT_fno_mcdc_coverage,
713                    false)) {
714     if (!Args.hasFlag(options::OPT_fcoverage_mapping,
715                       options::OPT_fno_coverage_mapping, false))
716       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
717           << "-fcoverage-mcdc"
718           << "-fcoverage-mapping";
719 
720     CmdArgs.push_back("-fcoverage-mcdc");
721   }
722 
723   if (Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ,
724                                options::OPT_fcoverage_compilation_dir_EQ)) {
725     if (A->getOption().matches(options::OPT_ffile_compilation_dir_EQ))
726       CmdArgs.push_back(Args.MakeArgString(
727           Twine("-fcoverage-compilation-dir=") + A->getValue()));
728     else
729       A->render(Args, CmdArgs);
730   } else if (llvm::ErrorOr<std::string> CWD =
731                  D.getVFS().getCurrentWorkingDirectory()) {
732     CmdArgs.push_back(Args.MakeArgString("-fcoverage-compilation-dir=" + *CWD));
733   }
734 
735   if (Args.hasArg(options::OPT_fprofile_exclude_files_EQ)) {
736     auto *Arg = Args.getLastArg(options::OPT_fprofile_exclude_files_EQ);
737     if (!Args.hasArg(options::OPT_coverage))
738       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
739           << "-fprofile-exclude-files="
740           << "--coverage";
741 
742     StringRef v = Arg->getValue();
743     CmdArgs.push_back(
744         Args.MakeArgString(Twine("-fprofile-exclude-files=" + v)));
745   }
746 
747   if (Args.hasArg(options::OPT_fprofile_filter_files_EQ)) {
748     auto *Arg = Args.getLastArg(options::OPT_fprofile_filter_files_EQ);
749     if (!Args.hasArg(options::OPT_coverage))
750       D.Diag(clang::diag::err_drv_argument_only_allowed_with)
751           << "-fprofile-filter-files="
752           << "--coverage";
753 
754     StringRef v = Arg->getValue();
755     CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-filter-files=" + v)));
756   }
757 
758   if (const auto *A = Args.getLastArg(options::OPT_fprofile_update_EQ)) {
759     StringRef Val = A->getValue();
760     if (Val == "atomic" || Val == "prefer-atomic")
761       CmdArgs.push_back("-fprofile-update=atomic");
762     else if (Val != "single")
763       D.Diag(diag::err_drv_unsupported_option_argument)
764           << A->getSpelling() << Val;
765   }
766 
767   int FunctionGroups = 1;
768   int SelectedFunctionGroup = 0;
769   if (const auto *A = Args.getLastArg(options::OPT_fprofile_function_groups)) {
770     StringRef Val = A->getValue();
771     if (Val.getAsInteger(0, FunctionGroups) || FunctionGroups < 1)
772       D.Diag(diag::err_drv_invalid_int_value) << A->getAsString(Args) << Val;
773   }
774   if (const auto *A =
775           Args.getLastArg(options::OPT_fprofile_selected_function_group)) {
776     StringRef Val = A->getValue();
777     if (Val.getAsInteger(0, SelectedFunctionGroup) ||
778         SelectedFunctionGroup < 0 || SelectedFunctionGroup >= FunctionGroups)
779       D.Diag(diag::err_drv_invalid_int_value) << A->getAsString(Args) << Val;
780   }
781   if (FunctionGroups != 1)
782     CmdArgs.push_back(Args.MakeArgString("-fprofile-function-groups=" +
783                                          Twine(FunctionGroups)));
784   if (SelectedFunctionGroup != 0)
785     CmdArgs.push_back(Args.MakeArgString("-fprofile-selected-function-group=" +
786                                          Twine(SelectedFunctionGroup)));
787 
788   // Leave -fprofile-dir= an unused argument unless .gcda emission is
789   // enabled. To be polite, with '-fprofile-arcs -fno-profile-arcs' consider
790   // the flag used. There is no -fno-profile-dir, so the user has no
791   // targeted way to suppress the warning.
792   Arg *FProfileDir = nullptr;
793   if (Args.hasArg(options::OPT_fprofile_arcs) ||
794       Args.hasArg(options::OPT_coverage))
795     FProfileDir = Args.getLastArg(options::OPT_fprofile_dir);
796 
797   // TODO: Don't claim -c/-S to warn about -fsyntax-only -c/-S, -E -c/-S,
798   // like we warn about -fsyntax-only -E.
799   (void)(Args.hasArg(options::OPT_c) || Args.hasArg(options::OPT_S));
800 
801   // Put the .gcno and .gcda files (if needed) next to the primary output file,
802   // or fall back to a file in the current directory for `clang -c --coverage
803   // d/a.c` in the absence of -o.
804   if (EmitCovNotes || EmitCovData) {
805     SmallString<128> CoverageFilename;
806     if (Arg *DumpDir = Args.getLastArgNoClaim(options::OPT_dumpdir)) {
807       // Form ${dumpdir}${basename}.gcno. Note that dumpdir may not end with a
808       // path separator.
809       CoverageFilename = DumpDir->getValue();
810       CoverageFilename += llvm::sys::path::filename(Output.getBaseInput());
811     } else if (Arg *FinalOutput =
812                    C.getArgs().getLastArg(options::OPT__SLASH_Fo)) {
813       CoverageFilename = FinalOutput->getValue();
814     } else if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o)) {
815       CoverageFilename = FinalOutput->getValue();
816     } else {
817       CoverageFilename = llvm::sys::path::filename(Output.getBaseInput());
818     }
819     if (llvm::sys::path::is_relative(CoverageFilename))
820       (void)D.getVFS().makeAbsolute(CoverageFilename);
821     llvm::sys::path::replace_extension(CoverageFilename, "gcno");
822     if (EmitCovNotes) {
823       CmdArgs.push_back(
824           Args.MakeArgString("-coverage-notes-file=" + CoverageFilename));
825     }
826 
827     if (EmitCovData) {
828       if (FProfileDir) {
829         SmallString<128> Gcno = std::move(CoverageFilename);
830         CoverageFilename = FProfileDir->getValue();
831         llvm::sys::path::append(CoverageFilename, Gcno);
832       }
833       llvm::sys::path::replace_extension(CoverageFilename, "gcda");
834       CmdArgs.push_back(
835           Args.MakeArgString("-coverage-data-file=" + CoverageFilename));
836     }
837   }
838 }
839 
840 static void
RenderDebugEnablingArgs(const ArgList & Args,ArgStringList & CmdArgs,llvm::codegenoptions::DebugInfoKind DebugInfoKind,unsigned DwarfVersion,llvm::DebuggerKind DebuggerTuning)841 RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs,
842                         llvm::codegenoptions::DebugInfoKind DebugInfoKind,
843                         unsigned DwarfVersion,
844                         llvm::DebuggerKind DebuggerTuning) {
845   addDebugInfoKind(CmdArgs, DebugInfoKind);
846   if (DwarfVersion > 0)
847     CmdArgs.push_back(
848         Args.MakeArgString("-dwarf-version=" + Twine(DwarfVersion)));
849   switch (DebuggerTuning) {
850   case llvm::DebuggerKind::GDB:
851     CmdArgs.push_back("-debugger-tuning=gdb");
852     break;
853   case llvm::DebuggerKind::LLDB:
854     CmdArgs.push_back("-debugger-tuning=lldb");
855     break;
856   case llvm::DebuggerKind::SCE:
857     CmdArgs.push_back("-debugger-tuning=sce");
858     break;
859   case llvm::DebuggerKind::DBX:
860     CmdArgs.push_back("-debugger-tuning=dbx");
861     break;
862   default:
863     break;
864   }
865 }
866 
checkDebugInfoOption(const Arg * A,const ArgList & Args,const Driver & D,const ToolChain & TC)867 static bool checkDebugInfoOption(const Arg *A, const ArgList &Args,
868                                  const Driver &D, const ToolChain &TC) {
869   assert(A && "Expected non-nullptr argument.");
870   if (TC.supportsDebugInfoOption(A))
871     return true;
872   D.Diag(diag::warn_drv_unsupported_debug_info_opt_for_target)
873       << A->getAsString(Args) << TC.getTripleString();
874   return false;
875 }
876 
RenderDebugInfoCompressionArgs(const ArgList & Args,ArgStringList & CmdArgs,const Driver & D,const ToolChain & TC)877 static void RenderDebugInfoCompressionArgs(const ArgList &Args,
878                                            ArgStringList &CmdArgs,
879                                            const Driver &D,
880                                            const ToolChain &TC) {
881   const Arg *A = Args.getLastArg(options::OPT_gz_EQ);
882   if (!A)
883     return;
884   if (checkDebugInfoOption(A, Args, D, TC)) {
885     StringRef Value = A->getValue();
886     if (Value == "none") {
887       CmdArgs.push_back("--compress-debug-sections=none");
888     } else if (Value == "zlib") {
889       if (llvm::compression::zlib::isAvailable()) {
890         CmdArgs.push_back(
891             Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
892       } else {
893         D.Diag(diag::warn_debug_compression_unavailable) << "zlib";
894       }
895     } else if (Value == "zstd") {
896       if (llvm::compression::zstd::isAvailable()) {
897         CmdArgs.push_back(
898             Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
899       } else {
900         D.Diag(diag::warn_debug_compression_unavailable) << "zstd";
901       }
902     } else {
903       D.Diag(diag::err_drv_unsupported_option_argument)
904           << A->getSpelling() << Value;
905     }
906   }
907 }
908 
handleAMDGPUCodeObjectVersionOptions(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs,bool IsCC1As=false)909 static void handleAMDGPUCodeObjectVersionOptions(const Driver &D,
910                                                  const ArgList &Args,
911                                                  ArgStringList &CmdArgs,
912                                                  bool IsCC1As = false) {
913   // If no version was requested by the user, use the default value from the
914   // back end. This is consistent with the value returned from
915   // getAMDGPUCodeObjectVersion. This lets clang emit IR for amdgpu without
916   // requiring the corresponding llvm to have the AMDGPU target enabled,
917   // provided the user (e.g. front end tests) can use the default.
918   if (haveAMDGPUCodeObjectVersionArgument(D, Args)) {
919     unsigned CodeObjVer = getAMDGPUCodeObjectVersion(D, Args);
920     CmdArgs.insert(CmdArgs.begin() + 1,
921                    Args.MakeArgString(Twine("--amdhsa-code-object-version=") +
922                                       Twine(CodeObjVer)));
923     CmdArgs.insert(CmdArgs.begin() + 1, "-mllvm");
924     // -cc1as does not accept -mcode-object-version option.
925     if (!IsCC1As)
926       CmdArgs.insert(CmdArgs.begin() + 1,
927                      Args.MakeArgString(Twine("-mcode-object-version=") +
928                                         Twine(CodeObjVer)));
929   }
930 }
931 
maybeHasClangPchSignature(const Driver & D,StringRef Path)932 static bool maybeHasClangPchSignature(const Driver &D, StringRef Path) {
933   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> MemBuf =
934       D.getVFS().getBufferForFile(Path);
935   if (!MemBuf)
936     return false;
937   llvm::file_magic Magic = llvm::identify_magic((*MemBuf)->getBuffer());
938   if (Magic == llvm::file_magic::unknown)
939     return false;
940   // Return true for both raw Clang AST files and object files which may
941   // contain a __clangast section.
942   if (Magic == llvm::file_magic::clang_ast)
943     return true;
944   Expected<std::unique_ptr<llvm::object::ObjectFile>> Obj =
945       llvm::object::ObjectFile::createObjectFile(**MemBuf, Magic);
946   return !Obj.takeError();
947 }
948 
gchProbe(const Driver & D,StringRef Path)949 static bool gchProbe(const Driver &D, StringRef Path) {
950   llvm::ErrorOr<llvm::vfs::Status> Status = D.getVFS().status(Path);
951   if (!Status)
952     return false;
953 
954   if (Status->isDirectory()) {
955     std::error_code EC;
956     for (llvm::vfs::directory_iterator DI = D.getVFS().dir_begin(Path, EC), DE;
957          !EC && DI != DE; DI = DI.increment(EC)) {
958       if (maybeHasClangPchSignature(D, DI->path()))
959         return true;
960     }
961     D.Diag(diag::warn_drv_pch_ignoring_gch_dir) << Path;
962     return false;
963   }
964 
965   if (maybeHasClangPchSignature(D, Path))
966     return true;
967   D.Diag(diag::warn_drv_pch_ignoring_gch_file) << Path;
968   return false;
969 }
970 
AddPreprocessingOptions(Compilation & C,const JobAction & JA,const Driver & D,const ArgList & Args,ArgStringList & CmdArgs,const InputInfo & Output,const InputInfoList & Inputs) const971 void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
972                                     const Driver &D, const ArgList &Args,
973                                     ArgStringList &CmdArgs,
974                                     const InputInfo &Output,
975                                     const InputInfoList &Inputs) const {
976   const bool IsIAMCU = getToolChain().getTriple().isOSIAMCU();
977 
978   CheckPreprocessingOptions(D, Args);
979 
980   Args.AddLastArg(CmdArgs, options::OPT_C);
981   Args.AddLastArg(CmdArgs, options::OPT_CC);
982 
983   // Handle dependency file generation.
984   Arg *ArgM = Args.getLastArg(options::OPT_MM);
985   if (!ArgM)
986     ArgM = Args.getLastArg(options::OPT_M);
987   Arg *ArgMD = Args.getLastArg(options::OPT_MMD);
988   if (!ArgMD)
989     ArgMD = Args.getLastArg(options::OPT_MD);
990 
991   // -M and -MM imply -w.
992   if (ArgM)
993     CmdArgs.push_back("-w");
994   else
995     ArgM = ArgMD;
996 
997   if (ArgM) {
998     // Determine the output location.
999     const char *DepFile;
1000     if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
1001       DepFile = MF->getValue();
1002       C.addFailureResultFile(DepFile, &JA);
1003     } else if (Output.getType() == types::TY_Dependencies) {
1004       DepFile = Output.getFilename();
1005     } else if (!ArgMD) {
1006       DepFile = "-";
1007     } else {
1008       DepFile = getDependencyFileName(Args, Inputs);
1009       C.addFailureResultFile(DepFile, &JA);
1010     }
1011     CmdArgs.push_back("-dependency-file");
1012     CmdArgs.push_back(DepFile);
1013 
1014     bool HasTarget = false;
1015     for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {
1016       HasTarget = true;
1017       A->claim();
1018       if (A->getOption().matches(options::OPT_MT)) {
1019         A->render(Args, CmdArgs);
1020       } else {
1021         CmdArgs.push_back("-MT");
1022         SmallString<128> Quoted;
1023         quoteMakeTarget(A->getValue(), Quoted);
1024         CmdArgs.push_back(Args.MakeArgString(Quoted));
1025       }
1026     }
1027 
1028     // Add a default target if one wasn't specified.
1029     if (!HasTarget) {
1030       const char *DepTarget;
1031 
1032       // If user provided -o, that is the dependency target, except
1033       // when we are only generating a dependency file.
1034       Arg *OutputOpt = Args.getLastArg(options::OPT_o, options::OPT__SLASH_Fo);
1035       if (OutputOpt && Output.getType() != types::TY_Dependencies) {
1036         DepTarget = OutputOpt->getValue();
1037       } else {
1038         // Otherwise derive from the base input.
1039         //
1040         // FIXME: This should use the computed output file location.
1041         SmallString<128> P(Inputs[0].getBaseInput());
1042         llvm::sys::path::replace_extension(P, "o");
1043         DepTarget = Args.MakeArgString(llvm::sys::path::filename(P));
1044       }
1045 
1046       CmdArgs.push_back("-MT");
1047       SmallString<128> Quoted;
1048       quoteMakeTarget(DepTarget, Quoted);
1049       CmdArgs.push_back(Args.MakeArgString(Quoted));
1050     }
1051 
1052     if (ArgM->getOption().matches(options::OPT_M) ||
1053         ArgM->getOption().matches(options::OPT_MD))
1054       CmdArgs.push_back("-sys-header-deps");
1055     if ((isa<PrecompileJobAction>(JA) &&
1056          !Args.hasArg(options::OPT_fno_module_file_deps)) ||
1057         Args.hasArg(options::OPT_fmodule_file_deps))
1058       CmdArgs.push_back("-module-file-deps");
1059   }
1060 
1061   if (Args.hasArg(options::OPT_MG)) {
1062     if (!ArgM || ArgM->getOption().matches(options::OPT_MD) ||
1063         ArgM->getOption().matches(options::OPT_MMD))
1064       D.Diag(diag::err_drv_mg_requires_m_or_mm);
1065     CmdArgs.push_back("-MG");
1066   }
1067 
1068   Args.AddLastArg(CmdArgs, options::OPT_MP);
1069   Args.AddLastArg(CmdArgs, options::OPT_MV);
1070 
1071   // Add offload include arguments specific for CUDA/HIP.  This must happen
1072   // before we -I or -include anything else, because we must pick up the
1073   // CUDA/HIP headers from the particular CUDA/ROCm installation, rather than
1074   // from e.g. /usr/local/include.
1075   if (JA.isOffloading(Action::OFK_Cuda))
1076     getToolChain().AddCudaIncludeArgs(Args, CmdArgs);
1077   if (JA.isOffloading(Action::OFK_HIP))
1078     getToolChain().AddHIPIncludeArgs(Args, CmdArgs);
1079 
1080   // If we are offloading to a target via OpenMP we need to include the
1081   // openmp_wrappers folder which contains alternative system headers.
1082   if (JA.isDeviceOffloading(Action::OFK_OpenMP) &&
1083       !Args.hasArg(options::OPT_nostdinc) &&
1084       !Args.hasArg(options::OPT_nogpuinc) &&
1085       (getToolChain().getTriple().isNVPTX() ||
1086        getToolChain().getTriple().isAMDGCN())) {
1087     if (!Args.hasArg(options::OPT_nobuiltininc)) {
1088       // Add openmp_wrappers/* to our system include path.  This lets us wrap
1089       // standard library headers.
1090       SmallString<128> P(D.ResourceDir);
1091       llvm::sys::path::append(P, "include");
1092       llvm::sys::path::append(P, "openmp_wrappers");
1093       CmdArgs.push_back("-internal-isystem");
1094       CmdArgs.push_back(Args.MakeArgString(P));
1095     }
1096 
1097     CmdArgs.push_back("-include");
1098     CmdArgs.push_back("__clang_openmp_device_functions.h");
1099   }
1100 
1101   // Add -i* options, and automatically translate to
1102   // -include-pch/-include-pth for transparent PCH support. It's
1103   // wonky, but we include looking for .gch so we can support seamless
1104   // replacement into a build system already set up to be generating
1105   // .gch files.
1106 
1107   if (getToolChain().getDriver().IsCLMode()) {
1108     const Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
1109     const Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
1110     if (YcArg && JA.getKind() >= Action::PrecompileJobClass &&
1111         JA.getKind() <= Action::AssembleJobClass) {
1112       CmdArgs.push_back(Args.MakeArgString("-building-pch-with-obj"));
1113       // -fpch-instantiate-templates is the default when creating
1114       // precomp using /Yc
1115       if (Args.hasFlag(options::OPT_fpch_instantiate_templates,
1116                        options::OPT_fno_pch_instantiate_templates, true))
1117         CmdArgs.push_back(Args.MakeArgString("-fpch-instantiate-templates"));
1118     }
1119     if (YcArg || YuArg) {
1120       StringRef ThroughHeader = YcArg ? YcArg->getValue() : YuArg->getValue();
1121       if (!isa<PrecompileJobAction>(JA)) {
1122         CmdArgs.push_back("-include-pch");
1123         CmdArgs.push_back(Args.MakeArgString(D.GetClPchPath(
1124             C, !ThroughHeader.empty()
1125                    ? ThroughHeader
1126                    : llvm::sys::path::filename(Inputs[0].getBaseInput()))));
1127       }
1128 
1129       if (ThroughHeader.empty()) {
1130         CmdArgs.push_back(Args.MakeArgString(
1131             Twine("-pch-through-hdrstop-") + (YcArg ? "create" : "use")));
1132       } else {
1133         CmdArgs.push_back(
1134             Args.MakeArgString(Twine("-pch-through-header=") + ThroughHeader));
1135       }
1136     }
1137   }
1138 
1139   bool RenderedImplicitInclude = false;
1140   for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) {
1141     if (A->getOption().matches(options::OPT_include) &&
1142         D.getProbePrecompiled()) {
1143       // Handling of gcc-style gch precompiled headers.
1144       bool IsFirstImplicitInclude = !RenderedImplicitInclude;
1145       RenderedImplicitInclude = true;
1146 
1147       bool FoundPCH = false;
1148       SmallString<128> P(A->getValue());
1149       // We want the files to have a name like foo.h.pch. Add a dummy extension
1150       // so that replace_extension does the right thing.
1151       P += ".dummy";
1152       llvm::sys::path::replace_extension(P, "pch");
1153       if (D.getVFS().exists(P))
1154         FoundPCH = true;
1155 
1156       if (!FoundPCH) {
1157         // For GCC compat, probe for a file or directory ending in .gch instead.
1158         llvm::sys::path::replace_extension(P, "gch");
1159         FoundPCH = gchProbe(D, P.str());
1160       }
1161 
1162       if (FoundPCH) {
1163         if (IsFirstImplicitInclude) {
1164           A->claim();
1165           CmdArgs.push_back("-include-pch");
1166           CmdArgs.push_back(Args.MakeArgString(P));
1167           continue;
1168         } else {
1169           // Ignore the PCH if not first on command line and emit warning.
1170           D.Diag(diag::warn_drv_pch_not_first_include) << P
1171                                                        << A->getAsString(Args);
1172         }
1173       }
1174     } else if (A->getOption().matches(options::OPT_isystem_after)) {
1175       // Handling of paths which must come late.  These entries are handled by
1176       // the toolchain itself after the resource dir is inserted in the right
1177       // search order.
1178       // Do not claim the argument so that the use of the argument does not
1179       // silently go unnoticed on toolchains which do not honour the option.
1180       continue;
1181     } else if (A->getOption().matches(options::OPT_stdlibxx_isystem)) {
1182       // Translated to -internal-isystem by the driver, no need to pass to cc1.
1183       continue;
1184     } else if (A->getOption().matches(options::OPT_ibuiltininc)) {
1185       // This is used only by the driver. No need to pass to cc1.
1186       continue;
1187     }
1188 
1189     // Not translated, render as usual.
1190     A->claim();
1191     A->render(Args, CmdArgs);
1192   }
1193 
1194   Args.addAllArgs(CmdArgs,
1195                   {options::OPT_D, options::OPT_U, options::OPT_I_Group,
1196                    options::OPT_F, options::OPT_index_header_map,
1197                    options::OPT_embed_dir_EQ});
1198 
1199   // Add -Wp, and -Xpreprocessor if using the preprocessor.
1200 
1201   // FIXME: There is a very unfortunate problem here, some troubled
1202   // souls abuse -Wp, to pass preprocessor options in gcc syntax. To
1203   // really support that we would have to parse and then translate
1204   // those options. :(
1205   Args.AddAllArgValues(CmdArgs, options::OPT_Wp_COMMA,
1206                        options::OPT_Xpreprocessor);
1207 
1208   // -I- is a deprecated GCC feature, reject it.
1209   if (Arg *A = Args.getLastArg(options::OPT_I_))
1210     D.Diag(diag::err_drv_I_dash_not_supported) << A->getAsString(Args);
1211 
1212   // If we have a --sysroot, and don't have an explicit -isysroot flag, add an
1213   // -isysroot to the CC1 invocation.
1214   StringRef sysroot = C.getSysRoot();
1215   if (sysroot != "") {
1216     if (!Args.hasArg(options::OPT_isysroot)) {
1217       CmdArgs.push_back("-isysroot");
1218       CmdArgs.push_back(C.getArgs().MakeArgString(sysroot));
1219     }
1220   }
1221 
1222   // Parse additional include paths from environment variables.
1223   // FIXME: We should probably sink the logic for handling these from the
1224   // frontend into the driver. It will allow deleting 4 otherwise unused flags.
1225   // CPATH - included following the user specified includes (but prior to
1226   // builtin and standard includes).
1227   addDirectoryList(Args, CmdArgs, "-I", "CPATH");
1228   // C_INCLUDE_PATH - system includes enabled when compiling C.
1229   addDirectoryList(Args, CmdArgs, "-c-isystem", "C_INCLUDE_PATH");
1230   // CPLUS_INCLUDE_PATH - system includes enabled when compiling C++.
1231   addDirectoryList(Args, CmdArgs, "-cxx-isystem", "CPLUS_INCLUDE_PATH");
1232   // OBJC_INCLUDE_PATH - system includes enabled when compiling ObjC.
1233   addDirectoryList(Args, CmdArgs, "-objc-isystem", "OBJC_INCLUDE_PATH");
1234   // OBJCPLUS_INCLUDE_PATH - system includes enabled when compiling ObjC++.
1235   addDirectoryList(Args, CmdArgs, "-objcxx-isystem", "OBJCPLUS_INCLUDE_PATH");
1236 
1237   // While adding the include arguments, we also attempt to retrieve the
1238   // arguments of related offloading toolchains or arguments that are specific
1239   // of an offloading programming model.
1240 
1241   // Add C++ include arguments, if needed.
1242   if (types::isCXX(Inputs[0].getType())) {
1243     bool HasStdlibxxIsystem = Args.hasArg(options::OPT_stdlibxx_isystem);
1244     forAllAssociatedToolChains(
1245         C, JA, getToolChain(),
1246         [&Args, &CmdArgs, HasStdlibxxIsystem](const ToolChain &TC) {
1247           HasStdlibxxIsystem ? TC.AddClangCXXStdlibIsystemArgs(Args, CmdArgs)
1248                              : TC.AddClangCXXStdlibIncludeArgs(Args, CmdArgs);
1249         });
1250   }
1251 
1252   // If we are compiling for a GPU target we want to override the system headers
1253   // with ones created by the 'libc' project if present.
1254   // TODO: This should be moved to `AddClangSystemIncludeArgs` by passing the
1255   //       OffloadKind as an argument.
1256   if (!Args.hasArg(options::OPT_nostdinc) &&
1257       !Args.hasArg(options::OPT_nogpuinc) &&
1258       !Args.hasArg(options::OPT_nobuiltininc)) {
1259     // Without an offloading language we will include these headers directly.
1260     // Offloading languages will instead only use the declarations stored in
1261     // the resource directory at clang/lib/Headers/llvm_libc_wrappers.
1262     if ((getToolChain().getTriple().isNVPTX() ||
1263          getToolChain().getTriple().isAMDGCN()) &&
1264         C.getActiveOffloadKinds() == Action::OFK_None) {
1265       SmallString<128> P(llvm::sys::path::parent_path(D.Dir));
1266       llvm::sys::path::append(P, "include");
1267       llvm::sys::path::append(P, getToolChain().getTripleString());
1268       CmdArgs.push_back("-internal-isystem");
1269       CmdArgs.push_back(Args.MakeArgString(P));
1270     } else if (C.getActiveOffloadKinds() == Action::OFK_OpenMP) {
1271       // TODO: CUDA / HIP include their own headers for some common functions
1272       // implemented here. We'll need to clean those up so they do not conflict.
1273       SmallString<128> P(D.ResourceDir);
1274       llvm::sys::path::append(P, "include");
1275       llvm::sys::path::append(P, "llvm_libc_wrappers");
1276       CmdArgs.push_back("-internal-isystem");
1277       CmdArgs.push_back(Args.MakeArgString(P));
1278     }
1279   }
1280 
1281   // Add system include arguments for all targets but IAMCU.
1282   if (!IsIAMCU)
1283     forAllAssociatedToolChains(C, JA, getToolChain(),
1284                                [&Args, &CmdArgs](const ToolChain &TC) {
1285                                  TC.AddClangSystemIncludeArgs(Args, CmdArgs);
1286                                });
1287   else {
1288     // For IAMCU add special include arguments.
1289     getToolChain().AddIAMCUIncludeArgs(Args, CmdArgs);
1290   }
1291 
1292   addMacroPrefixMapArg(D, Args, CmdArgs);
1293   addCoveragePrefixMapArg(D, Args, CmdArgs);
1294 
1295   Args.AddLastArg(CmdArgs, options::OPT_ffile_reproducible,
1296                   options::OPT_fno_file_reproducible);
1297 
1298   if (const char *Epoch = std::getenv("SOURCE_DATE_EPOCH")) {
1299     CmdArgs.push_back("-source-date-epoch");
1300     CmdArgs.push_back(Args.MakeArgString(Epoch));
1301   }
1302 
1303   Args.addOptInFlag(CmdArgs, options::OPT_fdefine_target_os_macros,
1304                     options::OPT_fno_define_target_os_macros);
1305 }
1306 
1307 // FIXME: Move to target hook.
isSignedCharDefault(const llvm::Triple & Triple)1308 static bool isSignedCharDefault(const llvm::Triple &Triple) {
1309   switch (Triple.getArch()) {
1310   default:
1311     return true;
1312 
1313   case llvm::Triple::aarch64:
1314   case llvm::Triple::aarch64_32:
1315   case llvm::Triple::aarch64_be:
1316   case llvm::Triple::arm:
1317   case llvm::Triple::armeb:
1318   case llvm::Triple::thumb:
1319   case llvm::Triple::thumbeb:
1320     if (Triple.isOSDarwin() || Triple.isOSWindows())
1321       return true;
1322     return false;
1323 
1324   case llvm::Triple::ppc:
1325   case llvm::Triple::ppc64:
1326     if (Triple.isOSDarwin())
1327       return true;
1328     return false;
1329 
1330   case llvm::Triple::hexagon:
1331   case llvm::Triple::ppcle:
1332   case llvm::Triple::ppc64le:
1333   case llvm::Triple::riscv32:
1334   case llvm::Triple::riscv64:
1335   case llvm::Triple::systemz:
1336   case llvm::Triple::xcore:
1337     return false;
1338   }
1339 }
1340 
hasMultipleInvocations(const llvm::Triple & Triple,const ArgList & Args)1341 static bool hasMultipleInvocations(const llvm::Triple &Triple,
1342                                    const ArgList &Args) {
1343   // Supported only on Darwin where we invoke the compiler multiple times
1344   // followed by an invocation to lipo.
1345   if (!Triple.isOSDarwin())
1346     return false;
1347   // If more than one "-arch <arch>" is specified, we're targeting multiple
1348   // architectures resulting in a fat binary.
1349   return Args.getAllArgValues(options::OPT_arch).size() > 1;
1350 }
1351 
checkRemarksOptions(const Driver & D,const ArgList & Args,const llvm::Triple & Triple)1352 static bool checkRemarksOptions(const Driver &D, const ArgList &Args,
1353                                 const llvm::Triple &Triple) {
1354   // When enabling remarks, we need to error if:
1355   // * The remark file is specified but we're targeting multiple architectures,
1356   // which means more than one remark file is being generated.
1357   bool hasMultipleInvocations = ::hasMultipleInvocations(Triple, Args);
1358   bool hasExplicitOutputFile =
1359       Args.getLastArg(options::OPT_foptimization_record_file_EQ);
1360   if (hasMultipleInvocations && hasExplicitOutputFile) {
1361     D.Diag(diag::err_drv_invalid_output_with_multiple_archs)
1362         << "-foptimization-record-file";
1363     return false;
1364   }
1365   return true;
1366 }
1367 
renderRemarksOptions(const ArgList & Args,ArgStringList & CmdArgs,const llvm::Triple & Triple,const InputInfo & Input,const InputInfo & Output,const JobAction & JA)1368 static void renderRemarksOptions(const ArgList &Args, ArgStringList &CmdArgs,
1369                                  const llvm::Triple &Triple,
1370                                  const InputInfo &Input,
1371                                  const InputInfo &Output, const JobAction &JA) {
1372   StringRef Format = "yaml";
1373   if (const Arg *A = Args.getLastArg(options::OPT_fsave_optimization_record_EQ))
1374     Format = A->getValue();
1375 
1376   CmdArgs.push_back("-opt-record-file");
1377 
1378   const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ);
1379   if (A) {
1380     CmdArgs.push_back(A->getValue());
1381   } else {
1382     bool hasMultipleArchs =
1383         Triple.isOSDarwin() && // Only supported on Darwin platforms.
1384         Args.getAllArgValues(options::OPT_arch).size() > 1;
1385 
1386     SmallString<128> F;
1387 
1388     if (Args.hasArg(options::OPT_c) || Args.hasArg(options::OPT_S)) {
1389       if (Arg *FinalOutput = Args.getLastArg(options::OPT_o))
1390         F = FinalOutput->getValue();
1391     } else {
1392       if (Format != "yaml" && // For YAML, keep the original behavior.
1393           Triple.isOSDarwin() && // Enable this only on darwin, since it's the only platform supporting .dSYM bundles.
1394           Output.isFilename())
1395         F = Output.getFilename();
1396     }
1397 
1398     if (F.empty()) {
1399       // Use the input filename.
1400       F = llvm::sys::path::stem(Input.getBaseInput());
1401 
1402       // If we're compiling for an offload architecture (i.e. a CUDA device),
1403       // we need to make the file name for the device compilation different
1404       // from the host compilation.
1405       if (!JA.isDeviceOffloading(Action::OFK_None) &&
1406           !JA.isDeviceOffloading(Action::OFK_Host)) {
1407         llvm::sys::path::replace_extension(F, "");
1408         F += Action::GetOffloadingFileNamePrefix(JA.getOffloadingDeviceKind(),
1409                                                  Triple.normalize());
1410         F += "-";
1411         F += JA.getOffloadingArch();
1412       }
1413     }
1414 
1415     // If we're having more than one "-arch", we should name the files
1416     // differently so that every cc1 invocation writes to a different file.
1417     // We're doing that by appending "-<arch>" with "<arch>" being the arch
1418     // name from the triple.
1419     if (hasMultipleArchs) {
1420       // First, remember the extension.
1421       SmallString<64> OldExtension = llvm::sys::path::extension(F);
1422       // then, remove it.
1423       llvm::sys::path::replace_extension(F, "");
1424       // attach -<arch> to it.
1425       F += "-";
1426       F += Triple.getArchName();
1427       // put back the extension.
1428       llvm::sys::path::replace_extension(F, OldExtension);
1429     }
1430 
1431     SmallString<32> Extension;
1432     Extension += "opt.";
1433     Extension += Format;
1434 
1435     llvm::sys::path::replace_extension(F, Extension);
1436     CmdArgs.push_back(Args.MakeArgString(F));
1437   }
1438 
1439   if (const Arg *A =
1440           Args.getLastArg(options::OPT_foptimization_record_passes_EQ)) {
1441     CmdArgs.push_back("-opt-record-passes");
1442     CmdArgs.push_back(A->getValue());
1443   }
1444 
1445   if (!Format.empty()) {
1446     CmdArgs.push_back("-opt-record-format");
1447     CmdArgs.push_back(Format.data());
1448   }
1449 }
1450 
AddAAPCSVolatileBitfieldArgs(const ArgList & Args,ArgStringList & CmdArgs)1451 void AddAAPCSVolatileBitfieldArgs(const ArgList &Args, ArgStringList &CmdArgs) {
1452   if (!Args.hasFlag(options::OPT_faapcs_bitfield_width,
1453                     options::OPT_fno_aapcs_bitfield_width, true))
1454     CmdArgs.push_back("-fno-aapcs-bitfield-width");
1455 
1456   if (Args.getLastArg(options::OPT_ForceAAPCSBitfieldLoad))
1457     CmdArgs.push_back("-faapcs-bitfield-load");
1458 }
1459 
1460 namespace {
RenderARMABI(const Driver & D,const llvm::Triple & Triple,const ArgList & Args,ArgStringList & CmdArgs)1461 void RenderARMABI(const Driver &D, const llvm::Triple &Triple,
1462                   const ArgList &Args, ArgStringList &CmdArgs) {
1463   // Select the ABI to use.
1464   // FIXME: Support -meabi.
1465   // FIXME: Parts of this are duplicated in the backend, unify this somehow.
1466   const char *ABIName = nullptr;
1467   if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
1468     ABIName = A->getValue();
1469   } else {
1470     std::string CPU = getCPUName(D, Args, Triple, /*FromAs*/ false);
1471     ABIName = llvm::ARM::computeDefaultTargetABI(Triple, CPU).data();
1472   }
1473 
1474   CmdArgs.push_back("-target-abi");
1475   CmdArgs.push_back(ABIName);
1476 }
1477 
AddUnalignedAccessWarning(ArgStringList & CmdArgs)1478 void AddUnalignedAccessWarning(ArgStringList &CmdArgs) {
1479   auto StrictAlignIter =
1480       llvm::find_if(llvm::reverse(CmdArgs), [](StringRef Arg) {
1481         return Arg == "+strict-align" || Arg == "-strict-align";
1482       });
1483   if (StrictAlignIter != CmdArgs.rend() &&
1484       StringRef(*StrictAlignIter) == "+strict-align")
1485     CmdArgs.push_back("-Wunaligned-access");
1486 }
1487 }
1488 
1489 // Each combination of options here forms a signing schema, and in most cases
1490 // each signing schema is its own incompatible ABI. The default values of the
1491 // options represent the default signing schema.
handlePAuthABI(const ArgList & DriverArgs,ArgStringList & CC1Args)1492 static void handlePAuthABI(const ArgList &DriverArgs, ArgStringList &CC1Args) {
1493   if (!DriverArgs.hasArg(options::OPT_fptrauth_intrinsics,
1494                          options::OPT_fno_ptrauth_intrinsics))
1495     CC1Args.push_back("-fptrauth-intrinsics");
1496 
1497   if (!DriverArgs.hasArg(options::OPT_fptrauth_calls,
1498                          options::OPT_fno_ptrauth_calls))
1499     CC1Args.push_back("-fptrauth-calls");
1500 
1501   if (!DriverArgs.hasArg(options::OPT_fptrauth_returns,
1502                          options::OPT_fno_ptrauth_returns))
1503     CC1Args.push_back("-fptrauth-returns");
1504 
1505   if (!DriverArgs.hasArg(options::OPT_fptrauth_auth_traps,
1506                          options::OPT_fno_ptrauth_auth_traps))
1507     CC1Args.push_back("-fptrauth-auth-traps");
1508 
1509   if (!DriverArgs.hasArg(
1510           options::OPT_fptrauth_vtable_pointer_address_discrimination,
1511           options::OPT_fno_ptrauth_vtable_pointer_address_discrimination))
1512     CC1Args.push_back("-fptrauth-vtable-pointer-address-discrimination");
1513 
1514   if (!DriverArgs.hasArg(
1515           options::OPT_fptrauth_vtable_pointer_type_discrimination,
1516           options::OPT_fno_ptrauth_vtable_pointer_type_discrimination))
1517     CC1Args.push_back("-fptrauth-vtable-pointer-type-discrimination");
1518 
1519   if (!DriverArgs.hasArg(options::OPT_fptrauth_indirect_gotos,
1520                          options::OPT_fno_ptrauth_indirect_gotos))
1521     CC1Args.push_back("-fptrauth-indirect-gotos");
1522 
1523   if (!DriverArgs.hasArg(options::OPT_fptrauth_init_fini,
1524                          options::OPT_fno_ptrauth_init_fini))
1525     CC1Args.push_back("-fptrauth-init-fini");
1526 }
1527 
CollectARMPACBTIOptions(const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs,bool isAArch64)1528 static void CollectARMPACBTIOptions(const ToolChain &TC, const ArgList &Args,
1529                                     ArgStringList &CmdArgs, bool isAArch64) {
1530   const Arg *A = isAArch64
1531                      ? Args.getLastArg(options::OPT_msign_return_address_EQ,
1532                                        options::OPT_mbranch_protection_EQ)
1533                      : Args.getLastArg(options::OPT_mbranch_protection_EQ);
1534   if (!A)
1535     return;
1536 
1537   const Driver &D = TC.getDriver();
1538   const llvm::Triple &Triple = TC.getEffectiveTriple();
1539   if (!(isAArch64 || (Triple.isArmT32() && Triple.isArmMClass())))
1540     D.Diag(diag::warn_incompatible_branch_protection_option)
1541         << Triple.getArchName();
1542 
1543   StringRef Scope, Key;
1544   bool IndirectBranches, BranchProtectionPAuthLR, GuardedControlStack;
1545 
1546   if (A->getOption().matches(options::OPT_msign_return_address_EQ)) {
1547     Scope = A->getValue();
1548     if (Scope != "none" && Scope != "non-leaf" && Scope != "all")
1549       D.Diag(diag::err_drv_unsupported_option_argument)
1550           << A->getSpelling() << Scope;
1551     Key = "a_key";
1552     IndirectBranches = false;
1553     BranchProtectionPAuthLR = false;
1554     GuardedControlStack = false;
1555   } else {
1556     StringRef DiagMsg;
1557     llvm::ARM::ParsedBranchProtection PBP;
1558     bool EnablePAuthLR = false;
1559 
1560     // To know if we need to enable PAuth-LR As part of the standard branch
1561     // protection option, it needs to be determined if the feature has been
1562     // activated in the `march` argument. This information is stored within the
1563     // CmdArgs variable and can be found using a search.
1564     if (isAArch64) {
1565       auto isPAuthLR = [](const char *member) {
1566         llvm::AArch64::ExtensionInfo pauthlr_extension =
1567             llvm::AArch64::getExtensionByID(llvm::AArch64::AEK_PAUTHLR);
1568         return pauthlr_extension.PosTargetFeature == member;
1569       };
1570 
1571       if (std::any_of(CmdArgs.begin(), CmdArgs.end(), isPAuthLR))
1572         EnablePAuthLR = true;
1573     }
1574     if (!llvm::ARM::parseBranchProtection(A->getValue(), PBP, DiagMsg,
1575                                           EnablePAuthLR))
1576       D.Diag(diag::err_drv_unsupported_option_argument)
1577           << A->getSpelling() << DiagMsg;
1578     if (!isAArch64 && PBP.Key == "b_key")
1579       D.Diag(diag::warn_unsupported_branch_protection)
1580           << "b-key" << A->getAsString(Args);
1581     Scope = PBP.Scope;
1582     Key = PBP.Key;
1583     BranchProtectionPAuthLR = PBP.BranchProtectionPAuthLR;
1584     IndirectBranches = PBP.BranchTargetEnforcement;
1585     GuardedControlStack = PBP.GuardedControlStack;
1586   }
1587 
1588   CmdArgs.push_back(
1589       Args.MakeArgString(Twine("-msign-return-address=") + Scope));
1590   if (Scope != "none") {
1591     if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
1592       D.Diag(diag::err_drv_unsupported_opt_for_target)
1593           << A->getAsString(Args) << Triple.getTriple();
1594     CmdArgs.push_back(
1595         Args.MakeArgString(Twine("-msign-return-address-key=") + Key));
1596   }
1597   if (BranchProtectionPAuthLR) {
1598     if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
1599       D.Diag(diag::err_drv_unsupported_opt_for_target)
1600           << A->getAsString(Args) << Triple.getTriple();
1601     CmdArgs.push_back(
1602         Args.MakeArgString(Twine("-mbranch-protection-pauth-lr")));
1603   }
1604   if (IndirectBranches)
1605     CmdArgs.push_back("-mbranch-target-enforce");
1606   // GCS is currently untested with PAuthABI, but enabling this could be allowed
1607   // in future after testing with a suitable system.
1608   if (GuardedControlStack) {
1609     if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
1610       D.Diag(diag::err_drv_unsupported_opt_for_target)
1611           << A->getAsString(Args) << Triple.getTriple();
1612     CmdArgs.push_back("-mguarded-control-stack");
1613   }
1614 }
1615 
AddARMTargetArgs(const llvm::Triple & Triple,const ArgList & Args,ArgStringList & CmdArgs,bool KernelOrKext) const1616 void Clang::AddARMTargetArgs(const llvm::Triple &Triple, const ArgList &Args,
1617                              ArgStringList &CmdArgs, bool KernelOrKext) const {
1618   RenderARMABI(getToolChain().getDriver(), Triple, Args, CmdArgs);
1619 
1620   // Determine floating point ABI from the options & target defaults.
1621   arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);
1622   if (ABI == arm::FloatABI::Soft) {
1623     // Floating point operations and argument passing are soft.
1624     // FIXME: This changes CPP defines, we need -target-soft-float.
1625     CmdArgs.push_back("-msoft-float");
1626     CmdArgs.push_back("-mfloat-abi");
1627     CmdArgs.push_back("soft");
1628   } else if (ABI == arm::FloatABI::SoftFP) {
1629     // Floating point operations are hard, but argument passing is soft.
1630     CmdArgs.push_back("-mfloat-abi");
1631     CmdArgs.push_back("soft");
1632   } else {
1633     // Floating point operations and argument passing are hard.
1634     assert(ABI == arm::FloatABI::Hard && "Invalid float abi!");
1635     CmdArgs.push_back("-mfloat-abi");
1636     CmdArgs.push_back("hard");
1637   }
1638 
1639   // Forward the -mglobal-merge option for explicit control over the pass.
1640   if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1641                                options::OPT_mno_global_merge)) {
1642     CmdArgs.push_back("-mllvm");
1643     if (A->getOption().matches(options::OPT_mno_global_merge))
1644       CmdArgs.push_back("-arm-global-merge=false");
1645     else
1646       CmdArgs.push_back("-arm-global-merge=true");
1647   }
1648 
1649   if (!Args.hasFlag(options::OPT_mimplicit_float,
1650                     options::OPT_mno_implicit_float, true))
1651     CmdArgs.push_back("-no-implicit-float");
1652 
1653   if (Args.getLastArg(options::OPT_mcmse))
1654     CmdArgs.push_back("-mcmse");
1655 
1656   AddAAPCSVolatileBitfieldArgs(Args, CmdArgs);
1657 
1658   // Enable/disable return address signing and indirect branch targets.
1659   CollectARMPACBTIOptions(getToolChain(), Args, CmdArgs, false /*isAArch64*/);
1660 
1661   AddUnalignedAccessWarning(CmdArgs);
1662 }
1663 
RenderTargetOptions(const llvm::Triple & EffectiveTriple,const ArgList & Args,bool KernelOrKext,ArgStringList & CmdArgs) const1664 void Clang::RenderTargetOptions(const llvm::Triple &EffectiveTriple,
1665                                 const ArgList &Args, bool KernelOrKext,
1666                                 ArgStringList &CmdArgs) const {
1667   const ToolChain &TC = getToolChain();
1668 
1669   // Add the target features
1670   getTargetFeatures(TC.getDriver(), EffectiveTriple, Args, CmdArgs, false);
1671 
1672   // Add target specific flags.
1673   switch (TC.getArch()) {
1674   default:
1675     break;
1676 
1677   case llvm::Triple::arm:
1678   case llvm::Triple::armeb:
1679   case llvm::Triple::thumb:
1680   case llvm::Triple::thumbeb:
1681     // Use the effective triple, which takes into account the deployment target.
1682     AddARMTargetArgs(EffectiveTriple, Args, CmdArgs, KernelOrKext);
1683     break;
1684 
1685   case llvm::Triple::aarch64:
1686   case llvm::Triple::aarch64_32:
1687   case llvm::Triple::aarch64_be:
1688     AddAArch64TargetArgs(Args, CmdArgs);
1689     break;
1690 
1691   case llvm::Triple::loongarch32:
1692   case llvm::Triple::loongarch64:
1693     AddLoongArchTargetArgs(Args, CmdArgs);
1694     break;
1695 
1696   case llvm::Triple::mips:
1697   case llvm::Triple::mipsel:
1698   case llvm::Triple::mips64:
1699   case llvm::Triple::mips64el:
1700     AddMIPSTargetArgs(Args, CmdArgs);
1701     break;
1702 
1703   case llvm::Triple::ppc:
1704   case llvm::Triple::ppcle:
1705   case llvm::Triple::ppc64:
1706   case llvm::Triple::ppc64le:
1707     AddPPCTargetArgs(Args, CmdArgs);
1708     break;
1709 
1710   case llvm::Triple::riscv32:
1711   case llvm::Triple::riscv64:
1712     AddRISCVTargetArgs(Args, CmdArgs);
1713     break;
1714 
1715   case llvm::Triple::sparc:
1716   case llvm::Triple::sparcel:
1717   case llvm::Triple::sparcv9:
1718     AddSparcTargetArgs(Args, CmdArgs);
1719     break;
1720 
1721   case llvm::Triple::systemz:
1722     AddSystemZTargetArgs(Args, CmdArgs);
1723     break;
1724 
1725   case llvm::Triple::x86:
1726   case llvm::Triple::x86_64:
1727     AddX86TargetArgs(Args, CmdArgs);
1728     break;
1729 
1730   case llvm::Triple::lanai:
1731     AddLanaiTargetArgs(Args, CmdArgs);
1732     break;
1733 
1734   case llvm::Triple::hexagon:
1735     AddHexagonTargetArgs(Args, CmdArgs);
1736     break;
1737 
1738   case llvm::Triple::wasm32:
1739   case llvm::Triple::wasm64:
1740     AddWebAssemblyTargetArgs(Args, CmdArgs);
1741     break;
1742 
1743   case llvm::Triple::ve:
1744     AddVETargetArgs(Args, CmdArgs);
1745     break;
1746   }
1747 }
1748 
1749 namespace {
RenderAArch64ABI(const llvm::Triple & Triple,const ArgList & Args,ArgStringList & CmdArgs)1750 void RenderAArch64ABI(const llvm::Triple &Triple, const ArgList &Args,
1751                       ArgStringList &CmdArgs) {
1752   const char *ABIName = nullptr;
1753   if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1754     ABIName = A->getValue();
1755   else if (Triple.isOSDarwin())
1756     ABIName = "darwinpcs";
1757   else if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
1758     ABIName = "pauthtest";
1759   else
1760     ABIName = "aapcs";
1761 
1762   CmdArgs.push_back("-target-abi");
1763   CmdArgs.push_back(ABIName);
1764 }
1765 }
1766 
AddAArch64TargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const1767 void Clang::AddAArch64TargetArgs(const ArgList &Args,
1768                                  ArgStringList &CmdArgs) const {
1769   const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
1770 
1771   if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1772       Args.hasArg(options::OPT_mkernel) ||
1773       Args.hasArg(options::OPT_fapple_kext))
1774     CmdArgs.push_back("-disable-red-zone");
1775 
1776   if (!Args.hasFlag(options::OPT_mimplicit_float,
1777                     options::OPT_mno_implicit_float, true))
1778     CmdArgs.push_back("-no-implicit-float");
1779 
1780   RenderAArch64ABI(Triple, Args, CmdArgs);
1781 
1782   // Forward the -mglobal-merge option for explicit control over the pass.
1783   if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1784                                options::OPT_mno_global_merge)) {
1785     CmdArgs.push_back("-mllvm");
1786     if (A->getOption().matches(options::OPT_mno_global_merge))
1787       CmdArgs.push_back("-aarch64-enable-global-merge=false");
1788     else
1789       CmdArgs.push_back("-aarch64-enable-global-merge=true");
1790   }
1791 
1792   // Enable/disable return address signing and indirect branch targets.
1793   CollectARMPACBTIOptions(getToolChain(), Args, CmdArgs, true /*isAArch64*/);
1794 
1795   if (Triple.getEnvironment() == llvm::Triple::PAuthTest)
1796     handlePAuthABI(Args, CmdArgs);
1797 
1798   // Handle -msve_vector_bits=<bits>
1799   if (Arg *A = Args.getLastArg(options::OPT_msve_vector_bits_EQ)) {
1800     StringRef Val = A->getValue();
1801     const Driver &D = getToolChain().getDriver();
1802     if (Val == "128" || Val == "256" || Val == "512" || Val == "1024" ||
1803         Val == "2048" || Val == "128+" || Val == "256+" || Val == "512+" ||
1804         Val == "1024+" || Val == "2048+") {
1805       unsigned Bits = 0;
1806       if (!Val.consume_back("+")) {
1807         bool Invalid = Val.getAsInteger(10, Bits); (void)Invalid;
1808         assert(!Invalid && "Failed to parse value");
1809         CmdArgs.push_back(
1810             Args.MakeArgString("-mvscale-max=" + llvm::Twine(Bits / 128)));
1811       }
1812 
1813       bool Invalid = Val.getAsInteger(10, Bits); (void)Invalid;
1814       assert(!Invalid && "Failed to parse value");
1815       CmdArgs.push_back(
1816           Args.MakeArgString("-mvscale-min=" + llvm::Twine(Bits / 128)));
1817     // Silently drop requests for vector-length agnostic code as it's implied.
1818     } else if (Val != "scalable")
1819       // Handle the unsupported values passed to msve-vector-bits.
1820       D.Diag(diag::err_drv_unsupported_option_argument)
1821           << A->getSpelling() << Val;
1822   }
1823 
1824   AddAAPCSVolatileBitfieldArgs(Args, CmdArgs);
1825 
1826   if (const Arg *A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)) {
1827     CmdArgs.push_back("-tune-cpu");
1828     if (strcmp(A->getValue(), "native") == 0)
1829       CmdArgs.push_back(Args.MakeArgString(llvm::sys::getHostCPUName()));
1830     else
1831       CmdArgs.push_back(A->getValue());
1832   }
1833 
1834   AddUnalignedAccessWarning(CmdArgs);
1835 
1836   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_intrinsics,
1837                     options::OPT_fno_ptrauth_intrinsics);
1838   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_calls,
1839                     options::OPT_fno_ptrauth_calls);
1840   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_returns,
1841                     options::OPT_fno_ptrauth_returns);
1842   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_auth_traps,
1843                     options::OPT_fno_ptrauth_auth_traps);
1844   Args.addOptInFlag(
1845       CmdArgs, options::OPT_fptrauth_vtable_pointer_address_discrimination,
1846       options::OPT_fno_ptrauth_vtable_pointer_address_discrimination);
1847   Args.addOptInFlag(
1848       CmdArgs, options::OPT_fptrauth_vtable_pointer_type_discrimination,
1849       options::OPT_fno_ptrauth_vtable_pointer_type_discrimination);
1850   Args.addOptInFlag(
1851       CmdArgs, options::OPT_fptrauth_type_info_vtable_pointer_discrimination,
1852       options::OPT_fno_ptrauth_type_info_vtable_pointer_discrimination);
1853   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_init_fini,
1854                     options::OPT_fno_ptrauth_init_fini);
1855   Args.addOptInFlag(
1856       CmdArgs, options::OPT_fptrauth_function_pointer_type_discrimination,
1857       options::OPT_fno_ptrauth_function_pointer_type_discrimination);
1858 
1859   Args.addOptInFlag(CmdArgs, options::OPT_fptrauth_indirect_gotos,
1860                     options::OPT_fno_ptrauth_indirect_gotos);
1861 }
1862 
AddLoongArchTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const1863 void Clang::AddLoongArchTargetArgs(const ArgList &Args,
1864                                    ArgStringList &CmdArgs) const {
1865   const llvm::Triple &Triple = getToolChain().getTriple();
1866 
1867   CmdArgs.push_back("-target-abi");
1868   CmdArgs.push_back(
1869       loongarch::getLoongArchABI(getToolChain().getDriver(), Args, Triple)
1870           .data());
1871 
1872   // Handle -mtune.
1873   if (const Arg *A = Args.getLastArg(options::OPT_mtune_EQ)) {
1874     std::string TuneCPU = A->getValue();
1875     TuneCPU = loongarch::postProcessTargetCPUString(TuneCPU, Triple);
1876     CmdArgs.push_back("-tune-cpu");
1877     CmdArgs.push_back(Args.MakeArgString(TuneCPU));
1878   }
1879 }
1880 
AddMIPSTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const1881 void Clang::AddMIPSTargetArgs(const ArgList &Args,
1882                               ArgStringList &CmdArgs) const {
1883   const Driver &D = getToolChain().getDriver();
1884   StringRef CPUName;
1885   StringRef ABIName;
1886   const llvm::Triple &Triple = getToolChain().getTriple();
1887   mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1888 
1889   CmdArgs.push_back("-target-abi");
1890   CmdArgs.push_back(ABIName.data());
1891 
1892   mips::FloatABI ABI = mips::getMipsFloatABI(D, Args, Triple);
1893   if (ABI == mips::FloatABI::Soft) {
1894     // Floating point operations and argument passing are soft.
1895     CmdArgs.push_back("-msoft-float");
1896     CmdArgs.push_back("-mfloat-abi");
1897     CmdArgs.push_back("soft");
1898   } else {
1899     // Floating point operations and argument passing are hard.
1900     assert(ABI == mips::FloatABI::Hard && "Invalid float abi!");
1901     CmdArgs.push_back("-mfloat-abi");
1902     CmdArgs.push_back("hard");
1903   }
1904 
1905   if (Arg *A = Args.getLastArg(options::OPT_mldc1_sdc1,
1906                                options::OPT_mno_ldc1_sdc1)) {
1907     if (A->getOption().matches(options::OPT_mno_ldc1_sdc1)) {
1908       CmdArgs.push_back("-mllvm");
1909       CmdArgs.push_back("-mno-ldc1-sdc1");
1910     }
1911   }
1912 
1913   if (Arg *A = Args.getLastArg(options::OPT_mcheck_zero_division,
1914                                options::OPT_mno_check_zero_division)) {
1915     if (A->getOption().matches(options::OPT_mno_check_zero_division)) {
1916       CmdArgs.push_back("-mllvm");
1917       CmdArgs.push_back("-mno-check-zero-division");
1918     }
1919   }
1920 
1921   if (Args.getLastArg(options::OPT_mfix4300)) {
1922     CmdArgs.push_back("-mllvm");
1923     CmdArgs.push_back("-mfix4300");
1924   }
1925 
1926   if (Arg *A = Args.getLastArg(options::OPT_G)) {
1927     StringRef v = A->getValue();
1928     CmdArgs.push_back("-mllvm");
1929     CmdArgs.push_back(Args.MakeArgString("-mips-ssection-threshold=" + v));
1930     A->claim();
1931   }
1932 
1933   Arg *GPOpt = Args.getLastArg(options::OPT_mgpopt, options::OPT_mno_gpopt);
1934   Arg *ABICalls =
1935       Args.getLastArg(options::OPT_mabicalls, options::OPT_mno_abicalls);
1936 
1937   // -mabicalls is the default for many MIPS environments, even with -fno-pic.
1938   // -mgpopt is the default for static, -fno-pic environments but these two
1939   // options conflict. We want to be certain that -mno-abicalls -mgpopt is
1940   // the only case where -mllvm -mgpopt is passed.
1941   // NOTE: We need a warning here or in the backend to warn when -mgpopt is
1942   //       passed explicitly when compiling something with -mabicalls
1943   //       (implictly) in affect. Currently the warning is in the backend.
1944   //
1945   // When the ABI in use is  N64, we also need to determine the PIC mode that
1946   // is in use, as -fno-pic for N64 implies -mno-abicalls.
1947   bool NoABICalls =
1948       ABICalls && ABICalls->getOption().matches(options::OPT_mno_abicalls);
1949 
1950   llvm::Reloc::Model RelocationModel;
1951   unsigned PICLevel;
1952   bool IsPIE;
1953   std::tie(RelocationModel, PICLevel, IsPIE) =
1954       ParsePICArgs(getToolChain(), Args);
1955 
1956   NoABICalls = NoABICalls ||
1957                (RelocationModel == llvm::Reloc::Static && ABIName == "n64");
1958 
1959   bool WantGPOpt = GPOpt && GPOpt->getOption().matches(options::OPT_mgpopt);
1960   // We quietly ignore -mno-gpopt as the backend defaults to -mno-gpopt.
1961   if (NoABICalls && (!GPOpt || WantGPOpt)) {
1962     CmdArgs.push_back("-mllvm");
1963     CmdArgs.push_back("-mgpopt");
1964 
1965     Arg *LocalSData = Args.getLastArg(options::OPT_mlocal_sdata,
1966                                       options::OPT_mno_local_sdata);
1967     Arg *ExternSData = Args.getLastArg(options::OPT_mextern_sdata,
1968                                        options::OPT_mno_extern_sdata);
1969     Arg *EmbeddedData = Args.getLastArg(options::OPT_membedded_data,
1970                                         options::OPT_mno_embedded_data);
1971     if (LocalSData) {
1972       CmdArgs.push_back("-mllvm");
1973       if (LocalSData->getOption().matches(options::OPT_mlocal_sdata)) {
1974         CmdArgs.push_back("-mlocal-sdata=1");
1975       } else {
1976         CmdArgs.push_back("-mlocal-sdata=0");
1977       }
1978       LocalSData->claim();
1979     }
1980 
1981     if (ExternSData) {
1982       CmdArgs.push_back("-mllvm");
1983       if (ExternSData->getOption().matches(options::OPT_mextern_sdata)) {
1984         CmdArgs.push_back("-mextern-sdata=1");
1985       } else {
1986         CmdArgs.push_back("-mextern-sdata=0");
1987       }
1988       ExternSData->claim();
1989     }
1990 
1991     if (EmbeddedData) {
1992       CmdArgs.push_back("-mllvm");
1993       if (EmbeddedData->getOption().matches(options::OPT_membedded_data)) {
1994         CmdArgs.push_back("-membedded-data=1");
1995       } else {
1996         CmdArgs.push_back("-membedded-data=0");
1997       }
1998       EmbeddedData->claim();
1999     }
2000 
2001   } else if ((!ABICalls || (!NoABICalls && ABICalls)) && WantGPOpt)
2002     D.Diag(diag::warn_drv_unsupported_gpopt) << (ABICalls ? 0 : 1);
2003 
2004   if (GPOpt)
2005     GPOpt->claim();
2006 
2007   if (Arg *A = Args.getLastArg(options::OPT_mcompact_branches_EQ)) {
2008     StringRef Val = StringRef(A->getValue());
2009     if (mips::hasCompactBranches(CPUName)) {
2010       if (Val == "never" || Val == "always" || Val == "optimal") {
2011         CmdArgs.push_back("-mllvm");
2012         CmdArgs.push_back(Args.MakeArgString("-mips-compact-branches=" + Val));
2013       } else
2014         D.Diag(diag::err_drv_unsupported_option_argument)
2015             << A->getSpelling() << Val;
2016     } else
2017       D.Diag(diag::warn_target_unsupported_compact_branches) << CPUName;
2018   }
2019 
2020   if (Arg *A = Args.getLastArg(options::OPT_mrelax_pic_calls,
2021                                options::OPT_mno_relax_pic_calls)) {
2022     if (A->getOption().matches(options::OPT_mno_relax_pic_calls)) {
2023       CmdArgs.push_back("-mllvm");
2024       CmdArgs.push_back("-mips-jalr-reloc=0");
2025     }
2026   }
2027 }
2028 
AddPPCTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2029 void Clang::AddPPCTargetArgs(const ArgList &Args,
2030                              ArgStringList &CmdArgs) const {
2031   const Driver &D = getToolChain().getDriver();
2032   const llvm::Triple &T = getToolChain().getTriple();
2033   if (Args.getLastArg(options::OPT_mtune_EQ)) {
2034     CmdArgs.push_back("-tune-cpu");
2035     std::string CPU = ppc::getPPCTuneCPU(Args, T);
2036     CmdArgs.push_back(Args.MakeArgString(CPU));
2037   }
2038 
2039   // Select the ABI to use.
2040   const char *ABIName = nullptr;
2041   if (T.isOSBinFormatELF()) {
2042     switch (getToolChain().getArch()) {
2043     case llvm::Triple::ppc64: {
2044       if (T.isPPC64ELFv2ABI())
2045         ABIName = "elfv2";
2046       else
2047         ABIName = "elfv1";
2048       break;
2049     }
2050     case llvm::Triple::ppc64le:
2051       ABIName = "elfv2";
2052       break;
2053     default:
2054       break;
2055     }
2056   }
2057 
2058   bool IEEELongDouble = getToolChain().defaultToIEEELongDouble();
2059   bool VecExtabi = false;
2060   for (const Arg *A : Args.filtered(options::OPT_mabi_EQ)) {
2061     StringRef V = A->getValue();
2062     if (V == "ieeelongdouble") {
2063       IEEELongDouble = true;
2064       A->claim();
2065     } else if (V == "ibmlongdouble") {
2066       IEEELongDouble = false;
2067       A->claim();
2068     } else if (V == "vec-default") {
2069       VecExtabi = false;
2070       A->claim();
2071     } else if (V == "vec-extabi") {
2072       VecExtabi = true;
2073       A->claim();
2074     } else if (V == "elfv1") {
2075       ABIName = "elfv1";
2076       A->claim();
2077     } else if (V == "elfv2") {
2078       ABIName = "elfv2";
2079       A->claim();
2080     } else if (V != "altivec")
2081       // The ppc64 linux abis are all "altivec" abis by default. Accept and ignore
2082       // the option if given as we don't have backend support for any targets
2083       // that don't use the altivec abi.
2084       ABIName = A->getValue();
2085   }
2086   if (IEEELongDouble)
2087     CmdArgs.push_back("-mabi=ieeelongdouble");
2088   if (VecExtabi) {
2089     if (!T.isOSAIX())
2090       D.Diag(diag::err_drv_unsupported_opt_for_target)
2091           << "-mabi=vec-extabi" << T.str();
2092     CmdArgs.push_back("-mabi=vec-extabi");
2093   }
2094 
2095   ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);
2096   if (FloatABI == ppc::FloatABI::Soft) {
2097     // Floating point operations and argument passing are soft.
2098     CmdArgs.push_back("-msoft-float");
2099     CmdArgs.push_back("-mfloat-abi");
2100     CmdArgs.push_back("soft");
2101   } else {
2102     // Floating point operations and argument passing are hard.
2103     assert(FloatABI == ppc::FloatABI::Hard && "Invalid float abi!");
2104     CmdArgs.push_back("-mfloat-abi");
2105     CmdArgs.push_back("hard");
2106   }
2107 
2108   if (ABIName) {
2109     CmdArgs.push_back("-target-abi");
2110     CmdArgs.push_back(ABIName);
2111   }
2112 }
2113 
SetRISCVSmallDataLimit(const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs)2114 static void SetRISCVSmallDataLimit(const ToolChain &TC, const ArgList &Args,
2115                                    ArgStringList &CmdArgs) {
2116   const Driver &D = TC.getDriver();
2117   const llvm::Triple &Triple = TC.getTriple();
2118   // Default small data limitation is eight.
2119   const char *SmallDataLimit = "8";
2120   // Get small data limitation.
2121   if (Args.getLastArg(options::OPT_shared, options::OPT_fpic,
2122                       options::OPT_fPIC)) {
2123     // Not support linker relaxation for PIC.
2124     SmallDataLimit = "0";
2125     if (Args.hasArg(options::OPT_G)) {
2126       D.Diag(diag::warn_drv_unsupported_sdata);
2127     }
2128   } else if (Args.getLastArgValue(options::OPT_mcmodel_EQ)
2129                  .equals_insensitive("large") &&
2130              (Triple.getArch() == llvm::Triple::riscv64)) {
2131     // Not support linker relaxation for RV64 with large code model.
2132     SmallDataLimit = "0";
2133     if (Args.hasArg(options::OPT_G)) {
2134       D.Diag(diag::warn_drv_unsupported_sdata);
2135     }
2136   } else if (Triple.isAndroid()) {
2137     // GP relaxation is not supported on Android.
2138     SmallDataLimit = "0";
2139     if (Args.hasArg(options::OPT_G)) {
2140       D.Diag(diag::warn_drv_unsupported_sdata);
2141     }
2142   } else if (Arg *A = Args.getLastArg(options::OPT_G)) {
2143     SmallDataLimit = A->getValue();
2144   }
2145   // Forward the -msmall-data-limit= option.
2146   CmdArgs.push_back("-msmall-data-limit");
2147   CmdArgs.push_back(SmallDataLimit);
2148 }
2149 
AddRISCVTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2150 void Clang::AddRISCVTargetArgs(const ArgList &Args,
2151                                ArgStringList &CmdArgs) const {
2152   const llvm::Triple &Triple = getToolChain().getTriple();
2153   StringRef ABIName = riscv::getRISCVABI(Args, Triple);
2154 
2155   CmdArgs.push_back("-target-abi");
2156   CmdArgs.push_back(ABIName.data());
2157 
2158   SetRISCVSmallDataLimit(getToolChain(), Args, CmdArgs);
2159 
2160   if (!Args.hasFlag(options::OPT_mimplicit_float,
2161                     options::OPT_mno_implicit_float, true))
2162     CmdArgs.push_back("-no-implicit-float");
2163 
2164   if (const Arg *A = Args.getLastArg(options::OPT_mtune_EQ)) {
2165     CmdArgs.push_back("-tune-cpu");
2166     if (strcmp(A->getValue(), "native") == 0)
2167       CmdArgs.push_back(Args.MakeArgString(llvm::sys::getHostCPUName()));
2168     else
2169       CmdArgs.push_back(A->getValue());
2170   }
2171 
2172   // Handle -mrvv-vector-bits=<bits>
2173   if (Arg *A = Args.getLastArg(options::OPT_mrvv_vector_bits_EQ)) {
2174     StringRef Val = A->getValue();
2175     const Driver &D = getToolChain().getDriver();
2176 
2177     // Get minimum VLen from march.
2178     unsigned MinVLen = 0;
2179     std::string Arch = riscv::getRISCVArch(Args, Triple);
2180     auto ISAInfo = llvm::RISCVISAInfo::parseArchString(
2181         Arch, /*EnableExperimentalExtensions*/ true);
2182     // Ignore parsing error.
2183     if (!errorToBool(ISAInfo.takeError()))
2184       MinVLen = (*ISAInfo)->getMinVLen();
2185 
2186     // If the value is "zvl", use MinVLen from march. Otherwise, try to parse
2187     // as integer as long as we have a MinVLen.
2188     unsigned Bits = 0;
2189     if (Val == "zvl" && MinVLen >= llvm::RISCV::RVVBitsPerBlock) {
2190       Bits = MinVLen;
2191     } else if (!Val.getAsInteger(10, Bits)) {
2192       // Only accept power of 2 values beteen RVVBitsPerBlock and 65536 that
2193       // at least MinVLen.
2194       if (Bits < MinVLen || Bits < llvm::RISCV::RVVBitsPerBlock ||
2195           Bits > 65536 || !llvm::isPowerOf2_32(Bits))
2196         Bits = 0;
2197     }
2198 
2199     // If we got a valid value try to use it.
2200     if (Bits != 0) {
2201       unsigned VScaleMin = Bits / llvm::RISCV::RVVBitsPerBlock;
2202       CmdArgs.push_back(
2203           Args.MakeArgString("-mvscale-max=" + llvm::Twine(VScaleMin)));
2204       CmdArgs.push_back(
2205           Args.MakeArgString("-mvscale-min=" + llvm::Twine(VScaleMin)));
2206     } else if (Val != "scalable") {
2207       // Handle the unsupported values passed to mrvv-vector-bits.
2208       D.Diag(diag::err_drv_unsupported_option_argument)
2209           << A->getSpelling() << Val;
2210     }
2211   }
2212 }
2213 
AddSparcTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2214 void Clang::AddSparcTargetArgs(const ArgList &Args,
2215                                ArgStringList &CmdArgs) const {
2216   sparc::FloatABI FloatABI =
2217       sparc::getSparcFloatABI(getToolChain().getDriver(), Args);
2218 
2219   if (FloatABI == sparc::FloatABI::Soft) {
2220     // Floating point operations and argument passing are soft.
2221     CmdArgs.push_back("-msoft-float");
2222     CmdArgs.push_back("-mfloat-abi");
2223     CmdArgs.push_back("soft");
2224   } else {
2225     // Floating point operations and argument passing are hard.
2226     assert(FloatABI == sparc::FloatABI::Hard && "Invalid float abi!");
2227     CmdArgs.push_back("-mfloat-abi");
2228     CmdArgs.push_back("hard");
2229   }
2230 
2231   if (const Arg *A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)) {
2232     StringRef Name = A->getValue();
2233     std::string TuneCPU;
2234     if (Name == "native")
2235       TuneCPU = std::string(llvm::sys::getHostCPUName());
2236     else
2237       TuneCPU = std::string(Name);
2238 
2239     CmdArgs.push_back("-tune-cpu");
2240     CmdArgs.push_back(Args.MakeArgString(TuneCPU));
2241   }
2242 }
2243 
AddSystemZTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2244 void Clang::AddSystemZTargetArgs(const ArgList &Args,
2245                                  ArgStringList &CmdArgs) const {
2246   if (const Arg *A = Args.getLastArg(options::OPT_mtune_EQ)) {
2247     CmdArgs.push_back("-tune-cpu");
2248     if (strcmp(A->getValue(), "native") == 0)
2249       CmdArgs.push_back(Args.MakeArgString(llvm::sys::getHostCPUName()));
2250     else
2251       CmdArgs.push_back(A->getValue());
2252   }
2253 
2254   bool HasBackchain =
2255       Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false);
2256   bool HasPackedStack = Args.hasFlag(options::OPT_mpacked_stack,
2257                                      options::OPT_mno_packed_stack, false);
2258   systemz::FloatABI FloatABI =
2259       systemz::getSystemZFloatABI(getToolChain().getDriver(), Args);
2260   bool HasSoftFloat = (FloatABI == systemz::FloatABI::Soft);
2261   if (HasBackchain && HasPackedStack && !HasSoftFloat) {
2262     const Driver &D = getToolChain().getDriver();
2263     D.Diag(diag::err_drv_unsupported_opt)
2264       << "-mpacked-stack -mbackchain -mhard-float";
2265   }
2266   if (HasBackchain)
2267     CmdArgs.push_back("-mbackchain");
2268   if (HasPackedStack)
2269     CmdArgs.push_back("-mpacked-stack");
2270   if (HasSoftFloat) {
2271     // Floating point operations and argument passing are soft.
2272     CmdArgs.push_back("-msoft-float");
2273     CmdArgs.push_back("-mfloat-abi");
2274     CmdArgs.push_back("soft");
2275   }
2276 }
2277 
AddX86TargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2278 void Clang::AddX86TargetArgs(const ArgList &Args,
2279                              ArgStringList &CmdArgs) const {
2280   const Driver &D = getToolChain().getDriver();
2281   addX86AlignBranchArgs(D, Args, CmdArgs, /*IsLTO=*/false);
2282 
2283   if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
2284       Args.hasArg(options::OPT_mkernel) ||
2285       Args.hasArg(options::OPT_fapple_kext))
2286     CmdArgs.push_back("-disable-red-zone");
2287 
2288   if (!Args.hasFlag(options::OPT_mtls_direct_seg_refs,
2289                     options::OPT_mno_tls_direct_seg_refs, true))
2290     CmdArgs.push_back("-mno-tls-direct-seg-refs");
2291 
2292   // Default to avoid implicit floating-point for kernel/kext code, but allow
2293   // that to be overridden with -mno-soft-float.
2294   bool NoImplicitFloat = (Args.hasArg(options::OPT_mkernel) ||
2295                           Args.hasArg(options::OPT_fapple_kext));
2296   if (Arg *A = Args.getLastArg(
2297           options::OPT_msoft_float, options::OPT_mno_soft_float,
2298           options::OPT_mimplicit_float, options::OPT_mno_implicit_float)) {
2299     const Option &O = A->getOption();
2300     NoImplicitFloat = (O.matches(options::OPT_mno_implicit_float) ||
2301                        O.matches(options::OPT_msoft_float));
2302   }
2303   if (NoImplicitFloat)
2304     CmdArgs.push_back("-no-implicit-float");
2305 
2306   if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
2307     StringRef Value = A->getValue();
2308     if (Value == "intel" || Value == "att") {
2309       CmdArgs.push_back("-mllvm");
2310       CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
2311       CmdArgs.push_back(Args.MakeArgString("-inline-asm=" + Value));
2312     } else {
2313       D.Diag(diag::err_drv_unsupported_option_argument)
2314           << A->getSpelling() << Value;
2315     }
2316   } else if (D.IsCLMode()) {
2317     CmdArgs.push_back("-mllvm");
2318     CmdArgs.push_back("-x86-asm-syntax=intel");
2319   }
2320 
2321   if (Arg *A = Args.getLastArg(options::OPT_mskip_rax_setup,
2322                                options::OPT_mno_skip_rax_setup))
2323     if (A->getOption().matches(options::OPT_mskip_rax_setup))
2324       CmdArgs.push_back(Args.MakeArgString("-mskip-rax-setup"));
2325 
2326   // Set flags to support MCU ABI.
2327   if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
2328     CmdArgs.push_back("-mfloat-abi");
2329     CmdArgs.push_back("soft");
2330     CmdArgs.push_back("-mstack-alignment=4");
2331   }
2332 
2333   // Handle -mtune.
2334 
2335   // Default to "generic" unless -march is present or targetting the PS4/PS5.
2336   std::string TuneCPU;
2337   if (!Args.hasArg(clang::driver::options::OPT_march_EQ) &&
2338       !getToolChain().getTriple().isPS())
2339     TuneCPU = "generic";
2340 
2341   // Override based on -mtune.
2342   if (const Arg *A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)) {
2343     StringRef Name = A->getValue();
2344 
2345     if (Name == "native") {
2346       Name = llvm::sys::getHostCPUName();
2347       if (!Name.empty())
2348         TuneCPU = std::string(Name);
2349     } else
2350       TuneCPU = std::string(Name);
2351   }
2352 
2353   if (!TuneCPU.empty()) {
2354     CmdArgs.push_back("-tune-cpu");
2355     CmdArgs.push_back(Args.MakeArgString(TuneCPU));
2356   }
2357 }
2358 
AddHexagonTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2359 void Clang::AddHexagonTargetArgs(const ArgList &Args,
2360                                  ArgStringList &CmdArgs) const {
2361   CmdArgs.push_back("-mqdsp6-compat");
2362   CmdArgs.push_back("-Wreturn-type");
2363 
2364   if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
2365     CmdArgs.push_back("-mllvm");
2366     CmdArgs.push_back(
2367         Args.MakeArgString("-hexagon-small-data-threshold=" + Twine(*G)));
2368   }
2369 
2370   if (!Args.hasArg(options::OPT_fno_short_enums))
2371     CmdArgs.push_back("-fshort-enums");
2372   if (Args.getLastArg(options::OPT_mieee_rnd_near)) {
2373     CmdArgs.push_back("-mllvm");
2374     CmdArgs.push_back("-enable-hexagon-ieee-rnd-near");
2375   }
2376   CmdArgs.push_back("-mllvm");
2377   CmdArgs.push_back("-machine-sink-split=0");
2378 }
2379 
AddLanaiTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2380 void Clang::AddLanaiTargetArgs(const ArgList &Args,
2381                                ArgStringList &CmdArgs) const {
2382   if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
2383     StringRef CPUName = A->getValue();
2384 
2385     CmdArgs.push_back("-target-cpu");
2386     CmdArgs.push_back(Args.MakeArgString(CPUName));
2387   }
2388   if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
2389     StringRef Value = A->getValue();
2390     // Only support mregparm=4 to support old usage. Report error for all other
2391     // cases.
2392     int Mregparm;
2393     if (Value.getAsInteger(10, Mregparm)) {
2394       if (Mregparm != 4) {
2395         getToolChain().getDriver().Diag(
2396             diag::err_drv_unsupported_option_argument)
2397             << A->getSpelling() << Value;
2398       }
2399     }
2400   }
2401 }
2402 
AddWebAssemblyTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2403 void Clang::AddWebAssemblyTargetArgs(const ArgList &Args,
2404                                      ArgStringList &CmdArgs) const {
2405   // Default to "hidden" visibility.
2406   if (!Args.hasArg(options::OPT_fvisibility_EQ,
2407                    options::OPT_fvisibility_ms_compat))
2408     CmdArgs.push_back("-fvisibility=hidden");
2409 }
2410 
AddVETargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const2411 void Clang::AddVETargetArgs(const ArgList &Args, ArgStringList &CmdArgs) const {
2412   // Floating point operations and argument passing are hard.
2413   CmdArgs.push_back("-mfloat-abi");
2414   CmdArgs.push_back("hard");
2415 }
2416 
DumpCompilationDatabase(Compilation & C,StringRef Filename,StringRef Target,const InputInfo & Output,const InputInfo & Input,const ArgList & Args) const2417 void Clang::DumpCompilationDatabase(Compilation &C, StringRef Filename,
2418                                     StringRef Target, const InputInfo &Output,
2419                                     const InputInfo &Input, const ArgList &Args) const {
2420   // If this is a dry run, do not create the compilation database file.
2421   if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
2422     return;
2423 
2424   using llvm::yaml::escape;
2425   const Driver &D = getToolChain().getDriver();
2426 
2427   if (!CompilationDatabase) {
2428     std::error_code EC;
2429     auto File = std::make_unique<llvm::raw_fd_ostream>(
2430         Filename, EC,
2431         llvm::sys::fs::OF_TextWithCRLF | llvm::sys::fs::OF_Append);
2432     if (EC) {
2433       D.Diag(clang::diag::err_drv_compilationdatabase) << Filename
2434                                                        << EC.message();
2435       return;
2436     }
2437     CompilationDatabase = std::move(File);
2438   }
2439   auto &CDB = *CompilationDatabase;
2440   auto CWD = D.getVFS().getCurrentWorkingDirectory();
2441   if (!CWD)
2442     CWD = ".";
2443   CDB << "{ \"directory\": \"" << escape(*CWD) << "\"";
2444   CDB << ", \"file\": \"" << escape(Input.getFilename()) << "\"";
2445   if (Output.isFilename())
2446     CDB << ", \"output\": \"" << escape(Output.getFilename()) << "\"";
2447   CDB << ", \"arguments\": [\"" << escape(D.ClangExecutable) << "\"";
2448   SmallString<128> Buf;
2449   Buf = "-x";
2450   Buf += types::getTypeName(Input.getType());
2451   CDB << ", \"" << escape(Buf) << "\"";
2452   if (!D.SysRoot.empty() && !Args.hasArg(options::OPT__sysroot_EQ)) {
2453     Buf = "--sysroot=";
2454     Buf += D.SysRoot;
2455     CDB << ", \"" << escape(Buf) << "\"";
2456   }
2457   CDB << ", \"" << escape(Input.getFilename()) << "\"";
2458   if (Output.isFilename())
2459     CDB << ", \"-o\", \"" << escape(Output.getFilename()) << "\"";
2460   for (auto &A: Args) {
2461     auto &O = A->getOption();
2462     // Skip language selection, which is positional.
2463     if (O.getID() == options::OPT_x)
2464       continue;
2465     // Skip writing dependency output and the compilation database itself.
2466     if (O.getGroup().isValid() && O.getGroup().getID() == options::OPT_M_Group)
2467       continue;
2468     if (O.getID() == options::OPT_gen_cdb_fragment_path)
2469       continue;
2470     // Skip inputs.
2471     if (O.getKind() == Option::InputClass)
2472       continue;
2473     // Skip output.
2474     if (O.getID() == options::OPT_o)
2475       continue;
2476     // All other arguments are quoted and appended.
2477     ArgStringList ASL;
2478     A->render(Args, ASL);
2479     for (auto &it: ASL)
2480       CDB << ", \"" << escape(it) << "\"";
2481   }
2482   Buf = "--target=";
2483   Buf += Target;
2484   CDB << ", \"" << escape(Buf) << "\"]},\n";
2485 }
2486 
DumpCompilationDatabaseFragmentToDir(StringRef Dir,Compilation & C,StringRef Target,const InputInfo & Output,const InputInfo & Input,const llvm::opt::ArgList & Args) const2487 void Clang::DumpCompilationDatabaseFragmentToDir(
2488     StringRef Dir, Compilation &C, StringRef Target, const InputInfo &Output,
2489     const InputInfo &Input, const llvm::opt::ArgList &Args) const {
2490   // If this is a dry run, do not create the compilation database file.
2491   if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
2492     return;
2493 
2494   if (CompilationDatabase)
2495     DumpCompilationDatabase(C, "", Target, Output, Input, Args);
2496 
2497   SmallString<256> Path = Dir;
2498   const auto &Driver = C.getDriver();
2499   Driver.getVFS().makeAbsolute(Path);
2500   auto Err = llvm::sys::fs::create_directory(Path, /*IgnoreExisting=*/true);
2501   if (Err) {
2502     Driver.Diag(diag::err_drv_compilationdatabase) << Dir << Err.message();
2503     return;
2504   }
2505 
2506   llvm::sys::path::append(
2507       Path,
2508       Twine(llvm::sys::path::filename(Input.getFilename())) + ".%%%%.json");
2509   int FD;
2510   SmallString<256> TempPath;
2511   Err = llvm::sys::fs::createUniqueFile(Path, FD, TempPath,
2512                                         llvm::sys::fs::OF_Text);
2513   if (Err) {
2514     Driver.Diag(diag::err_drv_compilationdatabase) << Path << Err.message();
2515     return;
2516   }
2517   CompilationDatabase =
2518       std::make_unique<llvm::raw_fd_ostream>(FD, /*shouldClose=*/true);
2519   DumpCompilationDatabase(C, "", Target, Output, Input, Args);
2520 }
2521 
CheckARMImplicitITArg(StringRef Value)2522 static bool CheckARMImplicitITArg(StringRef Value) {
2523   return Value == "always" || Value == "never" || Value == "arm" ||
2524          Value == "thumb";
2525 }
2526 
AddARMImplicitITArgs(const ArgList & Args,ArgStringList & CmdArgs,StringRef Value)2527 static void AddARMImplicitITArgs(const ArgList &Args, ArgStringList &CmdArgs,
2528                                  StringRef Value) {
2529   CmdArgs.push_back("-mllvm");
2530   CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
2531 }
2532 
CollectArgsForIntegratedAssembler(Compilation & C,const ArgList & Args,ArgStringList & CmdArgs,const Driver & D)2533 static void CollectArgsForIntegratedAssembler(Compilation &C,
2534                                               const ArgList &Args,
2535                                               ArgStringList &CmdArgs,
2536                                               const Driver &D) {
2537   // Default to -mno-relax-all.
2538   //
2539   // Note: RISC-V requires an indirect jump for offsets larger than 1MiB. This
2540   // cannot be done by assembler branch relaxation as it needs a free temporary
2541   // register. Because of this, branch relaxation is handled by a MachineIR pass
2542   // before the assembler. Forcing assembler branch relaxation for -O0 makes the
2543   // MachineIR branch relaxation inaccurate and it will miss cases where an
2544   // indirect branch is necessary.
2545   Args.addOptInFlag(CmdArgs, options::OPT_mrelax_all,
2546                     options::OPT_mno_relax_all);
2547 
2548   // Only default to -mincremental-linker-compatible if we think we are
2549   // targeting the MSVC linker.
2550   bool DefaultIncrementalLinkerCompatible =
2551       C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment();
2552   if (Args.hasFlag(options::OPT_mincremental_linker_compatible,
2553                    options::OPT_mno_incremental_linker_compatible,
2554                    DefaultIncrementalLinkerCompatible))
2555     CmdArgs.push_back("-mincremental-linker-compatible");
2556 
2557   Args.AddLastArg(CmdArgs, options::OPT_femit_dwarf_unwind_EQ);
2558 
2559   Args.addOptInFlag(CmdArgs, options::OPT_femit_compact_unwind_non_canonical,
2560                     options::OPT_fno_emit_compact_unwind_non_canonical);
2561 
2562   // If you add more args here, also add them to the block below that
2563   // starts with "// If CollectArgsForIntegratedAssembler() isn't called below".
2564 
2565   // When passing -I arguments to the assembler we sometimes need to
2566   // unconditionally take the next argument.  For example, when parsing
2567   // '-Wa,-I -Wa,foo' we need to accept the -Wa,foo arg after seeing the
2568   // -Wa,-I arg and when parsing '-Wa,-I,foo' we need to accept the 'foo'
2569   // arg after parsing the '-I' arg.
2570   bool TakeNextArg = false;
2571 
2572   const llvm::Triple &Triple = C.getDefaultToolChain().getTriple();
2573   bool Crel = false, ExperimentalCrel = false;
2574   bool UseRelaxRelocations = C.getDefaultToolChain().useRelaxRelocations();
2575   bool UseNoExecStack = false;
2576   const char *MipsTargetFeature = nullptr;
2577   StringRef ImplicitIt;
2578   for (const Arg *A :
2579        Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler,
2580                      options::OPT_mimplicit_it_EQ)) {
2581     A->claim();
2582 
2583     if (A->getOption().getID() == options::OPT_mimplicit_it_EQ) {
2584       switch (C.getDefaultToolChain().getArch()) {
2585       case llvm::Triple::arm:
2586       case llvm::Triple::armeb:
2587       case llvm::Triple::thumb:
2588       case llvm::Triple::thumbeb:
2589         // Only store the value; the last value set takes effect.
2590         ImplicitIt = A->getValue();
2591         if (!CheckARMImplicitITArg(ImplicitIt))
2592           D.Diag(diag::err_drv_unsupported_option_argument)
2593               << A->getSpelling() << ImplicitIt;
2594         continue;
2595       default:
2596         break;
2597       }
2598     }
2599 
2600     for (StringRef Value : A->getValues()) {
2601       if (TakeNextArg) {
2602         CmdArgs.push_back(Value.data());
2603         TakeNextArg = false;
2604         continue;
2605       }
2606 
2607       if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
2608           Value == "-mbig-obj")
2609         continue; // LLVM handles bigobj automatically
2610 
2611       switch (C.getDefaultToolChain().getArch()) {
2612       default:
2613         break;
2614       case llvm::Triple::x86:
2615       case llvm::Triple::x86_64:
2616         if (Value == "-msse2avx") {
2617           CmdArgs.push_back("-msse2avx");
2618           continue;
2619         }
2620         break;
2621       case llvm::Triple::wasm32:
2622       case llvm::Triple::wasm64:
2623         if (Value == "--no-type-check") {
2624           CmdArgs.push_back("-mno-type-check");
2625           continue;
2626         }
2627         break;
2628       case llvm::Triple::thumb:
2629       case llvm::Triple::thumbeb:
2630       case llvm::Triple::arm:
2631       case llvm::Triple::armeb:
2632         if (Value.starts_with("-mimplicit-it=")) {
2633           // Only store the value; the last value set takes effect.
2634           ImplicitIt = Value.split("=").second;
2635           if (CheckARMImplicitITArg(ImplicitIt))
2636             continue;
2637         }
2638         if (Value == "-mthumb")
2639           // -mthumb has already been processed in ComputeLLVMTriple()
2640           // recognize but skip over here.
2641           continue;
2642         break;
2643       case llvm::Triple::mips:
2644       case llvm::Triple::mipsel:
2645       case llvm::Triple::mips64:
2646       case llvm::Triple::mips64el:
2647         if (Value == "--trap") {
2648           CmdArgs.push_back("-target-feature");
2649           CmdArgs.push_back("+use-tcc-in-div");
2650           continue;
2651         }
2652         if (Value == "--break") {
2653           CmdArgs.push_back("-target-feature");
2654           CmdArgs.push_back("-use-tcc-in-div");
2655           continue;
2656         }
2657         if (Value.starts_with("-msoft-float")) {
2658           CmdArgs.push_back("-target-feature");
2659           CmdArgs.push_back("+soft-float");
2660           continue;
2661         }
2662         if (Value.starts_with("-mhard-float")) {
2663           CmdArgs.push_back("-target-feature");
2664           CmdArgs.push_back("-soft-float");
2665           continue;
2666         }
2667 
2668         MipsTargetFeature = llvm::StringSwitch<const char *>(Value)
2669                                 .Case("-mips1", "+mips1")
2670                                 .Case("-mips2", "+mips2")
2671                                 .Case("-mips3", "+mips3")
2672                                 .Case("-mips4", "+mips4")
2673                                 .Case("-mips5", "+mips5")
2674                                 .Case("-mips32", "+mips32")
2675                                 .Case("-mips32r2", "+mips32r2")
2676                                 .Case("-mips32r3", "+mips32r3")
2677                                 .Case("-mips32r5", "+mips32r5")
2678                                 .Case("-mips32r6", "+mips32r6")
2679                                 .Case("-mips64", "+mips64")
2680                                 .Case("-mips64r2", "+mips64r2")
2681                                 .Case("-mips64r3", "+mips64r3")
2682                                 .Case("-mips64r5", "+mips64r5")
2683                                 .Case("-mips64r6", "+mips64r6")
2684                                 .Default(nullptr);
2685         if (MipsTargetFeature)
2686           continue;
2687       }
2688 
2689       if (Value == "-force_cpusubtype_ALL") {
2690         // Do nothing, this is the default and we don't support anything else.
2691       } else if (Value == "-L") {
2692         CmdArgs.push_back("-msave-temp-labels");
2693       } else if (Value == "--fatal-warnings") {
2694         CmdArgs.push_back("-massembler-fatal-warnings");
2695       } else if (Value == "--no-warn" || Value == "-W") {
2696         CmdArgs.push_back("-massembler-no-warn");
2697       } else if (Value == "--noexecstack") {
2698         UseNoExecStack = true;
2699       } else if (Value.starts_with("-compress-debug-sections") ||
2700                  Value.starts_with("--compress-debug-sections") ||
2701                  Value == "-nocompress-debug-sections" ||
2702                  Value == "--nocompress-debug-sections") {
2703         CmdArgs.push_back(Value.data());
2704       } else if (Value == "--crel") {
2705         Crel = true;
2706       } else if (Value == "--no-crel") {
2707         Crel = false;
2708       } else if (Value == "--allow-experimental-crel") {
2709         ExperimentalCrel = true;
2710       } else if (Value == "-mrelax-relocations=yes" ||
2711                  Value == "--mrelax-relocations=yes") {
2712         UseRelaxRelocations = true;
2713       } else if (Value == "-mrelax-relocations=no" ||
2714                  Value == "--mrelax-relocations=no") {
2715         UseRelaxRelocations = false;
2716       } else if (Value.starts_with("-I")) {
2717         CmdArgs.push_back(Value.data());
2718         // We need to consume the next argument if the current arg is a plain
2719         // -I. The next arg will be the include directory.
2720         if (Value == "-I")
2721           TakeNextArg = true;
2722       } else if (Value.starts_with("-gdwarf-")) {
2723         // "-gdwarf-N" options are not cc1as options.
2724         unsigned DwarfVersion = DwarfVersionNum(Value);
2725         if (DwarfVersion == 0) { // Send it onward, and let cc1as complain.
2726           CmdArgs.push_back(Value.data());
2727         } else {
2728           RenderDebugEnablingArgs(Args, CmdArgs,
2729                                   llvm::codegenoptions::DebugInfoConstructor,
2730                                   DwarfVersion, llvm::DebuggerKind::Default);
2731         }
2732       } else if (Value.starts_with("-mcpu") || Value.starts_with("-mfpu") ||
2733                  Value.starts_with("-mhwdiv") || Value.starts_with("-march")) {
2734         // Do nothing, we'll validate it later.
2735       } else if (Value == "-defsym" || Value == "--defsym") {
2736         if (A->getNumValues() != 2) {
2737           D.Diag(diag::err_drv_defsym_invalid_format) << Value;
2738           break;
2739         }
2740         const char *S = A->getValue(1);
2741         auto Pair = StringRef(S).split('=');
2742         auto Sym = Pair.first;
2743         auto SVal = Pair.second;
2744 
2745         if (Sym.empty() || SVal.empty()) {
2746           D.Diag(diag::err_drv_defsym_invalid_format) << S;
2747           break;
2748         }
2749         int64_t IVal;
2750         if (SVal.getAsInteger(0, IVal)) {
2751           D.Diag(diag::err_drv_defsym_invalid_symval) << SVal;
2752           break;
2753         }
2754         CmdArgs.push_back("--defsym");
2755         TakeNextArg = true;
2756       } else if (Value == "-fdebug-compilation-dir") {
2757         CmdArgs.push_back("-fdebug-compilation-dir");
2758         TakeNextArg = true;
2759       } else if (Value.consume_front("-fdebug-compilation-dir=")) {
2760         // The flag is a -Wa / -Xassembler argument and Options doesn't
2761         // parse the argument, so this isn't automatically aliased to
2762         // -fdebug-compilation-dir (without '=') here.
2763         CmdArgs.push_back("-fdebug-compilation-dir");
2764         CmdArgs.push_back(Value.data());
2765       } else if (Value == "--version") {
2766         D.PrintVersion(C, llvm::outs());
2767       } else {
2768         D.Diag(diag::err_drv_unsupported_option_argument)
2769             << A->getSpelling() << Value;
2770       }
2771     }
2772   }
2773   if (ImplicitIt.size())
2774     AddARMImplicitITArgs(Args, CmdArgs, ImplicitIt);
2775   if (Crel) {
2776     if (!ExperimentalCrel)
2777       D.Diag(diag::err_drv_experimental_crel);
2778     if (Triple.isOSBinFormatELF() && !Triple.isMIPS()) {
2779       CmdArgs.push_back("--crel");
2780     } else {
2781       D.Diag(diag::err_drv_unsupported_opt_for_target)
2782           << "-Wa,--crel" << D.getTargetTriple();
2783     }
2784   }
2785   if (!UseRelaxRelocations)
2786     CmdArgs.push_back("-mrelax-relocations=no");
2787   if (UseNoExecStack)
2788     CmdArgs.push_back("-mnoexecstack");
2789   if (MipsTargetFeature != nullptr) {
2790     CmdArgs.push_back("-target-feature");
2791     CmdArgs.push_back(MipsTargetFeature);
2792   }
2793 
2794   // forward -fembed-bitcode to assmebler
2795   if (C.getDriver().embedBitcodeEnabled() ||
2796       C.getDriver().embedBitcodeMarkerOnly())
2797     Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
2798 
2799   if (const char *AsSecureLogFile = getenv("AS_SECURE_LOG_FILE")) {
2800     CmdArgs.push_back("-as-secure-log-file");
2801     CmdArgs.push_back(Args.MakeArgString(AsSecureLogFile));
2802   }
2803 }
2804 
ComplexRangeKindToStr(LangOptions::ComplexRangeKind Range)2805 static std::string ComplexRangeKindToStr(LangOptions::ComplexRangeKind Range) {
2806   switch (Range) {
2807   case LangOptions::ComplexRangeKind::CX_Full:
2808     return "full";
2809     break;
2810   case LangOptions::ComplexRangeKind::CX_Basic:
2811     return "basic";
2812     break;
2813   case LangOptions::ComplexRangeKind::CX_Improved:
2814     return "improved";
2815     break;
2816   case LangOptions::ComplexRangeKind::CX_Promoted:
2817     return "promoted";
2818     break;
2819   default:
2820     return "";
2821   }
2822 }
2823 
ComplexArithmeticStr(LangOptions::ComplexRangeKind Range)2824 static std::string ComplexArithmeticStr(LangOptions::ComplexRangeKind Range) {
2825   return (Range == LangOptions::ComplexRangeKind::CX_None)
2826              ? ""
2827              : "-fcomplex-arithmetic=" + ComplexRangeKindToStr(Range);
2828 }
2829 
EmitComplexRangeDiag(const Driver & D,std::string str1,std::string str2)2830 static void EmitComplexRangeDiag(const Driver &D, std::string str1,
2831                                  std::string str2) {
2832   if ((str1.compare(str2) != 0) && !str2.empty() && !str1.empty()) {
2833     D.Diag(clang::diag::warn_drv_overriding_option) << str1 << str2;
2834   }
2835 }
2836 
2837 static std::string
RenderComplexRangeOption(LangOptions::ComplexRangeKind Range)2838 RenderComplexRangeOption(LangOptions::ComplexRangeKind Range) {
2839   std::string ComplexRangeStr = ComplexRangeKindToStr(Range);
2840   if (!ComplexRangeStr.empty())
2841     return "-complex-range=" + ComplexRangeStr;
2842   return ComplexRangeStr;
2843 }
2844 
RenderFloatingPointOptions(const ToolChain & TC,const Driver & D,bool OFastEnabled,const ArgList & Args,ArgStringList & CmdArgs,const JobAction & JA)2845 static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
2846                                        bool OFastEnabled, const ArgList &Args,
2847                                        ArgStringList &CmdArgs,
2848                                        const JobAction &JA) {
2849   // Handle various floating point optimization flags, mapping them to the
2850   // appropriate LLVM code generation flags. This is complicated by several
2851   // "umbrella" flags, so we do this by stepping through the flags incrementally
2852   // adjusting what we think is enabled/disabled, then at the end setting the
2853   // LLVM flags based on the final state.
2854   bool HonorINFs = true;
2855   bool HonorNaNs = true;
2856   bool ApproxFunc = false;
2857   // -fmath-errno is the default on some platforms, e.g. BSD-derived OSes.
2858   bool MathErrno = TC.IsMathErrnoDefault();
2859   bool AssociativeMath = false;
2860   bool ReciprocalMath = false;
2861   bool SignedZeros = true;
2862   bool TrappingMath = false; // Implemented via -ffp-exception-behavior
2863   bool TrappingMathPresent = false; // Is trapping-math in args, and not
2864                                     // overriden by ffp-exception-behavior?
2865   bool RoundingFPMath = false;
2866   // -ffp-model values: strict, fast, precise
2867   StringRef FPModel = "";
2868   // -ffp-exception-behavior options: strict, maytrap, ignore
2869   StringRef FPExceptionBehavior = "";
2870   // -ffp-eval-method options: double, extended, source
2871   StringRef FPEvalMethod = "";
2872   llvm::DenormalMode DenormalFPMath =
2873       TC.getDefaultDenormalModeForType(Args, JA);
2874   llvm::DenormalMode DenormalFP32Math =
2875       TC.getDefaultDenormalModeForType(Args, JA, &llvm::APFloat::IEEEsingle());
2876 
2877   // CUDA and HIP don't rely on the frontend to pass an ffp-contract option.
2878   // If one wasn't given by the user, don't pass it here.
2879   StringRef FPContract;
2880   StringRef LastSeenFfpContractOption;
2881   bool SeenUnsafeMathModeOption = false;
2882   if (!JA.isDeviceOffloading(Action::OFK_Cuda) &&
2883       !JA.isOffloading(Action::OFK_HIP))
2884     FPContract = "on";
2885   bool StrictFPModel = false;
2886   StringRef Float16ExcessPrecision = "";
2887   StringRef BFloat16ExcessPrecision = "";
2888   LangOptions::ComplexRangeKind Range = LangOptions::ComplexRangeKind::CX_None;
2889   std::string ComplexRangeStr = "";
2890   std::string GccRangeComplexOption = "";
2891 
2892   // Lambda to set fast-math options. This is also used by -ffp-model=fast
2893   auto applyFastMath = [&]() {
2894     HonorINFs = false;
2895     HonorNaNs = false;
2896     MathErrno = false;
2897     AssociativeMath = true;
2898     ReciprocalMath = true;
2899     ApproxFunc = true;
2900     SignedZeros = false;
2901     TrappingMath = false;
2902     RoundingFPMath = false;
2903     FPExceptionBehavior = "";
2904     // If fast-math is set then set the fp-contract mode to fast.
2905     FPContract = "fast";
2906     // ffast-math enables basic range rules for complex multiplication and
2907     // division.
2908     // Warn if user expects to perform full implementation of complex
2909     // multiplication or division in the presence of nan or ninf flags.
2910     if (Range == LangOptions::ComplexRangeKind::CX_Full ||
2911         Range == LangOptions::ComplexRangeKind::CX_Improved ||
2912         Range == LangOptions::ComplexRangeKind::CX_Promoted)
2913       EmitComplexRangeDiag(
2914           D, ComplexArithmeticStr(Range),
2915           !GccRangeComplexOption.empty()
2916               ? GccRangeComplexOption
2917               : ComplexArithmeticStr(LangOptions::ComplexRangeKind::CX_Basic));
2918     Range = LangOptions::ComplexRangeKind::CX_Basic;
2919     SeenUnsafeMathModeOption = true;
2920   };
2921 
2922   if (const Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) {
2923     CmdArgs.push_back("-mlimit-float-precision");
2924     CmdArgs.push_back(A->getValue());
2925   }
2926 
2927   for (const Arg *A : Args) {
2928     switch (A->getOption().getID()) {
2929     // If this isn't an FP option skip the claim below
2930     default: continue;
2931 
2932     case options::OPT_fcx_limited_range:
2933       if (GccRangeComplexOption.empty()) {
2934         if (Range != LangOptions::ComplexRangeKind::CX_Basic)
2935           EmitComplexRangeDiag(D, RenderComplexRangeOption(Range),
2936                                "-fcx-limited-range");
2937       } else {
2938         if (GccRangeComplexOption != "-fno-cx-limited-range")
2939           EmitComplexRangeDiag(D, GccRangeComplexOption, "-fcx-limited-range");
2940       }
2941       GccRangeComplexOption = "-fcx-limited-range";
2942       Range = LangOptions::ComplexRangeKind::CX_Basic;
2943       break;
2944     case options::OPT_fno_cx_limited_range:
2945       if (GccRangeComplexOption.empty()) {
2946         EmitComplexRangeDiag(D, RenderComplexRangeOption(Range),
2947                              "-fno-cx-limited-range");
2948       } else {
2949         if (GccRangeComplexOption.compare("-fcx-limited-range") != 0 &&
2950             GccRangeComplexOption.compare("-fno-cx-fortran-rules") != 0)
2951           EmitComplexRangeDiag(D, GccRangeComplexOption,
2952                                "-fno-cx-limited-range");
2953       }
2954       GccRangeComplexOption = "-fno-cx-limited-range";
2955       Range = LangOptions::ComplexRangeKind::CX_Full;
2956       break;
2957     case options::OPT_fcx_fortran_rules:
2958       if (GccRangeComplexOption.empty())
2959         EmitComplexRangeDiag(D, RenderComplexRangeOption(Range),
2960                              "-fcx-fortran-rules");
2961       else
2962         EmitComplexRangeDiag(D, GccRangeComplexOption, "-fcx-fortran-rules");
2963       GccRangeComplexOption = "-fcx-fortran-rules";
2964       Range = LangOptions::ComplexRangeKind::CX_Improved;
2965       break;
2966     case options::OPT_fno_cx_fortran_rules:
2967       if (GccRangeComplexOption.empty()) {
2968         EmitComplexRangeDiag(D, RenderComplexRangeOption(Range),
2969                              "-fno-cx-fortran-rules");
2970       } else {
2971         if (GccRangeComplexOption != "-fno-cx-limited-range")
2972           EmitComplexRangeDiag(D, GccRangeComplexOption,
2973                                "-fno-cx-fortran-rules");
2974       }
2975       GccRangeComplexOption = "-fno-cx-fortran-rules";
2976       Range = LangOptions::ComplexRangeKind::CX_Full;
2977       break;
2978     case options::OPT_fcomplex_arithmetic_EQ: {
2979       LangOptions::ComplexRangeKind RangeVal;
2980       StringRef Val = A->getValue();
2981       if (Val == "full")
2982         RangeVal = LangOptions::ComplexRangeKind::CX_Full;
2983       else if (Val == "improved")
2984         RangeVal = LangOptions::ComplexRangeKind::CX_Improved;
2985       else if (Val == "promoted")
2986         RangeVal = LangOptions::ComplexRangeKind::CX_Promoted;
2987       else if (Val == "basic")
2988         RangeVal = LangOptions::ComplexRangeKind::CX_Basic;
2989       else {
2990         D.Diag(diag::err_drv_unsupported_option_argument)
2991             << A->getSpelling() << Val;
2992         break;
2993       }
2994       if (!GccRangeComplexOption.empty()) {
2995         if (GccRangeComplexOption.compare("-fcx-limited-range") != 0) {
2996           if (GccRangeComplexOption.compare("-fcx-fortran-rules") != 0) {
2997             if (RangeVal != LangOptions::ComplexRangeKind::CX_Improved)
2998               EmitComplexRangeDiag(D, GccRangeComplexOption,
2999                                    ComplexArithmeticStr(RangeVal));
3000           } else {
3001             EmitComplexRangeDiag(D, GccRangeComplexOption,
3002                                  ComplexArithmeticStr(RangeVal));
3003           }
3004         } else {
3005           if (RangeVal != LangOptions::ComplexRangeKind::CX_Basic)
3006             EmitComplexRangeDiag(D, GccRangeComplexOption,
3007                                  ComplexArithmeticStr(RangeVal));
3008         }
3009       }
3010       Range = RangeVal;
3011       break;
3012     }
3013     case options::OPT_ffp_model_EQ: {
3014       // If -ffp-model= is seen, reset to fno-fast-math
3015       HonorINFs = true;
3016       HonorNaNs = true;
3017       ApproxFunc = false;
3018       // Turning *off* -ffast-math restores the toolchain default.
3019       MathErrno = TC.IsMathErrnoDefault();
3020       AssociativeMath = false;
3021       ReciprocalMath = false;
3022       SignedZeros = true;
3023       FPContract = "on";
3024 
3025       StringRef Val = A->getValue();
3026       if (OFastEnabled && Val != "fast") {
3027         // Only -ffp-model=fast is compatible with OFast, ignore.
3028         D.Diag(clang::diag::warn_drv_overriding_option)
3029             << Args.MakeArgString("-ffp-model=" + Val) << "-Ofast";
3030         break;
3031       }
3032       StrictFPModel = false;
3033       if (!FPModel.empty() && FPModel != Val)
3034         D.Diag(clang::diag::warn_drv_overriding_option)
3035             << Args.MakeArgString("-ffp-model=" + FPModel)
3036             << Args.MakeArgString("-ffp-model=" + Val);
3037       if (Val == "fast") {
3038         FPModel = Val;
3039         applyFastMath();
3040       } else if (Val == "precise") {
3041         FPModel = Val;
3042         FPContract = "on";
3043       } else if (Val == "strict") {
3044         StrictFPModel = true;
3045         FPExceptionBehavior = "strict";
3046         FPModel = Val;
3047         FPContract = "off";
3048         TrappingMath = true;
3049         RoundingFPMath = true;
3050       } else
3051         D.Diag(diag::err_drv_unsupported_option_argument)
3052             << A->getSpelling() << Val;
3053       break;
3054     }
3055 
3056     // Options controlling individual features
3057     case options::OPT_fhonor_infinities:    HonorINFs = true;         break;
3058     case options::OPT_fno_honor_infinities: HonorINFs = false;        break;
3059     case options::OPT_fhonor_nans:          HonorNaNs = true;         break;
3060     case options::OPT_fno_honor_nans:       HonorNaNs = false;        break;
3061     case options::OPT_fapprox_func:         ApproxFunc = true;        break;
3062     case options::OPT_fno_approx_func:      ApproxFunc = false;       break;
3063     case options::OPT_fmath_errno:          MathErrno = true;         break;
3064     case options::OPT_fno_math_errno:       MathErrno = false;        break;
3065     case options::OPT_fassociative_math:    AssociativeMath = true;   break;
3066     case options::OPT_fno_associative_math: AssociativeMath = false;  break;
3067     case options::OPT_freciprocal_math:     ReciprocalMath = true;    break;
3068     case options::OPT_fno_reciprocal_math:  ReciprocalMath = false;   break;
3069     case options::OPT_fsigned_zeros:        SignedZeros = true;       break;
3070     case options::OPT_fno_signed_zeros:     SignedZeros = false;      break;
3071     case options::OPT_ftrapping_math:
3072       if (!TrappingMathPresent && !FPExceptionBehavior.empty() &&
3073           FPExceptionBehavior != "strict")
3074         // Warn that previous value of option is overridden.
3075         D.Diag(clang::diag::warn_drv_overriding_option)
3076             << Args.MakeArgString("-ffp-exception-behavior=" +
3077                                   FPExceptionBehavior)
3078             << "-ftrapping-math";
3079       TrappingMath = true;
3080       TrappingMathPresent = true;
3081       FPExceptionBehavior = "strict";
3082       break;
3083     case options::OPT_fno_trapping_math:
3084       if (!TrappingMathPresent && !FPExceptionBehavior.empty() &&
3085           FPExceptionBehavior != "ignore")
3086         // Warn that previous value of option is overridden.
3087         D.Diag(clang::diag::warn_drv_overriding_option)
3088             << Args.MakeArgString("-ffp-exception-behavior=" +
3089                                   FPExceptionBehavior)
3090             << "-fno-trapping-math";
3091       TrappingMath = false;
3092       TrappingMathPresent = true;
3093       FPExceptionBehavior = "ignore";
3094       break;
3095 
3096     case options::OPT_frounding_math:
3097       RoundingFPMath = true;
3098       break;
3099 
3100     case options::OPT_fno_rounding_math:
3101       RoundingFPMath = false;
3102       break;
3103 
3104     case options::OPT_fdenormal_fp_math_EQ:
3105       DenormalFPMath = llvm::parseDenormalFPAttribute(A->getValue());
3106       DenormalFP32Math = DenormalFPMath;
3107       if (!DenormalFPMath.isValid()) {
3108         D.Diag(diag::err_drv_invalid_value)
3109             << A->getAsString(Args) << A->getValue();
3110       }
3111       break;
3112 
3113     case options::OPT_fdenormal_fp_math_f32_EQ:
3114       DenormalFP32Math = llvm::parseDenormalFPAttribute(A->getValue());
3115       if (!DenormalFP32Math.isValid()) {
3116         D.Diag(diag::err_drv_invalid_value)
3117             << A->getAsString(Args) << A->getValue();
3118       }
3119       break;
3120 
3121     // Validate and pass through -ffp-contract option.
3122     case options::OPT_ffp_contract: {
3123       StringRef Val = A->getValue();
3124       if (Val == "fast" || Val == "on" || Val == "off" ||
3125           Val == "fast-honor-pragmas") {
3126         FPContract = Val;
3127         LastSeenFfpContractOption = Val;
3128       } else
3129         D.Diag(diag::err_drv_unsupported_option_argument)
3130             << A->getSpelling() << Val;
3131       break;
3132     }
3133 
3134     // Validate and pass through -ffp-exception-behavior option.
3135     case options::OPT_ffp_exception_behavior_EQ: {
3136       StringRef Val = A->getValue();
3137       if (!TrappingMathPresent && !FPExceptionBehavior.empty() &&
3138           FPExceptionBehavior != Val)
3139         // Warn that previous value of option is overridden.
3140         D.Diag(clang::diag::warn_drv_overriding_option)
3141             << Args.MakeArgString("-ffp-exception-behavior=" +
3142                                   FPExceptionBehavior)
3143             << Args.MakeArgString("-ffp-exception-behavior=" + Val);
3144       TrappingMath = TrappingMathPresent = false;
3145       if (Val == "ignore" || Val == "maytrap")
3146         FPExceptionBehavior = Val;
3147       else if (Val == "strict") {
3148         FPExceptionBehavior = Val;
3149         TrappingMath = TrappingMathPresent = true;
3150       } else
3151         D.Diag(diag::err_drv_unsupported_option_argument)
3152             << A->getSpelling() << Val;
3153       break;
3154     }
3155 
3156     // Validate and pass through -ffp-eval-method option.
3157     case options::OPT_ffp_eval_method_EQ: {
3158       StringRef Val = A->getValue();
3159       if (Val == "double" || Val == "extended" || Val == "source")
3160         FPEvalMethod = Val;
3161       else
3162         D.Diag(diag::err_drv_unsupported_option_argument)
3163             << A->getSpelling() << Val;
3164       break;
3165     }
3166 
3167     case options::OPT_fexcess_precision_EQ: {
3168       StringRef Val = A->getValue();
3169       const llvm::Triple::ArchType Arch = TC.getArch();
3170       if (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64) {
3171         if (Val == "standard" || Val == "fast")
3172           Float16ExcessPrecision = Val;
3173         // To make it GCC compatible, allow the value of "16" which
3174         // means disable excess precision, the same meaning than clang's
3175         // equivalent value "none".
3176         else if (Val == "16")
3177           Float16ExcessPrecision = "none";
3178         else
3179           D.Diag(diag::err_drv_unsupported_option_argument)
3180               << A->getSpelling() << Val;
3181       } else {
3182         if (!(Val == "standard" || Val == "fast"))
3183           D.Diag(diag::err_drv_unsupported_option_argument)
3184               << A->getSpelling() << Val;
3185       }
3186       BFloat16ExcessPrecision = Float16ExcessPrecision;
3187       break;
3188     }
3189     case options::OPT_ffinite_math_only:
3190       HonorINFs = false;
3191       HonorNaNs = false;
3192       break;
3193     case options::OPT_fno_finite_math_only:
3194       HonorINFs = true;
3195       HonorNaNs = true;
3196       break;
3197 
3198     case options::OPT_funsafe_math_optimizations:
3199       AssociativeMath = true;
3200       ReciprocalMath = true;
3201       SignedZeros = false;
3202       ApproxFunc = true;
3203       TrappingMath = false;
3204       FPExceptionBehavior = "";
3205       FPContract = "fast";
3206       SeenUnsafeMathModeOption = true;
3207       break;
3208     case options::OPT_fno_unsafe_math_optimizations:
3209       AssociativeMath = false;
3210       ReciprocalMath = false;
3211       SignedZeros = true;
3212       ApproxFunc = false;
3213 
3214       if (!JA.isDeviceOffloading(Action::OFK_Cuda) &&
3215           !JA.isOffloading(Action::OFK_HIP)) {
3216         if (LastSeenFfpContractOption != "") {
3217           FPContract = LastSeenFfpContractOption;
3218         } else if (SeenUnsafeMathModeOption)
3219           FPContract = "on";
3220       }
3221       break;
3222 
3223     case options::OPT_Ofast:
3224       // If -Ofast is the optimization level, then -ffast-math should be enabled
3225       if (!OFastEnabled)
3226         continue;
3227       [[fallthrough]];
3228     case options::OPT_ffast_math: {
3229       applyFastMath();
3230       break;
3231     }
3232     case options::OPT_fno_fast_math:
3233       HonorINFs = true;
3234       HonorNaNs = true;
3235       // Turning on -ffast-math (with either flag) removes the need for
3236       // MathErrno. However, turning *off* -ffast-math merely restores the
3237       // toolchain default (which may be false).
3238       MathErrno = TC.IsMathErrnoDefault();
3239       AssociativeMath = false;
3240       ReciprocalMath = false;
3241       ApproxFunc = false;
3242       SignedZeros = true;
3243       // -fno_fast_math restores default fpcontract handling
3244       if (!JA.isDeviceOffloading(Action::OFK_Cuda) &&
3245           !JA.isOffloading(Action::OFK_HIP)) {
3246         if (LastSeenFfpContractOption != "") {
3247           FPContract = LastSeenFfpContractOption;
3248         } else if (SeenUnsafeMathModeOption)
3249           FPContract = "on";
3250       }
3251       break;
3252     }
3253     // The StrictFPModel local variable is needed to report warnings
3254     // in the way we intend. If -ffp-model=strict has been used, we
3255     // want to report a warning for the next option encountered that
3256     // takes us out of the settings described by fp-model=strict, but
3257     // we don't want to continue issuing warnings for other conflicting
3258     // options after that.
3259     if (StrictFPModel) {
3260       // If -ffp-model=strict has been specified on command line but
3261       // subsequent options conflict then emit warning diagnostic.
3262       if (HonorINFs && HonorNaNs && !AssociativeMath && !ReciprocalMath &&
3263           SignedZeros && TrappingMath && RoundingFPMath && !ApproxFunc &&
3264           FPContract == "off")
3265         // OK: Current Arg doesn't conflict with -ffp-model=strict
3266         ;
3267       else {
3268         StrictFPModel = false;
3269         FPModel = "";
3270         auto RHS = (A->getNumValues() == 0)
3271                        ? A->getSpelling()
3272                        : Args.MakeArgString(A->getSpelling() + A->getValue());
3273         if (RHS != "-ffp-model=strict")
3274           D.Diag(clang::diag::warn_drv_overriding_option)
3275               << "-ffp-model=strict" << RHS;
3276       }
3277     }
3278 
3279     // If we handled this option claim it
3280     A->claim();
3281   }
3282 
3283   if (!HonorINFs)
3284     CmdArgs.push_back("-menable-no-infs");
3285 
3286   if (!HonorNaNs)
3287     CmdArgs.push_back("-menable-no-nans");
3288 
3289   if (ApproxFunc)
3290     CmdArgs.push_back("-fapprox-func");
3291 
3292   if (MathErrno)
3293     CmdArgs.push_back("-fmath-errno");
3294 
3295  if (AssociativeMath && ReciprocalMath && !SignedZeros && ApproxFunc &&
3296      !TrappingMath)
3297     CmdArgs.push_back("-funsafe-math-optimizations");
3298 
3299   if (!SignedZeros)
3300     CmdArgs.push_back("-fno-signed-zeros");
3301 
3302   if (AssociativeMath && !SignedZeros && !TrappingMath)
3303     CmdArgs.push_back("-mreassociate");
3304 
3305   if (ReciprocalMath)
3306     CmdArgs.push_back("-freciprocal-math");
3307 
3308   if (TrappingMath) {
3309     // FP Exception Behavior is also set to strict
3310     assert(FPExceptionBehavior == "strict");
3311   }
3312 
3313   // The default is IEEE.
3314   if (DenormalFPMath != llvm::DenormalMode::getIEEE()) {
3315     llvm::SmallString<64> DenormFlag;
3316     llvm::raw_svector_ostream ArgStr(DenormFlag);
3317     ArgStr << "-fdenormal-fp-math=" << DenormalFPMath;
3318     CmdArgs.push_back(Args.MakeArgString(ArgStr.str()));
3319   }
3320 
3321   // Add f32 specific denormal mode flag if it's different.
3322   if (DenormalFP32Math != DenormalFPMath) {
3323     llvm::SmallString<64> DenormFlag;
3324     llvm::raw_svector_ostream ArgStr(DenormFlag);
3325     ArgStr << "-fdenormal-fp-math-f32=" << DenormalFP32Math;
3326     CmdArgs.push_back(Args.MakeArgString(ArgStr.str()));
3327   }
3328 
3329   if (!FPContract.empty())
3330     CmdArgs.push_back(Args.MakeArgString("-ffp-contract=" + FPContract));
3331 
3332   if (RoundingFPMath)
3333     CmdArgs.push_back(Args.MakeArgString("-frounding-math"));
3334   else
3335     CmdArgs.push_back(Args.MakeArgString("-fno-rounding-math"));
3336 
3337   if (!FPExceptionBehavior.empty())
3338     CmdArgs.push_back(Args.MakeArgString("-ffp-exception-behavior=" +
3339                       FPExceptionBehavior));
3340 
3341   if (!FPEvalMethod.empty())
3342     CmdArgs.push_back(Args.MakeArgString("-ffp-eval-method=" + FPEvalMethod));
3343 
3344   if (!Float16ExcessPrecision.empty())
3345     CmdArgs.push_back(Args.MakeArgString("-ffloat16-excess-precision=" +
3346                                          Float16ExcessPrecision));
3347   if (!BFloat16ExcessPrecision.empty())
3348     CmdArgs.push_back(Args.MakeArgString("-fbfloat16-excess-precision=" +
3349                                          BFloat16ExcessPrecision));
3350 
3351   ParseMRecip(D, Args, CmdArgs);
3352 
3353   // -ffast-math enables the __FAST_MATH__ preprocessor macro, but check for the
3354   // individual features enabled by -ffast-math instead of the option itself as
3355   // that's consistent with gcc's behaviour.
3356   if (!HonorINFs && !HonorNaNs && !MathErrno && AssociativeMath && ApproxFunc &&
3357       ReciprocalMath && !SignedZeros && !TrappingMath && !RoundingFPMath) {
3358     CmdArgs.push_back("-ffast-math");
3359     if (FPModel == "fast") {
3360       if (FPContract == "fast")
3361         // All set, do nothing.
3362         ;
3363       else if (FPContract.empty())
3364         // Enable -ffp-contract=fast
3365         CmdArgs.push_back(Args.MakeArgString("-ffp-contract=fast"));
3366       else
3367         D.Diag(clang::diag::warn_drv_overriding_option)
3368             << "-ffp-model=fast"
3369             << Args.MakeArgString("-ffp-contract=" + FPContract);
3370     }
3371   }
3372 
3373   // Handle __FINITE_MATH_ONLY__ similarly.
3374   if (!HonorINFs && !HonorNaNs)
3375     CmdArgs.push_back("-ffinite-math-only");
3376 
3377   if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ)) {
3378     CmdArgs.push_back("-mfpmath");
3379     CmdArgs.push_back(A->getValue());
3380   }
3381 
3382   // Disable a codegen optimization for floating-point casts.
3383   if (Args.hasFlag(options::OPT_fno_strict_float_cast_overflow,
3384                    options::OPT_fstrict_float_cast_overflow, false))
3385     CmdArgs.push_back("-fno-strict-float-cast-overflow");
3386 
3387   if (Range != LangOptions::ComplexRangeKind::CX_None)
3388     ComplexRangeStr = RenderComplexRangeOption(Range);
3389   if (!ComplexRangeStr.empty()) {
3390     CmdArgs.push_back(Args.MakeArgString(ComplexRangeStr));
3391     if (Args.hasArg(options::OPT_fcomplex_arithmetic_EQ))
3392       CmdArgs.push_back(Args.MakeArgString("-fcomplex-arithmetic=" +
3393                                            ComplexRangeKindToStr(Range)));
3394   }
3395   if (Args.hasArg(options::OPT_fcx_limited_range))
3396     CmdArgs.push_back("-fcx-limited-range");
3397   if (Args.hasArg(options::OPT_fcx_fortran_rules))
3398     CmdArgs.push_back("-fcx-fortran-rules");
3399   if (Args.hasArg(options::OPT_fno_cx_limited_range))
3400     CmdArgs.push_back("-fno-cx-limited-range");
3401   if (Args.hasArg(options::OPT_fno_cx_fortran_rules))
3402     CmdArgs.push_back("-fno-cx-fortran-rules");
3403 }
3404 
RenderAnalyzerOptions(const ArgList & Args,ArgStringList & CmdArgs,const llvm::Triple & Triple,const InputInfo & Input)3405 static void RenderAnalyzerOptions(const ArgList &Args, ArgStringList &CmdArgs,
3406                                   const llvm::Triple &Triple,
3407                                   const InputInfo &Input) {
3408   // Add default argument set.
3409   if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) {
3410     CmdArgs.push_back("-analyzer-checker=core");
3411     CmdArgs.push_back("-analyzer-checker=apiModeling");
3412 
3413     if (!Triple.isWindowsMSVCEnvironment()) {
3414       CmdArgs.push_back("-analyzer-checker=unix");
3415     } else {
3416       // Enable "unix" checkers that also work on Windows.
3417       CmdArgs.push_back("-analyzer-checker=unix.API");
3418       CmdArgs.push_back("-analyzer-checker=unix.Malloc");
3419       CmdArgs.push_back("-analyzer-checker=unix.MallocSizeof");
3420       CmdArgs.push_back("-analyzer-checker=unix.MismatchedDeallocator");
3421       CmdArgs.push_back("-analyzer-checker=unix.cstring.BadSizeArg");
3422       CmdArgs.push_back("-analyzer-checker=unix.cstring.NullArg");
3423     }
3424 
3425     // Disable some unix checkers for PS4/PS5.
3426     if (Triple.isPS()) {
3427       CmdArgs.push_back("-analyzer-disable-checker=unix.API");
3428       CmdArgs.push_back("-analyzer-disable-checker=unix.Vfork");
3429     }
3430 
3431     if (Triple.isOSDarwin()) {
3432       CmdArgs.push_back("-analyzer-checker=osx");
3433       CmdArgs.push_back(
3434           "-analyzer-checker=security.insecureAPI.decodeValueOfObjCType");
3435     }
3436     else if (Triple.isOSFuchsia())
3437       CmdArgs.push_back("-analyzer-checker=fuchsia");
3438 
3439     CmdArgs.push_back("-analyzer-checker=deadcode");
3440 
3441     if (types::isCXX(Input.getType()))
3442       CmdArgs.push_back("-analyzer-checker=cplusplus");
3443 
3444     if (!Triple.isPS()) {
3445       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.UncheckedReturn");
3446       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.getpw");
3447       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.gets");
3448       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mktemp");
3449       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mkstemp");
3450       CmdArgs.push_back("-analyzer-checker=security.insecureAPI.vfork");
3451     }
3452 
3453     // Default nullability checks.
3454     CmdArgs.push_back("-analyzer-checker=nullability.NullPassedToNonnull");
3455     CmdArgs.push_back("-analyzer-checker=nullability.NullReturnedFromNonnull");
3456   }
3457 
3458   // Set the output format. The default is plist, for (lame) historical reasons.
3459   CmdArgs.push_back("-analyzer-output");
3460   if (Arg *A = Args.getLastArg(options::OPT__analyzer_output))
3461     CmdArgs.push_back(A->getValue());
3462   else
3463     CmdArgs.push_back("plist");
3464 
3465   // Disable the presentation of standard compiler warnings when using
3466   // --analyze.  We only want to show static analyzer diagnostics or frontend
3467   // errors.
3468   CmdArgs.push_back("-w");
3469 
3470   // Add -Xanalyzer arguments when running as analyzer.
3471   Args.AddAllArgValues(CmdArgs, options::OPT_Xanalyzer);
3472 }
3473 
isValidSymbolName(StringRef S)3474 static bool isValidSymbolName(StringRef S) {
3475   if (S.empty())
3476     return false;
3477 
3478   if (std::isdigit(S[0]))
3479     return false;
3480 
3481   return llvm::all_of(S, [](char C) { return std::isalnum(C) || C == '_'; });
3482 }
3483 
RenderSSPOptions(const Driver & D,const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs,bool KernelOrKext)3484 static void RenderSSPOptions(const Driver &D, const ToolChain &TC,
3485                              const ArgList &Args, ArgStringList &CmdArgs,
3486                              bool KernelOrKext) {
3487   const llvm::Triple &EffectiveTriple = TC.getEffectiveTriple();
3488 
3489   // NVPTX doesn't support stack protectors; from the compiler's perspective, it
3490   // doesn't even have a stack!
3491   if (EffectiveTriple.isNVPTX())
3492     return;
3493 
3494   // -stack-protector=0 is default.
3495   LangOptions::StackProtectorMode StackProtectorLevel = LangOptions::SSPOff;
3496   LangOptions::StackProtectorMode DefaultStackProtectorLevel =
3497       TC.GetDefaultStackProtectorLevel(KernelOrKext);
3498 
3499   if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
3500                                options::OPT_fstack_protector_all,
3501                                options::OPT_fstack_protector_strong,
3502                                options::OPT_fstack_protector)) {
3503     if (A->getOption().matches(options::OPT_fstack_protector))
3504       StackProtectorLevel =
3505           std::max<>(LangOptions::SSPOn, DefaultStackProtectorLevel);
3506     else if (A->getOption().matches(options::OPT_fstack_protector_strong))
3507       StackProtectorLevel = LangOptions::SSPStrong;
3508     else if (A->getOption().matches(options::OPT_fstack_protector_all))
3509       StackProtectorLevel = LangOptions::SSPReq;
3510 
3511     if (EffectiveTriple.isBPF() && StackProtectorLevel != LangOptions::SSPOff) {
3512       D.Diag(diag::warn_drv_unsupported_option_for_target)
3513           << A->getSpelling() << EffectiveTriple.getTriple();
3514       StackProtectorLevel = DefaultStackProtectorLevel;
3515     }
3516   } else {
3517     StackProtectorLevel = DefaultStackProtectorLevel;
3518   }
3519 
3520   if (StackProtectorLevel) {
3521     CmdArgs.push_back("-stack-protector");
3522     CmdArgs.push_back(Args.MakeArgString(Twine(StackProtectorLevel)));
3523   }
3524 
3525   // --param ssp-buffer-size=
3526   for (const Arg *A : Args.filtered(options::OPT__param)) {
3527     StringRef Str(A->getValue());
3528     if (Str.starts_with("ssp-buffer-size=")) {
3529       if (StackProtectorLevel) {
3530         CmdArgs.push_back("-stack-protector-buffer-size");
3531         // FIXME: Verify the argument is a valid integer.
3532         CmdArgs.push_back(Args.MakeArgString(Str.drop_front(16)));
3533       }
3534       A->claim();
3535     }
3536   }
3537 
3538   const std::string &TripleStr = EffectiveTriple.getTriple();
3539   if (Arg *A = Args.getLastArg(options::OPT_mstack_protector_guard_EQ)) {
3540     StringRef Value = A->getValue();
3541     if (!EffectiveTriple.isX86() && !EffectiveTriple.isAArch64() &&
3542         !EffectiveTriple.isARM() && !EffectiveTriple.isThumb())
3543       D.Diag(diag::err_drv_unsupported_opt_for_target)
3544           << A->getAsString(Args) << TripleStr;
3545     if ((EffectiveTriple.isX86() || EffectiveTriple.isARM() ||
3546          EffectiveTriple.isThumb()) &&
3547         Value != "tls" && Value != "global") {
3548       D.Diag(diag::err_drv_invalid_value_with_suggestion)
3549           << A->getOption().getName() << Value << "tls global";
3550       return;
3551     }
3552     if ((EffectiveTriple.isARM() || EffectiveTriple.isThumb()) &&
3553         Value == "tls") {
3554       if (!Args.hasArg(options::OPT_mstack_protector_guard_offset_EQ)) {
3555         D.Diag(diag::err_drv_ssp_missing_offset_argument)
3556             << A->getAsString(Args);
3557         return;
3558       }
3559       // Check whether the target subarch supports the hardware TLS register
3560       if (!arm::isHardTPSupported(EffectiveTriple)) {
3561         D.Diag(diag::err_target_unsupported_tp_hard)
3562             << EffectiveTriple.getArchName();
3563         return;
3564       }
3565       // Check whether the user asked for something other than -mtp=cp15
3566       if (Arg *A = Args.getLastArg(options::OPT_mtp_mode_EQ)) {
3567         StringRef Value = A->getValue();
3568         if (Value != "cp15") {
3569           D.Diag(diag::err_drv_argument_not_allowed_with)
3570               << A->getAsString(Args) << "-mstack-protector-guard=tls";
3571           return;
3572         }
3573       }
3574       CmdArgs.push_back("-target-feature");
3575       CmdArgs.push_back("+read-tp-tpidruro");
3576     }
3577     if (EffectiveTriple.isAArch64() && Value != "sysreg" && Value != "global") {
3578       D.Diag(diag::err_drv_invalid_value_with_suggestion)
3579           << A->getOption().getName() << Value << "sysreg global";
3580       return;
3581     }
3582     A->render(Args, CmdArgs);
3583   }
3584 
3585   if (Arg *A = Args.getLastArg(options::OPT_mstack_protector_guard_offset_EQ)) {
3586     StringRef Value = A->getValue();
3587     if (!EffectiveTriple.isX86() && !EffectiveTriple.isAArch64() &&
3588         !EffectiveTriple.isARM() && !EffectiveTriple.isThumb())
3589       D.Diag(diag::err_drv_unsupported_opt_for_target)
3590           << A->getAsString(Args) << TripleStr;
3591     int Offset;
3592     if (Value.getAsInteger(10, Offset)) {
3593       D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Value;
3594       return;
3595     }
3596     if ((EffectiveTriple.isARM() || EffectiveTriple.isThumb()) &&
3597         (Offset < 0 || Offset > 0xfffff)) {
3598       D.Diag(diag::err_drv_invalid_int_value)
3599           << A->getOption().getName() << Value;
3600       return;
3601     }
3602     A->render(Args, CmdArgs);
3603   }
3604 
3605   if (Arg *A = Args.getLastArg(options::OPT_mstack_protector_guard_reg_EQ)) {
3606     StringRef Value = A->getValue();
3607     if (!EffectiveTriple.isX86() && !EffectiveTriple.isAArch64())
3608       D.Diag(diag::err_drv_unsupported_opt_for_target)
3609           << A->getAsString(Args) << TripleStr;
3610     if (EffectiveTriple.isX86() && (Value != "fs" && Value != "gs")) {
3611       D.Diag(diag::err_drv_invalid_value_with_suggestion)
3612           << A->getOption().getName() << Value << "fs gs";
3613       return;
3614     }
3615     if (EffectiveTriple.isAArch64() && Value != "sp_el0") {
3616       D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Value;
3617       return;
3618     }
3619     A->render(Args, CmdArgs);
3620   }
3621 
3622   if (Arg *A = Args.getLastArg(options::OPT_mstack_protector_guard_symbol_EQ)) {
3623     StringRef Value = A->getValue();
3624     if (!isValidSymbolName(Value)) {
3625       D.Diag(diag::err_drv_argument_only_allowed_with)
3626           << A->getOption().getName() << "legal symbol name";
3627       return;
3628     }
3629     A->render(Args, CmdArgs);
3630   }
3631 }
3632 
RenderSCPOptions(const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs)3633 static void RenderSCPOptions(const ToolChain &TC, const ArgList &Args,
3634                              ArgStringList &CmdArgs) {
3635   const llvm::Triple &EffectiveTriple = TC.getEffectiveTriple();
3636 
3637   if (!EffectiveTriple.isOSFreeBSD() && !EffectiveTriple.isOSLinux())
3638     return;
3639 
3640   if (!EffectiveTriple.isX86() && !EffectiveTriple.isSystemZ() &&
3641       !EffectiveTriple.isPPC64() && !EffectiveTriple.isAArch64())
3642     return;
3643 
3644   Args.addOptInFlag(CmdArgs, options::OPT_fstack_clash_protection,
3645                     options::OPT_fno_stack_clash_protection);
3646 }
3647 
RenderTrivialAutoVarInitOptions(const Driver & D,const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs)3648 static void RenderTrivialAutoVarInitOptions(const Driver &D,
3649                                             const ToolChain &TC,
3650                                             const ArgList &Args,
3651                                             ArgStringList &CmdArgs) {
3652   auto DefaultTrivialAutoVarInit = TC.GetDefaultTrivialAutoVarInit();
3653   StringRef TrivialAutoVarInit = "";
3654 
3655   for (const Arg *A : Args) {
3656     switch (A->getOption().getID()) {
3657     default:
3658       continue;
3659     case options::OPT_ftrivial_auto_var_init: {
3660       A->claim();
3661       StringRef Val = A->getValue();
3662       if (Val == "uninitialized" || Val == "zero" || Val == "pattern")
3663         TrivialAutoVarInit = Val;
3664       else
3665         D.Diag(diag::err_drv_unsupported_option_argument)
3666             << A->getSpelling() << Val;
3667       break;
3668     }
3669     }
3670   }
3671 
3672   if (TrivialAutoVarInit.empty())
3673     switch (DefaultTrivialAutoVarInit) {
3674     case LangOptions::TrivialAutoVarInitKind::Uninitialized:
3675       break;
3676     case LangOptions::TrivialAutoVarInitKind::Pattern:
3677       TrivialAutoVarInit = "pattern";
3678       break;
3679     case LangOptions::TrivialAutoVarInitKind::Zero:
3680       TrivialAutoVarInit = "zero";
3681       break;
3682     }
3683 
3684   if (!TrivialAutoVarInit.empty()) {
3685     CmdArgs.push_back(
3686         Args.MakeArgString("-ftrivial-auto-var-init=" + TrivialAutoVarInit));
3687   }
3688 
3689   if (Arg *A =
3690           Args.getLastArg(options::OPT_ftrivial_auto_var_init_stop_after)) {
3691     if (!Args.hasArg(options::OPT_ftrivial_auto_var_init) ||
3692         StringRef(
3693             Args.getLastArg(options::OPT_ftrivial_auto_var_init)->getValue()) ==
3694             "uninitialized")
3695       D.Diag(diag::err_drv_trivial_auto_var_init_stop_after_missing_dependency);
3696     A->claim();
3697     StringRef Val = A->getValue();
3698     if (std::stoi(Val.str()) <= 0)
3699       D.Diag(diag::err_drv_trivial_auto_var_init_stop_after_invalid_value);
3700     CmdArgs.push_back(
3701         Args.MakeArgString("-ftrivial-auto-var-init-stop-after=" + Val));
3702   }
3703 
3704   if (Arg *A = Args.getLastArg(options::OPT_ftrivial_auto_var_init_max_size)) {
3705     if (!Args.hasArg(options::OPT_ftrivial_auto_var_init) ||
3706         StringRef(
3707             Args.getLastArg(options::OPT_ftrivial_auto_var_init)->getValue()) ==
3708             "uninitialized")
3709       D.Diag(diag::err_drv_trivial_auto_var_init_max_size_missing_dependency);
3710     A->claim();
3711     StringRef Val = A->getValue();
3712     if (std::stoi(Val.str()) <= 0)
3713       D.Diag(diag::err_drv_trivial_auto_var_init_max_size_invalid_value);
3714     CmdArgs.push_back(
3715         Args.MakeArgString("-ftrivial-auto-var-init-max-size=" + Val));
3716   }
3717 }
3718 
RenderOpenCLOptions(const ArgList & Args,ArgStringList & CmdArgs,types::ID InputType)3719 static void RenderOpenCLOptions(const ArgList &Args, ArgStringList &CmdArgs,
3720                                 types::ID InputType) {
3721   // cl-denorms-are-zero is not forwarded. It is translated into a generic flag
3722   // for denormal flushing handling based on the target.
3723   const unsigned ForwardedArguments[] = {
3724       options::OPT_cl_opt_disable,
3725       options::OPT_cl_strict_aliasing,
3726       options::OPT_cl_single_precision_constant,
3727       options::OPT_cl_finite_math_only,
3728       options::OPT_cl_kernel_arg_info,
3729       options::OPT_cl_unsafe_math_optimizations,
3730       options::OPT_cl_fast_relaxed_math,
3731       options::OPT_cl_mad_enable,
3732       options::OPT_cl_no_signed_zeros,
3733       options::OPT_cl_fp32_correctly_rounded_divide_sqrt,
3734       options::OPT_cl_uniform_work_group_size
3735   };
3736 
3737   if (Arg *A = Args.getLastArg(options::OPT_cl_std_EQ)) {
3738     std::string CLStdStr = std::string("-cl-std=") + A->getValue();
3739     CmdArgs.push_back(Args.MakeArgString(CLStdStr));
3740   } else if (Arg *A = Args.getLastArg(options::OPT_cl_ext_EQ)) {
3741     std::string CLExtStr = std::string("-cl-ext=") + A->getValue();
3742     CmdArgs.push_back(Args.MakeArgString(CLExtStr));
3743   }
3744 
3745   for (const auto &Arg : ForwardedArguments)
3746     if (const auto *A = Args.getLastArg(Arg))
3747       CmdArgs.push_back(Args.MakeArgString(A->getOption().getPrefixedName()));
3748 
3749   // Only add the default headers if we are compiling OpenCL sources.
3750   if ((types::isOpenCL(InputType) ||
3751        (Args.hasArg(options::OPT_cl_std_EQ) && types::isSrcFile(InputType))) &&
3752       !Args.hasArg(options::OPT_cl_no_stdinc)) {
3753     CmdArgs.push_back("-finclude-default-header");
3754     CmdArgs.push_back("-fdeclare-opencl-builtins");
3755   }
3756 }
3757 
RenderHLSLOptions(const ArgList & Args,ArgStringList & CmdArgs,types::ID InputType)3758 static void RenderHLSLOptions(const ArgList &Args, ArgStringList &CmdArgs,
3759                               types::ID InputType) {
3760   const unsigned ForwardedArguments[] = {options::OPT_dxil_validator_version,
3761                                          options::OPT_D,
3762                                          options::OPT_I,
3763                                          options::OPT_O,
3764                                          options::OPT_emit_llvm,
3765                                          options::OPT_emit_obj,
3766                                          options::OPT_disable_llvm_passes,
3767                                          options::OPT_fnative_half_type,
3768                                          options::OPT_hlsl_entrypoint};
3769   if (!types::isHLSL(InputType))
3770     return;
3771   for (const auto &Arg : ForwardedArguments)
3772     if (const auto *A = Args.getLastArg(Arg))
3773       A->renderAsInput(Args, CmdArgs);
3774   // Add the default headers if dxc_no_stdinc is not set.
3775   if (!Args.hasArg(options::OPT_dxc_no_stdinc) &&
3776       !Args.hasArg(options::OPT_nostdinc))
3777     CmdArgs.push_back("-finclude-default-header");
3778 }
3779 
RenderOpenACCOptions(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs,types::ID InputType)3780 static void RenderOpenACCOptions(const Driver &D, const ArgList &Args,
3781                                  ArgStringList &CmdArgs, types::ID InputType) {
3782   if (!Args.hasArg(options::OPT_fopenacc))
3783     return;
3784 
3785   CmdArgs.push_back("-fopenacc");
3786 
3787   if (Arg *A = Args.getLastArg(options::OPT_openacc_macro_override)) {
3788     StringRef Value = A->getValue();
3789     int Version;
3790     if (!Value.getAsInteger(10, Version))
3791       A->renderAsInput(Args, CmdArgs);
3792     else
3793       D.Diag(diag::err_drv_clang_unsupported) << Value;
3794   }
3795 }
3796 
RenderARCMigrateToolOptions(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs)3797 static void RenderARCMigrateToolOptions(const Driver &D, const ArgList &Args,
3798                                         ArgStringList &CmdArgs) {
3799   bool ARCMTEnabled = false;
3800   if (!Args.hasArg(options::OPT_fno_objc_arc, options::OPT_fobjc_arc)) {
3801     if (const Arg *A = Args.getLastArg(options::OPT_ccc_arcmt_check,
3802                                        options::OPT_ccc_arcmt_modify,
3803                                        options::OPT_ccc_arcmt_migrate)) {
3804       ARCMTEnabled = true;
3805       switch (A->getOption().getID()) {
3806       default: llvm_unreachable("missed a case");
3807       case options::OPT_ccc_arcmt_check:
3808         CmdArgs.push_back("-arcmt-action=check");
3809         break;
3810       case options::OPT_ccc_arcmt_modify:
3811         CmdArgs.push_back("-arcmt-action=modify");
3812         break;
3813       case options::OPT_ccc_arcmt_migrate:
3814         CmdArgs.push_back("-arcmt-action=migrate");
3815         CmdArgs.push_back("-mt-migrate-directory");
3816         CmdArgs.push_back(A->getValue());
3817 
3818         Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_report_output);
3819         Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_emit_arc_errors);
3820         break;
3821       }
3822     }
3823   } else {
3824     Args.ClaimAllArgs(options::OPT_ccc_arcmt_check);
3825     Args.ClaimAllArgs(options::OPT_ccc_arcmt_modify);
3826     Args.ClaimAllArgs(options::OPT_ccc_arcmt_migrate);
3827   }
3828 
3829   if (const Arg *A = Args.getLastArg(options::OPT_ccc_objcmt_migrate)) {
3830     if (ARCMTEnabled)
3831       D.Diag(diag::err_drv_argument_not_allowed_with)
3832           << A->getAsString(Args) << "-ccc-arcmt-migrate";
3833 
3834     CmdArgs.push_back("-mt-migrate-directory");
3835     CmdArgs.push_back(A->getValue());
3836 
3837     if (!Args.hasArg(options::OPT_objcmt_migrate_literals,
3838                      options::OPT_objcmt_migrate_subscripting,
3839                      options::OPT_objcmt_migrate_property)) {
3840       // None specified, means enable them all.
3841       CmdArgs.push_back("-objcmt-migrate-literals");
3842       CmdArgs.push_back("-objcmt-migrate-subscripting");
3843       CmdArgs.push_back("-objcmt-migrate-property");
3844     } else {
3845       Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
3846       Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
3847       Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
3848     }
3849   } else {
3850     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
3851     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
3852     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
3853     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_all);
3854     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readonly_property);
3855     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readwrite_property);
3856     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property_dot_syntax);
3857     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_annotation);
3858     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_instancetype);
3859     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_nsmacros);
3860     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_protocol_conformance);
3861     Args.AddLastArg(CmdArgs, options::OPT_objcmt_atomic_property);
3862     Args.AddLastArg(CmdArgs, options::OPT_objcmt_returns_innerpointer_property);
3863     Args.AddLastArg(CmdArgs, options::OPT_objcmt_ns_nonatomic_iosonly);
3864     Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_designated_init);
3865     Args.AddLastArg(CmdArgs, options::OPT_objcmt_allowlist_dir_path);
3866   }
3867 }
3868 
RenderBuiltinOptions(const ToolChain & TC,const llvm::Triple & T,const ArgList & Args,ArgStringList & CmdArgs)3869 static void RenderBuiltinOptions(const ToolChain &TC, const llvm::Triple &T,
3870                                  const ArgList &Args, ArgStringList &CmdArgs) {
3871   // -fbuiltin is default unless -mkernel is used.
3872   bool UseBuiltins =
3873       Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin,
3874                    !Args.hasArg(options::OPT_mkernel));
3875   if (!UseBuiltins)
3876     CmdArgs.push_back("-fno-builtin");
3877 
3878   // -ffreestanding implies -fno-builtin.
3879   if (Args.hasArg(options::OPT_ffreestanding))
3880     UseBuiltins = false;
3881 
3882   // Process the -fno-builtin-* options.
3883   for (const Arg *A : Args.filtered(options::OPT_fno_builtin_)) {
3884     A->claim();
3885 
3886     // If -fno-builtin is specified, then there's no need to pass the option to
3887     // the frontend.
3888     if (UseBuiltins)
3889       A->render(Args, CmdArgs);
3890   }
3891 
3892   // le32-specific flags:
3893   //  -fno-math-builtin: clang should not convert math builtins to intrinsics
3894   //                     by default.
3895   if (TC.getArch() == llvm::Triple::le32)
3896     CmdArgs.push_back("-fno-math-builtin");
3897 }
3898 
getDefaultModuleCachePath(SmallVectorImpl<char> & Result)3899 bool Driver::getDefaultModuleCachePath(SmallVectorImpl<char> &Result) {
3900   if (const char *Str = std::getenv("CLANG_MODULE_CACHE_PATH")) {
3901     Twine Path{Str};
3902     Path.toVector(Result);
3903     return Path.getSingleStringRef() != "";
3904   }
3905   if (llvm::sys::path::cache_directory(Result)) {
3906     llvm::sys::path::append(Result, "clang");
3907     llvm::sys::path::append(Result, "ModuleCache");
3908     return true;
3909   }
3910   return false;
3911 }
3912 
3913 llvm::SmallString<256>
getCXX20NamedModuleOutputPath(const ArgList & Args,const char * BaseInput)3914 clang::driver::tools::getCXX20NamedModuleOutputPath(const ArgList &Args,
3915                                                     const char *BaseInput) {
3916   if (Arg *ModuleOutputEQ = Args.getLastArg(options::OPT_fmodule_output_EQ))
3917     return StringRef(ModuleOutputEQ->getValue());
3918 
3919   SmallString<256> OutputPath;
3920   if (Arg *FinalOutput = Args.getLastArg(options::OPT_o);
3921       FinalOutput && Args.hasArg(options::OPT_c))
3922     OutputPath = FinalOutput->getValue();
3923   else
3924     OutputPath = BaseInput;
3925 
3926   const char *Extension = types::getTypeTempSuffix(types::TY_ModuleFile);
3927   llvm::sys::path::replace_extension(OutputPath, Extension);
3928   return OutputPath;
3929 }
3930 
RenderModulesOptions(Compilation & C,const Driver & D,const ArgList & Args,const InputInfo & Input,const InputInfo & Output,bool HaveStd20,ArgStringList & CmdArgs)3931 static bool RenderModulesOptions(Compilation &C, const Driver &D,
3932                                  const ArgList &Args, const InputInfo &Input,
3933                                  const InputInfo &Output, bool HaveStd20,
3934                                  ArgStringList &CmdArgs) {
3935   bool IsCXX = types::isCXX(Input.getType());
3936   bool HaveStdCXXModules = IsCXX && HaveStd20;
3937   bool HaveModules = HaveStdCXXModules;
3938 
3939   // -fmodules enables the use of precompiled modules (off by default).
3940   // Users can pass -fno-cxx-modules to turn off modules support for
3941   // C++/Objective-C++ programs.
3942   bool HaveClangModules = false;
3943   if (Args.hasFlag(options::OPT_fmodules, options::OPT_fno_modules, false)) {
3944     bool AllowedInCXX = Args.hasFlag(options::OPT_fcxx_modules,
3945                                      options::OPT_fno_cxx_modules, true);
3946     if (AllowedInCXX || !IsCXX) {
3947       CmdArgs.push_back("-fmodules");
3948       HaveClangModules = true;
3949     }
3950   }
3951 
3952   HaveModules |= HaveClangModules;
3953 
3954   // -fmodule-maps enables implicit reading of module map files. By default,
3955   // this is enabled if we are using Clang's flavor of precompiled modules.
3956   if (Args.hasFlag(options::OPT_fimplicit_module_maps,
3957                    options::OPT_fno_implicit_module_maps, HaveClangModules))
3958     CmdArgs.push_back("-fimplicit-module-maps");
3959 
3960   // -fmodules-decluse checks that modules used are declared so (off by default)
3961   Args.addOptInFlag(CmdArgs, options::OPT_fmodules_decluse,
3962                     options::OPT_fno_modules_decluse);
3963 
3964   // -fmodules-strict-decluse is like -fmodule-decluse, but also checks that
3965   // all #included headers are part of modules.
3966   if (Args.hasFlag(options::OPT_fmodules_strict_decluse,
3967                    options::OPT_fno_modules_strict_decluse, false))
3968     CmdArgs.push_back("-fmodules-strict-decluse");
3969 
3970   // -fno-implicit-modules turns off implicitly compiling modules on demand.
3971   bool ImplicitModules = false;
3972   if (!Args.hasFlag(options::OPT_fimplicit_modules,
3973                     options::OPT_fno_implicit_modules, HaveClangModules)) {
3974     if (HaveModules)
3975       CmdArgs.push_back("-fno-implicit-modules");
3976   } else if (HaveModules) {
3977     ImplicitModules = true;
3978     // -fmodule-cache-path specifies where our implicitly-built module files
3979     // should be written.
3980     SmallString<128> Path;
3981     if (Arg *A = Args.getLastArg(options::OPT_fmodules_cache_path))
3982       Path = A->getValue();
3983 
3984     bool HasPath = true;
3985     if (C.isForDiagnostics()) {
3986       // When generating crash reports, we want to emit the modules along with
3987       // the reproduction sources, so we ignore any provided module path.
3988       Path = Output.getFilename();
3989       llvm::sys::path::replace_extension(Path, ".cache");
3990       llvm::sys::path::append(Path, "modules");
3991     } else if (Path.empty()) {
3992       // No module path was provided: use the default.
3993       HasPath = Driver::getDefaultModuleCachePath(Path);
3994     }
3995 
3996     // `HasPath` will only be false if getDefaultModuleCachePath() fails.
3997     // That being said, that failure is unlikely and not caching is harmless.
3998     if (HasPath) {
3999       const char Arg[] = "-fmodules-cache-path=";
4000       Path.insert(Path.begin(), Arg, Arg + strlen(Arg));
4001       CmdArgs.push_back(Args.MakeArgString(Path));
4002     }
4003   }
4004 
4005   if (HaveModules) {
4006     if (Args.hasFlag(options::OPT_fprebuilt_implicit_modules,
4007                      options::OPT_fno_prebuilt_implicit_modules, false))
4008       CmdArgs.push_back("-fprebuilt-implicit-modules");
4009     if (Args.hasFlag(options::OPT_fmodules_validate_input_files_content,
4010                      options::OPT_fno_modules_validate_input_files_content,
4011                      false))
4012       CmdArgs.push_back("-fvalidate-ast-input-files-content");
4013   }
4014 
4015   // -fmodule-name specifies the module that is currently being built (or
4016   // used for header checking by -fmodule-maps).
4017   Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ);
4018 
4019   // -fmodule-map-file can be used to specify files containing module
4020   // definitions.
4021   Args.AddAllArgs(CmdArgs, options::OPT_fmodule_map_file);
4022 
4023   // -fbuiltin-module-map can be used to load the clang
4024   // builtin headers modulemap file.
4025   if (Args.hasArg(options::OPT_fbuiltin_module_map)) {
4026     SmallString<128> BuiltinModuleMap(D.ResourceDir);
4027     llvm::sys::path::append(BuiltinModuleMap, "include");
4028     llvm::sys::path::append(BuiltinModuleMap, "module.modulemap");
4029     if (llvm::sys::fs::exists(BuiltinModuleMap))
4030       CmdArgs.push_back(
4031           Args.MakeArgString("-fmodule-map-file=" + BuiltinModuleMap));
4032   }
4033 
4034   // The -fmodule-file=<name>=<file> form specifies the mapping of module
4035   // names to precompiled module files (the module is loaded only if used).
4036   // The -fmodule-file=<file> form can be used to unconditionally load
4037   // precompiled module files (whether used or not).
4038   if (HaveModules || Input.getType() == clang::driver::types::TY_ModuleFile) {
4039     Args.AddAllArgs(CmdArgs, options::OPT_fmodule_file);
4040 
4041     // -fprebuilt-module-path specifies where to load the prebuilt module files.
4042     for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path)) {
4043       CmdArgs.push_back(Args.MakeArgString(
4044           std::string("-fprebuilt-module-path=") + A->getValue()));
4045       A->claim();
4046     }
4047   } else
4048     Args.ClaimAllArgs(options::OPT_fmodule_file);
4049 
4050   // When building modules and generating crashdumps, we need to dump a module
4051   // dependency VFS alongside the output.
4052   if (HaveClangModules && C.isForDiagnostics()) {
4053     SmallString<128> VFSDir(Output.getFilename());
4054     llvm::sys::path::replace_extension(VFSDir, ".cache");
4055     // Add the cache directory as a temp so the crash diagnostics pick it up.
4056     C.addTempFile(Args.MakeArgString(VFSDir));
4057 
4058     llvm::sys::path::append(VFSDir, "vfs");
4059     CmdArgs.push_back("-module-dependency-dir");
4060     CmdArgs.push_back(Args.MakeArgString(VFSDir));
4061   }
4062 
4063   if (HaveClangModules)
4064     Args.AddLastArg(CmdArgs, options::OPT_fmodules_user_build_path);
4065 
4066   // Pass through all -fmodules-ignore-macro arguments.
4067   Args.AddAllArgs(CmdArgs, options::OPT_fmodules_ignore_macro);
4068   Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_interval);
4069   Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_after);
4070 
4071   if (HaveClangModules) {
4072     Args.AddLastArg(CmdArgs, options::OPT_fbuild_session_timestamp);
4073 
4074     if (Arg *A = Args.getLastArg(options::OPT_fbuild_session_file)) {
4075       if (Args.hasArg(options::OPT_fbuild_session_timestamp))
4076         D.Diag(diag::err_drv_argument_not_allowed_with)
4077             << A->getAsString(Args) << "-fbuild-session-timestamp";
4078 
4079       llvm::sys::fs::file_status Status;
4080       if (llvm::sys::fs::status(A->getValue(), Status))
4081         D.Diag(diag::err_drv_no_such_file) << A->getValue();
4082       CmdArgs.push_back(Args.MakeArgString(
4083           "-fbuild-session-timestamp=" +
4084           Twine((uint64_t)std::chrono::duration_cast<std::chrono::seconds>(
4085                     Status.getLastModificationTime().time_since_epoch())
4086                     .count())));
4087     }
4088 
4089     if (Args.getLastArg(
4090             options::OPT_fmodules_validate_once_per_build_session)) {
4091       if (!Args.getLastArg(options::OPT_fbuild_session_timestamp,
4092                            options::OPT_fbuild_session_file))
4093         D.Diag(diag::err_drv_modules_validate_once_requires_timestamp);
4094 
4095       Args.AddLastArg(CmdArgs,
4096                       options::OPT_fmodules_validate_once_per_build_session);
4097     }
4098 
4099     if (Args.hasFlag(options::OPT_fmodules_validate_system_headers,
4100                      options::OPT_fno_modules_validate_system_headers,
4101                      ImplicitModules))
4102       CmdArgs.push_back("-fmodules-validate-system-headers");
4103 
4104     Args.AddLastArg(CmdArgs,
4105                     options::OPT_fmodules_disable_diagnostic_validation);
4106   } else {
4107     Args.ClaimAllArgs(options::OPT_fbuild_session_timestamp);
4108     Args.ClaimAllArgs(options::OPT_fbuild_session_file);
4109     Args.ClaimAllArgs(options::OPT_fmodules_validate_once_per_build_session);
4110     Args.ClaimAllArgs(options::OPT_fmodules_validate_system_headers);
4111     Args.ClaimAllArgs(options::OPT_fno_modules_validate_system_headers);
4112     Args.ClaimAllArgs(options::OPT_fmodules_disable_diagnostic_validation);
4113   }
4114 
4115   // FIXME: We provisionally don't check ODR violations for decls in the global
4116   // module fragment.
4117   CmdArgs.push_back("-fskip-odr-check-in-gmf");
4118 
4119   if (Args.hasArg(options::OPT_modules_reduced_bmi) &&
4120       (Input.getType() == driver::types::TY_CXXModule ||
4121        Input.getType() == driver::types::TY_PP_CXXModule)) {
4122     CmdArgs.push_back("-fexperimental-modules-reduced-bmi");
4123 
4124     if (Args.hasArg(options::OPT_fmodule_output_EQ))
4125       Args.AddLastArg(CmdArgs, options::OPT_fmodule_output_EQ);
4126     else
4127       CmdArgs.push_back(Args.MakeArgString(
4128           "-fmodule-output=" +
4129           getCXX20NamedModuleOutputPath(Args, Input.getBaseInput())));
4130   }
4131 
4132   // Noop if we see '-fexperimental-modules-reduced-bmi' with other translation
4133   // units than module units. This is more user friendly to allow end uers to
4134   // enable this feature without asking for help from build systems.
4135   Args.ClaimAllArgs(options::OPT_modules_reduced_bmi);
4136 
4137   // We need to include the case the input file is a module file here.
4138   // Since the default compilation model for C++ module interface unit will
4139   // create temporary module file and compile the temporary module file
4140   // to get the object file. Then the `-fmodule-output` flag will be
4141   // brought to the second compilation process. So we have to claim it for
4142   // the case too.
4143   if (Input.getType() == driver::types::TY_CXXModule ||
4144       Input.getType() == driver::types::TY_PP_CXXModule ||
4145       Input.getType() == driver::types::TY_ModuleFile) {
4146     Args.ClaimAllArgs(options::OPT_fmodule_output);
4147     Args.ClaimAllArgs(options::OPT_fmodule_output_EQ);
4148   }
4149 
4150   return HaveModules;
4151 }
4152 
RenderCharacterOptions(const ArgList & Args,const llvm::Triple & T,ArgStringList & CmdArgs)4153 static void RenderCharacterOptions(const ArgList &Args, const llvm::Triple &T,
4154                                    ArgStringList &CmdArgs) {
4155   // -fsigned-char is default.
4156   if (const Arg *A = Args.getLastArg(options::OPT_fsigned_char,
4157                                      options::OPT_fno_signed_char,
4158                                      options::OPT_funsigned_char,
4159                                      options::OPT_fno_unsigned_char)) {
4160     if (A->getOption().matches(options::OPT_funsigned_char) ||
4161         A->getOption().matches(options::OPT_fno_signed_char)) {
4162       CmdArgs.push_back("-fno-signed-char");
4163     }
4164   } else if (!isSignedCharDefault(T)) {
4165     CmdArgs.push_back("-fno-signed-char");
4166   }
4167 
4168   // The default depends on the language standard.
4169   Args.AddLastArg(CmdArgs, options::OPT_fchar8__t, options::OPT_fno_char8__t);
4170 
4171   if (const Arg *A = Args.getLastArg(options::OPT_fshort_wchar,
4172                                      options::OPT_fno_short_wchar)) {
4173     if (A->getOption().matches(options::OPT_fshort_wchar)) {
4174       CmdArgs.push_back("-fwchar-type=short");
4175       CmdArgs.push_back("-fno-signed-wchar");
4176     } else {
4177       bool IsARM = T.isARM() || T.isThumb() || T.isAArch64();
4178       CmdArgs.push_back("-fwchar-type=int");
4179       if (T.isOSzOS() ||
4180           (IsARM && !(T.isOSWindows() || T.isOSNetBSD() || T.isOSOpenBSD())))
4181         CmdArgs.push_back("-fno-signed-wchar");
4182       else
4183         CmdArgs.push_back("-fsigned-wchar");
4184     }
4185   } else if (T.isOSzOS())
4186     CmdArgs.push_back("-fno-signed-wchar");
4187 }
4188 
RenderObjCOptions(const ToolChain & TC,const Driver & D,const llvm::Triple & T,const ArgList & Args,ObjCRuntime & Runtime,bool InferCovariantReturns,const InputInfo & Input,ArgStringList & CmdArgs)4189 static void RenderObjCOptions(const ToolChain &TC, const Driver &D,
4190                               const llvm::Triple &T, const ArgList &Args,
4191                               ObjCRuntime &Runtime, bool InferCovariantReturns,
4192                               const InputInfo &Input, ArgStringList &CmdArgs) {
4193   const llvm::Triple::ArchType Arch = TC.getArch();
4194 
4195   // -fobjc-dispatch-method is only relevant with the nonfragile-abi, and legacy
4196   // is the default. Except for deployment target of 10.5, next runtime is
4197   // always legacy dispatch and -fno-objc-legacy-dispatch gets ignored silently.
4198   if (Runtime.isNonFragile()) {
4199     if (!Args.hasFlag(options::OPT_fobjc_legacy_dispatch,
4200                       options::OPT_fno_objc_legacy_dispatch,
4201                       Runtime.isLegacyDispatchDefaultForArch(Arch))) {
4202       if (TC.UseObjCMixedDispatch())
4203         CmdArgs.push_back("-fobjc-dispatch-method=mixed");
4204       else
4205         CmdArgs.push_back("-fobjc-dispatch-method=non-legacy");
4206     }
4207   }
4208 
4209   // When ObjectiveC legacy runtime is in effect on MacOSX, turn on the option
4210   // to do Array/Dictionary subscripting by default.
4211   if (Arch == llvm::Triple::x86 && T.isMacOSX() &&
4212       Runtime.getKind() == ObjCRuntime::FragileMacOSX && Runtime.isNeXTFamily())
4213     CmdArgs.push_back("-fobjc-subscripting-legacy-runtime");
4214 
4215   // Allow -fno-objc-arr to trump -fobjc-arr/-fobjc-arc.
4216   // NOTE: This logic is duplicated in ToolChains.cpp.
4217   if (isObjCAutoRefCount(Args)) {
4218     TC.CheckObjCARC();
4219 
4220     CmdArgs.push_back("-fobjc-arc");
4221 
4222     // FIXME: It seems like this entire block, and several around it should be
4223     // wrapped in isObjC, but for now we just use it here as this is where it
4224     // was being used previously.
4225     if (types::isCXX(Input.getType()) && types::isObjC(Input.getType())) {
4226       if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx)
4227         CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
4228       else
4229         CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
4230     }
4231 
4232     // Allow the user to enable full exceptions code emission.
4233     // We default off for Objective-C, on for Objective-C++.
4234     if (Args.hasFlag(options::OPT_fobjc_arc_exceptions,
4235                      options::OPT_fno_objc_arc_exceptions,
4236                      /*Default=*/types::isCXX(Input.getType())))
4237       CmdArgs.push_back("-fobjc-arc-exceptions");
4238   }
4239 
4240   // Silence warning for full exception code emission options when explicitly
4241   // set to use no ARC.
4242   if (Args.hasArg(options::OPT_fno_objc_arc)) {
4243     Args.ClaimAllArgs(options::OPT_fobjc_arc_exceptions);
4244     Args.ClaimAllArgs(options::OPT_fno_objc_arc_exceptions);
4245   }
4246 
4247   // Allow the user to control whether messages can be converted to runtime
4248   // functions.
4249   if (types::isObjC(Input.getType())) {
4250     auto *Arg = Args.getLastArg(
4251         options::OPT_fobjc_convert_messages_to_runtime_calls,
4252         options::OPT_fno_objc_convert_messages_to_runtime_calls);
4253     if (Arg &&
4254         Arg->getOption().matches(
4255             options::OPT_fno_objc_convert_messages_to_runtime_calls))
4256       CmdArgs.push_back("-fno-objc-convert-messages-to-runtime-calls");
4257   }
4258 
4259   // -fobjc-infer-related-result-type is the default, except in the Objective-C
4260   // rewriter.
4261   if (InferCovariantReturns)
4262     CmdArgs.push_back("-fno-objc-infer-related-result-type");
4263 
4264   // Pass down -fobjc-weak or -fno-objc-weak if present.
4265   if (types::isObjC(Input.getType())) {
4266     auto WeakArg =
4267         Args.getLastArg(options::OPT_fobjc_weak, options::OPT_fno_objc_weak);
4268     if (!WeakArg) {
4269       // nothing to do
4270     } else if (!Runtime.allowsWeak()) {
4271       if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
4272         D.Diag(diag::err_objc_weak_unsupported);
4273     } else {
4274       WeakArg->render(Args, CmdArgs);
4275     }
4276   }
4277 
4278   if (Args.hasArg(options::OPT_fobjc_disable_direct_methods_for_testing))
4279     CmdArgs.push_back("-fobjc-disable-direct-methods-for-testing");
4280 }
4281 
RenderDiagnosticsOptions(const Driver & D,const ArgList & Args,ArgStringList & CmdArgs)4282 static void RenderDiagnosticsOptions(const Driver &D, const ArgList &Args,
4283                                      ArgStringList &CmdArgs) {
4284   bool CaretDefault = true;
4285   bool ColumnDefault = true;
4286 
4287   if (const Arg *A = Args.getLastArg(options::OPT__SLASH_diagnostics_classic,
4288                                      options::OPT__SLASH_diagnostics_column,
4289                                      options::OPT__SLASH_diagnostics_caret)) {
4290     switch (A->getOption().getID()) {
4291     case options::OPT__SLASH_diagnostics_caret:
4292       CaretDefault = true;
4293       ColumnDefault = true;
4294       break;
4295     case options::OPT__SLASH_diagnostics_column:
4296       CaretDefault = false;
4297       ColumnDefault = true;
4298       break;
4299     case options::OPT__SLASH_diagnostics_classic:
4300       CaretDefault = false;
4301       ColumnDefault = false;
4302       break;
4303     }
4304   }
4305 
4306   // -fcaret-diagnostics is default.
4307   if (!Args.hasFlag(options::OPT_fcaret_diagnostics,
4308                     options::OPT_fno_caret_diagnostics, CaretDefault))
4309     CmdArgs.push_back("-fno-caret-diagnostics");
4310 
4311   Args.addOptOutFlag(CmdArgs, options::OPT_fdiagnostics_fixit_info,
4312                      options::OPT_fno_diagnostics_fixit_info);
4313   Args.addOptOutFlag(CmdArgs, options::OPT_fdiagnostics_show_option,
4314                      options::OPT_fno_diagnostics_show_option);
4315 
4316   if (const Arg *A =
4317           Args.getLastArg(options::OPT_fdiagnostics_show_category_EQ)) {
4318     CmdArgs.push_back("-fdiagnostics-show-category");
4319     CmdArgs.push_back(A->getValue());
4320   }
4321 
4322   Args.addOptInFlag(CmdArgs, options::OPT_fdiagnostics_show_hotness,
4323                     options::OPT_fno_diagnostics_show_hotness);
4324 
4325   if (const Arg *A =
4326           Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
4327     std::string Opt =
4328         std::string("-fdiagnostics-hotness-threshold=") + A->getValue();
4329     CmdArgs.push_back(Args.MakeArgString(Opt));
4330   }
4331 
4332   if (const Arg *A =
4333           Args.getLastArg(options::OPT_fdiagnostics_misexpect_tolerance_EQ)) {
4334     std::string Opt =
4335         std::string("-fdiagnostics-misexpect-tolerance=") + A->getValue();
4336     CmdArgs.push_back(Args.MakeArgString(Opt));
4337   }
4338 
4339   if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) {
4340     CmdArgs.push_back("-fdiagnostics-format");
4341     CmdArgs.push_back(A->getValue());
4342     if (StringRef(A->getValue()) == "sarif" ||
4343         StringRef(A->getValue()) == "SARIF")
4344       D.Diag(diag::warn_drv_sarif_format_unstable);
4345   }
4346 
4347   if (const Arg *A = Args.getLastArg(
4348           options::OPT_fdiagnostics_show_note_include_stack,
4349           options::OPT_fno_diagnostics_show_note_include_stack)) {
4350     const Option &O = A->getOption();
4351     if (O.matches(options::OPT_fdiagnostics_show_note_include_stack))
4352       CmdArgs.push_back("-fdiagnostics-show-note-include-stack");
4353     else
4354       CmdArgs.push_back("-fno-diagnostics-show-note-include-stack");
4355   }
4356 
4357   // Color diagnostics are parsed by the driver directly from argv and later
4358   // re-parsed to construct this job; claim any possible color diagnostic here
4359   // to avoid warn_drv_unused_argument and diagnose bad
4360   // OPT_fdiagnostics_color_EQ values.
4361   Args.getLastArg(options::OPT_fcolor_diagnostics,
4362                   options::OPT_fno_color_diagnostics);
4363   if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_color_EQ)) {
4364     StringRef Value(A->getValue());
4365     if (Value != "always" && Value != "never" && Value != "auto")
4366       D.Diag(diag::err_drv_invalid_argument_to_option)
4367           << Value << A->getOption().getName();
4368   }
4369 
4370   if (D.getDiags().getDiagnosticOptions().ShowColors)
4371     CmdArgs.push_back("-fcolor-diagnostics");
4372 
4373   if (Args.hasArg(options::OPT_fansi_escape_codes))
4374     CmdArgs.push_back("-fansi-escape-codes");
4375 
4376   Args.addOptOutFlag(CmdArgs, options::OPT_fshow_source_location,
4377                      options::OPT_fno_show_source_location);
4378 
4379   Args.addOptOutFlag(CmdArgs, options::OPT_fdiagnostics_show_line_numbers,
4380                      options::OPT_fno_diagnostics_show_line_numbers);
4381 
4382   if (Args.hasArg(options::OPT_fdiagnostics_absolute_paths))
4383     CmdArgs.push_back("-fdiagnostics-absolute-paths");
4384 
4385   if (!Args.hasFlag(options::OPT_fshow_column, options::OPT_fno_show_column,
4386                     ColumnDefault))
4387     CmdArgs.push_back("-fno-show-column");
4388 
4389   Args.addOptOutFlag(CmdArgs, options::OPT_fspell_checking,
4390                      options::OPT_fno_spell_checking);
4391 }
4392 
getDebugFissionKind(const Driver & D,const ArgList & Args,Arg * & Arg)4393 DwarfFissionKind tools::getDebugFissionKind(const Driver &D,
4394                                             const ArgList &Args, Arg *&Arg) {
4395   Arg = Args.getLastArg(options::OPT_gsplit_dwarf, options::OPT_gsplit_dwarf_EQ,
4396                         options::OPT_gno_split_dwarf);
4397   if (!Arg || Arg->getOption().matches(options::OPT_gno_split_dwarf))
4398     return DwarfFissionKind::None;
4399 
4400   if (Arg->getOption().matches(options::OPT_gsplit_dwarf))
4401     return DwarfFissionKind::Split;
4402 
4403   StringRef Value = Arg->getValue();
4404   if (Value == "split")
4405     return DwarfFissionKind::Split;
4406   if (Value == "single")
4407     return DwarfFissionKind::Single;
4408 
4409   D.Diag(diag::err_drv_unsupported_option_argument)
4410       << Arg->getSpelling() << Arg->getValue();
4411   return DwarfFissionKind::None;
4412 }
4413 
renderDwarfFormat(const Driver & D,const llvm::Triple & T,const ArgList & Args,ArgStringList & CmdArgs,unsigned DwarfVersion)4414 static void renderDwarfFormat(const Driver &D, const llvm::Triple &T,
4415                               const ArgList &Args, ArgStringList &CmdArgs,
4416                               unsigned DwarfVersion) {
4417   auto *DwarfFormatArg =
4418       Args.getLastArg(options::OPT_gdwarf64, options::OPT_gdwarf32);
4419   if (!DwarfFormatArg)
4420     return;
4421 
4422   if (DwarfFormatArg->getOption().matches(options::OPT_gdwarf64)) {
4423     if (DwarfVersion < 3)
4424       D.Diag(diag::err_drv_argument_only_allowed_with)
4425           << DwarfFormatArg->getAsString(Args) << "DWARFv3 or greater";
4426     else if (!T.isArch64Bit())
4427       D.Diag(diag::err_drv_argument_only_allowed_with)
4428           << DwarfFormatArg->getAsString(Args) << "64 bit architecture";
4429     else if (!T.isOSBinFormatELF())
4430       D.Diag(diag::err_drv_argument_only_allowed_with)
4431           << DwarfFormatArg->getAsString(Args) << "ELF platforms";
4432   }
4433 
4434   DwarfFormatArg->render(Args, CmdArgs);
4435 }
4436 
4437 static void
renderDebugOptions(const ToolChain & TC,const Driver & D,const llvm::Triple & T,const ArgList & Args,bool IRInput,ArgStringList & CmdArgs,const InputInfo & Output,llvm::codegenoptions::DebugInfoKind & DebugInfoKind,DwarfFissionKind & DwarfFission)4438 renderDebugOptions(const ToolChain &TC, const Driver &D, const llvm::Triple &T,
4439                    const ArgList &Args, bool IRInput, ArgStringList &CmdArgs,
4440                    const InputInfo &Output,
4441                    llvm::codegenoptions::DebugInfoKind &DebugInfoKind,
4442                    DwarfFissionKind &DwarfFission) {
4443   if (Args.hasFlag(options::OPT_fdebug_info_for_profiling,
4444                    options::OPT_fno_debug_info_for_profiling, false) &&
4445       checkDebugInfoOption(
4446           Args.getLastArg(options::OPT_fdebug_info_for_profiling), Args, D, TC))
4447     CmdArgs.push_back("-fdebug-info-for-profiling");
4448 
4449   // The 'g' groups options involve a somewhat intricate sequence of decisions
4450   // about what to pass from the driver to the frontend, but by the time they
4451   // reach cc1 they've been factored into three well-defined orthogonal choices:
4452   //  * what level of debug info to generate
4453   //  * what dwarf version to write
4454   //  * what debugger tuning to use
4455   // This avoids having to monkey around further in cc1 other than to disable
4456   // codeview if not running in a Windows environment. Perhaps even that
4457   // decision should be made in the driver as well though.
4458   llvm::DebuggerKind DebuggerTuning = TC.getDefaultDebuggerTuning();
4459 
4460   bool SplitDWARFInlining =
4461       Args.hasFlag(options::OPT_fsplit_dwarf_inlining,
4462                    options::OPT_fno_split_dwarf_inlining, false);
4463 
4464   // Normally -gsplit-dwarf is only useful with -gN. For IR input, Clang does
4465   // object file generation and no IR generation, -gN should not be needed. So
4466   // allow -gsplit-dwarf with either -gN or IR input.
4467   if (IRInput || Args.hasArg(options::OPT_g_Group)) {
4468     Arg *SplitDWARFArg;
4469     DwarfFission = getDebugFissionKind(D, Args, SplitDWARFArg);
4470     if (DwarfFission != DwarfFissionKind::None &&
4471         !checkDebugInfoOption(SplitDWARFArg, Args, D, TC)) {
4472       DwarfFission = DwarfFissionKind::None;
4473       SplitDWARFInlining = false;
4474     }
4475   }
4476   if (const Arg *A = Args.getLastArg(options::OPT_g_Group)) {
4477     DebugInfoKind = llvm::codegenoptions::DebugInfoConstructor;
4478 
4479     // If the last option explicitly specified a debug-info level, use it.
4480     if (checkDebugInfoOption(A, Args, D, TC) &&
4481         A->getOption().matches(options::OPT_gN_Group)) {
4482       DebugInfoKind = debugLevelToInfoKind(*A);
4483       // For -g0 or -gline-tables-only, drop -gsplit-dwarf. This gets a bit more
4484       // complicated if you've disabled inline info in the skeleton CUs
4485       // (SplitDWARFInlining) - then there's value in composing split-dwarf and
4486       // line-tables-only, so let those compose naturally in that case.
4487       if (DebugInfoKind == llvm::codegenoptions::NoDebugInfo ||
4488           DebugInfoKind == llvm::codegenoptions::DebugDirectivesOnly ||
4489           (DebugInfoKind == llvm::codegenoptions::DebugLineTablesOnly &&
4490            SplitDWARFInlining))
4491         DwarfFission = DwarfFissionKind::None;
4492     }
4493   }
4494 
4495   // If a debugger tuning argument appeared, remember it.
4496   bool HasDebuggerTuning = false;
4497   if (const Arg *A =
4498           Args.getLastArg(options::OPT_gTune_Group, options::OPT_ggdbN_Group)) {
4499     HasDebuggerTuning = true;
4500     if (checkDebugInfoOption(A, Args, D, TC)) {
4501       if (A->getOption().matches(options::OPT_glldb))
4502         DebuggerTuning = llvm::DebuggerKind::LLDB;
4503       else if (A->getOption().matches(options::OPT_gsce))
4504         DebuggerTuning = llvm::DebuggerKind::SCE;
4505       else if (A->getOption().matches(options::OPT_gdbx))
4506         DebuggerTuning = llvm::DebuggerKind::DBX;
4507       else
4508         DebuggerTuning = llvm::DebuggerKind::GDB;
4509     }
4510   }
4511 
4512   // If a -gdwarf argument appeared, remember it.
4513   bool EmitDwarf = false;
4514   if (const Arg *A = getDwarfNArg(Args))
4515     EmitDwarf = checkDebugInfoOption(A, Args, D, TC);
4516 
4517   bool EmitCodeView = false;
4518   if (const Arg *A = Args.getLastArg(options::OPT_gcodeview))
4519     EmitCodeView = checkDebugInfoOption(A, Args, D, TC);
4520 
4521   // If the user asked for debug info but did not explicitly specify -gcodeview
4522   // or -gdwarf, ask the toolchain for the default format.
4523   if (!EmitCodeView && !EmitDwarf &&
4524       DebugInfoKind != llvm::codegenoptions::NoDebugInfo) {
4525     switch (TC.getDefaultDebugFormat()) {
4526     case llvm::codegenoptions::DIF_CodeView:
4527       EmitCodeView = true;
4528       break;
4529     case llvm::codegenoptions::DIF_DWARF:
4530       EmitDwarf = true;
4531       break;
4532     }
4533   }
4534 
4535   unsigned RequestedDWARFVersion = 0; // DWARF version requested by the user
4536   unsigned EffectiveDWARFVersion = 0; // DWARF version TC can generate. It may
4537                                       // be lower than what the user wanted.
4538   if (EmitDwarf) {
4539     RequestedDWARFVersion = getDwarfVersion(TC, Args);
4540     // Clamp effective DWARF version to the max supported by the toolchain.
4541     EffectiveDWARFVersion =
4542         std::min(RequestedDWARFVersion, TC.getMaxDwarfVersion());
4543   } else {
4544     Args.ClaimAllArgs(options::OPT_fdebug_default_version);
4545   }
4546 
4547   // -gline-directives-only supported only for the DWARF debug info.
4548   if (RequestedDWARFVersion == 0 &&
4549       DebugInfoKind == llvm::codegenoptions::DebugDirectivesOnly)
4550     DebugInfoKind = llvm::codegenoptions::NoDebugInfo;
4551 
4552   // strict DWARF is set to false by default. But for DBX, we need it to be set
4553   // as true by default.
4554   if (const Arg *A = Args.getLastArg(options::OPT_gstrict_dwarf))
4555     (void)checkDebugInfoOption(A, Args, D, TC);
4556   if (Args.hasFlag(options::OPT_gstrict_dwarf, options::OPT_gno_strict_dwarf,
4557                    DebuggerTuning == llvm::DebuggerKind::DBX))
4558     CmdArgs.push_back("-gstrict-dwarf");
4559 
4560   // And we handle flag -grecord-gcc-switches later with DWARFDebugFlags.
4561   Args.ClaimAllArgs(options::OPT_g_flags_Group);
4562 
4563   // Column info is included by default for everything except SCE and
4564   // CodeView. Clang doesn't track end columns, just starting columns, which,
4565   // in theory, is fine for CodeView (and PDB).  In practice, however, the
4566   // Microsoft debuggers don't handle missing end columns well, and the AIX
4567   // debugger DBX also doesn't handle the columns well, so it's better not to
4568   // include any column info.
4569   if (const Arg *A = Args.getLastArg(options::OPT_gcolumn_info))
4570     (void)checkDebugInfoOption(A, Args, D, TC);
4571   if (!Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
4572                     !EmitCodeView &&
4573                         (DebuggerTuning != llvm::DebuggerKind::SCE &&
4574                          DebuggerTuning != llvm::DebuggerKind::DBX)))
4575     CmdArgs.push_back("-gno-column-info");
4576 
4577   // FIXME: Move backend command line options to the module.
4578   if (Args.hasFlag(options::OPT_gmodules, options::OPT_gno_modules, false)) {
4579     // If -gline-tables-only or -gline-directives-only is the last option it
4580     // wins.
4581     if (checkDebugInfoOption(Args.getLastArg(options::OPT_gmodules), Args, D,
4582                              TC)) {
4583       if (DebugInfoKind != llvm::codegenoptions::DebugLineTablesOnly &&
4584           DebugInfoKind != llvm::codegenoptions::DebugDirectivesOnly) {
4585         DebugInfoKind = llvm::codegenoptions::DebugInfoConstructor;
4586         CmdArgs.push_back("-dwarf-ext-refs");
4587         CmdArgs.push_back("-fmodule-format=obj");
4588       }
4589     }
4590   }
4591 
4592   if (T.isOSBinFormatELF() && SplitDWARFInlining)
4593     CmdArgs.push_back("-fsplit-dwarf-inlining");
4594 
4595   // After we've dealt with all combinations of things that could
4596   // make DebugInfoKind be other than None or DebugLineTablesOnly,
4597   // figure out if we need to "upgrade" it to standalone debug info.
4598   // We parse these two '-f' options whether or not they will be used,
4599   // to claim them even if you wrote "-fstandalone-debug -gline-tables-only"
4600   bool NeedFullDebug = Args.hasFlag(
4601       options::OPT_fstandalone_debug, options::OPT_fno_standalone_debug,
4602       DebuggerTuning == llvm::DebuggerKind::LLDB ||
4603           TC.GetDefaultStandaloneDebug());
4604   if (const Arg *A = Args.getLastArg(options::OPT_fstandalone_debug))
4605     (void)checkDebugInfoOption(A, Args, D, TC);
4606 
4607   if (DebugInfoKind == llvm::codegenoptions::LimitedDebugInfo ||
4608       DebugInfoKind == llvm::codegenoptions::DebugInfoConstructor) {
4609     if (Args.hasFlag(options::OPT_fno_eliminate_unused_debug_types,
4610                      options::OPT_feliminate_unused_debug_types, false))
4611       DebugInfoKind = llvm::codegenoptions::UnusedTypeInfo;
4612     else if (NeedFullDebug)
4613       DebugInfoKind = llvm::codegenoptions::FullDebugInfo;
4614   }
4615 
4616   if (Args.hasFlag(options::OPT_gembed_source, options::OPT_gno_embed_source,
4617                    false)) {
4618     // Source embedding is a vendor extension to DWARF v5. By now we have
4619     // checked if a DWARF version was stated explicitly, and have otherwise
4620     // fallen back to the target default, so if this is still not at least 5
4621     // we emit an error.
4622     const Arg *A = Args.getLastArg(options::OPT_gembed_source);
4623     if (RequestedDWARFVersion < 5)
4624       D.Diag(diag::err_drv_argument_only_allowed_with)
4625           << A->getAsString(Args) << "-gdwarf-5";
4626     else if (EffectiveDWARFVersion < 5)
4627       // The toolchain has reduced allowed dwarf version, so we can't enable
4628       // -gembed-source.
4629       D.Diag(diag::warn_drv_dwarf_version_limited_by_target)
4630           << A->getAsString(Args) << TC.getTripleString() << 5
4631           << EffectiveDWARFVersion;
4632     else if (checkDebugInfoOption(A, Args, D, TC))
4633       CmdArgs.push_back("-gembed-source");
4634   }
4635 
4636   if (EmitCodeView) {
4637     CmdArgs.push_back("-gcodeview");
4638 
4639     Args.addOptInFlag(CmdArgs, options::OPT_gcodeview_ghash,
4640                       options::OPT_gno_codeview_ghash);
4641 
4642     Args.addOptOutFlag(CmdArgs, options::OPT_gcodeview_command_line,
4643                        options::OPT_gno_codeview_command_line);
4644   }
4645 
4646   Args.addOptOutFlag(CmdArgs, options::OPT_ginline_line_tables,
4647                      options::OPT_gno_inline_line_tables);
4648 
4649   // When emitting remarks, we need at least debug lines in the output.
4650   if (willEmitRemarks(Args) &&
4651       DebugInfoKind <= llvm::codegenoptions::DebugDirectivesOnly)
4652     DebugInfoKind = llvm::codegenoptions::DebugLineTablesOnly;
4653 
4654   // Adjust the debug info kind for the given toolchain.
4655   TC.adjustDebugInfoKind(DebugInfoKind, Args);
4656 
4657   // On AIX, the debugger tuning option can be omitted if it is not explicitly
4658   // set.
4659   RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, EffectiveDWARFVersion,
4660                           T.isOSAIX() && !HasDebuggerTuning
4661                               ? llvm::DebuggerKind::Default
4662                               : DebuggerTuning);
4663 
4664   // -fdebug-macro turns on macro debug info generation.
4665   if (Args.hasFlag(options::OPT_fdebug_macro, options::OPT_fno_debug_macro,
4666                    false))
4667     if (checkDebugInfoOption(Args.getLastArg(options::OPT_fdebug_macro), Args,
4668                              D, TC))
4669       CmdArgs.push_back("-debug-info-macro");
4670 
4671   // -ggnu-pubnames turns on gnu style pubnames in the backend.
4672   const auto *PubnamesArg =
4673       Args.getLastArg(options::OPT_ggnu_pubnames, options::OPT_gno_gnu_pubnames,
4674                       options::OPT_gpubnames, options::OPT_gno_pubnames);
4675   if (DwarfFission != DwarfFissionKind::None ||
4676       (PubnamesArg && checkDebugInfoOption(PubnamesArg, Args, D, TC))) {
4677     const bool OptionSet =
4678         (PubnamesArg &&
4679          (PubnamesArg->getOption().matches(options::OPT_gpubnames) ||
4680           PubnamesArg->getOption().matches(options::OPT_ggnu_pubnames)));
4681     if ((DebuggerTuning != llvm::DebuggerKind::LLDB || OptionSet) &&
4682         (!PubnamesArg ||
4683          (!PubnamesArg->getOption().matches(options::OPT_gno_gnu_pubnames) &&
4684           !PubnamesArg->getOption().matches(options::OPT_gno_pubnames))))
4685       CmdArgs.push_back(PubnamesArg && PubnamesArg->getOption().matches(
4686                                            options::OPT_gpubnames)
4687                             ? "-gpubnames"
4688                             : "-ggnu-pubnames");
4689   }
4690   const auto *SimpleTemplateNamesArg =
4691       Args.getLastArg(options::OPT_gsimple_template_names,
4692                       options::OPT_gno_simple_template_names);
4693   bool ForwardTemplateParams = DebuggerTuning == llvm::DebuggerKind::SCE;
4694   if (SimpleTemplateNamesArg &&
4695       checkDebugInfoOption(SimpleTemplateNamesArg, Args, D, TC)) {
4696     const auto &Opt = SimpleTemplateNamesArg->getOption();
4697     if (Opt.matches(options::OPT_gsimple_template_names)) {
4698       ForwardTemplateParams = true;
4699       CmdArgs.push_back("-gsimple-template-names=simple");
4700     }
4701   }
4702 
4703   // Emit DW_TAG_template_alias for template aliases? True by default for SCE.
4704   bool UseDebugTemplateAlias =
4705       DebuggerTuning == llvm::DebuggerKind::SCE && RequestedDWARFVersion >= 4;
4706   if (const auto *DebugTemplateAlias = Args.getLastArg(
4707           options::OPT_gtemplate_alias, options::OPT_gno_template_alias)) {
4708     // DW_TAG_template_alias is only supported from DWARFv5 but if a user
4709     // asks for it we should let them have it (if the target supports it).
4710     if (checkDebugInfoOption(DebugTemplateAlias, Args, D, TC)) {
4711       const auto &Opt = DebugTemplateAlias->getOption();
4712       UseDebugTemplateAlias = Opt.matches(options::OPT_gtemplate_alias);
4713     }
4714   }
4715   if (UseDebugTemplateAlias)
4716     CmdArgs.push_back("-gtemplate-alias");
4717 
4718   if (const Arg *A = Args.getLastArg(options::OPT_gsrc_hash_EQ)) {
4719     StringRef v = A->getValue();
4720     CmdArgs.push_back(Args.MakeArgString("-gsrc-hash=" + v));
4721   }
4722 
4723   Args.addOptInFlag(CmdArgs, options::OPT_fdebug_ranges_base_address,
4724                     options::OPT_fno_debug_ranges_base_address);
4725 
4726   // -gdwarf-aranges turns on the emission of the aranges section in the
4727   // backend.
4728   // Always enabled for SCE tuning.
4729   bool NeedAranges = DebuggerTuning == llvm::DebuggerKind::SCE;
4730   if (const Arg *A = Args.getLastArg(options::OPT_gdwarf_aranges))
4731     NeedAranges = checkDebugInfoOption(A, Args, D, TC) || NeedAranges;
4732   if (NeedAranges) {
4733     CmdArgs.push_back("-mllvm");
4734     CmdArgs.push_back("-generate-arange-section");
4735   }
4736 
4737   Args.addOptInFlag(CmdArgs, options::OPT_fforce_dwarf_frame,
4738                     options::OPT_fno_force_dwarf_frame);
4739 
4740   bool EnableTypeUnits = false;
4741   if (Args.hasFlag(options::OPT_fdebug_types_section,
4742                    options::OPT_fno_debug_types_section, false)) {
4743     if (!(T.isOSBinFormatELF() || T.isOSBinFormatWasm())) {
4744       D.Diag(diag::err_drv_unsupported_opt_for_target)
4745           << Args.getLastArg(options::OPT_fdebug_types_section)
4746                  ->getAsString(Args)
4747           << T.getTriple();
4748     } else if (checkDebugInfoOption(
4749                    Args.getLastArg(options::OPT_fdebug_types_section), Args, D,
4750                    TC)) {
4751       EnableTypeUnits = true;
4752       CmdArgs.push_back("-mllvm");
4753       CmdArgs.push_back("-generate-type-units");
4754     }
4755   }
4756 
4757   if (const Arg *A =
4758           Args.getLastArg(options::OPT_gomit_unreferenced_methods,
4759                           options::OPT_gno_omit_unreferenced_methods))
4760     (void)checkDebugInfoOption(A, Args, D, TC);
4761   if (Args.hasFlag(options::OPT_gomit_unreferenced_methods,
4762                    options::OPT_gno_omit_unreferenced_methods, false) &&
4763       (DebugInfoKind == llvm::codegenoptions::DebugInfoConstructor ||
4764        DebugInfoKind == llvm::codegenoptions::LimitedDebugInfo) &&
4765       !EnableTypeUnits) {
4766     CmdArgs.push_back("-gomit-unreferenced-methods");
4767   }
4768 
4769   // To avoid join/split of directory+filename, the integrated assembler prefers
4770   // the directory form of .file on all DWARF versions. GNU as doesn't allow the
4771   // form before DWARF v5.
4772   if (!Args.hasFlag(options::OPT_fdwarf_directory_asm,
4773                     options::OPT_fno_dwarf_directory_asm,
4774                     TC.useIntegratedAs() || EffectiveDWARFVersion >= 5))
4775     CmdArgs.push_back("-fno-dwarf-directory-asm");
4776 
4777   // Decide how to render forward declarations of template instantiations.
4778   // SCE wants full descriptions, others just get them in the name.
4779   if (ForwardTemplateParams)
4780     CmdArgs.push_back("-debug-forward-template-params");
4781 
4782   // Do we need to explicitly import anonymous namespaces into the parent
4783   // scope?
4784   if (DebuggerTuning == llvm::DebuggerKind::SCE)
4785     CmdArgs.push_back("-dwarf-explicit-import");
4786 
4787   renderDwarfFormat(D, T, Args, CmdArgs, EffectiveDWARFVersion);
4788   RenderDebugInfoCompressionArgs(Args, CmdArgs, D, TC);
4789 
4790   // This controls whether or not we perform JustMyCode instrumentation.
4791   if (Args.hasFlag(options::OPT_fjmc, options::OPT_fno_jmc, false)) {
4792     if (TC.getTriple().isOSBinFormatELF() || D.IsCLMode()) {
4793       if (DebugInfoKind >= llvm::codegenoptions::DebugInfoConstructor)
4794         CmdArgs.push_back("-fjmc");
4795       else if (D.IsCLMode())
4796         D.Diag(clang::diag::warn_drv_jmc_requires_debuginfo) << "/JMC"
4797                                                              << "'/Zi', '/Z7'";
4798       else
4799         D.Diag(clang::diag::warn_drv_jmc_requires_debuginfo) << "-fjmc"
4800                                                              << "-g";
4801     } else {
4802       D.Diag(clang::diag::warn_drv_fjmc_for_elf_only);
4803     }
4804   }
4805 
4806   // Add in -fdebug-compilation-dir if necessary.
4807   const char *DebugCompilationDir =
4808       addDebugCompDirArg(Args, CmdArgs, D.getVFS());
4809 
4810   addDebugPrefixMapArg(D, TC, Args, CmdArgs);
4811 
4812   // Add the output path to the object file for CodeView debug infos.
4813   if (EmitCodeView && Output.isFilename())
4814     addDebugObjectName(Args, CmdArgs, DebugCompilationDir,
4815                        Output.getFilename());
4816 }
4817 
ProcessVSRuntimeLibrary(const ToolChain & TC,const ArgList & Args,ArgStringList & CmdArgs)4818 static void ProcessVSRuntimeLibrary(const ToolChain &TC, const ArgList &Args,
4819                                     ArgStringList &CmdArgs) {
4820   unsigned RTOptionID = options::OPT__SLASH_MT;
4821 
4822   if (Args.hasArg(options::OPT__SLASH_LDd))
4823     // The /LDd option implies /MTd. The dependent lib part can be overridden,
4824     // but defining _DEBUG is sticky.
4825     RTOptionID = options::OPT__SLASH_MTd;
4826 
4827   if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group))
4828     RTOptionID = A->getOption().getID();
4829 
4830   if (Arg *A = Args.getLastArg(options::OPT_fms_runtime_lib_EQ)) {
4831     RTOptionID = llvm::StringSwitch<unsigned>(A->getValue())
4832                      .Case("static", options::OPT__SLASH_MT)
4833                      .Case("static_dbg", options::OPT__SLASH_MTd)
4834                      .Case("dll", options::OPT__SLASH_MD)
4835                      .Case("dll_dbg", options::OPT__SLASH_MDd)
4836                      .Default(options::OPT__SLASH_MT);
4837   }
4838 
4839   StringRef FlagForCRT;
4840   switch (RTOptionID) {
4841   case options::OPT__SLASH_MD:
4842     if (Args.hasArg(options::OPT__SLASH_LDd))
4843       CmdArgs.push_back("-D_DEBUG");
4844     CmdArgs.push_back("-D_MT");
4845     CmdArgs.push_back("-D_DLL");
4846     FlagForCRT = "--dependent-lib=msvcrt";
4847     break;
4848   case options::OPT__SLASH_MDd:
4849     CmdArgs.push_back("-D_DEBUG");
4850     CmdArgs.push_back("-D_MT");
4851     CmdArgs.push_back("-D_DLL");
4852     FlagForCRT = "--dependent-lib=msvcrtd";
4853     break;
4854   case options::OPT__SLASH_MT:
4855     if (Args.hasArg(options::OPT__SLASH_LDd))
4856       CmdArgs.push_back("-D_DEBUG");
4857     CmdArgs.push_back("-D_MT");
4858     CmdArgs.push_back("-flto-visibility-public-std");
4859     FlagForCRT = "--dependent-lib=libcmt";
4860     break;
4861   case options::OPT__SLASH_MTd:
4862     CmdArgs.push_back("-D_DEBUG");
4863     CmdArgs.push_back("-D_MT");
4864     CmdArgs.push_back("-flto-visibility-public-std");
4865     FlagForCRT = "--dependent-lib=libcmtd";
4866     break;
4867   default:
4868     llvm_unreachable("Unexpected option ID.");
4869   }
4870 
4871   if (Args.hasArg(options::OPT_fms_omit_default_lib)) {
4872     CmdArgs.push_back("-D_VC_NODEFAULTLIB");
4873   } else {
4874     CmdArgs.push_back(FlagForCRT.data());
4875 
4876     // This provides POSIX compatibility (maps 'open' to '_open'), which most
4877     // users want.  The /Za flag to cl.exe turns this off, but it's not
4878     // implemented in clang.
4879     CmdArgs.push_back("--dependent-lib=oldnames");
4880   }
4881 
4882   // All Arm64EC object files implicitly add softintrin.lib. This is necessary
4883   // even if the file doesn't actually refer to any of the routines because
4884   // the CRT itself has incomplete dependency markings.
4885   if (TC.getTriple().isWindowsArm64EC())
4886     CmdArgs.push_back("--dependent-lib=softintrin");
4887 }
4888 
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const4889 void Clang::ConstructJob(Compilation &C, const JobAction &JA,
4890                          const InputInfo &Output, const InputInfoList &Inputs,
4891                          const ArgList &Args, const char *LinkingOutput) const {
4892   const auto &TC = getToolChain();
4893   const llvm::Triple &RawTriple = TC.getTriple();
4894   const llvm::Triple &Triple = TC.getEffectiveTriple();
4895   const std::string &TripleStr = Triple.getTriple();
4896 
4897   bool KernelOrKext =
4898       Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
4899   const Driver &D = TC.getDriver();
4900   ArgStringList CmdArgs;
4901 
4902   assert(Inputs.size() >= 1 && "Must have at least one input.");
4903   // CUDA/HIP compilation may have multiple inputs (source file + results of
4904   // device-side compilations). OpenMP device jobs also take the host IR as a
4905   // second input. Module precompilation accepts a list of header files to
4906   // include as part of the module. API extraction accepts a list of header
4907   // files whose API information is emitted in the output. All other jobs are
4908   // expected to have exactly one input.
4909   bool IsCuda = JA.isOffloading(Action::OFK_Cuda);
4910   bool IsCudaDevice = JA.isDeviceOffloading(Action::OFK_Cuda);
4911   bool IsHIP = JA.isOffloading(Action::OFK_HIP);
4912   bool IsHIPDevice = JA.isDeviceOffloading(Action::OFK_HIP);
4913   bool IsOpenMPDevice = JA.isDeviceOffloading(Action::OFK_OpenMP);
4914   bool IsExtractAPI = isa<ExtractAPIJobAction>(JA);
4915   bool IsDeviceOffloadAction = !(JA.isDeviceOffloading(Action::OFK_None) ||
4916                                  JA.isDeviceOffloading(Action::OFK_Host));
4917   bool IsHostOffloadingAction =
4918       JA.isHostOffloading(Action::OFK_OpenMP) ||
4919       (JA.isHostOffloading(C.getActiveOffloadKinds()) &&
4920        Args.hasFlag(options::OPT_offload_new_driver,
4921                     options::OPT_no_offload_new_driver, false));
4922 
4923   bool IsRDCMode =
4924       Args.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc, false);
4925   bool IsUsingLTO = D.isUsingLTO(IsDeviceOffloadAction);
4926   auto LTOMode = D.getLTOMode(IsDeviceOffloadAction);
4927 
4928   // Extract API doesn't have a main input file, so invent a fake one as a
4929   // placeholder.
4930   InputInfo ExtractAPIPlaceholderInput(Inputs[0].getType(), "extract-api",
4931                                        "extract-api");
4932 
4933   const InputInfo &Input =
4934       IsExtractAPI ? ExtractAPIPlaceholderInput : Inputs[0];
4935 
4936   InputInfoList ExtractAPIInputs;
4937   InputInfoList HostOffloadingInputs;
4938   const InputInfo *CudaDeviceInput = nullptr;
4939   const InputInfo *OpenMPDeviceInput = nullptr;
4940   for (const InputInfo &I : Inputs) {
4941     if (&I == &Input || I.getType() == types::TY_Nothing) {
4942       // This is the primary input or contains nothing.
4943     } else if (IsExtractAPI) {
4944       auto ExpectedInputType = ExtractAPIPlaceholderInput.getType();
4945       if (I.getType() != ExpectedInputType) {
4946         D.Diag(diag::err_drv_extract_api_wrong_kind)
4947             << I.getFilename() << types::getTypeName(I.getType())
4948             << types::getTypeName(ExpectedInputType);
4949       }
4950       ExtractAPIInputs.push_back(I);
4951     } else if (IsHostOffloadingAction) {
4952       HostOffloadingInputs.push_back(I);
4953     } else if ((IsCuda || IsHIP) && !CudaDeviceInput) {
4954       CudaDeviceInput = &I;
4955     } else if (IsOpenMPDevice && !OpenMPDeviceInput) {
4956       OpenMPDeviceInput = &I;
4957     } else {
4958       llvm_unreachable("unexpectedly given multiple inputs");
4959     }
4960   }
4961 
4962   const llvm::Triple *AuxTriple =
4963       (IsCuda || IsHIP) ? TC.getAuxTriple() : nullptr;
4964   bool IsWindowsMSVC = RawTriple.isWindowsMSVCEnvironment();
4965   bool IsIAMCU = RawTriple.isOSIAMCU();
4966 
4967   // Adjust IsWindowsXYZ for CUDA/HIP compilations.  Even when compiling in
4968   // device mode (i.e., getToolchain().getTriple() is NVPTX/AMDGCN, not
4969   // Windows), we need to pass Windows-specific flags to cc1.
4970   if (IsCuda || IsHIP)
4971     IsWindowsMSVC |= AuxTriple && AuxTriple->isWindowsMSVCEnvironment();
4972 
4973   // C++ is not supported for IAMCU.
4974   if (IsIAMCU && types::isCXX(Input.getType()))
4975     D.Diag(diag::err_drv_clang_unsupported) << "C++ for IAMCU";
4976 
4977   // Invoke ourselves in -cc1 mode.
4978   //
4979   // FIXME: Implement custom jobs for internal actions.
4980   CmdArgs.push_back("-cc1");
4981 
4982   // Add the "effective" target triple.
4983   CmdArgs.push_back("-triple");
4984   CmdArgs.push_back(Args.MakeArgString(TripleStr));
4985 
4986   if (const Arg *MJ = Args.getLastArg(options::OPT_MJ)) {
4987     DumpCompilationDatabase(C, MJ->getValue(), TripleStr, Output, Input, Args);
4988     Args.ClaimAllArgs(options::OPT_MJ);
4989   } else if (const Arg *GenCDBFragment =
4990                  Args.getLastArg(options::OPT_gen_cdb_fragment_path)) {
4991     DumpCompilationDatabaseFragmentToDir(GenCDBFragment->getValue(), C,
4992                                          TripleStr, Output, Input, Args);
4993     Args.ClaimAllArgs(options::OPT_gen_cdb_fragment_path);
4994   }
4995 
4996   if (IsCuda || IsHIP) {
4997     // We have to pass the triple of the host if compiling for a CUDA/HIP device
4998     // and vice-versa.
4999     std::string NormalizedTriple;
5000     if (JA.isDeviceOffloading(Action::OFK_Cuda) ||
5001         JA.isDeviceOffloading(Action::OFK_HIP))
5002       NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Host>()
5003                              ->getTriple()
5004                              .normalize();
5005     else {
5006       // Host-side compilation.
5007       NormalizedTriple =
5008           (IsCuda ? C.getSingleOffloadToolChain<Action::OFK_Cuda>()
5009                   : C.getSingleOffloadToolChain<Action::OFK_HIP>())
5010               ->getTriple()
5011               .normalize();
5012       if (IsCuda) {
5013         // We need to figure out which CUDA version we're compiling for, as that
5014         // determines how we load and launch GPU kernels.
5015         auto *CTC = static_cast<const toolchains::CudaToolChain *>(
5016             C.getSingleOffloadToolChain<Action::OFK_Cuda>());
5017         assert(CTC && "Expected valid CUDA Toolchain.");
5018         if (CTC && CTC->CudaInstallation.version() != CudaVersion::UNKNOWN)
5019           CmdArgs.push_back(Args.MakeArgString(
5020               Twine("-target-sdk-version=") +
5021               CudaVersionToString(CTC->CudaInstallation.version())));
5022         // Unsized function arguments used for variadics were introduced in
5023         // CUDA-9.0. We still do not support generating code that actually uses
5024         // variadic arguments yet, but we do need to allow parsing them as
5025         // recent CUDA headers rely on that.
5026         // https://github.com/llvm/llvm-project/issues/58410
5027         if (CTC->CudaInstallation.version() >= CudaVersion::CUDA_90)
5028           CmdArgs.push_back("-fcuda-allow-variadic-functions");
5029       }
5030     }
5031     CmdArgs.push_back("-aux-triple");
5032     CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
5033 
5034     if (JA.isDeviceOffloading(Action::OFK_HIP) &&
5035         (getToolChain().getTriple().isAMDGPU() ||
5036          (getToolChain().getTriple().isSPIRV() &&
5037           getToolChain().getTriple().getVendor() == llvm::Triple::AMD))) {
5038       // Device side compilation printf
5039       if (Args.getLastArg(options::OPT_mprintf_kind_EQ)) {
5040         CmdArgs.push_back(Args.MakeArgString(
5041             "-mprintf-kind=" +
5042             Args.getLastArgValue(options::OPT_mprintf_kind_EQ)));
5043         // Force compiler error on invalid conversion specifiers
5044         CmdArgs.push_back(
5045             Args.MakeArgString("-Werror=format-invalid-specifier"));
5046       }
5047     }
5048   }
5049 
5050   // Unconditionally claim the printf option now to avoid unused diagnostic.
5051   if (const Arg *PF = Args.getLastArg(options::OPT_mprintf_kind_EQ))
5052     PF->claim();
5053 
5054   if (Args.hasFlag(options::OPT_fsycl, options::OPT_fno_sycl, false)) {
5055     CmdArgs.push_back("-fsycl-is-device");
5056 
5057     if (Arg *A = Args.getLastArg(options::OPT_sycl_std_EQ)) {
5058       A->render(Args, CmdArgs);
5059     } else {
5060       // Ensure the default version in SYCL mode is 2020.
5061       CmdArgs.push_back("-sycl-std=2020");
5062     }
5063   }
5064 
5065   if (IsOpenMPDevice) {
5066     // We have to pass the triple of the host if compiling for an OpenMP device.
5067     std::string NormalizedTriple =
5068         C.getSingleOffloadToolChain<Action::OFK_Host>()
5069             ->getTriple()
5070             .normalize();
5071     CmdArgs.push_back("-aux-triple");
5072     CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
5073   }
5074 
5075   if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm ||
5076                                Triple.getArch() == llvm::Triple::thumb)) {
5077     unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6;
5078     unsigned Version = 0;
5079     bool Failure =
5080         Triple.getArchName().substr(Offset).consumeInteger(10, Version);
5081     if (Failure || Version < 7)
5082       D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName()
5083                                                 << TripleStr;
5084   }
5085 
5086   // Push all default warning arguments that are specific to
5087   // the given target.  These come before user provided warning options
5088   // are provided.
5089   TC.addClangWarningOptions(CmdArgs);
5090 
5091   // FIXME: Subclass ToolChain for SPIR and move this to addClangWarningOptions.
5092   if (Triple.isSPIR() || Triple.isSPIRV())
5093     CmdArgs.push_back("-Wspir-compat");
5094 
5095   // Select the appropriate action.
5096   RewriteKind rewriteKind = RK_None;
5097 
5098   bool UnifiedLTO = false;
5099   if (IsUsingLTO) {
5100     UnifiedLTO = Args.hasFlag(options::OPT_funified_lto,
5101                               options::OPT_fno_unified_lto, Triple.isPS());
5102     if (UnifiedLTO)
5103       CmdArgs.push_back("-funified-lto");
5104   }
5105 
5106   // If CollectArgsForIntegratedAssembler() isn't called below, claim the args
5107   // it claims when not running an assembler. Otherwise, clang would emit
5108   // "argument unused" warnings for assembler flags when e.g. adding "-E" to
5109   // flags while debugging something. That'd be somewhat inconvenient, and it's
5110   // also inconsistent with most other flags -- we don't warn on
5111   // -ffunction-sections not being used in -E mode either for example, even
5112   // though it's not really used either.
5113   if (!isa<AssembleJobAction>(JA)) {
5114     // The args claimed here should match the args used in
5115     // CollectArgsForIntegratedAssembler().
5116     if (TC.useIntegratedAs()) {
5117       Args.ClaimAllArgs(options::OPT_mrelax_all);
5118       Args.ClaimAllArgs(options::OPT_mno_relax_all);
5119       Args.ClaimAllArgs(options::OPT_mincremental_linker_compatible);
5120       Args.ClaimAllArgs(options::OPT_mno_incremental_linker_compatible);
5121       switch (C.getDefaultToolChain().getArch()) {
5122       case llvm::Triple::arm:
5123       case llvm::Triple::armeb:
5124       case llvm::Triple::thumb:
5125       case llvm::Triple::thumbeb:
5126         Args.ClaimAllArgs(options::OPT_mimplicit_it_EQ);
5127         break;
5128       default:
5129         break;
5130       }
5131     }
5132     Args.ClaimAllArgs(options::OPT_Wa_COMMA);
5133     Args.ClaimAllArgs(options::OPT_Xassembler);
5134     Args.ClaimAllArgs(options::OPT_femit_dwarf_unwind_EQ);
5135   }
5136 
5137   if (isa<AnalyzeJobAction>(JA)) {
5138     assert(JA.getType() == types::TY_Plist && "Invalid output type.");
5139     CmdArgs.push_back("-analyze");
5140   } else if (isa<MigrateJobAction>(JA)) {
5141     CmdArgs.push_back("-migrate");
5142   } else if (isa<PreprocessJobAction>(JA)) {
5143     if (Output.getType() == types::TY_Dependencies)
5144       CmdArgs.push_back("-Eonly");
5145     else {
5146       CmdArgs.push_back("-E");
5147       if (Args.hasArg(options::OPT_rewrite_objc) &&
5148           !Args.hasArg(options::OPT_g_Group))
5149         CmdArgs.push_back("-P");
5150       else if (JA.getType() == types::TY_PP_CXXHeaderUnit)
5151         CmdArgs.push_back("-fdirectives-only");
5152     }
5153   } else if (isa<AssembleJobAction>(JA)) {
5154     CmdArgs.push_back("-emit-obj");
5155 
5156     CollectArgsForIntegratedAssembler(C, Args, CmdArgs, D);
5157 
5158     // Also ignore explicit -force_cpusubtype_ALL option.
5159     (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
5160   } else if (isa<PrecompileJobAction>(JA)) {
5161     if (JA.getType() == types::TY_Nothing)
5162       CmdArgs.push_back("-fsyntax-only");
5163     else if (JA.getType() == types::TY_ModuleFile)
5164       CmdArgs.push_back("-emit-module-interface");
5165     else if (JA.getType() == types::TY_HeaderUnit)
5166       CmdArgs.push_back("-emit-header-unit");
5167     else
5168       CmdArgs.push_back("-emit-pch");
5169   } else if (isa<VerifyPCHJobAction>(JA)) {
5170     CmdArgs.push_back("-verify-pch");
5171   } else if (isa<ExtractAPIJobAction>(JA)) {
5172     assert(JA.getType() == types::TY_API_INFO &&
5173            "Extract API actions must generate a API information.");
5174     CmdArgs.push_back("-extract-api");
5175 
5176     if (Arg *PrettySGFArg = Args.getLastArg(options::OPT_emit_pretty_sgf))
5177       PrettySGFArg->render(Args, CmdArgs);
5178 
5179     Arg *SymbolGraphDirArg = Args.getLastArg(options::OPT_symbol_graph_dir_EQ);
5180 
5181     if (Arg *ProductNameArg = Args.getLastArg(options::OPT_product_name_EQ))
5182       ProductNameArg->render(Args, CmdArgs);
5183     if (Arg *ExtractAPIIgnoresFileArg =
5184             Args.getLastArg(options::OPT_extract_api_ignores_EQ))
5185       ExtractAPIIgnoresFileArg->render(Args, CmdArgs);
5186     if (Arg *EmitExtensionSymbolGraphs =
5187             Args.getLastArg(options::OPT_emit_extension_symbol_graphs)) {
5188       if (!SymbolGraphDirArg)
5189         D.Diag(diag::err_drv_missing_symbol_graph_dir);
5190 
5191       EmitExtensionSymbolGraphs->render(Args, CmdArgs);
5192     }
5193     if (SymbolGraphDirArg)
5194       SymbolGraphDirArg->render(Args, CmdArgs);
5195   } else {
5196     assert((isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) &&
5197            "Invalid action for clang tool.");
5198     if (JA.getType() == types::TY_Nothing) {
5199       CmdArgs.push_back("-fsyntax-only");
5200     } else if (JA.getType() == types::TY_LLVM_IR ||
5201                JA.getType() == types::TY_LTO_IR) {
5202       CmdArgs.push_back("-emit-llvm");
5203     } else if (JA.getType() == types::TY_LLVM_BC ||
5204                JA.getType() == types::TY_LTO_BC) {
5205       // Emit textual llvm IR for AMDGPU offloading for -emit-llvm -S
5206       if (Triple.isAMDGCN() && IsOpenMPDevice && Args.hasArg(options::OPT_S) &&
5207           Args.hasArg(options::OPT_emit_llvm)) {
5208         CmdArgs.push_back("-emit-llvm");
5209       } else {
5210         CmdArgs.push_back("-emit-llvm-bc");
5211       }
5212     } else if (JA.getType() == types::TY_IFS ||
5213                JA.getType() == types::TY_IFS_CPP) {
5214       StringRef ArgStr =
5215           Args.hasArg(options::OPT_interface_stub_version_EQ)
5216               ? Args.getLastArgValue(options::OPT_interface_stub_version_EQ)
5217               : "ifs-v1";
5218       CmdArgs.push_back("-emit-interface-stubs");
5219       CmdArgs.push_back(
5220           Args.MakeArgString(Twine("-interface-stub-version=") + ArgStr.str()));
5221     } else if (JA.getType() == types::TY_PP_Asm) {
5222       CmdArgs.push_back("-S");
5223     } else if (JA.getType() == types::TY_AST) {
5224       CmdArgs.push_back("-emit-pch");
5225     } else if (JA.getType() == types::TY_ModuleFile) {
5226       CmdArgs.push_back("-module-file-info");
5227     } else if (JA.getType() == types::TY_RewrittenObjC) {
5228       CmdArgs.push_back("-rewrite-objc");
5229       rewriteKind = RK_NonFragile;
5230     } else if (JA.getType() == types::TY_RewrittenLegacyObjC) {
5231       CmdArgs.push_back("-rewrite-objc");
5232       rewriteKind = RK_Fragile;
5233     } else {
5234       assert(JA.getType() == types::TY_PP_Asm && "Unexpected output type!");
5235     }
5236 
5237     // Preserve use-list order by default when emitting bitcode, so that
5238     // loading the bitcode up in 'opt' or 'llc' and running passes gives the
5239     // same result as running passes here.  For LTO, we don't need to preserve
5240     // the use-list order, since serialization to bitcode is part of the flow.
5241     if (JA.getType() == types::TY_LLVM_BC)
5242       CmdArgs.push_back("-emit-llvm-uselists");
5243 
5244     if (IsUsingLTO) {
5245       if (IsDeviceOffloadAction && !JA.isDeviceOffloading(Action::OFK_OpenMP) &&
5246           !Args.hasFlag(options::OPT_offload_new_driver,
5247                         options::OPT_no_offload_new_driver, false) &&
5248           !Triple.isAMDGPU()) {
5249         D.Diag(diag::err_drv_unsupported_opt_for_target)
5250             << Args.getLastArg(options::OPT_foffload_lto,
5251                                options::OPT_foffload_lto_EQ)
5252                    ->getAsString(Args)
5253             << Triple.getTriple();
5254       } else if (Triple.isNVPTX() && !IsRDCMode &&
5255                  JA.isDeviceOffloading(Action::OFK_Cuda)) {
5256         D.Diag(diag::err_drv_unsupported_opt_for_language_mode)
5257             << Args.getLastArg(options::OPT_foffload_lto,
5258                                options::OPT_foffload_lto_EQ)
5259                    ->getAsString(Args)
5260             << "-fno-gpu-rdc";
5261       } else {
5262         assert(LTOMode == LTOK_Full || LTOMode == LTOK_Thin);
5263         CmdArgs.push_back(Args.MakeArgString(
5264             Twine("-flto=") + (LTOMode == LTOK_Thin ? "thin" : "full")));
5265         // PS4 uses the legacy LTO API, which does not support some of the
5266         // features enabled by -flto-unit.
5267         if (!RawTriple.isPS4() ||
5268             (D.getLTOMode() == LTOK_Full) || !UnifiedLTO)
5269           CmdArgs.push_back("-flto-unit");
5270       }
5271     }
5272   }
5273 
5274   Args.AddLastArg(CmdArgs, options::OPT_dumpdir);
5275 
5276   if (const Arg *A = Args.getLastArg(options::OPT_fthinlto_index_EQ)) {
5277     if (!types::isLLVMIR(Input.getType()))
5278       D.Diag(diag::err_drv_arg_requires_bitcode_input) << A->getAsString(Args);
5279     Args.AddLastArg(CmdArgs, options::OPT_fthinlto_index_EQ);
5280   }
5281 
5282   if (Triple.isPPC())
5283     Args.addOptInFlag(CmdArgs, options::OPT_mregnames,
5284                       options::OPT_mno_regnames);
5285 
5286   if (Args.getLastArg(options::OPT_fthin_link_bitcode_EQ))
5287     Args.AddLastArg(CmdArgs, options::OPT_fthin_link_bitcode_EQ);
5288 
5289   if (Args.getLastArg(options::OPT_save_temps_EQ))
5290     Args.AddLastArg(CmdArgs, options::OPT_save_temps_EQ);
5291 
5292   auto *MemProfArg = Args.getLastArg(options::OPT_fmemory_profile,
5293                                      options::OPT_fmemory_profile_EQ,
5294                                      options::OPT_fno_memory_profile);
5295   if (MemProfArg &&
5296       !MemProfArg->getOption().matches(options::OPT_fno_memory_profile))
5297     MemProfArg->render(Args, CmdArgs);
5298 
5299   if (auto *MemProfUseArg =
5300           Args.getLastArg(options::OPT_fmemory_profile_use_EQ)) {
5301     if (MemProfArg)
5302       D.Diag(diag::err_drv_argument_not_allowed_with)
5303           << MemProfUseArg->getAsString(Args) << MemProfArg->getAsString(Args);
5304     if (auto *PGOInstrArg = Args.getLastArg(options::OPT_fprofile_generate,
5305                                             options::OPT_fprofile_generate_EQ))
5306       D.Diag(diag::err_drv_argument_not_allowed_with)
5307           << MemProfUseArg->getAsString(Args) << PGOInstrArg->getAsString(Args);
5308     MemProfUseArg->render(Args, CmdArgs);
5309   }
5310 
5311   // Embed-bitcode option.
5312   // Only white-listed flags below are allowed to be embedded.
5313   if (C.getDriver().embedBitcodeInObject() && !IsUsingLTO &&
5314       (isa<BackendJobAction>(JA) || isa<AssembleJobAction>(JA))) {
5315     // Add flags implied by -fembed-bitcode.
5316     Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
5317     // Disable all llvm IR level optimizations.
5318     CmdArgs.push_back("-disable-llvm-passes");
5319 
5320     // Render target options.
5321     TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind());
5322 
5323     // reject options that shouldn't be supported in bitcode
5324     // also reject kernel/kext
5325     static const constexpr unsigned kBitcodeOptionIgnorelist[] = {
5326         options::OPT_mkernel,
5327         options::OPT_fapple_kext,
5328         options::OPT_ffunction_sections,
5329         options::OPT_fno_function_sections,
5330         options::OPT_fdata_sections,
5331         options::OPT_fno_data_sections,
5332         options::OPT_fbasic_block_sections_EQ,
5333         options::OPT_funique_internal_linkage_names,
5334         options::OPT_fno_unique_internal_linkage_names,
5335         options::OPT_funique_section_names,
5336         options::OPT_fno_unique_section_names,
5337         options::OPT_funique_basic_block_section_names,
5338         options::OPT_fno_unique_basic_block_section_names,
5339         options::OPT_mrestrict_it,
5340         options::OPT_mno_restrict_it,
5341         options::OPT_mstackrealign,
5342         options::OPT_mno_stackrealign,
5343         options::OPT_mstack_alignment,
5344         options::OPT_mcmodel_EQ,
5345         options::OPT_mlong_calls,
5346         options::OPT_mno_long_calls,
5347         options::OPT_ggnu_pubnames,
5348         options::OPT_gdwarf_aranges,
5349         options::OPT_fdebug_types_section,
5350         options::OPT_fno_debug_types_section,
5351         options::OPT_fdwarf_directory_asm,
5352         options::OPT_fno_dwarf_directory_asm,
5353         options::OPT_mrelax_all,
5354         options::OPT_mno_relax_all,
5355         options::OPT_ftrap_function_EQ,
5356         options::OPT_ffixed_r9,
5357         options::OPT_mfix_cortex_a53_835769,
5358         options::OPT_mno_fix_cortex_a53_835769,
5359         options::OPT_ffixed_x18,
5360         options::OPT_mglobal_merge,
5361         options::OPT_mno_global_merge,
5362         options::OPT_mred_zone,
5363         options::OPT_mno_red_zone,
5364         options::OPT_Wa_COMMA,
5365         options::OPT_Xassembler,
5366         options::OPT_mllvm,
5367     };
5368     for (const auto &A : Args)
5369       if (llvm::is_contained(kBitcodeOptionIgnorelist, A->getOption().getID()))
5370         D.Diag(diag::err_drv_unsupported_embed_bitcode) << A->getSpelling();
5371 
5372     // Render the CodeGen options that need to be passed.
5373     Args.addOptOutFlag(CmdArgs, options::OPT_foptimize_sibling_calls,
5374                        options::OPT_fno_optimize_sibling_calls);
5375 
5376     RenderFloatingPointOptions(TC, D, isOptimizationLevelFast(Args), Args,
5377                                CmdArgs, JA);
5378 
5379     // Render ABI arguments
5380     switch (TC.getArch()) {
5381     default: break;
5382     case llvm::Triple::arm:
5383     case llvm::Triple::armeb:
5384     case llvm::Triple::thumbeb:
5385       RenderARMABI(D, Triple, Args, CmdArgs);
5386       break;
5387     case llvm::Triple::aarch64:
5388     case llvm::Triple::aarch64_32:
5389     case llvm::Triple::aarch64_be:
5390       RenderAArch64ABI(Triple, Args, CmdArgs);
5391       break;
5392     }
5393 
5394     // Optimization level for CodeGen.
5395     if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) {
5396       if (A->getOption().matches(options::OPT_O4)) {
5397         CmdArgs.push_back("-O3");
5398         D.Diag(diag::warn_O4_is_O3);
5399       } else {
5400         A->render(Args, CmdArgs);
5401       }
5402     }
5403 
5404     // Input/Output file.
5405     if (Output.getType() == types::TY_Dependencies) {
5406       // Handled with other dependency code.
5407     } else if (Output.isFilename()) {
5408       CmdArgs.push_back("-o");
5409       CmdArgs.push_back(Output.getFilename());
5410     } else {
5411       assert(Output.isNothing() && "Input output.");
5412     }
5413 
5414     for (const auto &II : Inputs) {
5415       addDashXForInput(Args, II, CmdArgs);
5416       if (II.isFilename())
5417         CmdArgs.push_back(II.getFilename());
5418       else
5419         II.getInputArg().renderAsInput(Args, CmdArgs);
5420     }
5421 
5422     C.addCommand(std::make_unique<Command>(
5423         JA, *this, ResponseFileSupport::AtFileUTF8(), D.getClangProgramPath(),
5424         CmdArgs, Inputs, Output, D.getPrependArg()));
5425     return;
5426   }
5427 
5428   if (C.getDriver().embedBitcodeMarkerOnly() && !IsUsingLTO)
5429     CmdArgs.push_back("-fembed-bitcode=marker");
5430 
5431   // We normally speed up the clang process a bit by skipping destructors at
5432   // exit, but when we're generating diagnostics we can rely on some of the
5433   // cleanup.
5434   if (!C.isForDiagnostics())
5435     CmdArgs.push_back("-disable-free");
5436   CmdArgs.push_back("-clear-ast-before-backend");
5437 
5438 #ifdef NDEBUG
5439   const bool IsAssertBuild = false;
5440 #else
5441   const bool IsAssertBuild = true;
5442 #endif
5443 
5444   // Disable the verification pass in asserts builds unless otherwise specified.
5445   if (Args.hasFlag(options::OPT_fno_verify_intermediate_code,
5446                    options::OPT_fverify_intermediate_code, !IsAssertBuild)) {
5447     CmdArgs.push_back("-disable-llvm-verifier");
5448   }
5449 
5450   // Discard value names in assert builds unless otherwise specified.
5451   if (Args.hasFlag(options::OPT_fdiscard_value_names,
5452                    options::OPT_fno_discard_value_names, !IsAssertBuild)) {
5453     if (Args.hasArg(options::OPT_fdiscard_value_names) &&
5454         llvm::any_of(Inputs, [](const clang::driver::InputInfo &II) {
5455           return types::isLLVMIR(II.getType());
5456         })) {
5457       D.Diag(diag::warn_ignoring_fdiscard_for_bitcode);
5458     }
5459     CmdArgs.push_back("-discard-value-names");
5460   }
5461 
5462   // Set the main file name, so that debug info works even with
5463   // -save-temps.
5464   CmdArgs.push_back("-main-file-name");
5465   CmdArgs.push_back(getBaseInputName(Args, Input));
5466 
5467   // Some flags which affect the language (via preprocessor
5468   // defines).
5469   if (Args.hasArg(options::OPT_static))
5470     CmdArgs.push_back("-static-define");
5471 
5472   if (Args.hasArg(options::OPT_municode))
5473     CmdArgs.push_back("-DUNICODE");
5474 
5475   if (isa<AnalyzeJobAction>(JA))
5476     RenderAnalyzerOptions(Args, CmdArgs, Triple, Input);
5477 
5478   if (isa<AnalyzeJobAction>(JA) ||
5479       (isa<PreprocessJobAction>(JA) && Args.hasArg(options::OPT__analyze)))
5480     CmdArgs.push_back("-setup-static-analyzer");
5481 
5482   // Enable compatilibily mode to avoid analyzer-config related errors.
5483   // Since we can't access frontend flags through hasArg, let's manually iterate
5484   // through them.
5485   bool FoundAnalyzerConfig = false;
5486   for (auto *Arg : Args.filtered(options::OPT_Xclang))
5487     if (StringRef(Arg->getValue()) == "-analyzer-config") {
5488       FoundAnalyzerConfig = true;
5489       break;
5490     }
5491   if (!FoundAnalyzerConfig)
5492     for (auto *Arg : Args.filtered(options::OPT_Xanalyzer))
5493       if (StringRef(Arg->getValue()) == "-analyzer-config") {
5494         FoundAnalyzerConfig = true;
5495         break;
5496       }
5497   if (FoundAnalyzerConfig)
5498     CmdArgs.push_back("-analyzer-config-compatibility-mode=true");
5499 
5500   CheckCodeGenerationOptions(D, Args);
5501 
5502   unsigned FunctionAlignment = ParseFunctionAlignment(TC, Args);
5503   assert(FunctionAlignment <= 31 && "function alignment will be truncated!");
5504   if (FunctionAlignment) {
5505     CmdArgs.push_back("-function-alignment");
5506     CmdArgs.push_back(Args.MakeArgString(std::to_string(FunctionAlignment)));
5507   }
5508 
5509   // We support -falign-loops=N where N is a power of 2. GCC supports more
5510   // forms.
5511   if (const Arg *A = Args.getLastArg(options::OPT_falign_loops_EQ)) {
5512     unsigned Value = 0;
5513     if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536)
5514       TC.getDriver().Diag(diag::err_drv_invalid_int_value)
5515           << A->getAsString(Args) << A->getValue();
5516     else if (Value & (Value - 1))
5517       TC.getDriver().Diag(diag::err_drv_alignment_not_power_of_two)
5518           << A->getAsString(Args) << A->getValue();
5519     // Treat =0 as unspecified (use the target preference).
5520     if (Value)
5521       CmdArgs.push_back(Args.MakeArgString("-falign-loops=" +
5522                                            Twine(std::min(Value, 65536u))));
5523   }
5524 
5525   if (Triple.isOSzOS()) {
5526     // On z/OS some of the system header feature macros need to
5527     // be defined to enable most cross platform projects to build
5528     // successfully.  Ths include the libc++ library.  A
5529     // complicating factor is that users can define these
5530     // macros to the same or different values.  We need to add
5531     // the definition for these macros to the compilation command
5532     // if the user hasn't already defined them.
5533 
5534     auto findMacroDefinition = [&](const std::string &Macro) {
5535       auto MacroDefs = Args.getAllArgValues(options::OPT_D);
5536       return llvm::any_of(MacroDefs, [&](const std::string &M) {
5537         return M == Macro || M.find(Macro + '=') != std::string::npos;
5538       });
5539     };
5540 
5541     // _UNIX03_WITHDRAWN is required for libcxx & porting.
5542     if (!findMacroDefinition("_UNIX03_WITHDRAWN"))
5543       CmdArgs.push_back("-D_UNIX03_WITHDRAWN");
5544     // _OPEN_DEFAULT is required for XL compat
5545     if (!findMacroDefinition("_OPEN_DEFAULT"))
5546       CmdArgs.push_back("-D_OPEN_DEFAULT");
5547     if (D.CCCIsCXX() || types::isCXX(Input.getType())) {
5548       // _XOPEN_SOURCE=600 is required for libcxx.
5549       if (!findMacroDefinition("_XOPEN_SOURCE"))
5550         CmdArgs.push_back("-D_XOPEN_SOURCE=600");
5551     }
5552   }
5553 
5554   llvm::Reloc::Model RelocationModel;
5555   unsigned PICLevel;
5556   bool IsPIE;
5557   std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(TC, Args);
5558   Arg *LastPICDataRelArg =
5559       Args.getLastArg(options::OPT_mno_pic_data_is_text_relative,
5560                       options::OPT_mpic_data_is_text_relative);
5561   bool NoPICDataIsTextRelative = false;
5562   if (LastPICDataRelArg) {
5563     if (LastPICDataRelArg->getOption().matches(
5564             options::OPT_mno_pic_data_is_text_relative)) {
5565       NoPICDataIsTextRelative = true;
5566       if (!PICLevel)
5567         D.Diag(diag::err_drv_argument_only_allowed_with)
5568             << "-mno-pic-data-is-text-relative"
5569             << "-fpic/-fpie";
5570     }
5571     if (!Triple.isSystemZ())
5572       D.Diag(diag::err_drv_unsupported_opt_for_target)
5573           << (NoPICDataIsTextRelative ? "-mno-pic-data-is-text-relative"
5574                                       : "-mpic-data-is-text-relative")
5575           << RawTriple.str();
5576   }
5577 
5578   bool IsROPI = RelocationModel == llvm::Reloc::ROPI ||
5579                 RelocationModel == llvm::Reloc::ROPI_RWPI;
5580   bool IsRWPI = RelocationModel == llvm::Reloc::RWPI ||
5581                 RelocationModel == llvm::Reloc::ROPI_RWPI;
5582 
5583   if (Args.hasArg(options::OPT_mcmse) &&
5584       !Args.hasArg(options::OPT_fallow_unsupported)) {
5585     if (IsROPI)
5586       D.Diag(diag::err_cmse_pi_are_incompatible) << IsROPI;
5587     if (IsRWPI)
5588       D.Diag(diag::err_cmse_pi_are_incompatible) << !IsRWPI;
5589   }
5590 
5591   if (IsROPI && types::isCXX(Input.getType()) &&
5592       !Args.hasArg(options::OPT_fallow_unsupported))
5593     D.Diag(diag::err_drv_ropi_incompatible_with_cxx);
5594 
5595   const char *RMName = RelocationModelName(RelocationModel);
5596   if (RMName) {
5597     CmdArgs.push_back("-mrelocation-model");
5598     CmdArgs.push_back(RMName);
5599   }
5600   if (PICLevel > 0) {
5601     CmdArgs.push_back("-pic-level");
5602     CmdArgs.push_back(PICLevel == 1 ? "1" : "2");
5603     if (IsPIE)
5604       CmdArgs.push_back("-pic-is-pie");
5605     if (NoPICDataIsTextRelative)
5606       CmdArgs.push_back("-mcmodel=medium");
5607   }
5608 
5609   if (RelocationModel == llvm::Reloc::ROPI ||
5610       RelocationModel == llvm::Reloc::ROPI_RWPI)
5611     CmdArgs.push_back("-fropi");
5612   if (RelocationModel == llvm::Reloc::RWPI ||
5613       RelocationModel == llvm::Reloc::ROPI_RWPI)
5614     CmdArgs.push_back("-frwpi");
5615 
5616   if (Arg *A = Args.getLastArg(options::OPT_meabi)) {
5617     CmdArgs.push_back("-meabi");
5618     CmdArgs.push_back(A->getValue());
5619   }
5620 
5621   // -fsemantic-interposition is forwarded to CC1: set the
5622   // "SemanticInterposition" metadata to 1 (make some linkages interposable) and
5623   // make default visibility external linkage definitions dso_preemptable.
5624   //
5625   // -fno-semantic-interposition: if the target supports .Lfoo$local local
5626   // aliases (make default visibility external linkage definitions dso_local).
5627   // This is the CC1 default for ELF to match COFF/Mach-O.
5628   //
5629   // Otherwise use Clang's traditional behavior: like
5630   // -fno-semantic-interposition but local aliases are not used. So references
5631   // can be interposed if not optimized out.
5632   if (Triple.isOSBinFormatELF()) {
5633     Arg *A = Args.getLastArg(options::OPT_fsemantic_interposition,
5634                              options::OPT_fno_semantic_interposition);
5635     if (RelocationModel != llvm::Reloc::Static && !IsPIE) {
5636       // The supported targets need to call AsmPrinter::getSymbolPreferLocal.
5637       bool SupportsLocalAlias =
5638           Triple.isAArch64() || Triple.isRISCV() || Triple.isX86();
5639       if (!A)
5640         CmdArgs.push_back("-fhalf-no-semantic-interposition");
5641       else if (A->getOption().matches(options::OPT_fsemantic_interposition))
5642         A->render(Args, CmdArgs);
5643       else if (!SupportsLocalAlias)
5644         CmdArgs.push_back("-fhalf-no-semantic-interposition");
5645     }
5646   }
5647 
5648   {
5649     std::string Model;
5650     if (Arg *A = Args.getLastArg(options::OPT_mthread_model)) {
5651       if (!TC.isThreadModelSupported(A->getValue()))
5652         D.Diag(diag::err_drv_invalid_thread_model_for_target)
5653             << A->getValue() << A->getAsString(Args);
5654       Model = A->getValue();
5655     } else
5656       Model = TC.getThreadModel();
5657     if (Model != "posix") {
5658       CmdArgs.push_back("-mthread-model");
5659       CmdArgs.push_back(Args.MakeArgString(Model));
5660     }
5661   }
5662 
5663   if (Arg *A = Args.getLastArg(options::OPT_fveclib)) {
5664     StringRef Name = A->getValue();
5665     if (Name == "SVML") {
5666       if (Triple.getArch() != llvm::Triple::x86 &&
5667           Triple.getArch() != llvm::Triple::x86_64)
5668         D.Diag(diag::err_drv_unsupported_opt_for_target)
5669             << Name << Triple.getArchName();
5670     } else if (Name == "LIBMVEC-X86") {
5671       if (Triple.getArch() != llvm::Triple::x86 &&
5672           Triple.getArch() != llvm::Triple::x86_64)
5673         D.Diag(diag::err_drv_unsupported_opt_for_target)
5674             << Name << Triple.getArchName();
5675     } else if (Name == "SLEEF" || Name == "ArmPL") {
5676       if (Triple.getArch() != llvm::Triple::aarch64 &&
5677           Triple.getArch() != llvm::Triple::aarch64_be)
5678         D.Diag(diag::err_drv_unsupported_opt_for_target)
5679             << Name << Triple.getArchName();
5680     }
5681     A->render(Args, CmdArgs);
5682   }
5683 
5684   if (Args.hasFlag(options::OPT_fmerge_all_constants,
5685                    options::OPT_fno_merge_all_constants, false))
5686     CmdArgs.push_back("-fmerge-all-constants");
5687 
5688   Args.addOptOutFlag(CmdArgs, options::OPT_fdelete_null_pointer_checks,
5689                      options::OPT_fno_delete_null_pointer_checks);
5690 
5691   // LLVM Code Generator Options.
5692 
5693   if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ_quadword_atomics)) {
5694     if (!Triple.isOSAIX() || Triple.isPPC32())
5695       D.Diag(diag::err_drv_unsupported_opt_for_target)
5696         << A->getSpelling() << RawTriple.str();
5697     CmdArgs.push_back("-mabi=quadword-atomics");
5698   }
5699 
5700   if (Arg *A = Args.getLastArg(options::OPT_mlong_double_128)) {
5701     // Emit the unsupported option error until the Clang's library integration
5702     // support for 128-bit long double is available for AIX.
5703     if (Triple.isOSAIX())
5704       D.Diag(diag::err_drv_unsupported_opt_for_target)
5705           << A->getSpelling() << RawTriple.str();
5706   }
5707 
5708   if (Arg *A = Args.getLastArg(options::OPT_Wframe_larger_than_EQ)) {
5709     StringRef V = A->getValue(), V1 = V;
5710     unsigned Size;
5711     if (V1.consumeInteger(10, Size) || !V1.empty())
5712       D.Diag(diag::err_drv_invalid_argument_to_option)
5713           << V << A->getOption().getName();
5714     else
5715       CmdArgs.push_back(Args.MakeArgString("-fwarn-stack-size=" + V));
5716   }
5717 
5718   Args.addOptOutFlag(CmdArgs, options::OPT_fjump_tables,
5719                      options::OPT_fno_jump_tables);
5720   Args.addOptInFlag(CmdArgs, options::OPT_fprofile_sample_accurate,
5721                     options::OPT_fno_profile_sample_accurate);
5722   Args.addOptOutFlag(CmdArgs, options::OPT_fpreserve_as_comments,
5723                      options::OPT_fno_preserve_as_comments);
5724 
5725   if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
5726     CmdArgs.push_back("-mregparm");
5727     CmdArgs.push_back(A->getValue());
5728   }
5729 
5730   if (Arg *A = Args.getLastArg(options::OPT_maix_struct_return,
5731                                options::OPT_msvr4_struct_return)) {
5732     if (!TC.getTriple().isPPC32()) {
5733       D.Diag(diag::err_drv_unsupported_opt_for_target)
5734           << A->getSpelling() << RawTriple.str();
5735     } else if (A->getOption().matches(options::OPT_maix_struct_return)) {
5736       CmdArgs.push_back("-maix-struct-return");
5737     } else {
5738       assert(A->getOption().matches(options::OPT_msvr4_struct_return));
5739       CmdArgs.push_back("-msvr4-struct-return");
5740     }
5741   }
5742 
5743   if (Arg *A = Args.getLastArg(options::OPT_fpcc_struct_return,
5744                                options::OPT_freg_struct_return)) {
5745     if (TC.getArch() != llvm::Triple::x86) {
5746       D.Diag(diag::err_drv_unsupported_opt_for_target)
5747           << A->getSpelling() << RawTriple.str();
5748     } else if (A->getOption().matches(options::OPT_fpcc_struct_return)) {
5749       CmdArgs.push_back("-fpcc-struct-return");
5750     } else {
5751       assert(A->getOption().matches(options::OPT_freg_struct_return));
5752       CmdArgs.push_back("-freg-struct-return");
5753     }
5754   }
5755 
5756   if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false)) {
5757     if (Triple.getArch() == llvm::Triple::m68k)
5758       CmdArgs.push_back("-fdefault-calling-conv=rtdcall");
5759     else
5760       CmdArgs.push_back("-fdefault-calling-conv=stdcall");
5761   }
5762 
5763   if (Args.hasArg(options::OPT_fenable_matrix)) {
5764     // enable-matrix is needed by both the LangOpts and by LLVM.
5765     CmdArgs.push_back("-fenable-matrix");
5766     CmdArgs.push_back("-mllvm");
5767     CmdArgs.push_back("-enable-matrix");
5768   }
5769 
5770   CodeGenOptions::FramePointerKind FPKeepKind =
5771                   getFramePointerKind(Args, RawTriple);
5772   const char *FPKeepKindStr = nullptr;
5773   switch (FPKeepKind) {
5774   case CodeGenOptions::FramePointerKind::None:
5775     FPKeepKindStr = "-mframe-pointer=none";
5776     break;
5777   case CodeGenOptions::FramePointerKind::Reserved:
5778     FPKeepKindStr = "-mframe-pointer=reserved";
5779     break;
5780   case CodeGenOptions::FramePointerKind::NonLeaf:
5781     FPKeepKindStr = "-mframe-pointer=non-leaf";
5782     break;
5783   case CodeGenOptions::FramePointerKind::All:
5784     FPKeepKindStr = "-mframe-pointer=all";
5785     break;
5786   }
5787   assert(FPKeepKindStr && "unknown FramePointerKind");
5788   CmdArgs.push_back(FPKeepKindStr);
5789 
5790   Args.addOptOutFlag(CmdArgs, options::OPT_fzero_initialized_in_bss,
5791                      options::OPT_fno_zero_initialized_in_bss);
5792 
5793   bool OFastEnabled = isOptimizationLevelFast(Args);
5794   if (OFastEnabled)
5795     D.Diag(diag::warn_drv_deprecated_arg_ofast);
5796   // If -Ofast is the optimization level, then -fstrict-aliasing should be
5797   // enabled.  This alias option is being used to simplify the hasFlag logic.
5798   OptSpecifier StrictAliasingAliasOption =
5799       OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing;
5800   // We turn strict aliasing off by default if we're Windows MSVC since MSVC
5801   // doesn't do any TBAA.
5802   if (!Args.hasFlag(options::OPT_fstrict_aliasing, StrictAliasingAliasOption,
5803                     options::OPT_fno_strict_aliasing, !IsWindowsMSVC))
5804     CmdArgs.push_back("-relaxed-aliasing");
5805   if (Args.hasFlag(options::OPT_fpointer_tbaa, options::OPT_fno_pointer_tbaa,
5806                    false))
5807     CmdArgs.push_back("-pointer-tbaa");
5808   if (!Args.hasFlag(options::OPT_fstruct_path_tbaa,
5809                     options::OPT_fno_struct_path_tbaa, true))
5810     CmdArgs.push_back("-no-struct-path-tbaa");
5811   Args.addOptInFlag(CmdArgs, options::OPT_fstrict_enums,
5812                     options::OPT_fno_strict_enums);
5813   Args.addOptOutFlag(CmdArgs, options::OPT_fstrict_return,
5814                      options::OPT_fno_strict_return);
5815   Args.addOptInFlag(CmdArgs, options::OPT_fallow_editor_placeholders,
5816                     options::OPT_fno_allow_editor_placeholders);
5817   Args.addOptInFlag(CmdArgs, options::OPT_fstrict_vtable_pointers,
5818                     options::OPT_fno_strict_vtable_pointers);
5819   Args.addOptInFlag(CmdArgs, options::OPT_fforce_emit_vtables,
5820                     options::OPT_fno_force_emit_vtables);
5821   Args.addOptOutFlag(CmdArgs, options::OPT_foptimize_sibling_calls,
5822                      options::OPT_fno_optimize_sibling_calls);
5823   Args.addOptOutFlag(CmdArgs, options::OPT_fescaping_block_tail_calls,
5824                      options::OPT_fno_escaping_block_tail_calls);
5825 
5826   Args.AddLastArg(CmdArgs, options::OPT_ffine_grained_bitfield_accesses,
5827                   options::OPT_fno_fine_grained_bitfield_accesses);
5828 
5829   Args.AddLastArg(CmdArgs, options::OPT_fexperimental_relative_cxx_abi_vtables,
5830                   options::OPT_fno_experimental_relative_cxx_abi_vtables);
5831 
5832   Args.AddLastArg(CmdArgs, options::OPT_fexperimental_omit_vtable_rtti,
5833                   options::OPT_fno_experimental_omit_vtable_rtti);
5834 
5835   Args.AddLastArg(CmdArgs, options::OPT_fdisable_block_signature_string,
5836                   options::OPT_fno_disable_block_signature_string);
5837 
5838   // Handle segmented stacks.
5839   Args.addOptInFlag(CmdArgs, options::OPT_fsplit_stack,
5840                     options::OPT_fno_split_stack);
5841 
5842   // -fprotect-parens=0 is default.
5843   if (Args.hasFlag(options::OPT_fprotect_parens,
5844                    options::OPT_fno_protect_parens, false))
5845     CmdArgs.push_back("-fprotect-parens");
5846 
5847   RenderFloatingPointOptions(TC, D, OFastEnabled, Args, CmdArgs, JA);
5848 
5849   if (Arg *A = Args.getLastArg(options::OPT_fextend_args_EQ)) {
5850     const llvm::Triple::ArchType Arch = TC.getArch();
5851     if (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64) {
5852       StringRef V = A->getValue();
5853       if (V == "64")
5854         CmdArgs.push_back("-fextend-arguments=64");
5855       else if (V != "32")
5856         D.Diag(diag::err_drv_invalid_argument_to_option)
5857             << A->getValue() << A->getOption().getName();
5858     } else
5859       D.Diag(diag::err_drv_unsupported_opt_for_target)
5860           << A->getOption().getName() << TripleStr;
5861   }
5862 
5863   if (Arg *A = Args.getLastArg(options::OPT_mdouble_EQ)) {
5864     if (TC.getArch() == llvm::Triple::avr)
5865       A->render(Args, CmdArgs);
5866     else
5867       D.Diag(diag::err_drv_unsupported_opt_for_target)
5868           << A->getAsString(Args) << TripleStr;
5869   }
5870 
5871   if (Arg *A = Args.getLastArg(options::OPT_LongDouble_Group)) {
5872     if (TC.getTriple().isX86())
5873       A->render(Args, CmdArgs);
5874     else if (TC.getTriple().isPPC() &&
5875              (A->getOption().getID() != options::OPT_mlong_double_80))
5876       A->render(Args, CmdArgs);
5877     else
5878       D.Diag(diag::err_drv_unsupported_opt_for_target)
5879           << A->getAsString(Args) << TripleStr;
5880   }
5881 
5882   // Decide whether to use verbose asm. Verbose assembly is the default on
5883   // toolchains which have the integrated assembler on by default.
5884   bool IsIntegratedAssemblerDefault = TC.IsIntegratedAssemblerDefault();
5885   if (!Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm,
5886                     IsIntegratedAssemblerDefault))
5887     CmdArgs.push_back("-fno-verbose-asm");
5888 
5889   // Parse 'none' or '$major.$minor'. Disallow -fbinutils-version=0 because we
5890   // use that to indicate the MC default in the backend.
5891   if (Arg *A = Args.getLastArg(options::OPT_fbinutils_version_EQ)) {
5892     StringRef V = A->getValue();
5893     unsigned Num;
5894     if (V == "none")
5895       A->render(Args, CmdArgs);
5896     else if (!V.consumeInteger(10, Num) && Num > 0 &&
5897              (V.empty() || (V.consume_front(".") &&
5898                             !V.consumeInteger(10, Num) && V.empty())))
5899       A->render(Args, CmdArgs);
5900     else
5901       D.Diag(diag::err_drv_invalid_argument_to_option)
5902           << A->getValue() << A->getOption().getName();
5903   }
5904 
5905   // If toolchain choose to use MCAsmParser for inline asm don't pass the
5906   // option to disable integrated-as explicitly.
5907   if (!TC.useIntegratedAs() && !TC.parseInlineAsmUsingAsmParser())
5908     CmdArgs.push_back("-no-integrated-as");
5909 
5910   if (Args.hasArg(options::OPT_fdebug_pass_structure)) {
5911     CmdArgs.push_back("-mdebug-pass");
5912     CmdArgs.push_back("Structure");
5913   }
5914   if (Args.hasArg(options::OPT_fdebug_pass_arguments)) {
5915     CmdArgs.push_back("-mdebug-pass");
5916     CmdArgs.push_back("Arguments");
5917   }
5918 
5919   // Enable -mconstructor-aliases except on darwin, where we have to work around
5920   // a linker bug (see https://openradar.appspot.com/7198997), and CUDA device
5921   // code, where aliases aren't supported.
5922   if (!RawTriple.isOSDarwin() && !RawTriple.isNVPTX())
5923     CmdArgs.push_back("-mconstructor-aliases");
5924 
5925   // Darwin's kernel doesn't support guard variables; just die if we
5926   // try to use them.
5927   if (KernelOrKext && RawTriple.isOSDarwin())
5928     CmdArgs.push_back("-fforbid-guard-variables");
5929 
5930   if (Args.hasFlag(options::OPT_mms_bitfields, options::OPT_mno_ms_bitfields,
5931                    Triple.isWindowsGNUEnvironment())) {
5932     CmdArgs.push_back("-mms-bitfields");
5933   }
5934 
5935   if (Triple.isWindowsGNUEnvironment()) {
5936     Args.addOptOutFlag(CmdArgs, options::OPT_fauto_import,
5937                        options::OPT_fno_auto_import);
5938   }
5939 
5940   if (Args.hasFlag(options::OPT_fms_volatile, options::OPT_fno_ms_volatile,
5941                    Triple.isX86() && D.IsCLMode()))
5942     CmdArgs.push_back("-fms-volatile");
5943 
5944   // Non-PIC code defaults to -fdirect-access-external-data while PIC code
5945   // defaults to -fno-direct-access-external-data. Pass the option if different
5946   // from the default.
5947   if (Arg *A = Args.getLastArg(options::OPT_fdirect_access_external_data,
5948                                options::OPT_fno_direct_access_external_data)) {
5949     if (A->getOption().matches(options::OPT_fdirect_access_external_data) !=
5950         (PICLevel == 0))
5951       A->render(Args, CmdArgs);
5952   } else if (PICLevel == 0 && Triple.isLoongArch()) {
5953     // Some targets default to -fno-direct-access-external-data even for
5954     // -fno-pic.
5955     CmdArgs.push_back("-fno-direct-access-external-data");
5956   }
5957 
5958   if (Args.hasFlag(options::OPT_fno_plt, options::OPT_fplt, false)) {
5959     CmdArgs.push_back("-fno-plt");
5960   }
5961 
5962   // -fhosted is default.
5963   // TODO: Audit uses of KernelOrKext and see where it'd be more appropriate to
5964   // use Freestanding.
5965   bool Freestanding =
5966       Args.hasFlag(options::OPT_ffreestanding, options::OPT_fhosted, false) ||
5967       KernelOrKext;
5968   if (Freestanding)
5969     CmdArgs.push_back("-ffreestanding");
5970 
5971   Args.AddLastArg(CmdArgs, options::OPT_fno_knr_functions);
5972 
5973   // This is a coarse approximation of what llvm-gcc actually does, both
5974   // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more
5975   // complicated ways.
5976   auto SanitizeArgs = TC.getSanitizerArgs(Args);
5977 
5978   bool IsAsyncUnwindTablesDefault =
5979       TC.getDefaultUnwindTableLevel(Args) == ToolChain::UnwindTableLevel::Asynchronous;
5980   bool IsSyncUnwindTablesDefault =
5981       TC.getDefaultUnwindTableLevel(Args) == ToolChain::UnwindTableLevel::Synchronous;
5982 
5983   bool AsyncUnwindTables = Args.hasFlag(
5984       options::OPT_fasynchronous_unwind_tables,
5985       options::OPT_fno_asynchronous_unwind_tables,
5986       (IsAsyncUnwindTablesDefault || SanitizeArgs.needsUnwindTables()) &&
5987           !Freestanding);
5988   bool UnwindTables =
5989       Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables,
5990                    IsSyncUnwindTablesDefault && !Freestanding);
5991   if (AsyncUnwindTables)
5992     CmdArgs.push_back("-funwind-tables=2");
5993   else if (UnwindTables)
5994      CmdArgs.push_back("-funwind-tables=1");
5995 
5996   // Prepare `-aux-target-cpu` and `-aux-target-feature` unless
5997   // `--gpu-use-aux-triple-only` is specified.
5998   if (!Args.getLastArg(options::OPT_gpu_use_aux_triple_only) &&
5999       (IsCudaDevice || IsHIPDevice)) {
6000     const ArgList &HostArgs =
6001         C.getArgsForToolChain(nullptr, StringRef(), Action::OFK_None);
6002     std::string HostCPU =
6003         getCPUName(D, HostArgs, *TC.getAuxTriple(), /*FromAs*/ false);
6004     if (!HostCPU.empty()) {
6005       CmdArgs.push_back("-aux-target-cpu");
6006       CmdArgs.push_back(Args.MakeArgString(HostCPU));
6007     }
6008     getTargetFeatures(D, *TC.getAuxTriple(), HostArgs, CmdArgs,
6009                       /*ForAS*/ false, /*IsAux*/ true);
6010   }
6011 
6012   TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind());
6013 
6014   addMCModel(D, Args, Triple, RelocationModel, CmdArgs);
6015 
6016   if (Arg *A = Args.getLastArg(options::OPT_mtls_size_EQ)) {
6017     StringRef Value = A->getValue();
6018     unsigned TLSSize = 0;
6019     Value.getAsInteger(10, TLSSize);
6020     if (!Triple.isAArch64() || !Triple.isOSBinFormatELF())
6021       D.Diag(diag::err_drv_unsupported_opt_for_target)
6022           << A->getOption().getName() << TripleStr;
6023     if (TLSSize != 12 && TLSSize != 24 && TLSSize != 32 && TLSSize != 48)
6024       D.Diag(diag::err_drv_invalid_int_value)
6025           << A->getOption().getName() << Value;
6026     Args.AddLastArg(CmdArgs, options::OPT_mtls_size_EQ);
6027   }
6028 
6029   if (isTLSDESCEnabled(TC, Args))
6030     CmdArgs.push_back("-enable-tlsdesc");
6031 
6032   // Add the target cpu
6033   std::string CPU = getCPUName(D, Args, Triple, /*FromAs*/ false);
6034   if (!CPU.empty()) {
6035     CmdArgs.push_back("-target-cpu");
6036     CmdArgs.push_back(Args.MakeArgString(CPU));
6037   }
6038 
6039   RenderTargetOptions(Triple, Args, KernelOrKext, CmdArgs);
6040 
6041   // Add clang-cl arguments.
6042   types::ID InputType = Input.getType();
6043   if (D.IsCLMode())
6044     AddClangCLArgs(Args, InputType, CmdArgs);
6045 
6046   llvm::codegenoptions::DebugInfoKind DebugInfoKind =
6047       llvm::codegenoptions::NoDebugInfo;
6048   DwarfFissionKind DwarfFission = DwarfFissionKind::None;
6049   renderDebugOptions(TC, D, RawTriple, Args, types::isLLVMIR(InputType),
6050                      CmdArgs, Output, DebugInfoKind, DwarfFission);
6051 
6052   // Add the split debug info name to the command lines here so we
6053   // can propagate it to the backend.
6054   bool SplitDWARF = (DwarfFission != DwarfFissionKind::None) &&
6055                     (TC.getTriple().isOSBinFormatELF() ||
6056                      TC.getTriple().isOSBinFormatWasm() ||
6057                      TC.getTriple().isOSBinFormatCOFF()) &&
6058                     (isa<AssembleJobAction>(JA) || isa<CompileJobAction>(JA) ||
6059                      isa<BackendJobAction>(JA));
6060   if (SplitDWARF) {
6061     const char *SplitDWARFOut = SplitDebugName(JA, Args, Input, Output);
6062     CmdArgs.push_back("-split-dwarf-file");
6063     CmdArgs.push_back(SplitDWARFOut);
6064     if (DwarfFission == DwarfFissionKind::Split) {
6065       CmdArgs.push_back("-split-dwarf-output");
6066       CmdArgs.push_back(SplitDWARFOut);
6067     }
6068   }
6069 
6070   // Pass the linker version in use.
6071   if (Arg *A = Args.getLastArg(options::OPT_mlinker_version_EQ)) {
6072     CmdArgs.push_back("-target-linker-version");
6073     CmdArgs.push_back(A->getValue());
6074   }
6075 
6076   // Explicitly error on some things we know we don't support and can't just
6077   // ignore.
6078   if (!Args.hasArg(options::OPT_fallow_unsupported)) {
6079     Arg *Unsupported;
6080     if (types::isCXX(InputType) && RawTriple.isOSDarwin() &&
6081         TC.getArch() == llvm::Triple::x86) {
6082       if ((Unsupported = Args.getLastArg(options::OPT_fapple_kext)) ||
6083           (Unsupported = Args.getLastArg(options::OPT_mkernel)))
6084         D.Diag(diag::err_drv_clang_unsupported_opt_cxx_darwin_i386)
6085             << Unsupported->getOption().getName();
6086     }
6087     // The faltivec option has been superseded by the maltivec option.
6088     if ((Unsupported = Args.getLastArg(options::OPT_faltivec)))
6089       D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
6090           << Unsupported->getOption().getName()
6091           << "please use -maltivec and include altivec.h explicitly";
6092     if ((Unsupported = Args.getLastArg(options::OPT_fno_altivec)))
6093       D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
6094           << Unsupported->getOption().getName() << "please use -mno-altivec";
6095   }
6096 
6097   Args.AddAllArgs(CmdArgs, options::OPT_v);
6098 
6099   if (Args.getLastArg(options::OPT_H)) {
6100     CmdArgs.push_back("-H");
6101     CmdArgs.push_back("-sys-header-deps");
6102   }
6103   Args.AddAllArgs(CmdArgs, options::OPT_fshow_skipped_includes);
6104 
6105   if (D.CCPrintHeadersFormat && !D.CCGenDiagnostics) {
6106     CmdArgs.push_back("-header-include-file");
6107     CmdArgs.push_back(!D.CCPrintHeadersFilename.empty()
6108                           ? D.CCPrintHeadersFilename.c_str()
6109                           : "-");
6110     CmdArgs.push_back("-sys-header-deps");
6111     CmdArgs.push_back(Args.MakeArgString(
6112         "-header-include-format=" +
6113         std::string(headerIncludeFormatKindToString(D.CCPrintHeadersFormat))));
6114     CmdArgs.push_back(
6115         Args.MakeArgString("-header-include-filtering=" +
6116                            std::string(headerIncludeFilteringKindToString(
6117                                D.CCPrintHeadersFiltering))));
6118   }
6119   Args.AddLastArg(CmdArgs, options::OPT_P);
6120   Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout);
6121 
6122   if (D.CCLogDiagnostics && !D.CCGenDiagnostics) {
6123     CmdArgs.push_back("-diagnostic-log-file");
6124     CmdArgs.push_back(!D.CCLogDiagnosticsFilename.empty()
6125                           ? D.CCLogDiagnosticsFilename.c_str()
6126                           : "-");
6127   }
6128 
6129   // Give the gen diagnostics more chances to succeed, by avoiding intentional
6130   // crashes.
6131   if (D.CCGenDiagnostics)
6132     CmdArgs.push_back("-disable-pragma-debug-crash");
6133 
6134   // Allow backend to put its diagnostic files in the same place as frontend
6135   // crash diagnostics files.
6136   if (Args.hasArg(options::OPT_fcrash_diagnostics_dir)) {
6137     StringRef Dir = Args.getLastArgValue(options::OPT_fcrash_diagnostics_dir);
6138     CmdArgs.push_back("-mllvm");
6139     CmdArgs.push_back(Args.MakeArgString("-crash-diagnostics-dir=" + Dir));
6140   }
6141 
6142   bool UseSeparateSections = isUseSeparateSections(Triple);
6143 
6144   if (Args.hasFlag(options::OPT_ffunction_sections,
6145                    options::OPT_fno_function_sections, UseSeparateSections)) {
6146     CmdArgs.push_back("-ffunction-sections");
6147   }
6148 
6149   if (Arg *A = Args.getLastArg(options::OPT_fbasic_block_address_map,
6150                                options::OPT_fno_basic_block_address_map)) {
6151     if ((Triple.isX86() || Triple.isAArch64()) && Triple.isOSBinFormatELF()) {
6152       if (A->getOption().matches(options::OPT_fbasic_block_address_map))
6153         A->render(Args, CmdArgs);
6154     } else {
6155       D.Diag(diag::err_drv_unsupported_opt_for_target)
6156           << A->getAsString(Args) << TripleStr;
6157     }
6158   }
6159 
6160   if (Arg *A = Args.getLastArg(options::OPT_fbasic_block_sections_EQ)) {
6161     StringRef Val = A->getValue();
6162     if (Triple.isX86() && Triple.isOSBinFormatELF()) {
6163       if (Val != "all" && Val != "labels" && Val != "none" &&
6164           !Val.starts_with("list="))
6165         D.Diag(diag::err_drv_invalid_value)
6166             << A->getAsString(Args) << A->getValue();
6167       else
6168         A->render(Args, CmdArgs);
6169     } else if (Triple.isAArch64() && Triple.isOSBinFormatELF()) {
6170       // "all" is not supported on AArch64 since branch relaxation creates new
6171       // basic blocks for some cross-section branches.
6172       if (Val != "labels" && Val != "none" && !Val.starts_with("list="))
6173         D.Diag(diag::err_drv_invalid_value)
6174             << A->getAsString(Args) << A->getValue();
6175       else
6176         A->render(Args, CmdArgs);
6177     } else if (Triple.isNVPTX()) {
6178       // Do not pass the option to the GPU compilation. We still want it enabled
6179       // for the host-side compilation, so seeing it here is not an error.
6180     } else if (Val != "none") {
6181       // =none is allowed everywhere. It's useful for overriding the option
6182       // and is the same as not specifying the option.
6183       D.Diag(diag::err_drv_unsupported_opt_for_target)
6184           << A->getAsString(Args) << TripleStr;
6185     }
6186   }
6187 
6188   bool HasDefaultDataSections = Triple.isOSBinFormatXCOFF();
6189   if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
6190                    UseSeparateSections || HasDefaultDataSections)) {
6191     CmdArgs.push_back("-fdata-sections");
6192   }
6193 
6194   Args.addOptOutFlag(CmdArgs, options::OPT_funique_section_names,
6195                      options::OPT_fno_unique_section_names);
6196   Args.addOptInFlag(CmdArgs, options::OPT_fseparate_named_sections,
6197                     options::OPT_fno_separate_named_sections);
6198   Args.addOptInFlag(CmdArgs, options::OPT_funique_internal_linkage_names,
6199                     options::OPT_fno_unique_internal_linkage_names);
6200   Args.addOptInFlag(CmdArgs, options::OPT_funique_basic_block_section_names,
6201                     options::OPT_fno_unique_basic_block_section_names);
6202   Args.addOptInFlag(CmdArgs, options::OPT_fconvergent_functions,
6203                     options::OPT_fno_convergent_functions);
6204 
6205   if (Arg *A = Args.getLastArg(options::OPT_fsplit_machine_functions,
6206                                options::OPT_fno_split_machine_functions)) {
6207     if (!A->getOption().matches(options::OPT_fno_split_machine_functions)) {
6208       // This codegen pass is only available on x86 and AArch64 ELF targets.
6209       if ((Triple.isX86() || Triple.isAArch64()) && Triple.isOSBinFormatELF())
6210         A->render(Args, CmdArgs);
6211       else
6212         D.Diag(diag::err_drv_unsupported_opt_for_target)
6213             << A->getAsString(Args) << TripleStr;
6214     }
6215   }
6216 
6217   Args.AddLastArg(CmdArgs, options::OPT_finstrument_functions,
6218                   options::OPT_finstrument_functions_after_inlining,
6219                   options::OPT_finstrument_function_entry_bare);
6220 
6221   // NVPTX/AMDGCN doesn't support PGO or coverage. There's no runtime support
6222   // for sampling, overhead of call arc collection is way too high and there's
6223   // no way to collect the output.
6224   if (!Triple.isNVPTX() && !Triple.isAMDGCN())
6225     addPGOAndCoverageFlags(TC, C, JA, Output, Args, SanitizeArgs, CmdArgs);
6226 
6227   Args.AddLastArg(CmdArgs, options::OPT_fclang_abi_compat_EQ);
6228 
6229   if (getLastProfileSampleUseArg(Args) &&
6230       Args.hasArg(options::OPT_fsample_profile_use_profi)) {
6231     CmdArgs.push_back("-mllvm");
6232     CmdArgs.push_back("-sample-profile-use-profi");
6233   }
6234 
6235   // Add runtime flag for PS4/PS5 when PGO, coverage, or sanitizers are enabled.
6236   if (RawTriple.isPS() &&
6237       !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
6238     PScpu::addProfileRTArgs(TC, Args, CmdArgs);
6239     PScpu::addSanitizerArgs(TC, Args, CmdArgs);
6240   }
6241 
6242   // Pass options for controlling the default header search paths.
6243   if (Args.hasArg(options::OPT_nostdinc)) {
6244     CmdArgs.push_back("-nostdsysteminc");
6245     CmdArgs.push_back("-nobuiltininc");
6246   } else {
6247     if (Args.hasArg(options::OPT_nostdlibinc))
6248       CmdArgs.push_back("-nostdsysteminc");
6249     Args.AddLastArg(CmdArgs, options::OPT_nostdincxx);
6250     Args.AddLastArg(CmdArgs, options::OPT_nobuiltininc);
6251   }
6252 
6253   // Pass the path to compiler resource files.
6254   CmdArgs.push_back("-resource-dir");
6255   CmdArgs.push_back(D.ResourceDir.c_str());
6256 
6257   Args.AddLastArg(CmdArgs, options::OPT_working_directory);
6258 
6259   RenderARCMigrateToolOptions(D, Args, CmdArgs);
6260 
6261   // Add preprocessing options like -I, -D, etc. if we are using the
6262   // preprocessor.
6263   //
6264   // FIXME: Support -fpreprocessed
6265   if (types::getPreprocessedType(InputType) != types::TY_INVALID)
6266     AddPreprocessingOptions(C, JA, D, Args, CmdArgs, Output, Inputs);
6267 
6268   // Don't warn about "clang -c -DPIC -fPIC test.i" because libtool.m4 assumes
6269   // that "The compiler can only warn and ignore the option if not recognized".
6270   // When building with ccache, it will pass -D options to clang even on
6271   // preprocessed inputs and configure concludes that -fPIC is not supported.
6272   Args.ClaimAllArgs(options::OPT_D);
6273 
6274   // Manually translate -O4 to -O3; let clang reject others.
6275   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
6276     if (A->getOption().matches(options::OPT_O4)) {
6277       CmdArgs.push_back("-O3");
6278       D.Diag(diag::warn_O4_is_O3);
6279     } else {
6280       A->render(Args, CmdArgs);
6281     }
6282   }
6283 
6284   // Warn about ignored options to clang.
6285   for (const Arg *A :
6286        Args.filtered(options::OPT_clang_ignored_gcc_optimization_f_Group)) {
6287     D.Diag(diag::warn_ignored_gcc_optimization) << A->getAsString(Args);
6288     A->claim();
6289   }
6290 
6291   for (const Arg *A :
6292        Args.filtered(options::OPT_clang_ignored_legacy_options_Group)) {
6293     D.Diag(diag::warn_ignored_clang_option) << A->getAsString(Args);
6294     A->claim();
6295   }
6296 
6297   claimNoWarnArgs(Args);
6298 
6299   Args.AddAllArgs(CmdArgs, options::OPT_R_Group);
6300 
6301   for (const Arg *A :
6302        Args.filtered(options::OPT_W_Group, options::OPT__SLASH_wd)) {
6303     A->claim();
6304     if (A->getOption().getID() == options::OPT__SLASH_wd) {
6305       unsigned WarningNumber;
6306       if (StringRef(A->getValue()).getAsInteger(10, WarningNumber)) {
6307         D.Diag(diag::err_drv_invalid_int_value)
6308             << A->getAsString(Args) << A->getValue();
6309         continue;
6310       }
6311 
6312       if (auto Group = diagGroupFromCLWarningID(WarningNumber)) {
6313         CmdArgs.push_back(Args.MakeArgString(
6314             "-Wno-" + DiagnosticIDs::getWarningOptionForGroup(*Group)));
6315       }
6316       continue;
6317     }
6318     A->render(Args, CmdArgs);
6319   }
6320 
6321   Args.AddAllArgs(CmdArgs, options::OPT_Wsystem_headers_in_module_EQ);
6322 
6323   if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false))
6324     CmdArgs.push_back("-pedantic");
6325   Args.AddLastArg(CmdArgs, options::OPT_pedantic_errors);
6326   Args.AddLastArg(CmdArgs, options::OPT_w);
6327 
6328   Args.addOptInFlag(CmdArgs, options::OPT_ffixed_point,
6329                     options::OPT_fno_fixed_point);
6330 
6331   if (Arg *A = Args.getLastArg(options::OPT_fcxx_abi_EQ))
6332     A->render(Args, CmdArgs);
6333 
6334   Args.AddLastArg(CmdArgs, options::OPT_fexperimental_relative_cxx_abi_vtables,
6335                   options::OPT_fno_experimental_relative_cxx_abi_vtables);
6336 
6337   Args.AddLastArg(CmdArgs, options::OPT_fexperimental_omit_vtable_rtti,
6338                   options::OPT_fno_experimental_omit_vtable_rtti);
6339 
6340   if (Arg *A = Args.getLastArg(options::OPT_ffuchsia_api_level_EQ))
6341     A->render(Args, CmdArgs);
6342 
6343   // Handle -{std, ansi, trigraphs} -- take the last of -{std, ansi}
6344   // (-ansi is equivalent to -std=c89 or -std=c++98).
6345   //
6346   // If a std is supplied, only add -trigraphs if it follows the
6347   // option.
6348   bool ImplyVCPPCVer = false;
6349   bool ImplyVCPPCXXVer = false;
6350   const Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi);
6351   if (Std) {
6352     if (Std->getOption().matches(options::OPT_ansi))
6353       if (types::isCXX(InputType))
6354         CmdArgs.push_back("-std=c++98");
6355       else
6356         CmdArgs.push_back("-std=c89");
6357     else
6358       Std->render(Args, CmdArgs);
6359 
6360     // If -f(no-)trigraphs appears after the language standard flag, honor it.
6361     if (Arg *A = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi,
6362                                  options::OPT_ftrigraphs,
6363                                  options::OPT_fno_trigraphs))
6364       if (A != Std)
6365         A->render(Args, CmdArgs);
6366   } else {
6367     // Honor -std-default.
6368     //
6369     // FIXME: Clang doesn't correctly handle -std= when the input language
6370     // doesn't match. For the time being just ignore this for C++ inputs;
6371     // eventually we want to do all the standard defaulting here instead of
6372     // splitting it between the driver and clang -cc1.
6373     if (!types::isCXX(InputType)) {
6374       if (!Args.hasArg(options::OPT__SLASH_std)) {
6375         Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ, "-std=",
6376                                   /*Joined=*/true);
6377       } else
6378         ImplyVCPPCVer = true;
6379     }
6380     else if (IsWindowsMSVC)
6381       ImplyVCPPCXXVer = true;
6382 
6383     Args.AddLastArg(CmdArgs, options::OPT_ftrigraphs,
6384                     options::OPT_fno_trigraphs);
6385   }
6386 
6387   // GCC's behavior for -Wwrite-strings is a bit strange:
6388   //  * In C, this "warning flag" changes the types of string literals from
6389   //    'char[N]' to 'const char[N]', and thus triggers an unrelated warning
6390   //    for the discarded qualifier.
6391   //  * In C++, this is just a normal warning flag.
6392   //
6393   // Implementing this warning correctly in C is hard, so we follow GCC's
6394   // behavior for now. FIXME: Directly diagnose uses of a string literal as
6395   // a non-const char* in C, rather than using this crude hack.
6396   if (!types::isCXX(InputType)) {
6397     // FIXME: This should behave just like a warning flag, and thus should also
6398     // respect -Weverything, -Wno-everything, -Werror=write-strings, and so on.
6399     Arg *WriteStrings =
6400         Args.getLastArg(options::OPT_Wwrite_strings,
6401                         options::OPT_Wno_write_strings, options::OPT_w);
6402     if (WriteStrings &&
6403         WriteStrings->getOption().matches(options::OPT_Wwrite_strings))
6404       CmdArgs.push_back("-fconst-strings");
6405   }
6406 
6407   // GCC provides a macro definition '__DEPRECATED' when -Wdeprecated is active
6408   // during C++ compilation, which it is by default. GCC keeps this define even
6409   // in the presence of '-w', match this behavior bug-for-bug.
6410   if (types::isCXX(InputType) &&
6411       Args.hasFlag(options::OPT_Wdeprecated, options::OPT_Wno_deprecated,
6412                    true)) {
6413     CmdArgs.push_back("-fdeprecated-macro");
6414   }
6415 
6416   // Translate GCC's misnamer '-fasm' arguments to '-fgnu-keywords'.
6417   if (Arg *Asm = Args.getLastArg(options::OPT_fasm, options::OPT_fno_asm)) {
6418     if (Asm->getOption().matches(options::OPT_fasm))
6419       CmdArgs.push_back("-fgnu-keywords");
6420     else
6421       CmdArgs.push_back("-fno-gnu-keywords");
6422   }
6423 
6424   if (!ShouldEnableAutolink(Args, TC, JA))
6425     CmdArgs.push_back("-fno-autolink");
6426 
6427   Args.AddLastArg(CmdArgs, options::OPT_ftemplate_depth_EQ);
6428   Args.AddLastArg(CmdArgs, options::OPT_foperator_arrow_depth_EQ);
6429   Args.AddLastArg(CmdArgs, options::OPT_fconstexpr_depth_EQ);
6430   Args.AddLastArg(CmdArgs, options::OPT_fconstexpr_steps_EQ);
6431 
6432   Args.AddLastArg(CmdArgs, options::OPT_fexperimental_library);
6433 
6434   if (Args.hasArg(options::OPT_fexperimental_new_constant_interpreter))
6435     CmdArgs.push_back("-fexperimental-new-constant-interpreter");
6436 
6437   if (Arg *A = Args.getLastArg(options::OPT_fbracket_depth_EQ)) {
6438     CmdArgs.push_back("-fbracket-depth");
6439     CmdArgs.push_back(A->getValue());
6440   }
6441 
6442   if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ,
6443                                options::OPT_Wlarge_by_value_copy_def)) {
6444     if (A->getNumValues()) {
6445       StringRef bytes = A->getValue();
6446       CmdArgs.push_back(Args.MakeArgString("-Wlarge-by-value-copy=" + bytes));
6447     } else
6448       CmdArgs.push_back("-Wlarge-by-value-copy=64"); // default value
6449   }
6450 
6451   if (Args.hasArg(options::OPT_relocatable_pch))
6452     CmdArgs.push_back("-relocatable-pch");
6453 
6454   if (const Arg *A = Args.getLastArg(options::OPT_fcf_runtime_abi_EQ)) {
6455     static const char *kCFABIs[] = {
6456       "standalone", "objc", "swift", "swift-5.0", "swift-4.2", "swift-4.1",
6457     };
6458 
6459     if (!llvm::is_contained(kCFABIs, StringRef(A->getValue())))
6460       D.Diag(diag::err_drv_invalid_cf_runtime_abi) << A->getValue();
6461     else
6462       A->render(Args, CmdArgs);
6463   }
6464 
6465   if (Arg *A = Args.getLastArg(options::OPT_fconstant_string_class_EQ)) {
6466     CmdArgs.push_back("-fconstant-string-class");
6467     CmdArgs.push_back(A->getValue());
6468   }
6469 
6470   if (Arg *A = Args.getLastArg(options::OPT_ftabstop_EQ)) {
6471     CmdArgs.push_back("-ftabstop");
6472     CmdArgs.push_back(A->getValue());
6473   }
6474 
6475   Args.addOptInFlag(CmdArgs, options::OPT_fstack_size_section,
6476                     options::OPT_fno_stack_size_section);
6477 
6478   if (Args.hasArg(options::OPT_fstack_usage)) {
6479     CmdArgs.push_back("-stack-usage-file");
6480 
6481     if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) {
6482       SmallString<128> OutputFilename(OutputOpt->getValue());
6483       llvm::sys::path::replace_extension(OutputFilename, "su");
6484       CmdArgs.push_back(Args.MakeArgString(OutputFilename));
6485     } else
6486       CmdArgs.push_back(
6487           Args.MakeArgString(Twine(getBaseInputStem(Args, Inputs)) + ".su"));
6488   }
6489 
6490   CmdArgs.push_back("-ferror-limit");
6491   if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ))
6492     CmdArgs.push_back(A->getValue());
6493   else
6494     CmdArgs.push_back("19");
6495 
6496   Args.AddLastArg(CmdArgs, options::OPT_fconstexpr_backtrace_limit_EQ);
6497   Args.AddLastArg(CmdArgs, options::OPT_fmacro_backtrace_limit_EQ);
6498   Args.AddLastArg(CmdArgs, options::OPT_ftemplate_backtrace_limit_EQ);
6499   Args.AddLastArg(CmdArgs, options::OPT_fspell_checking_limit_EQ);
6500   Args.AddLastArg(CmdArgs, options::OPT_fcaret_diagnostics_max_lines_EQ);
6501 
6502   // Pass -fmessage-length=.
6503   unsigned MessageLength = 0;
6504   if (Arg *A = Args.getLastArg(options::OPT_fmessage_length_EQ)) {
6505     StringRef V(A->getValue());
6506     if (V.getAsInteger(0, MessageLength))
6507       D.Diag(diag::err_drv_invalid_argument_to_option)
6508           << V << A->getOption().getName();
6509   } else {
6510     // If -fmessage-length=N was not specified, determine whether this is a
6511     // terminal and, if so, implicitly define -fmessage-length appropriately.
6512     MessageLength = llvm::sys::Process::StandardErrColumns();
6513   }
6514   if (MessageLength != 0)
6515     CmdArgs.push_back(
6516         Args.MakeArgString("-fmessage-length=" + Twine(MessageLength)));
6517 
6518   if (Arg *A = Args.getLastArg(options::OPT_frandomize_layout_seed_EQ))
6519     CmdArgs.push_back(
6520         Args.MakeArgString("-frandomize-layout-seed=" + Twine(A->getValue(0))));
6521 
6522   if (Arg *A = Args.getLastArg(options::OPT_frandomize_layout_seed_file_EQ))
6523     CmdArgs.push_back(Args.MakeArgString("-frandomize-layout-seed-file=" +
6524                                          Twine(A->getValue(0))));
6525 
6526   // -fvisibility= and -fvisibility-ms-compat are of a piece.
6527   if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ,
6528                                      options::OPT_fvisibility_ms_compat)) {
6529     if (A->getOption().matches(options::OPT_fvisibility_EQ)) {
6530       A->render(Args, CmdArgs);
6531     } else {
6532       assert(A->getOption().matches(options::OPT_fvisibility_ms_compat));
6533       CmdArgs.push_back("-fvisibility=hidden");
6534       CmdArgs.push_back("-ftype-visibility=default");
6535     }
6536   } else if (IsOpenMPDevice) {
6537     // When compiling for the OpenMP device we want protected visibility by
6538     // default. This prevents the device from accidentally preempting code on
6539     // the host, makes the system more robust, and improves performance.
6540     CmdArgs.push_back("-fvisibility=protected");
6541   }
6542 
6543   // PS4/PS5 process these options in addClangTargetOptions.
6544   if (!RawTriple.isPS()) {
6545     if (const Arg *A =
6546             Args.getLastArg(options::OPT_fvisibility_from_dllstorageclass,
6547                             options::OPT_fno_visibility_from_dllstorageclass)) {
6548       if (A->getOption().matches(
6549               options::OPT_fvisibility_from_dllstorageclass)) {
6550         CmdArgs.push_back("-fvisibility-from-dllstorageclass");
6551         Args.AddLastArg(CmdArgs, options::OPT_fvisibility_dllexport_EQ);
6552         Args.AddLastArg(CmdArgs, options::OPT_fvisibility_nodllstorageclass_EQ);
6553         Args.AddLastArg(CmdArgs, options::OPT_fvisibility_externs_dllimport_EQ);
6554         Args.AddLastArg(CmdArgs,
6555                         options::OPT_fvisibility_externs_nodllstorageclass_EQ);
6556       }
6557     }
6558   }
6559 
6560   if (Args.hasFlag(options::OPT_fvisibility_inlines_hidden,
6561                     options::OPT_fno_visibility_inlines_hidden, false))
6562     CmdArgs.push_back("-fvisibility-inlines-hidden");
6563 
6564   Args.AddLastArg(CmdArgs, options::OPT_fvisibility_inlines_hidden_static_local_var,
6565                            options::OPT_fno_visibility_inlines_hidden_static_local_var);
6566 
6567   // -fvisibility-global-new-delete-hidden is a deprecated spelling of
6568   // -fvisibility-global-new-delete=force-hidden.
6569   if (const Arg *A =
6570           Args.getLastArg(options::OPT_fvisibility_global_new_delete_hidden)) {
6571     D.Diag(diag::warn_drv_deprecated_arg)
6572         << A->getAsString(Args) << /*hasReplacement=*/true
6573         << "-fvisibility-global-new-delete=force-hidden";
6574   }
6575 
6576   if (const Arg *A =
6577           Args.getLastArg(options::OPT_fvisibility_global_new_delete_EQ,
6578                           options::OPT_fvisibility_global_new_delete_hidden)) {
6579     if (A->getOption().matches(options::OPT_fvisibility_global_new_delete_EQ)) {
6580       A->render(Args, CmdArgs);
6581     } else {
6582       assert(A->getOption().matches(
6583           options::OPT_fvisibility_global_new_delete_hidden));
6584       CmdArgs.push_back("-fvisibility-global-new-delete=force-hidden");
6585     }
6586   }
6587 
6588   Args.AddLastArg(CmdArgs, options::OPT_ftlsmodel_EQ);
6589 
6590   if (Args.hasFlag(options::OPT_fnew_infallible,
6591                    options::OPT_fno_new_infallible, false))
6592     CmdArgs.push_back("-fnew-infallible");
6593 
6594   if (Args.hasFlag(options::OPT_fno_operator_names,
6595                    options::OPT_foperator_names, false))
6596     CmdArgs.push_back("-fno-operator-names");
6597 
6598   // Forward -f (flag) options which we can pass directly.
6599   Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
6600   Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
6601   Args.AddLastArg(CmdArgs, options::OPT_fdigraphs, options::OPT_fno_digraphs);
6602   Args.AddLastArg(CmdArgs, options::OPT_fzero_call_used_regs_EQ);
6603   Args.AddLastArg(CmdArgs, options::OPT_fraw_string_literals,
6604                   options::OPT_fno_raw_string_literals);
6605 
6606   if (Args.hasFlag(options::OPT_femulated_tls, options::OPT_fno_emulated_tls,
6607                    Triple.hasDefaultEmulatedTLS()))
6608     CmdArgs.push_back("-femulated-tls");
6609 
6610   Args.addOptInFlag(CmdArgs, options::OPT_fcheck_new,
6611                     options::OPT_fno_check_new);
6612 
6613   if (Arg *A = Args.getLastArg(options::OPT_fzero_call_used_regs_EQ)) {
6614     // FIXME: There's no reason for this to be restricted to X86. The backend
6615     // code needs to be changed to include the appropriate function calls
6616     // automatically.
6617     if (!Triple.isX86() && !Triple.isAArch64())
6618       D.Diag(diag::err_drv_unsupported_opt_for_target)
6619           << A->getAsString(Args) << TripleStr;
6620   }
6621 
6622   // AltiVec-like language extensions aren't relevant for assembling.
6623   if (!isa<PreprocessJobAction>(JA) || Output.getType() != types::TY_PP_Asm)
6624     Args.AddLastArg(CmdArgs, options::OPT_fzvector);
6625 
6626   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_show_template_tree);
6627   Args.AddLastArg(CmdArgs, options::OPT_fno_elide_type);
6628 
6629   // Forward flags for OpenMP. We don't do this if the current action is an
6630   // device offloading action other than OpenMP.
6631   if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
6632                    options::OPT_fno_openmp, false) &&
6633       (JA.isDeviceOffloading(Action::OFK_None) ||
6634        JA.isDeviceOffloading(Action::OFK_OpenMP))) {
6635     switch (D.getOpenMPRuntime(Args)) {
6636     case Driver::OMPRT_OMP:
6637     case Driver::OMPRT_IOMP5:
6638       // Clang can generate useful OpenMP code for these two runtime libraries.
6639       CmdArgs.push_back("-fopenmp");
6640 
6641       // If no option regarding the use of TLS in OpenMP codegeneration is
6642       // given, decide a default based on the target. Otherwise rely on the
6643       // options and pass the right information to the frontend.
6644       if (!Args.hasFlag(options::OPT_fopenmp_use_tls,
6645                         options::OPT_fnoopenmp_use_tls, /*Default=*/true))
6646         CmdArgs.push_back("-fnoopenmp-use-tls");
6647       Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
6648                       options::OPT_fno_openmp_simd);
6649       Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_enable_irbuilder);
6650       Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
6651       if (!Args.hasFlag(options::OPT_fopenmp_extensions,
6652                         options::OPT_fno_openmp_extensions, /*Default=*/true))
6653         CmdArgs.push_back("-fno-openmp-extensions");
6654       Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_number_of_sm_EQ);
6655       Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_cuda_blocks_per_sm_EQ);
6656       Args.AddAllArgs(CmdArgs,
6657                       options::OPT_fopenmp_cuda_teams_reduction_recs_num_EQ);
6658       if (Args.hasFlag(options::OPT_fopenmp_optimistic_collapse,
6659                        options::OPT_fno_openmp_optimistic_collapse,
6660                        /*Default=*/false))
6661         CmdArgs.push_back("-fopenmp-optimistic-collapse");
6662 
6663       // When in OpenMP offloading mode with NVPTX target, forward
6664       // cuda-mode flag
6665       if (Args.hasFlag(options::OPT_fopenmp_cuda_mode,
6666                        options::OPT_fno_openmp_cuda_mode, /*Default=*/false))
6667         CmdArgs.push_back("-fopenmp-cuda-mode");
6668 
6669       // When in OpenMP offloading mode, enable debugging on the device.
6670       Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_target_debug_EQ);
6671       if (Args.hasFlag(options::OPT_fopenmp_target_debug,
6672                        options::OPT_fno_openmp_target_debug, /*Default=*/false))
6673         CmdArgs.push_back("-fopenmp-target-debug");
6674 
6675       // When in OpenMP offloading mode, forward assumptions information about
6676       // thread and team counts in the device.
6677       if (Args.hasFlag(options::OPT_fopenmp_assume_teams_oversubscription,
6678                        options::OPT_fno_openmp_assume_teams_oversubscription,
6679                        /*Default=*/false))
6680         CmdArgs.push_back("-fopenmp-assume-teams-oversubscription");
6681       if (Args.hasFlag(options::OPT_fopenmp_assume_threads_oversubscription,
6682                        options::OPT_fno_openmp_assume_threads_oversubscription,
6683                        /*Default=*/false))
6684         CmdArgs.push_back("-fopenmp-assume-threads-oversubscription");
6685       if (Args.hasArg(options::OPT_fopenmp_assume_no_thread_state))
6686         CmdArgs.push_back("-fopenmp-assume-no-thread-state");
6687       if (Args.hasArg(options::OPT_fopenmp_assume_no_nested_parallelism))
6688         CmdArgs.push_back("-fopenmp-assume-no-nested-parallelism");
6689       if (Args.hasArg(options::OPT_fopenmp_offload_mandatory))
6690         CmdArgs.push_back("-fopenmp-offload-mandatory");
6691       if (Args.hasArg(options::OPT_fopenmp_force_usm))
6692         CmdArgs.push_back("-fopenmp-force-usm");
6693       break;
6694     default:
6695       // By default, if Clang doesn't know how to generate useful OpenMP code
6696       // for a specific runtime library, we just don't pass the '-fopenmp' flag
6697       // down to the actual compilation.
6698       // FIXME: It would be better to have a mode which *only* omits IR
6699       // generation based on the OpenMP support so that we get consistent
6700       // semantic analysis, etc.
6701       break;
6702     }
6703   } else {
6704     Args.AddLastArg(CmdArgs, options::OPT_fopenmp_simd,
6705                     options::OPT_fno_openmp_simd);
6706     Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
6707     Args.addOptOutFlag(CmdArgs, options::OPT_fopenmp_extensions,
6708                        options::OPT_fno_openmp_extensions);
6709   }
6710 
6711   // Forward the new driver to change offloading code generation.
6712   if (Args.hasFlag(options::OPT_offload_new_driver,
6713                    options::OPT_no_offload_new_driver, false))
6714     CmdArgs.push_back("--offload-new-driver");
6715 
6716   SanitizeArgs.addArgs(TC, Args, CmdArgs, InputType);
6717 
6718   const XRayArgs &XRay = TC.getXRayArgs();
6719   XRay.addArgs(TC, Args, CmdArgs, InputType);
6720 
6721   for (const auto &Filename :
6722        Args.getAllArgValues(options::OPT_fprofile_list_EQ)) {
6723     if (D.getVFS().exists(Filename))
6724       CmdArgs.push_back(Args.MakeArgString("-fprofile-list=" + Filename));
6725     else
6726       D.Diag(clang::diag::err_drv_no_such_file) << Filename;
6727   }
6728 
6729   if (Arg *A = Args.getLastArg(options::OPT_fpatchable_function_entry_EQ)) {
6730     StringRef S0 = A->getValue(), S = S0;
6731     unsigned Size, Offset = 0;
6732     if (!Triple.isAArch64() && !Triple.isLoongArch() && !Triple.isRISCV() &&
6733         !Triple.isX86() &&
6734         !(!Triple.isOSAIX() && (Triple.getArch() == llvm::Triple::ppc ||
6735                                 Triple.getArch() == llvm::Triple::ppc64)))
6736       D.Diag(diag::err_drv_unsupported_opt_for_target)
6737           << A->getAsString(Args) << TripleStr;
6738     else if (S.consumeInteger(10, Size) ||
6739              (!S.empty() && (!S.consume_front(",") ||
6740                              S.consumeInteger(10, Offset) || !S.empty())))
6741       D.Diag(diag::err_drv_invalid_argument_to_option)
6742           << S0 << A->getOption().getName();
6743     else if (Size < Offset)
6744       D.Diag(diag::err_drv_unsupported_fpatchable_function_entry_argument);
6745     else {
6746       CmdArgs.push_back(Args.MakeArgString(A->getSpelling() + Twine(Size)));
6747       CmdArgs.push_back(Args.MakeArgString(
6748           "-fpatchable-function-entry-offset=" + Twine(Offset)));
6749     }
6750   }
6751 
6752   Args.AddLastArg(CmdArgs, options::OPT_fms_hotpatch);
6753 
6754   if (TC.SupportsProfiling()) {
6755     Args.AddLastArg(CmdArgs, options::OPT_pg);
6756 
6757     llvm::Triple::ArchType Arch = TC.getArch();
6758     if (Arg *A = Args.getLastArg(options::OPT_mfentry)) {
6759       if (Arch == llvm::Triple::systemz || TC.getTriple().isX86())
6760         A->render(Args, CmdArgs);
6761       else
6762         D.Diag(diag::err_drv_unsupported_opt_for_target)
6763             << A->getAsString(Args) << TripleStr;
6764     }
6765     if (Arg *A = Args.getLastArg(options::OPT_mnop_mcount)) {
6766       if (Arch == llvm::Triple::systemz)
6767         A->render(Args, CmdArgs);
6768       else
6769         D.Diag(diag::err_drv_unsupported_opt_for_target)
6770             << A->getAsString(Args) << TripleStr;
6771     }
6772     if (Arg *A = Args.getLastArg(options::OPT_mrecord_mcount)) {
6773       if (Arch == llvm::Triple::systemz)
6774         A->render(Args, CmdArgs);
6775       else
6776         D.Diag(diag::err_drv_unsupported_opt_for_target)
6777             << A->getAsString(Args) << TripleStr;
6778     }
6779   }
6780 
6781   if (Arg *A = Args.getLastArgNoClaim(options::OPT_pg)) {
6782     if (TC.getTriple().isOSzOS()) {
6783       D.Diag(diag::err_drv_unsupported_opt_for_target)
6784           << A->getAsString(Args) << TripleStr;
6785     }
6786   }
6787   if (Arg *A = Args.getLastArgNoClaim(options::OPT_p)) {
6788     if (!(TC.getTriple().isOSAIX() || TC.getTriple().isOSOpenBSD())) {
6789       D.Diag(diag::err_drv_unsupported_opt_for_target)
6790           << A->getAsString(Args) << TripleStr;
6791     }
6792   }
6793   if (Arg *A = Args.getLastArgNoClaim(options::OPT_p, options::OPT_pg)) {
6794     if (A->getOption().matches(options::OPT_p)) {
6795       A->claim();
6796       if (TC.getTriple().isOSAIX() && !Args.hasArgNoClaim(options::OPT_pg))
6797         CmdArgs.push_back("-pg");
6798     }
6799   }
6800 
6801   // Reject AIX-specific link options on other targets.
6802   if (!TC.getTriple().isOSAIX()) {
6803     for (const Arg *A : Args.filtered(options::OPT_b, options::OPT_K,
6804                                       options::OPT_mxcoff_build_id_EQ)) {
6805       D.Diag(diag::err_drv_unsupported_opt_for_target)
6806           << A->getSpelling() << TripleStr;
6807     }
6808   }
6809 
6810   if (Args.getLastArg(options::OPT_fapple_kext) ||
6811       (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType)))
6812     CmdArgs.push_back("-fapple-kext");
6813 
6814   Args.AddLastArg(CmdArgs, options::OPT_altivec_src_compat);
6815   Args.AddLastArg(CmdArgs, options::OPT_flax_vector_conversions_EQ);
6816   Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
6817   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info);
6818   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);
6819   Args.AddLastArg(CmdArgs, options::OPT_ftime_report);
6820   Args.AddLastArg(CmdArgs, options::OPT_ftime_report_EQ);
6821   Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
6822   Args.AddLastArg(CmdArgs, options::OPT_malign_double);
6823   Args.AddLastArg(CmdArgs, options::OPT_fno_temp_file);
6824 
6825   if (const char *Name = C.getTimeTraceFile(&JA)) {
6826     CmdArgs.push_back(Args.MakeArgString("-ftime-trace=" + Twine(Name)));
6827     Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_granularity_EQ);
6828     Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_verbose);
6829   }
6830 
6831   if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) {
6832     CmdArgs.push_back("-ftrapv-handler");
6833     CmdArgs.push_back(A->getValue());
6834   }
6835 
6836   Args.AddLastArg(CmdArgs, options::OPT_ftrap_function_EQ);
6837 
6838   // -fno-strict-overflow implies -fwrapv if it isn't disabled, but
6839   // -fstrict-overflow won't turn off an explicitly enabled -fwrapv.
6840   if (Arg *A = Args.getLastArg(options::OPT_fwrapv, options::OPT_fno_wrapv)) {
6841     if (A->getOption().matches(options::OPT_fwrapv))
6842       CmdArgs.push_back("-fwrapv");
6843   } else if (Arg *A = Args.getLastArg(options::OPT_fstrict_overflow,
6844                                       options::OPT_fno_strict_overflow)) {
6845     if (A->getOption().matches(options::OPT_fno_strict_overflow))
6846       CmdArgs.push_back("-fwrapv");
6847   }
6848 
6849   Args.AddLastArg(CmdArgs, options::OPT_ffinite_loops,
6850                   options::OPT_fno_finite_loops);
6851 
6852   Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
6853   Args.AddLastArg(CmdArgs, options::OPT_funroll_loops,
6854                   options::OPT_fno_unroll_loops);
6855 
6856   Args.AddLastArg(CmdArgs, options::OPT_fstrict_flex_arrays_EQ);
6857 
6858   Args.AddLastArg(CmdArgs, options::OPT_pthread);
6859 
6860   Args.addOptInFlag(CmdArgs, options::OPT_mspeculative_load_hardening,
6861                     options::OPT_mno_speculative_load_hardening);
6862 
6863   RenderSSPOptions(D, TC, Args, CmdArgs, KernelOrKext);
6864   RenderSCPOptions(TC, Args, CmdArgs);
6865   RenderTrivialAutoVarInitOptions(D, TC, Args, CmdArgs);
6866 
6867   Args.AddLastArg(CmdArgs, options::OPT_fswift_async_fp_EQ);
6868 
6869   Args.addOptInFlag(CmdArgs, options::OPT_mstackrealign,
6870                     options::OPT_mno_stackrealign);
6871 
6872   if (Args.hasArg(options::OPT_mstack_alignment)) {
6873     StringRef alignment = Args.getLastArgValue(options::OPT_mstack_alignment);
6874     CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" + alignment));
6875   }
6876 
6877   if (Args.hasArg(options::OPT_mstack_probe_size)) {
6878     StringRef Size = Args.getLastArgValue(options::OPT_mstack_probe_size);
6879 
6880     if (!Size.empty())
6881       CmdArgs.push_back(Args.MakeArgString("-mstack-probe-size=" + Size));
6882     else
6883       CmdArgs.push_back("-mstack-probe-size=0");
6884   }
6885 
6886   Args.addOptOutFlag(CmdArgs, options::OPT_mstack_arg_probe,
6887                      options::OPT_mno_stack_arg_probe);
6888 
6889   if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it,
6890                                options::OPT_mno_restrict_it)) {
6891     if (A->getOption().matches(options::OPT_mrestrict_it)) {
6892       CmdArgs.push_back("-mllvm");
6893       CmdArgs.push_back("-arm-restrict-it");
6894     } else {
6895       CmdArgs.push_back("-mllvm");
6896       CmdArgs.push_back("-arm-default-it");
6897     }
6898   }
6899 
6900   // Forward -cl options to -cc1
6901   RenderOpenCLOptions(Args, CmdArgs, InputType);
6902 
6903   // Forward hlsl options to -cc1
6904   RenderHLSLOptions(Args, CmdArgs, InputType);
6905 
6906   // Forward OpenACC options to -cc1
6907   RenderOpenACCOptions(D, Args, CmdArgs, InputType);
6908 
6909   if (IsHIP) {
6910     if (Args.hasFlag(options::OPT_fhip_new_launch_api,
6911                      options::OPT_fno_hip_new_launch_api, true))
6912       CmdArgs.push_back("-fhip-new-launch-api");
6913     Args.addOptInFlag(CmdArgs, options::OPT_fgpu_allow_device_init,
6914                       options::OPT_fno_gpu_allow_device_init);
6915     Args.AddLastArg(CmdArgs, options::OPT_hipstdpar);
6916     Args.AddLastArg(CmdArgs, options::OPT_hipstdpar_interpose_alloc);
6917     Args.addOptInFlag(CmdArgs, options::OPT_fhip_kernel_arg_name,
6918                       options::OPT_fno_hip_kernel_arg_name);
6919   }
6920 
6921   if (IsCuda || IsHIP) {
6922     if (IsRDCMode)
6923       CmdArgs.push_back("-fgpu-rdc");
6924     Args.addOptInFlag(CmdArgs, options::OPT_fgpu_defer_diag,
6925                       options::OPT_fno_gpu_defer_diag);
6926     if (Args.hasFlag(options::OPT_fgpu_exclude_wrong_side_overloads,
6927                      options::OPT_fno_gpu_exclude_wrong_side_overloads,
6928                      false)) {
6929       CmdArgs.push_back("-fgpu-exclude-wrong-side-overloads");
6930       CmdArgs.push_back("-fgpu-defer-diag");
6931     }
6932   }
6933 
6934   // Forward -nogpulib to -cc1.
6935   if (Args.hasArg(options::OPT_nogpulib))
6936     CmdArgs.push_back("-nogpulib");
6937 
6938   if (Arg *A = Args.getLastArg(options::OPT_fcf_protection_EQ)) {
6939     CmdArgs.push_back(
6940         Args.MakeArgString(Twine("-fcf-protection=") + A->getValue()));
6941   }
6942 
6943   if (Arg *A = Args.getLastArg(options::OPT_mfunction_return_EQ))
6944     CmdArgs.push_back(
6945         Args.MakeArgString(Twine("-mfunction-return=") + A->getValue()));
6946 
6947   Args.AddLastArg(CmdArgs, options::OPT_mindirect_branch_cs_prefix);
6948 
6949   // Forward -f options with positive and negative forms; we translate these by
6950   // hand.  Do not propagate PGO options to the GPU-side compilations as the
6951   // profile info is for the host-side compilation only.
6952   if (!(IsCudaDevice || IsHIPDevice)) {
6953     if (Arg *A = getLastProfileSampleUseArg(Args)) {
6954       auto *PGOArg = Args.getLastArg(
6955           options::OPT_fprofile_generate, options::OPT_fprofile_generate_EQ,
6956           options::OPT_fcs_profile_generate,
6957           options::OPT_fcs_profile_generate_EQ, options::OPT_fprofile_use,
6958           options::OPT_fprofile_use_EQ);
6959       if (PGOArg)
6960         D.Diag(diag::err_drv_argument_not_allowed_with)
6961             << "SampleUse with PGO options";
6962 
6963       StringRef fname = A->getValue();
6964       if (!llvm::sys::fs::exists(fname))
6965         D.Diag(diag::err_drv_no_such_file) << fname;
6966       else
6967         A->render(Args, CmdArgs);
6968     }
6969     Args.AddLastArg(CmdArgs, options::OPT_fprofile_remapping_file_EQ);
6970 
6971     if (Args.hasFlag(options::OPT_fpseudo_probe_for_profiling,
6972                      options::OPT_fno_pseudo_probe_for_profiling, false)) {
6973       CmdArgs.push_back("-fpseudo-probe-for-profiling");
6974       // Enforce -funique-internal-linkage-names if it's not explicitly turned
6975       // off.
6976       if (Args.hasFlag(options::OPT_funique_internal_linkage_names,
6977                        options::OPT_fno_unique_internal_linkage_names, true))
6978         CmdArgs.push_back("-funique-internal-linkage-names");
6979     }
6980   }
6981   RenderBuiltinOptions(TC, RawTriple, Args, CmdArgs);
6982 
6983   Args.addOptOutFlag(CmdArgs, options::OPT_fassume_sane_operator_new,
6984                      options::OPT_fno_assume_sane_operator_new);
6985 
6986   if (Args.hasFlag(options::OPT_fapinotes, options::OPT_fno_apinotes, false))
6987     CmdArgs.push_back("-fapinotes");
6988   if (Args.hasFlag(options::OPT_fapinotes_modules,
6989                    options::OPT_fno_apinotes_modules, false))
6990     CmdArgs.push_back("-fapinotes-modules");
6991   Args.AddLastArg(CmdArgs, options::OPT_fapinotes_swift_version);
6992 
6993   // -fblocks=0 is default.
6994   if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks,
6995                    TC.IsBlocksDefault()) ||
6996       (Args.hasArg(options::OPT_fgnu_runtime) &&
6997        Args.hasArg(options::OPT_fobjc_nonfragile_abi) &&
6998        !Args.hasArg(options::OPT_fno_blocks))) {
6999     CmdArgs.push_back("-fblocks");
7000 
7001     if (!Args.hasArg(options::OPT_fgnu_runtime) && !TC.hasBlocksRuntime())
7002       CmdArgs.push_back("-fblocks-runtime-optional");
7003   }
7004 
7005   // -fencode-extended-block-signature=1 is default.
7006   if (TC.IsEncodeExtendedBlockSignatureDefault())
7007     CmdArgs.push_back("-fencode-extended-block-signature");
7008 
7009   if (Args.hasFlag(options::OPT_fcoro_aligned_allocation,
7010                    options::OPT_fno_coro_aligned_allocation, false) &&
7011       types::isCXX(InputType))
7012     CmdArgs.push_back("-fcoro-aligned-allocation");
7013 
7014   Args.AddLastArg(CmdArgs, options::OPT_fdouble_square_bracket_attributes,
7015                   options::OPT_fno_double_square_bracket_attributes);
7016 
7017   Args.addOptOutFlag(CmdArgs, options::OPT_faccess_control,
7018                      options::OPT_fno_access_control);
7019   Args.addOptOutFlag(CmdArgs, options::OPT_felide_constructors,
7020                      options::OPT_fno_elide_constructors);
7021 
7022   ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
7023 
7024   if (KernelOrKext || (types::isCXX(InputType) &&
7025                        (RTTIMode == ToolChain::RM_Disabled)))
7026     CmdArgs.push_back("-fno-rtti");
7027 
7028   // -fshort-enums=0 is default for all architectures except Hexagon and z/OS.
7029   if (Args.hasFlag(options::OPT_fshort_enums, options::OPT_fno_short_enums,
7030                    TC.getArch() == llvm::Triple::hexagon || Triple.isOSzOS()))
7031     CmdArgs.push_back("-fshort-enums");
7032 
7033   RenderCharacterOptions(Args, AuxTriple ? *AuxTriple : RawTriple, CmdArgs);
7034 
7035   // -fuse-cxa-atexit is default.
7036   if (!Args.hasFlag(
7037           options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
7038           !RawTriple.isOSAIX() && !RawTriple.isOSWindows() &&
7039               ((RawTriple.getVendor() != llvm::Triple::MipsTechnologies) ||
7040                RawTriple.hasEnvironment())) ||
7041       KernelOrKext)
7042     CmdArgs.push_back("-fno-use-cxa-atexit");
7043 
7044   if (Args.hasFlag(options::OPT_fregister_global_dtors_with_atexit,
7045                    options::OPT_fno_register_global_dtors_with_atexit,
7046                    RawTriple.isOSDarwin() && !KernelOrKext))
7047     CmdArgs.push_back("-fregister-global-dtors-with-atexit");
7048 
7049   Args.addOptInFlag(CmdArgs, options::OPT_fuse_line_directives,
7050                     options::OPT_fno_use_line_directives);
7051 
7052   // -fno-minimize-whitespace is default.
7053   if (Args.hasFlag(options::OPT_fminimize_whitespace,
7054                    options::OPT_fno_minimize_whitespace, false)) {
7055     types::ID InputType = Inputs[0].getType();
7056     if (!isDerivedFromC(InputType))
7057       D.Diag(diag::err_drv_opt_unsupported_input_type)
7058           << "-fminimize-whitespace" << types::getTypeName(InputType);
7059     CmdArgs.push_back("-fminimize-whitespace");
7060   }
7061 
7062   // -fno-keep-system-includes is default.
7063   if (Args.hasFlag(options::OPT_fkeep_system_includes,
7064                    options::OPT_fno_keep_system_includes, false)) {
7065     types::ID InputType = Inputs[0].getType();
7066     if (!isDerivedFromC(InputType))
7067       D.Diag(diag::err_drv_opt_unsupported_input_type)
7068           << "-fkeep-system-includes" << types::getTypeName(InputType);
7069     CmdArgs.push_back("-fkeep-system-includes");
7070   }
7071 
7072   // -fms-extensions=0 is default.
7073   if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
7074                    IsWindowsMSVC))
7075     CmdArgs.push_back("-fms-extensions");
7076 
7077   // -fms-compatibility=0 is default.
7078   bool IsMSVCCompat = Args.hasFlag(
7079       options::OPT_fms_compatibility, options::OPT_fno_ms_compatibility,
7080       (IsWindowsMSVC && Args.hasFlag(options::OPT_fms_extensions,
7081                                      options::OPT_fno_ms_extensions, true)));
7082   if (IsMSVCCompat) {
7083     CmdArgs.push_back("-fms-compatibility");
7084     if (!types::isCXX(Input.getType()) &&
7085         Args.hasArg(options::OPT_fms_define_stdc))
7086       CmdArgs.push_back("-fms-define-stdc");
7087   }
7088 
7089   if (Triple.isWindowsMSVCEnvironment() && !D.IsCLMode() &&
7090       Args.hasArg(options::OPT_fms_runtime_lib_EQ))
7091     ProcessVSRuntimeLibrary(getToolChain(), Args, CmdArgs);
7092 
7093   // Handle -fgcc-version, if present.
7094   VersionTuple GNUCVer;
7095   if (Arg *A = Args.getLastArg(options::OPT_fgnuc_version_EQ)) {
7096     // Check that the version has 1 to 3 components and the minor and patch
7097     // versions fit in two decimal digits.
7098     StringRef Val = A->getValue();
7099     Val = Val.empty() ? "0" : Val; // Treat "" as 0 or disable.
7100     bool Invalid = GNUCVer.tryParse(Val);
7101     unsigned Minor = GNUCVer.getMinor().value_or(0);
7102     unsigned Patch = GNUCVer.getSubminor().value_or(0);
7103     if (Invalid || GNUCVer.getBuild() || Minor >= 100 || Patch >= 100) {
7104       D.Diag(diag::err_drv_invalid_value)
7105           << A->getAsString(Args) << A->getValue();
7106     }
7107   } else if (!IsMSVCCompat) {
7108     // Imitate GCC 4.2.1 by default if -fms-compatibility is not in effect.
7109     GNUCVer = VersionTuple(4, 2, 1);
7110   }
7111   if (!GNUCVer.empty()) {
7112     CmdArgs.push_back(
7113         Args.MakeArgString("-fgnuc-version=" + GNUCVer.getAsString()));
7114   }
7115 
7116   VersionTuple MSVT = TC.computeMSVCVersion(&D, Args);
7117   if (!MSVT.empty())
7118     CmdArgs.push_back(
7119         Args.MakeArgString("-fms-compatibility-version=" + MSVT.getAsString()));
7120 
7121   bool IsMSVC2015Compatible = MSVT.getMajor() >= 19;
7122   if (ImplyVCPPCVer) {
7123     StringRef LanguageStandard;
7124     if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
7125       Std = StdArg;
7126       LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
7127                              .Case("c11", "-std=c11")
7128                              .Case("c17", "-std=c17")
7129                              .Default("");
7130       if (LanguageStandard.empty())
7131         D.Diag(clang::diag::warn_drv_unused_argument)
7132             << StdArg->getAsString(Args);
7133     }
7134     CmdArgs.push_back(LanguageStandard.data());
7135   }
7136   if (ImplyVCPPCXXVer) {
7137     StringRef LanguageStandard;
7138     if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
7139       Std = StdArg;
7140       LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
7141                              .Case("c++14", "-std=c++14")
7142                              .Case("c++17", "-std=c++17")
7143                              .Case("c++20", "-std=c++20")
7144                              // TODO add c++23 and c++26 when MSVC supports it.
7145                              .Case("c++latest", "-std=c++26")
7146                              .Default("");
7147       if (LanguageStandard.empty())
7148         D.Diag(clang::diag::warn_drv_unused_argument)
7149             << StdArg->getAsString(Args);
7150     }
7151 
7152     if (LanguageStandard.empty()) {
7153       if (IsMSVC2015Compatible)
7154         LanguageStandard = "-std=c++14";
7155       else
7156         LanguageStandard = "-std=c++11";
7157     }
7158 
7159     CmdArgs.push_back(LanguageStandard.data());
7160   }
7161 
7162   Args.addOptInFlag(CmdArgs, options::OPT_fborland_extensions,
7163                     options::OPT_fno_borland_extensions);
7164 
7165   // -fno-declspec is default, except for PS4/PS5.
7166   if (Args.hasFlag(options::OPT_fdeclspec, options::OPT_fno_declspec,
7167                    RawTriple.isPS()))
7168     CmdArgs.push_back("-fdeclspec");
7169   else if (Args.hasArg(options::OPT_fno_declspec))
7170     CmdArgs.push_back("-fno-declspec"); // Explicitly disabling __declspec.
7171 
7172   // -fthreadsafe-static is default, except for MSVC compatibility versions less
7173   // than 19.
7174   if (!Args.hasFlag(options::OPT_fthreadsafe_statics,
7175                     options::OPT_fno_threadsafe_statics,
7176                     !types::isOpenCL(InputType) &&
7177                         (!IsWindowsMSVC || IsMSVC2015Compatible)))
7178     CmdArgs.push_back("-fno-threadsafe-statics");
7179 
7180   // Add -fno-assumptions, if it was specified.
7181   if (!Args.hasFlag(options::OPT_fassumptions, options::OPT_fno_assumptions,
7182                     true))
7183     CmdArgs.push_back("-fno-assumptions");
7184 
7185   // -fgnu-keywords default varies depending on language; only pass if
7186   // specified.
7187   Args.AddLastArg(CmdArgs, options::OPT_fgnu_keywords,
7188                   options::OPT_fno_gnu_keywords);
7189 
7190   Args.addOptInFlag(CmdArgs, options::OPT_fgnu89_inline,
7191                     options::OPT_fno_gnu89_inline);
7192 
7193   const Arg *InlineArg = Args.getLastArg(options::OPT_finline_functions,
7194                                          options::OPT_finline_hint_functions,
7195                                          options::OPT_fno_inline_functions);
7196   if (Arg *A = Args.getLastArg(options::OPT_finline, options::OPT_fno_inline)) {
7197     if (A->getOption().matches(options::OPT_fno_inline))
7198       A->render(Args, CmdArgs);
7199   } else if (InlineArg) {
7200     InlineArg->render(Args, CmdArgs);
7201   }
7202 
7203   Args.AddLastArg(CmdArgs, options::OPT_finline_max_stacksize_EQ);
7204 
7205   // FIXME: Find a better way to determine whether we are in C++20.
7206   bool HaveCxx20 =
7207       Std &&
7208       (Std->containsValue("c++2a") || Std->containsValue("gnu++2a") ||
7209        Std->containsValue("c++20") || Std->containsValue("gnu++20") ||
7210        Std->containsValue("c++2b") || Std->containsValue("gnu++2b") ||
7211        Std->containsValue("c++23") || Std->containsValue("gnu++23") ||
7212        Std->containsValue("c++2c") || Std->containsValue("gnu++2c") ||
7213        Std->containsValue("c++26") || Std->containsValue("gnu++26") ||
7214        Std->containsValue("c++latest") || Std->containsValue("gnu++latest"));
7215   bool HaveModules =
7216       RenderModulesOptions(C, D, Args, Input, Output, HaveCxx20, CmdArgs);
7217 
7218   // -fdelayed-template-parsing is default when targeting MSVC.
7219   // Many old Windows SDK versions require this to parse.
7220   //
7221   // According to
7222   // https://learn.microsoft.com/en-us/cpp/build/reference/permissive-standards-conformance?view=msvc-170,
7223   // MSVC actually defaults to -fno-delayed-template-parsing (/Zc:twoPhase-
7224   // with MSVC CLI) if using C++20. So we match the behavior with MSVC here to
7225   // not enable -fdelayed-template-parsing by default after C++20.
7226   //
7227   // FIXME: Given -fdelayed-template-parsing is a source of bugs, we should be
7228   // able to disable this by default at some point.
7229   if (Args.hasFlag(options::OPT_fdelayed_template_parsing,
7230                    options::OPT_fno_delayed_template_parsing,
7231                    IsWindowsMSVC && !HaveCxx20)) {
7232     if (HaveCxx20)
7233       D.Diag(clang::diag::warn_drv_delayed_template_parsing_after_cxx20);
7234 
7235     CmdArgs.push_back("-fdelayed-template-parsing");
7236   }
7237 
7238   if (Args.hasFlag(options::OPT_fpch_validate_input_files_content,
7239                    options::OPT_fno_pch_validate_input_files_content, false))
7240     CmdArgs.push_back("-fvalidate-ast-input-files-content");
7241   if (Args.hasFlag(options::OPT_fpch_instantiate_templates,
7242                    options::OPT_fno_pch_instantiate_templates, false))
7243     CmdArgs.push_back("-fpch-instantiate-templates");
7244   if (Args.hasFlag(options::OPT_fpch_codegen, options::OPT_fno_pch_codegen,
7245                    false))
7246     CmdArgs.push_back("-fmodules-codegen");
7247   if (Args.hasFlag(options::OPT_fpch_debuginfo, options::OPT_fno_pch_debuginfo,
7248                    false))
7249     CmdArgs.push_back("-fmodules-debuginfo");
7250 
7251   ObjCRuntime Runtime = AddObjCRuntimeArgs(Args, Inputs, CmdArgs, rewriteKind);
7252   RenderObjCOptions(TC, D, RawTriple, Args, Runtime, rewriteKind != RK_None,
7253                     Input, CmdArgs);
7254 
7255   if (types::isObjC(Input.getType()) &&
7256       Args.hasFlag(options::OPT_fobjc_encode_cxx_class_template_spec,
7257                    options::OPT_fno_objc_encode_cxx_class_template_spec,
7258                    !Runtime.isNeXTFamily()))
7259     CmdArgs.push_back("-fobjc-encode-cxx-class-template-spec");
7260 
7261   if (Args.hasFlag(options::OPT_fapplication_extension,
7262                    options::OPT_fno_application_extension, false))
7263     CmdArgs.push_back("-fapplication-extension");
7264 
7265   // Handle GCC-style exception args.
7266   bool EH = false;
7267   if (!C.getDriver().IsCLMode())
7268     EH = addExceptionArgs(Args, InputType, TC, KernelOrKext, Runtime, CmdArgs);
7269 
7270   // Handle exception personalities
7271   Arg *A = Args.getLastArg(
7272       options::OPT_fsjlj_exceptions, options::OPT_fseh_exceptions,
7273       options::OPT_fdwarf_exceptions, options::OPT_fwasm_exceptions);
7274   if (A) {
7275     const Option &Opt = A->getOption();
7276     if (Opt.matches(options::OPT_fsjlj_exceptions))
7277       CmdArgs.push_back("-exception-model=sjlj");
7278     if (Opt.matches(options::OPT_fseh_exceptions))
7279       CmdArgs.push_back("-exception-model=seh");
7280     if (Opt.matches(options::OPT_fdwarf_exceptions))
7281       CmdArgs.push_back("-exception-model=dwarf");
7282     if (Opt.matches(options::OPT_fwasm_exceptions))
7283       CmdArgs.push_back("-exception-model=wasm");
7284   } else {
7285     switch (TC.GetExceptionModel(Args)) {
7286     default:
7287       break;
7288     case llvm::ExceptionHandling::DwarfCFI:
7289       CmdArgs.push_back("-exception-model=dwarf");
7290       break;
7291     case llvm::ExceptionHandling::SjLj:
7292       CmdArgs.push_back("-exception-model=sjlj");
7293       break;
7294     case llvm::ExceptionHandling::WinEH:
7295       CmdArgs.push_back("-exception-model=seh");
7296       break;
7297     }
7298   }
7299 
7300   // C++ "sane" operator new.
7301   Args.addOptOutFlag(CmdArgs, options::OPT_fassume_sane_operator_new,
7302                      options::OPT_fno_assume_sane_operator_new);
7303 
7304   // -fassume-unique-vtables is on by default.
7305   Args.addOptOutFlag(CmdArgs, options::OPT_fassume_unique_vtables,
7306                      options::OPT_fno_assume_unique_vtables);
7307 
7308   // -frelaxed-template-template-args is deprecated.
7309   if (Arg *A =
7310           Args.getLastArg(options::OPT_frelaxed_template_template_args,
7311                           options::OPT_fno_relaxed_template_template_args)) {
7312     if (A->getOption().matches(
7313             options::OPT_fno_relaxed_template_template_args)) {
7314       D.Diag(diag::warn_drv_deprecated_arg_no_relaxed_template_template_args);
7315       CmdArgs.push_back("-fno-relaxed-template-template-args");
7316     } else {
7317       D.Diag(diag::warn_drv_deprecated_arg)
7318           << A->getAsString(Args) << /*hasReplacement=*/false;
7319     }
7320   }
7321 
7322   // -fsized-deallocation is on by default in C++14 onwards and otherwise off
7323   // by default.
7324   Args.addLastArg(CmdArgs, options::OPT_fsized_deallocation,
7325                   options::OPT_fno_sized_deallocation);
7326 
7327   // -faligned-allocation is on by default in C++17 onwards and otherwise off
7328   // by default.
7329   if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation,
7330                                options::OPT_fno_aligned_allocation,
7331                                options::OPT_faligned_new_EQ)) {
7332     if (A->getOption().matches(options::OPT_fno_aligned_allocation))
7333       CmdArgs.push_back("-fno-aligned-allocation");
7334     else
7335       CmdArgs.push_back("-faligned-allocation");
7336   }
7337 
7338   // The default new alignment can be specified using a dedicated option or via
7339   // a GCC-compatible option that also turns on aligned allocation.
7340   if (Arg *A = Args.getLastArg(options::OPT_fnew_alignment_EQ,
7341                                options::OPT_faligned_new_EQ))
7342     CmdArgs.push_back(
7343         Args.MakeArgString(Twine("-fnew-alignment=") + A->getValue()));
7344 
7345   // -fconstant-cfstrings is default, and may be subject to argument translation
7346   // on Darwin.
7347   if (!Args.hasFlag(options::OPT_fconstant_cfstrings,
7348                     options::OPT_fno_constant_cfstrings, true) ||
7349       !Args.hasFlag(options::OPT_mconstant_cfstrings,
7350                     options::OPT_mno_constant_cfstrings, true))
7351     CmdArgs.push_back("-fno-constant-cfstrings");
7352 
7353   Args.addOptInFlag(CmdArgs, options::OPT_fpascal_strings,
7354                     options::OPT_fno_pascal_strings);
7355 
7356   // Honor -fpack-struct= and -fpack-struct, if given. Note that
7357   // -fno-pack-struct doesn't apply to -fpack-struct=.
7358   if (Arg *A = Args.getLastArg(options::OPT_fpack_struct_EQ)) {
7359     std::string PackStructStr = "-fpack-struct=";
7360     PackStructStr += A->getValue();
7361     CmdArgs.push_back(Args.MakeArgString(PackStructStr));
7362   } else if (Args.hasFlag(options::OPT_fpack_struct,
7363                           options::OPT_fno_pack_struct, false)) {
7364     CmdArgs.push_back("-fpack-struct=1");
7365   }
7366 
7367   // Handle -fmax-type-align=N and -fno-type-align
7368   bool SkipMaxTypeAlign = Args.hasArg(options::OPT_fno_max_type_align);
7369   if (Arg *A = Args.getLastArg(options::OPT_fmax_type_align_EQ)) {
7370     if (!SkipMaxTypeAlign) {
7371       std::string MaxTypeAlignStr = "-fmax-type-align=";
7372       MaxTypeAlignStr += A->getValue();
7373       CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
7374     }
7375   } else if (RawTriple.isOSDarwin()) {
7376     if (!SkipMaxTypeAlign) {
7377       std::string MaxTypeAlignStr = "-fmax-type-align=16";
7378       CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
7379     }
7380   }
7381 
7382   if (!Args.hasFlag(options::OPT_Qy, options::OPT_Qn, true))
7383     CmdArgs.push_back("-Qn");
7384 
7385   // -fno-common is the default, set -fcommon only when that flag is set.
7386   Args.addOptInFlag(CmdArgs, options::OPT_fcommon, options::OPT_fno_common);
7387 
7388   // -fsigned-bitfields is default, and clang doesn't yet support
7389   // -funsigned-bitfields.
7390   if (!Args.hasFlag(options::OPT_fsigned_bitfields,
7391                     options::OPT_funsigned_bitfields, true))
7392     D.Diag(diag::warn_drv_clang_unsupported)
7393         << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args);
7394 
7395   // -fsigned-bitfields is default, and clang doesn't support -fno-for-scope.
7396   if (!Args.hasFlag(options::OPT_ffor_scope, options::OPT_fno_for_scope, true))
7397     D.Diag(diag::err_drv_clang_unsupported)
7398         << Args.getLastArg(options::OPT_fno_for_scope)->getAsString(Args);
7399 
7400   // -finput_charset=UTF-8 is default. Reject others
7401   if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) {
7402     StringRef value = inputCharset->getValue();
7403     if (!value.equals_insensitive("utf-8"))
7404       D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args)
7405                                           << value;
7406   }
7407 
7408   // -fexec_charset=UTF-8 is default. Reject others
7409   if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
7410     StringRef value = execCharset->getValue();
7411     if (!value.equals_insensitive("utf-8"))
7412       D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args)
7413                                           << value;
7414   }
7415 
7416   RenderDiagnosticsOptions(D, Args, CmdArgs);
7417 
7418   Args.addOptInFlag(CmdArgs, options::OPT_fasm_blocks,
7419                     options::OPT_fno_asm_blocks);
7420 
7421   Args.addOptOutFlag(CmdArgs, options::OPT_fgnu_inline_asm,
7422                      options::OPT_fno_gnu_inline_asm);
7423 
7424   // Enable vectorization per default according to the optimization level
7425   // selected. For optimization levels that want vectorization we use the alias
7426   // option to simplify the hasFlag logic.
7427   bool EnableVec = shouldEnableVectorizerAtOLevel(Args, false);
7428   OptSpecifier VectorizeAliasOption =
7429       EnableVec ? options::OPT_O_Group : options::OPT_fvectorize;
7430   if (Args.hasFlag(options::OPT_fvectorize, VectorizeAliasOption,
7431                    options::OPT_fno_vectorize, EnableVec))
7432     CmdArgs.push_back("-vectorize-loops");
7433 
7434   // -fslp-vectorize is enabled based on the optimization level selected.
7435   bool EnableSLPVec = shouldEnableVectorizerAtOLevel(Args, true);
7436   OptSpecifier SLPVectAliasOption =
7437       EnableSLPVec ? options::OPT_O_Group : options::OPT_fslp_vectorize;
7438   if (Args.hasFlag(options::OPT_fslp_vectorize, SLPVectAliasOption,
7439                    options::OPT_fno_slp_vectorize, EnableSLPVec))
7440     CmdArgs.push_back("-vectorize-slp");
7441 
7442   ParseMPreferVectorWidth(D, Args, CmdArgs);
7443 
7444   Args.AddLastArg(CmdArgs, options::OPT_fshow_overloads_EQ);
7445   Args.AddLastArg(CmdArgs,
7446                   options::OPT_fsanitize_undefined_strip_path_components_EQ);
7447 
7448   // -fdollars-in-identifiers default varies depending on platform and
7449   // language; only pass if specified.
7450   if (Arg *A = Args.getLastArg(options::OPT_fdollars_in_identifiers,
7451                                options::OPT_fno_dollars_in_identifiers)) {
7452     if (A->getOption().matches(options::OPT_fdollars_in_identifiers))
7453       CmdArgs.push_back("-fdollars-in-identifiers");
7454     else
7455       CmdArgs.push_back("-fno-dollars-in-identifiers");
7456   }
7457 
7458   Args.addOptInFlag(CmdArgs, options::OPT_fapple_pragma_pack,
7459                     options::OPT_fno_apple_pragma_pack);
7460 
7461   // Remarks can be enabled with any of the `-f.*optimization-record.*` flags.
7462   if (willEmitRemarks(Args) && checkRemarksOptions(D, Args, Triple))
7463     renderRemarksOptions(Args, CmdArgs, Triple, Input, Output, JA);
7464 
7465   bool RewriteImports = Args.hasFlag(options::OPT_frewrite_imports,
7466                                      options::OPT_fno_rewrite_imports, false);
7467   if (RewriteImports)
7468     CmdArgs.push_back("-frewrite-imports");
7469 
7470   Args.addOptInFlag(CmdArgs, options::OPT_fdirectives_only,
7471                     options::OPT_fno_directives_only);
7472 
7473   // Enable rewrite includes if the user's asked for it or if we're generating
7474   // diagnostics.
7475   // TODO: Once -module-dependency-dir works with -frewrite-includes it'd be
7476   // nice to enable this when doing a crashdump for modules as well.
7477   if (Args.hasFlag(options::OPT_frewrite_includes,
7478                    options::OPT_fno_rewrite_includes, false) ||
7479       (C.isForDiagnostics() && !HaveModules))
7480     CmdArgs.push_back("-frewrite-includes");
7481 
7482   // Only allow -traditional or -traditional-cpp outside in preprocessing modes.
7483   if (Arg *A = Args.getLastArg(options::OPT_traditional,
7484                                options::OPT_traditional_cpp)) {
7485     if (isa<PreprocessJobAction>(JA))
7486       CmdArgs.push_back("-traditional-cpp");
7487     else
7488       D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
7489   }
7490 
7491   Args.AddLastArg(CmdArgs, options::OPT_dM);
7492   Args.AddLastArg(CmdArgs, options::OPT_dD);
7493   Args.AddLastArg(CmdArgs, options::OPT_dI);
7494 
7495   Args.AddLastArg(CmdArgs, options::OPT_fmax_tokens_EQ);
7496 
7497   // Handle serialized diagnostics.
7498   if (Arg *A = Args.getLastArg(options::OPT__serialize_diags)) {
7499     CmdArgs.push_back("-serialize-diagnostic-file");
7500     CmdArgs.push_back(Args.MakeArgString(A->getValue()));
7501   }
7502 
7503   if (Args.hasArg(options::OPT_fretain_comments_from_system_headers))
7504     CmdArgs.push_back("-fretain-comments-from-system-headers");
7505 
7506   // Forward -fcomment-block-commands to -cc1.
7507   Args.AddAllArgs(CmdArgs, options::OPT_fcomment_block_commands);
7508   // Forward -fparse-all-comments to -cc1.
7509   Args.AddAllArgs(CmdArgs, options::OPT_fparse_all_comments);
7510 
7511   // Turn -fplugin=name.so into -load name.so
7512   for (const Arg *A : Args.filtered(options::OPT_fplugin_EQ)) {
7513     CmdArgs.push_back("-load");
7514     CmdArgs.push_back(A->getValue());
7515     A->claim();
7516   }
7517 
7518   // Turn -fplugin-arg-pluginname-key=value into
7519   // -plugin-arg-pluginname key=value
7520   // GCC has an actual plugin_argument struct with key/value pairs that it
7521   // passes to its plugins, but we don't, so just pass it on as-is.
7522   //
7523   // The syntax for -fplugin-arg- is ambiguous if both plugin name and
7524   // argument key are allowed to contain dashes. GCC therefore only
7525   // allows dashes in the key. We do the same.
7526   for (const Arg *A : Args.filtered(options::OPT_fplugin_arg)) {
7527     auto ArgValue = StringRef(A->getValue());
7528     auto FirstDashIndex = ArgValue.find('-');
7529     StringRef PluginName = ArgValue.substr(0, FirstDashIndex);
7530     StringRef Arg = ArgValue.substr(FirstDashIndex + 1);
7531 
7532     A->claim();
7533     if (FirstDashIndex == StringRef::npos || Arg.empty()) {
7534       if (PluginName.empty()) {
7535         D.Diag(diag::warn_drv_missing_plugin_name) << A->getAsString(Args);
7536       } else {
7537         D.Diag(diag::warn_drv_missing_plugin_arg)
7538             << PluginName << A->getAsString(Args);
7539       }
7540       continue;
7541     }
7542 
7543     CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-arg-") + PluginName));
7544     CmdArgs.push_back(Args.MakeArgString(Arg));
7545   }
7546 
7547   // Forward -fpass-plugin=name.so to -cc1.
7548   for (const Arg *A : Args.filtered(options::OPT_fpass_plugin_EQ)) {
7549     CmdArgs.push_back(
7550         Args.MakeArgString(Twine("-fpass-plugin=") + A->getValue()));
7551     A->claim();
7552   }
7553 
7554   // Forward --vfsoverlay to -cc1.
7555   for (const Arg *A : Args.filtered(options::OPT_vfsoverlay)) {
7556     CmdArgs.push_back("--vfsoverlay");
7557     CmdArgs.push_back(A->getValue());
7558     A->claim();
7559   }
7560 
7561   Args.addOptInFlag(CmdArgs, options::OPT_fsafe_buffer_usage_suggestions,
7562                     options::OPT_fno_safe_buffer_usage_suggestions);
7563 
7564   Args.addOptInFlag(CmdArgs, options::OPT_fexperimental_late_parse_attributes,
7565                     options::OPT_fno_experimental_late_parse_attributes);
7566 
7567   // Setup statistics file output.
7568   SmallString<128> StatsFile = getStatsFileName(Args, Output, Input, D);
7569   if (!StatsFile.empty()) {
7570     CmdArgs.push_back(Args.MakeArgString(Twine("-stats-file=") + StatsFile));
7571     if (D.CCPrintInternalStats)
7572       CmdArgs.push_back("-stats-file-append");
7573   }
7574 
7575   // Forward -Xclang arguments to -cc1, and -mllvm arguments to the LLVM option
7576   // parser.
7577   for (auto Arg : Args.filtered(options::OPT_Xclang)) {
7578     Arg->claim();
7579     // -finclude-default-header flag is for preprocessor,
7580     // do not pass it to other cc1 commands when save-temps is enabled
7581     if (C.getDriver().isSaveTempsEnabled() &&
7582         !isa<PreprocessJobAction>(JA)) {
7583       if (StringRef(Arg->getValue()) == "-finclude-default-header")
7584         continue;
7585     }
7586     CmdArgs.push_back(Arg->getValue());
7587   }
7588   for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
7589     A->claim();
7590 
7591     // We translate this by hand to the -cc1 argument, since nightly test uses
7592     // it and developers have been trained to spell it with -mllvm. Both
7593     // spellings are now deprecated and should be removed.
7594     if (StringRef(A->getValue(0)) == "-disable-llvm-optzns") {
7595       CmdArgs.push_back("-disable-llvm-optzns");
7596     } else {
7597       A->render(Args, CmdArgs);
7598     }
7599   }
7600 
7601   // With -save-temps, we want to save the unoptimized bitcode output from the
7602   // CompileJobAction, use -disable-llvm-passes to get pristine IR generated
7603   // by the frontend.
7604   // When -fembed-bitcode is enabled, optimized bitcode is emitted because it
7605   // has slightly different breakdown between stages.
7606   // FIXME: -fembed-bitcode -save-temps will save optimized bitcode instead of
7607   // pristine IR generated by the frontend. Ideally, a new compile action should
7608   // be added so both IR can be captured.
7609   if ((C.getDriver().isSaveTempsEnabled() ||
7610        JA.isHostOffloading(Action::OFK_OpenMP)) &&
7611       !(C.getDriver().embedBitcodeInObject() && !IsUsingLTO) &&
7612       isa<CompileJobAction>(JA))
7613     CmdArgs.push_back("-disable-llvm-passes");
7614 
7615   Args.AddAllArgs(CmdArgs, options::OPT_undef);
7616 
7617   const char *Exec = D.getClangProgramPath();
7618 
7619   // Optionally embed the -cc1 level arguments into the debug info or a
7620   // section, for build analysis.
7621   // Also record command line arguments into the debug info if
7622   // -grecord-gcc-switches options is set on.
7623   // By default, -gno-record-gcc-switches is set on and no recording.
7624   auto GRecordSwitches =
7625       Args.hasFlag(options::OPT_grecord_command_line,
7626                    options::OPT_gno_record_command_line, false);
7627   auto FRecordSwitches =
7628       Args.hasFlag(options::OPT_frecord_command_line,
7629                    options::OPT_fno_record_command_line, false);
7630   if (FRecordSwitches && !Triple.isOSBinFormatELF() &&
7631       !Triple.isOSBinFormatXCOFF() && !Triple.isOSBinFormatMachO())
7632     D.Diag(diag::err_drv_unsupported_opt_for_target)
7633         << Args.getLastArg(options::OPT_frecord_command_line)->getAsString(Args)
7634         << TripleStr;
7635   if (TC.UseDwarfDebugFlags() || GRecordSwitches || FRecordSwitches) {
7636     ArgStringList OriginalArgs;
7637     for (const auto &Arg : Args)
7638       Arg->render(Args, OriginalArgs);
7639 
7640     SmallString<256> Flags;
7641     EscapeSpacesAndBackslashes(Exec, Flags);
7642     for (const char *OriginalArg : OriginalArgs) {
7643       SmallString<128> EscapedArg;
7644       EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
7645       Flags += " ";
7646       Flags += EscapedArg;
7647     }
7648     auto FlagsArgString = Args.MakeArgString(Flags);
7649     if (TC.UseDwarfDebugFlags() || GRecordSwitches) {
7650       CmdArgs.push_back("-dwarf-debug-flags");
7651       CmdArgs.push_back(FlagsArgString);
7652     }
7653     if (FRecordSwitches) {
7654       CmdArgs.push_back("-record-command-line");
7655       CmdArgs.push_back(FlagsArgString);
7656     }
7657   }
7658 
7659   // Host-side offloading compilation receives all device-side outputs. Include
7660   // them in the host compilation depending on the target. If the host inputs
7661   // are not empty we use the new-driver scheme, otherwise use the old scheme.
7662   if ((IsCuda || IsHIP) && CudaDeviceInput) {
7663     CmdArgs.push_back("-fcuda-include-gpubinary");
7664     CmdArgs.push_back(CudaDeviceInput->getFilename());
7665   } else if (!HostOffloadingInputs.empty()) {
7666     if ((IsCuda || IsHIP) && !IsRDCMode) {
7667       assert(HostOffloadingInputs.size() == 1 && "Only one input expected");
7668       CmdArgs.push_back("-fcuda-include-gpubinary");
7669       CmdArgs.push_back(HostOffloadingInputs.front().getFilename());
7670     } else {
7671       for (const InputInfo Input : HostOffloadingInputs)
7672         CmdArgs.push_back(Args.MakeArgString("-fembed-offload-object=" +
7673                                              TC.getInputFilename(Input)));
7674     }
7675   }
7676 
7677   if (IsCuda) {
7678     if (Args.hasFlag(options::OPT_fcuda_short_ptr,
7679                      options::OPT_fno_cuda_short_ptr, false))
7680       CmdArgs.push_back("-fcuda-short-ptr");
7681   }
7682 
7683   if (IsCuda || IsHIP) {
7684     // Determine the original source input.
7685     const Action *SourceAction = &JA;
7686     while (SourceAction->getKind() != Action::InputClass) {
7687       assert(!SourceAction->getInputs().empty() && "unexpected root action!");
7688       SourceAction = SourceAction->getInputs()[0];
7689     }
7690     auto CUID = cast<InputAction>(SourceAction)->getId();
7691     if (!CUID.empty())
7692       CmdArgs.push_back(Args.MakeArgString(Twine("-cuid=") + Twine(CUID)));
7693 
7694     // -ffast-math turns on -fgpu-approx-transcendentals implicitly, but will
7695     // be overriden by -fno-gpu-approx-transcendentals.
7696     bool UseApproxTranscendentals = Args.hasFlag(
7697         options::OPT_ffast_math, options::OPT_fno_fast_math, false);
7698     if (Args.hasFlag(options::OPT_fgpu_approx_transcendentals,
7699                      options::OPT_fno_gpu_approx_transcendentals,
7700                      UseApproxTranscendentals))
7701       CmdArgs.push_back("-fgpu-approx-transcendentals");
7702   } else {
7703     Args.claimAllArgs(options::OPT_fgpu_approx_transcendentals,
7704                       options::OPT_fno_gpu_approx_transcendentals);
7705   }
7706 
7707   if (IsHIP) {
7708     CmdArgs.push_back("-fcuda-allow-variadic-functions");
7709     Args.AddLastArg(CmdArgs, options::OPT_fgpu_default_stream_EQ);
7710   }
7711 
7712   Args.AddLastArg(CmdArgs, options::OPT_foffload_uniform_block,
7713                   options::OPT_fno_offload_uniform_block);
7714 
7715   Args.AddLastArg(CmdArgs, options::OPT_foffload_implicit_host_device_templates,
7716                   options::OPT_fno_offload_implicit_host_device_templates);
7717 
7718   if (IsCudaDevice || IsHIPDevice) {
7719     StringRef InlineThresh =
7720         Args.getLastArgValue(options::OPT_fgpu_inline_threshold_EQ);
7721     if (!InlineThresh.empty()) {
7722       std::string ArgStr =
7723           std::string("-inline-threshold=") + InlineThresh.str();
7724       CmdArgs.append({"-mllvm", Args.MakeArgStringRef(ArgStr)});
7725     }
7726   }
7727 
7728   if (IsHIPDevice)
7729     Args.addOptOutFlag(CmdArgs,
7730                        options::OPT_fhip_fp32_correctly_rounded_divide_sqrt,
7731                        options::OPT_fno_hip_fp32_correctly_rounded_divide_sqrt);
7732 
7733   // OpenMP offloading device jobs take the argument -fopenmp-host-ir-file-path
7734   // to specify the result of the compile phase on the host, so the meaningful
7735   // device declarations can be identified. Also, -fopenmp-is-target-device is
7736   // passed along to tell the frontend that it is generating code for a device,
7737   // so that only the relevant declarations are emitted.
7738   if (IsOpenMPDevice) {
7739     CmdArgs.push_back("-fopenmp-is-target-device");
7740     if (OpenMPDeviceInput) {
7741       CmdArgs.push_back("-fopenmp-host-ir-file-path");
7742       CmdArgs.push_back(Args.MakeArgString(OpenMPDeviceInput->getFilename()));
7743     }
7744   }
7745 
7746   if (Triple.isAMDGPU()) {
7747     handleAMDGPUCodeObjectVersionOptions(D, Args, CmdArgs);
7748 
7749     Args.addOptInFlag(CmdArgs, options::OPT_munsafe_fp_atomics,
7750                       options::OPT_mno_unsafe_fp_atomics);
7751     Args.addOptOutFlag(CmdArgs, options::OPT_mamdgpu_ieee,
7752                        options::OPT_mno_amdgpu_ieee);
7753   }
7754 
7755   // For all the host OpenMP offloading compile jobs we need to pass the targets
7756   // information using -fopenmp-targets= option.
7757   if (JA.isHostOffloading(Action::OFK_OpenMP)) {
7758     SmallString<128> Targets("-fopenmp-targets=");
7759 
7760     SmallVector<std::string, 4> Triples;
7761     auto TCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
7762     std::transform(TCRange.first, TCRange.second, std::back_inserter(Triples),
7763                    [](auto TC) { return TC.second->getTripleString(); });
7764     CmdArgs.push_back(Args.MakeArgString(Targets + llvm::join(Triples, ",")));
7765   }
7766 
7767   bool VirtualFunctionElimination =
7768       Args.hasFlag(options::OPT_fvirtual_function_elimination,
7769                    options::OPT_fno_virtual_function_elimination, false);
7770   if (VirtualFunctionElimination) {
7771     // VFE requires full LTO (currently, this might be relaxed to allow ThinLTO
7772     // in the future).
7773     if (LTOMode != LTOK_Full)
7774       D.Diag(diag::err_drv_argument_only_allowed_with)
7775           << "-fvirtual-function-elimination"
7776           << "-flto=full";
7777 
7778     CmdArgs.push_back("-fvirtual-function-elimination");
7779   }
7780 
7781   // VFE requires whole-program-vtables, and enables it by default.
7782   bool WholeProgramVTables = Args.hasFlag(
7783       options::OPT_fwhole_program_vtables,
7784       options::OPT_fno_whole_program_vtables, VirtualFunctionElimination);
7785   if (VirtualFunctionElimination && !WholeProgramVTables) {
7786     D.Diag(diag::err_drv_argument_not_allowed_with)
7787         << "-fno-whole-program-vtables"
7788         << "-fvirtual-function-elimination";
7789   }
7790 
7791   if (WholeProgramVTables) {
7792     // PS4 uses the legacy LTO API, which does not support this feature in
7793     // ThinLTO mode.
7794     bool IsPS4 = getToolChain().getTriple().isPS4();
7795 
7796     // Check if we passed LTO options but they were suppressed because this is a
7797     // device offloading action, or we passed device offload LTO options which
7798     // were suppressed because this is not the device offload action.
7799     // Check if we are using PS4 in regular LTO mode.
7800     // Otherwise, issue an error.
7801     if ((!IsUsingLTO && !D.isUsingLTO(!IsDeviceOffloadAction)) ||
7802         (IsPS4 && !UnifiedLTO && (D.getLTOMode() != LTOK_Full)))
7803       D.Diag(diag::err_drv_argument_only_allowed_with)
7804           << "-fwhole-program-vtables"
7805           << ((IsPS4 && !UnifiedLTO) ? "-flto=full" : "-flto");
7806 
7807     // Propagate -fwhole-program-vtables if this is an LTO compile.
7808     if (IsUsingLTO)
7809       CmdArgs.push_back("-fwhole-program-vtables");
7810   }
7811 
7812   bool DefaultsSplitLTOUnit =
7813       ((WholeProgramVTables || SanitizeArgs.needsLTO()) &&
7814           (LTOMode == LTOK_Full || TC.canSplitThinLTOUnit())) ||
7815       (!Triple.isPS4() && UnifiedLTO);
7816   bool SplitLTOUnit =
7817       Args.hasFlag(options::OPT_fsplit_lto_unit,
7818                    options::OPT_fno_split_lto_unit, DefaultsSplitLTOUnit);
7819   if (SanitizeArgs.needsLTO() && !SplitLTOUnit)
7820     D.Diag(diag::err_drv_argument_not_allowed_with) << "-fno-split-lto-unit"
7821                                                     << "-fsanitize=cfi";
7822   if (SplitLTOUnit)
7823     CmdArgs.push_back("-fsplit-lto-unit");
7824 
7825   if (Arg *A = Args.getLastArg(options::OPT_ffat_lto_objects,
7826                                options::OPT_fno_fat_lto_objects)) {
7827     if (IsUsingLTO && A->getOption().matches(options::OPT_ffat_lto_objects)) {
7828       assert(LTOMode == LTOK_Full || LTOMode == LTOK_Thin);
7829       if (!Triple.isOSBinFormatELF()) {
7830         D.Diag(diag::err_drv_unsupported_opt_for_target)
7831             << A->getAsString(Args) << TC.getTripleString();
7832       }
7833       CmdArgs.push_back(Args.MakeArgString(
7834           Twine("-flto=") + (LTOMode == LTOK_Thin ? "thin" : "full")));
7835       CmdArgs.push_back("-flto-unit");
7836       CmdArgs.push_back("-ffat-lto-objects");
7837       A->render(Args, CmdArgs);
7838     }
7839   }
7840 
7841   if (Arg *A = Args.getLastArg(options::OPT_fglobal_isel,
7842                                options::OPT_fno_global_isel)) {
7843     CmdArgs.push_back("-mllvm");
7844     if (A->getOption().matches(options::OPT_fglobal_isel)) {
7845       CmdArgs.push_back("-global-isel=1");
7846 
7847       // GISel is on by default on AArch64 -O0, so don't bother adding
7848       // the fallback remarks for it. Other combinations will add a warning of
7849       // some kind.
7850       bool IsArchSupported = Triple.getArch() == llvm::Triple::aarch64;
7851       bool IsOptLevelSupported = false;
7852 
7853       Arg *A = Args.getLastArg(options::OPT_O_Group);
7854       if (Triple.getArch() == llvm::Triple::aarch64) {
7855         if (!A || A->getOption().matches(options::OPT_O0))
7856           IsOptLevelSupported = true;
7857       }
7858       if (!IsArchSupported || !IsOptLevelSupported) {
7859         CmdArgs.push_back("-mllvm");
7860         CmdArgs.push_back("-global-isel-abort=2");
7861 
7862         if (!IsArchSupported)
7863           D.Diag(diag::warn_drv_global_isel_incomplete) << Triple.getArchName();
7864         else
7865           D.Diag(diag::warn_drv_global_isel_incomplete_opt);
7866       }
7867     } else {
7868       CmdArgs.push_back("-global-isel=0");
7869     }
7870   }
7871 
7872   if (Args.hasArg(options::OPT_forder_file_instrumentation)) {
7873      CmdArgs.push_back("-forder-file-instrumentation");
7874      // Enable order file instrumentation when ThinLTO is not on. When ThinLTO is
7875      // on, we need to pass these flags as linker flags and that will be handled
7876      // outside of the compiler.
7877      if (!IsUsingLTO) {
7878        CmdArgs.push_back("-mllvm");
7879        CmdArgs.push_back("-enable-order-file-instrumentation");
7880      }
7881   }
7882 
7883   if (Arg *A = Args.getLastArg(options::OPT_fforce_enable_int128,
7884                                options::OPT_fno_force_enable_int128)) {
7885     if (A->getOption().matches(options::OPT_fforce_enable_int128))
7886       CmdArgs.push_back("-fforce-enable-int128");
7887   }
7888 
7889   Args.addOptInFlag(CmdArgs, options::OPT_fkeep_static_consts,
7890                     options::OPT_fno_keep_static_consts);
7891   Args.addOptInFlag(CmdArgs, options::OPT_fkeep_persistent_storage_variables,
7892                     options::OPT_fno_keep_persistent_storage_variables);
7893   Args.addOptInFlag(CmdArgs, options::OPT_fcomplete_member_pointers,
7894                     options::OPT_fno_complete_member_pointers);
7895   Args.addOptOutFlag(CmdArgs, options::OPT_fcxx_static_destructors,
7896                      options::OPT_fno_cxx_static_destructors);
7897 
7898   addMachineOutlinerArgs(D, Args, CmdArgs, Triple, /*IsLTO=*/false);
7899 
7900   addOutlineAtomicsArgs(D, getToolChain(), Args, CmdArgs, Triple);
7901 
7902   if (Triple.isAArch64() &&
7903       (Args.hasArg(options::OPT_mno_fmv) ||
7904        (Triple.isAndroid() && Triple.isAndroidVersionLT(23)) ||
7905        getToolChain().GetRuntimeLibType(Args) != ToolChain::RLT_CompilerRT)) {
7906     // Disable Function Multiversioning on AArch64 target.
7907     CmdArgs.push_back("-target-feature");
7908     CmdArgs.push_back("-fmv");
7909   }
7910 
7911   if (Args.hasFlag(options::OPT_faddrsig, options::OPT_fno_addrsig,
7912                    (TC.getTriple().isOSBinFormatELF() ||
7913                     TC.getTriple().isOSBinFormatCOFF()) &&
7914                        !TC.getTriple().isPS4() && !TC.getTriple().isVE() &&
7915                        !TC.getTriple().isOSNetBSD() &&
7916                        !Distro(D.getVFS(), TC.getTriple()).IsGentoo() &&
7917                        !TC.getTriple().isAndroid() && TC.useIntegratedAs()))
7918     CmdArgs.push_back("-faddrsig");
7919 
7920   if ((Triple.isOSBinFormatELF() || Triple.isOSBinFormatMachO()) &&
7921       (EH || UnwindTables || AsyncUnwindTables ||
7922        DebugInfoKind != llvm::codegenoptions::NoDebugInfo))
7923     CmdArgs.push_back("-D__GCC_HAVE_DWARF2_CFI_ASM=1");
7924 
7925   if (Arg *A = Args.getLastArg(options::OPT_fsymbol_partition_EQ)) {
7926     std::string Str = A->getAsString(Args);
7927     if (!TC.getTriple().isOSBinFormatELF())
7928       D.Diag(diag::err_drv_unsupported_opt_for_target)
7929           << Str << TC.getTripleString();
7930     CmdArgs.push_back(Args.MakeArgString(Str));
7931   }
7932 
7933   // Add the "-o out -x type src.c" flags last. This is done primarily to make
7934   // the -cc1 command easier to edit when reproducing compiler crashes.
7935   if (Output.getType() == types::TY_Dependencies) {
7936     // Handled with other dependency code.
7937   } else if (Output.isFilename()) {
7938     if (Output.getType() == clang::driver::types::TY_IFS_CPP ||
7939         Output.getType() == clang::driver::types::TY_IFS) {
7940       SmallString<128> OutputFilename(Output.getFilename());
7941       llvm::sys::path::replace_extension(OutputFilename, "ifs");
7942       CmdArgs.push_back("-o");
7943       CmdArgs.push_back(Args.MakeArgString(OutputFilename));
7944     } else {
7945       CmdArgs.push_back("-o");
7946       CmdArgs.push_back(Output.getFilename());
7947     }
7948   } else {
7949     assert(Output.isNothing() && "Invalid output.");
7950   }
7951 
7952   addDashXForInput(Args, Input, CmdArgs);
7953 
7954   ArrayRef<InputInfo> FrontendInputs = Input;
7955   if (IsExtractAPI)
7956     FrontendInputs = ExtractAPIInputs;
7957   else if (Input.isNothing())
7958     FrontendInputs = {};
7959 
7960   for (const InputInfo &Input : FrontendInputs) {
7961     if (Input.isFilename())
7962       CmdArgs.push_back(Input.getFilename());
7963     else
7964       Input.getInputArg().renderAsInput(Args, CmdArgs);
7965   }
7966 
7967   if (D.CC1Main && !D.CCGenDiagnostics) {
7968     // Invoke the CC1 directly in this process
7969     C.addCommand(std::make_unique<CC1Command>(
7970         JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs,
7971         Output, D.getPrependArg()));
7972   } else {
7973     C.addCommand(std::make_unique<Command>(
7974         JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs,
7975         Output, D.getPrependArg()));
7976   }
7977 
7978   // Make the compile command echo its inputs for /showFilenames.
7979   if (Output.getType() == types::TY_Object &&
7980       Args.hasFlag(options::OPT__SLASH_showFilenames,
7981                    options::OPT__SLASH_showFilenames_, false)) {
7982     C.getJobs().getJobs().back()->PrintInputFilenames = true;
7983   }
7984 
7985   if (Arg *A = Args.getLastArg(options::OPT_pg))
7986     if (FPKeepKind == CodeGenOptions::FramePointerKind::None &&
7987         !Args.hasArg(options::OPT_mfentry))
7988       D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
7989                                                       << A->getAsString(Args);
7990 
7991   // Claim some arguments which clang supports automatically.
7992 
7993   // -fpch-preprocess is used with gcc to add a special marker in the output to
7994   // include the PCH file.
7995   Args.ClaimAllArgs(options::OPT_fpch_preprocess);
7996 
7997   // Claim some arguments which clang doesn't support, but we don't
7998   // care to warn the user about.
7999   Args.ClaimAllArgs(options::OPT_clang_ignored_f_Group);
8000   Args.ClaimAllArgs(options::OPT_clang_ignored_m_Group);
8001 
8002   // Disable warnings for clang -E -emit-llvm foo.c
8003   Args.ClaimAllArgs(options::OPT_emit_llvm);
8004 }
8005 
Clang(const ToolChain & TC,bool HasIntegratedBackend)8006 Clang::Clang(const ToolChain &TC, bool HasIntegratedBackend)
8007     // CAUTION! The first constructor argument ("clang") is not arbitrary,
8008     // as it is for other tools. Some operations on a Tool actually test
8009     // whether that tool is Clang based on the Tool's Name as a string.
8010     : Tool("clang", "clang frontend", TC), HasBackend(HasIntegratedBackend) {}
8011 
~Clang()8012 Clang::~Clang() {}
8013 
8014 /// Add options related to the Objective-C runtime/ABI.
8015 ///
8016 /// Returns true if the runtime is non-fragile.
AddObjCRuntimeArgs(const ArgList & args,const InputInfoList & inputs,ArgStringList & cmdArgs,RewriteKind rewriteKind) const8017 ObjCRuntime Clang::AddObjCRuntimeArgs(const ArgList &args,
8018                                       const InputInfoList &inputs,
8019                                       ArgStringList &cmdArgs,
8020                                       RewriteKind rewriteKind) const {
8021   // Look for the controlling runtime option.
8022   Arg *runtimeArg =
8023       args.getLastArg(options::OPT_fnext_runtime, options::OPT_fgnu_runtime,
8024                       options::OPT_fobjc_runtime_EQ);
8025 
8026   // Just forward -fobjc-runtime= to the frontend.  This supercedes
8027   // options about fragility.
8028   if (runtimeArg &&
8029       runtimeArg->getOption().matches(options::OPT_fobjc_runtime_EQ)) {
8030     ObjCRuntime runtime;
8031     StringRef value = runtimeArg->getValue();
8032     if (runtime.tryParse(value)) {
8033       getToolChain().getDriver().Diag(diag::err_drv_unknown_objc_runtime)
8034           << value;
8035     }
8036     if ((runtime.getKind() == ObjCRuntime::GNUstep) &&
8037         (runtime.getVersion() >= VersionTuple(2, 0)))
8038       if (!getToolChain().getTriple().isOSBinFormatELF() &&
8039           !getToolChain().getTriple().isOSBinFormatCOFF()) {
8040         getToolChain().getDriver().Diag(
8041             diag::err_drv_gnustep_objc_runtime_incompatible_binary)
8042           << runtime.getVersion().getMajor();
8043       }
8044 
8045     runtimeArg->render(args, cmdArgs);
8046     return runtime;
8047   }
8048 
8049   // Otherwise, we'll need the ABI "version".  Version numbers are
8050   // slightly confusing for historical reasons:
8051   //   1 - Traditional "fragile" ABI
8052   //   2 - Non-fragile ABI, version 1
8053   //   3 - Non-fragile ABI, version 2
8054   unsigned objcABIVersion = 1;
8055   // If -fobjc-abi-version= is present, use that to set the version.
8056   if (Arg *abiArg = args.getLastArg(options::OPT_fobjc_abi_version_EQ)) {
8057     StringRef value = abiArg->getValue();
8058     if (value == "1")
8059       objcABIVersion = 1;
8060     else if (value == "2")
8061       objcABIVersion = 2;
8062     else if (value == "3")
8063       objcABIVersion = 3;
8064     else
8065       getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) << value;
8066   } else {
8067     // Otherwise, determine if we are using the non-fragile ABI.
8068     bool nonFragileABIIsDefault =
8069         (rewriteKind == RK_NonFragile ||
8070          (rewriteKind == RK_None &&
8071           getToolChain().IsObjCNonFragileABIDefault()));
8072     if (args.hasFlag(options::OPT_fobjc_nonfragile_abi,
8073                      options::OPT_fno_objc_nonfragile_abi,
8074                      nonFragileABIIsDefault)) {
8075 // Determine the non-fragile ABI version to use.
8076 #ifdef DISABLE_DEFAULT_NONFRAGILEABI_TWO
8077       unsigned nonFragileABIVersion = 1;
8078 #else
8079       unsigned nonFragileABIVersion = 2;
8080 #endif
8081 
8082       if (Arg *abiArg =
8083               args.getLastArg(options::OPT_fobjc_nonfragile_abi_version_EQ)) {
8084         StringRef value = abiArg->getValue();
8085         if (value == "1")
8086           nonFragileABIVersion = 1;
8087         else if (value == "2")
8088           nonFragileABIVersion = 2;
8089         else
8090           getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
8091               << value;
8092       }
8093 
8094       objcABIVersion = 1 + nonFragileABIVersion;
8095     } else {
8096       objcABIVersion = 1;
8097     }
8098   }
8099 
8100   // We don't actually care about the ABI version other than whether
8101   // it's non-fragile.
8102   bool isNonFragile = objcABIVersion != 1;
8103 
8104   // If we have no runtime argument, ask the toolchain for its default runtime.
8105   // However, the rewriter only really supports the Mac runtime, so assume that.
8106   ObjCRuntime runtime;
8107   if (!runtimeArg) {
8108     switch (rewriteKind) {
8109     case RK_None:
8110       runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
8111       break;
8112     case RK_Fragile:
8113       runtime = ObjCRuntime(ObjCRuntime::FragileMacOSX, VersionTuple());
8114       break;
8115     case RK_NonFragile:
8116       runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
8117       break;
8118     }
8119 
8120     // -fnext-runtime
8121   } else if (runtimeArg->getOption().matches(options::OPT_fnext_runtime)) {
8122     // On Darwin, make this use the default behavior for the toolchain.
8123     if (getToolChain().getTriple().isOSDarwin()) {
8124       runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
8125 
8126       // Otherwise, build for a generic macosx port.
8127     } else {
8128       runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
8129     }
8130 
8131     // -fgnu-runtime
8132   } else {
8133     assert(runtimeArg->getOption().matches(options::OPT_fgnu_runtime));
8134     // Legacy behaviour is to target the gnustep runtime if we are in
8135     // non-fragile mode or the GCC runtime in fragile mode.
8136     if (isNonFragile)
8137       runtime = ObjCRuntime(ObjCRuntime::GNUstep, VersionTuple(2, 0));
8138     else
8139       runtime = ObjCRuntime(ObjCRuntime::GCC, VersionTuple());
8140   }
8141 
8142   if (llvm::any_of(inputs, [](const InputInfo &input) {
8143         return types::isObjC(input.getType());
8144       }))
8145     cmdArgs.push_back(
8146         args.MakeArgString("-fobjc-runtime=" + runtime.getAsString()));
8147   return runtime;
8148 }
8149 
maybeConsumeDash(const std::string & EH,size_t & I)8150 static bool maybeConsumeDash(const std::string &EH, size_t &I) {
8151   bool HaveDash = (I + 1 < EH.size() && EH[I + 1] == '-');
8152   I += HaveDash;
8153   return !HaveDash;
8154 }
8155 
8156 namespace {
8157 struct EHFlags {
8158   bool Synch = false;
8159   bool Asynch = false;
8160   bool NoUnwindC = false;
8161 };
8162 } // end anonymous namespace
8163 
8164 /// /EH controls whether to run destructor cleanups when exceptions are
8165 /// thrown.  There are three modifiers:
8166 /// - s: Cleanup after "synchronous" exceptions, aka C++ exceptions.
8167 /// - a: Cleanup after "asynchronous" exceptions, aka structured exceptions.
8168 ///      The 'a' modifier is unimplemented and fundamentally hard in LLVM IR.
8169 /// - c: Assume that extern "C" functions are implicitly nounwind.
8170 /// The default is /EHs-c-, meaning cleanups are disabled.
parseClangCLEHFlags(const Driver & D,const ArgList & Args,bool isWindowsMSVC)8171 static EHFlags parseClangCLEHFlags(const Driver &D, const ArgList &Args,
8172                                    bool isWindowsMSVC) {
8173   EHFlags EH;
8174 
8175   std::vector<std::string> EHArgs =
8176       Args.getAllArgValues(options::OPT__SLASH_EH);
8177   for (const auto &EHVal : EHArgs) {
8178     for (size_t I = 0, E = EHVal.size(); I != E; ++I) {
8179       switch (EHVal[I]) {
8180       case 'a':
8181         EH.Asynch = maybeConsumeDash(EHVal, I);
8182         if (EH.Asynch) {
8183           // Async exceptions are Windows MSVC only.
8184           if (!isWindowsMSVC) {
8185             EH.Asynch = false;
8186             D.Diag(clang::diag::warn_drv_unused_argument) << "/EHa" << EHVal;
8187             continue;
8188           }
8189           EH.Synch = false;
8190         }
8191         continue;
8192       case 'c':
8193         EH.NoUnwindC = maybeConsumeDash(EHVal, I);
8194         continue;
8195       case 's':
8196         EH.Synch = maybeConsumeDash(EHVal, I);
8197         if (EH.Synch)
8198           EH.Asynch = false;
8199         continue;
8200       default:
8201         break;
8202       }
8203       D.Diag(clang::diag::err_drv_invalid_value) << "/EH" << EHVal;
8204       break;
8205     }
8206   }
8207   // The /GX, /GX- flags are only processed if there are not /EH flags.
8208   // The default is that /GX is not specified.
8209   if (EHArgs.empty() &&
8210       Args.hasFlag(options::OPT__SLASH_GX, options::OPT__SLASH_GX_,
8211                    /*Default=*/false)) {
8212     EH.Synch = true;
8213     EH.NoUnwindC = true;
8214   }
8215 
8216   if (Args.hasArg(options::OPT__SLASH_kernel)) {
8217     EH.Synch = false;
8218     EH.NoUnwindC = false;
8219     EH.Asynch = false;
8220   }
8221 
8222   return EH;
8223 }
8224 
AddClangCLArgs(const ArgList & Args,types::ID InputType,ArgStringList & CmdArgs) const8225 void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
8226                            ArgStringList &CmdArgs) const {
8227   bool isNVPTX = getToolChain().getTriple().isNVPTX();
8228 
8229   ProcessVSRuntimeLibrary(getToolChain(), Args, CmdArgs);
8230 
8231   if (Arg *ShowIncludes =
8232           Args.getLastArg(options::OPT__SLASH_showIncludes,
8233                           options::OPT__SLASH_showIncludes_user)) {
8234     CmdArgs.push_back("--show-includes");
8235     if (ShowIncludes->getOption().matches(options::OPT__SLASH_showIncludes))
8236       CmdArgs.push_back("-sys-header-deps");
8237   }
8238 
8239   // This controls whether or not we emit RTTI data for polymorphic types.
8240   if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR,
8241                    /*Default=*/false))
8242     CmdArgs.push_back("-fno-rtti-data");
8243 
8244   // This controls whether or not we emit stack-protector instrumentation.
8245   // In MSVC, Buffer Security Check (/GS) is on by default.
8246   if (!isNVPTX && Args.hasFlag(options::OPT__SLASH_GS, options::OPT__SLASH_GS_,
8247                                /*Default=*/true)) {
8248     CmdArgs.push_back("-stack-protector");
8249     CmdArgs.push_back(Args.MakeArgString(Twine(LangOptions::SSPStrong)));
8250   }
8251 
8252   const Driver &D = getToolChain().getDriver();
8253 
8254   bool IsWindowsMSVC = getToolChain().getTriple().isWindowsMSVCEnvironment();
8255   EHFlags EH = parseClangCLEHFlags(D, Args, IsWindowsMSVC);
8256   if (!isNVPTX && (EH.Synch || EH.Asynch)) {
8257     if (types::isCXX(InputType))
8258       CmdArgs.push_back("-fcxx-exceptions");
8259     CmdArgs.push_back("-fexceptions");
8260     if (EH.Asynch)
8261       CmdArgs.push_back("-fasync-exceptions");
8262   }
8263   if (types::isCXX(InputType) && EH.Synch && EH.NoUnwindC)
8264     CmdArgs.push_back("-fexternc-nounwind");
8265 
8266   // /EP should expand to -E -P.
8267   if (Args.hasArg(options::OPT__SLASH_EP)) {
8268     CmdArgs.push_back("-E");
8269     CmdArgs.push_back("-P");
8270   }
8271 
8272  if (Args.hasFlag(options::OPT__SLASH_Zc_dllexportInlines_,
8273                   options::OPT__SLASH_Zc_dllexportInlines,
8274                   false)) {
8275   CmdArgs.push_back("-fno-dllexport-inlines");
8276  }
8277 
8278  if (Args.hasFlag(options::OPT__SLASH_Zc_wchar_t_,
8279                   options::OPT__SLASH_Zc_wchar_t, false)) {
8280    CmdArgs.push_back("-fno-wchar");
8281  }
8282 
8283  if (Args.hasArg(options::OPT__SLASH_kernel)) {
8284    llvm::Triple::ArchType Arch = getToolChain().getArch();
8285    std::vector<std::string> Values =
8286        Args.getAllArgValues(options::OPT__SLASH_arch);
8287    if (!Values.empty()) {
8288      llvm::SmallSet<std::string, 4> SupportedArches;
8289      if (Arch == llvm::Triple::x86)
8290        SupportedArches.insert("IA32");
8291 
8292      for (auto &V : Values)
8293        if (!SupportedArches.contains(V))
8294          D.Diag(diag::err_drv_argument_not_allowed_with)
8295              << std::string("/arch:").append(V) << "/kernel";
8296    }
8297 
8298    CmdArgs.push_back("-fno-rtti");
8299    if (Args.hasFlag(options::OPT__SLASH_GR, options::OPT__SLASH_GR_, false))
8300      D.Diag(diag::err_drv_argument_not_allowed_with) << "/GR"
8301                                                      << "/kernel";
8302  }
8303 
8304   Arg *MostGeneralArg = Args.getLastArg(options::OPT__SLASH_vmg);
8305   Arg *BestCaseArg = Args.getLastArg(options::OPT__SLASH_vmb);
8306   if (MostGeneralArg && BestCaseArg)
8307     D.Diag(clang::diag::err_drv_argument_not_allowed_with)
8308         << MostGeneralArg->getAsString(Args) << BestCaseArg->getAsString(Args);
8309 
8310   if (MostGeneralArg) {
8311     Arg *SingleArg = Args.getLastArg(options::OPT__SLASH_vms);
8312     Arg *MultipleArg = Args.getLastArg(options::OPT__SLASH_vmm);
8313     Arg *VirtualArg = Args.getLastArg(options::OPT__SLASH_vmv);
8314 
8315     Arg *FirstConflict = SingleArg ? SingleArg : MultipleArg;
8316     Arg *SecondConflict = VirtualArg ? VirtualArg : MultipleArg;
8317     if (FirstConflict && SecondConflict && FirstConflict != SecondConflict)
8318       D.Diag(clang::diag::err_drv_argument_not_allowed_with)
8319           << FirstConflict->getAsString(Args)
8320           << SecondConflict->getAsString(Args);
8321 
8322     if (SingleArg)
8323       CmdArgs.push_back("-fms-memptr-rep=single");
8324     else if (MultipleArg)
8325       CmdArgs.push_back("-fms-memptr-rep=multiple");
8326     else
8327       CmdArgs.push_back("-fms-memptr-rep=virtual");
8328   }
8329 
8330   if (Args.hasArg(options::OPT_regcall4))
8331     CmdArgs.push_back("-regcall4");
8332 
8333   // Parse the default calling convention options.
8334   if (Arg *CCArg =
8335           Args.getLastArg(options::OPT__SLASH_Gd, options::OPT__SLASH_Gr,
8336                           options::OPT__SLASH_Gz, options::OPT__SLASH_Gv,
8337                           options::OPT__SLASH_Gregcall)) {
8338     unsigned DCCOptId = CCArg->getOption().getID();
8339     const char *DCCFlag = nullptr;
8340     bool ArchSupported = !isNVPTX;
8341     llvm::Triple::ArchType Arch = getToolChain().getArch();
8342     switch (DCCOptId) {
8343     case options::OPT__SLASH_Gd:
8344       DCCFlag = "-fdefault-calling-conv=cdecl";
8345       break;
8346     case options::OPT__SLASH_Gr:
8347       ArchSupported = Arch == llvm::Triple::x86;
8348       DCCFlag = "-fdefault-calling-conv=fastcall";
8349       break;
8350     case options::OPT__SLASH_Gz:
8351       ArchSupported = Arch == llvm::Triple::x86;
8352       DCCFlag = "-fdefault-calling-conv=stdcall";
8353       break;
8354     case options::OPT__SLASH_Gv:
8355       ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
8356       DCCFlag = "-fdefault-calling-conv=vectorcall";
8357       break;
8358     case options::OPT__SLASH_Gregcall:
8359       ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
8360       DCCFlag = "-fdefault-calling-conv=regcall";
8361       break;
8362     }
8363 
8364     // MSVC doesn't warn if /Gr or /Gz is used on x64, so we don't either.
8365     if (ArchSupported && DCCFlag)
8366       CmdArgs.push_back(DCCFlag);
8367   }
8368 
8369   if (Args.hasArg(options::OPT__SLASH_Gregcall4))
8370     CmdArgs.push_back("-regcall4");
8371 
8372   Args.AddLastArg(CmdArgs, options::OPT_vtordisp_mode_EQ);
8373 
8374   if (!Args.hasArg(options::OPT_fdiagnostics_format_EQ)) {
8375     CmdArgs.push_back("-fdiagnostics-format");
8376     CmdArgs.push_back("msvc");
8377   }
8378 
8379   if (Args.hasArg(options::OPT__SLASH_kernel))
8380     CmdArgs.push_back("-fms-kernel");
8381 
8382   for (const Arg *A : Args.filtered(options::OPT__SLASH_guard)) {
8383     StringRef GuardArgs = A->getValue();
8384     // The only valid options are "cf", "cf,nochecks", "cf-", "ehcont" and
8385     // "ehcont-".
8386     if (GuardArgs.equals_insensitive("cf")) {
8387       // Emit CFG instrumentation and the table of address-taken functions.
8388       CmdArgs.push_back("-cfguard");
8389     } else if (GuardArgs.equals_insensitive("cf,nochecks")) {
8390       // Emit only the table of address-taken functions.
8391       CmdArgs.push_back("-cfguard-no-checks");
8392     } else if (GuardArgs.equals_insensitive("ehcont")) {
8393       // Emit EH continuation table.
8394       CmdArgs.push_back("-ehcontguard");
8395     } else if (GuardArgs.equals_insensitive("cf-") ||
8396                GuardArgs.equals_insensitive("ehcont-")) {
8397       // Do nothing, but we might want to emit a security warning in future.
8398     } else {
8399       D.Diag(diag::err_drv_invalid_value) << A->getSpelling() << GuardArgs;
8400     }
8401     A->claim();
8402   }
8403 }
8404 
getBaseInputName(const ArgList & Args,const InputInfo & Input)8405 const char *Clang::getBaseInputName(const ArgList &Args,
8406                                     const InputInfo &Input) {
8407   return Args.MakeArgString(llvm::sys::path::filename(Input.getBaseInput()));
8408 }
8409 
getBaseInputStem(const ArgList & Args,const InputInfoList & Inputs)8410 const char *Clang::getBaseInputStem(const ArgList &Args,
8411                                     const InputInfoList &Inputs) {
8412   const char *Str = getBaseInputName(Args, Inputs[0]);
8413 
8414   if (const char *End = strrchr(Str, '.'))
8415     return Args.MakeArgString(std::string(Str, End));
8416 
8417   return Str;
8418 }
8419 
getDependencyFileName(const ArgList & Args,const InputInfoList & Inputs)8420 const char *Clang::getDependencyFileName(const ArgList &Args,
8421                                          const InputInfoList &Inputs) {
8422   // FIXME: Think about this more.
8423 
8424   if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) {
8425     SmallString<128> OutputFilename(OutputOpt->getValue());
8426     llvm::sys::path::replace_extension(OutputFilename, llvm::Twine('d'));
8427     return Args.MakeArgString(OutputFilename);
8428   }
8429 
8430   return Args.MakeArgString(Twine(getBaseInputStem(Args, Inputs)) + ".d");
8431 }
8432 
8433 // Begin ClangAs
8434 
AddMIPSTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const8435 void ClangAs::AddMIPSTargetArgs(const ArgList &Args,
8436                                 ArgStringList &CmdArgs) const {
8437   StringRef CPUName;
8438   StringRef ABIName;
8439   const llvm::Triple &Triple = getToolChain().getTriple();
8440   mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
8441 
8442   CmdArgs.push_back("-target-abi");
8443   CmdArgs.push_back(ABIName.data());
8444 }
8445 
AddX86TargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const8446 void ClangAs::AddX86TargetArgs(const ArgList &Args,
8447                                ArgStringList &CmdArgs) const {
8448   addX86AlignBranchArgs(getToolChain().getDriver(), Args, CmdArgs,
8449                         /*IsLTO=*/false);
8450 
8451   if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
8452     StringRef Value = A->getValue();
8453     if (Value == "intel" || Value == "att") {
8454       CmdArgs.push_back("-mllvm");
8455       CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
8456     } else {
8457       getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
8458           << A->getSpelling() << Value;
8459     }
8460   }
8461 }
8462 
AddLoongArchTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const8463 void ClangAs::AddLoongArchTargetArgs(const ArgList &Args,
8464                                      ArgStringList &CmdArgs) const {
8465   CmdArgs.push_back("-target-abi");
8466   CmdArgs.push_back(loongarch::getLoongArchABI(getToolChain().getDriver(), Args,
8467                                                getToolChain().getTriple())
8468                         .data());
8469 }
8470 
AddRISCVTargetArgs(const ArgList & Args,ArgStringList & CmdArgs) const8471 void ClangAs::AddRISCVTargetArgs(const ArgList &Args,
8472                                ArgStringList &CmdArgs) const {
8473   const llvm::Triple &Triple = getToolChain().getTriple();
8474   StringRef ABIName = riscv::getRISCVABI(Args, Triple);
8475 
8476   CmdArgs.push_back("-target-abi");
8477   CmdArgs.push_back(ABIName.data());
8478 
8479   if (Args.hasFlag(options::OPT_mdefault_build_attributes,
8480                    options::OPT_mno_default_build_attributes, true)) {
8481       CmdArgs.push_back("-mllvm");
8482       CmdArgs.push_back("-riscv-add-build-attributes");
8483   }
8484 }
8485 
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const8486 void ClangAs::ConstructJob(Compilation &C, const JobAction &JA,
8487                            const InputInfo &Output, const InputInfoList &Inputs,
8488                            const ArgList &Args,
8489                            const char *LinkingOutput) const {
8490   ArgStringList CmdArgs;
8491 
8492   assert(Inputs.size() == 1 && "Unexpected number of inputs.");
8493   const InputInfo &Input = Inputs[0];
8494 
8495   const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
8496   const std::string &TripleStr = Triple.getTriple();
8497   const auto &D = getToolChain().getDriver();
8498 
8499   // Don't warn about "clang -w -c foo.s"
8500   Args.ClaimAllArgs(options::OPT_w);
8501   // and "clang -emit-llvm -c foo.s"
8502   Args.ClaimAllArgs(options::OPT_emit_llvm);
8503 
8504   claimNoWarnArgs(Args);
8505 
8506   // Invoke ourselves in -cc1as mode.
8507   //
8508   // FIXME: Implement custom jobs for internal actions.
8509   CmdArgs.push_back("-cc1as");
8510 
8511   // Add the "effective" target triple.
8512   CmdArgs.push_back("-triple");
8513   CmdArgs.push_back(Args.MakeArgString(TripleStr));
8514 
8515   getToolChain().addClangCC1ASTargetOptions(Args, CmdArgs);
8516 
8517   // Set the output mode, we currently only expect to be used as a real
8518   // assembler.
8519   CmdArgs.push_back("-filetype");
8520   CmdArgs.push_back("obj");
8521 
8522   // Set the main file name, so that debug info works even with
8523   // -save-temps or preprocessed assembly.
8524   CmdArgs.push_back("-main-file-name");
8525   CmdArgs.push_back(Clang::getBaseInputName(Args, Input));
8526 
8527   // Add the target cpu
8528   std::string CPU = getCPUName(D, Args, Triple, /*FromAs*/ true);
8529   if (!CPU.empty()) {
8530     CmdArgs.push_back("-target-cpu");
8531     CmdArgs.push_back(Args.MakeArgString(CPU));
8532   }
8533 
8534   // Add the target features
8535   getTargetFeatures(D, Triple, Args, CmdArgs, true);
8536 
8537   // Ignore explicit -force_cpusubtype_ALL option.
8538   (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
8539 
8540   // Pass along any -I options so we get proper .include search paths.
8541   Args.AddAllArgs(CmdArgs, options::OPT_I_Group);
8542 
8543   // Pass along any --embed-dir or similar options so we get proper embed paths.
8544   Args.AddAllArgs(CmdArgs, options::OPT_embed_dir_EQ);
8545 
8546   // Determine the original source input.
8547   auto FindSource = [](const Action *S) -> const Action * {
8548     while (S->getKind() != Action::InputClass) {
8549       assert(!S->getInputs().empty() && "unexpected root action!");
8550       S = S->getInputs()[0];
8551     }
8552     return S;
8553   };
8554   const Action *SourceAction = FindSource(&JA);
8555 
8556   // Forward -g and handle debug info related flags, assuming we are dealing
8557   // with an actual assembly file.
8558   bool WantDebug = false;
8559   Args.ClaimAllArgs(options::OPT_g_Group);
8560   if (Arg *A = Args.getLastArg(options::OPT_g_Group))
8561     WantDebug = !A->getOption().matches(options::OPT_g0) &&
8562                 !A->getOption().matches(options::OPT_ggdb0);
8563 
8564   // If a -gdwarf argument appeared, remember it.
8565   bool EmitDwarf = false;
8566   if (const Arg *A = getDwarfNArg(Args))
8567     EmitDwarf = checkDebugInfoOption(A, Args, D, getToolChain());
8568 
8569   bool EmitCodeView = false;
8570   if (const Arg *A = Args.getLastArg(options::OPT_gcodeview))
8571     EmitCodeView = checkDebugInfoOption(A, Args, D, getToolChain());
8572 
8573   // If the user asked for debug info but did not explicitly specify -gcodeview
8574   // or -gdwarf, ask the toolchain for the default format.
8575   if (!EmitCodeView && !EmitDwarf && WantDebug) {
8576     switch (getToolChain().getDefaultDebugFormat()) {
8577     case llvm::codegenoptions::DIF_CodeView:
8578       EmitCodeView = true;
8579       break;
8580     case llvm::codegenoptions::DIF_DWARF:
8581       EmitDwarf = true;
8582       break;
8583     }
8584   }
8585 
8586   // If the arguments don't imply DWARF, don't emit any debug info here.
8587   if (!EmitDwarf)
8588     WantDebug = false;
8589 
8590   llvm::codegenoptions::DebugInfoKind DebugInfoKind =
8591       llvm::codegenoptions::NoDebugInfo;
8592 
8593   // Add the -fdebug-compilation-dir flag if needed.
8594   const char *DebugCompilationDir =
8595       addDebugCompDirArg(Args, CmdArgs, C.getDriver().getVFS());
8596 
8597   if (SourceAction->getType() == types::TY_Asm ||
8598       SourceAction->getType() == types::TY_PP_Asm) {
8599     // You might think that it would be ok to set DebugInfoKind outside of
8600     // the guard for source type, however there is a test which asserts
8601     // that some assembler invocation receives no -debug-info-kind,
8602     // and it's not clear whether that test is just overly restrictive.
8603     DebugInfoKind = (WantDebug ? llvm::codegenoptions::DebugInfoConstructor
8604                                : llvm::codegenoptions::NoDebugInfo);
8605 
8606     addDebugPrefixMapArg(getToolChain().getDriver(), getToolChain(), Args,
8607                          CmdArgs);
8608 
8609     // Set the AT_producer to the clang version when using the integrated
8610     // assembler on assembly source files.
8611     CmdArgs.push_back("-dwarf-debug-producer");
8612     CmdArgs.push_back(Args.MakeArgString(getClangFullVersion()));
8613 
8614     // And pass along -I options
8615     Args.AddAllArgs(CmdArgs, options::OPT_I);
8616   }
8617   const unsigned DwarfVersion = getDwarfVersion(getToolChain(), Args);
8618   RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion,
8619                           llvm::DebuggerKind::Default);
8620   renderDwarfFormat(D, Triple, Args, CmdArgs, DwarfVersion);
8621   RenderDebugInfoCompressionArgs(Args, CmdArgs, D, getToolChain());
8622 
8623   // Handle -fPIC et al -- the relocation-model affects the assembler
8624   // for some targets.
8625   llvm::Reloc::Model RelocationModel;
8626   unsigned PICLevel;
8627   bool IsPIE;
8628   std::tie(RelocationModel, PICLevel, IsPIE) =
8629       ParsePICArgs(getToolChain(), Args);
8630 
8631   const char *RMName = RelocationModelName(RelocationModel);
8632   if (RMName) {
8633     CmdArgs.push_back("-mrelocation-model");
8634     CmdArgs.push_back(RMName);
8635   }
8636 
8637   // Optionally embed the -cc1as level arguments into the debug info, for build
8638   // analysis.
8639   if (getToolChain().UseDwarfDebugFlags()) {
8640     ArgStringList OriginalArgs;
8641     for (const auto &Arg : Args)
8642       Arg->render(Args, OriginalArgs);
8643 
8644     SmallString<256> Flags;
8645     const char *Exec = getToolChain().getDriver().getClangProgramPath();
8646     EscapeSpacesAndBackslashes(Exec, Flags);
8647     for (const char *OriginalArg : OriginalArgs) {
8648       SmallString<128> EscapedArg;
8649       EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
8650       Flags += " ";
8651       Flags += EscapedArg;
8652     }
8653     CmdArgs.push_back("-dwarf-debug-flags");
8654     CmdArgs.push_back(Args.MakeArgString(Flags));
8655   }
8656 
8657   // FIXME: Add -static support, once we have it.
8658 
8659   // Add target specific flags.
8660   switch (getToolChain().getArch()) {
8661   default:
8662     break;
8663 
8664   case llvm::Triple::mips:
8665   case llvm::Triple::mipsel:
8666   case llvm::Triple::mips64:
8667   case llvm::Triple::mips64el:
8668     AddMIPSTargetArgs(Args, CmdArgs);
8669     break;
8670 
8671   case llvm::Triple::x86:
8672   case llvm::Triple::x86_64:
8673     AddX86TargetArgs(Args, CmdArgs);
8674     break;
8675 
8676   case llvm::Triple::arm:
8677   case llvm::Triple::armeb:
8678   case llvm::Triple::thumb:
8679   case llvm::Triple::thumbeb:
8680     // This isn't in AddARMTargetArgs because we want to do this for assembly
8681     // only, not C/C++.
8682     if (Args.hasFlag(options::OPT_mdefault_build_attributes,
8683                      options::OPT_mno_default_build_attributes, true)) {
8684         CmdArgs.push_back("-mllvm");
8685         CmdArgs.push_back("-arm-add-build-attributes");
8686     }
8687     break;
8688 
8689   case llvm::Triple::aarch64:
8690   case llvm::Triple::aarch64_32:
8691   case llvm::Triple::aarch64_be:
8692     if (Args.hasArg(options::OPT_mmark_bti_property)) {
8693       CmdArgs.push_back("-mllvm");
8694       CmdArgs.push_back("-aarch64-mark-bti-property");
8695     }
8696     break;
8697 
8698   case llvm::Triple::loongarch32:
8699   case llvm::Triple::loongarch64:
8700     AddLoongArchTargetArgs(Args, CmdArgs);
8701     break;
8702 
8703   case llvm::Triple::riscv32:
8704   case llvm::Triple::riscv64:
8705     AddRISCVTargetArgs(Args, CmdArgs);
8706     break;
8707 
8708   case llvm::Triple::hexagon:
8709     if (Args.hasFlag(options::OPT_mdefault_build_attributes,
8710                      options::OPT_mno_default_build_attributes, true)) {
8711       CmdArgs.push_back("-mllvm");
8712       CmdArgs.push_back("-hexagon-add-build-attributes");
8713     }
8714     break;
8715   }
8716 
8717   // Consume all the warning flags. Usually this would be handled more
8718   // gracefully by -cc1 (warning about unknown warning flags, etc) but -cc1as
8719   // doesn't handle that so rather than warning about unused flags that are
8720   // actually used, we'll lie by omission instead.
8721   // FIXME: Stop lying and consume only the appropriate driver flags
8722   Args.ClaimAllArgs(options::OPT_W_Group);
8723 
8724   CollectArgsForIntegratedAssembler(C, Args, CmdArgs,
8725                                     getToolChain().getDriver());
8726 
8727   Args.AddAllArgs(CmdArgs, options::OPT_mllvm);
8728 
8729   if (DebugInfoKind > llvm::codegenoptions::NoDebugInfo && Output.isFilename())
8730     addDebugObjectName(Args, CmdArgs, DebugCompilationDir,
8731                        Output.getFilename());
8732 
8733   // Fixup any previous commands that use -object-file-name because when we
8734   // generated them, the final .obj name wasn't yet known.
8735   for (Command &J : C.getJobs()) {
8736     if (SourceAction != FindSource(&J.getSource()))
8737       continue;
8738     auto &JArgs = J.getArguments();
8739     for (unsigned I = 0; I < JArgs.size(); ++I) {
8740       if (StringRef(JArgs[I]).starts_with("-object-file-name=") &&
8741           Output.isFilename()) {
8742        ArgStringList NewArgs(JArgs.begin(), JArgs.begin() + I);
8743        addDebugObjectName(Args, NewArgs, DebugCompilationDir,
8744                           Output.getFilename());
8745        NewArgs.append(JArgs.begin() + I + 1, JArgs.end());
8746        J.replaceArguments(NewArgs);
8747        break;
8748       }
8749     }
8750   }
8751 
8752   assert(Output.isFilename() && "Unexpected lipo output.");
8753   CmdArgs.push_back("-o");
8754   CmdArgs.push_back(Output.getFilename());
8755 
8756   const llvm::Triple &T = getToolChain().getTriple();
8757   Arg *A;
8758   if (getDebugFissionKind(D, Args, A) == DwarfFissionKind::Split &&
8759       T.isOSBinFormatELF()) {
8760     CmdArgs.push_back("-split-dwarf-output");
8761     CmdArgs.push_back(SplitDebugName(JA, Args, Input, Output));
8762   }
8763 
8764   if (Triple.isAMDGPU())
8765     handleAMDGPUCodeObjectVersionOptions(D, Args, CmdArgs, /*IsCC1As=*/true);
8766 
8767   assert(Input.isFilename() && "Invalid input.");
8768   CmdArgs.push_back(Input.getFilename());
8769 
8770   const char *Exec = getToolChain().getDriver().getClangProgramPath();
8771   if (D.CC1Main && !D.CCGenDiagnostics) {
8772     // Invoke cc1as directly in this process.
8773     C.addCommand(std::make_unique<CC1Command>(
8774         JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs,
8775         Output, D.getPrependArg()));
8776   } else {
8777     C.addCommand(std::make_unique<Command>(
8778         JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs,
8779         Output, D.getPrependArg()));
8780   }
8781 }
8782 
8783 // Begin OffloadBundler
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const llvm::opt::ArgList & TCArgs,const char * LinkingOutput) const8784 void OffloadBundler::ConstructJob(Compilation &C, const JobAction &JA,
8785                                   const InputInfo &Output,
8786                                   const InputInfoList &Inputs,
8787                                   const llvm::opt::ArgList &TCArgs,
8788                                   const char *LinkingOutput) const {
8789   // The version with only one output is expected to refer to a bundling job.
8790   assert(isa<OffloadBundlingJobAction>(JA) && "Expecting bundling job!");
8791 
8792   // The bundling command looks like this:
8793   // clang-offload-bundler -type=bc
8794   //   -targets=host-triple,openmp-triple1,openmp-triple2
8795   //   -output=output_file
8796   //   -input=unbundle_file_host
8797   //   -input=unbundle_file_tgt1
8798   //   -input=unbundle_file_tgt2
8799 
8800   ArgStringList CmdArgs;
8801 
8802   // Get the type.
8803   CmdArgs.push_back(TCArgs.MakeArgString(
8804       Twine("-type=") + types::getTypeTempSuffix(Output.getType())));
8805 
8806   assert(JA.getInputs().size() == Inputs.size() &&
8807          "Not have inputs for all dependence actions??");
8808 
8809   // Get the targets.
8810   SmallString<128> Triples;
8811   Triples += "-targets=";
8812   for (unsigned I = 0; I < Inputs.size(); ++I) {
8813     if (I)
8814       Triples += ',';
8815 
8816     // Find ToolChain for this input.
8817     Action::OffloadKind CurKind = Action::OFK_Host;
8818     const ToolChain *CurTC = &getToolChain();
8819     const Action *CurDep = JA.getInputs()[I];
8820 
8821     if (const auto *OA = dyn_cast<OffloadAction>(CurDep)) {
8822       CurTC = nullptr;
8823       OA->doOnEachDependence([&](Action *A, const ToolChain *TC, const char *) {
8824         assert(CurTC == nullptr && "Expected one dependence!");
8825         CurKind = A->getOffloadingDeviceKind();
8826         CurTC = TC;
8827       });
8828     }
8829     Triples += Action::GetOffloadKindName(CurKind);
8830     Triples += '-';
8831     Triples += CurTC->getTriple().normalize();
8832     if ((CurKind == Action::OFK_HIP || CurKind == Action::OFK_Cuda) &&
8833         !StringRef(CurDep->getOffloadingArch()).empty()) {
8834       Triples += '-';
8835       Triples += CurDep->getOffloadingArch();
8836     }
8837 
8838     // TODO: Replace parsing of -march flag. Can be done by storing GPUArch
8839     //       with each toolchain.
8840     StringRef GPUArchName;
8841     if (CurKind == Action::OFK_OpenMP) {
8842       // Extract GPUArch from -march argument in TC argument list.
8843       for (unsigned ArgIndex = 0; ArgIndex < TCArgs.size(); ArgIndex++) {
8844         auto ArchStr = StringRef(TCArgs.getArgString(ArgIndex));
8845         auto Arch = ArchStr.starts_with_insensitive("-march=");
8846         if (Arch) {
8847           GPUArchName = ArchStr.substr(7);
8848           Triples += "-";
8849           break;
8850         }
8851       }
8852       Triples += GPUArchName.str();
8853     }
8854   }
8855   CmdArgs.push_back(TCArgs.MakeArgString(Triples));
8856 
8857   // Get bundled file command.
8858   CmdArgs.push_back(
8859       TCArgs.MakeArgString(Twine("-output=") + Output.getFilename()));
8860 
8861   // Get unbundled files command.
8862   for (unsigned I = 0; I < Inputs.size(); ++I) {
8863     SmallString<128> UB;
8864     UB += "-input=";
8865 
8866     // Find ToolChain for this input.
8867     const ToolChain *CurTC = &getToolChain();
8868     if (const auto *OA = dyn_cast<OffloadAction>(JA.getInputs()[I])) {
8869       CurTC = nullptr;
8870       OA->doOnEachDependence([&](Action *, const ToolChain *TC, const char *) {
8871         assert(CurTC == nullptr && "Expected one dependence!");
8872         CurTC = TC;
8873       });
8874       UB += C.addTempFile(
8875           C.getArgs().MakeArgString(CurTC->getInputFilename(Inputs[I])));
8876     } else {
8877       UB += CurTC->getInputFilename(Inputs[I]);
8878     }
8879     CmdArgs.push_back(TCArgs.MakeArgString(UB));
8880   }
8881   addOffloadCompressArgs(TCArgs, CmdArgs);
8882   // All the inputs are encoded as commands.
8883   C.addCommand(std::make_unique<Command>(
8884       JA, *this, ResponseFileSupport::None(),
8885       TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
8886       CmdArgs, std::nullopt, Output));
8887 }
8888 
ConstructJobMultipleOutputs(Compilation & C,const JobAction & JA,const InputInfoList & Outputs,const InputInfoList & Inputs,const llvm::opt::ArgList & TCArgs,const char * LinkingOutput) const8889 void OffloadBundler::ConstructJobMultipleOutputs(
8890     Compilation &C, const JobAction &JA, const InputInfoList &Outputs,
8891     const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs,
8892     const char *LinkingOutput) const {
8893   // The version with multiple outputs is expected to refer to a unbundling job.
8894   auto &UA = cast<OffloadUnbundlingJobAction>(JA);
8895 
8896   // The unbundling command looks like this:
8897   // clang-offload-bundler -type=bc
8898   //   -targets=host-triple,openmp-triple1,openmp-triple2
8899   //   -input=input_file
8900   //   -output=unbundle_file_host
8901   //   -output=unbundle_file_tgt1
8902   //   -output=unbundle_file_tgt2
8903   //   -unbundle
8904 
8905   ArgStringList CmdArgs;
8906 
8907   assert(Inputs.size() == 1 && "Expecting to unbundle a single file!");
8908   InputInfo Input = Inputs.front();
8909 
8910   // Get the type.
8911   CmdArgs.push_back(TCArgs.MakeArgString(
8912       Twine("-type=") + types::getTypeTempSuffix(Input.getType())));
8913 
8914   // Get the targets.
8915   SmallString<128> Triples;
8916   Triples += "-targets=";
8917   auto DepInfo = UA.getDependentActionsInfo();
8918   for (unsigned I = 0; I < DepInfo.size(); ++I) {
8919     if (I)
8920       Triples += ',';
8921 
8922     auto &Dep = DepInfo[I];
8923     Triples += Action::GetOffloadKindName(Dep.DependentOffloadKind);
8924     Triples += '-';
8925     Triples += Dep.DependentToolChain->getTriple().normalize();
8926     if ((Dep.DependentOffloadKind == Action::OFK_HIP ||
8927          Dep.DependentOffloadKind == Action::OFK_Cuda) &&
8928         !Dep.DependentBoundArch.empty()) {
8929       Triples += '-';
8930       Triples += Dep.DependentBoundArch;
8931     }
8932     // TODO: Replace parsing of -march flag. Can be done by storing GPUArch
8933     //       with each toolchain.
8934     StringRef GPUArchName;
8935     if (Dep.DependentOffloadKind == Action::OFK_OpenMP) {
8936       // Extract GPUArch from -march argument in TC argument list.
8937       for (unsigned ArgIndex = 0; ArgIndex < TCArgs.size(); ArgIndex++) {
8938         StringRef ArchStr = StringRef(TCArgs.getArgString(ArgIndex));
8939         auto Arch = ArchStr.starts_with_insensitive("-march=");
8940         if (Arch) {
8941           GPUArchName = ArchStr.substr(7);
8942           Triples += "-";
8943           break;
8944         }
8945       }
8946       Triples += GPUArchName.str();
8947     }
8948   }
8949 
8950   CmdArgs.push_back(TCArgs.MakeArgString(Triples));
8951 
8952   // Get bundled file command.
8953   CmdArgs.push_back(
8954       TCArgs.MakeArgString(Twine("-input=") + Input.getFilename()));
8955 
8956   // Get unbundled files command.
8957   for (unsigned I = 0; I < Outputs.size(); ++I) {
8958     SmallString<128> UB;
8959     UB += "-output=";
8960     UB += DepInfo[I].DependentToolChain->getInputFilename(Outputs[I]);
8961     CmdArgs.push_back(TCArgs.MakeArgString(UB));
8962   }
8963   CmdArgs.push_back("-unbundle");
8964   CmdArgs.push_back("-allow-missing-bundles");
8965   if (TCArgs.hasArg(options::OPT_v))
8966     CmdArgs.push_back("-verbose");
8967 
8968   // All the inputs are encoded as commands.
8969   C.addCommand(std::make_unique<Command>(
8970       JA, *this, ResponseFileSupport::None(),
8971       TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
8972       CmdArgs, std::nullopt, Outputs));
8973 }
8974 
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const llvm::opt::ArgList & Args,const char * LinkingOutput) const8975 void OffloadPackager::ConstructJob(Compilation &C, const JobAction &JA,
8976                                    const InputInfo &Output,
8977                                    const InputInfoList &Inputs,
8978                                    const llvm::opt::ArgList &Args,
8979                                    const char *LinkingOutput) const {
8980   ArgStringList CmdArgs;
8981 
8982   // Add the output file name.
8983   assert(Output.isFilename() && "Invalid output.");
8984   CmdArgs.push_back("-o");
8985   CmdArgs.push_back(Output.getFilename());
8986 
8987   // Create the inputs to bundle the needed metadata.
8988   for (const InputInfo &Input : Inputs) {
8989     const Action *OffloadAction = Input.getAction();
8990     const ToolChain *TC = OffloadAction->getOffloadingToolChain();
8991     const ArgList &TCArgs =
8992         C.getArgsForToolChain(TC, OffloadAction->getOffloadingArch(),
8993                               OffloadAction->getOffloadingDeviceKind());
8994     StringRef File = C.getArgs().MakeArgString(TC->getInputFilename(Input));
8995     StringRef Arch = OffloadAction->getOffloadingArch()
8996                          ? OffloadAction->getOffloadingArch()
8997                          : TCArgs.getLastArgValue(options::OPT_march_EQ);
8998     StringRef Kind =
8999       Action::GetOffloadKindName(OffloadAction->getOffloadingDeviceKind());
9000 
9001     ArgStringList Features;
9002     SmallVector<StringRef> FeatureArgs;
9003     getTargetFeatures(TC->getDriver(), TC->getTriple(), TCArgs, Features,
9004                       false);
9005     llvm::copy_if(Features, std::back_inserter(FeatureArgs),
9006                   [](StringRef Arg) { return !Arg.starts_with("-target"); });
9007 
9008     if (TC->getTriple().isAMDGPU()) {
9009       for (StringRef Feature : llvm::split(Arch.split(':').second, ':')) {
9010         FeatureArgs.emplace_back(
9011             Args.MakeArgString(Feature.take_back() + Feature.drop_back()));
9012       }
9013     }
9014 
9015     // TODO: We need to pass in the full target-id and handle it properly in the
9016     // linker wrapper.
9017     SmallVector<std::string> Parts{
9018         "file=" + File.str(),
9019         "triple=" + TC->getTripleString(),
9020         "arch=" + Arch.str(),
9021         "kind=" + Kind.str(),
9022     };
9023 
9024     if (TC->getDriver().isUsingLTO(/* IsOffload */ true) ||
9025         TC->getTriple().isAMDGPU())
9026       for (StringRef Feature : FeatureArgs)
9027         Parts.emplace_back("feature=" + Feature.str());
9028 
9029     CmdArgs.push_back(Args.MakeArgString("--image=" + llvm::join(Parts, ",")));
9030   }
9031 
9032   C.addCommand(std::make_unique<Command>(
9033       JA, *this, ResponseFileSupport::None(),
9034       Args.MakeArgString(getToolChain().GetProgramPath(getShortName())),
9035       CmdArgs, Inputs, Output));
9036 }
9037 
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const9038 void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,
9039                                  const InputInfo &Output,
9040                                  const InputInfoList &Inputs,
9041                                  const ArgList &Args,
9042                                  const char *LinkingOutput) const {
9043   const Driver &D = getToolChain().getDriver();
9044   const llvm::Triple TheTriple = getToolChain().getTriple();
9045   ArgStringList CmdArgs;
9046 
9047   // Pass the CUDA path to the linker wrapper tool.
9048   for (Action::OffloadKind Kind : {Action::OFK_Cuda, Action::OFK_OpenMP}) {
9049     auto TCRange = C.getOffloadToolChains(Kind);
9050     for (auto &I : llvm::make_range(TCRange.first, TCRange.second)) {
9051       const ToolChain *TC = I.second;
9052       if (TC->getTriple().isNVPTX()) {
9053         CudaInstallationDetector CudaInstallation(D, TheTriple, Args);
9054         if (CudaInstallation.isValid())
9055           CmdArgs.push_back(Args.MakeArgString(
9056               "--cuda-path=" + CudaInstallation.getInstallPath()));
9057         break;
9058       }
9059     }
9060   }
9061 
9062   // Pass in the optimization level to use for LTO.
9063   if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) {
9064     StringRef OOpt;
9065     if (A->getOption().matches(options::OPT_O4) ||
9066         A->getOption().matches(options::OPT_Ofast))
9067       OOpt = "3";
9068     else if (A->getOption().matches(options::OPT_O)) {
9069       OOpt = A->getValue();
9070       if (OOpt == "g")
9071         OOpt = "1";
9072       else if (OOpt == "s" || OOpt == "z")
9073         OOpt = "2";
9074     } else if (A->getOption().matches(options::OPT_O0))
9075       OOpt = "0";
9076     if (!OOpt.empty())
9077       CmdArgs.push_back(Args.MakeArgString(Twine("--opt-level=O") + OOpt));
9078   }
9079 
9080   CmdArgs.push_back(
9081       Args.MakeArgString("--host-triple=" + TheTriple.getTriple()));
9082   if (Args.hasArg(options::OPT_v))
9083     CmdArgs.push_back("--wrapper-verbose");
9084 
9085   if (const Arg *A = Args.getLastArg(options::OPT_g_Group)) {
9086     if (!A->getOption().matches(options::OPT_g0))
9087       CmdArgs.push_back("--device-debug");
9088   }
9089 
9090   // code-object-version=X needs to be passed to clang-linker-wrapper to ensure
9091   // that it is used by lld.
9092   if (const Arg *A = Args.getLastArg(options::OPT_mcode_object_version_EQ)) {
9093     CmdArgs.push_back(Args.MakeArgString("-mllvm"));
9094     CmdArgs.push_back(Args.MakeArgString(
9095         Twine("--amdhsa-code-object-version=") + A->getValue()));
9096   }
9097 
9098   for (const auto &A : Args.getAllArgValues(options::OPT_Xcuda_ptxas))
9099     CmdArgs.push_back(Args.MakeArgString("--ptxas-arg=" + A));
9100 
9101   // Forward remarks passes to the LLVM backend in the wrapper.
9102   if (const Arg *A = Args.getLastArg(options::OPT_Rpass_EQ))
9103     CmdArgs.push_back(Args.MakeArgString(Twine("--offload-opt=-pass-remarks=") +
9104                                          A->getValue()));
9105   if (const Arg *A = Args.getLastArg(options::OPT_Rpass_missed_EQ))
9106     CmdArgs.push_back(Args.MakeArgString(
9107         Twine("--offload-opt=-pass-remarks-missed=") + A->getValue()));
9108   if (const Arg *A = Args.getLastArg(options::OPT_Rpass_analysis_EQ))
9109     CmdArgs.push_back(Args.MakeArgString(
9110         Twine("--offload-opt=-pass-remarks-analysis=") + A->getValue()));
9111   if (Args.getLastArg(options::OPT_save_temps_EQ))
9112     CmdArgs.push_back("--save-temps");
9113 
9114   // Construct the link job so we can wrap around it.
9115   Linker->ConstructJob(C, JA, Output, Inputs, Args, LinkingOutput);
9116   const auto &LinkCommand = C.getJobs().getJobs().back();
9117 
9118   // Forward -Xoffload-linker<-triple> arguments to the device link job.
9119   for (Arg *A : Args.filtered(options::OPT_Xoffload_linker)) {
9120     StringRef Val = A->getValue(0);
9121     if (Val.empty())
9122       CmdArgs.push_back(
9123           Args.MakeArgString(Twine("--device-linker=") + A->getValue(1)));
9124     else
9125       CmdArgs.push_back(Args.MakeArgString(
9126           "--device-linker=" +
9127           ToolChain::getOpenMPTriple(Val.drop_front()).getTriple() + "=" +
9128           A->getValue(1)));
9129   }
9130   Args.ClaimAllArgs(options::OPT_Xoffload_linker);
9131 
9132   // Embed bitcode instead of an object in JIT mode.
9133   if (Args.hasFlag(options::OPT_fopenmp_target_jit,
9134                    options::OPT_fno_openmp_target_jit, false))
9135     CmdArgs.push_back("--embed-bitcode");
9136 
9137   // Forward `-mllvm` arguments to the LLVM invocations if present.
9138   for (Arg *A : Args.filtered(options::OPT_mllvm)) {
9139     CmdArgs.push_back("-mllvm");
9140     CmdArgs.push_back(A->getValue());
9141     A->claim();
9142   }
9143 
9144   // Add the linker arguments to be forwarded by the wrapper.
9145   CmdArgs.push_back(Args.MakeArgString(Twine("--linker-path=") +
9146                                        LinkCommand->getExecutable()));
9147   for (const char *LinkArg : LinkCommand->getArguments())
9148     CmdArgs.push_back(LinkArg);
9149 
9150   addOffloadCompressArgs(Args, CmdArgs);
9151 
9152   const char *Exec =
9153       Args.MakeArgString(getToolChain().GetProgramPath("clang-linker-wrapper"));
9154 
9155   // Replace the executable and arguments of the link job with the
9156   // wrapper.
9157   LinkCommand->replaceExecutable(Exec);
9158   LinkCommand->replaceArguments(CmdArgs);
9159 }
9160