1 //===--- Hexagon.cpp - Hexagon 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 "Hexagon.h"
10 #include "clang/Driver/CommonArgs.h"
11 #include "clang/Driver/Compilation.h"
12 #include "clang/Driver/Driver.h"
13 #include "clang/Driver/InputInfo.h"
14 #include "clang/Driver/Options.h"
15 #include "llvm/Option/ArgList.h"
16 #include "llvm/Support/FileSystem.h"
17 #include "llvm/Support/Path.h"
18 #include "llvm/Support/VirtualFileSystem.h"
19
20 using namespace clang::driver;
21 using namespace clang::driver::tools;
22 using namespace clang::driver::toolchains;
23 using namespace clang;
24 using namespace llvm::opt;
25
26 // Default hvx-length for various versions.
getDefaultHvxLength(StringRef HvxVer)27 static StringRef getDefaultHvxLength(StringRef HvxVer) {
28 return llvm::StringSwitch<StringRef>(HvxVer)
29 .Case("v60", "64b")
30 .Case("v62", "64b")
31 .Case("v65", "64b")
32 .Default("128b");
33 }
34
handleHVXWarnings(const Driver & D,const ArgList & Args)35 static void handleHVXWarnings(const Driver &D, const ArgList &Args) {
36 // Handle the unsupported values passed to mhvx-length.
37 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
38 StringRef Val = A->getValue();
39 if (!Val.equals_insensitive("64b") && !Val.equals_insensitive("128b"))
40 D.Diag(diag::err_drv_unsupported_option_argument)
41 << A->getSpelling() << Val;
42 }
43 }
44
45 // Handle hvx target features explicitly.
handleHVXTargetFeatures(const Driver & D,const ArgList & Args,std::vector<StringRef> & Features,StringRef Cpu,bool & HasHVX)46 static void handleHVXTargetFeatures(const Driver &D, const ArgList &Args,
47 std::vector<StringRef> &Features,
48 StringRef Cpu, bool &HasHVX) {
49 // Handle HVX warnings.
50 handleHVXWarnings(D, Args);
51
52 auto makeFeature = [&Args](Twine T, bool Enable) -> StringRef {
53 const std::string &S = T.str();
54 StringRef Opt(S);
55 Opt.consume_back("=");
56 if (Opt.starts_with("mno-"))
57 Opt = Opt.drop_front(4);
58 else if (Opt.starts_with("m"))
59 Opt = Opt.drop_front(1);
60 return Args.MakeArgString(Twine(Enable ? "+" : "-") + Twine(Opt));
61 };
62
63 auto withMinus = [](StringRef S) -> std::string {
64 return "-" + S.str();
65 };
66
67 // Drop tiny core suffix for HVX version.
68 std::string HvxVer =
69 (Cpu.back() == 'T' || Cpu.back() == 't' ? Cpu.drop_back(1) : Cpu).str();
70 HasHVX = false;
71
72 // Handle -mhvx, -mhvx=, -mno-hvx. If versioned and versionless flags
73 // are both present, the last one wins.
74 Arg *HvxEnablingArg =
75 Args.getLastArg(options::OPT_mhexagon_hvx, options::OPT_mhexagon_hvx_EQ,
76 options::OPT_mno_hexagon_hvx);
77 if (HvxEnablingArg) {
78 if (HvxEnablingArg->getOption().matches(options::OPT_mno_hexagon_hvx))
79 HvxEnablingArg = nullptr;
80 }
81
82 if (HvxEnablingArg) {
83 // If -mhvx[=] was given, it takes precedence.
84 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx,
85 options::OPT_mhexagon_hvx_EQ)) {
86 // If the version was given, set HvxVer. Otherwise HvxVer
87 // will remain equal to the CPU version.
88 if (A->getOption().matches(options::OPT_mhexagon_hvx_EQ))
89 HvxVer = StringRef(A->getValue()).lower();
90 }
91 HasHVX = true;
92 Features.push_back(makeFeature(Twine("hvx") + HvxVer, true));
93 } else if (Arg *A = Args.getLastArg(options::OPT_mno_hexagon_hvx)) {
94 // If there was an explicit -mno-hvx, add -hvx to target features.
95 Features.push_back(makeFeature(A->getOption().getName(), false));
96 }
97
98 StringRef HvxLen = getDefaultHvxLength(HvxVer);
99
100 // Handle -mhvx-length=.
101 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
102 // These flags are valid only if HVX in enabled.
103 if (!HasHVX)
104 D.Diag(diag::err_drv_needs_hvx) << withMinus(A->getOption().getName());
105 else if (A->getOption().matches(options::OPT_mhexagon_hvx_length_EQ))
106 HvxLen = A->getValue();
107 }
108
109 if (HasHVX) {
110 StringRef L = makeFeature(Twine("hvx-length") + HvxLen.lower(), true);
111 Features.push_back(L);
112 }
113
114 unsigned HvxVerNum;
115 // getAsInteger returns 'true' on error.
116 if (StringRef(HvxVer).drop_front(1).getAsInteger(10, HvxVerNum))
117 HvxVerNum = 0;
118
119 // Handle HVX floating point flags.
120 auto checkFlagHvxVersion =
121 [&](auto FlagOn, auto FlagOff,
122 unsigned MinVerNum) -> std::optional<StringRef> {
123 // Return an std::optional<StringRef>:
124 // - std::nullopt indicates a verification failure, or that the flag was not
125 // present in Args.
126 // - Otherwise the returned value is that name of the feature to add
127 // to Features.
128 Arg *A = Args.getLastArg(FlagOn, FlagOff);
129 if (!A)
130 return std::nullopt;
131
132 StringRef OptName = A->getOption().getName();
133 if (A->getOption().matches(FlagOff))
134 return makeFeature(OptName, false);
135
136 if (!HasHVX) {
137 D.Diag(diag::err_drv_needs_hvx) << withMinus(OptName);
138 return std::nullopt;
139 }
140 if (HvxVerNum < MinVerNum) {
141 D.Diag(diag::err_drv_needs_hvx_version)
142 << withMinus(OptName) << ("v" + std::to_string(HvxVerNum));
143 return std::nullopt;
144 }
145 return makeFeature(OptName, true);
146 };
147
148 if (auto F = checkFlagHvxVersion(options::OPT_mhexagon_hvx_qfloat,
149 options::OPT_mno_hexagon_hvx_qfloat, 68)) {
150 Features.push_back(*F);
151 }
152 if (auto F = checkFlagHvxVersion(options::OPT_mhexagon_hvx_ieee_fp,
153 options::OPT_mno_hexagon_hvx_ieee_fp, 68)) {
154 Features.push_back(*F);
155 }
156 }
157
158 // Hexagon target features.
getHexagonTargetFeatures(const Driver & D,const llvm::Triple & Triple,const ArgList & Args,std::vector<StringRef> & Features)159 void hexagon::getHexagonTargetFeatures(const Driver &D,
160 const llvm::Triple &Triple,
161 const ArgList &Args,
162 std::vector<StringRef> &Features) {
163 handleTargetFeaturesGroup(D, Triple, Args, Features,
164 options::OPT_m_hexagon_Features_Group);
165
166 bool UseLongCalls = false;
167 if (Arg *A = Args.getLastArg(options::OPT_mlong_calls,
168 options::OPT_mno_long_calls)) {
169 if (A->getOption().matches(options::OPT_mlong_calls))
170 UseLongCalls = true;
171 }
172
173 Features.push_back(UseLongCalls ? "+long-calls" : "-long-calls");
174
175 bool HasHVX = false;
176 StringRef Cpu(toolchains::HexagonToolChain::GetTargetCPUVersion(Args));
177 // 't' in Cpu denotes tiny-core micro-architecture. For now, the co-processors
178 // have no dependency on micro-architecture.
179 const bool TinyCore = Cpu.contains('t');
180
181 if (TinyCore)
182 Cpu = Cpu.take_front(Cpu.size() - 1);
183
184 handleHVXTargetFeatures(D, Args, Features, Cpu, HasHVX);
185
186 if (HexagonToolChain::isAutoHVXEnabled(Args) && !HasHVX)
187 D.Diag(diag::warn_drv_needs_hvx) << "auto-vectorization";
188 }
189
190 // Hexagon tools start.
RenderExtraToolArgs(const JobAction & JA,ArgStringList & CmdArgs) const191 void hexagon::Assembler::RenderExtraToolArgs(const JobAction &JA,
192 ArgStringList &CmdArgs) const {
193 }
194
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const195 void hexagon::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
196 const InputInfo &Output,
197 const InputInfoList &Inputs,
198 const ArgList &Args,
199 const char *LinkingOutput) const {
200 claimNoWarnArgs(Args);
201
202 auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain());
203 const Driver &D = HTC.getDriver();
204 ArgStringList CmdArgs;
205
206 CmdArgs.push_back("--arch=hexagon");
207
208 RenderExtraToolArgs(JA, CmdArgs);
209
210 const char *AsName = "llvm-mc";
211 CmdArgs.push_back("-filetype=obj");
212 CmdArgs.push_back(Args.MakeArgString(
213 "-mcpu=hexagon" +
214 toolchains::HexagonToolChain::GetTargetCPUVersion(Args)));
215
216 addSanitizerRuntimes(HTC, Args, CmdArgs);
217
218 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
219 if (Output.isFilename()) {
220 CmdArgs.push_back("-o");
221 CmdArgs.push_back(Output.getFilename());
222 } else {
223 CmdArgs.push_back("-fsyntax-only");
224 }
225
226 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_ieee_fp,
227 options::OPT_mno_hexagon_hvx_ieee_fp)) {
228 if (A->getOption().matches(options::OPT_mhexagon_hvx_ieee_fp))
229 CmdArgs.push_back("-mhvx-ieee-fp");
230 }
231
232 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
233 CmdArgs.push_back(Args.MakeArgString("-gpsize=" + Twine(*G)));
234 }
235
236 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
237
238 // Only pass -x if gcc will understand it; otherwise hope gcc
239 // understands the suffix correctly. The main use case this would go
240 // wrong in is for linker inputs if they happened to have an odd
241 // suffix; really the only way to get this to happen is a command
242 // like '-x foobar a.c' which will treat a.c like a linker input.
243 //
244 // FIXME: For the linker case specifically, can we safely convert
245 // inputs into '-Wl,' options?
246 for (const auto &II : Inputs) {
247 // Don't try to pass LLVM or AST inputs to a generic gcc.
248 if (types::isLLVMIR(II.getType()))
249 D.Diag(clang::diag::err_drv_no_linker_llvm_support)
250 << HTC.getTripleString();
251 else if (II.getType() == types::TY_AST)
252 D.Diag(clang::diag::err_drv_no_ast_support)
253 << HTC.getTripleString();
254 else if (II.getType() == types::TY_ModuleFile)
255 D.Diag(diag::err_drv_no_module_support)
256 << HTC.getTripleString();
257
258 if (II.isFilename())
259 CmdArgs.push_back(II.getFilename());
260 else
261 // Don't render as input, we need gcc to do the translations.
262 // FIXME: What is this?
263 II.getInputArg().render(Args, CmdArgs);
264 }
265
266 auto *Exec = Args.MakeArgString(HTC.GetProgramPath(AsName));
267 C.addCommand(std::make_unique<Command>(JA, *this,
268 ResponseFileSupport::AtFileCurCP(),
269 Exec, CmdArgs, Inputs, Output));
270 }
271
RenderExtraToolArgs(const JobAction & JA,ArgStringList & CmdArgs) const272 void hexagon::Linker::RenderExtraToolArgs(const JobAction &JA,
273 ArgStringList &CmdArgs) const {
274 }
275
276 static void
constructHexagonLinkArgs(Compilation & C,const JobAction & JA,const toolchains::HexagonToolChain & HTC,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,ArgStringList & CmdArgs,const char * LinkingOutput)277 constructHexagonLinkArgs(Compilation &C, const JobAction &JA,
278 const toolchains::HexagonToolChain &HTC,
279 const InputInfo &Output, const InputInfoList &Inputs,
280 const ArgList &Args, ArgStringList &CmdArgs,
281 const char *LinkingOutput) {
282
283 const Driver &D = HTC.getDriver();
284
285 //----------------------------------------------------------------------------
286 //
287 //----------------------------------------------------------------------------
288 bool IsStatic = Args.hasArg(options::OPT_static);
289 bool IsShared = Args.hasArg(options::OPT_shared);
290 bool IsPIE = Args.hasArg(options::OPT_pie);
291 bool IncStdLib = !Args.hasArg(options::OPT_nostdlib);
292 bool IncStartFiles = !Args.hasArg(options::OPT_nostartfiles);
293 bool IncDefLibs = !Args.hasArg(options::OPT_nodefaultlibs);
294 bool UseG0 = false;
295 bool UseLLD = false;
296 const char *Exec = Args.MakeArgString(HTC.GetLinkerPath(&UseLLD));
297 UseLLD = UseLLD || llvm::sys::path::filename(Exec).ends_with("ld.lld") ||
298 llvm::sys::path::stem(Exec).ends_with("ld.lld");
299 bool UseShared = IsShared && !IsStatic;
300 StringRef CpuVer = toolchains::HexagonToolChain::GetTargetCPUVersion(Args);
301
302 bool NeedsSanitizerDeps = addSanitizerRuntimes(HTC, Args, CmdArgs);
303 bool NeedsXRayDeps = addXRayRuntime(HTC, Args, CmdArgs);
304
305 //----------------------------------------------------------------------------
306 // Silence warnings for various options
307 //----------------------------------------------------------------------------
308 Args.ClaimAllArgs(options::OPT_g_Group);
309 Args.ClaimAllArgs(options::OPT_emit_llvm);
310 Args.ClaimAllArgs(options::OPT_w); // Other warning options are already
311 // handled somewhere else.
312 Args.ClaimAllArgs(options::OPT_static_libgcc);
313
314 CmdArgs.push_back("--eh-frame-hdr");
315 //----------------------------------------------------------------------------
316 //
317 //----------------------------------------------------------------------------
318 if (Args.hasArg(options::OPT_s))
319 CmdArgs.push_back("-s");
320
321 if (Args.hasArg(options::OPT_r))
322 CmdArgs.push_back("-r");
323
324 for (const auto &Opt : HTC.ExtraOpts)
325 CmdArgs.push_back(Opt.c_str());
326
327 if (!UseLLD) {
328 CmdArgs.push_back("-march=hexagon");
329 CmdArgs.push_back(Args.MakeArgString("-mcpu=hexagon" + CpuVer));
330 }
331
332 if (IsShared) {
333 CmdArgs.push_back("-shared");
334 // The following should be the default, but doing as hexagon-gcc does.
335 CmdArgs.push_back("-call_shared");
336 }
337
338 if (IsStatic)
339 CmdArgs.push_back("-static");
340
341 if (IsPIE && !IsShared)
342 CmdArgs.push_back("-pie");
343
344 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
345 CmdArgs.push_back(Args.MakeArgString("-G" + Twine(*G)));
346 UseG0 = *G == 0;
347 }
348
349 CmdArgs.push_back("-o");
350 CmdArgs.push_back(Output.getFilename());
351
352 if (HTC.getTriple().isMusl()) {
353 if (!Args.hasArg(options::OPT_shared, options::OPT_static))
354 CmdArgs.push_back("-dynamic-linker=/lib/ld-musl-hexagon.so.1");
355
356 if (!Args.hasArg(options::OPT_shared, options::OPT_nostartfiles,
357 options::OPT_nostdlib))
358 CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crt1.o"));
359 else if (Args.hasArg(options::OPT_shared) &&
360 !Args.hasArg(options::OPT_nostartfiles, options::OPT_nostdlib))
361 CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crti.o"));
362
363 CmdArgs.push_back(
364 Args.MakeArgString(StringRef("-L") + D.SysRoot + "/usr/lib"));
365 Args.addAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s,
366 options::OPT_t, options::OPT_u_Group});
367 AddLinkerInputs(HTC, Inputs, Args, CmdArgs, JA);
368
369 ToolChain::UnwindLibType UNW = HTC.GetUnwindLibType(Args);
370
371 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
372 if (NeedsSanitizerDeps) {
373 linkSanitizerRuntimeDeps(HTC, Args, CmdArgs);
374
375 if (UNW != ToolChain::UNW_None)
376 CmdArgs.push_back("-lunwind");
377 }
378 if (NeedsXRayDeps)
379 linkXRayRuntimeDeps(HTC, Args, CmdArgs);
380
381 if (!Args.hasArg(options::OPT_nolibc))
382 CmdArgs.push_back("-lc");
383 CmdArgs.push_back("-lclang_rt.builtins-hexagon");
384 }
385 if (D.CCCIsCXX()) {
386 if (HTC.ShouldLinkCXXStdlib(Args))
387 HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
388 }
389 const ToolChain::path_list &LibPaths = HTC.getFilePaths();
390 for (const auto &LibPath : LibPaths)
391 CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
392 Args.ClaimAllArgs(options::OPT_L);
393 return;
394 }
395
396 //----------------------------------------------------------------------------
397 // moslib
398 //----------------------------------------------------------------------------
399 std::vector<std::string> OsLibs;
400 bool HasStandalone = false;
401 for (const Arg *A : Args.filtered(options::OPT_moslib_EQ)) {
402 A->claim();
403 OsLibs.emplace_back(A->getValue());
404 HasStandalone = HasStandalone || (OsLibs.back() == "standalone");
405 }
406 if (OsLibs.empty()) {
407 OsLibs.push_back("standalone");
408 HasStandalone = true;
409 }
410
411 //----------------------------------------------------------------------------
412 // Start Files
413 //----------------------------------------------------------------------------
414 const std::string MCpuSuffix = "/" + CpuVer.str();
415 const std::string MCpuG0Suffix = MCpuSuffix + "/G0";
416 const std::string RootDir =
417 HTC.getHexagonTargetDir(D.Dir, D.PrefixDirs) + "/";
418 const std::string StartSubDir =
419 "hexagon/lib" + (UseG0 ? MCpuG0Suffix : MCpuSuffix);
420
421 auto Find = [&HTC] (const std::string &RootDir, const std::string &SubDir,
422 const char *Name) -> std::string {
423 std::string RelName = SubDir + Name;
424 std::string P = HTC.GetFilePath(RelName.c_str());
425 if (llvm::sys::fs::exists(P))
426 return P;
427 return RootDir + RelName;
428 };
429
430 if (IncStdLib && IncStartFiles) {
431 if (!IsShared) {
432 if (HasStandalone) {
433 std::string Crt0SA = Find(RootDir, StartSubDir, "/crt0_standalone.o");
434 CmdArgs.push_back(Args.MakeArgString(Crt0SA));
435 }
436 std::string Crt0 = Find(RootDir, StartSubDir, "/crt0.o");
437 CmdArgs.push_back(Args.MakeArgString(Crt0));
438 }
439 std::string Init = UseShared
440 ? Find(RootDir, StartSubDir + "/pic", "/initS.o")
441 : Find(RootDir, StartSubDir, "/init.o");
442 CmdArgs.push_back(Args.MakeArgString(Init));
443 }
444
445 //----------------------------------------------------------------------------
446 // Library Search Paths
447 //----------------------------------------------------------------------------
448 const ToolChain::path_list &LibPaths = HTC.getFilePaths();
449 for (const auto &LibPath : LibPaths)
450 CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
451 Args.ClaimAllArgs(options::OPT_L);
452
453 //----------------------------------------------------------------------------
454 //
455 //----------------------------------------------------------------------------
456 Args.addAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s,
457 options::OPT_t, options::OPT_u_Group});
458
459 AddLinkerInputs(HTC, Inputs, Args, CmdArgs, JA);
460
461 //----------------------------------------------------------------------------
462 // Libraries
463 //----------------------------------------------------------------------------
464 if (IncStdLib && IncDefLibs) {
465 if (D.CCCIsCXX()) {
466 if (HTC.ShouldLinkCXXStdlib(Args))
467 HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
468 CmdArgs.push_back("-lm");
469 }
470
471 CmdArgs.push_back("--start-group");
472
473 if (!IsShared) {
474 for (StringRef Lib : OsLibs)
475 CmdArgs.push_back(Args.MakeArgString("-l" + Lib));
476 if (!Args.hasArg(options::OPT_nolibc))
477 CmdArgs.push_back("-lc");
478 }
479 CmdArgs.push_back("-lgcc");
480
481 CmdArgs.push_back("--end-group");
482 }
483
484 //----------------------------------------------------------------------------
485 // End files
486 //----------------------------------------------------------------------------
487 if (IncStdLib && IncStartFiles) {
488 std::string Fini = UseShared
489 ? Find(RootDir, StartSubDir + "/pic", "/finiS.o")
490 : Find(RootDir, StartSubDir, "/fini.o");
491 CmdArgs.push_back(Args.MakeArgString(Fini));
492 }
493 }
494
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const495 void hexagon::Linker::ConstructJob(Compilation &C, const JobAction &JA,
496 const InputInfo &Output,
497 const InputInfoList &Inputs,
498 const ArgList &Args,
499 const char *LinkingOutput) const {
500 auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain());
501
502 ArgStringList CmdArgs;
503 constructHexagonLinkArgs(C, JA, HTC, Output, Inputs, Args, CmdArgs,
504 LinkingOutput);
505
506 const char *Exec = Args.MakeArgString(HTC.GetLinkerPath());
507 C.addCommand(std::make_unique<Command>(JA, *this,
508 ResponseFileSupport::AtFileCurCP(),
509 Exec, CmdArgs, Inputs, Output));
510 }
511 // Hexagon tools end.
512
513 /// Hexagon Toolchain
514
getHexagonTargetDir(const std::string & InstalledDir,const SmallVectorImpl<std::string> & PrefixDirs) const515 std::string HexagonToolChain::getHexagonTargetDir(
516 const std::string &InstalledDir,
517 const SmallVectorImpl<std::string> &PrefixDirs) const {
518 std::string InstallRelDir;
519 const Driver &D = getDriver();
520
521 // Locate the rest of the toolchain ...
522 for (auto &I : PrefixDirs)
523 if (D.getVFS().exists(I))
524 return I;
525
526 if (getVFS().exists(InstallRelDir = InstalledDir + "/../target"))
527 return InstallRelDir;
528
529 return InstalledDir;
530 }
531
532 std::optional<unsigned>
getSmallDataThreshold(const ArgList & Args)533 HexagonToolChain::getSmallDataThreshold(const ArgList &Args) {
534 StringRef Gn = "";
535 if (Arg *A = Args.getLastArg(options::OPT_G)) {
536 Gn = A->getValue();
537 } else if (Args.getLastArg(options::OPT_shared, options::OPT_fpic,
538 options::OPT_fPIC)) {
539 Gn = "0";
540 }
541
542 unsigned G;
543 if (!Gn.getAsInteger(10, G))
544 return G;
545
546 return std::nullopt;
547 }
548
getCompilerRTPath() const549 std::string HexagonToolChain::getCompilerRTPath() const {
550 SmallString<128> Dir(getDriver().SysRoot);
551 llvm::sys::path::append(Dir, "usr", "lib");
552 if (!SelectedMultilibs.empty()) {
553 Dir += SelectedMultilibs.back().gccSuffix();
554 }
555 return std::string(Dir);
556 }
557
getHexagonLibraryPaths(const ArgList & Args,ToolChain::path_list & LibPaths) const558 void HexagonToolChain::getHexagonLibraryPaths(const ArgList &Args,
559 ToolChain::path_list &LibPaths) const {
560 const Driver &D = getDriver();
561
562 //----------------------------------------------------------------------------
563 // -L Args
564 //----------------------------------------------------------------------------
565 for (Arg *A : Args.filtered(options::OPT_L))
566 llvm::append_range(LibPaths, A->getValues());
567
568 //----------------------------------------------------------------------------
569 // Other standard paths
570 //----------------------------------------------------------------------------
571 std::vector<std::string> RootDirs;
572 std::copy(D.PrefixDirs.begin(), D.PrefixDirs.end(),
573 std::back_inserter(RootDirs));
574
575 std::string TargetDir = getHexagonTargetDir(D.Dir, D.PrefixDirs);
576 if (!llvm::is_contained(RootDirs, TargetDir))
577 RootDirs.push_back(TargetDir);
578
579 bool HasPIC = Args.hasArg(options::OPT_fpic, options::OPT_fPIC);
580 // Assume G0 with -shared.
581 bool HasG0 = Args.hasArg(options::OPT_shared);
582 if (auto G = getSmallDataThreshold(Args))
583 HasG0 = *G == 0;
584
585 const std::string CpuVer = GetTargetCPUVersion(Args).str();
586 for (auto &Dir : RootDirs) {
587 std::string LibDir = Dir + "/hexagon/lib";
588 std::string LibDirCpu = LibDir + '/' + CpuVer;
589 if (HasG0) {
590 if (HasPIC)
591 LibPaths.push_back(LibDirCpu + "/G0/pic");
592 LibPaths.push_back(LibDirCpu + "/G0");
593 }
594 LibPaths.push_back(LibDirCpu);
595 LibPaths.push_back(LibDir);
596 }
597 }
598
HexagonToolChain(const Driver & D,const llvm::Triple & Triple,const llvm::opt::ArgList & Args)599 HexagonToolChain::HexagonToolChain(const Driver &D, const llvm::Triple &Triple,
600 const llvm::opt::ArgList &Args)
601 : Linux(D, Triple, Args) {
602 const std::string TargetDir = getHexagonTargetDir(D.Dir, D.PrefixDirs);
603
604 // Note: Generic_GCC::Generic_GCC adds InstalledDir and getDriver().Dir to
605 // program paths
606 const std::string BinDir(TargetDir + "/bin");
607 if (D.getVFS().exists(BinDir))
608 getProgramPaths().push_back(BinDir);
609
610 ToolChain::path_list &LibPaths = getFilePaths();
611
612 // Remove paths added by Linux toolchain. Currently Hexagon_TC really targets
613 // 'elf' OS type, so the Linux paths are not appropriate. When we actually
614 // support 'linux' we'll need to fix this up
615 LibPaths.clear();
616 getHexagonLibraryPaths(Args, LibPaths);
617 }
618
~HexagonToolChain()619 HexagonToolChain::~HexagonToolChain() {}
620
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const621 void HexagonToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
622 ArgStringList &CmdArgs) const {
623 CXXStdlibType Type = GetCXXStdlibType(Args);
624 ToolChain::UnwindLibType UNW = GetUnwindLibType(Args);
625 if (UNW != ToolChain::UNW_None && UNW != ToolChain::UNW_CompilerRT) {
626 const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
627 if (A) {
628 getDriver().Diag(diag::err_drv_unsupported_unwind_for_platform)
629 << A->getValue() << getTriple().normalize();
630 return;
631 }
632 }
633
634 switch (Type) {
635 case ToolChain::CST_Libcxx:
636 CmdArgs.push_back("-lc++");
637 if (Args.hasArg(options::OPT_fexperimental_library))
638 CmdArgs.push_back("-lc++experimental");
639 CmdArgs.push_back("-lc++abi");
640 if (UNW != ToolChain::UNW_None)
641 CmdArgs.push_back("-lunwind");
642 break;
643
644 case ToolChain::CST_Libstdcxx:
645 CmdArgs.push_back("-lstdc++");
646 break;
647 }
648 }
649
buildAssembler() const650 Tool *HexagonToolChain::buildAssembler() const {
651 return new tools::hexagon::Assembler(*this);
652 }
653
buildLinker() const654 Tool *HexagonToolChain::buildLinker() const {
655 return new tools::hexagon::Linker(*this);
656 }
657
getOptimizationLevel(const llvm::opt::ArgList & DriverArgs) const658 unsigned HexagonToolChain::getOptimizationLevel(
659 const llvm::opt::ArgList &DriverArgs) const {
660 // Copied in large part from lib/Frontend/CompilerInvocation.cpp.
661 Arg *A = DriverArgs.getLastArg(options::OPT_O_Group);
662 if (!A)
663 return 0;
664
665 if (A->getOption().matches(options::OPT_O0))
666 return 0;
667 if (A->getOption().matches(options::OPT_Ofast) ||
668 A->getOption().matches(options::OPT_O4))
669 return 3;
670 assert(A->getNumValues() != 0);
671 StringRef S(A->getValue());
672 if (S == "s" || S == "z" || S.empty())
673 return 2;
674 if (S == "g")
675 return 1;
676
677 unsigned OptLevel;
678 if (S.getAsInteger(10, OptLevel))
679 return 0;
680 return OptLevel;
681 }
682
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const683 void HexagonToolChain::addClangTargetOptions(const ArgList &DriverArgs,
684 ArgStringList &CC1Args,
685 Action::OffloadKind) const {
686
687 bool UseInitArrayDefault = getTriple().isMusl();
688
689 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
690 options::OPT_fno_use_init_array,
691 UseInitArrayDefault))
692 CC1Args.push_back("-fno-use-init-array");
693
694 if (DriverArgs.hasArg(options::OPT_ffixed_r19)) {
695 CC1Args.push_back("-target-feature");
696 CC1Args.push_back("+reserved-r19");
697 }
698 if (isAutoHVXEnabled(DriverArgs)) {
699 CC1Args.push_back("-mllvm");
700 CC1Args.push_back("-hexagon-autohvx");
701 }
702 }
703
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const704 void HexagonToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
705 ArgStringList &CC1Args) const {
706 if (DriverArgs.hasArg(options::OPT_nostdinc))
707 return;
708
709 const bool IsELF = !getTriple().isMusl() && !getTriple().isOSLinux();
710 const bool IsLinuxMusl = getTriple().isMusl() && getTriple().isOSLinux();
711
712 const Driver &D = getDriver();
713 SmallString<128> ResourceDirInclude(D.ResourceDir);
714 if (!IsELF) {
715 llvm::sys::path::append(ResourceDirInclude, "include");
716 if (!DriverArgs.hasArg(options::OPT_nobuiltininc) &&
717 (!IsLinuxMusl || DriverArgs.hasArg(options::OPT_nostdlibinc)))
718 addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
719 }
720 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
721 return;
722
723 const bool HasSysRoot = !D.SysRoot.empty();
724 if (HasSysRoot) {
725 SmallString<128> P(D.SysRoot);
726 if (IsLinuxMusl)
727 llvm::sys::path::append(P, "usr/include");
728 else
729 llvm::sys::path::append(P, "include");
730
731 addExternCSystemInclude(DriverArgs, CC1Args, P.str());
732 // LOCAL_INCLUDE_DIR
733 addSystemInclude(DriverArgs, CC1Args, P + "/usr/local/include");
734 // TOOL_INCLUDE_DIR
735 AddMultilibIncludeArgs(DriverArgs, CC1Args);
736 }
737
738 if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && IsLinuxMusl)
739 addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
740
741 if (HasSysRoot)
742 return;
743 std::string TargetDir = getHexagonTargetDir(D.Dir, D.PrefixDirs);
744 addExternCSystemInclude(DriverArgs, CC1Args, TargetDir + "/hexagon/include");
745 }
746
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const747 void HexagonToolChain::addLibCxxIncludePaths(
748 const llvm::opt::ArgList &DriverArgs,
749 llvm::opt::ArgStringList &CC1Args) const {
750 const Driver &D = getDriver();
751 if (!D.SysRoot.empty() && getTriple().isMusl())
752 addLibStdCXXIncludePaths(D.SysRoot + "/usr/include/c++/v1", "", "",
753 DriverArgs, CC1Args);
754 else if (getTriple().isMusl())
755 addLibStdCXXIncludePaths("/usr/include/c++/v1", "", "", DriverArgs,
756 CC1Args);
757 else {
758 std::string TargetDir = getHexagonTargetDir(D.Dir, D.PrefixDirs);
759 addLibStdCXXIncludePaths(TargetDir + "/hexagon/include/c++/v1", "", "",
760 DriverArgs, CC1Args);
761 }
762 }
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const763 void HexagonToolChain::addLibStdCxxIncludePaths(
764 const llvm::opt::ArgList &DriverArgs,
765 llvm::opt::ArgStringList &CC1Args) const {
766 const Driver &D = getDriver();
767 std::string TargetDir = getHexagonTargetDir(D.Dir, D.PrefixDirs);
768 addLibStdCXXIncludePaths(TargetDir + "/hexagon/include/c++", "", "",
769 DriverArgs, CC1Args);
770 }
771
772 ToolChain::CXXStdlibType
GetCXXStdlibType(const ArgList & Args) const773 HexagonToolChain::GetCXXStdlibType(const ArgList &Args) const {
774 Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
775 if (!A) {
776 if (getTriple().isMusl())
777 return ToolChain::CST_Libcxx;
778 else
779 return ToolChain::CST_Libstdcxx;
780 }
781 StringRef Value = A->getValue();
782 if (Value != "libstdc++" && Value != "libc++")
783 getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
784
785 if (Value == "libstdc++")
786 return ToolChain::CST_Libstdcxx;
787 else if (Value == "libc++")
788 return ToolChain::CST_Libcxx;
789 else
790 return ToolChain::CST_Libstdcxx;
791 }
792
isAutoHVXEnabled(const llvm::opt::ArgList & Args)793 bool HexagonToolChain::isAutoHVXEnabled(const llvm::opt::ArgList &Args) {
794 if (Arg *A = Args.getLastArg(options::OPT_fvectorize,
795 options::OPT_fno_vectorize))
796 return A->getOption().matches(options::OPT_fvectorize);
797 return false;
798 }
799
800 //
801 // Returns the default CPU for Hexagon. This is the default compilation target
802 // if no Hexagon processor is selected at the command-line.
803 //
GetDefaultCPU()804 StringRef HexagonToolChain::GetDefaultCPU() { return "hexagonv68"; }
805
GetTargetCPUVersion(const ArgList & Args)806 StringRef HexagonToolChain::GetTargetCPUVersion(const ArgList &Args) {
807 Arg *CpuArg = nullptr;
808 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
809 CpuArg = A;
810
811 StringRef CPU = CpuArg ? CpuArg->getValue() : GetDefaultCPU();
812 CPU.consume_front("hexagon");
813 return CPU;
814 }
815