1 //===--- TargetInfo.cpp - Information about Target machine ----------------===//
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 // This file implements the TargetInfo interface.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/Basic/TargetInfo.h"
14 #include "clang/Basic/AddressSpaces.h"
15 #include "clang/Basic/CharInfo.h"
16 #include "clang/Basic/Diagnostic.h"
17 #include "clang/Basic/DiagnosticFrontend.h"
18 #include "clang/Basic/LangOptions.h"
19 #include "llvm/ADT/APFloat.h"
20 #include "llvm/ADT/STLExtras.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/TargetParser/TargetParser.h"
23 #include <cstdlib>
24 using namespace clang;
25
26 static const LangASMap DefaultAddrSpaceMap = {0};
27 // The fake address space map must have a distinct entry for each
28 // language-specific address space.
29 static const LangASMap FakeAddrSpaceMap = {
30 0, // Default
31 1, // opencl_global
32 3, // opencl_local
33 2, // opencl_constant
34 0, // opencl_private
35 4, // opencl_generic
36 5, // opencl_global_device
37 6, // opencl_global_host
38 7, // cuda_device
39 8, // cuda_constant
40 9, // cuda_shared
41 1, // sycl_global
42 5, // sycl_global_device
43 6, // sycl_global_host
44 3, // sycl_local
45 0, // sycl_private
46 10, // ptr32_sptr
47 11, // ptr32_uptr
48 12, // ptr64
49 13, // hlsl_groupshared
50 20, // wasm_funcref
51 };
52
53 // TargetInfo Constructor.
TargetInfo(const llvm::Triple & T)54 TargetInfo::TargetInfo(const llvm::Triple &T) : Triple(T) {
55 // Set defaults. Defaults are set for a 32-bit RISC platform, like PPC or
56 // SPARC. These should be overridden by concrete targets as needed.
57 BigEndian = !T.isLittleEndian();
58 TLSSupported = true;
59 VLASupported = true;
60 NoAsmVariants = false;
61 HasLegalHalfType = false;
62 HalfArgsAndReturns = false;
63 HasFloat128 = false;
64 HasIbm128 = false;
65 HasFloat16 = false;
66 HasBFloat16 = false;
67 HasFullBFloat16 = false;
68 HasLongDouble = true;
69 HasFPReturn = true;
70 HasStrictFP = false;
71 PointerWidth = PointerAlign = 32;
72 BoolWidth = BoolAlign = 8;
73 IntWidth = IntAlign = 32;
74 LongWidth = LongAlign = 32;
75 LongLongWidth = LongLongAlign = 64;
76 Int128Align = 128;
77
78 // Fixed point default bit widths
79 ShortAccumWidth = ShortAccumAlign = 16;
80 AccumWidth = AccumAlign = 32;
81 LongAccumWidth = LongAccumAlign = 64;
82 ShortFractWidth = ShortFractAlign = 8;
83 FractWidth = FractAlign = 16;
84 LongFractWidth = LongFractAlign = 32;
85
86 // Fixed point default integral and fractional bit sizes
87 // We give the _Accum 1 fewer fractional bits than their corresponding _Fract
88 // types by default to have the same number of fractional bits between _Accum
89 // and _Fract types.
90 PaddingOnUnsignedFixedPoint = false;
91 ShortAccumScale = 7;
92 AccumScale = 15;
93 LongAccumScale = 31;
94
95 SuitableAlign = 64;
96 DefaultAlignForAttributeAligned = 128;
97 MinGlobalAlign = 0;
98 // From the glibc documentation, on GNU systems, malloc guarantees 16-byte
99 // alignment on 64-bit systems and 8-byte alignment on 32-bit systems. See
100 // https://www.gnu.org/software/libc/manual/html_node/Malloc-Examples.html.
101 // This alignment guarantee also applies to Windows and Android. On Darwin
102 // and OpenBSD, the alignment is 16 bytes on both 64-bit and 32-bit systems.
103 if (T.isGNUEnvironment() || T.isWindowsMSVCEnvironment() || T.isAndroid() ||
104 T.isOHOSFamily())
105 NewAlign = Triple.isArch64Bit() ? 128 : Triple.isArch32Bit() ? 64 : 0;
106 else if (T.isOSDarwin() || T.isOSOpenBSD())
107 NewAlign = 128;
108 else
109 NewAlign = 0; // Infer from basic type alignment.
110 HalfWidth = 16;
111 HalfAlign = 16;
112 FloatWidth = 32;
113 FloatAlign = 32;
114 DoubleWidth = 64;
115 DoubleAlign = 64;
116 LongDoubleWidth = 64;
117 LongDoubleAlign = 64;
118 Float128Align = 128;
119 Ibm128Align = 128;
120 LargeArrayMinWidth = 0;
121 LargeArrayAlign = 0;
122 MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 0;
123 MaxVectorAlign = 0;
124 MaxTLSAlign = 0;
125 SizeType = UnsignedLong;
126 PtrDiffType = SignedLong;
127 IntMaxType = SignedLongLong;
128 IntPtrType = SignedLong;
129 WCharType = SignedInt;
130 WIntType = SignedInt;
131 Char16Type = UnsignedShort;
132 Char32Type = UnsignedInt;
133 Int64Type = SignedLongLong;
134 Int16Type = SignedShort;
135 SigAtomicType = SignedInt;
136 ProcessIDType = SignedInt;
137 UseSignedCharForObjCBool = true;
138 UseBitFieldTypeAlignment = true;
139 UseZeroLengthBitfieldAlignment = false;
140 UseLeadingZeroLengthBitfield = true;
141 UseExplicitBitFieldAlignment = true;
142 ZeroLengthBitfieldBoundary = 0;
143 MaxAlignedAttribute = 0;
144 HalfFormat = &llvm::APFloat::IEEEhalf();
145 FloatFormat = &llvm::APFloat::IEEEsingle();
146 DoubleFormat = &llvm::APFloat::IEEEdouble();
147 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
148 Float128Format = &llvm::APFloat::IEEEquad();
149 Ibm128Format = &llvm::APFloat::PPCDoubleDouble();
150 MCountName = "mcount";
151 UserLabelPrefix = "_";
152 RegParmMax = 0;
153 SSERegParmMax = 0;
154 HasAlignMac68kSupport = false;
155 HasBuiltinMSVaList = false;
156 IsRenderScriptTarget = false;
157 HasAArch64SVETypes = false;
158 HasRISCVVTypes = false;
159 AllowAMDGPUUnsafeFPAtomics = false;
160 HasUnalignedAccess = false;
161 ARMCDECoprocMask = 0;
162
163 // Default to no types using fpret.
164 RealTypeUsesObjCFPRetMask = 0;
165
166 // Default to not using fp2ret for __Complex long double
167 ComplexLongDoubleUsesFP2Ret = false;
168
169 // Set the C++ ABI based on the triple.
170 TheCXXABI.set(Triple.isKnownWindowsMSVCEnvironment()
171 ? TargetCXXABI::Microsoft
172 : TargetCXXABI::GenericItanium);
173
174 // Default to an empty address space map.
175 AddrSpaceMap = &DefaultAddrSpaceMap;
176 UseAddrSpaceMapMangling = false;
177
178 // Default to an unknown platform name.
179 PlatformName = "unknown";
180 PlatformMinVersion = VersionTuple();
181
182 MaxOpenCLWorkGroupSize = 1024;
183
184 MaxBitIntWidth.reset();
185 }
186
187 // Out of line virtual dtor for TargetInfo.
~TargetInfo()188 TargetInfo::~TargetInfo() {}
189
resetDataLayout(StringRef DL,const char * ULP)190 void TargetInfo::resetDataLayout(StringRef DL, const char *ULP) {
191 DataLayoutString = DL.str();
192 UserLabelPrefix = ULP;
193 }
194
195 bool
checkCFProtectionBranchSupported(DiagnosticsEngine & Diags) const196 TargetInfo::checkCFProtectionBranchSupported(DiagnosticsEngine &Diags) const {
197 Diags.Report(diag::err_opt_not_valid_on_target) << "cf-protection=branch";
198 return false;
199 }
200
201 bool
checkCFProtectionReturnSupported(DiagnosticsEngine & Diags) const202 TargetInfo::checkCFProtectionReturnSupported(DiagnosticsEngine &Diags) const {
203 Diags.Report(diag::err_opt_not_valid_on_target) << "cf-protection=return";
204 return false;
205 }
206
207 /// getTypeName - Return the user string for the specified integer type enum.
208 /// For example, SignedShort -> "short".
getTypeName(IntType T)209 const char *TargetInfo::getTypeName(IntType T) {
210 switch (T) {
211 default: llvm_unreachable("not an integer!");
212 case SignedChar: return "signed char";
213 case UnsignedChar: return "unsigned char";
214 case SignedShort: return "short";
215 case UnsignedShort: return "unsigned short";
216 case SignedInt: return "int";
217 case UnsignedInt: return "unsigned int";
218 case SignedLong: return "long int";
219 case UnsignedLong: return "long unsigned int";
220 case SignedLongLong: return "long long int";
221 case UnsignedLongLong: return "long long unsigned int";
222 }
223 }
224
225 /// getTypeConstantSuffix - Return the constant suffix for the specified
226 /// integer type enum. For example, SignedLong -> "L".
getTypeConstantSuffix(IntType T) const227 const char *TargetInfo::getTypeConstantSuffix(IntType T) const {
228 switch (T) {
229 default: llvm_unreachable("not an integer!");
230 case SignedChar:
231 case SignedShort:
232 case SignedInt: return "";
233 case SignedLong: return "L";
234 case SignedLongLong: return "LL";
235 case UnsignedChar:
236 if (getCharWidth() < getIntWidth())
237 return "";
238 [[fallthrough]];
239 case UnsignedShort:
240 if (getShortWidth() < getIntWidth())
241 return "";
242 [[fallthrough]];
243 case UnsignedInt: return "U";
244 case UnsignedLong: return "UL";
245 case UnsignedLongLong: return "ULL";
246 }
247 }
248
249 /// getTypeFormatModifier - Return the printf format modifier for the
250 /// specified integer type enum. For example, SignedLong -> "l".
251
getTypeFormatModifier(IntType T)252 const char *TargetInfo::getTypeFormatModifier(IntType T) {
253 switch (T) {
254 default: llvm_unreachable("not an integer!");
255 case SignedChar:
256 case UnsignedChar: return "hh";
257 case SignedShort:
258 case UnsignedShort: return "h";
259 case SignedInt:
260 case UnsignedInt: return "";
261 case SignedLong:
262 case UnsignedLong: return "l";
263 case SignedLongLong:
264 case UnsignedLongLong: return "ll";
265 }
266 }
267
268 /// getTypeWidth - Return the width (in bits) of the specified integer type
269 /// enum. For example, SignedInt -> getIntWidth().
getTypeWidth(IntType T) const270 unsigned TargetInfo::getTypeWidth(IntType T) const {
271 switch (T) {
272 default: llvm_unreachable("not an integer!");
273 case SignedChar:
274 case UnsignedChar: return getCharWidth();
275 case SignedShort:
276 case UnsignedShort: return getShortWidth();
277 case SignedInt:
278 case UnsignedInt: return getIntWidth();
279 case SignedLong:
280 case UnsignedLong: return getLongWidth();
281 case SignedLongLong:
282 case UnsignedLongLong: return getLongLongWidth();
283 };
284 }
285
getIntTypeByWidth(unsigned BitWidth,bool IsSigned) const286 TargetInfo::IntType TargetInfo::getIntTypeByWidth(
287 unsigned BitWidth, bool IsSigned) const {
288 if (getCharWidth() == BitWidth)
289 return IsSigned ? SignedChar : UnsignedChar;
290 if (getShortWidth() == BitWidth)
291 return IsSigned ? SignedShort : UnsignedShort;
292 if (getIntWidth() == BitWidth)
293 return IsSigned ? SignedInt : UnsignedInt;
294 if (getLongWidth() == BitWidth)
295 return IsSigned ? SignedLong : UnsignedLong;
296 if (getLongLongWidth() == BitWidth)
297 return IsSigned ? SignedLongLong : UnsignedLongLong;
298 return NoInt;
299 }
300
getLeastIntTypeByWidth(unsigned BitWidth,bool IsSigned) const301 TargetInfo::IntType TargetInfo::getLeastIntTypeByWidth(unsigned BitWidth,
302 bool IsSigned) const {
303 if (getCharWidth() >= BitWidth)
304 return IsSigned ? SignedChar : UnsignedChar;
305 if (getShortWidth() >= BitWidth)
306 return IsSigned ? SignedShort : UnsignedShort;
307 if (getIntWidth() >= BitWidth)
308 return IsSigned ? SignedInt : UnsignedInt;
309 if (getLongWidth() >= BitWidth)
310 return IsSigned ? SignedLong : UnsignedLong;
311 if (getLongLongWidth() >= BitWidth)
312 return IsSigned ? SignedLongLong : UnsignedLongLong;
313 return NoInt;
314 }
315
getRealTypeByWidth(unsigned BitWidth,FloatModeKind ExplicitType) const316 FloatModeKind TargetInfo::getRealTypeByWidth(unsigned BitWidth,
317 FloatModeKind ExplicitType) const {
318 if (getHalfWidth() == BitWidth)
319 return FloatModeKind::Half;
320 if (getFloatWidth() == BitWidth)
321 return FloatModeKind::Float;
322 if (getDoubleWidth() == BitWidth)
323 return FloatModeKind::Double;
324
325 switch (BitWidth) {
326 case 96:
327 if (&getLongDoubleFormat() == &llvm::APFloat::x87DoubleExtended())
328 return FloatModeKind::LongDouble;
329 break;
330 case 128:
331 // The caller explicitly asked for an IEEE compliant type but we still
332 // have to check if the target supports it.
333 if (ExplicitType == FloatModeKind::Float128)
334 return hasFloat128Type() ? FloatModeKind::Float128
335 : FloatModeKind::NoFloat;
336 if (ExplicitType == FloatModeKind::Ibm128)
337 return hasIbm128Type() ? FloatModeKind::Ibm128
338 : FloatModeKind::NoFloat;
339 if (&getLongDoubleFormat() == &llvm::APFloat::PPCDoubleDouble() ||
340 &getLongDoubleFormat() == &llvm::APFloat::IEEEquad())
341 return FloatModeKind::LongDouble;
342 if (hasFloat128Type())
343 return FloatModeKind::Float128;
344 break;
345 }
346
347 return FloatModeKind::NoFloat;
348 }
349
350 /// getTypeAlign - Return the alignment (in bits) of the specified integer type
351 /// enum. For example, SignedInt -> getIntAlign().
getTypeAlign(IntType T) const352 unsigned TargetInfo::getTypeAlign(IntType T) const {
353 switch (T) {
354 default: llvm_unreachable("not an integer!");
355 case SignedChar:
356 case UnsignedChar: return getCharAlign();
357 case SignedShort:
358 case UnsignedShort: return getShortAlign();
359 case SignedInt:
360 case UnsignedInt: return getIntAlign();
361 case SignedLong:
362 case UnsignedLong: return getLongAlign();
363 case SignedLongLong:
364 case UnsignedLongLong: return getLongLongAlign();
365 };
366 }
367
368 /// isTypeSigned - Return whether an integer types is signed. Returns true if
369 /// the type is signed; false otherwise.
isTypeSigned(IntType T)370 bool TargetInfo::isTypeSigned(IntType T) {
371 switch (T) {
372 default: llvm_unreachable("not an integer!");
373 case SignedChar:
374 case SignedShort:
375 case SignedInt:
376 case SignedLong:
377 case SignedLongLong:
378 return true;
379 case UnsignedChar:
380 case UnsignedShort:
381 case UnsignedInt:
382 case UnsignedLong:
383 case UnsignedLongLong:
384 return false;
385 };
386 }
387
388 /// adjust - Set forced language options.
389 /// Apply changes to the target information with respect to certain
390 /// language options which change the target configuration and adjust
391 /// the language based on the target options where applicable.
adjust(DiagnosticsEngine & Diags,LangOptions & Opts)392 void TargetInfo::adjust(DiagnosticsEngine &Diags, LangOptions &Opts) {
393 if (Opts.NoBitFieldTypeAlign)
394 UseBitFieldTypeAlignment = false;
395
396 switch (Opts.WCharSize) {
397 default: llvm_unreachable("invalid wchar_t width");
398 case 0: break;
399 case 1: WCharType = Opts.WCharIsSigned ? SignedChar : UnsignedChar; break;
400 case 2: WCharType = Opts.WCharIsSigned ? SignedShort : UnsignedShort; break;
401 case 4: WCharType = Opts.WCharIsSigned ? SignedInt : UnsignedInt; break;
402 }
403
404 if (Opts.AlignDouble) {
405 DoubleAlign = LongLongAlign = 64;
406 LongDoubleAlign = 64;
407 }
408
409 // HLSL explicitly defines the sizes and formats of some data types, and we
410 // need to conform to those regardless of what architecture you are targeting.
411 if (Opts.HLSL) {
412 LongWidth = LongAlign = 64;
413 if (!Opts.NativeHalfType) {
414 HalfFormat = &llvm::APFloat::IEEEsingle();
415 HalfWidth = HalfAlign = 32;
416 }
417 }
418
419 if (Opts.OpenCL) {
420 // OpenCL C requires specific widths for types, irrespective of
421 // what these normally are for the target.
422 // We also define long long and long double here, although the
423 // OpenCL standard only mentions these as "reserved".
424 IntWidth = IntAlign = 32;
425 LongWidth = LongAlign = 64;
426 LongLongWidth = LongLongAlign = 128;
427 HalfWidth = HalfAlign = 16;
428 FloatWidth = FloatAlign = 32;
429
430 // Embedded 32-bit targets (OpenCL EP) might have double C type
431 // defined as float. Let's not override this as it might lead
432 // to generating illegal code that uses 64bit doubles.
433 if (DoubleWidth != FloatWidth) {
434 DoubleWidth = DoubleAlign = 64;
435 DoubleFormat = &llvm::APFloat::IEEEdouble();
436 }
437 LongDoubleWidth = LongDoubleAlign = 128;
438
439 unsigned MaxPointerWidth = getMaxPointerWidth();
440 assert(MaxPointerWidth == 32 || MaxPointerWidth == 64);
441 bool Is32BitArch = MaxPointerWidth == 32;
442 SizeType = Is32BitArch ? UnsignedInt : UnsignedLong;
443 PtrDiffType = Is32BitArch ? SignedInt : SignedLong;
444 IntPtrType = Is32BitArch ? SignedInt : SignedLong;
445
446 IntMaxType = SignedLongLong;
447 Int64Type = SignedLong;
448
449 HalfFormat = &llvm::APFloat::IEEEhalf();
450 FloatFormat = &llvm::APFloat::IEEEsingle();
451 LongDoubleFormat = &llvm::APFloat::IEEEquad();
452
453 // OpenCL C v3.0 s6.7.5 - The generic address space requires support for
454 // OpenCL C 2.0 or OpenCL C 3.0 with the __opencl_c_generic_address_space
455 // feature
456 // OpenCL C v3.0 s6.2.1 - OpenCL pipes require support of OpenCL C 2.0
457 // or later and __opencl_c_pipes feature
458 // FIXME: These language options are also defined in setLangDefaults()
459 // for OpenCL C 2.0 but with no access to target capabilities. Target
460 // should be immutable once created and thus these language options need
461 // to be defined only once.
462 if (Opts.getOpenCLCompatibleVersion() == 300) {
463 const auto &OpenCLFeaturesMap = getSupportedOpenCLOpts();
464 Opts.OpenCLGenericAddressSpace = hasFeatureEnabled(
465 OpenCLFeaturesMap, "__opencl_c_generic_address_space");
466 Opts.OpenCLPipes =
467 hasFeatureEnabled(OpenCLFeaturesMap, "__opencl_c_pipes");
468 Opts.Blocks =
469 hasFeatureEnabled(OpenCLFeaturesMap, "__opencl_c_device_enqueue");
470 }
471 }
472
473 if (Opts.DoubleSize) {
474 if (Opts.DoubleSize == 32) {
475 DoubleWidth = 32;
476 LongDoubleWidth = 32;
477 DoubleFormat = &llvm::APFloat::IEEEsingle();
478 LongDoubleFormat = &llvm::APFloat::IEEEsingle();
479 } else if (Opts.DoubleSize == 64) {
480 DoubleWidth = 64;
481 LongDoubleWidth = 64;
482 DoubleFormat = &llvm::APFloat::IEEEdouble();
483 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
484 }
485 }
486
487 if (Opts.LongDoubleSize) {
488 if (Opts.LongDoubleSize == DoubleWidth) {
489 LongDoubleWidth = DoubleWidth;
490 LongDoubleAlign = DoubleAlign;
491 LongDoubleFormat = DoubleFormat;
492 } else if (Opts.LongDoubleSize == 128) {
493 LongDoubleWidth = LongDoubleAlign = 128;
494 LongDoubleFormat = &llvm::APFloat::IEEEquad();
495 } else if (Opts.LongDoubleSize == 80) {
496 LongDoubleFormat = &llvm::APFloat::x87DoubleExtended();
497 if (getTriple().isWindowsMSVCEnvironment()) {
498 LongDoubleWidth = 128;
499 LongDoubleAlign = 128;
500 } else { // Linux
501 if (getTriple().getArch() == llvm::Triple::x86) {
502 LongDoubleWidth = 96;
503 LongDoubleAlign = 32;
504 } else {
505 LongDoubleWidth = 128;
506 LongDoubleAlign = 128;
507 }
508 }
509 }
510 }
511
512 if (Opts.NewAlignOverride)
513 NewAlign = Opts.NewAlignOverride * getCharWidth();
514
515 // Each unsigned fixed point type has the same number of fractional bits as
516 // its corresponding signed type.
517 PaddingOnUnsignedFixedPoint |= Opts.PaddingOnUnsignedFixedPoint;
518 CheckFixedPointBits();
519
520 if (Opts.ProtectParens && !checkArithmeticFenceSupported()) {
521 Diags.Report(diag::err_opt_not_valid_on_target) << "-fprotect-parens";
522 Opts.ProtectParens = false;
523 }
524
525 if (Opts.MaxBitIntWidth)
526 MaxBitIntWidth = static_cast<unsigned>(Opts.MaxBitIntWidth);
527
528 if (Opts.FakeAddressSpaceMap)
529 AddrSpaceMap = &FakeAddrSpaceMap;
530 }
531
initFeatureMap(llvm::StringMap<bool> & Features,DiagnosticsEngine & Diags,StringRef CPU,const std::vector<std::string> & FeatureVec) const532 bool TargetInfo::initFeatureMap(
533 llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU,
534 const std::vector<std::string> &FeatureVec) const {
535 for (const auto &F : FeatureVec) {
536 StringRef Name = F;
537 if (Name.empty())
538 continue;
539 // Apply the feature via the target.
540 if (Name[0] != '+' && Name[0] != '-')
541 Diags.Report(diag::warn_fe_backend_invalid_feature_flag) << Name;
542 else
543 setFeatureEnabled(Features, Name.substr(1), Name[0] == '+');
544 }
545 return true;
546 }
547
parseTargetAttr(StringRef Features) const548 ParsedTargetAttr TargetInfo::parseTargetAttr(StringRef Features) const {
549 ParsedTargetAttr Ret;
550 if (Features == "default")
551 return Ret;
552 SmallVector<StringRef, 1> AttrFeatures;
553 Features.split(AttrFeatures, ",");
554
555 // Grab the various features and prepend a "+" to turn on the feature to
556 // the backend and add them to our existing set of features.
557 for (auto &Feature : AttrFeatures) {
558 // Go ahead and trim whitespace rather than either erroring or
559 // accepting it weirdly.
560 Feature = Feature.trim();
561
562 // TODO: Support the fpmath option. It will require checking
563 // overall feature validity for the function with the rest of the
564 // attributes on the function.
565 if (Feature.starts_with("fpmath="))
566 continue;
567
568 if (Feature.starts_with("branch-protection=")) {
569 Ret.BranchProtection = Feature.split('=').second.trim();
570 continue;
571 }
572
573 // While we're here iterating check for a different target cpu.
574 if (Feature.starts_with("arch=")) {
575 if (!Ret.CPU.empty())
576 Ret.Duplicate = "arch=";
577 else
578 Ret.CPU = Feature.split("=").second.trim();
579 } else if (Feature.starts_with("tune=")) {
580 if (!Ret.Tune.empty())
581 Ret.Duplicate = "tune=";
582 else
583 Ret.Tune = Feature.split("=").second.trim();
584 } else if (Feature.starts_with("no-"))
585 Ret.Features.push_back("-" + Feature.split("-").second.str());
586 else
587 Ret.Features.push_back("+" + Feature.str());
588 }
589 return Ret;
590 }
591
592 TargetInfo::CallingConvKind
getCallingConvKind(bool ClangABICompat4) const593 TargetInfo::getCallingConvKind(bool ClangABICompat4) const {
594 if (getCXXABI() != TargetCXXABI::Microsoft &&
595 (ClangABICompat4 || getTriple().isPS4()))
596 return CCK_ClangABI4OrPS4;
597 return CCK_Default;
598 }
599
areDefaultedSMFStillPOD(const LangOptions & LangOpts) const600 bool TargetInfo::areDefaultedSMFStillPOD(const LangOptions &LangOpts) const {
601 return LangOpts.getClangABICompat() > LangOptions::ClangABI::Ver15;
602 }
603
getOpenCLTypeAddrSpace(OpenCLTypeKind TK) const604 LangAS TargetInfo::getOpenCLTypeAddrSpace(OpenCLTypeKind TK) const {
605 switch (TK) {
606 case OCLTK_Image:
607 case OCLTK_Pipe:
608 return LangAS::opencl_global;
609
610 case OCLTK_Sampler:
611 return LangAS::opencl_constant;
612
613 default:
614 return LangAS::Default;
615 }
616 }
617
618 //===----------------------------------------------------------------------===//
619
620
removeGCCRegisterPrefix(StringRef Name)621 static StringRef removeGCCRegisterPrefix(StringRef Name) {
622 if (Name[0] == '%' || Name[0] == '#')
623 Name = Name.substr(1);
624
625 return Name;
626 }
627
628 /// isValidClobber - Returns whether the passed in string is
629 /// a valid clobber in an inline asm statement. This is used by
630 /// Sema.
isValidClobber(StringRef Name) const631 bool TargetInfo::isValidClobber(StringRef Name) const {
632 return (isValidGCCRegisterName(Name) || Name == "memory" || Name == "cc" ||
633 Name == "unwind");
634 }
635
636 /// isValidGCCRegisterName - Returns whether the passed in string
637 /// is a valid register name according to GCC. This is used by Sema for
638 /// inline asm statements.
isValidGCCRegisterName(StringRef Name) const639 bool TargetInfo::isValidGCCRegisterName(StringRef Name) const {
640 if (Name.empty())
641 return false;
642
643 // Get rid of any register prefix.
644 Name = removeGCCRegisterPrefix(Name);
645 if (Name.empty())
646 return false;
647
648 ArrayRef<const char *> Names = getGCCRegNames();
649
650 // If we have a number it maps to an entry in the register name array.
651 if (isDigit(Name[0])) {
652 unsigned n;
653 if (!Name.getAsInteger(0, n))
654 return n < Names.size();
655 }
656
657 // Check register names.
658 if (llvm::is_contained(Names, Name))
659 return true;
660
661 // Check any additional names that we have.
662 for (const AddlRegName &ARN : getGCCAddlRegNames())
663 for (const char *AN : ARN.Names) {
664 if (!AN)
665 break;
666 // Make sure the register that the additional name is for is within
667 // the bounds of the register names from above.
668 if (AN == Name && ARN.RegNum < Names.size())
669 return true;
670 }
671
672 // Now check aliases.
673 for (const GCCRegAlias &GRA : getGCCRegAliases())
674 for (const char *A : GRA.Aliases) {
675 if (!A)
676 break;
677 if (A == Name)
678 return true;
679 }
680
681 return false;
682 }
683
getNormalizedGCCRegisterName(StringRef Name,bool ReturnCanonical) const684 StringRef TargetInfo::getNormalizedGCCRegisterName(StringRef Name,
685 bool ReturnCanonical) const {
686 assert(isValidGCCRegisterName(Name) && "Invalid register passed in");
687
688 // Get rid of any register prefix.
689 Name = removeGCCRegisterPrefix(Name);
690
691 ArrayRef<const char *> Names = getGCCRegNames();
692
693 // First, check if we have a number.
694 if (isDigit(Name[0])) {
695 unsigned n;
696 if (!Name.getAsInteger(0, n)) {
697 assert(n < Names.size() && "Out of bounds register number!");
698 return Names[n];
699 }
700 }
701
702 // Check any additional names that we have.
703 for (const AddlRegName &ARN : getGCCAddlRegNames())
704 for (const char *AN : ARN.Names) {
705 if (!AN)
706 break;
707 // Make sure the register that the additional name is for is within
708 // the bounds of the register names from above.
709 if (AN == Name && ARN.RegNum < Names.size())
710 return ReturnCanonical ? Names[ARN.RegNum] : Name;
711 }
712
713 // Now check aliases.
714 for (const GCCRegAlias &RA : getGCCRegAliases())
715 for (const char *A : RA.Aliases) {
716 if (!A)
717 break;
718 if (A == Name)
719 return RA.Register;
720 }
721
722 return Name;
723 }
724
validateOutputConstraint(ConstraintInfo & Info) const725 bool TargetInfo::validateOutputConstraint(ConstraintInfo &Info) const {
726 const char *Name = Info.getConstraintStr().c_str();
727 // An output constraint must start with '=' or '+'
728 if (*Name != '=' && *Name != '+')
729 return false;
730
731 if (*Name == '+')
732 Info.setIsReadWrite();
733
734 Name++;
735 while (*Name) {
736 switch (*Name) {
737 default:
738 if (!validateAsmConstraint(Name, Info)) {
739 // FIXME: We temporarily return false
740 // so we can add more constraints as we hit it.
741 // Eventually, an unknown constraint should just be treated as 'g'.
742 return false;
743 }
744 break;
745 case '&': // early clobber.
746 Info.setEarlyClobber();
747 break;
748 case '%': // commutative.
749 // FIXME: Check that there is a another register after this one.
750 break;
751 case 'r': // general register.
752 Info.setAllowsRegister();
753 break;
754 case 'm': // memory operand.
755 case 'o': // offsetable memory operand.
756 case 'V': // non-offsetable memory operand.
757 case '<': // autodecrement memory operand.
758 case '>': // autoincrement memory operand.
759 Info.setAllowsMemory();
760 break;
761 case 'g': // general register, memory operand or immediate integer.
762 case 'X': // any operand.
763 Info.setAllowsRegister();
764 Info.setAllowsMemory();
765 break;
766 case ',': // multiple alternative constraint. Pass it.
767 // Handle additional optional '=' or '+' modifiers.
768 if (Name[1] == '=' || Name[1] == '+')
769 Name++;
770 break;
771 case '#': // Ignore as constraint.
772 while (Name[1] && Name[1] != ',')
773 Name++;
774 break;
775 case '?': // Disparage slightly code.
776 case '!': // Disparage severely.
777 case '*': // Ignore for choosing register preferences.
778 case 'i': // Ignore i,n,E,F as output constraints (match from the other
779 // chars)
780 case 'n':
781 case 'E':
782 case 'F':
783 break; // Pass them.
784 }
785
786 Name++;
787 }
788
789 // Early clobber with a read-write constraint which doesn't permit registers
790 // is invalid.
791 if (Info.earlyClobber() && Info.isReadWrite() && !Info.allowsRegister())
792 return false;
793
794 // If a constraint allows neither memory nor register operands it contains
795 // only modifiers. Reject it.
796 return Info.allowsMemory() || Info.allowsRegister();
797 }
798
resolveSymbolicName(const char * & Name,ArrayRef<ConstraintInfo> OutputConstraints,unsigned & Index) const799 bool TargetInfo::resolveSymbolicName(const char *&Name,
800 ArrayRef<ConstraintInfo> OutputConstraints,
801 unsigned &Index) const {
802 assert(*Name == '[' && "Symbolic name did not start with '['");
803 Name++;
804 const char *Start = Name;
805 while (*Name && *Name != ']')
806 Name++;
807
808 if (!*Name) {
809 // Missing ']'
810 return false;
811 }
812
813 std::string SymbolicName(Start, Name - Start);
814
815 for (Index = 0; Index != OutputConstraints.size(); ++Index)
816 if (SymbolicName == OutputConstraints[Index].getName())
817 return true;
818
819 return false;
820 }
821
validateInputConstraint(MutableArrayRef<ConstraintInfo> OutputConstraints,ConstraintInfo & Info) const822 bool TargetInfo::validateInputConstraint(
823 MutableArrayRef<ConstraintInfo> OutputConstraints,
824 ConstraintInfo &Info) const {
825 const char *Name = Info.ConstraintStr.c_str();
826
827 if (!*Name)
828 return false;
829
830 while (*Name) {
831 switch (*Name) {
832 default:
833 // Check if we have a matching constraint
834 if (*Name >= '0' && *Name <= '9') {
835 const char *DigitStart = Name;
836 while (Name[1] >= '0' && Name[1] <= '9')
837 Name++;
838 const char *DigitEnd = Name;
839 unsigned i;
840 if (StringRef(DigitStart, DigitEnd - DigitStart + 1)
841 .getAsInteger(10, i))
842 return false;
843
844 // Check if matching constraint is out of bounds.
845 if (i >= OutputConstraints.size()) return false;
846
847 // A number must refer to an output only operand.
848 if (OutputConstraints[i].isReadWrite())
849 return false;
850
851 // If the constraint is already tied, it must be tied to the
852 // same operand referenced to by the number.
853 if (Info.hasTiedOperand() && Info.getTiedOperand() != i)
854 return false;
855
856 // The constraint should have the same info as the respective
857 // output constraint.
858 Info.setTiedOperand(i, OutputConstraints[i]);
859 } else if (!validateAsmConstraint(Name, Info)) {
860 // FIXME: This error return is in place temporarily so we can
861 // add more constraints as we hit it. Eventually, an unknown
862 // constraint should just be treated as 'g'.
863 return false;
864 }
865 break;
866 case '[': {
867 unsigned Index = 0;
868 if (!resolveSymbolicName(Name, OutputConstraints, Index))
869 return false;
870
871 // If the constraint is already tied, it must be tied to the
872 // same operand referenced to by the number.
873 if (Info.hasTiedOperand() && Info.getTiedOperand() != Index)
874 return false;
875
876 // A number must refer to an output only operand.
877 if (OutputConstraints[Index].isReadWrite())
878 return false;
879
880 Info.setTiedOperand(Index, OutputConstraints[Index]);
881 break;
882 }
883 case '%': // commutative
884 // FIXME: Fail if % is used with the last operand.
885 break;
886 case 'i': // immediate integer.
887 break;
888 case 'n': // immediate integer with a known value.
889 Info.setRequiresImmediate();
890 break;
891 case 'I': // Various constant constraints with target-specific meanings.
892 case 'J':
893 case 'K':
894 case 'L':
895 case 'M':
896 case 'N':
897 case 'O':
898 case 'P':
899 if (!validateAsmConstraint(Name, Info))
900 return false;
901 break;
902 case 'r': // general register.
903 Info.setAllowsRegister();
904 break;
905 case 'm': // memory operand.
906 case 'o': // offsettable memory operand.
907 case 'V': // non-offsettable memory operand.
908 case '<': // autodecrement memory operand.
909 case '>': // autoincrement memory operand.
910 Info.setAllowsMemory();
911 break;
912 case 'g': // general register, memory operand or immediate integer.
913 case 'X': // any operand.
914 Info.setAllowsRegister();
915 Info.setAllowsMemory();
916 break;
917 case 'E': // immediate floating point.
918 case 'F': // immediate floating point.
919 case 'p': // address operand.
920 break;
921 case ',': // multiple alternative constraint. Ignore comma.
922 break;
923 case '#': // Ignore as constraint.
924 while (Name[1] && Name[1] != ',')
925 Name++;
926 break;
927 case '?': // Disparage slightly code.
928 case '!': // Disparage severely.
929 case '*': // Ignore for choosing register preferences.
930 break; // Pass them.
931 }
932
933 Name++;
934 }
935
936 return true;
937 }
938
validatePointerAuthKey(const llvm::APSInt & value) const939 bool TargetInfo::validatePointerAuthKey(const llvm::APSInt &value) const {
940 return false;
941 }
942
CheckFixedPointBits() const943 void TargetInfo::CheckFixedPointBits() const {
944 // Check that the number of fractional and integral bits (and maybe sign) can
945 // fit into the bits given for a fixed point type.
946 assert(ShortAccumScale + getShortAccumIBits() + 1 <= ShortAccumWidth);
947 assert(AccumScale + getAccumIBits() + 1 <= AccumWidth);
948 assert(LongAccumScale + getLongAccumIBits() + 1 <= LongAccumWidth);
949 assert(getUnsignedShortAccumScale() + getUnsignedShortAccumIBits() <=
950 ShortAccumWidth);
951 assert(getUnsignedAccumScale() + getUnsignedAccumIBits() <= AccumWidth);
952 assert(getUnsignedLongAccumScale() + getUnsignedLongAccumIBits() <=
953 LongAccumWidth);
954
955 assert(getShortFractScale() + 1 <= ShortFractWidth);
956 assert(getFractScale() + 1 <= FractWidth);
957 assert(getLongFractScale() + 1 <= LongFractWidth);
958 assert(getUnsignedShortFractScale() <= ShortFractWidth);
959 assert(getUnsignedFractScale() <= FractWidth);
960 assert(getUnsignedLongFractScale() <= LongFractWidth);
961
962 // Each unsigned fract type has either the same number of fractional bits
963 // as, or one more fractional bit than, its corresponding signed fract type.
964 assert(getShortFractScale() == getUnsignedShortFractScale() ||
965 getShortFractScale() == getUnsignedShortFractScale() - 1);
966 assert(getFractScale() == getUnsignedFractScale() ||
967 getFractScale() == getUnsignedFractScale() - 1);
968 assert(getLongFractScale() == getUnsignedLongFractScale() ||
969 getLongFractScale() == getUnsignedLongFractScale() - 1);
970
971 // When arranged in order of increasing rank (see 6.3.1.3a), the number of
972 // fractional bits is nondecreasing for each of the following sets of
973 // fixed-point types:
974 // - signed fract types
975 // - unsigned fract types
976 // - signed accum types
977 // - unsigned accum types.
978 assert(getLongFractScale() >= getFractScale() &&
979 getFractScale() >= getShortFractScale());
980 assert(getUnsignedLongFractScale() >= getUnsignedFractScale() &&
981 getUnsignedFractScale() >= getUnsignedShortFractScale());
982 assert(LongAccumScale >= AccumScale && AccumScale >= ShortAccumScale);
983 assert(getUnsignedLongAccumScale() >= getUnsignedAccumScale() &&
984 getUnsignedAccumScale() >= getUnsignedShortAccumScale());
985
986 // When arranged in order of increasing rank (see 6.3.1.3a), the number of
987 // integral bits is nondecreasing for each of the following sets of
988 // fixed-point types:
989 // - signed accum types
990 // - unsigned accum types
991 assert(getLongAccumIBits() >= getAccumIBits() &&
992 getAccumIBits() >= getShortAccumIBits());
993 assert(getUnsignedLongAccumIBits() >= getUnsignedAccumIBits() &&
994 getUnsignedAccumIBits() >= getUnsignedShortAccumIBits());
995
996 // Each signed accum type has at least as many integral bits as its
997 // corresponding unsigned accum type.
998 assert(getShortAccumIBits() >= getUnsignedShortAccumIBits());
999 assert(getAccumIBits() >= getUnsignedAccumIBits());
1000 assert(getLongAccumIBits() >= getUnsignedLongAccumIBits());
1001 }
1002
copyAuxTarget(const TargetInfo * Aux)1003 void TargetInfo::copyAuxTarget(const TargetInfo *Aux) {
1004 auto *Target = static_cast<TransferrableTargetInfo*>(this);
1005 auto *Src = static_cast<const TransferrableTargetInfo*>(Aux);
1006 *Target = *Src;
1007 }
1008