1 //===-- CommandFlags.cpp - Command Line Flags Interface ---------*- 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 // This file contains codegen-specific flags that are shared between different 10 // command line tools. The tools "llc" and "opt" both use this file to prevent 11 // flag duplication. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/CodeGen/CommandFlags.h" 16 17 using namespace llvm; 18 19 #define CGOPT(TY, NAME) \ 20 static cl::opt<TY> *NAME##View; \ 21 TY codegen::get##NAME() { \ 22 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 23 return *NAME##View; \ 24 } 25 26 #define CGLIST(TY, NAME) \ 27 static cl::list<TY> *NAME##View; \ 28 std::vector<TY> codegen::get##NAME() { \ 29 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 30 return *NAME##View; \ 31 } 32 33 #define CGOPT_EXP(TY, NAME) \ 34 CGOPT(TY, NAME) \ 35 Optional<TY> codegen::getExplicit##NAME() { \ 36 if (NAME##View->getNumOccurrences()) { \ 37 TY res = *NAME##View; \ 38 return res; \ 39 } \ 40 return None; \ 41 } 42 43 CGOPT(std::string, MArch) 44 CGOPT(std::string, MCPU) 45 CGLIST(std::string, MAttrs) 46 CGOPT_EXP(Reloc::Model, RelocModel) 47 CGOPT(ThreadModel::Model, ThreadModel) 48 CGOPT_EXP(CodeModel::Model, CodeModel) 49 CGOPT(ExceptionHandling, ExceptionModel) 50 CGOPT_EXP(CodeGenFileType, FileType) 51 CGOPT(FramePointer::FP, FramePointerUsage) 52 CGOPT(bool, EnableUnsafeFPMath) 53 CGOPT(bool, EnableNoInfsFPMath) 54 CGOPT(bool, EnableNoNaNsFPMath) 55 CGOPT(bool, EnableNoSignedZerosFPMath) 56 CGOPT(bool, EnableNoTrappingFPMath) 57 CGOPT(FPDenormal::DenormalMode, DenormalFPMath) 58 CGOPT(bool, EnableHonorSignDependentRoundingFPMath) 59 CGOPT(FloatABI::ABIType, FloatABIForCalls) 60 CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) 61 CGOPT(bool, DontPlaceZerosInBSS) 62 CGOPT(bool, EnableGuaranteedTailCallOpt) 63 CGOPT(bool, DisableTailCalls) 64 CGOPT(bool, StackSymbolOrdering) 65 CGOPT(unsigned, OverrideStackAlignment) 66 CGOPT(bool, StackRealign) 67 CGOPT(std::string, TrapFuncName) 68 CGOPT(bool, UseCtors) 69 CGOPT(bool, RelaxELFRelocations) 70 CGOPT_EXP(bool, DataSections) 71 CGOPT_EXP(bool, FunctionSections) 72 CGOPT(std::string, BBSections) 73 CGOPT(unsigned, TLSSize) 74 CGOPT(bool, EmulatedTLS) 75 CGOPT(bool, UniqueSectionNames) 76 CGOPT(bool, UniqueBBSectionNames) 77 CGOPT(EABI, EABIVersion) 78 CGOPT(DebuggerKind, DebuggerTuningOpt) 79 CGOPT(bool, EnableStackSizeSection) 80 CGOPT(bool, EnableAddrsig) 81 CGOPT(bool, EmitCallSiteInfo) 82 CGOPT(bool, EnableDebugEntryValues) 83 CGOPT(bool, ForceDwarfFrameSection) 84 85 codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { 86 #define CGBINDOPT(NAME) \ 87 do { \ 88 NAME##View = std::addressof(NAME); \ 89 } while (0) 90 91 static cl::opt<std::string> MArch( 92 "march", cl::desc("Architecture to generate code for (see --version)")); 93 CGBINDOPT(MArch); 94 95 static cl::opt<std::string> MCPU( 96 "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"), 97 cl::value_desc("cpu-name"), cl::init("")); 98 CGBINDOPT(MCPU); 99 100 static cl::list<std::string> MAttrs( 101 "mattr", cl::CommaSeparated, 102 cl::desc("Target specific attributes (-mattr=help for details)"), 103 cl::value_desc("a1,+a2,-a3,...")); 104 CGBINDOPT(MAttrs); 105 106 static cl::opt<Reloc::Model> RelocModel( 107 "relocation-model", cl::desc("Choose relocation model"), 108 cl::values( 109 clEnumValN(Reloc::Static, "static", "Non-relocatable code"), 110 clEnumValN(Reloc::PIC_, "pic", 111 "Fully relocatable, position independent code"), 112 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 113 "Relocatable external references, non-relocatable code"), 114 clEnumValN( 115 Reloc::ROPI, "ropi", 116 "Code and read-only data relocatable, accessed PC-relative"), 117 clEnumValN( 118 Reloc::RWPI, "rwpi", 119 "Read-write data relocatable, accessed relative to static base"), 120 clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", 121 "Combination of ropi and rwpi"))); 122 CGBINDOPT(RelocModel); 123 124 static cl::opt<ThreadModel::Model> ThreadModel( 125 "thread-model", cl::desc("Choose threading model"), 126 cl::init(ThreadModel::POSIX), 127 cl::values( 128 clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"), 129 clEnumValN(ThreadModel::Single, "single", "Single thread model"))); 130 CGBINDOPT(ThreadModel); 131 132 static cl::opt<CodeModel::Model> CodeModel( 133 "code-model", cl::desc("Choose code model"), 134 cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"), 135 clEnumValN(CodeModel::Small, "small", "Small code model"), 136 clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"), 137 clEnumValN(CodeModel::Medium, "medium", "Medium code model"), 138 clEnumValN(CodeModel::Large, "large", "Large code model"))); 139 CGBINDOPT(CodeModel); 140 141 static cl::opt<ExceptionHandling> ExceptionModel( 142 "exception-model", cl::desc("exception model"), 143 cl::init(ExceptionHandling::None), 144 cl::values( 145 clEnumValN(ExceptionHandling::None, "default", 146 "default exception handling model"), 147 clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", 148 "DWARF-like CFI based exception handling"), 149 clEnumValN(ExceptionHandling::SjLj, "sjlj", 150 "SjLj exception handling"), 151 clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), 152 clEnumValN(ExceptionHandling::WinEH, "wineh", 153 "Windows exception model"), 154 clEnumValN(ExceptionHandling::Wasm, "wasm", 155 "WebAssembly exception handling"))); 156 CGBINDOPT(ExceptionModel); 157 158 static cl::opt<CodeGenFileType> FileType( 159 "filetype", cl::init(CGFT_AssemblyFile), 160 cl::desc( 161 "Choose a file type (not all types are supported by all targets):"), 162 cl::values( 163 clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"), 164 clEnumValN(CGFT_ObjectFile, "obj", 165 "Emit a native object ('.o') file"), 166 clEnumValN(CGFT_Null, "null", 167 "Emit nothing, for performance testing"))); 168 CGBINDOPT(FileType); 169 170 static cl::opt<FramePointer::FP> FramePointerUsage( 171 "frame-pointer", 172 cl::desc("Specify frame pointer elimination optimization"), 173 cl::init(FramePointer::None), 174 cl::values( 175 clEnumValN(FramePointer::All, "all", 176 "Disable frame pointer elimination"), 177 clEnumValN(FramePointer::NonLeaf, "non-leaf", 178 "Disable frame pointer elimination for non-leaf frame"), 179 clEnumValN(FramePointer::None, "none", 180 "Enable frame pointer elimination"))); 181 CGBINDOPT(FramePointerUsage); 182 183 static cl::opt<bool> EnableUnsafeFPMath( 184 "enable-unsafe-fp-math", 185 cl::desc("Enable optimizations that may decrease FP precision"), 186 cl::init(false)); 187 CGBINDOPT(EnableUnsafeFPMath); 188 189 static cl::opt<bool> EnableNoInfsFPMath( 190 "enable-no-infs-fp-math", 191 cl::desc("Enable FP math optimizations that assume no +-Infs"), 192 cl::init(false)); 193 CGBINDOPT(EnableNoInfsFPMath); 194 195 static cl::opt<bool> EnableNoNaNsFPMath( 196 "enable-no-nans-fp-math", 197 cl::desc("Enable FP math optimizations that assume no NaNs"), 198 cl::init(false)); 199 CGBINDOPT(EnableNoNaNsFPMath); 200 201 static cl::opt<bool> EnableNoSignedZerosFPMath( 202 "enable-no-signed-zeros-fp-math", 203 cl::desc("Enable FP math optimizations that assume " 204 "the sign of 0 is insignificant"), 205 cl::init(false)); 206 CGBINDOPT(EnableNoSignedZerosFPMath); 207 208 static cl::opt<bool> EnableNoTrappingFPMath( 209 "enable-no-trapping-fp-math", 210 cl::desc("Enable setting the FP exceptions build " 211 "attribute not to use exceptions"), 212 cl::init(false)); 213 CGBINDOPT(EnableNoTrappingFPMath); 214 215 static cl::opt<FPDenormal::DenormalMode> DenormalFPMath( 216 "denormal-fp-math", 217 cl::desc( 218 "Select which denormal numbers the code is permitted to require"), 219 cl::init(FPDenormal::IEEE), 220 cl::values( 221 clEnumValN(FPDenormal::IEEE, "ieee", "IEEE 754 denormal numbers"), 222 clEnumValN(FPDenormal::PreserveSign, "preserve-sign", 223 "the sign of a flushed-to-zero number is preserved " 224 "in the sign of 0"), 225 clEnumValN(FPDenormal::PositiveZero, "positive-zero", 226 "denormals are flushed to positive zero"))); 227 CGBINDOPT(DenormalFPMath); 228 229 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 230 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 231 cl::desc("Force codegen to assume rounding mode can change dynamically"), 232 cl::init(false)); 233 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 234 235 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 236 "float-abi", cl::desc("Choose float ABI type"), 237 cl::init(FloatABI::Default), 238 cl::values(clEnumValN(FloatABI::Default, "default", 239 "Target default float ABI type"), 240 clEnumValN(FloatABI::Soft, "soft", 241 "Soft float ABI (implied by -soft-float)"), 242 clEnumValN(FloatABI::Hard, "hard", 243 "Hard float ABI (uses FP registers)"))); 244 CGBINDOPT(FloatABIForCalls); 245 246 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 247 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 248 cl::init(FPOpFusion::Standard), 249 cl::values( 250 clEnumValN(FPOpFusion::Fast, "fast", 251 "Fuse FP ops whenever profitable"), 252 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 253 clEnumValN(FPOpFusion::Strict, "off", 254 "Only fuse FP ops when the result won't be affected."))); 255 CGBINDOPT(FuseFPOps); 256 257 static cl::opt<bool> DontPlaceZerosInBSS( 258 "nozero-initialized-in-bss", 259 cl::desc("Don't place zero-initialized symbols into bss section"), 260 cl::init(false)); 261 CGBINDOPT(DontPlaceZerosInBSS); 262 263 static cl::opt<bool> EnableGuaranteedTailCallOpt( 264 "tailcallopt", 265 cl::desc( 266 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 267 cl::init(false)); 268 CGBINDOPT(EnableGuaranteedTailCallOpt); 269 270 static cl::opt<bool> DisableTailCalls( 271 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 272 CGBINDOPT(DisableTailCalls); 273 274 static cl::opt<bool> StackSymbolOrdering( 275 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 276 cl::init(true)); 277 CGBINDOPT(StackSymbolOrdering); 278 279 static cl::opt<unsigned> OverrideStackAlignment( 280 "stack-alignment", cl::desc("Override default stack alignment"), 281 cl::init(0)); 282 CGBINDOPT(OverrideStackAlignment); 283 284 static cl::opt<bool> StackRealign( 285 "stackrealign", 286 cl::desc("Force align the stack to the minimum alignment"), 287 cl::init(false)); 288 CGBINDOPT(StackRealign); 289 290 static cl::opt<std::string> TrapFuncName( 291 "trap-func", cl::Hidden, 292 cl::desc("Emit a call to trap function rather than a trap instruction"), 293 cl::init("")); 294 CGBINDOPT(TrapFuncName); 295 296 static cl::opt<bool> UseCtors("use-ctors", 297 cl::desc("Use .ctors instead of .init_array."), 298 cl::init(false)); 299 CGBINDOPT(UseCtors); 300 301 static cl::opt<bool> RelaxELFRelocations( 302 "relax-elf-relocations", 303 cl::desc( 304 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 305 cl::init(false)); 306 CGBINDOPT(RelaxELFRelocations); 307 308 static cl::opt<bool> DataSections( 309 "data-sections", cl::desc("Emit data into separate sections"), 310 cl::init(false)); 311 CGBINDOPT(DataSections); 312 313 static cl::opt<bool> FunctionSections( 314 "function-sections", cl::desc("Emit functions into separate sections"), 315 cl::init(false)); 316 CGBINDOPT(FunctionSections); 317 318 static cl::opt<std::string> BBSections( 319 "basicblock-sections", 320 cl::desc("Emit basic blocks into separate sections"), 321 cl::value_desc("all | <function list (file)> | labels | none"), 322 cl::init("none")); 323 CGBINDOPT(BBSections); 324 325 static cl::opt<unsigned> TLSSize( 326 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 327 CGBINDOPT(TLSSize); 328 329 static cl::opt<bool> EmulatedTLS( 330 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 331 CGBINDOPT(EmulatedTLS); 332 333 static cl::opt<bool> UniqueSectionNames( 334 "unique-section-names", cl::desc("Give unique names to every section"), 335 cl::init(true)); 336 CGBINDOPT(UniqueSectionNames); 337 338 static cl::opt<bool> UniqueBBSectionNames( 339 "unique-bb-section-names", 340 cl::desc("Give unique names to every basic block section"), 341 cl::init(false)); 342 CGBINDOPT(UniqueBBSectionNames); 343 344 static cl::opt<EABI> EABIVersion( 345 "meabi", cl::desc("Set EABI type (default depends on triple):"), 346 cl::init(EABI::Default), 347 cl::values( 348 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 349 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 350 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 351 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 352 CGBINDOPT(EABIVersion); 353 354 static cl::opt<DebuggerKind> DebuggerTuningOpt( 355 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 356 cl::init(DebuggerKind::Default), 357 cl::values( 358 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 359 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 360 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 361 CGBINDOPT(DebuggerTuningOpt); 362 363 static cl::opt<bool> EnableStackSizeSection( 364 "stack-size-section", 365 cl::desc("Emit a section containing stack size metadata"), 366 cl::init(false)); 367 CGBINDOPT(EnableStackSizeSection); 368 369 static cl::opt<bool> EnableAddrsig( 370 "addrsig", cl::desc("Emit an address-significance table"), 371 cl::init(false)); 372 CGBINDOPT(EnableAddrsig); 373 374 static cl::opt<bool> EmitCallSiteInfo( 375 "emit-call-site-info", 376 cl::desc( 377 "Emit call site debug information, if debug information is enabled."), 378 cl::init(false)); 379 CGBINDOPT(EmitCallSiteInfo); 380 381 static cl::opt<bool> EnableDebugEntryValues( 382 "debug-entry-values", 383 cl::desc("Emit debug info about parameter's entry values"), 384 cl::init(false)); 385 CGBINDOPT(EnableDebugEntryValues); 386 387 static cl::opt<bool> ForceDwarfFrameSection( 388 "force-dwarf-frame-section", 389 cl::desc("Always emit a debug frame section."), cl::init(false)); 390 CGBINDOPT(ForceDwarfFrameSection); 391 392 #undef CGBINDOPT 393 394 mc::RegisterMCTargetOptionsFlags(); 395 } 396 397 llvm::BasicBlockSection 398 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 399 if (getBBSections() == "all") 400 return BasicBlockSection::All; 401 else if (getBBSections() == "labels") 402 return BasicBlockSection::Labels; 403 else if (getBBSections() == "none") 404 return BasicBlockSection::None; 405 else { 406 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 407 MemoryBuffer::getFile(getBBSections()); 408 if (!MBOrErr) { 409 errs() << "Error loading basic block sections function list file: " 410 << MBOrErr.getError().message() << "\n"; 411 } else { 412 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 413 } 414 return BasicBlockSection::List; 415 } 416 } 417 418 // Common utility function tightly tied to the options listed here. Initializes 419 // a TargetOptions object with CodeGen flags and returns it. 420 TargetOptions codegen::InitTargetOptionsFromCodeGenFlags() { 421 TargetOptions Options; 422 Options.AllowFPOpFusion = getFuseFPOps(); 423 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 424 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 425 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 426 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 427 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 428 Options.FPDenormalMode = getDenormalFPMath(); 429 Options.HonorSignDependentRoundingFPMathOption = 430 getEnableHonorSignDependentRoundingFPMath(); 431 if (getFloatABIForCalls() != FloatABI::Default) 432 Options.FloatABIType = getFloatABIForCalls(); 433 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 434 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 435 Options.StackAlignmentOverride = getOverrideStackAlignment(); 436 Options.StackSymbolOrdering = getStackSymbolOrdering(); 437 Options.UseInitArray = !getUseCtors(); 438 Options.RelaxELFRelocations = getRelaxELFRelocations(); 439 Options.DataSections = getDataSections(); 440 Options.FunctionSections = getFunctionSections(); 441 Options.BBSections = getBBSectionsMode(Options); 442 Options.UniqueSectionNames = getUniqueSectionNames(); 443 Options.UniqueBBSectionNames = getUniqueBBSectionNames(); 444 Options.TLSSize = getTLSSize(); 445 Options.EmulatedTLS = getEmulatedTLS(); 446 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 447 Options.ExceptionModel = getExceptionModel(); 448 Options.EmitStackSizeSection = getEnableStackSizeSection(); 449 Options.EmitAddrsig = getEnableAddrsig(); 450 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 451 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 452 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 453 454 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 455 456 Options.ThreadModel = getThreadModel(); 457 Options.EABIVersion = getEABIVersion(); 458 Options.DebuggerTuning = getDebuggerTuningOpt(); 459 460 return Options; 461 } 462 463 std::string codegen::getCPUStr() { 464 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 465 // this will set the CPU to an empty string which tells the target to 466 // pick a basic default. 467 if (getMCPU() == "native") 468 return std::string(sys::getHostCPUName()); 469 470 return getMCPU(); 471 } 472 473 std::string codegen::getFeaturesStr() { 474 SubtargetFeatures Features; 475 476 // If user asked for the 'native' CPU, we need to autodetect features. 477 // This is necessary for x86 where the CPU might not support all the 478 // features the autodetected CPU name lists in the target. For example, 479 // not all Sandybridge processors support AVX. 480 if (getMCPU() == "native") { 481 StringMap<bool> HostFeatures; 482 if (sys::getHostCPUFeatures(HostFeatures)) 483 for (auto &F : HostFeatures) 484 Features.AddFeature(F.first(), F.second); 485 } 486 487 for (auto const &MAttr : getMAttrs()) 488 Features.AddFeature(MAttr); 489 490 return Features.getString(); 491 } 492 493 std::vector<std::string> codegen::getFeatureList() { 494 SubtargetFeatures Features; 495 496 // If user asked for the 'native' CPU, we need to autodetect features. 497 // This is necessary for x86 where the CPU might not support all the 498 // features the autodetected CPU name lists in the target. For example, 499 // not all Sandybridge processors support AVX. 500 if (getMCPU() == "native") { 501 StringMap<bool> HostFeatures; 502 if (sys::getHostCPUFeatures(HostFeatures)) 503 for (auto &F : HostFeatures) 504 Features.AddFeature(F.first(), F.second); 505 } 506 507 for (auto const &MAttr : getMAttrs()) 508 Features.AddFeature(MAttr); 509 510 return Features.getFeatures(); 511 } 512 513 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 514 B.addAttribute(Name, Val ? "true" : "false"); 515 } 516 517 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 518 do { \ 519 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 520 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 521 } while (0) 522 523 /// Set function attributes of function \p F based on CPU, Features, and command 524 /// line flags. 525 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 526 Function &F) { 527 auto &Ctx = F.getContext(); 528 AttributeList Attrs = F.getAttributes(); 529 AttrBuilder NewAttrs; 530 531 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 532 NewAttrs.addAttribute("target-cpu", CPU); 533 if (!Features.empty()) { 534 // Append the command line features to any that are already on the function. 535 StringRef OldFeatures = 536 F.getFnAttribute("target-features").getValueAsString(); 537 if (OldFeatures.empty()) 538 NewAttrs.addAttribute("target-features", Features); 539 else { 540 SmallString<256> Appended(OldFeatures); 541 Appended.push_back(','); 542 Appended.append(Features); 543 NewAttrs.addAttribute("target-features", Appended); 544 } 545 } 546 if (FramePointerUsageView->getNumOccurrences() > 0 && 547 !F.hasFnAttribute("frame-pointer")) { 548 if (getFramePointerUsage() == FramePointer::All) 549 NewAttrs.addAttribute("frame-pointer", "all"); 550 else if (getFramePointerUsage() == FramePointer::NonLeaf) 551 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 552 else if (getFramePointerUsage() == FramePointer::None) 553 NewAttrs.addAttribute("frame-pointer", "none"); 554 } 555 if (DisableTailCallsView->getNumOccurrences() > 0) 556 NewAttrs.addAttribute("disable-tail-calls", 557 toStringRef(getDisableTailCalls())); 558 if (getStackRealign()) 559 NewAttrs.addAttribute("stackrealign"); 560 561 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 562 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 563 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 564 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 565 566 if (TrapFuncNameView->getNumOccurrences() > 0) 567 for (auto &B : F) 568 for (auto &I : B) 569 if (auto *Call = dyn_cast<CallInst>(&I)) 570 if (const auto *F = Call->getCalledFunction()) 571 if (F->getIntrinsicID() == Intrinsic::debugtrap || 572 F->getIntrinsicID() == Intrinsic::trap) 573 Call->addAttribute( 574 AttributeList::FunctionIndex, 575 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 576 577 // Let NewAttrs override Attrs. 578 F.setAttributes( 579 Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); 580 } 581 582 /// Set function attributes of functions in Module M based on CPU, 583 /// Features, and command line flags. 584 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 585 Module &M) { 586 for (Function &F : M) 587 setFunctionAttributes(CPU, Features, F); 588 } 589