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 #include "llvm/IR/Module.h" 17 #include "llvm/MC/SubtargetFeature.h" 18 #include "llvm/Support/CommandLine.h" 19 #include "llvm/Support/Host.h" 20 21 using namespace llvm; 22 23 #define CGOPT(TY, NAME) \ 24 static cl::opt<TY> *NAME##View; \ 25 TY codegen::get##NAME() { \ 26 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 27 return *NAME##View; \ 28 } 29 30 #define CGLIST(TY, NAME) \ 31 static cl::list<TY> *NAME##View; \ 32 std::vector<TY> codegen::get##NAME() { \ 33 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 34 return *NAME##View; \ 35 } 36 37 #define CGOPT_EXP(TY, NAME) \ 38 CGOPT(TY, NAME) \ 39 Optional<TY> codegen::getExplicit##NAME() { \ 40 if (NAME##View->getNumOccurrences()) { \ 41 TY res = *NAME##View; \ 42 return res; \ 43 } \ 44 return None; \ 45 } 46 47 CGOPT(std::string, MArch) 48 CGOPT(std::string, MCPU) 49 CGLIST(std::string, MAttrs) 50 CGOPT_EXP(Reloc::Model, RelocModel) 51 CGOPT(ThreadModel::Model, ThreadModel) 52 CGOPT_EXP(CodeModel::Model, CodeModel) 53 CGOPT(ExceptionHandling, ExceptionModel) 54 CGOPT_EXP(CodeGenFileType, FileType) 55 CGOPT(FramePointer::FP, FramePointerUsage) 56 CGOPT(bool, EnableUnsafeFPMath) 57 CGOPT(bool, EnableNoInfsFPMath) 58 CGOPT(bool, EnableNoNaNsFPMath) 59 CGOPT(bool, EnableNoSignedZerosFPMath) 60 CGOPT(bool, EnableNoTrappingFPMath) 61 CGOPT(bool, EnableAIXExtendedAltivecABI) 62 CGOPT(DenormalMode::DenormalModeKind, DenormalFPMath) 63 CGOPT(DenormalMode::DenormalModeKind, DenormalFP32Math) 64 CGOPT(bool, EnableHonorSignDependentRoundingFPMath) 65 CGOPT(FloatABI::ABIType, FloatABIForCalls) 66 CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) 67 CGOPT(bool, DontPlaceZerosInBSS) 68 CGOPT(bool, EnableGuaranteedTailCallOpt) 69 CGOPT(bool, DisableTailCalls) 70 CGOPT(bool, StackSymbolOrdering) 71 CGOPT(unsigned, OverrideStackAlignment) 72 CGOPT(bool, StackRealign) 73 CGOPT(std::string, TrapFuncName) 74 CGOPT(bool, UseCtors) 75 CGOPT(bool, RelaxELFRelocations) 76 CGOPT_EXP(bool, DataSections) 77 CGOPT_EXP(bool, FunctionSections) 78 CGOPT(bool, IgnoreXCOFFVisibility) 79 CGOPT(std::string, BBSections) 80 CGOPT(std::string, StackProtectorGuard) 81 CGOPT(unsigned, StackProtectorGuardOffset) 82 CGOPT(std::string, StackProtectorGuardReg) 83 CGOPT(unsigned, TLSSize) 84 CGOPT(bool, EmulatedTLS) 85 CGOPT(bool, UniqueSectionNames) 86 CGOPT(bool, UniqueBasicBlockSectionNames) 87 CGOPT(EABI, EABIVersion) 88 CGOPT(DebuggerKind, DebuggerTuningOpt) 89 CGOPT(bool, EnableStackSizeSection) 90 CGOPT(bool, EnableAddrsig) 91 CGOPT(bool, EmitCallSiteInfo) 92 CGOPT(bool, EnableMachineFunctionSplitter) 93 CGOPT(bool, EnableDebugEntryValues) 94 CGOPT(bool, PseudoProbeForProfiling) 95 CGOPT(bool, ValueTrackingVariableLocations) 96 CGOPT(bool, ForceDwarfFrameSection) 97 CGOPT(bool, XRayOmitFunctionIndex) 98 99 codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { 100 #define CGBINDOPT(NAME) \ 101 do { \ 102 NAME##View = std::addressof(NAME); \ 103 } while (0) 104 105 static cl::opt<std::string> MArch( 106 "march", cl::desc("Architecture to generate code for (see --version)")); 107 CGBINDOPT(MArch); 108 109 static cl::opt<std::string> MCPU( 110 "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"), 111 cl::value_desc("cpu-name"), cl::init("")); 112 CGBINDOPT(MCPU); 113 114 static cl::list<std::string> MAttrs( 115 "mattr", cl::CommaSeparated, 116 cl::desc("Target specific attributes (-mattr=help for details)"), 117 cl::value_desc("a1,+a2,-a3,...")); 118 CGBINDOPT(MAttrs); 119 120 static cl::opt<Reloc::Model> RelocModel( 121 "relocation-model", cl::desc("Choose relocation model"), 122 cl::values( 123 clEnumValN(Reloc::Static, "static", "Non-relocatable code"), 124 clEnumValN(Reloc::PIC_, "pic", 125 "Fully relocatable, position independent code"), 126 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 127 "Relocatable external references, non-relocatable code"), 128 clEnumValN( 129 Reloc::ROPI, "ropi", 130 "Code and read-only data relocatable, accessed PC-relative"), 131 clEnumValN( 132 Reloc::RWPI, "rwpi", 133 "Read-write data relocatable, accessed relative to static base"), 134 clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", 135 "Combination of ropi and rwpi"))); 136 CGBINDOPT(RelocModel); 137 138 static cl::opt<ThreadModel::Model> ThreadModel( 139 "thread-model", cl::desc("Choose threading model"), 140 cl::init(ThreadModel::POSIX), 141 cl::values( 142 clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"), 143 clEnumValN(ThreadModel::Single, "single", "Single thread model"))); 144 CGBINDOPT(ThreadModel); 145 146 static cl::opt<CodeModel::Model> CodeModel( 147 "code-model", cl::desc("Choose code model"), 148 cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"), 149 clEnumValN(CodeModel::Small, "small", "Small code model"), 150 clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"), 151 clEnumValN(CodeModel::Medium, "medium", "Medium code model"), 152 clEnumValN(CodeModel::Large, "large", "Large code model"))); 153 CGBINDOPT(CodeModel); 154 155 static cl::opt<ExceptionHandling> ExceptionModel( 156 "exception-model", cl::desc("exception model"), 157 cl::init(ExceptionHandling::None), 158 cl::values( 159 clEnumValN(ExceptionHandling::None, "default", 160 "default exception handling model"), 161 clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", 162 "DWARF-like CFI based exception handling"), 163 clEnumValN(ExceptionHandling::SjLj, "sjlj", 164 "SjLj exception handling"), 165 clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), 166 clEnumValN(ExceptionHandling::WinEH, "wineh", 167 "Windows exception model"), 168 clEnumValN(ExceptionHandling::Wasm, "wasm", 169 "WebAssembly exception handling"))); 170 CGBINDOPT(ExceptionModel); 171 172 static cl::opt<CodeGenFileType> FileType( 173 "filetype", cl::init(CGFT_AssemblyFile), 174 cl::desc( 175 "Choose a file type (not all types are supported by all targets):"), 176 cl::values( 177 clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"), 178 clEnumValN(CGFT_ObjectFile, "obj", 179 "Emit a native object ('.o') file"), 180 clEnumValN(CGFT_Null, "null", 181 "Emit nothing, for performance testing"))); 182 CGBINDOPT(FileType); 183 184 static cl::opt<FramePointer::FP> FramePointerUsage( 185 "frame-pointer", 186 cl::desc("Specify frame pointer elimination optimization"), 187 cl::init(FramePointer::None), 188 cl::values( 189 clEnumValN(FramePointer::All, "all", 190 "Disable frame pointer elimination"), 191 clEnumValN(FramePointer::NonLeaf, "non-leaf", 192 "Disable frame pointer elimination for non-leaf frame"), 193 clEnumValN(FramePointer::None, "none", 194 "Enable frame pointer elimination"))); 195 CGBINDOPT(FramePointerUsage); 196 197 static cl::opt<bool> EnableUnsafeFPMath( 198 "enable-unsafe-fp-math", 199 cl::desc("Enable optimizations that may decrease FP precision"), 200 cl::init(false)); 201 CGBINDOPT(EnableUnsafeFPMath); 202 203 static cl::opt<bool> EnableNoInfsFPMath( 204 "enable-no-infs-fp-math", 205 cl::desc("Enable FP math optimizations that assume no +-Infs"), 206 cl::init(false)); 207 CGBINDOPT(EnableNoInfsFPMath); 208 209 static cl::opt<bool> EnableNoNaNsFPMath( 210 "enable-no-nans-fp-math", 211 cl::desc("Enable FP math optimizations that assume no NaNs"), 212 cl::init(false)); 213 CGBINDOPT(EnableNoNaNsFPMath); 214 215 static cl::opt<bool> EnableNoSignedZerosFPMath( 216 "enable-no-signed-zeros-fp-math", 217 cl::desc("Enable FP math optimizations that assume " 218 "the sign of 0 is insignificant"), 219 cl::init(false)); 220 CGBINDOPT(EnableNoSignedZerosFPMath); 221 222 static cl::opt<bool> EnableNoTrappingFPMath( 223 "enable-no-trapping-fp-math", 224 cl::desc("Enable setting the FP exceptions build " 225 "attribute not to use exceptions"), 226 cl::init(false)); 227 CGBINDOPT(EnableNoTrappingFPMath); 228 229 static const auto DenormFlagEnumOptions = 230 cl::values(clEnumValN(DenormalMode::IEEE, "ieee", 231 "IEEE 754 denormal numbers"), 232 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 233 "the sign of a flushed-to-zero number is preserved " 234 "in the sign of 0"), 235 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 236 "denormals are flushed to positive zero")); 237 238 // FIXME: Doesn't have way to specify separate input and output modes. 239 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 240 "denormal-fp-math", 241 cl::desc("Select which denormal numbers the code is permitted to require"), 242 cl::init(DenormalMode::IEEE), 243 DenormFlagEnumOptions); 244 CGBINDOPT(DenormalFPMath); 245 246 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 247 "denormal-fp-math-f32", 248 cl::desc("Select which denormal numbers the code is permitted to require for float"), 249 cl::init(DenormalMode::Invalid), 250 DenormFlagEnumOptions); 251 CGBINDOPT(DenormalFP32Math); 252 253 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 254 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 255 cl::desc("Force codegen to assume rounding mode can change dynamically"), 256 cl::init(false)); 257 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 258 259 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 260 "float-abi", cl::desc("Choose float ABI type"), 261 cl::init(FloatABI::Default), 262 cl::values(clEnumValN(FloatABI::Default, "default", 263 "Target default float ABI type"), 264 clEnumValN(FloatABI::Soft, "soft", 265 "Soft float ABI (implied by -soft-float)"), 266 clEnumValN(FloatABI::Hard, "hard", 267 "Hard float ABI (uses FP registers)"))); 268 CGBINDOPT(FloatABIForCalls); 269 270 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 271 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 272 cl::init(FPOpFusion::Standard), 273 cl::values( 274 clEnumValN(FPOpFusion::Fast, "fast", 275 "Fuse FP ops whenever profitable"), 276 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 277 clEnumValN(FPOpFusion::Strict, "off", 278 "Only fuse FP ops when the result won't be affected."))); 279 CGBINDOPT(FuseFPOps); 280 281 static cl::opt<bool> DontPlaceZerosInBSS( 282 "nozero-initialized-in-bss", 283 cl::desc("Don't place zero-initialized symbols into bss section"), 284 cl::init(false)); 285 CGBINDOPT(DontPlaceZerosInBSS); 286 287 static cl::opt<bool> EnableAIXExtendedAltivecABI( 288 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 289 cl::init(false)); 290 CGBINDOPT(EnableAIXExtendedAltivecABI); 291 292 static cl::opt<bool> EnableGuaranteedTailCallOpt( 293 "tailcallopt", 294 cl::desc( 295 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 296 cl::init(false)); 297 CGBINDOPT(EnableGuaranteedTailCallOpt); 298 299 static cl::opt<bool> DisableTailCalls( 300 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 301 CGBINDOPT(DisableTailCalls); 302 303 static cl::opt<bool> StackSymbolOrdering( 304 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 305 cl::init(true)); 306 CGBINDOPT(StackSymbolOrdering); 307 308 static cl::opt<unsigned> OverrideStackAlignment( 309 "stack-alignment", cl::desc("Override default stack alignment"), 310 cl::init(0)); 311 CGBINDOPT(OverrideStackAlignment); 312 313 static cl::opt<bool> StackRealign( 314 "stackrealign", 315 cl::desc("Force align the stack to the minimum alignment"), 316 cl::init(false)); 317 CGBINDOPT(StackRealign); 318 319 static cl::opt<std::string> TrapFuncName( 320 "trap-func", cl::Hidden, 321 cl::desc("Emit a call to trap function rather than a trap instruction"), 322 cl::init("")); 323 CGBINDOPT(TrapFuncName); 324 325 static cl::opt<bool> UseCtors("use-ctors", 326 cl::desc("Use .ctors instead of .init_array."), 327 cl::init(false)); 328 CGBINDOPT(UseCtors); 329 330 static cl::opt<bool> RelaxELFRelocations( 331 "relax-elf-relocations", 332 cl::desc( 333 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 334 cl::init(false)); 335 CGBINDOPT(RelaxELFRelocations); 336 337 static cl::opt<bool> DataSections( 338 "data-sections", cl::desc("Emit data into separate sections"), 339 cl::init(false)); 340 CGBINDOPT(DataSections); 341 342 static cl::opt<bool> FunctionSections( 343 "function-sections", cl::desc("Emit functions into separate sections"), 344 cl::init(false)); 345 CGBINDOPT(FunctionSections); 346 347 static cl::opt<bool> IgnoreXCOFFVisibility( 348 "ignore-xcoff-visibility", 349 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 350 "all symbols 'unspecified' visibility in XCOFF object file"), 351 cl::init(false)); 352 CGBINDOPT(IgnoreXCOFFVisibility); 353 354 static cl::opt<std::string> BBSections( 355 "basic-block-sections", 356 cl::desc("Emit basic blocks into separate sections"), 357 cl::value_desc("all | <function list (file)> | labels | none"), 358 cl::init("none")); 359 CGBINDOPT(BBSections); 360 361 static cl::opt<std::string> StackProtectorGuard( 362 "stack-protector-guard", cl::desc("Stack protector guard mode"), 363 cl::init("none")); 364 CGBINDOPT(StackProtectorGuard); 365 366 static cl::opt<std::string> StackProtectorGuardReg( 367 "stack-protector-guard-reg", cl::desc("Stack protector guard register"), 368 cl::init("none")); 369 CGBINDOPT(StackProtectorGuardReg); 370 371 static cl::opt<unsigned> StackProtectorGuardOffset( 372 "stack-protector-guard-offset", cl::desc("Stack protector guard offset"), 373 cl::init((unsigned)-1)); 374 CGBINDOPT(StackProtectorGuardOffset); 375 376 static cl::opt<unsigned> TLSSize( 377 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 378 CGBINDOPT(TLSSize); 379 380 static cl::opt<bool> EmulatedTLS( 381 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 382 CGBINDOPT(EmulatedTLS); 383 384 static cl::opt<bool> UniqueSectionNames( 385 "unique-section-names", cl::desc("Give unique names to every section"), 386 cl::init(true)); 387 CGBINDOPT(UniqueSectionNames); 388 389 static cl::opt<bool> UniqueBasicBlockSectionNames( 390 "unique-basic-block-section-names", 391 cl::desc("Give unique names to every basic block section"), 392 cl::init(false)); 393 CGBINDOPT(UniqueBasicBlockSectionNames); 394 395 static cl::opt<EABI> EABIVersion( 396 "meabi", cl::desc("Set EABI type (default depends on triple):"), 397 cl::init(EABI::Default), 398 cl::values( 399 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 400 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 401 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 402 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 403 CGBINDOPT(EABIVersion); 404 405 static cl::opt<DebuggerKind> DebuggerTuningOpt( 406 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 407 cl::init(DebuggerKind::Default), 408 cl::values( 409 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 410 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 411 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 412 CGBINDOPT(DebuggerTuningOpt); 413 414 static cl::opt<bool> EnableStackSizeSection( 415 "stack-size-section", 416 cl::desc("Emit a section containing stack size metadata"), 417 cl::init(false)); 418 CGBINDOPT(EnableStackSizeSection); 419 420 static cl::opt<bool> EnableAddrsig( 421 "addrsig", cl::desc("Emit an address-significance table"), 422 cl::init(false)); 423 CGBINDOPT(EnableAddrsig); 424 425 static cl::opt<bool> EmitCallSiteInfo( 426 "emit-call-site-info", 427 cl::desc( 428 "Emit call site debug information, if debug information is enabled."), 429 cl::init(false)); 430 CGBINDOPT(EmitCallSiteInfo); 431 432 static cl::opt<bool> EnableDebugEntryValues( 433 "debug-entry-values", 434 cl::desc("Enable debug info for the debug entry values."), 435 cl::init(false)); 436 CGBINDOPT(EnableDebugEntryValues); 437 438 static cl::opt<bool> PseudoProbeForProfiling( 439 "pseudo-probe-for-profiling", cl::desc("Emit pseudo probes for AutoFDO"), 440 cl::init(false)); 441 CGBINDOPT(PseudoProbeForProfiling); 442 443 static cl::opt<bool> ValueTrackingVariableLocations( 444 "experimental-debug-variable-locations", 445 cl::desc("Use experimental new value-tracking variable locations"), 446 cl::init(false)); 447 CGBINDOPT(ValueTrackingVariableLocations); 448 449 static cl::opt<bool> EnableMachineFunctionSplitter( 450 "split-machine-functions", 451 cl::desc("Split out cold basic blocks from machine functions based on " 452 "profile information"), 453 cl::init(false)); 454 CGBINDOPT(EnableMachineFunctionSplitter); 455 456 static cl::opt<bool> ForceDwarfFrameSection( 457 "force-dwarf-frame-section", 458 cl::desc("Always emit a debug frame section."), cl::init(false)); 459 CGBINDOPT(ForceDwarfFrameSection); 460 461 static cl::opt<bool> XRayOmitFunctionIndex( 462 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 463 cl::init(false)); 464 CGBINDOPT(XRayOmitFunctionIndex); 465 466 #undef CGBINDOPT 467 468 mc::RegisterMCTargetOptionsFlags(); 469 } 470 471 llvm::BasicBlockSection 472 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 473 if (getBBSections() == "all") 474 return BasicBlockSection::All; 475 else if (getBBSections() == "labels") 476 return BasicBlockSection::Labels; 477 else if (getBBSections() == "none") 478 return BasicBlockSection::None; 479 else { 480 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 481 MemoryBuffer::getFile(getBBSections()); 482 if (!MBOrErr) { 483 errs() << "Error loading basic block sections function list file: " 484 << MBOrErr.getError().message() << "\n"; 485 } else { 486 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 487 } 488 return BasicBlockSection::List; 489 } 490 } 491 492 llvm::StackProtectorGuards 493 codegen::getStackProtectorGuardMode(llvm::TargetOptions &Options) { 494 if (getStackProtectorGuard() == "tls") 495 return StackProtectorGuards::TLS; 496 if (getStackProtectorGuard() == "global") 497 return StackProtectorGuards::Global; 498 if (getStackProtectorGuard() != "none") { 499 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 500 MemoryBuffer::getFile(getStackProtectorGuard()); 501 if (!MBOrErr) 502 errs() << "error illegal stack protector guard mode: " 503 << MBOrErr.getError().message() << "\n"; 504 else 505 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 506 } 507 return StackProtectorGuards::None; 508 } 509 510 // Common utility function tightly tied to the options listed here. Initializes 511 // a TargetOptions object with CodeGen flags and returns it. 512 TargetOptions 513 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 514 TargetOptions Options; 515 Options.AllowFPOpFusion = getFuseFPOps(); 516 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 517 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 518 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 519 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 520 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 521 522 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 523 524 // FIXME: Should have separate input and output flags 525 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 526 527 Options.HonorSignDependentRoundingFPMathOption = 528 getEnableHonorSignDependentRoundingFPMath(); 529 if (getFloatABIForCalls() != FloatABI::Default) 530 Options.FloatABIType = getFloatABIForCalls(); 531 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 532 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 533 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 534 Options.StackAlignmentOverride = getOverrideStackAlignment(); 535 Options.StackSymbolOrdering = getStackSymbolOrdering(); 536 Options.UseInitArray = !getUseCtors(); 537 Options.RelaxELFRelocations = getRelaxELFRelocations(); 538 Options.DataSections = 539 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 540 Options.FunctionSections = getFunctionSections(); 541 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 542 Options.BBSections = getBBSectionsMode(Options); 543 Options.UniqueSectionNames = getUniqueSectionNames(); 544 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 545 Options.StackProtectorGuard = getStackProtectorGuardMode(Options); 546 Options.StackProtectorGuardOffset = getStackProtectorGuardOffset(); 547 Options.StackProtectorGuardReg = getStackProtectorGuardReg(); 548 Options.TLSSize = getTLSSize(); 549 Options.EmulatedTLS = getEmulatedTLS(); 550 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 551 Options.ExceptionModel = getExceptionModel(); 552 Options.EmitStackSizeSection = getEnableStackSizeSection(); 553 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 554 Options.EmitAddrsig = getEnableAddrsig(); 555 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 556 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 557 Options.PseudoProbeForProfiling = getPseudoProbeForProfiling(); 558 Options.ValueTrackingVariableLocations = getValueTrackingVariableLocations(); 559 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 560 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 561 562 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 563 564 Options.ThreadModel = getThreadModel(); 565 Options.EABIVersion = getEABIVersion(); 566 Options.DebuggerTuning = getDebuggerTuningOpt(); 567 568 return Options; 569 } 570 571 std::string codegen::getCPUStr() { 572 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 573 // this will set the CPU to an empty string which tells the target to 574 // pick a basic default. 575 if (getMCPU() == "native") 576 return std::string(sys::getHostCPUName()); 577 578 return getMCPU(); 579 } 580 581 std::string codegen::getFeaturesStr() { 582 SubtargetFeatures Features; 583 584 // If user asked for the 'native' CPU, we need to autodetect features. 585 // This is necessary for x86 where the CPU might not support all the 586 // features the autodetected CPU name lists in the target. For example, 587 // not all Sandybridge processors support AVX. 588 if (getMCPU() == "native") { 589 StringMap<bool> HostFeatures; 590 if (sys::getHostCPUFeatures(HostFeatures)) 591 for (auto &F : HostFeatures) 592 Features.AddFeature(F.first(), F.second); 593 } 594 595 for (auto const &MAttr : getMAttrs()) 596 Features.AddFeature(MAttr); 597 598 return Features.getString(); 599 } 600 601 std::vector<std::string> codegen::getFeatureList() { 602 SubtargetFeatures Features; 603 604 // If user asked for the 'native' CPU, we need to autodetect features. 605 // This is necessary for x86 where the CPU might not support all the 606 // features the autodetected CPU name lists in the target. For example, 607 // not all Sandybridge processors support AVX. 608 if (getMCPU() == "native") { 609 StringMap<bool> HostFeatures; 610 if (sys::getHostCPUFeatures(HostFeatures)) 611 for (auto &F : HostFeatures) 612 Features.AddFeature(F.first(), F.second); 613 } 614 615 for (auto const &MAttr : getMAttrs()) 616 Features.AddFeature(MAttr); 617 618 return Features.getFeatures(); 619 } 620 621 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 622 B.addAttribute(Name, Val ? "true" : "false"); 623 } 624 625 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 626 do { \ 627 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 628 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 629 } while (0) 630 631 /// Set function attributes of function \p F based on CPU, Features, and command 632 /// line flags. 633 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 634 Function &F) { 635 auto &Ctx = F.getContext(); 636 AttributeList Attrs = F.getAttributes(); 637 AttrBuilder NewAttrs; 638 639 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 640 NewAttrs.addAttribute("target-cpu", CPU); 641 if (!Features.empty()) { 642 // Append the command line features to any that are already on the function. 643 StringRef OldFeatures = 644 F.getFnAttribute("target-features").getValueAsString(); 645 if (OldFeatures.empty()) 646 NewAttrs.addAttribute("target-features", Features); 647 else { 648 SmallString<256> Appended(OldFeatures); 649 Appended.push_back(','); 650 Appended.append(Features); 651 NewAttrs.addAttribute("target-features", Appended); 652 } 653 } 654 if (FramePointerUsageView->getNumOccurrences() > 0 && 655 !F.hasFnAttribute("frame-pointer")) { 656 if (getFramePointerUsage() == FramePointer::All) 657 NewAttrs.addAttribute("frame-pointer", "all"); 658 else if (getFramePointerUsage() == FramePointer::NonLeaf) 659 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 660 else if (getFramePointerUsage() == FramePointer::None) 661 NewAttrs.addAttribute("frame-pointer", "none"); 662 } 663 if (DisableTailCallsView->getNumOccurrences() > 0) 664 NewAttrs.addAttribute("disable-tail-calls", 665 toStringRef(getDisableTailCalls())); 666 if (getStackRealign()) 667 NewAttrs.addAttribute("stackrealign"); 668 669 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 670 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 671 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 672 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 673 674 if (DenormalFPMathView->getNumOccurrences() > 0 && 675 !F.hasFnAttribute("denormal-fp-math")) { 676 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 677 678 // FIXME: Command line flag should expose separate input/output modes. 679 NewAttrs.addAttribute("denormal-fp-math", 680 DenormalMode(DenormKind, DenormKind).str()); 681 } 682 683 if (DenormalFP32MathView->getNumOccurrences() > 0 && 684 !F.hasFnAttribute("denormal-fp-math-f32")) { 685 // FIXME: Command line flag should expose separate input/output modes. 686 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 687 688 NewAttrs.addAttribute( 689 "denormal-fp-math-f32", 690 DenormalMode(DenormKind, DenormKind).str()); 691 } 692 693 if (TrapFuncNameView->getNumOccurrences() > 0) 694 for (auto &B : F) 695 for (auto &I : B) 696 if (auto *Call = dyn_cast<CallInst>(&I)) 697 if (const auto *F = Call->getCalledFunction()) 698 if (F->getIntrinsicID() == Intrinsic::debugtrap || 699 F->getIntrinsicID() == Intrinsic::trap) 700 Call->addAttribute( 701 AttributeList::FunctionIndex, 702 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 703 704 // Let NewAttrs override Attrs. 705 F.setAttributes( 706 Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); 707 } 708 709 /// Set function attributes of functions in Module M based on CPU, 710 /// Features, and command line flags. 711 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 712 Module &M) { 713 for (Function &F : M) 714 setFunctionAttributes(CPU, Features, F); 715 } 716