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(bool, XCOFFTracebackTable) 80 CGOPT(std::string, BBSections) 81 CGOPT(std::string, StackProtectorGuard) 82 CGOPT(unsigned, StackProtectorGuardOffset) 83 CGOPT(std::string, StackProtectorGuardReg) 84 CGOPT(unsigned, TLSSize) 85 CGOPT(bool, EmulatedTLS) 86 CGOPT(bool, UniqueSectionNames) 87 CGOPT(bool, UniqueBasicBlockSectionNames) 88 CGOPT(EABI, EABIVersion) 89 CGOPT(DebuggerKind, DebuggerTuningOpt) 90 CGOPT(bool, EnableStackSizeSection) 91 CGOPT(bool, EnableAddrsig) 92 CGOPT(bool, EmitCallSiteInfo) 93 CGOPT(bool, EnableMachineFunctionSplitter) 94 CGOPT(bool, EnableDebugEntryValues) 95 CGOPT(bool, PseudoProbeForProfiling) 96 CGOPT(bool, ValueTrackingVariableLocations) 97 CGOPT(bool, ForceDwarfFrameSection) 98 CGOPT(bool, XRayOmitFunctionIndex) 99 100 codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { 101 #define CGBINDOPT(NAME) \ 102 do { \ 103 NAME##View = std::addressof(NAME); \ 104 } while (0) 105 106 static cl::opt<std::string> MArch( 107 "march", cl::desc("Architecture to generate code for (see --version)")); 108 CGBINDOPT(MArch); 109 110 static cl::opt<std::string> MCPU( 111 "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"), 112 cl::value_desc("cpu-name"), cl::init("")); 113 CGBINDOPT(MCPU); 114 115 static cl::list<std::string> MAttrs( 116 "mattr", cl::CommaSeparated, 117 cl::desc("Target specific attributes (-mattr=help for details)"), 118 cl::value_desc("a1,+a2,-a3,...")); 119 CGBINDOPT(MAttrs); 120 121 static cl::opt<Reloc::Model> RelocModel( 122 "relocation-model", cl::desc("Choose relocation model"), 123 cl::values( 124 clEnumValN(Reloc::Static, "static", "Non-relocatable code"), 125 clEnumValN(Reloc::PIC_, "pic", 126 "Fully relocatable, position independent code"), 127 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 128 "Relocatable external references, non-relocatable code"), 129 clEnumValN( 130 Reloc::ROPI, "ropi", 131 "Code and read-only data relocatable, accessed PC-relative"), 132 clEnumValN( 133 Reloc::RWPI, "rwpi", 134 "Read-write data relocatable, accessed relative to static base"), 135 clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", 136 "Combination of ropi and rwpi"))); 137 CGBINDOPT(RelocModel); 138 139 static cl::opt<ThreadModel::Model> ThreadModel( 140 "thread-model", cl::desc("Choose threading model"), 141 cl::init(ThreadModel::POSIX), 142 cl::values( 143 clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"), 144 clEnumValN(ThreadModel::Single, "single", "Single thread model"))); 145 CGBINDOPT(ThreadModel); 146 147 static cl::opt<CodeModel::Model> CodeModel( 148 "code-model", cl::desc("Choose code model"), 149 cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"), 150 clEnumValN(CodeModel::Small, "small", "Small code model"), 151 clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"), 152 clEnumValN(CodeModel::Medium, "medium", "Medium code model"), 153 clEnumValN(CodeModel::Large, "large", "Large code model"))); 154 CGBINDOPT(CodeModel); 155 156 static cl::opt<ExceptionHandling> ExceptionModel( 157 "exception-model", cl::desc("exception model"), 158 cl::init(ExceptionHandling::None), 159 cl::values( 160 clEnumValN(ExceptionHandling::None, "default", 161 "default exception handling model"), 162 clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", 163 "DWARF-like CFI based exception handling"), 164 clEnumValN(ExceptionHandling::SjLj, "sjlj", 165 "SjLj exception handling"), 166 clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), 167 clEnumValN(ExceptionHandling::WinEH, "wineh", 168 "Windows exception model"), 169 clEnumValN(ExceptionHandling::Wasm, "wasm", 170 "WebAssembly exception handling"))); 171 CGBINDOPT(ExceptionModel); 172 173 static cl::opt<CodeGenFileType> FileType( 174 "filetype", cl::init(CGFT_AssemblyFile), 175 cl::desc( 176 "Choose a file type (not all types are supported by all targets):"), 177 cl::values( 178 clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"), 179 clEnumValN(CGFT_ObjectFile, "obj", 180 "Emit a native object ('.o') file"), 181 clEnumValN(CGFT_Null, "null", 182 "Emit nothing, for performance testing"))); 183 CGBINDOPT(FileType); 184 185 static cl::opt<FramePointer::FP> FramePointerUsage( 186 "frame-pointer", 187 cl::desc("Specify frame pointer elimination optimization"), 188 cl::init(FramePointer::None), 189 cl::values( 190 clEnumValN(FramePointer::All, "all", 191 "Disable frame pointer elimination"), 192 clEnumValN(FramePointer::NonLeaf, "non-leaf", 193 "Disable frame pointer elimination for non-leaf frame"), 194 clEnumValN(FramePointer::None, "none", 195 "Enable frame pointer elimination"))); 196 CGBINDOPT(FramePointerUsage); 197 198 static cl::opt<bool> EnableUnsafeFPMath( 199 "enable-unsafe-fp-math", 200 cl::desc("Enable optimizations that may decrease FP precision"), 201 cl::init(false)); 202 CGBINDOPT(EnableUnsafeFPMath); 203 204 static cl::opt<bool> EnableNoInfsFPMath( 205 "enable-no-infs-fp-math", 206 cl::desc("Enable FP math optimizations that assume no +-Infs"), 207 cl::init(false)); 208 CGBINDOPT(EnableNoInfsFPMath); 209 210 static cl::opt<bool> EnableNoNaNsFPMath( 211 "enable-no-nans-fp-math", 212 cl::desc("Enable FP math optimizations that assume no NaNs"), 213 cl::init(false)); 214 CGBINDOPT(EnableNoNaNsFPMath); 215 216 static cl::opt<bool> EnableNoSignedZerosFPMath( 217 "enable-no-signed-zeros-fp-math", 218 cl::desc("Enable FP math optimizations that assume " 219 "the sign of 0 is insignificant"), 220 cl::init(false)); 221 CGBINDOPT(EnableNoSignedZerosFPMath); 222 223 static cl::opt<bool> EnableNoTrappingFPMath( 224 "enable-no-trapping-fp-math", 225 cl::desc("Enable setting the FP exceptions build " 226 "attribute not to use exceptions"), 227 cl::init(false)); 228 CGBINDOPT(EnableNoTrappingFPMath); 229 230 static const auto DenormFlagEnumOptions = 231 cl::values(clEnumValN(DenormalMode::IEEE, "ieee", 232 "IEEE 754 denormal numbers"), 233 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 234 "the sign of a flushed-to-zero number is preserved " 235 "in the sign of 0"), 236 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 237 "denormals are flushed to positive zero")); 238 239 // FIXME: Doesn't have way to specify separate input and output modes. 240 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 241 "denormal-fp-math", 242 cl::desc("Select which denormal numbers the code is permitted to require"), 243 cl::init(DenormalMode::IEEE), 244 DenormFlagEnumOptions); 245 CGBINDOPT(DenormalFPMath); 246 247 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 248 "denormal-fp-math-f32", 249 cl::desc("Select which denormal numbers the code is permitted to require for float"), 250 cl::init(DenormalMode::Invalid), 251 DenormFlagEnumOptions); 252 CGBINDOPT(DenormalFP32Math); 253 254 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 255 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 256 cl::desc("Force codegen to assume rounding mode can change dynamically"), 257 cl::init(false)); 258 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 259 260 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 261 "float-abi", cl::desc("Choose float ABI type"), 262 cl::init(FloatABI::Default), 263 cl::values(clEnumValN(FloatABI::Default, "default", 264 "Target default float ABI type"), 265 clEnumValN(FloatABI::Soft, "soft", 266 "Soft float ABI (implied by -soft-float)"), 267 clEnumValN(FloatABI::Hard, "hard", 268 "Hard float ABI (uses FP registers)"))); 269 CGBINDOPT(FloatABIForCalls); 270 271 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 272 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 273 cl::init(FPOpFusion::Standard), 274 cl::values( 275 clEnumValN(FPOpFusion::Fast, "fast", 276 "Fuse FP ops whenever profitable"), 277 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 278 clEnumValN(FPOpFusion::Strict, "off", 279 "Only fuse FP ops when the result won't be affected."))); 280 CGBINDOPT(FuseFPOps); 281 282 static cl::opt<bool> DontPlaceZerosInBSS( 283 "nozero-initialized-in-bss", 284 cl::desc("Don't place zero-initialized symbols into bss section"), 285 cl::init(false)); 286 CGBINDOPT(DontPlaceZerosInBSS); 287 288 static cl::opt<bool> EnableAIXExtendedAltivecABI( 289 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 290 cl::init(false)); 291 CGBINDOPT(EnableAIXExtendedAltivecABI); 292 293 static cl::opt<bool> EnableGuaranteedTailCallOpt( 294 "tailcallopt", 295 cl::desc( 296 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 297 cl::init(false)); 298 CGBINDOPT(EnableGuaranteedTailCallOpt); 299 300 static cl::opt<bool> DisableTailCalls( 301 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 302 CGBINDOPT(DisableTailCalls); 303 304 static cl::opt<bool> StackSymbolOrdering( 305 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 306 cl::init(true)); 307 CGBINDOPT(StackSymbolOrdering); 308 309 static cl::opt<unsigned> OverrideStackAlignment( 310 "stack-alignment", cl::desc("Override default stack alignment"), 311 cl::init(0)); 312 CGBINDOPT(OverrideStackAlignment); 313 314 static cl::opt<bool> StackRealign( 315 "stackrealign", 316 cl::desc("Force align the stack to the minimum alignment"), 317 cl::init(false)); 318 CGBINDOPT(StackRealign); 319 320 static cl::opt<std::string> TrapFuncName( 321 "trap-func", cl::Hidden, 322 cl::desc("Emit a call to trap function rather than a trap instruction"), 323 cl::init("")); 324 CGBINDOPT(TrapFuncName); 325 326 static cl::opt<bool> UseCtors("use-ctors", 327 cl::desc("Use .ctors instead of .init_array."), 328 cl::init(false)); 329 CGBINDOPT(UseCtors); 330 331 static cl::opt<bool> RelaxELFRelocations( 332 "relax-elf-relocations", 333 cl::desc( 334 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 335 cl::init(false)); 336 CGBINDOPT(RelaxELFRelocations); 337 338 static cl::opt<bool> DataSections( 339 "data-sections", cl::desc("Emit data into separate sections"), 340 cl::init(false)); 341 CGBINDOPT(DataSections); 342 343 static cl::opt<bool> FunctionSections( 344 "function-sections", cl::desc("Emit functions into separate sections"), 345 cl::init(false)); 346 CGBINDOPT(FunctionSections); 347 348 static cl::opt<bool> IgnoreXCOFFVisibility( 349 "ignore-xcoff-visibility", 350 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 351 "all symbols 'unspecified' visibility in XCOFF object file"), 352 cl::init(false)); 353 CGBINDOPT(IgnoreXCOFFVisibility); 354 355 static cl::opt<bool> XCOFFTracebackTable( 356 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 357 cl::init(true)); 358 CGBINDOPT(XCOFFTracebackTable); 359 360 static cl::opt<std::string> BBSections( 361 "basic-block-sections", 362 cl::desc("Emit basic blocks into separate sections"), 363 cl::value_desc("all | <function list (file)> | labels | none"), 364 cl::init("none")); 365 CGBINDOPT(BBSections); 366 367 static cl::opt<std::string> StackProtectorGuard( 368 "stack-protector-guard", cl::desc("Stack protector guard mode"), 369 cl::init("none")); 370 CGBINDOPT(StackProtectorGuard); 371 372 static cl::opt<std::string> StackProtectorGuardReg( 373 "stack-protector-guard-reg", cl::desc("Stack protector guard register"), 374 cl::init("none")); 375 CGBINDOPT(StackProtectorGuardReg); 376 377 static cl::opt<unsigned> StackProtectorGuardOffset( 378 "stack-protector-guard-offset", cl::desc("Stack protector guard offset"), 379 cl::init((unsigned)-1)); 380 CGBINDOPT(StackProtectorGuardOffset); 381 382 static cl::opt<unsigned> TLSSize( 383 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 384 CGBINDOPT(TLSSize); 385 386 static cl::opt<bool> EmulatedTLS( 387 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 388 CGBINDOPT(EmulatedTLS); 389 390 static cl::opt<bool> UniqueSectionNames( 391 "unique-section-names", cl::desc("Give unique names to every section"), 392 cl::init(true)); 393 CGBINDOPT(UniqueSectionNames); 394 395 static cl::opt<bool> UniqueBasicBlockSectionNames( 396 "unique-basic-block-section-names", 397 cl::desc("Give unique names to every basic block section"), 398 cl::init(false)); 399 CGBINDOPT(UniqueBasicBlockSectionNames); 400 401 static cl::opt<EABI> EABIVersion( 402 "meabi", cl::desc("Set EABI type (default depends on triple):"), 403 cl::init(EABI::Default), 404 cl::values( 405 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 406 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 407 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 408 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 409 CGBINDOPT(EABIVersion); 410 411 static cl::opt<DebuggerKind> DebuggerTuningOpt( 412 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 413 cl::init(DebuggerKind::Default), 414 cl::values( 415 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 416 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 417 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 418 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 419 CGBINDOPT(DebuggerTuningOpt); 420 421 static cl::opt<bool> EnableStackSizeSection( 422 "stack-size-section", 423 cl::desc("Emit a section containing stack size metadata"), 424 cl::init(false)); 425 CGBINDOPT(EnableStackSizeSection); 426 427 static cl::opt<bool> EnableAddrsig( 428 "addrsig", cl::desc("Emit an address-significance table"), 429 cl::init(false)); 430 CGBINDOPT(EnableAddrsig); 431 432 static cl::opt<bool> EmitCallSiteInfo( 433 "emit-call-site-info", 434 cl::desc( 435 "Emit call site debug information, if debug information is enabled."), 436 cl::init(false)); 437 CGBINDOPT(EmitCallSiteInfo); 438 439 static cl::opt<bool> EnableDebugEntryValues( 440 "debug-entry-values", 441 cl::desc("Enable debug info for the debug entry values."), 442 cl::init(false)); 443 CGBINDOPT(EnableDebugEntryValues); 444 445 static cl::opt<bool> PseudoProbeForProfiling( 446 "pseudo-probe-for-profiling", cl::desc("Emit pseudo probes for AutoFDO"), 447 cl::init(false)); 448 CGBINDOPT(PseudoProbeForProfiling); 449 450 static cl::opt<bool> ValueTrackingVariableLocations( 451 "experimental-debug-variable-locations", 452 cl::desc("Use experimental new value-tracking variable locations"), 453 cl::init(false)); 454 CGBINDOPT(ValueTrackingVariableLocations); 455 456 static cl::opt<bool> EnableMachineFunctionSplitter( 457 "split-machine-functions", 458 cl::desc("Split out cold basic blocks from machine functions based on " 459 "profile information"), 460 cl::init(false)); 461 CGBINDOPT(EnableMachineFunctionSplitter); 462 463 static cl::opt<bool> ForceDwarfFrameSection( 464 "force-dwarf-frame-section", 465 cl::desc("Always emit a debug frame section."), cl::init(false)); 466 CGBINDOPT(ForceDwarfFrameSection); 467 468 static cl::opt<bool> XRayOmitFunctionIndex( 469 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 470 cl::init(false)); 471 CGBINDOPT(XRayOmitFunctionIndex); 472 473 #undef CGBINDOPT 474 475 mc::RegisterMCTargetOptionsFlags(); 476 } 477 478 llvm::BasicBlockSection 479 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 480 if (getBBSections() == "all") 481 return BasicBlockSection::All; 482 else if (getBBSections() == "labels") 483 return BasicBlockSection::Labels; 484 else if (getBBSections() == "none") 485 return BasicBlockSection::None; 486 else { 487 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 488 MemoryBuffer::getFile(getBBSections()); 489 if (!MBOrErr) { 490 errs() << "Error loading basic block sections function list file: " 491 << MBOrErr.getError().message() << "\n"; 492 } else { 493 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 494 } 495 return BasicBlockSection::List; 496 } 497 } 498 499 llvm::StackProtectorGuards 500 codegen::getStackProtectorGuardMode(llvm::TargetOptions &Options) { 501 if (getStackProtectorGuard() == "tls") 502 return StackProtectorGuards::TLS; 503 if (getStackProtectorGuard() == "global") 504 return StackProtectorGuards::Global; 505 if (getStackProtectorGuard() != "none") { 506 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 507 MemoryBuffer::getFile(getStackProtectorGuard()); 508 if (!MBOrErr) 509 errs() << "error illegal stack protector guard mode: " 510 << MBOrErr.getError().message() << "\n"; 511 else 512 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 513 } 514 return StackProtectorGuards::None; 515 } 516 517 // Common utility function tightly tied to the options listed here. Initializes 518 // a TargetOptions object with CodeGen flags and returns it. 519 TargetOptions 520 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 521 TargetOptions Options; 522 Options.AllowFPOpFusion = getFuseFPOps(); 523 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 524 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 525 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 526 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 527 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 528 529 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 530 531 // FIXME: Should have separate input and output flags 532 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 533 534 Options.HonorSignDependentRoundingFPMathOption = 535 getEnableHonorSignDependentRoundingFPMath(); 536 if (getFloatABIForCalls() != FloatABI::Default) 537 Options.FloatABIType = getFloatABIForCalls(); 538 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 539 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 540 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 541 Options.StackAlignmentOverride = getOverrideStackAlignment(); 542 Options.StackSymbolOrdering = getStackSymbolOrdering(); 543 Options.UseInitArray = !getUseCtors(); 544 Options.RelaxELFRelocations = getRelaxELFRelocations(); 545 Options.DataSections = 546 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 547 Options.FunctionSections = getFunctionSections(); 548 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 549 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 550 Options.BBSections = getBBSectionsMode(Options); 551 Options.UniqueSectionNames = getUniqueSectionNames(); 552 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 553 Options.StackProtectorGuard = getStackProtectorGuardMode(Options); 554 Options.StackProtectorGuardOffset = getStackProtectorGuardOffset(); 555 Options.StackProtectorGuardReg = getStackProtectorGuardReg(); 556 Options.TLSSize = getTLSSize(); 557 Options.EmulatedTLS = getEmulatedTLS(); 558 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 559 Options.ExceptionModel = getExceptionModel(); 560 Options.EmitStackSizeSection = getEnableStackSizeSection(); 561 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 562 Options.EmitAddrsig = getEnableAddrsig(); 563 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 564 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 565 Options.PseudoProbeForProfiling = getPseudoProbeForProfiling(); 566 Options.ValueTrackingVariableLocations = getValueTrackingVariableLocations(); 567 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 568 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 569 570 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 571 572 Options.ThreadModel = getThreadModel(); 573 Options.EABIVersion = getEABIVersion(); 574 Options.DebuggerTuning = getDebuggerTuningOpt(); 575 576 return Options; 577 } 578 579 std::string codegen::getCPUStr() { 580 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 581 // this will set the CPU to an empty string which tells the target to 582 // pick a basic default. 583 if (getMCPU() == "native") 584 return std::string(sys::getHostCPUName()); 585 586 return getMCPU(); 587 } 588 589 std::string codegen::getFeaturesStr() { 590 SubtargetFeatures Features; 591 592 // If user asked for the 'native' CPU, we need to autodetect features. 593 // This is necessary for x86 where the CPU might not support all the 594 // features the autodetected CPU name lists in the target. For example, 595 // not all Sandybridge processors support AVX. 596 if (getMCPU() == "native") { 597 StringMap<bool> HostFeatures; 598 if (sys::getHostCPUFeatures(HostFeatures)) 599 for (auto &F : HostFeatures) 600 Features.AddFeature(F.first(), F.second); 601 } 602 603 for (auto const &MAttr : getMAttrs()) 604 Features.AddFeature(MAttr); 605 606 return Features.getString(); 607 } 608 609 std::vector<std::string> codegen::getFeatureList() { 610 SubtargetFeatures Features; 611 612 // If user asked for the 'native' CPU, we need to autodetect features. 613 // This is necessary for x86 where the CPU might not support all the 614 // features the autodetected CPU name lists in the target. For example, 615 // not all Sandybridge processors support AVX. 616 if (getMCPU() == "native") { 617 StringMap<bool> HostFeatures; 618 if (sys::getHostCPUFeatures(HostFeatures)) 619 for (auto &F : HostFeatures) 620 Features.AddFeature(F.first(), F.second); 621 } 622 623 for (auto const &MAttr : getMAttrs()) 624 Features.AddFeature(MAttr); 625 626 return Features.getFeatures(); 627 } 628 629 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 630 B.addAttribute(Name, Val ? "true" : "false"); 631 } 632 633 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 634 do { \ 635 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 636 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 637 } while (0) 638 639 /// Set function attributes of function \p F based on CPU, Features, and command 640 /// line flags. 641 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 642 Function &F) { 643 auto &Ctx = F.getContext(); 644 AttributeList Attrs = F.getAttributes(); 645 AttrBuilder NewAttrs; 646 647 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 648 NewAttrs.addAttribute("target-cpu", CPU); 649 if (!Features.empty()) { 650 // Append the command line features to any that are already on the function. 651 StringRef OldFeatures = 652 F.getFnAttribute("target-features").getValueAsString(); 653 if (OldFeatures.empty()) 654 NewAttrs.addAttribute("target-features", Features); 655 else { 656 SmallString<256> Appended(OldFeatures); 657 Appended.push_back(','); 658 Appended.append(Features); 659 NewAttrs.addAttribute("target-features", Appended); 660 } 661 } 662 if (FramePointerUsageView->getNumOccurrences() > 0 && 663 !F.hasFnAttribute("frame-pointer")) { 664 if (getFramePointerUsage() == FramePointer::All) 665 NewAttrs.addAttribute("frame-pointer", "all"); 666 else if (getFramePointerUsage() == FramePointer::NonLeaf) 667 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 668 else if (getFramePointerUsage() == FramePointer::None) 669 NewAttrs.addAttribute("frame-pointer", "none"); 670 } 671 if (DisableTailCallsView->getNumOccurrences() > 0) 672 NewAttrs.addAttribute("disable-tail-calls", 673 toStringRef(getDisableTailCalls())); 674 if (getStackRealign()) 675 NewAttrs.addAttribute("stackrealign"); 676 677 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 678 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 679 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 680 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 681 682 if (DenormalFPMathView->getNumOccurrences() > 0 && 683 !F.hasFnAttribute("denormal-fp-math")) { 684 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 685 686 // FIXME: Command line flag should expose separate input/output modes. 687 NewAttrs.addAttribute("denormal-fp-math", 688 DenormalMode(DenormKind, DenormKind).str()); 689 } 690 691 if (DenormalFP32MathView->getNumOccurrences() > 0 && 692 !F.hasFnAttribute("denormal-fp-math-f32")) { 693 // FIXME: Command line flag should expose separate input/output modes. 694 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 695 696 NewAttrs.addAttribute( 697 "denormal-fp-math-f32", 698 DenormalMode(DenormKind, DenormKind).str()); 699 } 700 701 if (TrapFuncNameView->getNumOccurrences() > 0) 702 for (auto &B : F) 703 for (auto &I : B) 704 if (auto *Call = dyn_cast<CallInst>(&I)) 705 if (const auto *F = Call->getCalledFunction()) 706 if (F->getIntrinsicID() == Intrinsic::debugtrap || 707 F->getIntrinsicID() == Intrinsic::trap) 708 Call->addAttribute( 709 AttributeList::FunctionIndex, 710 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 711 712 // Let NewAttrs override Attrs. 713 F.setAttributes( 714 Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); 715 } 716 717 /// Set function attributes of functions in Module M based on CPU, 718 /// Features, and command line flags. 719 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 720 Module &M) { 721 for (Function &F : M) 722 setFunctionAttributes(CPU, Features, F); 723 } 724