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 #include "llvm/Support/MemoryBuffer.h" 21 22 using namespace llvm; 23 24 #define CGOPT(TY, NAME) \ 25 static cl::opt<TY> *NAME##View; \ 26 TY codegen::get##NAME() { \ 27 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 28 return *NAME##View; \ 29 } 30 31 #define CGLIST(TY, NAME) \ 32 static cl::list<TY> *NAME##View; \ 33 std::vector<TY> codegen::get##NAME() { \ 34 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 35 return *NAME##View; \ 36 } 37 38 #define CGOPT_EXP(TY, NAME) \ 39 CGOPT(TY, NAME) \ 40 Optional<TY> codegen::getExplicit##NAME() { \ 41 if (NAME##View->getNumOccurrences()) { \ 42 TY res = *NAME##View; \ 43 return res; \ 44 } \ 45 return None; \ 46 } 47 48 CGOPT(std::string, MArch) 49 CGOPT(std::string, MCPU) 50 CGLIST(std::string, MAttrs) 51 CGOPT_EXP(Reloc::Model, RelocModel) 52 CGOPT(ThreadModel::Model, ThreadModel) 53 CGOPT_EXP(CodeModel::Model, CodeModel) 54 CGOPT(ExceptionHandling, ExceptionModel) 55 CGOPT_EXP(CodeGenFileType, FileType) 56 CGOPT(FramePointerKind, FramePointerUsage) 57 CGOPT(bool, EnableUnsafeFPMath) 58 CGOPT(bool, EnableNoInfsFPMath) 59 CGOPT(bool, EnableNoNaNsFPMath) 60 CGOPT(bool, EnableNoSignedZerosFPMath) 61 CGOPT(bool, EnableNoTrappingFPMath) 62 CGOPT(bool, EnableAIXExtendedAltivecABI) 63 CGOPT(DenormalMode::DenormalModeKind, DenormalFPMath) 64 CGOPT(DenormalMode::DenormalModeKind, DenormalFP32Math) 65 CGOPT(bool, EnableHonorSignDependentRoundingFPMath) 66 CGOPT(FloatABI::ABIType, FloatABIForCalls) 67 CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) 68 CGOPT(bool, DontPlaceZerosInBSS) 69 CGOPT(bool, EnableGuaranteedTailCallOpt) 70 CGOPT(bool, DisableTailCalls) 71 CGOPT(bool, StackSymbolOrdering) 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(unsigned, TLSSize) 82 CGOPT(bool, EmulatedTLS) 83 CGOPT(bool, UniqueSectionNames) 84 CGOPT(bool, UniqueBasicBlockSectionNames) 85 CGOPT(EABI, EABIVersion) 86 CGOPT(DebuggerKind, DebuggerTuningOpt) 87 CGOPT(bool, EnableStackSizeSection) 88 CGOPT(bool, EnableAddrsig) 89 CGOPT(bool, EmitCallSiteInfo) 90 CGOPT(bool, EnableMachineFunctionSplitter) 91 CGOPT(bool, EnableDebugEntryValues) 92 CGOPT(bool, PseudoProbeForProfiling) 93 CGOPT(bool, ValueTrackingVariableLocations) 94 CGOPT(bool, ForceDwarfFrameSection) 95 CGOPT(bool, XRayOmitFunctionIndex) 96 CGOPT(bool, DebugStrictDwarf) 97 CGOPT(unsigned, AlignLoops) 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<FramePointerKind> FramePointerUsage( 185 "frame-pointer", 186 cl::desc("Specify frame pointer elimination optimization"), 187 cl::init(FramePointerKind::None), 188 cl::values( 189 clEnumValN(FramePointerKind::All, "all", 190 "Disable frame pointer elimination"), 191 clEnumValN(FramePointerKind::NonLeaf, "non-leaf", 192 "Disable frame pointer elimination for non-leaf frame"), 193 clEnumValN(FramePointerKind::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<bool> StackRealign( 309 "stackrealign", 310 cl::desc("Force align the stack to the minimum alignment"), 311 cl::init(false)); 312 CGBINDOPT(StackRealign); 313 314 static cl::opt<std::string> TrapFuncName( 315 "trap-func", cl::Hidden, 316 cl::desc("Emit a call to trap function rather than a trap instruction"), 317 cl::init("")); 318 CGBINDOPT(TrapFuncName); 319 320 static cl::opt<bool> UseCtors("use-ctors", 321 cl::desc("Use .ctors instead of .init_array."), 322 cl::init(false)); 323 CGBINDOPT(UseCtors); 324 325 static cl::opt<bool> RelaxELFRelocations( 326 "relax-elf-relocations", 327 cl::desc( 328 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 329 cl::init(false)); 330 CGBINDOPT(RelaxELFRelocations); 331 332 static cl::opt<bool> DataSections( 333 "data-sections", cl::desc("Emit data into separate sections"), 334 cl::init(false)); 335 CGBINDOPT(DataSections); 336 337 static cl::opt<bool> FunctionSections( 338 "function-sections", cl::desc("Emit functions into separate sections"), 339 cl::init(false)); 340 CGBINDOPT(FunctionSections); 341 342 static cl::opt<bool> IgnoreXCOFFVisibility( 343 "ignore-xcoff-visibility", 344 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 345 "all symbols 'unspecified' visibility in XCOFF object file"), 346 cl::init(false)); 347 CGBINDOPT(IgnoreXCOFFVisibility); 348 349 static cl::opt<bool> XCOFFTracebackTable( 350 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 351 cl::init(true)); 352 CGBINDOPT(XCOFFTracebackTable); 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<unsigned> TLSSize( 362 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 363 CGBINDOPT(TLSSize); 364 365 static cl::opt<bool> EmulatedTLS( 366 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 367 CGBINDOPT(EmulatedTLS); 368 369 static cl::opt<bool> UniqueSectionNames( 370 "unique-section-names", cl::desc("Give unique names to every section"), 371 cl::init(true)); 372 CGBINDOPT(UniqueSectionNames); 373 374 static cl::opt<bool> UniqueBasicBlockSectionNames( 375 "unique-basic-block-section-names", 376 cl::desc("Give unique names to every basic block section"), 377 cl::init(false)); 378 CGBINDOPT(UniqueBasicBlockSectionNames); 379 380 static cl::opt<EABI> EABIVersion( 381 "meabi", cl::desc("Set EABI type (default depends on triple):"), 382 cl::init(EABI::Default), 383 cl::values( 384 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 385 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 386 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 387 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 388 CGBINDOPT(EABIVersion); 389 390 static cl::opt<DebuggerKind> DebuggerTuningOpt( 391 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 392 cl::init(DebuggerKind::Default), 393 cl::values( 394 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 395 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 396 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 397 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 398 CGBINDOPT(DebuggerTuningOpt); 399 400 static cl::opt<bool> EnableStackSizeSection( 401 "stack-size-section", 402 cl::desc("Emit a section containing stack size metadata"), 403 cl::init(false)); 404 CGBINDOPT(EnableStackSizeSection); 405 406 static cl::opt<bool> EnableAddrsig( 407 "addrsig", cl::desc("Emit an address-significance table"), 408 cl::init(false)); 409 CGBINDOPT(EnableAddrsig); 410 411 static cl::opt<bool> EmitCallSiteInfo( 412 "emit-call-site-info", 413 cl::desc( 414 "Emit call site debug information, if debug information is enabled."), 415 cl::init(false)); 416 CGBINDOPT(EmitCallSiteInfo); 417 418 static cl::opt<bool> EnableDebugEntryValues( 419 "debug-entry-values", 420 cl::desc("Enable debug info for the debug entry values."), 421 cl::init(false)); 422 CGBINDOPT(EnableDebugEntryValues); 423 424 static cl::opt<bool> PseudoProbeForProfiling( 425 "pseudo-probe-for-profiling", cl::desc("Emit pseudo probes for AutoFDO"), 426 cl::init(false)); 427 CGBINDOPT(PseudoProbeForProfiling); 428 429 static cl::opt<bool> ValueTrackingVariableLocations( 430 "experimental-debug-variable-locations", 431 cl::desc("Use experimental new value-tracking variable locations"), 432 cl::init(false)); 433 CGBINDOPT(ValueTrackingVariableLocations); 434 435 static cl::opt<bool> EnableMachineFunctionSplitter( 436 "split-machine-functions", 437 cl::desc("Split out cold basic blocks from machine functions based on " 438 "profile information"), 439 cl::init(false)); 440 CGBINDOPT(EnableMachineFunctionSplitter); 441 442 static cl::opt<bool> ForceDwarfFrameSection( 443 "force-dwarf-frame-section", 444 cl::desc("Always emit a debug frame section."), cl::init(false)); 445 CGBINDOPT(ForceDwarfFrameSection); 446 447 static cl::opt<bool> XRayOmitFunctionIndex( 448 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 449 cl::init(false)); 450 CGBINDOPT(XRayOmitFunctionIndex); 451 452 static cl::opt<bool> DebugStrictDwarf( 453 "strict-dwarf", cl::desc("use strict dwarf"), cl::init(false)); 454 CGBINDOPT(DebugStrictDwarf); 455 456 static cl::opt<unsigned> AlignLoops("align-loops", 457 cl::desc("Default alignment for loops")); 458 CGBINDOPT(AlignLoops); 459 460 #undef CGBINDOPT 461 462 mc::RegisterMCTargetOptionsFlags(); 463 } 464 465 llvm::BasicBlockSection 466 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 467 if (getBBSections() == "all") 468 return BasicBlockSection::All; 469 else if (getBBSections() == "labels") 470 return BasicBlockSection::Labels; 471 else if (getBBSections() == "none") 472 return BasicBlockSection::None; 473 else { 474 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 475 MemoryBuffer::getFile(getBBSections()); 476 if (!MBOrErr) { 477 errs() << "Error loading basic block sections function list file: " 478 << MBOrErr.getError().message() << "\n"; 479 } else { 480 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 481 } 482 return BasicBlockSection::List; 483 } 484 } 485 486 // Common utility function tightly tied to the options listed here. Initializes 487 // a TargetOptions object with CodeGen flags and returns it. 488 TargetOptions 489 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 490 TargetOptions Options; 491 Options.AllowFPOpFusion = getFuseFPOps(); 492 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 493 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 494 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 495 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 496 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 497 498 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 499 500 // FIXME: Should have separate input and output flags 501 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 502 503 Options.HonorSignDependentRoundingFPMathOption = 504 getEnableHonorSignDependentRoundingFPMath(); 505 if (getFloatABIForCalls() != FloatABI::Default) 506 Options.FloatABIType = getFloatABIForCalls(); 507 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 508 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 509 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 510 Options.StackSymbolOrdering = getStackSymbolOrdering(); 511 Options.UseInitArray = !getUseCtors(); 512 Options.RelaxELFRelocations = getRelaxELFRelocations(); 513 Options.DataSections = 514 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 515 Options.FunctionSections = getFunctionSections(); 516 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 517 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 518 Options.BBSections = getBBSectionsMode(Options); 519 Options.UniqueSectionNames = getUniqueSectionNames(); 520 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 521 Options.TLSSize = getTLSSize(); 522 Options.EmulatedTLS = getEmulatedTLS(); 523 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 524 Options.ExceptionModel = getExceptionModel(); 525 Options.EmitStackSizeSection = getEnableStackSizeSection(); 526 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 527 Options.EmitAddrsig = getEnableAddrsig(); 528 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 529 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 530 Options.PseudoProbeForProfiling = getPseudoProbeForProfiling(); 531 Options.ValueTrackingVariableLocations = getValueTrackingVariableLocations(); 532 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 533 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 534 Options.DebugStrictDwarf = getDebugStrictDwarf(); 535 Options.LoopAlignment = getAlignLoops(); 536 537 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 538 539 Options.ThreadModel = getThreadModel(); 540 Options.EABIVersion = getEABIVersion(); 541 Options.DebuggerTuning = getDebuggerTuningOpt(); 542 543 return Options; 544 } 545 546 std::string codegen::getCPUStr() { 547 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 548 // this will set the CPU to an empty string which tells the target to 549 // pick a basic default. 550 if (getMCPU() == "native") 551 return std::string(sys::getHostCPUName()); 552 553 return getMCPU(); 554 } 555 556 std::string codegen::getFeaturesStr() { 557 SubtargetFeatures Features; 558 559 // If user asked for the 'native' CPU, we need to autodetect features. 560 // This is necessary for x86 where the CPU might not support all the 561 // features the autodetected CPU name lists in the target. For example, 562 // not all Sandybridge processors support AVX. 563 if (getMCPU() == "native") { 564 StringMap<bool> HostFeatures; 565 if (sys::getHostCPUFeatures(HostFeatures)) 566 for (auto &F : HostFeatures) 567 Features.AddFeature(F.first(), F.second); 568 } 569 570 for (auto const &MAttr : getMAttrs()) 571 Features.AddFeature(MAttr); 572 573 return Features.getString(); 574 } 575 576 std::vector<std::string> codegen::getFeatureList() { 577 SubtargetFeatures Features; 578 579 // If user asked for the 'native' CPU, we need to autodetect features. 580 // This is necessary for x86 where the CPU might not support all the 581 // features the autodetected CPU name lists in the target. For example, 582 // not all Sandybridge processors support AVX. 583 if (getMCPU() == "native") { 584 StringMap<bool> HostFeatures; 585 if (sys::getHostCPUFeatures(HostFeatures)) 586 for (auto &F : HostFeatures) 587 Features.AddFeature(F.first(), F.second); 588 } 589 590 for (auto const &MAttr : getMAttrs()) 591 Features.AddFeature(MAttr); 592 593 return Features.getFeatures(); 594 } 595 596 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 597 B.addAttribute(Name, Val ? "true" : "false"); 598 } 599 600 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 601 do { \ 602 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 603 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 604 } while (0) 605 606 /// Set function attributes of function \p F based on CPU, Features, and command 607 /// line flags. 608 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 609 Function &F) { 610 auto &Ctx = F.getContext(); 611 AttributeList Attrs = F.getAttributes(); 612 AttrBuilder NewAttrs; 613 614 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 615 NewAttrs.addAttribute("target-cpu", CPU); 616 if (!Features.empty()) { 617 // Append the command line features to any that are already on the function. 618 StringRef OldFeatures = 619 F.getFnAttribute("target-features").getValueAsString(); 620 if (OldFeatures.empty()) 621 NewAttrs.addAttribute("target-features", Features); 622 else { 623 SmallString<256> Appended(OldFeatures); 624 Appended.push_back(','); 625 Appended.append(Features); 626 NewAttrs.addAttribute("target-features", Appended); 627 } 628 } 629 if (FramePointerUsageView->getNumOccurrences() > 0 && 630 !F.hasFnAttribute("frame-pointer")) { 631 if (getFramePointerUsage() == FramePointerKind::All) 632 NewAttrs.addAttribute("frame-pointer", "all"); 633 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 634 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 635 else if (getFramePointerUsage() == FramePointerKind::None) 636 NewAttrs.addAttribute("frame-pointer", "none"); 637 } 638 if (DisableTailCallsView->getNumOccurrences() > 0) 639 NewAttrs.addAttribute("disable-tail-calls", 640 toStringRef(getDisableTailCalls())); 641 if (getStackRealign()) 642 NewAttrs.addAttribute("stackrealign"); 643 644 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 645 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 646 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 647 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 648 649 if (DenormalFPMathView->getNumOccurrences() > 0 && 650 !F.hasFnAttribute("denormal-fp-math")) { 651 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 652 653 // FIXME: Command line flag should expose separate input/output modes. 654 NewAttrs.addAttribute("denormal-fp-math", 655 DenormalMode(DenormKind, DenormKind).str()); 656 } 657 658 if (DenormalFP32MathView->getNumOccurrences() > 0 && 659 !F.hasFnAttribute("denormal-fp-math-f32")) { 660 // FIXME: Command line flag should expose separate input/output modes. 661 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 662 663 NewAttrs.addAttribute( 664 "denormal-fp-math-f32", 665 DenormalMode(DenormKind, DenormKind).str()); 666 } 667 668 if (TrapFuncNameView->getNumOccurrences() > 0) 669 for (auto &B : F) 670 for (auto &I : B) 671 if (auto *Call = dyn_cast<CallInst>(&I)) 672 if (const auto *F = Call->getCalledFunction()) 673 if (F->getIntrinsicID() == Intrinsic::debugtrap || 674 F->getIntrinsicID() == Intrinsic::trap) 675 Call->addAttribute( 676 AttributeList::FunctionIndex, 677 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 678 679 // Let NewAttrs override Attrs. 680 F.setAttributes( 681 Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); 682 } 683 684 /// Set function attributes of functions in Module M based on CPU, 685 /// Features, and command line flags. 686 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 687 Module &M) { 688 for (Function &F : M) 689 setFunctionAttributes(CPU, Features, F); 690 } 691