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(unsigned, OverrideStackAlignment) 73 CGOPT(bool, StackRealign) 74 CGOPT(std::string, TrapFuncName) 75 CGOPT(bool, UseCtors) 76 CGOPT(bool, RelaxELFRelocations) 77 CGOPT_EXP(bool, DataSections) 78 CGOPT_EXP(bool, FunctionSections) 79 CGOPT(bool, IgnoreXCOFFVisibility) 80 CGOPT(bool, XCOFFTracebackTable) 81 CGOPT(std::string, BBSections) 82 CGOPT(unsigned, TLSSize) 83 CGOPT(bool, EmulatedTLS) 84 CGOPT(bool, UniqueSectionNames) 85 CGOPT(bool, UniqueBasicBlockSectionNames) 86 CGOPT(EABI, EABIVersion) 87 CGOPT(DebuggerKind, DebuggerTuningOpt) 88 CGOPT(bool, EnableStackSizeSection) 89 CGOPT(bool, EnableAddrsig) 90 CGOPT(bool, EmitCallSiteInfo) 91 CGOPT(bool, EnableMachineFunctionSplitter) 92 CGOPT(bool, EnableDebugEntryValues) 93 CGOPT(bool, PseudoProbeForProfiling) 94 CGOPT(bool, ValueTrackingVariableLocations) 95 CGOPT(bool, ForceDwarfFrameSection) 96 CGOPT(bool, XRayOmitFunctionIndex) 97 CGOPT(bool, DebugStrictDwarf) 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<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<bool> XCOFFTracebackTable( 355 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 356 cl::init(true)); 357 CGBINDOPT(XCOFFTracebackTable); 358 359 static cl::opt<std::string> BBSections( 360 "basic-block-sections", 361 cl::desc("Emit basic blocks into separate sections"), 362 cl::value_desc("all | <function list (file)> | labels | none"), 363 cl::init("none")); 364 CGBINDOPT(BBSections); 365 366 static cl::opt<unsigned> TLSSize( 367 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 368 CGBINDOPT(TLSSize); 369 370 static cl::opt<bool> EmulatedTLS( 371 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 372 CGBINDOPT(EmulatedTLS); 373 374 static cl::opt<bool> UniqueSectionNames( 375 "unique-section-names", cl::desc("Give unique names to every section"), 376 cl::init(true)); 377 CGBINDOPT(UniqueSectionNames); 378 379 static cl::opt<bool> UniqueBasicBlockSectionNames( 380 "unique-basic-block-section-names", 381 cl::desc("Give unique names to every basic block section"), 382 cl::init(false)); 383 CGBINDOPT(UniqueBasicBlockSectionNames); 384 385 static cl::opt<EABI> EABIVersion( 386 "meabi", cl::desc("Set EABI type (default depends on triple):"), 387 cl::init(EABI::Default), 388 cl::values( 389 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 390 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 391 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 392 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 393 CGBINDOPT(EABIVersion); 394 395 static cl::opt<DebuggerKind> DebuggerTuningOpt( 396 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 397 cl::init(DebuggerKind::Default), 398 cl::values( 399 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 400 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 401 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 402 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 403 CGBINDOPT(DebuggerTuningOpt); 404 405 static cl::opt<bool> EnableStackSizeSection( 406 "stack-size-section", 407 cl::desc("Emit a section containing stack size metadata"), 408 cl::init(false)); 409 CGBINDOPT(EnableStackSizeSection); 410 411 static cl::opt<bool> EnableAddrsig( 412 "addrsig", cl::desc("Emit an address-significance table"), 413 cl::init(false)); 414 CGBINDOPT(EnableAddrsig); 415 416 static cl::opt<bool> EmitCallSiteInfo( 417 "emit-call-site-info", 418 cl::desc( 419 "Emit call site debug information, if debug information is enabled."), 420 cl::init(false)); 421 CGBINDOPT(EmitCallSiteInfo); 422 423 static cl::opt<bool> EnableDebugEntryValues( 424 "debug-entry-values", 425 cl::desc("Enable debug info for the debug entry values."), 426 cl::init(false)); 427 CGBINDOPT(EnableDebugEntryValues); 428 429 static cl::opt<bool> PseudoProbeForProfiling( 430 "pseudo-probe-for-profiling", cl::desc("Emit pseudo probes for AutoFDO"), 431 cl::init(false)); 432 CGBINDOPT(PseudoProbeForProfiling); 433 434 static cl::opt<bool> ValueTrackingVariableLocations( 435 "experimental-debug-variable-locations", 436 cl::desc("Use experimental new value-tracking variable locations"), 437 cl::init(false)); 438 CGBINDOPT(ValueTrackingVariableLocations); 439 440 static cl::opt<bool> EnableMachineFunctionSplitter( 441 "split-machine-functions", 442 cl::desc("Split out cold basic blocks from machine functions based on " 443 "profile information"), 444 cl::init(false)); 445 CGBINDOPT(EnableMachineFunctionSplitter); 446 447 static cl::opt<bool> ForceDwarfFrameSection( 448 "force-dwarf-frame-section", 449 cl::desc("Always emit a debug frame section."), cl::init(false)); 450 CGBINDOPT(ForceDwarfFrameSection); 451 452 static cl::opt<bool> XRayOmitFunctionIndex( 453 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 454 cl::init(false)); 455 CGBINDOPT(XRayOmitFunctionIndex); 456 457 static cl::opt<bool> DebugStrictDwarf( 458 "strict-dwarf", cl::desc("use strict dwarf"), cl::init(false)); 459 CGBINDOPT(DebugStrictDwarf); 460 461 #undef CGBINDOPT 462 463 mc::RegisterMCTargetOptionsFlags(); 464 } 465 466 llvm::BasicBlockSection 467 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 468 if (getBBSections() == "all") 469 return BasicBlockSection::All; 470 else if (getBBSections() == "labels") 471 return BasicBlockSection::Labels; 472 else if (getBBSections() == "none") 473 return BasicBlockSection::None; 474 else { 475 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 476 MemoryBuffer::getFile(getBBSections()); 477 if (!MBOrErr) { 478 errs() << "Error loading basic block sections function list file: " 479 << MBOrErr.getError().message() << "\n"; 480 } else { 481 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 482 } 483 return BasicBlockSection::List; 484 } 485 } 486 487 // Common utility function tightly tied to the options listed here. Initializes 488 // a TargetOptions object with CodeGen flags and returns it. 489 TargetOptions 490 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 491 TargetOptions Options; 492 Options.AllowFPOpFusion = getFuseFPOps(); 493 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 494 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 495 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 496 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 497 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 498 499 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 500 501 // FIXME: Should have separate input and output flags 502 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 503 504 Options.HonorSignDependentRoundingFPMathOption = 505 getEnableHonorSignDependentRoundingFPMath(); 506 if (getFloatABIForCalls() != FloatABI::Default) 507 Options.FloatABIType = getFloatABIForCalls(); 508 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 509 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 510 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 511 Options.StackAlignmentOverride = getOverrideStackAlignment(); 512 Options.StackSymbolOrdering = getStackSymbolOrdering(); 513 Options.UseInitArray = !getUseCtors(); 514 Options.RelaxELFRelocations = getRelaxELFRelocations(); 515 Options.DataSections = 516 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 517 Options.FunctionSections = getFunctionSections(); 518 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 519 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 520 Options.BBSections = getBBSectionsMode(Options); 521 Options.UniqueSectionNames = getUniqueSectionNames(); 522 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 523 Options.TLSSize = getTLSSize(); 524 Options.EmulatedTLS = getEmulatedTLS(); 525 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 526 Options.ExceptionModel = getExceptionModel(); 527 Options.EmitStackSizeSection = getEnableStackSizeSection(); 528 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 529 Options.EmitAddrsig = getEnableAddrsig(); 530 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 531 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 532 Options.PseudoProbeForProfiling = getPseudoProbeForProfiling(); 533 Options.ValueTrackingVariableLocations = getValueTrackingVariableLocations(); 534 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 535 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 536 Options.DebugStrictDwarf = getDebugStrictDwarf(); 537 538 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 539 540 Options.ThreadModel = getThreadModel(); 541 Options.EABIVersion = getEABIVersion(); 542 Options.DebuggerTuning = getDebuggerTuningOpt(); 543 544 return Options; 545 } 546 547 std::string codegen::getCPUStr() { 548 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 549 // this will set the CPU to an empty string which tells the target to 550 // pick a basic default. 551 if (getMCPU() == "native") 552 return std::string(sys::getHostCPUName()); 553 554 return getMCPU(); 555 } 556 557 std::string codegen::getFeaturesStr() { 558 SubtargetFeatures Features; 559 560 // If user asked for the 'native' CPU, we need to autodetect features. 561 // This is necessary for x86 where the CPU might not support all the 562 // features the autodetected CPU name lists in the target. For example, 563 // not all Sandybridge processors support AVX. 564 if (getMCPU() == "native") { 565 StringMap<bool> HostFeatures; 566 if (sys::getHostCPUFeatures(HostFeatures)) 567 for (auto &F : HostFeatures) 568 Features.AddFeature(F.first(), F.second); 569 } 570 571 for (auto const &MAttr : getMAttrs()) 572 Features.AddFeature(MAttr); 573 574 return Features.getString(); 575 } 576 577 std::vector<std::string> codegen::getFeatureList() { 578 SubtargetFeatures Features; 579 580 // If user asked for the 'native' CPU, we need to autodetect features. 581 // This is necessary for x86 where the CPU might not support all the 582 // features the autodetected CPU name lists in the target. For example, 583 // not all Sandybridge processors support AVX. 584 if (getMCPU() == "native") { 585 StringMap<bool> HostFeatures; 586 if (sys::getHostCPUFeatures(HostFeatures)) 587 for (auto &F : HostFeatures) 588 Features.AddFeature(F.first(), F.second); 589 } 590 591 for (auto const &MAttr : getMAttrs()) 592 Features.AddFeature(MAttr); 593 594 return Features.getFeatures(); 595 } 596 597 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 598 B.addAttribute(Name, Val ? "true" : "false"); 599 } 600 601 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 602 do { \ 603 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 604 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 605 } while (0) 606 607 /// Set function attributes of function \p F based on CPU, Features, and command 608 /// line flags. 609 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 610 Function &F) { 611 auto &Ctx = F.getContext(); 612 AttributeList Attrs = F.getAttributes(); 613 AttrBuilder NewAttrs; 614 615 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 616 NewAttrs.addAttribute("target-cpu", CPU); 617 if (!Features.empty()) { 618 // Append the command line features to any that are already on the function. 619 StringRef OldFeatures = 620 F.getFnAttribute("target-features").getValueAsString(); 621 if (OldFeatures.empty()) 622 NewAttrs.addAttribute("target-features", Features); 623 else { 624 SmallString<256> Appended(OldFeatures); 625 Appended.push_back(','); 626 Appended.append(Features); 627 NewAttrs.addAttribute("target-features", Appended); 628 } 629 } 630 if (FramePointerUsageView->getNumOccurrences() > 0 && 631 !F.hasFnAttribute("frame-pointer")) { 632 if (getFramePointerUsage() == FramePointerKind::All) 633 NewAttrs.addAttribute("frame-pointer", "all"); 634 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 635 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 636 else if (getFramePointerUsage() == FramePointerKind::None) 637 NewAttrs.addAttribute("frame-pointer", "none"); 638 } 639 if (DisableTailCallsView->getNumOccurrences() > 0) 640 NewAttrs.addAttribute("disable-tail-calls", 641 toStringRef(getDisableTailCalls())); 642 if (getStackRealign()) 643 NewAttrs.addAttribute("stackrealign"); 644 645 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 646 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 647 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 648 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 649 650 if (DenormalFPMathView->getNumOccurrences() > 0 && 651 !F.hasFnAttribute("denormal-fp-math")) { 652 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 653 654 // FIXME: Command line flag should expose separate input/output modes. 655 NewAttrs.addAttribute("denormal-fp-math", 656 DenormalMode(DenormKind, DenormKind).str()); 657 } 658 659 if (DenormalFP32MathView->getNumOccurrences() > 0 && 660 !F.hasFnAttribute("denormal-fp-math-f32")) { 661 // FIXME: Command line flag should expose separate input/output modes. 662 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 663 664 NewAttrs.addAttribute( 665 "denormal-fp-math-f32", 666 DenormalMode(DenormKind, DenormKind).str()); 667 } 668 669 if (TrapFuncNameView->getNumOccurrences() > 0) 670 for (auto &B : F) 671 for (auto &I : B) 672 if (auto *Call = dyn_cast<CallInst>(&I)) 673 if (const auto *F = Call->getCalledFunction()) 674 if (F->getIntrinsicID() == Intrinsic::debugtrap || 675 F->getIntrinsicID() == Intrinsic::trap) 676 Call->addAttribute( 677 AttributeList::FunctionIndex, 678 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 679 680 // Let NewAttrs override Attrs. 681 F.setAttributes( 682 Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); 683 } 684 685 /// Set function attributes of functions in Module M based on CPU, 686 /// Features, and command line flags. 687 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 688 Module &M) { 689 for (Function &F : M) 690 setFunctionAttributes(CPU, Features, F); 691 } 692
Indexes created Tue Jun 16 00:25:01 UTC 2026