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(SwiftAsyncFramePointerMode, SwiftAsyncFramePointer) 69 CGOPT(bool, DontPlaceZerosInBSS) 70 CGOPT(bool, EnableGuaranteedTailCallOpt) 71 CGOPT(bool, DisableTailCalls) 72 CGOPT(bool, StackSymbolOrdering) 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, ForceDwarfFrameSection) 94 CGOPT(bool, XRayOmitFunctionIndex) 95 CGOPT(bool, DebugStrictDwarf) 96 CGOPT(unsigned, AlignLoops) 97 98 codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { 99 #define CGBINDOPT(NAME) \ 100 do { \ 101 NAME##View = std::addressof(NAME); \ 102 } while (0) 103 104 static cl::opt<std::string> MArch( 105 "march", cl::desc("Architecture to generate code for (see --version)")); 106 CGBINDOPT(MArch); 107 108 static cl::opt<std::string> MCPU( 109 "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"), 110 cl::value_desc("cpu-name"), cl::init("")); 111 CGBINDOPT(MCPU); 112 113 static cl::list<std::string> MAttrs( 114 "mattr", cl::CommaSeparated, 115 cl::desc("Target specific attributes (-mattr=help for details)"), 116 cl::value_desc("a1,+a2,-a3,...")); 117 CGBINDOPT(MAttrs); 118 119 static cl::opt<Reloc::Model> RelocModel( 120 "relocation-model", cl::desc("Choose relocation model"), 121 cl::values( 122 clEnumValN(Reloc::Static, "static", "Non-relocatable code"), 123 clEnumValN(Reloc::PIC_, "pic", 124 "Fully relocatable, position independent code"), 125 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 126 "Relocatable external references, non-relocatable code"), 127 clEnumValN( 128 Reloc::ROPI, "ropi", 129 "Code and read-only data relocatable, accessed PC-relative"), 130 clEnumValN( 131 Reloc::RWPI, "rwpi", 132 "Read-write data relocatable, accessed relative to static base"), 133 clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", 134 "Combination of ropi and rwpi"))); 135 CGBINDOPT(RelocModel); 136 137 static cl::opt<ThreadModel::Model> ThreadModel( 138 "thread-model", cl::desc("Choose threading model"), 139 cl::init(ThreadModel::POSIX), 140 cl::values( 141 clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"), 142 clEnumValN(ThreadModel::Single, "single", "Single thread model"))); 143 CGBINDOPT(ThreadModel); 144 145 static cl::opt<CodeModel::Model> CodeModel( 146 "code-model", cl::desc("Choose code model"), 147 cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"), 148 clEnumValN(CodeModel::Small, "small", "Small code model"), 149 clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"), 150 clEnumValN(CodeModel::Medium, "medium", "Medium code model"), 151 clEnumValN(CodeModel::Large, "large", "Large code model"))); 152 CGBINDOPT(CodeModel); 153 154 static cl::opt<ExceptionHandling> ExceptionModel( 155 "exception-model", cl::desc("exception model"), 156 cl::init(ExceptionHandling::None), 157 cl::values( 158 clEnumValN(ExceptionHandling::None, "default", 159 "default exception handling model"), 160 clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", 161 "DWARF-like CFI based exception handling"), 162 clEnumValN(ExceptionHandling::SjLj, "sjlj", 163 "SjLj exception handling"), 164 clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), 165 clEnumValN(ExceptionHandling::WinEH, "wineh", 166 "Windows exception model"), 167 clEnumValN(ExceptionHandling::Wasm, "wasm", 168 "WebAssembly exception handling"))); 169 CGBINDOPT(ExceptionModel); 170 171 static cl::opt<CodeGenFileType> FileType( 172 "filetype", cl::init(CGFT_AssemblyFile), 173 cl::desc( 174 "Choose a file type (not all types are supported by all targets):"), 175 cl::values( 176 clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"), 177 clEnumValN(CGFT_ObjectFile, "obj", 178 "Emit a native object ('.o') file"), 179 clEnumValN(CGFT_Null, "null", 180 "Emit nothing, for performance testing"))); 181 CGBINDOPT(FileType); 182 183 static cl::opt<FramePointerKind> FramePointerUsage( 184 "frame-pointer", 185 cl::desc("Specify frame pointer elimination optimization"), 186 cl::init(FramePointerKind::None), 187 cl::values( 188 clEnumValN(FramePointerKind::All, "all", 189 "Disable frame pointer elimination"), 190 clEnumValN(FramePointerKind::NonLeaf, "non-leaf", 191 "Disable frame pointer elimination for non-leaf frame"), 192 clEnumValN(FramePointerKind::None, "none", 193 "Enable frame pointer elimination"))); 194 CGBINDOPT(FramePointerUsage); 195 196 static cl::opt<bool> EnableUnsafeFPMath( 197 "enable-unsafe-fp-math", 198 cl::desc("Enable optimizations that may decrease FP precision"), 199 cl::init(false)); 200 CGBINDOPT(EnableUnsafeFPMath); 201 202 static cl::opt<bool> EnableNoInfsFPMath( 203 "enable-no-infs-fp-math", 204 cl::desc("Enable FP math optimizations that assume no +-Infs"), 205 cl::init(false)); 206 CGBINDOPT(EnableNoInfsFPMath); 207 208 static cl::opt<bool> EnableNoNaNsFPMath( 209 "enable-no-nans-fp-math", 210 cl::desc("Enable FP math optimizations that assume no NaNs"), 211 cl::init(false)); 212 CGBINDOPT(EnableNoNaNsFPMath); 213 214 static cl::opt<bool> EnableNoSignedZerosFPMath( 215 "enable-no-signed-zeros-fp-math", 216 cl::desc("Enable FP math optimizations that assume " 217 "the sign of 0 is insignificant"), 218 cl::init(false)); 219 CGBINDOPT(EnableNoSignedZerosFPMath); 220 221 static cl::opt<bool> EnableNoTrappingFPMath( 222 "enable-no-trapping-fp-math", 223 cl::desc("Enable setting the FP exceptions build " 224 "attribute not to use exceptions"), 225 cl::init(false)); 226 CGBINDOPT(EnableNoTrappingFPMath); 227 228 static const auto DenormFlagEnumOptions = 229 cl::values(clEnumValN(DenormalMode::IEEE, "ieee", 230 "IEEE 754 denormal numbers"), 231 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 232 "the sign of a flushed-to-zero number is preserved " 233 "in the sign of 0"), 234 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 235 "denormals are flushed to positive zero")); 236 237 // FIXME: Doesn't have way to specify separate input and output modes. 238 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 239 "denormal-fp-math", 240 cl::desc("Select which denormal numbers the code is permitted to require"), 241 cl::init(DenormalMode::IEEE), 242 DenormFlagEnumOptions); 243 CGBINDOPT(DenormalFPMath); 244 245 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 246 "denormal-fp-math-f32", 247 cl::desc("Select which denormal numbers the code is permitted to require for float"), 248 cl::init(DenormalMode::Invalid), 249 DenormFlagEnumOptions); 250 CGBINDOPT(DenormalFP32Math); 251 252 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 253 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 254 cl::desc("Force codegen to assume rounding mode can change dynamically"), 255 cl::init(false)); 256 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 257 258 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 259 "float-abi", cl::desc("Choose float ABI type"), 260 cl::init(FloatABI::Default), 261 cl::values(clEnumValN(FloatABI::Default, "default", 262 "Target default float ABI type"), 263 clEnumValN(FloatABI::Soft, "soft", 264 "Soft float ABI (implied by -soft-float)"), 265 clEnumValN(FloatABI::Hard, "hard", 266 "Hard float ABI (uses FP registers)"))); 267 CGBINDOPT(FloatABIForCalls); 268 269 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 270 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 271 cl::init(FPOpFusion::Standard), 272 cl::values( 273 clEnumValN(FPOpFusion::Fast, "fast", 274 "Fuse FP ops whenever profitable"), 275 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 276 clEnumValN(FPOpFusion::Strict, "off", 277 "Only fuse FP ops when the result won't be affected."))); 278 CGBINDOPT(FuseFPOps); 279 280 static cl::opt<SwiftAsyncFramePointerMode> SwiftAsyncFramePointer( 281 "swift-async-fp", 282 cl::desc("Determine when the Swift async frame pointer should be set"), 283 cl::init(SwiftAsyncFramePointerMode::Always), 284 cl::values(clEnumValN(SwiftAsyncFramePointerMode::DeploymentBased, "auto", 285 "Determine based on deployment target"), 286 clEnumValN(SwiftAsyncFramePointerMode::Always, "always", 287 "Always set the bit"), 288 clEnumValN(SwiftAsyncFramePointerMode::Never, "never", 289 "Never set the bit"))); 290 CGBINDOPT(SwiftAsyncFramePointer); 291 292 static cl::opt<bool> DontPlaceZerosInBSS( 293 "nozero-initialized-in-bss", 294 cl::desc("Don't place zero-initialized symbols into bss section"), 295 cl::init(false)); 296 CGBINDOPT(DontPlaceZerosInBSS); 297 298 static cl::opt<bool> EnableAIXExtendedAltivecABI( 299 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 300 cl::init(false)); 301 CGBINDOPT(EnableAIXExtendedAltivecABI); 302 303 static cl::opt<bool> EnableGuaranteedTailCallOpt( 304 "tailcallopt", 305 cl::desc( 306 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 307 cl::init(false)); 308 CGBINDOPT(EnableGuaranteedTailCallOpt); 309 310 static cl::opt<bool> DisableTailCalls( 311 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 312 CGBINDOPT(DisableTailCalls); 313 314 static cl::opt<bool> StackSymbolOrdering( 315 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 316 cl::init(true)); 317 CGBINDOPT(StackSymbolOrdering); 318 319 static cl::opt<bool> StackRealign( 320 "stackrealign", 321 cl::desc("Force align the stack to the minimum alignment"), 322 cl::init(false)); 323 CGBINDOPT(StackRealign); 324 325 static cl::opt<std::string> TrapFuncName( 326 "trap-func", cl::Hidden, 327 cl::desc("Emit a call to trap function rather than a trap instruction"), 328 cl::init("")); 329 CGBINDOPT(TrapFuncName); 330 331 static cl::opt<bool> UseCtors("use-ctors", 332 cl::desc("Use .ctors instead of .init_array."), 333 cl::init(false)); 334 CGBINDOPT(UseCtors); 335 336 static cl::opt<bool> RelaxELFRelocations( 337 "relax-elf-relocations", 338 cl::desc( 339 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 340 cl::init(false)); 341 CGBINDOPT(RelaxELFRelocations); 342 343 static cl::opt<bool> DataSections( 344 "data-sections", cl::desc("Emit data into separate sections"), 345 cl::init(false)); 346 CGBINDOPT(DataSections); 347 348 static cl::opt<bool> FunctionSections( 349 "function-sections", cl::desc("Emit functions into separate sections"), 350 cl::init(false)); 351 CGBINDOPT(FunctionSections); 352 353 static cl::opt<bool> IgnoreXCOFFVisibility( 354 "ignore-xcoff-visibility", 355 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 356 "all symbols 'unspecified' visibility in XCOFF object file"), 357 cl::init(false)); 358 CGBINDOPT(IgnoreXCOFFVisibility); 359 360 static cl::opt<bool> XCOFFTracebackTable( 361 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 362 cl::init(true)); 363 CGBINDOPT(XCOFFTracebackTable); 364 365 static cl::opt<std::string> BBSections( 366 "basic-block-sections", 367 cl::desc("Emit basic blocks into separate sections"), 368 cl::value_desc("all | <function list (file)> | labels | none"), 369 cl::init("none")); 370 CGBINDOPT(BBSections); 371 372 static cl::opt<unsigned> TLSSize( 373 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 374 CGBINDOPT(TLSSize); 375 376 static cl::opt<bool> EmulatedTLS( 377 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 378 CGBINDOPT(EmulatedTLS); 379 380 static cl::opt<bool> UniqueSectionNames( 381 "unique-section-names", cl::desc("Give unique names to every section"), 382 cl::init(true)); 383 CGBINDOPT(UniqueSectionNames); 384 385 static cl::opt<bool> UniqueBasicBlockSectionNames( 386 "unique-basic-block-section-names", 387 cl::desc("Give unique names to every basic block section"), 388 cl::init(false)); 389 CGBINDOPT(UniqueBasicBlockSectionNames); 390 391 static cl::opt<EABI> EABIVersion( 392 "meabi", cl::desc("Set EABI type (default depends on triple):"), 393 cl::init(EABI::Default), 394 cl::values( 395 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 396 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 397 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 398 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 399 CGBINDOPT(EABIVersion); 400 401 static cl::opt<DebuggerKind> DebuggerTuningOpt( 402 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 403 cl::init(DebuggerKind::Default), 404 cl::values( 405 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 406 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 407 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 408 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 409 CGBINDOPT(DebuggerTuningOpt); 410 411 static cl::opt<bool> EnableStackSizeSection( 412 "stack-size-section", 413 cl::desc("Emit a section containing stack size metadata"), 414 cl::init(false)); 415 CGBINDOPT(EnableStackSizeSection); 416 417 static cl::opt<bool> EnableAddrsig( 418 "addrsig", cl::desc("Emit an address-significance table"), 419 cl::init(false)); 420 CGBINDOPT(EnableAddrsig); 421 422 static cl::opt<bool> EmitCallSiteInfo( 423 "emit-call-site-info", 424 cl::desc( 425 "Emit call site debug information, if debug information is enabled."), 426 cl::init(false)); 427 CGBINDOPT(EmitCallSiteInfo); 428 429 static cl::opt<bool> EnableDebugEntryValues( 430 "debug-entry-values", 431 cl::desc("Enable debug info for the debug entry values."), 432 cl::init(false)); 433 CGBINDOPT(EnableDebugEntryValues); 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.ForceDwarfFrameSection = getForceDwarfFrameSection(); 531 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 532 Options.DebugStrictDwarf = getDebugStrictDwarf(); 533 Options.LoopAlignment = getAlignLoops(); 534 535 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 536 537 Options.ThreadModel = getThreadModel(); 538 Options.EABIVersion = getEABIVersion(); 539 Options.DebuggerTuning = getDebuggerTuningOpt(); 540 Options.SwiftAsyncFramePointer = getSwiftAsyncFramePointer(); 541 return Options; 542 } 543 544 std::string codegen::getCPUStr() { 545 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 546 // this will set the CPU to an empty string which tells the target to 547 // pick a basic default. 548 if (getMCPU() == "native") 549 return std::string(sys::getHostCPUName()); 550 551 return getMCPU(); 552 } 553 554 std::string codegen::getFeaturesStr() { 555 SubtargetFeatures Features; 556 557 // If user asked for the 'native' CPU, we need to autodetect features. 558 // This is necessary for x86 where the CPU might not support all the 559 // features the autodetected CPU name lists in the target. For example, 560 // not all Sandybridge processors support AVX. 561 if (getMCPU() == "native") { 562 StringMap<bool> HostFeatures; 563 if (sys::getHostCPUFeatures(HostFeatures)) 564 for (auto &F : HostFeatures) 565 Features.AddFeature(F.first(), F.second); 566 } 567 568 for (auto const &MAttr : getMAttrs()) 569 Features.AddFeature(MAttr); 570 571 return Features.getString(); 572 } 573 574 std::vector<std::string> codegen::getFeatureList() { 575 SubtargetFeatures Features; 576 577 // If user asked for the 'native' CPU, we need to autodetect features. 578 // This is necessary for x86 where the CPU might not support all the 579 // features the autodetected CPU name lists in the target. For example, 580 // not all Sandybridge processors support AVX. 581 if (getMCPU() == "native") { 582 StringMap<bool> HostFeatures; 583 if (sys::getHostCPUFeatures(HostFeatures)) 584 for (auto &F : HostFeatures) 585 Features.AddFeature(F.first(), F.second); 586 } 587 588 for (auto const &MAttr : getMAttrs()) 589 Features.AddFeature(MAttr); 590 591 return Features.getFeatures(); 592 } 593 594 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 595 B.addAttribute(Name, Val ? "true" : "false"); 596 } 597 598 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 599 do { \ 600 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 601 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 602 } while (0) 603 604 /// Set function attributes of function \p F based on CPU, Features, and command 605 /// line flags. 606 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 607 Function &F) { 608 auto &Ctx = F.getContext(); 609 AttributeList Attrs = F.getAttributes(); 610 AttrBuilder NewAttrs(Ctx); 611 612 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 613 NewAttrs.addAttribute("target-cpu", CPU); 614 if (!Features.empty()) { 615 // Append the command line features to any that are already on the function. 616 StringRef OldFeatures = 617 F.getFnAttribute("target-features").getValueAsString(); 618 if (OldFeatures.empty()) 619 NewAttrs.addAttribute("target-features", Features); 620 else { 621 SmallString<256> Appended(OldFeatures); 622 Appended.push_back(','); 623 Appended.append(Features); 624 NewAttrs.addAttribute("target-features", Appended); 625 } 626 } 627 if (FramePointerUsageView->getNumOccurrences() > 0 && 628 !F.hasFnAttribute("frame-pointer")) { 629 if (getFramePointerUsage() == FramePointerKind::All) 630 NewAttrs.addAttribute("frame-pointer", "all"); 631 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 632 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 633 else if (getFramePointerUsage() == FramePointerKind::None) 634 NewAttrs.addAttribute("frame-pointer", "none"); 635 } 636 if (DisableTailCallsView->getNumOccurrences() > 0) 637 NewAttrs.addAttribute("disable-tail-calls", 638 toStringRef(getDisableTailCalls())); 639 if (getStackRealign()) 640 NewAttrs.addAttribute("stackrealign"); 641 642 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 643 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 644 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 645 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 646 647 if (DenormalFPMathView->getNumOccurrences() > 0 && 648 !F.hasFnAttribute("denormal-fp-math")) { 649 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 650 651 // FIXME: Command line flag should expose separate input/output modes. 652 NewAttrs.addAttribute("denormal-fp-math", 653 DenormalMode(DenormKind, DenormKind).str()); 654 } 655 656 if (DenormalFP32MathView->getNumOccurrences() > 0 && 657 !F.hasFnAttribute("denormal-fp-math-f32")) { 658 // FIXME: Command line flag should expose separate input/output modes. 659 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 660 661 NewAttrs.addAttribute( 662 "denormal-fp-math-f32", 663 DenormalMode(DenormKind, DenormKind).str()); 664 } 665 666 if (TrapFuncNameView->getNumOccurrences() > 0) 667 for (auto &B : F) 668 for (auto &I : B) 669 if (auto *Call = dyn_cast<CallInst>(&I)) 670 if (const auto *F = Call->getCalledFunction()) 671 if (F->getIntrinsicID() == Intrinsic::debugtrap || 672 F->getIntrinsicID() == Intrinsic::trap) 673 Call->addFnAttr( 674 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 675 676 // Let NewAttrs override Attrs. 677 F.setAttributes(Attrs.addFnAttributes(Ctx, NewAttrs)); 678 } 679 680 /// Set function attributes of functions in Module M based on CPU, 681 /// Features, and command line flags. 682 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 683 Module &M) { 684 for (Function &F : M) 685 setFunctionAttributes(CPU, Features, F); 686 } 687 688