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, EnableApproxFuncFPMath) 62 CGOPT(bool, EnableNoTrappingFPMath) 63 CGOPT(bool, EnableAIXExtendedAltivecABI) 64 CGOPT(DenormalMode::DenormalModeKind, DenormalFPMath) 65 CGOPT(DenormalMode::DenormalModeKind, DenormalFP32Math) 66 CGOPT(bool, EnableHonorSignDependentRoundingFPMath) 67 CGOPT(FloatABI::ABIType, FloatABIForCalls) 68 CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) 69 CGOPT(SwiftAsyncFramePointerMode, SwiftAsyncFramePointer) 70 CGOPT(bool, DontPlaceZerosInBSS) 71 CGOPT(bool, EnableGuaranteedTailCallOpt) 72 CGOPT(bool, DisableTailCalls) 73 CGOPT(bool, StackSymbolOrdering) 74 CGOPT(bool, StackRealign) 75 CGOPT(std::string, TrapFuncName) 76 CGOPT(bool, UseCtors) 77 CGOPT(bool, RelaxELFRelocations) 78 CGOPT_EXP(bool, DataSections) 79 CGOPT_EXP(bool, FunctionSections) 80 CGOPT(bool, IgnoreXCOFFVisibility) 81 CGOPT(bool, XCOFFTracebackTable) 82 CGOPT(std::string, BBSections) 83 CGOPT(unsigned, TLSSize) 84 CGOPT(bool, EmulatedTLS) 85 CGOPT(bool, UniqueSectionNames) 86 CGOPT(bool, UniqueBasicBlockSectionNames) 87 CGOPT(EABI, EABIVersion) 88 CGOPT(DebuggerKind, DebuggerTuningOpt) 89 CGOPT(bool, EnableStackSizeSection) 90 CGOPT(bool, EnableAddrsig) 91 CGOPT(bool, EmitCallSiteInfo) 92 CGOPT(bool, EnableMachineFunctionSplitter) 93 CGOPT(bool, EnableDebugEntryValues) 94 CGOPT(bool, ForceDwarfFrameSection) 95 CGOPT(bool, XRayOmitFunctionIndex) 96 CGOPT(bool, DebugStrictDwarf) 97 CGOPT(unsigned, AlignLoops) 98 CGOPT(bool, JMCInstrument) 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<FramePointerKind> FramePointerUsage( 186 "frame-pointer", 187 cl::desc("Specify frame pointer elimination optimization"), 188 cl::init(FramePointerKind::None), 189 cl::values( 190 clEnumValN(FramePointerKind::All, "all", 191 "Disable frame pointer elimination"), 192 clEnumValN(FramePointerKind::NonLeaf, "non-leaf", 193 "Disable frame pointer elimination for non-leaf frame"), 194 clEnumValN(FramePointerKind::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> EnableApproxFuncFPMath( 224 "enable-approx-func-fp-math", 225 cl::desc("Enable FP math optimizations that assume approx func"), 226 cl::init(false)); 227 CGBINDOPT(EnableApproxFuncFPMath); 228 229 static cl::opt<bool> EnableNoTrappingFPMath( 230 "enable-no-trapping-fp-math", 231 cl::desc("Enable setting the FP exceptions build " 232 "attribute not to use exceptions"), 233 cl::init(false)); 234 CGBINDOPT(EnableNoTrappingFPMath); 235 236 static const auto DenormFlagEnumOptions = 237 cl::values(clEnumValN(DenormalMode::IEEE, "ieee", 238 "IEEE 754 denormal numbers"), 239 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 240 "the sign of a flushed-to-zero number is preserved " 241 "in the sign of 0"), 242 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 243 "denormals are flushed to positive zero")); 244 245 // FIXME: Doesn't have way to specify separate input and output modes. 246 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 247 "denormal-fp-math", 248 cl::desc("Select which denormal numbers the code is permitted to require"), 249 cl::init(DenormalMode::IEEE), 250 DenormFlagEnumOptions); 251 CGBINDOPT(DenormalFPMath); 252 253 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 254 "denormal-fp-math-f32", 255 cl::desc("Select which denormal numbers the code is permitted to require for float"), 256 cl::init(DenormalMode::Invalid), 257 DenormFlagEnumOptions); 258 CGBINDOPT(DenormalFP32Math); 259 260 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 261 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 262 cl::desc("Force codegen to assume rounding mode can change dynamically"), 263 cl::init(false)); 264 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 265 266 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 267 "float-abi", cl::desc("Choose float ABI type"), 268 cl::init(FloatABI::Default), 269 cl::values(clEnumValN(FloatABI::Default, "default", 270 "Target default float ABI type"), 271 clEnumValN(FloatABI::Soft, "soft", 272 "Soft float ABI (implied by -soft-float)"), 273 clEnumValN(FloatABI::Hard, "hard", 274 "Hard float ABI (uses FP registers)"))); 275 CGBINDOPT(FloatABIForCalls); 276 277 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 278 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 279 cl::init(FPOpFusion::Standard), 280 cl::values( 281 clEnumValN(FPOpFusion::Fast, "fast", 282 "Fuse FP ops whenever profitable"), 283 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 284 clEnumValN(FPOpFusion::Strict, "off", 285 "Only fuse FP ops when the result won't be affected."))); 286 CGBINDOPT(FuseFPOps); 287 288 static cl::opt<SwiftAsyncFramePointerMode> SwiftAsyncFramePointer( 289 "swift-async-fp", 290 cl::desc("Determine when the Swift async frame pointer should be set"), 291 cl::init(SwiftAsyncFramePointerMode::Always), 292 cl::values(clEnumValN(SwiftAsyncFramePointerMode::DeploymentBased, "auto", 293 "Determine based on deployment target"), 294 clEnumValN(SwiftAsyncFramePointerMode::Always, "always", 295 "Always set the bit"), 296 clEnumValN(SwiftAsyncFramePointerMode::Never, "never", 297 "Never set the bit"))); 298 CGBINDOPT(SwiftAsyncFramePointer); 299 300 static cl::opt<bool> DontPlaceZerosInBSS( 301 "nozero-initialized-in-bss", 302 cl::desc("Don't place zero-initialized symbols into bss section"), 303 cl::init(false)); 304 CGBINDOPT(DontPlaceZerosInBSS); 305 306 static cl::opt<bool> EnableAIXExtendedAltivecABI( 307 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 308 cl::init(false)); 309 CGBINDOPT(EnableAIXExtendedAltivecABI); 310 311 static cl::opt<bool> EnableGuaranteedTailCallOpt( 312 "tailcallopt", 313 cl::desc( 314 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 315 cl::init(false)); 316 CGBINDOPT(EnableGuaranteedTailCallOpt); 317 318 static cl::opt<bool> DisableTailCalls( 319 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 320 CGBINDOPT(DisableTailCalls); 321 322 static cl::opt<bool> StackSymbolOrdering( 323 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 324 cl::init(true)); 325 CGBINDOPT(StackSymbolOrdering); 326 327 static cl::opt<bool> StackRealign( 328 "stackrealign", 329 cl::desc("Force align the stack to the minimum alignment"), 330 cl::init(false)); 331 CGBINDOPT(StackRealign); 332 333 static cl::opt<std::string> TrapFuncName( 334 "trap-func", cl::Hidden, 335 cl::desc("Emit a call to trap function rather than a trap instruction"), 336 cl::init("")); 337 CGBINDOPT(TrapFuncName); 338 339 static cl::opt<bool> UseCtors("use-ctors", 340 cl::desc("Use .ctors instead of .init_array."), 341 cl::init(false)); 342 CGBINDOPT(UseCtors); 343 344 static cl::opt<bool> RelaxELFRelocations( 345 "relax-elf-relocations", 346 cl::desc( 347 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 348 cl::init(false)); 349 CGBINDOPT(RelaxELFRelocations); 350 351 static cl::opt<bool> DataSections( 352 "data-sections", cl::desc("Emit data into separate sections"), 353 cl::init(false)); 354 CGBINDOPT(DataSections); 355 356 static cl::opt<bool> FunctionSections( 357 "function-sections", cl::desc("Emit functions into separate sections"), 358 cl::init(false)); 359 CGBINDOPT(FunctionSections); 360 361 static cl::opt<bool> IgnoreXCOFFVisibility( 362 "ignore-xcoff-visibility", 363 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 364 "all symbols 'unspecified' visibility in XCOFF object file"), 365 cl::init(false)); 366 CGBINDOPT(IgnoreXCOFFVisibility); 367 368 static cl::opt<bool> XCOFFTracebackTable( 369 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 370 cl::init(true)); 371 CGBINDOPT(XCOFFTracebackTable); 372 373 static cl::opt<std::string> BBSections( 374 "basic-block-sections", 375 cl::desc("Emit basic blocks into separate sections"), 376 cl::value_desc("all | <function list (file)> | labels | none"), 377 cl::init("none")); 378 CGBINDOPT(BBSections); 379 380 static cl::opt<unsigned> TLSSize( 381 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 382 CGBINDOPT(TLSSize); 383 384 static cl::opt<bool> EmulatedTLS( 385 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 386 CGBINDOPT(EmulatedTLS); 387 388 static cl::opt<bool> UniqueSectionNames( 389 "unique-section-names", cl::desc("Give unique names to every section"), 390 cl::init(true)); 391 CGBINDOPT(UniqueSectionNames); 392 393 static cl::opt<bool> UniqueBasicBlockSectionNames( 394 "unique-basic-block-section-names", 395 cl::desc("Give unique names to every basic block section"), 396 cl::init(false)); 397 CGBINDOPT(UniqueBasicBlockSectionNames); 398 399 static cl::opt<EABI> EABIVersion( 400 "meabi", cl::desc("Set EABI type (default depends on triple):"), 401 cl::init(EABI::Default), 402 cl::values( 403 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 404 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 405 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 406 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 407 CGBINDOPT(EABIVersion); 408 409 static cl::opt<DebuggerKind> DebuggerTuningOpt( 410 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 411 cl::init(DebuggerKind::Default), 412 cl::values( 413 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 414 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 415 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 416 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 417 CGBINDOPT(DebuggerTuningOpt); 418 419 static cl::opt<bool> EnableStackSizeSection( 420 "stack-size-section", 421 cl::desc("Emit a section containing stack size metadata"), 422 cl::init(false)); 423 CGBINDOPT(EnableStackSizeSection); 424 425 static cl::opt<bool> EnableAddrsig( 426 "addrsig", cl::desc("Emit an address-significance table"), 427 cl::init(false)); 428 CGBINDOPT(EnableAddrsig); 429 430 static cl::opt<bool> EmitCallSiteInfo( 431 "emit-call-site-info", 432 cl::desc( 433 "Emit call site debug information, if debug information is enabled."), 434 cl::init(false)); 435 CGBINDOPT(EmitCallSiteInfo); 436 437 static cl::opt<bool> EnableDebugEntryValues( 438 "debug-entry-values", 439 cl::desc("Enable debug info for the debug entry values."), 440 cl::init(false)); 441 CGBINDOPT(EnableDebugEntryValues); 442 443 static cl::opt<bool> EnableMachineFunctionSplitter( 444 "split-machine-functions", 445 cl::desc("Split out cold basic blocks from machine functions based on " 446 "profile information"), 447 cl::init(false)); 448 CGBINDOPT(EnableMachineFunctionSplitter); 449 450 static cl::opt<bool> ForceDwarfFrameSection( 451 "force-dwarf-frame-section", 452 cl::desc("Always emit a debug frame section."), cl::init(false)); 453 CGBINDOPT(ForceDwarfFrameSection); 454 455 static cl::opt<bool> XRayOmitFunctionIndex( 456 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 457 cl::init(false)); 458 CGBINDOPT(XRayOmitFunctionIndex); 459 460 static cl::opt<bool> DebugStrictDwarf( 461 "strict-dwarf", cl::desc("use strict dwarf"), cl::init(false)); 462 CGBINDOPT(DebugStrictDwarf); 463 464 static cl::opt<unsigned> AlignLoops("align-loops", 465 cl::desc("Default alignment for loops")); 466 CGBINDOPT(AlignLoops); 467 468 static cl::opt<bool> JMCInstrument( 469 "enable-jmc-instrument", 470 cl::desc("Instrument functions with a call to __CheckForDebuggerJustMyCode"), 471 cl::init(false)); 472 CGBINDOPT(JMCInstrument); 473 474 #undef CGBINDOPT 475 476 mc::RegisterMCTargetOptionsFlags(); 477 } 478 479 llvm::BasicBlockSection 480 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 481 if (getBBSections() == "all") 482 return BasicBlockSection::All; 483 else if (getBBSections() == "labels") 484 return BasicBlockSection::Labels; 485 else if (getBBSections() == "none") 486 return BasicBlockSection::None; 487 else { 488 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 489 MemoryBuffer::getFile(getBBSections()); 490 if (!MBOrErr) { 491 errs() << "Error loading basic block sections function list file: " 492 << MBOrErr.getError().message() << "\n"; 493 } else { 494 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 495 } 496 return BasicBlockSection::List; 497 } 498 } 499 500 // Common utility function tightly tied to the options listed here. Initializes 501 // a TargetOptions object with CodeGen flags and returns it. 502 TargetOptions 503 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 504 TargetOptions Options; 505 Options.AllowFPOpFusion = getFuseFPOps(); 506 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 507 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 508 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 509 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 510 Options.ApproxFuncFPMath = getEnableApproxFuncFPMath(); 511 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 512 513 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 514 515 // FIXME: Should have separate input and output flags 516 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 517 518 Options.HonorSignDependentRoundingFPMathOption = 519 getEnableHonorSignDependentRoundingFPMath(); 520 if (getFloatABIForCalls() != FloatABI::Default) 521 Options.FloatABIType = getFloatABIForCalls(); 522 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 523 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 524 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 525 Options.StackSymbolOrdering = getStackSymbolOrdering(); 526 Options.UseInitArray = !getUseCtors(); 527 Options.RelaxELFRelocations = getRelaxELFRelocations(); 528 Options.DataSections = 529 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 530 Options.FunctionSections = getFunctionSections(); 531 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 532 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 533 Options.BBSections = getBBSectionsMode(Options); 534 Options.UniqueSectionNames = getUniqueSectionNames(); 535 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 536 Options.TLSSize = getTLSSize(); 537 Options.EmulatedTLS = getEmulatedTLS(); 538 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 539 Options.ExceptionModel = getExceptionModel(); 540 Options.EmitStackSizeSection = getEnableStackSizeSection(); 541 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 542 Options.EmitAddrsig = getEnableAddrsig(); 543 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 544 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 545 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 546 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 547 Options.DebugStrictDwarf = getDebugStrictDwarf(); 548 Options.LoopAlignment = getAlignLoops(); 549 Options.JMCInstrument = getJMCInstrument(); 550 551 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 552 553 Options.ThreadModel = getThreadModel(); 554 Options.EABIVersion = getEABIVersion(); 555 Options.DebuggerTuning = getDebuggerTuningOpt(); 556 Options.SwiftAsyncFramePointer = getSwiftAsyncFramePointer(); 557 return Options; 558 } 559 560 std::string codegen::getCPUStr() { 561 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 562 // this will set the CPU to an empty string which tells the target to 563 // pick a basic default. 564 if (getMCPU() == "native") 565 return std::string(sys::getHostCPUName()); 566 567 return getMCPU(); 568 } 569 570 std::string codegen::getFeaturesStr() { 571 SubtargetFeatures Features; 572 573 // If user asked for the 'native' CPU, we need to autodetect features. 574 // This is necessary for x86 where the CPU might not support all the 575 // features the autodetected CPU name lists in the target. For example, 576 // not all Sandybridge processors support AVX. 577 if (getMCPU() == "native") { 578 StringMap<bool> HostFeatures; 579 if (sys::getHostCPUFeatures(HostFeatures)) 580 for (auto &F : HostFeatures) 581 Features.AddFeature(F.first(), F.second); 582 } 583 584 for (auto const &MAttr : getMAttrs()) 585 Features.AddFeature(MAttr); 586 587 return Features.getString(); 588 } 589 590 std::vector<std::string> codegen::getFeatureList() { 591 SubtargetFeatures Features; 592 593 // If user asked for the 'native' CPU, we need to autodetect features. 594 // This is necessary for x86 where the CPU might not support all the 595 // features the autodetected CPU name lists in the target. For example, 596 // not all Sandybridge processors support AVX. 597 if (getMCPU() == "native") { 598 StringMap<bool> HostFeatures; 599 if (sys::getHostCPUFeatures(HostFeatures)) 600 for (auto &F : HostFeatures) 601 Features.AddFeature(F.first(), F.second); 602 } 603 604 for (auto const &MAttr : getMAttrs()) 605 Features.AddFeature(MAttr); 606 607 return Features.getFeatures(); 608 } 609 610 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 611 B.addAttribute(Name, Val ? "true" : "false"); 612 } 613 614 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 615 do { \ 616 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 617 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 618 } while (0) 619 620 /// Set function attributes of function \p F based on CPU, Features, and command 621 /// line flags. 622 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 623 Function &F) { 624 auto &Ctx = F.getContext(); 625 AttributeList Attrs = F.getAttributes(); 626 AttrBuilder NewAttrs(Ctx); 627 628 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 629 NewAttrs.addAttribute("target-cpu", CPU); 630 if (!Features.empty()) { 631 // Append the command line features to any that are already on the function. 632 StringRef OldFeatures = 633 F.getFnAttribute("target-features").getValueAsString(); 634 if (OldFeatures.empty()) 635 NewAttrs.addAttribute("target-features", Features); 636 else { 637 SmallString<256> Appended(OldFeatures); 638 Appended.push_back(','); 639 Appended.append(Features); 640 NewAttrs.addAttribute("target-features", Appended); 641 } 642 } 643 if (FramePointerUsageView->getNumOccurrences() > 0 && 644 !F.hasFnAttribute("frame-pointer")) { 645 if (getFramePointerUsage() == FramePointerKind::All) 646 NewAttrs.addAttribute("frame-pointer", "all"); 647 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 648 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 649 else if (getFramePointerUsage() == FramePointerKind::None) 650 NewAttrs.addAttribute("frame-pointer", "none"); 651 } 652 if (DisableTailCallsView->getNumOccurrences() > 0) 653 NewAttrs.addAttribute("disable-tail-calls", 654 toStringRef(getDisableTailCalls())); 655 if (getStackRealign()) 656 NewAttrs.addAttribute("stackrealign"); 657 658 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 659 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 660 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 661 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 662 HANDLE_BOOL_ATTR(EnableApproxFuncFPMathView, "approx-func-fp-math"); 663 664 if (DenormalFPMathView->getNumOccurrences() > 0 && 665 !F.hasFnAttribute("denormal-fp-math")) { 666 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 667 668 // FIXME: Command line flag should expose separate input/output modes. 669 NewAttrs.addAttribute("denormal-fp-math", 670 DenormalMode(DenormKind, DenormKind).str()); 671 } 672 673 if (DenormalFP32MathView->getNumOccurrences() > 0 && 674 !F.hasFnAttribute("denormal-fp-math-f32")) { 675 // FIXME: Command line flag should expose separate input/output modes. 676 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 677 678 NewAttrs.addAttribute( 679 "denormal-fp-math-f32", 680 DenormalMode(DenormKind, DenormKind).str()); 681 } 682 683 if (TrapFuncNameView->getNumOccurrences() > 0) 684 for (auto &B : F) 685 for (auto &I : B) 686 if (auto *Call = dyn_cast<CallInst>(&I)) 687 if (const auto *F = Call->getCalledFunction()) 688 if (F->getIntrinsicID() == Intrinsic::debugtrap || 689 F->getIntrinsicID() == Intrinsic::trap) 690 Call->addFnAttr( 691 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 692 693 // Let NewAttrs override Attrs. 694 F.setAttributes(Attrs.addFnAttributes(Ctx, NewAttrs)); 695 } 696 697 /// Set function attributes of functions in Module M based on CPU, 698 /// Features, and command line flags. 699 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 700 Module &M) { 701 for (Function &F : M) 702 setFunctionAttributes(CPU, Features, F); 703 } 704 705