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