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 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> EnableApproxFuncFPMath( 223 "enable-approx-func-fp-math", 224 cl::desc("Enable FP math optimizations that assume approx func"), 225 cl::init(false)); 226 CGBINDOPT(EnableApproxFuncFPMath); 227 228 static cl::opt<bool> EnableNoTrappingFPMath( 229 "enable-no-trapping-fp-math", 230 cl::desc("Enable setting the FP exceptions build " 231 "attribute not to use exceptions"), 232 cl::init(false)); 233 CGBINDOPT(EnableNoTrappingFPMath); 234 235 static const auto DenormFlagEnumOptions = 236 cl::values(clEnumValN(DenormalMode::IEEE, "ieee", 237 "IEEE 754 denormal numbers"), 238 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 239 "the sign of a flushed-to-zero number is preserved " 240 "in the sign of 0"), 241 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 242 "denormals are flushed to positive zero")); 243 244 // FIXME: Doesn't have way to specify separate input and output modes. 245 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 246 "denormal-fp-math", 247 cl::desc("Select which denormal numbers the code is permitted to require"), 248 cl::init(DenormalMode::IEEE), 249 DenormFlagEnumOptions); 250 CGBINDOPT(DenormalFPMath); 251 252 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 253 "denormal-fp-math-f32", 254 cl::desc("Select which denormal numbers the code is permitted to require for float"), 255 cl::init(DenormalMode::Invalid), 256 DenormFlagEnumOptions); 257 CGBINDOPT(DenormalFP32Math); 258 259 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 260 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 261 cl::desc("Force codegen to assume rounding mode can change dynamically"), 262 cl::init(false)); 263 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 264 265 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 266 "float-abi", cl::desc("Choose float ABI type"), 267 cl::init(FloatABI::Default), 268 cl::values(clEnumValN(FloatABI::Default, "default", 269 "Target default float ABI type"), 270 clEnumValN(FloatABI::Soft, "soft", 271 "Soft float ABI (implied by -soft-float)"), 272 clEnumValN(FloatABI::Hard, "hard", 273 "Hard float ABI (uses FP registers)"))); 274 CGBINDOPT(FloatABIForCalls); 275 276 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 277 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 278 cl::init(FPOpFusion::Standard), 279 cl::values( 280 clEnumValN(FPOpFusion::Fast, "fast", 281 "Fuse FP ops whenever profitable"), 282 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 283 clEnumValN(FPOpFusion::Strict, "off", 284 "Only fuse FP ops when the result won't be affected."))); 285 CGBINDOPT(FuseFPOps); 286 287 static cl::opt<SwiftAsyncFramePointerMode> SwiftAsyncFramePointer( 288 "swift-async-fp", 289 cl::desc("Determine when the Swift async frame pointer should be set"), 290 cl::init(SwiftAsyncFramePointerMode::Always), 291 cl::values(clEnumValN(SwiftAsyncFramePointerMode::DeploymentBased, "auto", 292 "Determine based on deployment target"), 293 clEnumValN(SwiftAsyncFramePointerMode::Always, "always", 294 "Always set the bit"), 295 clEnumValN(SwiftAsyncFramePointerMode::Never, "never", 296 "Never set the bit"))); 297 CGBINDOPT(SwiftAsyncFramePointer); 298 299 static cl::opt<bool> DontPlaceZerosInBSS( 300 "nozero-initialized-in-bss", 301 cl::desc("Don't place zero-initialized symbols into bss section"), 302 cl::init(false)); 303 CGBINDOPT(DontPlaceZerosInBSS); 304 305 static cl::opt<bool> EnableAIXExtendedAltivecABI( 306 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 307 cl::init(false)); 308 CGBINDOPT(EnableAIXExtendedAltivecABI); 309 310 static cl::opt<bool> EnableGuaranteedTailCallOpt( 311 "tailcallopt", 312 cl::desc( 313 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 314 cl::init(false)); 315 CGBINDOPT(EnableGuaranteedTailCallOpt); 316 317 static cl::opt<bool> DisableTailCalls( 318 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 319 CGBINDOPT(DisableTailCalls); 320 321 static cl::opt<bool> StackSymbolOrdering( 322 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 323 cl::init(true)); 324 CGBINDOPT(StackSymbolOrdering); 325 326 static cl::opt<bool> StackRealign( 327 "stackrealign", 328 cl::desc("Force align the stack to the minimum alignment"), 329 cl::init(false)); 330 CGBINDOPT(StackRealign); 331 332 static cl::opt<std::string> TrapFuncName( 333 "trap-func", cl::Hidden, 334 cl::desc("Emit a call to trap function rather than a trap instruction"), 335 cl::init("")); 336 CGBINDOPT(TrapFuncName); 337 338 static cl::opt<bool> UseCtors("use-ctors", 339 cl::desc("Use .ctors instead of .init_array."), 340 cl::init(false)); 341 CGBINDOPT(UseCtors); 342 343 static cl::opt<bool> RelaxELFRelocations( 344 "relax-elf-relocations", 345 cl::desc( 346 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 347 cl::init(false)); 348 CGBINDOPT(RelaxELFRelocations); 349 350 static cl::opt<bool> DataSections( 351 "data-sections", cl::desc("Emit data into separate sections"), 352 cl::init(false)); 353 CGBINDOPT(DataSections); 354 355 static cl::opt<bool> FunctionSections( 356 "function-sections", cl::desc("Emit functions into separate sections"), 357 cl::init(false)); 358 CGBINDOPT(FunctionSections); 359 360 static cl::opt<bool> IgnoreXCOFFVisibility( 361 "ignore-xcoff-visibility", 362 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 363 "all symbols 'unspecified' visibility in XCOFF object file"), 364 cl::init(false)); 365 CGBINDOPT(IgnoreXCOFFVisibility); 366 367 static cl::opt<bool> XCOFFTracebackTable( 368 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 369 cl::init(true)); 370 CGBINDOPT(XCOFFTracebackTable); 371 372 static cl::opt<std::string> BBSections( 373 "basic-block-sections", 374 cl::desc("Emit basic blocks into separate sections"), 375 cl::value_desc("all | <function list (file)> | labels | none"), 376 cl::init("none")); 377 CGBINDOPT(BBSections); 378 379 static cl::opt<unsigned> TLSSize( 380 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 381 CGBINDOPT(TLSSize); 382 383 static cl::opt<bool> EmulatedTLS( 384 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 385 CGBINDOPT(EmulatedTLS); 386 387 static cl::opt<bool> UniqueSectionNames( 388 "unique-section-names", cl::desc("Give unique names to every section"), 389 cl::init(true)); 390 CGBINDOPT(UniqueSectionNames); 391 392 static cl::opt<bool> UniqueBasicBlockSectionNames( 393 "unique-basic-block-section-names", 394 cl::desc("Give unique names to every basic block section"), 395 cl::init(false)); 396 CGBINDOPT(UniqueBasicBlockSectionNames); 397 398 static cl::opt<EABI> EABIVersion( 399 "meabi", cl::desc("Set EABI type (default depends on triple):"), 400 cl::init(EABI::Default), 401 cl::values( 402 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 403 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 404 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 405 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 406 CGBINDOPT(EABIVersion); 407 408 static cl::opt<DebuggerKind> DebuggerTuningOpt( 409 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 410 cl::init(DebuggerKind::Default), 411 cl::values( 412 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 413 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 414 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 415 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 416 CGBINDOPT(DebuggerTuningOpt); 417 418 static cl::opt<bool> EnableStackSizeSection( 419 "stack-size-section", 420 cl::desc("Emit a section containing stack size metadata"), 421 cl::init(false)); 422 CGBINDOPT(EnableStackSizeSection); 423 424 static cl::opt<bool> EnableAddrsig( 425 "addrsig", cl::desc("Emit an address-significance table"), 426 cl::init(false)); 427 CGBINDOPT(EnableAddrsig); 428 429 static cl::opt<bool> EmitCallSiteInfo( 430 "emit-call-site-info", 431 cl::desc( 432 "Emit call site debug information, if debug information is enabled."), 433 cl::init(false)); 434 CGBINDOPT(EmitCallSiteInfo); 435 436 static cl::opt<bool> EnableDebugEntryValues( 437 "debug-entry-values", 438 cl::desc("Enable debug info for the debug entry values."), 439 cl::init(false)); 440 CGBINDOPT(EnableDebugEntryValues); 441 442 static cl::opt<bool> EnableMachineFunctionSplitter( 443 "split-machine-functions", 444 cl::desc("Split out cold basic blocks from machine functions based on " 445 "profile information"), 446 cl::init(false)); 447 CGBINDOPT(EnableMachineFunctionSplitter); 448 449 static cl::opt<bool> ForceDwarfFrameSection( 450 "force-dwarf-frame-section", 451 cl::desc("Always emit a debug frame section."), cl::init(false)); 452 CGBINDOPT(ForceDwarfFrameSection); 453 454 static cl::opt<bool> XRayOmitFunctionIndex( 455 "no-xray-index", cl::desc("Don't emit xray_fn_idx section"), 456 cl::init(false)); 457 CGBINDOPT(XRayOmitFunctionIndex); 458 459 static cl::opt<bool> DebugStrictDwarf( 460 "strict-dwarf", cl::desc("use strict dwarf"), cl::init(false)); 461 CGBINDOPT(DebugStrictDwarf); 462 463 static cl::opt<unsigned> AlignLoops("align-loops", 464 cl::desc("Default alignment for loops")); 465 CGBINDOPT(AlignLoops); 466 467 #undef CGBINDOPT 468 469 mc::RegisterMCTargetOptionsFlags(); 470 } 471 472 llvm::BasicBlockSection 473 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 474 if (getBBSections() == "all") 475 return BasicBlockSection::All; 476 else if (getBBSections() == "labels") 477 return BasicBlockSection::Labels; 478 else if (getBBSections() == "none") 479 return BasicBlockSection::None; 480 else { 481 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 482 MemoryBuffer::getFile(getBBSections()); 483 if (!MBOrErr) { 484 errs() << "Error loading basic block sections function list file: " 485 << MBOrErr.getError().message() << "\n"; 486 } else { 487 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 488 } 489 return BasicBlockSection::List; 490 } 491 } 492 493 // Common utility function tightly tied to the options listed here. Initializes 494 // a TargetOptions object with CodeGen flags and returns it. 495 TargetOptions 496 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 497 TargetOptions Options; 498 Options.AllowFPOpFusion = getFuseFPOps(); 499 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 500 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 501 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 502 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 503 Options.ApproxFuncFPMath = getEnableApproxFuncFPMath(); 504 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 505 506 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 507 508 // FIXME: Should have separate input and output flags 509 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 510 511 Options.HonorSignDependentRoundingFPMathOption = 512 getEnableHonorSignDependentRoundingFPMath(); 513 if (getFloatABIForCalls() != FloatABI::Default) 514 Options.FloatABIType = getFloatABIForCalls(); 515 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 516 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 517 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 518 Options.StackSymbolOrdering = getStackSymbolOrdering(); 519 Options.UseInitArray = !getUseCtors(); 520 Options.RelaxELFRelocations = getRelaxELFRelocations(); 521 Options.DataSections = 522 getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections()); 523 Options.FunctionSections = getFunctionSections(); 524 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 525 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 526 Options.BBSections = getBBSectionsMode(Options); 527 Options.UniqueSectionNames = getUniqueSectionNames(); 528 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 529 Options.TLSSize = getTLSSize(); 530 Options.EmulatedTLS = getEmulatedTLS(); 531 Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0; 532 Options.ExceptionModel = getExceptionModel(); 533 Options.EmitStackSizeSection = getEnableStackSizeSection(); 534 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 535 Options.EmitAddrsig = getEnableAddrsig(); 536 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 537 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 538 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 539 Options.XRayOmitFunctionIndex = getXRayOmitFunctionIndex(); 540 Options.DebugStrictDwarf = getDebugStrictDwarf(); 541 Options.LoopAlignment = getAlignLoops(); 542 543 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 544 545 Options.ThreadModel = getThreadModel(); 546 Options.EABIVersion = getEABIVersion(); 547 Options.DebuggerTuning = getDebuggerTuningOpt(); 548 Options.SwiftAsyncFramePointer = getSwiftAsyncFramePointer(); 549 return Options; 550 } 551 552 std::string codegen::getCPUStr() { 553 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 554 // this will set the CPU to an empty string which tells the target to 555 // pick a basic default. 556 if (getMCPU() == "native") 557 return std::string(sys::getHostCPUName()); 558 559 return getMCPU(); 560 } 561 562 std::string codegen::getFeaturesStr() { 563 SubtargetFeatures Features; 564 565 // If user asked for the 'native' CPU, we need to autodetect features. 566 // This is necessary for x86 where the CPU might not support all the 567 // features the autodetected CPU name lists in the target. For example, 568 // not all Sandybridge processors support AVX. 569 if (getMCPU() == "native") { 570 StringMap<bool> HostFeatures; 571 if (sys::getHostCPUFeatures(HostFeatures)) 572 for (auto &F : HostFeatures) 573 Features.AddFeature(F.first(), F.second); 574 } 575 576 for (auto const &MAttr : getMAttrs()) 577 Features.AddFeature(MAttr); 578 579 return Features.getString(); 580 } 581 582 std::vector<std::string> codegen::getFeatureList() { 583 SubtargetFeatures Features; 584 585 // If user asked for the 'native' CPU, we need to autodetect features. 586 // This is necessary for x86 where the CPU might not support all the 587 // features the autodetected CPU name lists in the target. For example, 588 // not all Sandybridge processors support AVX. 589 if (getMCPU() == "native") { 590 StringMap<bool> HostFeatures; 591 if (sys::getHostCPUFeatures(HostFeatures)) 592 for (auto &F : HostFeatures) 593 Features.AddFeature(F.first(), F.second); 594 } 595 596 for (auto const &MAttr : getMAttrs()) 597 Features.AddFeature(MAttr); 598 599 return Features.getFeatures(); 600 } 601 602 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 603 B.addAttribute(Name, Val ? "true" : "false"); 604 } 605 606 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 607 do { \ 608 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 609 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 610 } while (0) 611 612 /// Set function attributes of function \p F based on CPU, Features, and command 613 /// line flags. 614 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 615 Function &F) { 616 auto &Ctx = F.getContext(); 617 AttributeList Attrs = F.getAttributes(); 618 AttrBuilder NewAttrs(Ctx); 619 620 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 621 NewAttrs.addAttribute("target-cpu", CPU); 622 if (!Features.empty()) { 623 // Append the command line features to any that are already on the function. 624 StringRef OldFeatures = 625 F.getFnAttribute("target-features").getValueAsString(); 626 if (OldFeatures.empty()) 627 NewAttrs.addAttribute("target-features", Features); 628 else { 629 SmallString<256> Appended(OldFeatures); 630 Appended.push_back(','); 631 Appended.append(Features); 632 NewAttrs.addAttribute("target-features", Appended); 633 } 634 } 635 if (FramePointerUsageView->getNumOccurrences() > 0 && 636 !F.hasFnAttribute("frame-pointer")) { 637 if (getFramePointerUsage() == FramePointerKind::All) 638 NewAttrs.addAttribute("frame-pointer", "all"); 639 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 640 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 641 else if (getFramePointerUsage() == FramePointerKind::None) 642 NewAttrs.addAttribute("frame-pointer", "none"); 643 } 644 if (DisableTailCallsView->getNumOccurrences() > 0) 645 NewAttrs.addAttribute("disable-tail-calls", 646 toStringRef(getDisableTailCalls())); 647 if (getStackRealign()) 648 NewAttrs.addAttribute("stackrealign"); 649 650 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 651 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 652 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 653 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 654 HANDLE_BOOL_ATTR(EnableApproxFuncFPMathView, "approx-func-fp-math"); 655 656 if (DenormalFPMathView->getNumOccurrences() > 0 && 657 !F.hasFnAttribute("denormal-fp-math")) { 658 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 659 660 // FIXME: Command line flag should expose separate input/output modes. 661 NewAttrs.addAttribute("denormal-fp-math", 662 DenormalMode(DenormKind, DenormKind).str()); 663 } 664 665 if (DenormalFP32MathView->getNumOccurrences() > 0 && 666 !F.hasFnAttribute("denormal-fp-math-f32")) { 667 // FIXME: Command line flag should expose separate input/output modes. 668 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 669 670 NewAttrs.addAttribute( 671 "denormal-fp-math-f32", 672 DenormalMode(DenormKind, DenormKind).str()); 673 } 674 675 if (TrapFuncNameView->getNumOccurrences() > 0) 676 for (auto &B : F) 677 for (auto &I : B) 678 if (auto *Call = dyn_cast<CallInst>(&I)) 679 if (const auto *F = Call->getCalledFunction()) 680 if (F->getIntrinsicID() == Intrinsic::debugtrap || 681 F->getIntrinsicID() == Intrinsic::trap) 682 Call->addFnAttr( 683 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 684 685 // Let NewAttrs override Attrs. 686 F.setAttributes(Attrs.addFnAttributes(Ctx, NewAttrs)); 687 } 688 689 /// Set function attributes of functions in Module M based on CPU, 690 /// Features, and command line flags. 691 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 692 Module &M) { 693 for (Function &F : M) 694 setFunctionAttributes(CPU, Features, F); 695 } 696 697