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/ADT/StringExtras.h" 17 #include "llvm/IR/Instructions.h" 18 #include "llvm/IR/Intrinsics.h" 19 #include "llvm/IR/Module.h" 20 #include "llvm/MC/MCTargetOptionsCommandFlags.h" 21 #include "llvm/Support/CommandLine.h" 22 #include "llvm/Support/MemoryBuffer.h" 23 #include "llvm/TargetParser/Host.h" 24 #include "llvm/TargetParser/SubtargetFeature.h" 25 #include "llvm/TargetParser/Triple.h" 26 #include <optional> 27 28 using namespace llvm; 29 30 #define CGOPT(TY, NAME) \ 31 static cl::opt<TY> *NAME##View; \ 32 TY codegen::get##NAME() { \ 33 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 34 return *NAME##View; \ 35 } 36 37 #define CGLIST(TY, NAME) \ 38 static cl::list<TY> *NAME##View; \ 39 std::vector<TY> codegen::get##NAME() { \ 40 assert(NAME##View && "RegisterCodeGenFlags not created."); \ 41 return *NAME##View; \ 42 } 43 44 // Temporary macro for incremental transition to std::optional. 45 #define CGOPT_EXP(TY, NAME) \ 46 CGOPT(TY, NAME) \ 47 std::optional<TY> codegen::getExplicit##NAME() { \ 48 if (NAME##View->getNumOccurrences()) { \ 49 TY res = *NAME##View; \ 50 return res; \ 51 } \ 52 return std::nullopt; \ 53 } 54 55 CGOPT(std::string, MArch) 56 CGOPT(std::string, MCPU) 57 CGLIST(std::string, MAttrs) 58 CGOPT_EXP(Reloc::Model, RelocModel) 59 CGOPT(ThreadModel::Model, ThreadModel) 60 CGOPT_EXP(CodeModel::Model, CodeModel) 61 CGOPT(ExceptionHandling, ExceptionModel) 62 CGOPT_EXP(CodeGenFileType, FileType) 63 CGOPT(FramePointerKind, FramePointerUsage) 64 CGOPT(bool, EnableUnsafeFPMath) 65 CGOPT(bool, EnableNoInfsFPMath) 66 CGOPT(bool, EnableNoNaNsFPMath) 67 CGOPT(bool, EnableNoSignedZerosFPMath) 68 CGOPT(bool, EnableApproxFuncFPMath) 69 CGOPT(bool, EnableNoTrappingFPMath) 70 CGOPT(bool, EnableAIXExtendedAltivecABI) 71 CGOPT(DenormalMode::DenormalModeKind, DenormalFPMath) 72 CGOPT(DenormalMode::DenormalModeKind, DenormalFP32Math) 73 CGOPT(bool, EnableHonorSignDependentRoundingFPMath) 74 CGOPT(FloatABI::ABIType, FloatABIForCalls) 75 CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) 76 CGOPT(SwiftAsyncFramePointerMode, SwiftAsyncFramePointer) 77 CGOPT(bool, DontPlaceZerosInBSS) 78 CGOPT(bool, EnableGuaranteedTailCallOpt) 79 CGOPT(bool, DisableTailCalls) 80 CGOPT(bool, StackSymbolOrdering) 81 CGOPT(bool, StackRealign) 82 CGOPT(std::string, TrapFuncName) 83 CGOPT(bool, UseCtors) 84 CGOPT(bool, DisableIntegratedAS) 85 CGOPT(bool, RelaxELFRelocations) 86 CGOPT_EXP(bool, DataSections) 87 CGOPT_EXP(bool, FunctionSections) 88 CGOPT(bool, IgnoreXCOFFVisibility) 89 CGOPT(bool, XCOFFTracebackTable) 90 CGOPT(std::string, BBSections) 91 CGOPT(unsigned, TLSSize) 92 CGOPT_EXP(bool, EmulatedTLS) 93 CGOPT(bool, UniqueSectionNames) 94 CGOPT(bool, UniqueBasicBlockSectionNames) 95 CGOPT(EABI, EABIVersion) 96 CGOPT(DebuggerKind, DebuggerTuningOpt) 97 CGOPT(bool, EnableStackSizeSection) 98 CGOPT(bool, EnableAddrsig) 99 CGOPT(bool, EmitCallSiteInfo) 100 CGOPT(bool, EnableMachineFunctionSplitter) 101 CGOPT(bool, EnableDebugEntryValues) 102 CGOPT(bool, ForceDwarfFrameSection) 103 CGOPT(bool, XRayFunctionIndex) 104 CGOPT(bool, DebugStrictDwarf) 105 CGOPT(unsigned, AlignLoops) 106 CGOPT(bool, JMCInstrument) 107 CGOPT(bool, XCOFFReadOnlyPointers) 108 109 codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { 110 #define CGBINDOPT(NAME) \ 111 do { \ 112 NAME##View = std::addressof(NAME); \ 113 } while (0) 114 115 static cl::opt<std::string> MArch( 116 "march", cl::desc("Architecture to generate code for (see --version)")); 117 CGBINDOPT(MArch); 118 119 static cl::opt<std::string> MCPU( 120 "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"), 121 cl::value_desc("cpu-name"), cl::init("")); 122 CGBINDOPT(MCPU); 123 124 static cl::list<std::string> MAttrs( 125 "mattr", cl::CommaSeparated, 126 cl::desc("Target specific attributes (-mattr=help for details)"), 127 cl::value_desc("a1,+a2,-a3,...")); 128 CGBINDOPT(MAttrs); 129 130 static cl::opt<Reloc::Model> RelocModel( 131 "relocation-model", cl::desc("Choose relocation model"), 132 cl::values( 133 clEnumValN(Reloc::Static, "static", "Non-relocatable code"), 134 clEnumValN(Reloc::PIC_, "pic", 135 "Fully relocatable, position independent code"), 136 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 137 "Relocatable external references, non-relocatable code"), 138 clEnumValN( 139 Reloc::ROPI, "ropi", 140 "Code and read-only data relocatable, accessed PC-relative"), 141 clEnumValN( 142 Reloc::RWPI, "rwpi", 143 "Read-write data relocatable, accessed relative to static base"), 144 clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", 145 "Combination of ropi and rwpi"))); 146 CGBINDOPT(RelocModel); 147 148 static cl::opt<ThreadModel::Model> ThreadModel( 149 "thread-model", cl::desc("Choose threading model"), 150 cl::init(ThreadModel::POSIX), 151 cl::values( 152 clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"), 153 clEnumValN(ThreadModel::Single, "single", "Single thread model"))); 154 CGBINDOPT(ThreadModel); 155 156 static cl::opt<CodeModel::Model> CodeModel( 157 "code-model", cl::desc("Choose code model"), 158 cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"), 159 clEnumValN(CodeModel::Small, "small", "Small code model"), 160 clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"), 161 clEnumValN(CodeModel::Medium, "medium", "Medium code model"), 162 clEnumValN(CodeModel::Large, "large", "Large code model"))); 163 CGBINDOPT(CodeModel); 164 165 static cl::opt<ExceptionHandling> ExceptionModel( 166 "exception-model", cl::desc("exception model"), 167 cl::init(ExceptionHandling::None), 168 cl::values( 169 clEnumValN(ExceptionHandling::None, "default", 170 "default exception handling model"), 171 clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", 172 "DWARF-like CFI based exception handling"), 173 clEnumValN(ExceptionHandling::SjLj, "sjlj", 174 "SjLj exception handling"), 175 clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), 176 clEnumValN(ExceptionHandling::WinEH, "wineh", 177 "Windows exception model"), 178 clEnumValN(ExceptionHandling::Wasm, "wasm", 179 "WebAssembly exception handling"))); 180 CGBINDOPT(ExceptionModel); 181 182 static cl::opt<CodeGenFileType> FileType( 183 "filetype", cl::init(CGFT_AssemblyFile), 184 cl::desc( 185 "Choose a file type (not all types are supported by all targets):"), 186 cl::values( 187 clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"), 188 clEnumValN(CGFT_ObjectFile, "obj", 189 "Emit a native object ('.o') file"), 190 clEnumValN(CGFT_Null, "null", 191 "Emit nothing, for performance testing"))); 192 CGBINDOPT(FileType); 193 194 static cl::opt<FramePointerKind> FramePointerUsage( 195 "frame-pointer", 196 cl::desc("Specify frame pointer elimination optimization"), 197 cl::init(FramePointerKind::None), 198 cl::values( 199 clEnumValN(FramePointerKind::All, "all", 200 "Disable frame pointer elimination"), 201 clEnumValN(FramePointerKind::NonLeaf, "non-leaf", 202 "Disable frame pointer elimination for non-leaf frame"), 203 clEnumValN(FramePointerKind::None, "none", 204 "Enable frame pointer elimination"))); 205 CGBINDOPT(FramePointerUsage); 206 207 static cl::opt<bool> EnableUnsafeFPMath( 208 "enable-unsafe-fp-math", 209 cl::desc("Enable optimizations that may decrease FP precision"), 210 cl::init(false)); 211 CGBINDOPT(EnableUnsafeFPMath); 212 213 static cl::opt<bool> EnableNoInfsFPMath( 214 "enable-no-infs-fp-math", 215 cl::desc("Enable FP math optimizations that assume no +-Infs"), 216 cl::init(false)); 217 CGBINDOPT(EnableNoInfsFPMath); 218 219 static cl::opt<bool> EnableNoNaNsFPMath( 220 "enable-no-nans-fp-math", 221 cl::desc("Enable FP math optimizations that assume no NaNs"), 222 cl::init(false)); 223 CGBINDOPT(EnableNoNaNsFPMath); 224 225 static cl::opt<bool> EnableNoSignedZerosFPMath( 226 "enable-no-signed-zeros-fp-math", 227 cl::desc("Enable FP math optimizations that assume " 228 "the sign of 0 is insignificant"), 229 cl::init(false)); 230 CGBINDOPT(EnableNoSignedZerosFPMath); 231 232 static cl::opt<bool> EnableApproxFuncFPMath( 233 "enable-approx-func-fp-math", 234 cl::desc("Enable FP math optimizations that assume approx func"), 235 cl::init(false)); 236 CGBINDOPT(EnableApproxFuncFPMath); 237 238 static cl::opt<bool> EnableNoTrappingFPMath( 239 "enable-no-trapping-fp-math", 240 cl::desc("Enable setting the FP exceptions build " 241 "attribute not to use exceptions"), 242 cl::init(false)); 243 CGBINDOPT(EnableNoTrappingFPMath); 244 245 static const auto DenormFlagEnumOptions = cl::values( 246 clEnumValN(DenormalMode::IEEE, "ieee", "IEEE 754 denormal numbers"), 247 clEnumValN(DenormalMode::PreserveSign, "preserve-sign", 248 "the sign of a flushed-to-zero number is preserved " 249 "in the sign of 0"), 250 clEnumValN(DenormalMode::PositiveZero, "positive-zero", 251 "denormals are flushed to positive zero"), 252 clEnumValN(DenormalMode::Dynamic, "dynamic", 253 "denormals have unknown treatment")); 254 255 // FIXME: Doesn't have way to specify separate input and output modes. 256 static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( 257 "denormal-fp-math", 258 cl::desc("Select which denormal numbers the code is permitted to require"), 259 cl::init(DenormalMode::IEEE), 260 DenormFlagEnumOptions); 261 CGBINDOPT(DenormalFPMath); 262 263 static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( 264 "denormal-fp-math-f32", 265 cl::desc("Select which denormal numbers the code is permitted to require for float"), 266 cl::init(DenormalMode::Invalid), 267 DenormFlagEnumOptions); 268 CGBINDOPT(DenormalFP32Math); 269 270 static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( 271 "enable-sign-dependent-rounding-fp-math", cl::Hidden, 272 cl::desc("Force codegen to assume rounding mode can change dynamically"), 273 cl::init(false)); 274 CGBINDOPT(EnableHonorSignDependentRoundingFPMath); 275 276 static cl::opt<FloatABI::ABIType> FloatABIForCalls( 277 "float-abi", cl::desc("Choose float ABI type"), 278 cl::init(FloatABI::Default), 279 cl::values(clEnumValN(FloatABI::Default, "default", 280 "Target default float ABI type"), 281 clEnumValN(FloatABI::Soft, "soft", 282 "Soft float ABI (implied by -soft-float)"), 283 clEnumValN(FloatABI::Hard, "hard", 284 "Hard float ABI (uses FP registers)"))); 285 CGBINDOPT(FloatABIForCalls); 286 287 static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( 288 "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"), 289 cl::init(FPOpFusion::Standard), 290 cl::values( 291 clEnumValN(FPOpFusion::Fast, "fast", 292 "Fuse FP ops whenever profitable"), 293 clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."), 294 clEnumValN(FPOpFusion::Strict, "off", 295 "Only fuse FP ops when the result won't be affected."))); 296 CGBINDOPT(FuseFPOps); 297 298 static cl::opt<SwiftAsyncFramePointerMode> SwiftAsyncFramePointer( 299 "swift-async-fp", 300 cl::desc("Determine when the Swift async frame pointer should be set"), 301 cl::init(SwiftAsyncFramePointerMode::Always), 302 cl::values(clEnumValN(SwiftAsyncFramePointerMode::DeploymentBased, "auto", 303 "Determine based on deployment target"), 304 clEnumValN(SwiftAsyncFramePointerMode::Always, "always", 305 "Always set the bit"), 306 clEnumValN(SwiftAsyncFramePointerMode::Never, "never", 307 "Never set the bit"))); 308 CGBINDOPT(SwiftAsyncFramePointer); 309 310 static cl::opt<bool> DontPlaceZerosInBSS( 311 "nozero-initialized-in-bss", 312 cl::desc("Don't place zero-initialized symbols into bss section"), 313 cl::init(false)); 314 CGBINDOPT(DontPlaceZerosInBSS); 315 316 static cl::opt<bool> EnableAIXExtendedAltivecABI( 317 "vec-extabi", cl::desc("Enable the AIX Extended Altivec ABI."), 318 cl::init(false)); 319 CGBINDOPT(EnableAIXExtendedAltivecABI); 320 321 static cl::opt<bool> EnableGuaranteedTailCallOpt( 322 "tailcallopt", 323 cl::desc( 324 "Turn fastcc calls into tail calls by (potentially) changing ABI."), 325 cl::init(false)); 326 CGBINDOPT(EnableGuaranteedTailCallOpt); 327 328 static cl::opt<bool> DisableTailCalls( 329 "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false)); 330 CGBINDOPT(DisableTailCalls); 331 332 static cl::opt<bool> StackSymbolOrdering( 333 "stack-symbol-ordering", cl::desc("Order local stack symbols."), 334 cl::init(true)); 335 CGBINDOPT(StackSymbolOrdering); 336 337 static cl::opt<bool> StackRealign( 338 "stackrealign", 339 cl::desc("Force align the stack to the minimum alignment"), 340 cl::init(false)); 341 CGBINDOPT(StackRealign); 342 343 static cl::opt<std::string> TrapFuncName( 344 "trap-func", cl::Hidden, 345 cl::desc("Emit a call to trap function rather than a trap instruction"), 346 cl::init("")); 347 CGBINDOPT(TrapFuncName); 348 349 static cl::opt<bool> UseCtors("use-ctors", 350 cl::desc("Use .ctors instead of .init_array."), 351 cl::init(false)); 352 CGBINDOPT(UseCtors); 353 354 static cl::opt<bool> RelaxELFRelocations( 355 "relax-elf-relocations", 356 cl::desc( 357 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), 358 cl::init(true)); 359 CGBINDOPT(RelaxELFRelocations); 360 361 static cl::opt<bool> DataSections( 362 "data-sections", cl::desc("Emit data into separate sections"), 363 cl::init(false)); 364 CGBINDOPT(DataSections); 365 366 static cl::opt<bool> FunctionSections( 367 "function-sections", cl::desc("Emit functions into separate sections"), 368 cl::init(false)); 369 CGBINDOPT(FunctionSections); 370 371 static cl::opt<bool> IgnoreXCOFFVisibility( 372 "ignore-xcoff-visibility", 373 cl::desc("Not emit the visibility attribute for asm in AIX OS or give " 374 "all symbols 'unspecified' visibility in XCOFF object file"), 375 cl::init(false)); 376 CGBINDOPT(IgnoreXCOFFVisibility); 377 378 static cl::opt<bool> XCOFFTracebackTable( 379 "xcoff-traceback-table", cl::desc("Emit the XCOFF traceback table"), 380 cl::init(true)); 381 CGBINDOPT(XCOFFTracebackTable); 382 383 static cl::opt<std::string> BBSections( 384 "basic-block-sections", 385 cl::desc("Emit basic blocks into separate sections"), 386 cl::value_desc("all | <function list (file)> | labels | none"), 387 cl::init("none")); 388 CGBINDOPT(BBSections); 389 390 static cl::opt<unsigned> TLSSize( 391 "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0)); 392 CGBINDOPT(TLSSize); 393 394 static cl::opt<bool> EmulatedTLS( 395 "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false)); 396 CGBINDOPT(EmulatedTLS); 397 398 static cl::opt<bool> UniqueSectionNames( 399 "unique-section-names", cl::desc("Give unique names to every section"), 400 cl::init(true)); 401 CGBINDOPT(UniqueSectionNames); 402 403 static cl::opt<bool> UniqueBasicBlockSectionNames( 404 "unique-basic-block-section-names", 405 cl::desc("Give unique names to every basic block section"), 406 cl::init(false)); 407 CGBINDOPT(UniqueBasicBlockSectionNames); 408 409 static cl::opt<EABI> EABIVersion( 410 "meabi", cl::desc("Set EABI type (default depends on triple):"), 411 cl::init(EABI::Default), 412 cl::values( 413 clEnumValN(EABI::Default, "default", "Triple default EABI version"), 414 clEnumValN(EABI::EABI4, "4", "EABI version 4"), 415 clEnumValN(EABI::EABI5, "5", "EABI version 5"), 416 clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); 417 CGBINDOPT(EABIVersion); 418 419 static cl::opt<DebuggerKind> DebuggerTuningOpt( 420 "debugger-tune", cl::desc("Tune debug info for a particular debugger"), 421 cl::init(DebuggerKind::Default), 422 cl::values( 423 clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), 424 clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), 425 clEnumValN(DebuggerKind::DBX, "dbx", "dbx"), 426 clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); 427 CGBINDOPT(DebuggerTuningOpt); 428 429 static cl::opt<bool> EnableStackSizeSection( 430 "stack-size-section", 431 cl::desc("Emit a section containing stack size metadata"), 432 cl::init(false)); 433 CGBINDOPT(EnableStackSizeSection); 434 435 static cl::opt<bool> EnableAddrsig( 436 "addrsig", cl::desc("Emit an address-significance table"), 437 cl::init(false)); 438 CGBINDOPT(EnableAddrsig); 439 440 static cl::opt<bool> EmitCallSiteInfo( 441 "emit-call-site-info", 442 cl::desc( 443 "Emit call site debug information, if debug information is enabled."), 444 cl::init(false)); 445 CGBINDOPT(EmitCallSiteInfo); 446 447 static cl::opt<bool> EnableDebugEntryValues( 448 "debug-entry-values", 449 cl::desc("Enable debug info for the debug entry values."), 450 cl::init(false)); 451 CGBINDOPT(EnableDebugEntryValues); 452 453 static cl::opt<bool> EnableMachineFunctionSplitter( 454 "split-machine-functions", 455 cl::desc("Split out cold basic blocks from machine functions based on " 456 "profile information"), 457 cl::init(false)); 458 CGBINDOPT(EnableMachineFunctionSplitter); 459 460 static cl::opt<bool> ForceDwarfFrameSection( 461 "force-dwarf-frame-section", 462 cl::desc("Always emit a debug frame section."), cl::init(false)); 463 CGBINDOPT(ForceDwarfFrameSection); 464 465 static cl::opt<bool> XRayFunctionIndex("xray-function-index", 466 cl::desc("Emit xray_fn_idx section"), 467 cl::init(true)); 468 CGBINDOPT(XRayFunctionIndex); 469 470 static cl::opt<bool> DebugStrictDwarf( 471 "strict-dwarf", cl::desc("use strict dwarf"), cl::init(false)); 472 CGBINDOPT(DebugStrictDwarf); 473 474 static cl::opt<unsigned> AlignLoops("align-loops", 475 cl::desc("Default alignment for loops")); 476 CGBINDOPT(AlignLoops); 477 478 static cl::opt<bool> JMCInstrument( 479 "enable-jmc-instrument", 480 cl::desc("Instrument functions with a call to __CheckForDebuggerJustMyCode"), 481 cl::init(false)); 482 CGBINDOPT(JMCInstrument); 483 484 static cl::opt<bool> XCOFFReadOnlyPointers( 485 "mxcoff-roptr", 486 cl::desc("When set to true, const objects with relocatable address " 487 "values are put into the RO data section."), 488 cl::init(false)); 489 CGBINDOPT(XCOFFReadOnlyPointers); 490 491 static cl::opt<bool> DisableIntegratedAS( 492 "no-integrated-as", cl::desc("Disable integrated assembler"), 493 cl::init(false)); 494 CGBINDOPT(DisableIntegratedAS); 495 496 #undef CGBINDOPT 497 498 mc::RegisterMCTargetOptionsFlags(); 499 } 500 501 llvm::BasicBlockSection 502 codegen::getBBSectionsMode(llvm::TargetOptions &Options) { 503 if (getBBSections() == "all") 504 return BasicBlockSection::All; 505 else if (getBBSections() == "labels") 506 return BasicBlockSection::Labels; 507 else if (getBBSections() == "none") 508 return BasicBlockSection::None; 509 else { 510 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = 511 MemoryBuffer::getFile(getBBSections()); 512 if (!MBOrErr) { 513 errs() << "Error loading basic block sections function list file: " 514 << MBOrErr.getError().message() << "\n"; 515 } else { 516 Options.BBSectionsFuncListBuf = std::move(*MBOrErr); 517 } 518 return BasicBlockSection::List; 519 } 520 } 521 522 // Common utility function tightly tied to the options listed here. Initializes 523 // a TargetOptions object with CodeGen flags and returns it. 524 TargetOptions 525 codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { 526 TargetOptions Options; 527 Options.AllowFPOpFusion = getFuseFPOps(); 528 Options.UnsafeFPMath = getEnableUnsafeFPMath(); 529 Options.NoInfsFPMath = getEnableNoInfsFPMath(); 530 Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); 531 Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); 532 Options.ApproxFuncFPMath = getEnableApproxFuncFPMath(); 533 Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); 534 535 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 536 537 // FIXME: Should have separate input and output flags 538 Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); 539 540 Options.HonorSignDependentRoundingFPMathOption = 541 getEnableHonorSignDependentRoundingFPMath(); 542 if (getFloatABIForCalls() != FloatABI::Default) 543 Options.FloatABIType = getFloatABIForCalls(); 544 Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); 545 Options.NoZerosInBSS = getDontPlaceZerosInBSS(); 546 Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); 547 Options.StackSymbolOrdering = getStackSymbolOrdering(); 548 Options.UseInitArray = !getUseCtors(); 549 Options.DisableIntegratedAS = getDisableIntegratedAS(); 550 Options.RelaxELFRelocations = getRelaxELFRelocations(); 551 Options.DataSections = 552 getExplicitDataSections().value_or(TheTriple.hasDefaultDataSections()); 553 Options.FunctionSections = getFunctionSections(); 554 Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 555 Options.XCOFFTracebackTable = getXCOFFTracebackTable(); 556 Options.BBSections = getBBSectionsMode(Options); 557 Options.UniqueSectionNames = getUniqueSectionNames(); 558 Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); 559 Options.TLSSize = getTLSSize(); 560 Options.EmulatedTLS = 561 getExplicitEmulatedTLS().value_or(TheTriple.hasDefaultEmulatedTLS()); 562 Options.ExceptionModel = getExceptionModel(); 563 Options.EmitStackSizeSection = getEnableStackSizeSection(); 564 Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); 565 Options.EmitAddrsig = getEnableAddrsig(); 566 Options.EmitCallSiteInfo = getEmitCallSiteInfo(); 567 Options.EnableDebugEntryValues = getEnableDebugEntryValues(); 568 Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); 569 Options.XRayFunctionIndex = getXRayFunctionIndex(); 570 Options.DebugStrictDwarf = getDebugStrictDwarf(); 571 Options.LoopAlignment = getAlignLoops(); 572 Options.JMCInstrument = getJMCInstrument(); 573 Options.XCOFFReadOnlyPointers = getXCOFFReadOnlyPointers(); 574 575 Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); 576 577 Options.ThreadModel = getThreadModel(); 578 Options.EABIVersion = getEABIVersion(); 579 Options.DebuggerTuning = getDebuggerTuningOpt(); 580 Options.SwiftAsyncFramePointer = getSwiftAsyncFramePointer(); 581 return Options; 582 } 583 584 std::string codegen::getCPUStr() { 585 // If user asked for the 'native' CPU, autodetect here. If autodection fails, 586 // this will set the CPU to an empty string which tells the target to 587 // pick a basic default. 588 if (getMCPU() == "native") 589 return std::string(sys::getHostCPUName()); 590 591 return getMCPU(); 592 } 593 594 std::string codegen::getFeaturesStr() { 595 SubtargetFeatures Features; 596 597 // If user asked for the 'native' CPU, we need to autodetect features. 598 // This is necessary for x86 where the CPU might not support all the 599 // features the autodetected CPU name lists in the target. For example, 600 // not all Sandybridge processors support AVX. 601 if (getMCPU() == "native") { 602 StringMap<bool> HostFeatures; 603 if (sys::getHostCPUFeatures(HostFeatures)) 604 for (const auto &[Feature, IsEnabled] : HostFeatures) 605 Features.AddFeature(Feature, IsEnabled); 606 } 607 608 for (auto const &MAttr : getMAttrs()) 609 Features.AddFeature(MAttr); 610 611 return Features.getString(); 612 } 613 614 std::vector<std::string> codegen::getFeatureList() { 615 SubtargetFeatures Features; 616 617 // If user asked for the 'native' CPU, we need to autodetect features. 618 // This is necessary for x86 where the CPU might not support all the 619 // features the autodetected CPU name lists in the target. For example, 620 // not all Sandybridge processors support AVX. 621 if (getMCPU() == "native") { 622 StringMap<bool> HostFeatures; 623 if (sys::getHostCPUFeatures(HostFeatures)) 624 for (const auto &[Feature, IsEnabled] : HostFeatures) 625 Features.AddFeature(Feature, IsEnabled); 626 } 627 628 for (auto const &MAttr : getMAttrs()) 629 Features.AddFeature(MAttr); 630 631 return Features.getFeatures(); 632 } 633 634 void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { 635 B.addAttribute(Name, Val ? "true" : "false"); 636 } 637 638 #define HANDLE_BOOL_ATTR(CL, AttrName) \ 639 do { \ 640 if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ 641 renderBoolStringAttr(NewAttrs, AttrName, *CL); \ 642 } while (0) 643 644 /// Set function attributes of function \p F based on CPU, Features, and command 645 /// line flags. 646 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 647 Function &F) { 648 auto &Ctx = F.getContext(); 649 AttributeList Attrs = F.getAttributes(); 650 AttrBuilder NewAttrs(Ctx); 651 652 if (!CPU.empty() && !F.hasFnAttribute("target-cpu")) 653 NewAttrs.addAttribute("target-cpu", CPU); 654 if (!Features.empty()) { 655 // Append the command line features to any that are already on the function. 656 StringRef OldFeatures = 657 F.getFnAttribute("target-features").getValueAsString(); 658 if (OldFeatures.empty()) 659 NewAttrs.addAttribute("target-features", Features); 660 else { 661 SmallString<256> Appended(OldFeatures); 662 Appended.push_back(','); 663 Appended.append(Features); 664 NewAttrs.addAttribute("target-features", Appended); 665 } 666 } 667 if (FramePointerUsageView->getNumOccurrences() > 0 && 668 !F.hasFnAttribute("frame-pointer")) { 669 if (getFramePointerUsage() == FramePointerKind::All) 670 NewAttrs.addAttribute("frame-pointer", "all"); 671 else if (getFramePointerUsage() == FramePointerKind::NonLeaf) 672 NewAttrs.addAttribute("frame-pointer", "non-leaf"); 673 else if (getFramePointerUsage() == FramePointerKind::None) 674 NewAttrs.addAttribute("frame-pointer", "none"); 675 } 676 if (DisableTailCallsView->getNumOccurrences() > 0) 677 NewAttrs.addAttribute("disable-tail-calls", 678 toStringRef(getDisableTailCalls())); 679 if (getStackRealign()) 680 NewAttrs.addAttribute("stackrealign"); 681 682 HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math"); 683 HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math"); 684 HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math"); 685 HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math"); 686 HANDLE_BOOL_ATTR(EnableApproxFuncFPMathView, "approx-func-fp-math"); 687 688 if (DenormalFPMathView->getNumOccurrences() > 0 && 689 !F.hasFnAttribute("denormal-fp-math")) { 690 DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); 691 692 // FIXME: Command line flag should expose separate input/output modes. 693 NewAttrs.addAttribute("denormal-fp-math", 694 DenormalMode(DenormKind, DenormKind).str()); 695 } 696 697 if (DenormalFP32MathView->getNumOccurrences() > 0 && 698 !F.hasFnAttribute("denormal-fp-math-f32")) { 699 // FIXME: Command line flag should expose separate input/output modes. 700 DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); 701 702 NewAttrs.addAttribute( 703 "denormal-fp-math-f32", 704 DenormalMode(DenormKind, DenormKind).str()); 705 } 706 707 if (TrapFuncNameView->getNumOccurrences() > 0) 708 for (auto &B : F) 709 for (auto &I : B) 710 if (auto *Call = dyn_cast<CallInst>(&I)) 711 if (const auto *F = Call->getCalledFunction()) 712 if (F->getIntrinsicID() == Intrinsic::debugtrap || 713 F->getIntrinsicID() == Intrinsic::trap) 714 Call->addFnAttr( 715 Attribute::get(Ctx, "trap-func-name", getTrapFuncName())); 716 717 // Let NewAttrs override Attrs. 718 F.setAttributes(Attrs.addFnAttributes(Ctx, NewAttrs)); 719 } 720 721 /// Set function attributes of functions in Module M based on CPU, 722 /// Features, and command line flags. 723 void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, 724 Module &M) { 725 for (Function &F : M) 726 setFunctionAttributes(CPU, Features, F); 727 } 728