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