1 //===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===// 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 is the llc code generator driver. It provides a convenient 10 // command-line interface for generating native assembly-language code 11 // or C code, given LLVM bitcode. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/ADT/STLExtras.h" 16 #include "llvm/ADT/Triple.h" 17 #include "llvm/Analysis/TargetLibraryInfo.h" 18 #include "llvm/CodeGen/CommandFlags.h" 19 #include "llvm/CodeGen/LinkAllAsmWriterComponents.h" 20 #include "llvm/CodeGen/LinkAllCodegenComponents.h" 21 #include "llvm/CodeGen/MIRParser/MIRParser.h" 22 #include "llvm/CodeGen/MachineFunctionPass.h" 23 #include "llvm/CodeGen/MachineModuleInfo.h" 24 #include "llvm/CodeGen/TargetPassConfig.h" 25 #include "llvm/CodeGen/TargetSubtargetInfo.h" 26 #include "llvm/IR/AutoUpgrade.h" 27 #include "llvm/IR/DataLayout.h" 28 #include "llvm/IR/DiagnosticInfo.h" 29 #include "llvm/IR/DiagnosticPrinter.h" 30 #include "llvm/IR/IRPrintingPasses.h" 31 #include "llvm/IR/LLVMContext.h" 32 #include "llvm/IR/LLVMRemarkStreamer.h" 33 #include "llvm/IR/LegacyPassManager.h" 34 #include "llvm/IR/Module.h" 35 #include "llvm/IR/Verifier.h" 36 #include "llvm/IRReader/IRReader.h" 37 #include "llvm/InitializePasses.h" 38 #include "llvm/MC/SubtargetFeature.h" 39 #include "llvm/Pass.h" 40 #include "llvm/Support/CommandLine.h" 41 #include "llvm/Support/Debug.h" 42 #include "llvm/Support/FileSystem.h" 43 #include "llvm/Support/FormattedStream.h" 44 #include "llvm/Support/Host.h" 45 #include "llvm/Support/InitLLVM.h" 46 #include "llvm/Support/ManagedStatic.h" 47 #include "llvm/Support/PluginLoader.h" 48 #include "llvm/Support/SourceMgr.h" 49 #include "llvm/Support/TargetRegistry.h" 50 #include "llvm/Support/TargetSelect.h" 51 #include "llvm/Support/ToolOutputFile.h" 52 #include "llvm/Support/WithColor.h" 53 #include "llvm/Target/TargetLoweringObjectFile.h" 54 #include "llvm/Target/TargetMachine.h" 55 #include "llvm/Transforms/Utils/Cloning.h" 56 #include <memory> 57 using namespace llvm; 58 59 static codegen::RegisterCodeGenFlags CGF; 60 61 // General options for llc. Other pass-specific options are specified 62 // within the corresponding llc passes, and target-specific options 63 // and back-end code generation options are specified with the target machine. 64 // 65 static cl::opt<std::string> 66 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); 67 68 static cl::opt<std::string> 69 InputLanguage("x", cl::desc("Input language ('ir' or 'mir')")); 70 71 static cl::opt<std::string> 72 OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); 73 74 static cl::opt<std::string> 75 SplitDwarfOutputFile("split-dwarf-output", 76 cl::desc(".dwo output filename"), 77 cl::value_desc("filename")); 78 79 static cl::opt<unsigned> 80 TimeCompilations("time-compilations", cl::Hidden, cl::init(1u), 81 cl::value_desc("N"), 82 cl::desc("Repeat compilation N times for timing")); 83 84 static cl::opt<bool> 85 NoIntegratedAssembler("no-integrated-as", cl::Hidden, 86 cl::desc("Disable integrated assembler")); 87 88 static cl::opt<bool> 89 PreserveComments("preserve-as-comments", cl::Hidden, 90 cl::desc("Preserve Comments in outputted assembly"), 91 cl::init(true)); 92 93 // Determine optimization level. 94 static cl::opt<char> 95 OptLevel("O", 96 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " 97 "(default = '-O2')"), 98 cl::Prefix, 99 cl::ZeroOrMore, 100 cl::init(' ')); 101 102 static cl::opt<std::string> 103 TargetTriple("mtriple", cl::desc("Override target triple for module")); 104 105 static cl::opt<std::string> SplitDwarfFile( 106 "split-dwarf-file", 107 cl::desc( 108 "Specify the name of the .dwo file to encode in the DWARF output")); 109 110 static cl::opt<bool> NoVerify("disable-verify", cl::Hidden, 111 cl::desc("Do not verify input module")); 112 113 static cl::opt<bool> DisableSimplifyLibCalls("disable-simplify-libcalls", 114 cl::desc("Disable simplify-libcalls")); 115 116 static cl::opt<bool> ShowMCEncoding("show-mc-encoding", cl::Hidden, 117 cl::desc("Show encoding in .s output")); 118 119 static cl::opt<bool> EnableDwarfDirectory( 120 "enable-dwarf-directory", cl::Hidden, 121 cl::desc("Use .file directives with an explicit directory.")); 122 123 static cl::opt<bool> AsmVerbose("asm-verbose", 124 cl::desc("Add comments to directives."), 125 cl::init(true)); 126 127 static cl::opt<bool> 128 CompileTwice("compile-twice", cl::Hidden, 129 cl::desc("Run everything twice, re-using the same pass " 130 "manager and verify the result is the same."), 131 cl::init(false)); 132 133 static cl::opt<bool> DiscardValueNames( 134 "discard-value-names", 135 cl::desc("Discard names from Value (other than GlobalValue)."), 136 cl::init(false), cl::Hidden); 137 138 static cl::list<std::string> IncludeDirs("I", cl::desc("include search path")); 139 140 static cl::opt<bool> RemarksWithHotness( 141 "pass-remarks-with-hotness", 142 cl::desc("With PGO, include profile count in optimization remarks"), 143 cl::Hidden); 144 145 static cl::opt<unsigned> 146 RemarksHotnessThreshold("pass-remarks-hotness-threshold", 147 cl::desc("Minimum profile count required for " 148 "an optimization remark to be output"), 149 cl::Hidden); 150 151 static cl::opt<std::string> 152 RemarksFilename("pass-remarks-output", 153 cl::desc("Output filename for pass remarks"), 154 cl::value_desc("filename")); 155 156 static cl::opt<std::string> 157 RemarksPasses("pass-remarks-filter", 158 cl::desc("Only record optimization remarks from passes whose " 159 "names match the given regular expression"), 160 cl::value_desc("regex")); 161 162 static cl::opt<std::string> RemarksFormat( 163 "pass-remarks-format", 164 cl::desc("The format used for serializing remarks (default: YAML)"), 165 cl::value_desc("format"), cl::init("yaml")); 166 167 namespace { 168 static ManagedStatic<std::vector<std::string>> RunPassNames; 169 170 struct RunPassOption { 171 void operator=(const std::string &Val) const { 172 if (Val.empty()) 173 return; 174 SmallVector<StringRef, 8> PassNames; 175 StringRef(Val).split(PassNames, ',', -1, false); 176 for (auto PassName : PassNames) 177 RunPassNames->push_back(std::string(PassName)); 178 } 179 }; 180 } 181 182 static RunPassOption RunPassOpt; 183 184 static cl::opt<RunPassOption, true, cl::parser<std::string>> RunPass( 185 "run-pass", 186 cl::desc("Run compiler only for specified passes (comma separated list)"), 187 cl::value_desc("pass-name"), cl::ZeroOrMore, cl::location(RunPassOpt)); 188 189 static int compileModule(char **, LLVMContext &); 190 191 static std::unique_ptr<ToolOutputFile> GetOutputStream(const char *TargetName, 192 Triple::OSType OS, 193 const char *ProgName) { 194 // If we don't yet have an output filename, make one. 195 if (OutputFilename.empty()) { 196 if (InputFilename == "-") 197 OutputFilename = "-"; 198 else { 199 // If InputFilename ends in .bc or .ll, remove it. 200 StringRef IFN = InputFilename; 201 if (IFN.endswith(".bc") || IFN.endswith(".ll")) 202 OutputFilename = std::string(IFN.drop_back(3)); 203 else if (IFN.endswith(".mir")) 204 OutputFilename = std::string(IFN.drop_back(4)); 205 else 206 OutputFilename = std::string(IFN); 207 208 switch (codegen::getFileType()) { 209 case CGFT_AssemblyFile: 210 if (TargetName[0] == 'c') { 211 if (TargetName[1] == 0) 212 OutputFilename += ".cbe.c"; 213 else if (TargetName[1] == 'p' && TargetName[2] == 'p') 214 OutputFilename += ".cpp"; 215 else 216 OutputFilename += ".s"; 217 } else 218 OutputFilename += ".s"; 219 break; 220 case CGFT_ObjectFile: 221 if (OS == Triple::Win32) 222 OutputFilename += ".obj"; 223 else 224 OutputFilename += ".o"; 225 break; 226 case CGFT_Null: 227 OutputFilename += ".null"; 228 break; 229 } 230 } 231 } 232 233 // Decide if we need "binary" output. 234 bool Binary = false; 235 switch (codegen::getFileType()) { 236 case CGFT_AssemblyFile: 237 break; 238 case CGFT_ObjectFile: 239 case CGFT_Null: 240 Binary = true; 241 break; 242 } 243 244 // Open the file. 245 std::error_code EC; 246 sys::fs::OpenFlags OpenFlags = sys::fs::OF_None; 247 if (!Binary) 248 OpenFlags |= sys::fs::OF_Text; 249 auto FDOut = std::make_unique<ToolOutputFile>(OutputFilename, EC, OpenFlags); 250 if (EC) { 251 WithColor::error() << EC.message() << '\n'; 252 return nullptr; 253 } 254 255 return FDOut; 256 } 257 258 struct LLCDiagnosticHandler : public DiagnosticHandler { 259 bool *HasError; 260 LLCDiagnosticHandler(bool *HasErrorPtr) : HasError(HasErrorPtr) {} 261 bool handleDiagnostics(const DiagnosticInfo &DI) override { 262 if (DI.getSeverity() == DS_Error) 263 *HasError = true; 264 265 if (auto *Remark = dyn_cast<DiagnosticInfoOptimizationBase>(&DI)) 266 if (!Remark->isEnabled()) 267 return true; 268 269 DiagnosticPrinterRawOStream DP(errs()); 270 errs() << LLVMContext::getDiagnosticMessagePrefix(DI.getSeverity()) << ": "; 271 DI.print(DP); 272 errs() << "\n"; 273 return true; 274 } 275 }; 276 277 static void InlineAsmDiagHandler(const SMDiagnostic &SMD, void *Context, 278 unsigned LocCookie) { 279 bool *HasError = static_cast<bool *>(Context); 280 if (SMD.getKind() == SourceMgr::DK_Error) 281 *HasError = true; 282 283 SMD.print(nullptr, errs()); 284 285 // For testing purposes, we print the LocCookie here. 286 if (LocCookie) 287 WithColor::note() << "!srcloc = " << LocCookie << "\n"; 288 } 289 290 // main - Entry point for the llc compiler. 291 // 292 int main(int argc, char **argv) { 293 InitLLVM X(argc, argv); 294 295 // Enable debug stream buffering. 296 EnableDebugBuffering = true; 297 298 LLVMContext Context; 299 300 // Initialize targets first, so that --version shows registered targets. 301 InitializeAllTargets(); 302 InitializeAllTargetMCs(); 303 InitializeAllAsmPrinters(); 304 InitializeAllAsmParsers(); 305 306 // Initialize codegen and IR passes used by llc so that the -print-after, 307 // -print-before, and -stop-after options work. 308 PassRegistry *Registry = PassRegistry::getPassRegistry(); 309 initializeCore(*Registry); 310 initializeCodeGen(*Registry); 311 initializeLoopStrengthReducePass(*Registry); 312 initializeLowerIntrinsicsPass(*Registry); 313 initializeEntryExitInstrumenterPass(*Registry); 314 initializePostInlineEntryExitInstrumenterPass(*Registry); 315 initializeUnreachableBlockElimLegacyPassPass(*Registry); 316 initializeConstantHoistingLegacyPassPass(*Registry); 317 initializeScalarOpts(*Registry); 318 initializeVectorization(*Registry); 319 initializeScalarizeMaskedMemIntrinPass(*Registry); 320 initializeExpandReductionsPass(*Registry); 321 initializeHardwareLoopsPass(*Registry); 322 initializeTransformUtils(*Registry); 323 324 // Initialize debugging passes. 325 initializeScavengerTestPass(*Registry); 326 327 // Register the target printer for --version. 328 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 329 330 cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); 331 332 Context.setDiscardValueNames(DiscardValueNames); 333 334 // Set a diagnostic handler that doesn't exit on the first error 335 bool HasError = false; 336 Context.setDiagnosticHandler( 337 std::make_unique<LLCDiagnosticHandler>(&HasError)); 338 Context.setInlineAsmDiagnosticHandler(InlineAsmDiagHandler, &HasError); 339 340 Expected<std::unique_ptr<ToolOutputFile>> RemarksFileOrErr = 341 setupLLVMOptimizationRemarks(Context, RemarksFilename, RemarksPasses, 342 RemarksFormat, RemarksWithHotness, 343 RemarksHotnessThreshold); 344 if (Error E = RemarksFileOrErr.takeError()) { 345 WithColor::error(errs(), argv[0]) << toString(std::move(E)) << '\n'; 346 return 1; 347 } 348 std::unique_ptr<ToolOutputFile> RemarksFile = std::move(*RemarksFileOrErr); 349 350 if (InputLanguage != "" && InputLanguage != "ir" && 351 InputLanguage != "mir") { 352 WithColor::error(errs(), argv[0]) 353 << "input language must be '', 'IR' or 'MIR'\n"; 354 return 1; 355 } 356 357 // Compile the module TimeCompilations times to give better compile time 358 // metrics. 359 for (unsigned I = TimeCompilations; I; --I) 360 if (int RetVal = compileModule(argv, Context)) 361 return RetVal; 362 363 if (RemarksFile) 364 RemarksFile->keep(); 365 return 0; 366 } 367 368 static bool addPass(PassManagerBase &PM, const char *argv0, 369 StringRef PassName, TargetPassConfig &TPC) { 370 if (PassName == "none") 371 return false; 372 373 const PassRegistry *PR = PassRegistry::getPassRegistry(); 374 const PassInfo *PI = PR->getPassInfo(PassName); 375 if (!PI) { 376 WithColor::error(errs(), argv0) 377 << "run-pass " << PassName << " is not registered.\n"; 378 return true; 379 } 380 381 Pass *P; 382 if (PI->getNormalCtor()) 383 P = PI->getNormalCtor()(); 384 else { 385 WithColor::error(errs(), argv0) 386 << "cannot create pass: " << PI->getPassName() << "\n"; 387 return true; 388 } 389 std::string Banner = std::string("After ") + std::string(P->getPassName()); 390 TPC.addMachinePrePasses(); 391 PM.add(P); 392 TPC.addMachinePostPasses(Banner); 393 394 return false; 395 } 396 397 static int compileModule(char **argv, LLVMContext &Context) { 398 // Load the module to be compiled... 399 SMDiagnostic Err; 400 std::unique_ptr<Module> M; 401 std::unique_ptr<MIRParser> MIR; 402 Triple TheTriple; 403 std::string CPUStr = codegen::getCPUStr(), 404 FeaturesStr = codegen::getFeaturesStr(); 405 406 // Set attributes on functions as loaded from MIR from command line arguments. 407 auto setMIRFunctionAttributes = [&CPUStr, &FeaturesStr](Function &F) { 408 codegen::setFunctionAttributes(CPUStr, FeaturesStr, F); 409 }; 410 411 auto MAttrs = codegen::getMAttrs(); 412 bool SkipModule = codegen::getMCPU() == "help" || 413 (!MAttrs.empty() && MAttrs.front() == "help"); 414 415 CodeGenOpt::Level OLvl = CodeGenOpt::Default; 416 switch (OptLevel) { 417 default: 418 WithColor::error(errs(), argv[0]) << "invalid optimization level.\n"; 419 return 1; 420 case ' ': break; 421 case '0': OLvl = CodeGenOpt::None; break; 422 case '1': OLvl = CodeGenOpt::Less; break; 423 case '2': OLvl = CodeGenOpt::Default; break; 424 case '3': OLvl = CodeGenOpt::Aggressive; break; 425 } 426 427 TargetOptions Options = codegen::InitTargetOptionsFromCodeGenFlags(); 428 Options.DisableIntegratedAS = NoIntegratedAssembler; 429 Options.MCOptions.ShowMCEncoding = ShowMCEncoding; 430 Options.MCOptions.MCUseDwarfDirectory = EnableDwarfDirectory; 431 Options.MCOptions.AsmVerbose = AsmVerbose; 432 Options.MCOptions.PreserveAsmComments = PreserveComments; 433 Options.MCOptions.IASSearchPaths = IncludeDirs; 434 Options.MCOptions.SplitDwarfFile = SplitDwarfFile; 435 436 Optional<Reloc::Model> RM = codegen::getExplicitRelocModel(); 437 438 const Target *TheTarget = nullptr; 439 std::unique_ptr<TargetMachine> Target; 440 441 // If user just wants to list available options, skip module loading 442 if (!SkipModule) { 443 auto SetDataLayout = 444 [&](StringRef DataLayoutTargetTriple) -> Optional<std::string> { 445 // If we are supposed to override the target triple, do so now. 446 std::string IRTargetTriple = DataLayoutTargetTriple.str(); 447 if (!TargetTriple.empty()) 448 IRTargetTriple = Triple::normalize(TargetTriple); 449 TheTriple = Triple(IRTargetTriple); 450 if (TheTriple.getTriple().empty()) 451 TheTriple.setTriple(sys::getDefaultTargetTriple()); 452 453 std::string Error; 454 TheTarget = 455 TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error); 456 if (!TheTarget) { 457 WithColor::error(errs(), argv[0]) << Error; 458 exit(1); 459 } 460 461 // On AIX, setting the relocation model to anything other than PIC is 462 // considered a user error. 463 if (TheTriple.isOSAIX() && RM.hasValue() && *RM != Reloc::PIC_) { 464 WithColor::error(errs(), argv[0]) 465 << "invalid relocation model, AIX only supports PIC.\n"; 466 exit(1); 467 } 468 469 Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine( 470 TheTriple.getTriple(), CPUStr, FeaturesStr, Options, RM, 471 codegen::getExplicitCodeModel(), OLvl)); 472 assert(Target && "Could not allocate target machine!"); 473 474 return Target->createDataLayout().getStringRepresentation(); 475 }; 476 if (InputLanguage == "mir" || 477 (InputLanguage == "" && StringRef(InputFilename).endswith(".mir"))) { 478 MIR = createMIRParserFromFile(InputFilename, Err, Context, 479 setMIRFunctionAttributes); 480 if (MIR) 481 M = MIR->parseIRModule(SetDataLayout); 482 } else { 483 M = parseIRFile(InputFilename, Err, Context, SetDataLayout); 484 } 485 if (!M) { 486 Err.print(argv[0], WithColor::error(errs(), argv[0])); 487 return 1; 488 } 489 if (!TargetTriple.empty()) 490 M->setTargetTriple(Triple::normalize(TargetTriple)); 491 } else { 492 TheTriple = Triple(Triple::normalize(TargetTriple)); 493 if (TheTriple.getTriple().empty()) 494 TheTriple.setTriple(sys::getDefaultTargetTriple()); 495 496 // Get the target specific parser. 497 std::string Error; 498 TheTarget = 499 TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error); 500 if (!TheTarget) { 501 WithColor::error(errs(), argv[0]) << Error; 502 return 1; 503 } 504 505 // On AIX, setting the relocation model to anything other than PIC is 506 // considered a user error. 507 if (TheTriple.isOSAIX() && RM.hasValue() && *RM != Reloc::PIC_) { 508 WithColor::error(errs(), argv[0]) 509 << "invalid relocation model, AIX only supports PIC.\n"; 510 return 1; 511 } 512 513 Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine( 514 TheTriple.getTriple(), CPUStr, FeaturesStr, Options, RM, 515 codegen::getExplicitCodeModel(), OLvl)); 516 assert(Target && "Could not allocate target machine!"); 517 518 // If we don't have a module then just exit now. We do this down 519 // here since the CPU/Feature help is underneath the target machine 520 // creation. 521 return 0; 522 } 523 524 assert(M && "Should have exited if we didn't have a module!"); 525 if (codegen::getFloatABIForCalls() != FloatABI::Default) 526 Options.FloatABIType = codegen::getFloatABIForCalls(); 527 528 // Figure out where we are going to send the output. 529 std::unique_ptr<ToolOutputFile> Out = 530 GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]); 531 if (!Out) return 1; 532 533 std::unique_ptr<ToolOutputFile> DwoOut; 534 if (!SplitDwarfOutputFile.empty()) { 535 std::error_code EC; 536 DwoOut = std::make_unique<ToolOutputFile>(SplitDwarfOutputFile, EC, 537 sys::fs::OF_None); 538 if (EC) { 539 WithColor::error(errs(), argv[0]) << EC.message() << '\n'; 540 return 1; 541 } 542 } 543 544 // Build up all of the passes that we want to do to the module. 545 legacy::PassManager PM; 546 547 // Add an appropriate TargetLibraryInfo pass for the module's triple. 548 TargetLibraryInfoImpl TLII(Triple(M->getTargetTriple())); 549 550 // The -disable-simplify-libcalls flag actually disables all builtin optzns. 551 if (DisableSimplifyLibCalls) 552 TLII.disableAllFunctions(); 553 PM.add(new TargetLibraryInfoWrapperPass(TLII)); 554 555 // Verify module immediately to catch problems before doInitialization() is 556 // called on any passes. 557 if (!NoVerify && verifyModule(*M, &errs())) { 558 std::string Prefix = 559 (Twine(argv[0]) + Twine(": ") + Twine(InputFilename)).str(); 560 WithColor::error(errs(), Prefix) << "input module is broken!\n"; 561 return 1; 562 } 563 564 // Override function attributes based on CPUStr, FeaturesStr, and command line 565 // flags. 566 codegen::setFunctionAttributes(CPUStr, FeaturesStr, *M); 567 568 if (mc::getExplicitRelaxAll() && codegen::getFileType() != CGFT_ObjectFile) 569 WithColor::warning(errs(), argv[0]) 570 << ": warning: ignoring -mc-relax-all because filetype != obj"; 571 572 { 573 raw_pwrite_stream *OS = &Out->os(); 574 575 // Manually do the buffering rather than using buffer_ostream, 576 // so we can memcmp the contents in CompileTwice mode 577 SmallVector<char, 0> Buffer; 578 std::unique_ptr<raw_svector_ostream> BOS; 579 if ((codegen::getFileType() != CGFT_AssemblyFile && 580 !Out->os().supportsSeeking()) || 581 CompileTwice) { 582 BOS = std::make_unique<raw_svector_ostream>(Buffer); 583 OS = BOS.get(); 584 } 585 586 const char *argv0 = argv[0]; 587 LLVMTargetMachine &LLVMTM = static_cast<LLVMTargetMachine &>(*Target); 588 MachineModuleInfoWrapperPass *MMIWP = 589 new MachineModuleInfoWrapperPass(&LLVMTM); 590 591 // Construct a custom pass pipeline that starts after instruction 592 // selection. 593 if (!RunPassNames->empty()) { 594 if (!MIR) { 595 WithColor::warning(errs(), argv[0]) 596 << "run-pass is for .mir file only.\n"; 597 return 1; 598 } 599 TargetPassConfig &TPC = *LLVMTM.createPassConfig(PM); 600 if (TPC.hasLimitedCodeGenPipeline()) { 601 WithColor::warning(errs(), argv[0]) 602 << "run-pass cannot be used with " 603 << TPC.getLimitedCodeGenPipelineReason(" and ") << ".\n"; 604 return 1; 605 } 606 607 TPC.setDisableVerify(NoVerify); 608 PM.add(&TPC); 609 PM.add(MMIWP); 610 TPC.printAndVerify(""); 611 for (const std::string &RunPassName : *RunPassNames) { 612 if (addPass(PM, argv0, RunPassName, TPC)) 613 return 1; 614 } 615 TPC.setInitialized(); 616 PM.add(createPrintMIRPass(*OS)); 617 PM.add(createFreeMachineFunctionPass()); 618 } else if (Target->addPassesToEmitFile( 619 PM, *OS, DwoOut ? &DwoOut->os() : nullptr, 620 codegen::getFileType(), NoVerify, MMIWP)) { 621 WithColor::warning(errs(), argv[0]) 622 << "target does not support generation of this" 623 << " file type!\n"; 624 return 1; 625 } 626 627 const_cast<TargetLoweringObjectFile *>(LLVMTM.getObjFileLowering()) 628 ->Initialize(MMIWP->getMMI().getContext(), *Target); 629 if (MIR) { 630 assert(MMIWP && "Forgot to create MMIWP?"); 631 if (MIR->parseMachineFunctions(*M, MMIWP->getMMI())) 632 return 1; 633 } 634 635 // Before executing passes, print the final values of the LLVM options. 636 cl::PrintOptionValues(); 637 638 // If requested, run the pass manager over the same module again, 639 // to catch any bugs due to persistent state in the passes. Note that 640 // opt has the same functionality, so it may be worth abstracting this out 641 // in the future. 642 SmallVector<char, 0> CompileTwiceBuffer; 643 if (CompileTwice) { 644 std::unique_ptr<Module> M2(llvm::CloneModule(*M)); 645 PM.run(*M2); 646 CompileTwiceBuffer = Buffer; 647 Buffer.clear(); 648 } 649 650 PM.run(*M); 651 652 auto HasError = 653 ((const LLCDiagnosticHandler *)(Context.getDiagHandlerPtr()))->HasError; 654 if (*HasError) 655 return 1; 656 657 // Compare the two outputs and make sure they're the same 658 if (CompileTwice) { 659 if (Buffer.size() != CompileTwiceBuffer.size() || 660 (memcmp(Buffer.data(), CompileTwiceBuffer.data(), Buffer.size()) != 661 0)) { 662 errs() 663 << "Running the pass manager twice changed the output.\n" 664 "Writing the result of the second run to the specified output\n" 665 "To generate the one-run comparison binary, just run without\n" 666 "the compile-twice option\n"; 667 Out->os() << Buffer; 668 Out->keep(); 669 return 1; 670 } 671 } 672 673 if (BOS) { 674 Out->os() << Buffer; 675 } 676 } 677 678 // Declare success. 679 Out->keep(); 680 if (DwoOut) 681 DwoOut->keep(); 682 683 return 0; 684 } 685