1 //===-LTOBackend.cpp - LLVM Link Time Optimizer Backend -------------------===// 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 implements the "backend" phase of LTO, i.e. it performs 10 // optimization and code generation on a loaded module. It is generally used 11 // internally by the LTO class but can also be used independently, for example 12 // to implement a standalone ThinLTO backend. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "llvm/LTO/LTOBackend.h" 17 #include "llvm/Analysis/AliasAnalysis.h" 18 #include "llvm/Analysis/CGSCCPassManager.h" 19 #include "llvm/Analysis/TargetLibraryInfo.h" 20 #include "llvm/Analysis/TargetTransformInfo.h" 21 #include "llvm/Bitcode/BitcodeReader.h" 22 #include "llvm/Bitcode/BitcodeWriter.h" 23 #include "llvm/IR/LegacyPassManager.h" 24 #include "llvm/IR/PassManager.h" 25 #include "llvm/IR/RemarkStreamer.h" 26 #include "llvm/IR/Verifier.h" 27 #include "llvm/LTO/LTO.h" 28 #include "llvm/MC/SubtargetFeature.h" 29 #include "llvm/Object/ModuleSymbolTable.h" 30 #include "llvm/Passes/PassBuilder.h" 31 #include "llvm/Passes/StandardInstrumentations.h" 32 #include "llvm/Support/Error.h" 33 #include "llvm/Support/FileSystem.h" 34 #include "llvm/Support/MemoryBuffer.h" 35 #include "llvm/Support/Path.h" 36 #include "llvm/Support/Program.h" 37 #include "llvm/Support/TargetRegistry.h" 38 #include "llvm/Support/ThreadPool.h" 39 #include "llvm/Support/raw_ostream.h" 40 #include "llvm/Target/TargetMachine.h" 41 #include "llvm/Transforms/IPO.h" 42 #include "llvm/Transforms/IPO/PassManagerBuilder.h" 43 #include "llvm/Transforms/Scalar/LoopPassManager.h" 44 #include "llvm/Transforms/Utils/FunctionImportUtils.h" 45 #include "llvm/Transforms/Utils/SplitModule.h" 46 47 using namespace llvm; 48 using namespace lto; 49 50 LLVM_ATTRIBUTE_NORETURN static void reportOpenError(StringRef Path, Twine Msg) { 51 errs() << "failed to open " << Path << ": " << Msg << '\n'; 52 errs().flush(); 53 exit(1); 54 } 55 56 Error Config::addSaveTemps(std::string OutputFileName, 57 bool UseInputModulePath) { 58 ShouldDiscardValueNames = false; 59 60 std::error_code EC; 61 ResolutionFile = std::make_unique<raw_fd_ostream>( 62 OutputFileName + "resolution.txt", EC, sys::fs::OpenFlags::OF_Text); 63 if (EC) 64 return errorCodeToError(EC); 65 66 auto setHook = [&](std::string PathSuffix, ModuleHookFn &Hook) { 67 // Keep track of the hook provided by the linker, which also needs to run. 68 ModuleHookFn LinkerHook = Hook; 69 Hook = [=](unsigned Task, const Module &M) { 70 // If the linker's hook returned false, we need to pass that result 71 // through. 72 if (LinkerHook && !LinkerHook(Task, M)) 73 return false; 74 75 std::string PathPrefix; 76 // If this is the combined module (not a ThinLTO backend compile) or the 77 // user hasn't requested using the input module's path, emit to a file 78 // named from the provided OutputFileName with the Task ID appended. 79 if (M.getModuleIdentifier() == "ld-temp.o" || !UseInputModulePath) { 80 PathPrefix = OutputFileName; 81 if (Task != (unsigned)-1) 82 PathPrefix += utostr(Task) + "."; 83 } else 84 PathPrefix = M.getModuleIdentifier() + "."; 85 std::string Path = PathPrefix + PathSuffix + ".bc"; 86 std::error_code EC; 87 raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::OF_None); 88 // Because -save-temps is a debugging feature, we report the error 89 // directly and exit. 90 if (EC) 91 reportOpenError(Path, EC.message()); 92 WriteBitcodeToFile(M, OS, /*ShouldPreserveUseListOrder=*/false); 93 return true; 94 }; 95 }; 96 97 setHook("0.preopt", PreOptModuleHook); 98 setHook("1.promote", PostPromoteModuleHook); 99 setHook("2.internalize", PostInternalizeModuleHook); 100 setHook("3.import", PostImportModuleHook); 101 setHook("4.opt", PostOptModuleHook); 102 setHook("5.precodegen", PreCodeGenModuleHook); 103 104 CombinedIndexHook = [=](const ModuleSummaryIndex &Index) { 105 std::string Path = OutputFileName + "index.bc"; 106 std::error_code EC; 107 raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::OF_None); 108 // Because -save-temps is a debugging feature, we report the error 109 // directly and exit. 110 if (EC) 111 reportOpenError(Path, EC.message()); 112 WriteIndexToFile(Index, OS); 113 114 Path = OutputFileName + "index.dot"; 115 raw_fd_ostream OSDot(Path, EC, sys::fs::OpenFlags::OF_None); 116 if (EC) 117 reportOpenError(Path, EC.message()); 118 Index.exportToDot(OSDot); 119 return true; 120 }; 121 122 return Error::success(); 123 } 124 125 namespace { 126 127 std::unique_ptr<TargetMachine> 128 createTargetMachine(Config &Conf, const Target *TheTarget, Module &M) { 129 StringRef TheTriple = M.getTargetTriple(); 130 SubtargetFeatures Features; 131 Features.getDefaultSubtargetFeatures(Triple(TheTriple)); 132 for (const std::string &A : Conf.MAttrs) 133 Features.AddFeature(A); 134 135 Reloc::Model RelocModel; 136 if (Conf.RelocModel) 137 RelocModel = *Conf.RelocModel; 138 else 139 RelocModel = 140 M.getPICLevel() == PICLevel::NotPIC ? Reloc::Static : Reloc::PIC_; 141 142 Optional<CodeModel::Model> CodeModel; 143 if (Conf.CodeModel) 144 CodeModel = *Conf.CodeModel; 145 else 146 CodeModel = M.getCodeModel(); 147 148 return std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine( 149 TheTriple, Conf.CPU, Features.getString(), Conf.Options, RelocModel, 150 CodeModel, Conf.CGOptLevel)); 151 } 152 153 static void runNewPMPasses(Config &Conf, Module &Mod, TargetMachine *TM, 154 unsigned OptLevel, bool IsThinLTO, 155 ModuleSummaryIndex *ExportSummary, 156 const ModuleSummaryIndex *ImportSummary) { 157 Optional<PGOOptions> PGOOpt; 158 if (!Conf.SampleProfile.empty()) 159 PGOOpt = PGOOptions(Conf.SampleProfile, "", Conf.ProfileRemapping, 160 PGOOptions::SampleUse, PGOOptions::NoCSAction, true); 161 else if (Conf.RunCSIRInstr) { 162 PGOOpt = PGOOptions("", Conf.CSIRProfile, Conf.ProfileRemapping, 163 PGOOptions::IRUse, PGOOptions::CSIRInstr); 164 } else if (!Conf.CSIRProfile.empty()) { 165 PGOOpt = PGOOptions(Conf.CSIRProfile, "", Conf.ProfileRemapping, 166 PGOOptions::IRUse, PGOOptions::CSIRUse); 167 } 168 169 PassInstrumentationCallbacks PIC; 170 StandardInstrumentations SI; 171 SI.registerCallbacks(PIC); 172 PassBuilder PB(TM, PipelineTuningOptions(),PGOOpt, &PIC); 173 AAManager AA; 174 175 // Parse a custom AA pipeline if asked to. 176 if (auto Err = PB.parseAAPipeline(AA, "default")) 177 report_fatal_error("Error parsing default AA pipeline"); 178 179 LoopAnalysisManager LAM(Conf.DebugPassManager); 180 FunctionAnalysisManager FAM(Conf.DebugPassManager); 181 CGSCCAnalysisManager CGAM(Conf.DebugPassManager); 182 ModuleAnalysisManager MAM(Conf.DebugPassManager); 183 184 // Register the AA manager first so that our version is the one used. 185 FAM.registerPass([&] { return std::move(AA); }); 186 187 // Register all the basic analyses with the managers. 188 PB.registerModuleAnalyses(MAM); 189 PB.registerCGSCCAnalyses(CGAM); 190 PB.registerFunctionAnalyses(FAM); 191 PB.registerLoopAnalyses(LAM); 192 PB.crossRegisterProxies(LAM, FAM, CGAM, MAM); 193 194 ModulePassManager MPM(Conf.DebugPassManager); 195 // FIXME (davide): verify the input. 196 197 PassBuilder::OptimizationLevel OL; 198 199 switch (OptLevel) { 200 default: 201 llvm_unreachable("Invalid optimization level"); 202 case 0: 203 OL = PassBuilder::O0; 204 break; 205 case 1: 206 OL = PassBuilder::O1; 207 break; 208 case 2: 209 OL = PassBuilder::O2; 210 break; 211 case 3: 212 OL = PassBuilder::O3; 213 break; 214 } 215 216 if (IsThinLTO) 217 MPM = PB.buildThinLTODefaultPipeline(OL, Conf.DebugPassManager, 218 ImportSummary); 219 else 220 MPM = PB.buildLTODefaultPipeline(OL, Conf.DebugPassManager, ExportSummary); 221 MPM.run(Mod, MAM); 222 223 // FIXME (davide): verify the output. 224 } 225 226 static void runNewPMCustomPasses(Module &Mod, TargetMachine *TM, 227 std::string PipelineDesc, 228 std::string AAPipelineDesc, 229 bool DisableVerify) { 230 PassBuilder PB(TM); 231 AAManager AA; 232 233 // Parse a custom AA pipeline if asked to. 234 if (!AAPipelineDesc.empty()) 235 if (auto Err = PB.parseAAPipeline(AA, AAPipelineDesc)) 236 report_fatal_error("unable to parse AA pipeline description '" + 237 AAPipelineDesc + "': " + toString(std::move(Err))); 238 239 LoopAnalysisManager LAM; 240 FunctionAnalysisManager FAM; 241 CGSCCAnalysisManager CGAM; 242 ModuleAnalysisManager MAM; 243 244 // Register the AA manager first so that our version is the one used. 245 FAM.registerPass([&] { return std::move(AA); }); 246 247 // Register all the basic analyses with the managers. 248 PB.registerModuleAnalyses(MAM); 249 PB.registerCGSCCAnalyses(CGAM); 250 PB.registerFunctionAnalyses(FAM); 251 PB.registerLoopAnalyses(LAM); 252 PB.crossRegisterProxies(LAM, FAM, CGAM, MAM); 253 254 ModulePassManager MPM; 255 256 // Always verify the input. 257 MPM.addPass(VerifierPass()); 258 259 // Now, add all the passes we've been requested to. 260 if (auto Err = PB.parsePassPipeline(MPM, PipelineDesc)) 261 report_fatal_error("unable to parse pass pipeline description '" + 262 PipelineDesc + "': " + toString(std::move(Err))); 263 264 if (!DisableVerify) 265 MPM.addPass(VerifierPass()); 266 MPM.run(Mod, MAM); 267 } 268 269 static void runOldPMPasses(Config &Conf, Module &Mod, TargetMachine *TM, 270 bool IsThinLTO, ModuleSummaryIndex *ExportSummary, 271 const ModuleSummaryIndex *ImportSummary) { 272 legacy::PassManager passes; 273 passes.add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis())); 274 275 PassManagerBuilder PMB; 276 PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM->getTargetTriple())); 277 PMB.Inliner = createFunctionInliningPass(); 278 PMB.ExportSummary = ExportSummary; 279 PMB.ImportSummary = ImportSummary; 280 // Unconditionally verify input since it is not verified before this 281 // point and has unknown origin. 282 PMB.VerifyInput = true; 283 PMB.VerifyOutput = !Conf.DisableVerify; 284 PMB.LoopVectorize = true; 285 PMB.SLPVectorize = true; 286 PMB.OptLevel = Conf.OptLevel; 287 PMB.PGOSampleUse = Conf.SampleProfile; 288 PMB.EnablePGOCSInstrGen = Conf.RunCSIRInstr; 289 if (!Conf.RunCSIRInstr && !Conf.CSIRProfile.empty()) { 290 PMB.EnablePGOCSInstrUse = true; 291 PMB.PGOInstrUse = Conf.CSIRProfile; 292 } 293 if (IsThinLTO) 294 PMB.populateThinLTOPassManager(passes); 295 else 296 PMB.populateLTOPassManager(passes); 297 passes.run(Mod); 298 } 299 300 bool opt(Config &Conf, TargetMachine *TM, unsigned Task, Module &Mod, 301 bool IsThinLTO, ModuleSummaryIndex *ExportSummary, 302 const ModuleSummaryIndex *ImportSummary) { 303 // FIXME: Plumb the combined index into the new pass manager. 304 if (!Conf.OptPipeline.empty()) 305 runNewPMCustomPasses(Mod, TM, Conf.OptPipeline, Conf.AAPipeline, 306 Conf.DisableVerify); 307 else if (Conf.UseNewPM) 308 runNewPMPasses(Conf, Mod, TM, Conf.OptLevel, IsThinLTO, ExportSummary, 309 ImportSummary); 310 else 311 runOldPMPasses(Conf, Mod, TM, IsThinLTO, ExportSummary, ImportSummary); 312 return !Conf.PostOptModuleHook || Conf.PostOptModuleHook(Task, Mod); 313 } 314 315 void codegen(Config &Conf, TargetMachine *TM, AddStreamFn AddStream, 316 unsigned Task, Module &Mod) { 317 if (Conf.PreCodeGenModuleHook && !Conf.PreCodeGenModuleHook(Task, Mod)) 318 return; 319 320 std::unique_ptr<ToolOutputFile> DwoOut; 321 SmallString<1024> DwoFile(Conf.SplitDwarfOutput); 322 if (!Conf.DwoDir.empty()) { 323 std::error_code EC; 324 if (auto EC = llvm::sys::fs::create_directories(Conf.DwoDir)) 325 report_fatal_error("Failed to create directory " + Conf.DwoDir + ": " + 326 EC.message()); 327 328 DwoFile = Conf.DwoDir; 329 sys::path::append(DwoFile, std::to_string(Task) + ".dwo"); 330 TM->Options.MCOptions.SplitDwarfFile = DwoFile.str().str(); 331 } else 332 TM->Options.MCOptions.SplitDwarfFile = Conf.SplitDwarfFile; 333 334 if (!DwoFile.empty()) { 335 std::error_code EC; 336 DwoOut = std::make_unique<ToolOutputFile>(DwoFile, EC, sys::fs::OF_None); 337 if (EC) 338 report_fatal_error("Failed to open " + DwoFile + ": " + EC.message()); 339 } 340 341 auto Stream = AddStream(Task); 342 legacy::PassManager CodeGenPasses; 343 if (TM->addPassesToEmitFile(CodeGenPasses, *Stream->OS, 344 DwoOut ? &DwoOut->os() : nullptr, 345 Conf.CGFileType)) 346 report_fatal_error("Failed to setup codegen"); 347 CodeGenPasses.run(Mod); 348 349 if (DwoOut) 350 DwoOut->keep(); 351 } 352 353 void splitCodeGen(Config &C, TargetMachine *TM, AddStreamFn AddStream, 354 unsigned ParallelCodeGenParallelismLevel, 355 std::unique_ptr<Module> Mod) { 356 ThreadPool CodegenThreadPool(ParallelCodeGenParallelismLevel); 357 unsigned ThreadCount = 0; 358 const Target *T = &TM->getTarget(); 359 360 SplitModule( 361 std::move(Mod), ParallelCodeGenParallelismLevel, 362 [&](std::unique_ptr<Module> MPart) { 363 // We want to clone the module in a new context to multi-thread the 364 // codegen. We do it by serializing partition modules to bitcode 365 // (while still on the main thread, in order to avoid data races) and 366 // spinning up new threads which deserialize the partitions into 367 // separate contexts. 368 // FIXME: Provide a more direct way to do this in LLVM. 369 SmallString<0> BC; 370 raw_svector_ostream BCOS(BC); 371 WriteBitcodeToFile(*MPart, BCOS); 372 373 // Enqueue the task 374 CodegenThreadPool.async( 375 [&](const SmallString<0> &BC, unsigned ThreadId) { 376 LTOLLVMContext Ctx(C); 377 Expected<std::unique_ptr<Module>> MOrErr = parseBitcodeFile( 378 MemoryBufferRef(StringRef(BC.data(), BC.size()), "ld-temp.o"), 379 Ctx); 380 if (!MOrErr) 381 report_fatal_error("Failed to read bitcode"); 382 std::unique_ptr<Module> MPartInCtx = std::move(MOrErr.get()); 383 384 std::unique_ptr<TargetMachine> TM = 385 createTargetMachine(C, T, *MPartInCtx); 386 387 codegen(C, TM.get(), AddStream, ThreadId, *MPartInCtx); 388 }, 389 // Pass BC using std::move to ensure that it get moved rather than 390 // copied into the thread's context. 391 std::move(BC), ThreadCount++); 392 }, 393 false); 394 395 // Because the inner lambda (which runs in a worker thread) captures our local 396 // variables, we need to wait for the worker threads to terminate before we 397 // can leave the function scope. 398 CodegenThreadPool.wait(); 399 } 400 401 Expected<const Target *> initAndLookupTarget(Config &C, Module &Mod) { 402 if (!C.OverrideTriple.empty()) 403 Mod.setTargetTriple(C.OverrideTriple); 404 else if (Mod.getTargetTriple().empty()) 405 Mod.setTargetTriple(C.DefaultTriple); 406 407 std::string Msg; 408 const Target *T = TargetRegistry::lookupTarget(Mod.getTargetTriple(), Msg); 409 if (!T) 410 return make_error<StringError>(Msg, inconvertibleErrorCode()); 411 return T; 412 } 413 414 } 415 416 static Error 417 finalizeOptimizationRemarks(std::unique_ptr<ToolOutputFile> DiagOutputFile) { 418 // Make sure we flush the diagnostic remarks file in case the linker doesn't 419 // call the global destructors before exiting. 420 if (!DiagOutputFile) 421 return Error::success(); 422 DiagOutputFile->keep(); 423 DiagOutputFile->os().flush(); 424 return Error::success(); 425 } 426 427 Error lto::backend(Config &C, AddStreamFn AddStream, 428 unsigned ParallelCodeGenParallelismLevel, 429 std::unique_ptr<Module> Mod, 430 ModuleSummaryIndex &CombinedIndex) { 431 Expected<const Target *> TOrErr = initAndLookupTarget(C, *Mod); 432 if (!TOrErr) 433 return TOrErr.takeError(); 434 435 std::unique_ptr<TargetMachine> TM = createTargetMachine(C, *TOrErr, *Mod); 436 437 // Setup optimization remarks. 438 auto DiagFileOrErr = lto::setupOptimizationRemarks( 439 Mod->getContext(), C.RemarksFilename, C.RemarksPasses, C.RemarksFormat, 440 C.RemarksWithHotness); 441 if (!DiagFileOrErr) 442 return DiagFileOrErr.takeError(); 443 auto DiagnosticOutputFile = std::move(*DiagFileOrErr); 444 445 if (!C.CodeGenOnly) { 446 if (!opt(C, TM.get(), 0, *Mod, /*IsThinLTO=*/false, 447 /*ExportSummary=*/&CombinedIndex, /*ImportSummary=*/nullptr)) 448 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 449 } 450 451 if (ParallelCodeGenParallelismLevel == 1) { 452 codegen(C, TM.get(), AddStream, 0, *Mod); 453 } else { 454 splitCodeGen(C, TM.get(), AddStream, ParallelCodeGenParallelismLevel, 455 std::move(Mod)); 456 } 457 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 458 } 459 460 static void dropDeadSymbols(Module &Mod, const GVSummaryMapTy &DefinedGlobals, 461 const ModuleSummaryIndex &Index) { 462 std::vector<GlobalValue*> DeadGVs; 463 for (auto &GV : Mod.global_values()) 464 if (GlobalValueSummary *GVS = DefinedGlobals.lookup(GV.getGUID())) 465 if (!Index.isGlobalValueLive(GVS)) { 466 DeadGVs.push_back(&GV); 467 convertToDeclaration(GV); 468 } 469 470 // Now that all dead bodies have been dropped, delete the actual objects 471 // themselves when possible. 472 for (GlobalValue *GV : DeadGVs) { 473 GV->removeDeadConstantUsers(); 474 // Might reference something defined in native object (i.e. dropped a 475 // non-prevailing IR def, but we need to keep the declaration). 476 if (GV->use_empty()) 477 GV->eraseFromParent(); 478 } 479 } 480 481 Error lto::thinBackend(Config &Conf, unsigned Task, AddStreamFn AddStream, 482 Module &Mod, const ModuleSummaryIndex &CombinedIndex, 483 const FunctionImporter::ImportMapTy &ImportList, 484 const GVSummaryMapTy &DefinedGlobals, 485 MapVector<StringRef, BitcodeModule> &ModuleMap) { 486 Expected<const Target *> TOrErr = initAndLookupTarget(Conf, Mod); 487 if (!TOrErr) 488 return TOrErr.takeError(); 489 490 std::unique_ptr<TargetMachine> TM = createTargetMachine(Conf, *TOrErr, Mod); 491 492 // Setup optimization remarks. 493 auto DiagFileOrErr = lto::setupOptimizationRemarks( 494 Mod.getContext(), Conf.RemarksFilename, Conf.RemarksPasses, 495 Conf.RemarksFormat, Conf.RemarksWithHotness, Task); 496 if (!DiagFileOrErr) 497 return DiagFileOrErr.takeError(); 498 auto DiagnosticOutputFile = std::move(*DiagFileOrErr); 499 500 if (Conf.CodeGenOnly) { 501 codegen(Conf, TM.get(), AddStream, Task, Mod); 502 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 503 } 504 505 if (Conf.PreOptModuleHook && !Conf.PreOptModuleHook(Task, Mod)) 506 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 507 508 renameModuleForThinLTO(Mod, CombinedIndex); 509 510 dropDeadSymbols(Mod, DefinedGlobals, CombinedIndex); 511 512 thinLTOResolvePrevailingInModule(Mod, DefinedGlobals); 513 514 if (Conf.PostPromoteModuleHook && !Conf.PostPromoteModuleHook(Task, Mod)) 515 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 516 517 if (!DefinedGlobals.empty()) 518 thinLTOInternalizeModule(Mod, DefinedGlobals); 519 520 if (Conf.PostInternalizeModuleHook && 521 !Conf.PostInternalizeModuleHook(Task, Mod)) 522 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 523 524 auto ModuleLoader = [&](StringRef Identifier) { 525 assert(Mod.getContext().isODRUniquingDebugTypes() && 526 "ODR Type uniquing should be enabled on the context"); 527 auto I = ModuleMap.find(Identifier); 528 assert(I != ModuleMap.end()); 529 return I->second.getLazyModule(Mod.getContext(), 530 /*ShouldLazyLoadMetadata=*/true, 531 /*IsImporting*/ true); 532 }; 533 534 FunctionImporter Importer(CombinedIndex, ModuleLoader); 535 if (Error Err = Importer.importFunctions(Mod, ImportList).takeError()) 536 return Err; 537 538 if (Conf.PostImportModuleHook && !Conf.PostImportModuleHook(Task, Mod)) 539 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 540 541 if (!opt(Conf, TM.get(), Task, Mod, /*IsThinLTO=*/true, 542 /*ExportSummary=*/nullptr, /*ImportSummary=*/&CombinedIndex)) 543 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 544 545 codegen(Conf, TM.get(), AddStream, Task, Mod); 546 return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile)); 547 } 548