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Teresa Johnson9ba95f92016-08-11 14:58:12 +00001//===-LTOBackend.cpp - LLVM Link Time Optimizer Backend -------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the "backend" phase of LTO, i.e. it performs
11// optimization and code generation on a loaded module. It is generally used
12// internally by the LTO class but can also be used independently, for example
13// to implement a standalone ThinLTO backend.
14//
15//===----------------------------------------------------------------------===//
16
17#include "llvm/LTO/LTOBackend.h"
Davide Italianoec9612d2016-09-07 17:46:16 +000018#include "llvm/Analysis/AliasAnalysis.h"
19#include "llvm/Analysis/CGSCCPassManager.h"
Teresa Johnson9ba95f92016-08-11 14:58:12 +000020#include "llvm/Analysis/TargetLibraryInfo.h"
21#include "llvm/Analysis/TargetTransformInfo.h"
Teresa Johnsonad176792016-11-11 05:34:58 +000022#include "llvm/Bitcode/BitcodeReader.h"
23#include "llvm/Bitcode/BitcodeWriter.h"
Teresa Johnson9ba95f92016-08-11 14:58:12 +000024#include "llvm/IR/LegacyPassManager.h"
Davide Italianoec9612d2016-09-07 17:46:16 +000025#include "llvm/IR/PassManager.h"
26#include "llvm/IR/Verifier.h"
Mehdi Amini970800e2016-08-17 06:23:09 +000027#include "llvm/LTO/LTO.h"
Davide Italianodc8e07b2016-09-16 16:05:25 +000028#include "llvm/LTO/legacy/UpdateCompilerUsed.h"
Teresa Johnson9ba95f92016-08-11 14:58:12 +000029#include "llvm/MC/SubtargetFeature.h"
Davide Italianoec9612d2016-09-07 17:46:16 +000030#include "llvm/Passes/PassBuilder.h"
Teresa Johnson9ba95f92016-08-11 14:58:12 +000031#include "llvm/Support/Error.h"
32#include "llvm/Support/FileSystem.h"
33#include "llvm/Support/TargetRegistry.h"
34#include "llvm/Support/ThreadPool.h"
35#include "llvm/Target/TargetMachine.h"
36#include "llvm/Transforms/IPO.h"
37#include "llvm/Transforms/IPO/PassManagerBuilder.h"
Chandler Carruth3bab7e12017-01-11 09:43:56 +000038#include "llvm/Transforms/Scalar/LoopPassManager.h"
Teresa Johnson9ba95f92016-08-11 14:58:12 +000039#include "llvm/Transforms/Utils/FunctionImportUtils.h"
40#include "llvm/Transforms/Utils/SplitModule.h"
41
42using namespace llvm;
43using namespace lto;
44
Benjamin Kramer4c2582a2016-10-18 19:39:31 +000045LLVM_ATTRIBUTE_NORETURN static void reportOpenError(StringRef Path, Twine Msg) {
Davide Italianoa416d112016-09-17 22:32:42 +000046 errs() << "failed to open " << Path << ": " << Msg << '\n';
47 errs().flush();
48 exit(1);
49}
50
Teresa Johnson9ba95f92016-08-11 14:58:12 +000051Error Config::addSaveTemps(std::string OutputFileName,
52 bool UseInputModulePath) {
53 ShouldDiscardValueNames = false;
54
55 std::error_code EC;
56 ResolutionFile = llvm::make_unique<raw_fd_ostream>(
Mehdi Aminieccffad2016-08-18 00:12:33 +000057 OutputFileName + "resolution.txt", EC, sys::fs::OpenFlags::F_Text);
Teresa Johnson9ba95f92016-08-11 14:58:12 +000058 if (EC)
59 return errorCodeToError(EC);
60
61 auto setHook = [&](std::string PathSuffix, ModuleHookFn &Hook) {
62 // Keep track of the hook provided by the linker, which also needs to run.
63 ModuleHookFn LinkerHook = Hook;
Mehdi Aminif8c2f082016-08-22 16:17:40 +000064 Hook = [=](unsigned Task, const Module &M) {
Teresa Johnson9ba95f92016-08-11 14:58:12 +000065 // If the linker's hook returned false, we need to pass that result
66 // through.
67 if (LinkerHook && !LinkerHook(Task, M))
68 return false;
69
70 std::string PathPrefix;
71 // If this is the combined module (not a ThinLTO backend compile) or the
72 // user hasn't requested using the input module's path, emit to a file
73 // named from the provided OutputFileName with the Task ID appended.
74 if (M.getModuleIdentifier() == "ld-temp.o" || !UseInputModulePath) {
Mehdi Aminieccffad2016-08-18 00:12:33 +000075 PathPrefix = OutputFileName + utostr(Task);
Teresa Johnson9ba95f92016-08-11 14:58:12 +000076 } else
77 PathPrefix = M.getModuleIdentifier();
78 std::string Path = PathPrefix + "." + PathSuffix + ".bc";
79 std::error_code EC;
80 raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::F_None);
Davide Italianoa416d112016-09-17 22:32:42 +000081 // Because -save-temps is a debugging feature, we report the error
82 // directly and exit.
83 if (EC)
84 reportOpenError(Path, EC.message());
Teresa Johnson9ba95f92016-08-11 14:58:12 +000085 WriteBitcodeToFile(&M, OS, /*ShouldPreserveUseListOrder=*/false);
86 return true;
87 };
88 };
89
90 setHook("0.preopt", PreOptModuleHook);
91 setHook("1.promote", PostPromoteModuleHook);
92 setHook("2.internalize", PostInternalizeModuleHook);
93 setHook("3.import", PostImportModuleHook);
94 setHook("4.opt", PostOptModuleHook);
95 setHook("5.precodegen", PreCodeGenModuleHook);
96
97 CombinedIndexHook = [=](const ModuleSummaryIndex &Index) {
Mehdi Aminieccffad2016-08-18 00:12:33 +000098 std::string Path = OutputFileName + "index.bc";
Teresa Johnson9ba95f92016-08-11 14:58:12 +000099 std::error_code EC;
100 raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::F_None);
Davide Italianoa416d112016-09-17 22:32:42 +0000101 // Because -save-temps is a debugging feature, we report the error
102 // directly and exit.
103 if (EC)
104 reportOpenError(Path, EC.message());
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000105 WriteIndexToFile(Index, OS);
106 return true;
107 };
108
Mehdi Amini41af4302016-11-11 04:28:40 +0000109 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000110}
111
112namespace {
113
114std::unique_ptr<TargetMachine>
Davide Italiano24c29b12016-09-07 01:08:31 +0000115createTargetMachine(Config &Conf, StringRef TheTriple,
116 const Target *TheTarget) {
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000117 SubtargetFeatures Features;
118 Features.getDefaultSubtargetFeatures(Triple(TheTriple));
Davide Italiano24c29b12016-09-07 01:08:31 +0000119 for (const std::string &A : Conf.MAttrs)
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000120 Features.AddFeature(A);
121
122 return std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
Davide Italiano24c29b12016-09-07 01:08:31 +0000123 TheTriple, Conf.CPU, Features.getString(), Conf.Options, Conf.RelocModel,
124 Conf.CodeModel, Conf.CGOptLevel));
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000125}
126
Davide Italianoec9612d2016-09-07 17:46:16 +0000127static void runNewPMCustomPasses(Module &Mod, TargetMachine *TM,
128 std::string PipelineDesc,
Davide Italiano14e9e8a2016-09-16 21:03:21 +0000129 std::string AAPipelineDesc,
Davide Italianoec9612d2016-09-07 17:46:16 +0000130 bool DisableVerify) {
131 PassBuilder PB(TM);
132 AAManager AA;
Davide Italiano14e9e8a2016-09-16 21:03:21 +0000133
134 // Parse a custom AA pipeline if asked to.
135 if (!AAPipelineDesc.empty())
136 if (!PB.parseAAPipeline(AA, AAPipelineDesc))
137 report_fatal_error("unable to parse AA pipeline description: " +
138 AAPipelineDesc);
139
Davide Italianoec9612d2016-09-07 17:46:16 +0000140 LoopAnalysisManager LAM;
141 FunctionAnalysisManager FAM;
142 CGSCCAnalysisManager CGAM;
143 ModuleAnalysisManager MAM;
144
145 // Register the AA manager first so that our version is the one used.
146 FAM.registerPass([&] { return std::move(AA); });
147
148 // Register all the basic analyses with the managers.
149 PB.registerModuleAnalyses(MAM);
150 PB.registerCGSCCAnalyses(CGAM);
151 PB.registerFunctionAnalyses(FAM);
152 PB.registerLoopAnalyses(LAM);
153 PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
154
155 ModulePassManager MPM;
156
157 // Always verify the input.
158 MPM.addPass(VerifierPass());
159
160 // Now, add all the passes we've been requested to.
161 if (!PB.parsePassPipeline(MPM, PipelineDesc))
162 report_fatal_error("unable to parse pass pipeline description: " +
163 PipelineDesc);
164
165 if (!DisableVerify)
166 MPM.addPass(VerifierPass());
167 MPM.run(Mod, MAM);
168}
169
Davide Italiano24c29b12016-09-07 01:08:31 +0000170static void runOldPMPasses(Config &Conf, Module &Mod, TargetMachine *TM,
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000171 bool IsThinLTO, ModuleSummaryIndex &CombinedIndex) {
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000172 legacy::PassManager passes;
173 passes.add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis()));
174
175 PassManagerBuilder PMB;
176 PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM->getTargetTriple()));
177 PMB.Inliner = createFunctionInliningPass();
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000178 PMB.Summary = &CombinedIndex;
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000179 // Unconditionally verify input since it is not verified before this
180 // point and has unknown origin.
181 PMB.VerifyInput = true;
Davide Italiano24c29b12016-09-07 01:08:31 +0000182 PMB.VerifyOutput = !Conf.DisableVerify;
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000183 PMB.LoopVectorize = true;
184 PMB.SLPVectorize = true;
Davide Italiano24c29b12016-09-07 01:08:31 +0000185 PMB.OptLevel = Conf.OptLevel;
Dehao Chen27978002016-12-16 16:48:46 +0000186 PMB.PGOSampleUse = Conf.SampleProfile;
Davide Italiano8812f282016-11-24 00:23:09 +0000187 if (IsThinLTO)
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000188 PMB.populateThinLTOPassManager(passes);
189 else
190 PMB.populateLTOPassManager(passes);
Davide Italiano24c29b12016-09-07 01:08:31 +0000191 passes.run(Mod);
Davide Italiano1e9d3d32016-08-31 17:02:44 +0000192}
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000193
Davide Italiano24c29b12016-09-07 01:08:31 +0000194bool opt(Config &Conf, TargetMachine *TM, unsigned Task, Module &Mod,
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000195 bool IsThinLTO, ModuleSummaryIndex &CombinedIndex) {
Davide Italianoec9612d2016-09-07 17:46:16 +0000196 if (Conf.OptPipeline.empty())
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000197 runOldPMPasses(Conf, Mod, TM, IsThinLTO, CombinedIndex);
Davide Italianoec9612d2016-09-07 17:46:16 +0000198 else
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000199 // FIXME: Plumb the combined index into the new pass manager.
Davide Italiano14e9e8a2016-09-16 21:03:21 +0000200 runNewPMCustomPasses(Mod, TM, Conf.OptPipeline, Conf.AAPipeline,
201 Conf.DisableVerify);
Davide Italiano24c29b12016-09-07 01:08:31 +0000202 return !Conf.PostOptModuleHook || Conf.PostOptModuleHook(Task, Mod);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000203}
204
Peter Collingbourne80186a52016-09-23 21:33:43 +0000205void codegen(Config &Conf, TargetMachine *TM, AddStreamFn AddStream,
Davide Italiano24c29b12016-09-07 01:08:31 +0000206 unsigned Task, Module &Mod) {
207 if (Conf.PreCodeGenModuleHook && !Conf.PreCodeGenModuleHook(Task, Mod))
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000208 return;
209
Peter Collingbourne80186a52016-09-23 21:33:43 +0000210 auto Stream = AddStream(Task);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000211 legacy::PassManager CodeGenPasses;
Peter Collingbourne80186a52016-09-23 21:33:43 +0000212 if (TM->addPassesToEmitFile(CodeGenPasses, *Stream->OS,
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000213 TargetMachine::CGFT_ObjectFile))
214 report_fatal_error("Failed to setup codegen");
Davide Italiano24c29b12016-09-07 01:08:31 +0000215 CodeGenPasses.run(Mod);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000216}
217
Peter Collingbourne80186a52016-09-23 21:33:43 +0000218void splitCodeGen(Config &C, TargetMachine *TM, AddStreamFn AddStream,
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000219 unsigned ParallelCodeGenParallelismLevel,
Davide Italiano24c29b12016-09-07 01:08:31 +0000220 std::unique_ptr<Module> Mod) {
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000221 ThreadPool CodegenThreadPool(ParallelCodeGenParallelismLevel);
222 unsigned ThreadCount = 0;
223 const Target *T = &TM->getTarget();
224
225 SplitModule(
Davide Italiano24c29b12016-09-07 01:08:31 +0000226 std::move(Mod), ParallelCodeGenParallelismLevel,
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000227 [&](std::unique_ptr<Module> MPart) {
228 // We want to clone the module in a new context to multi-thread the
229 // codegen. We do it by serializing partition modules to bitcode
230 // (while still on the main thread, in order to avoid data races) and
231 // spinning up new threads which deserialize the partitions into
232 // separate contexts.
233 // FIXME: Provide a more direct way to do this in LLVM.
234 SmallString<0> BC;
235 raw_svector_ostream BCOS(BC);
236 WriteBitcodeToFile(MPart.get(), BCOS);
237
238 // Enqueue the task
239 CodegenThreadPool.async(
240 [&](const SmallString<0> &BC, unsigned ThreadId) {
241 LTOLLVMContext Ctx(C);
Peter Collingbourned9445c42016-11-13 07:00:17 +0000242 Expected<std::unique_ptr<Module>> MOrErr = parseBitcodeFile(
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000243 MemoryBufferRef(StringRef(BC.data(), BC.size()), "ld-temp.o"),
244 Ctx);
245 if (!MOrErr)
246 report_fatal_error("Failed to read bitcode");
247 std::unique_ptr<Module> MPartInCtx = std::move(MOrErr.get());
248
249 std::unique_ptr<TargetMachine> TM =
250 createTargetMachine(C, MPartInCtx->getTargetTriple(), T);
Mehdi Aminiadc0e262016-08-23 21:30:12 +0000251
Peter Collingbourne80186a52016-09-23 21:33:43 +0000252 codegen(C, TM.get(), AddStream, ThreadId, *MPartInCtx);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000253 },
254 // Pass BC using std::move to ensure that it get moved rather than
255 // copied into the thread's context.
256 std::move(BC), ThreadCount++);
257 },
258 false);
Peter Collingbournef75609e2016-09-29 03:29:28 +0000259
260 // Because the inner lambda (which runs in a worker thread) captures our local
261 // variables, we need to wait for the worker threads to terminate before we
262 // can leave the function scope.
Peter Collingbourne0d5636e2016-09-29 01:28:36 +0000263 CodegenThreadPool.wait();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000264}
265
Davide Italiano24c29b12016-09-07 01:08:31 +0000266Expected<const Target *> initAndLookupTarget(Config &C, Module &Mod) {
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000267 if (!C.OverrideTriple.empty())
Davide Italiano24c29b12016-09-07 01:08:31 +0000268 Mod.setTargetTriple(C.OverrideTriple);
269 else if (Mod.getTargetTriple().empty())
270 Mod.setTargetTriple(C.DefaultTriple);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000271
272 std::string Msg;
Davide Italiano24c29b12016-09-07 01:08:31 +0000273 const Target *T = TargetRegistry::lookupTarget(Mod.getTargetTriple(), Msg);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000274 if (!T)
275 return make_error<StringError>(Msg, inconvertibleErrorCode());
276 return T;
277}
278
279}
280
Davide Italianodc8e07b2016-09-16 16:05:25 +0000281static void handleAsmUndefinedRefs(Module &Mod, TargetMachine &TM) {
282 // Collect the list of undefined symbols used in asm and update
283 // llvm.compiler.used to prevent optimization to drop these from the output.
284 StringSet<> AsmUndefinedRefs;
Peter Collingbourne863cbfb2016-12-01 06:51:47 +0000285 ModuleSymbolTable::CollectAsmSymbols(
Davide Italianodc8e07b2016-09-16 16:05:25 +0000286 Triple(Mod.getTargetTriple()), Mod.getModuleInlineAsm(),
287 [&AsmUndefinedRefs](StringRef Name, object::BasicSymbolRef::Flags Flags) {
288 if (Flags & object::BasicSymbolRef::SF_Undefined)
289 AsmUndefinedRefs.insert(Name);
290 });
291 updateCompilerUsed(Mod, TM, AsmUndefinedRefs);
292}
293
Peter Collingbourne80186a52016-09-23 21:33:43 +0000294Error lto::backend(Config &C, AddStreamFn AddStream,
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000295 unsigned ParallelCodeGenParallelismLevel,
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000296 std::unique_ptr<Module> Mod,
297 ModuleSummaryIndex &CombinedIndex) {
Davide Italiano24c29b12016-09-07 01:08:31 +0000298 Expected<const Target *> TOrErr = initAndLookupTarget(C, *Mod);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000299 if (!TOrErr)
300 return TOrErr.takeError();
301
302 std::unique_ptr<TargetMachine> TM =
Davide Italiano24c29b12016-09-07 01:08:31 +0000303 createTargetMachine(C, Mod->getTargetTriple(), *TOrErr);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000304
Davide Italianodc8e07b2016-09-16 16:05:25 +0000305 handleAsmUndefinedRefs(*Mod, *TM);
306
Mehdi Aminid310b472016-08-22 06:25:41 +0000307 if (!C.CodeGenOnly)
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000308 if (!opt(C, TM.get(), 0, *Mod, /*IsThinLTO=*/false, CombinedIndex))
Mehdi Amini41af4302016-11-11 04:28:40 +0000309 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000310
Mehdi Aminiadc0e262016-08-23 21:30:12 +0000311 if (ParallelCodeGenParallelismLevel == 1) {
Peter Collingbourne80186a52016-09-23 21:33:43 +0000312 codegen(C, TM.get(), AddStream, 0, *Mod);
Mehdi Aminiadc0e262016-08-23 21:30:12 +0000313 } else {
Peter Collingbourne80186a52016-09-23 21:33:43 +0000314 splitCodeGen(C, TM.get(), AddStream, ParallelCodeGenParallelismLevel,
Davide Italiano24c29b12016-09-07 01:08:31 +0000315 std::move(Mod));
Mehdi Aminiadc0e262016-08-23 21:30:12 +0000316 }
Mehdi Amini41af4302016-11-11 04:28:40 +0000317 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000318}
319
Peter Collingbourne80186a52016-09-23 21:33:43 +0000320Error lto::thinBackend(Config &Conf, unsigned Task, AddStreamFn AddStream,
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000321 Module &Mod, ModuleSummaryIndex &CombinedIndex,
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000322 const FunctionImporter::ImportMapTy &ImportList,
323 const GVSummaryMapTy &DefinedGlobals,
Peter Collingbourne1a0720e2016-12-14 01:17:59 +0000324 MapVector<StringRef, BitcodeModule> &ModuleMap) {
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000325 Expected<const Target *> TOrErr = initAndLookupTarget(Conf, Mod);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000326 if (!TOrErr)
327 return TOrErr.takeError();
328
329 std::unique_ptr<TargetMachine> TM =
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000330 createTargetMachine(Conf, Mod.getTargetTriple(), *TOrErr);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000331
Davide Italianodc8e07b2016-09-16 16:05:25 +0000332 handleAsmUndefinedRefs(Mod, *TM);
333
Mehdi Aminid310b472016-08-22 06:25:41 +0000334 if (Conf.CodeGenOnly) {
Peter Collingbourne80186a52016-09-23 21:33:43 +0000335 codegen(Conf, TM.get(), AddStream, Task, Mod);
Mehdi Amini41af4302016-11-11 04:28:40 +0000336 return Error::success();
Mehdi Aminid310b472016-08-22 06:25:41 +0000337 }
338
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000339 if (Conf.PreOptModuleHook && !Conf.PreOptModuleHook(Task, Mod))
Mehdi Amini41af4302016-11-11 04:28:40 +0000340 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000341
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000342 renameModuleForThinLTO(Mod, CombinedIndex);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000343
Mehdi Amini8ac7b322016-08-18 00:59:24 +0000344 thinLTOResolveWeakForLinkerModule(Mod, DefinedGlobals);
345
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000346 if (Conf.PostPromoteModuleHook && !Conf.PostPromoteModuleHook(Task, Mod))
Mehdi Amini41af4302016-11-11 04:28:40 +0000347 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000348
349 if (!DefinedGlobals.empty())
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000350 thinLTOInternalizeModule(Mod, DefinedGlobals);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000351
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000352 if (Conf.PostInternalizeModuleHook &&
353 !Conf.PostInternalizeModuleHook(Task, Mod))
Mehdi Amini41af4302016-11-11 04:28:40 +0000354 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000355
356 auto ModuleLoader = [&](StringRef Identifier) {
Mehdi Amini9ec5a612016-08-23 16:53:34 +0000357 assert(Mod.getContext().isODRUniquingDebugTypes() &&
Davide Italiano63e8f442016-09-14 18:48:43 +0000358 "ODR Type uniquing should be enabled on the context");
Peter Collingbourne1a0720e2016-12-14 01:17:59 +0000359 auto I = ModuleMap.find(Identifier);
360 assert(I != ModuleMap.end());
361 return I->second.getLazyModule(Mod.getContext(),
Teresa Johnsona61f5e32016-12-16 21:25:01 +0000362 /*ShouldLazyLoadMetadata=*/true,
363 /*IsImporting*/ true);
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000364 };
365
366 FunctionImporter Importer(CombinedIndex, ModuleLoader);
Peter Collingbourne7f00d0a2016-11-09 17:49:19 +0000367 if (Error Err = Importer.importFunctions(Mod, ImportList).takeError())
368 return Err;
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000369
Mehdi Aminiacc50c42016-08-16 00:44:46 +0000370 if (Conf.PostImportModuleHook && !Conf.PostImportModuleHook(Task, Mod))
Mehdi Amini41af4302016-11-11 04:28:40 +0000371 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000372
Peter Collingbournee02b74e2017-01-20 22:18:52 +0000373 if (!opt(Conf, TM.get(), Task, Mod, /*IsThinLTO=*/true, CombinedIndex))
Mehdi Amini41af4302016-11-11 04:28:40 +0000374 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000375
Peter Collingbourne80186a52016-09-23 21:33:43 +0000376 codegen(Conf, TM.get(), AddStream, Task, Mod);
Mehdi Amini41af4302016-11-11 04:28:40 +0000377 return Error::success();
Teresa Johnson9ba95f92016-08-11 14:58:12 +0000378}