clang 8.0.0

BackendUtil.cpp
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1 //===--- BackendUtil.cpp - LLVM Backend Utilities -------------------------===//
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 #include "clang/CodeGen/BackendUtil.h"
11 #include "clang/Basic/CodeGenOptions.h"
12 #include "clang/Basic/Diagnostic.h"
13 #include "clang/Basic/LangOptions.h"
14 #include "clang/Basic/TargetOptions.h"
15 #include "clang/Frontend/FrontendDiagnostic.h"
16 #include "clang/Frontend/Utils.h"
17 #include "clang/Lex/HeaderSearchOptions.h"
18 #include "llvm/ADT/SmallSet.h"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/ADT/Triple.h"
22 #include "llvm/Analysis/TargetLibraryInfo.h"
23 #include "llvm/Analysis/TargetTransformInfo.h"
24 #include "llvm/Bitcode/BitcodeReader.h"
25 #include "llvm/Bitcode/BitcodeWriter.h"
26 #include "llvm/Bitcode/BitcodeWriterPass.h"
27 #include "llvm/CodeGen/RegAllocRegistry.h"
28 #include "llvm/CodeGen/SchedulerRegistry.h"
29 #include "llvm/CodeGen/TargetSubtargetInfo.h"
30 #include "llvm/IR/DataLayout.h"
31 #include "llvm/IR/IRPrintingPasses.h"
32 #include "llvm/IR/LegacyPassManager.h"
33 #include "llvm/IR/Module.h"
34 #include "llvm/IR/ModuleSummaryIndex.h"
35 #include "llvm/IR/Verifier.h"
36 #include "llvm/LTO/LTOBackend.h"
37 #include "llvm/MC/MCAsmInfo.h"
38 #include "llvm/MC/SubtargetFeature.h"
39 #include "llvm/Passes/PassBuilder.h"
40 #include "llvm/Support/BuryPointer.h"
41 #include "llvm/Support/CommandLine.h"
42 #include "llvm/Support/MemoryBuffer.h"
43 #include "llvm/Support/PrettyStackTrace.h"
44 #include "llvm/Support/TargetRegistry.h"
45 #include "llvm/Support/Timer.h"
46 #include "llvm/Support/raw_ostream.h"
47 #include "llvm/Target/TargetMachine.h"
48 #include "llvm/Target/TargetOptions.h"
49 #include "llvm/Transforms/Coroutines.h"
50 #include "llvm/Transforms/IPO.h"
51 #include "llvm/Transforms/IPO/AlwaysInliner.h"
52 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
53 #include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
54 #include "llvm/Transforms/InstCombine/InstCombine.h"
55 #include "llvm/Transforms/Instrumentation.h"
56 #include "llvm/Transforms/Instrumentation/BoundsChecking.h"
57 #include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
58 #include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
59 #include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
60 #include "llvm/Transforms/ObjCARC.h"
61 #include "llvm/Transforms/Scalar.h"
62 #include "llvm/Transforms/Scalar/GVN.h"
63 #include "llvm/Transforms/Utils.h"
64 #include "llvm/Transforms/Utils/CanonicalizeAliases.h"
65 #include "llvm/Transforms/Utils/NameAnonGlobals.h"
66 #include "llvm/Transforms/Utils/SymbolRewriter.h"
67 #include <memory>
68 using namespace clang;
69 using namespace llvm;
70
71 namespace {
72
73 // Default filename used for profile generation.
74 static constexpr StringLiteral DefaultProfileGenName = "default_%m.profraw";
75
76 class EmitAssemblyHelper {
77 DiagnosticsEngine &Diags;
78 const HeaderSearchOptions &HSOpts;
79 const CodeGenOptions &CodeGenOpts;
80 const clang::TargetOptions &TargetOpts;
81 const LangOptions &LangOpts;
82 Module *TheModule;
83
84 Timer CodeGenerationTime;
85
86 std::unique_ptr<raw_pwrite_stream> OS;
87
88 TargetIRAnalysis getTargetIRAnalysis() const {
89 if (TM)
90 return TM->getTargetIRAnalysis();
91
92 return TargetIRAnalysis();
93 }
94
95 void CreatePasses(legacy::PassManager &MPM, legacy::FunctionPassManager &FPM);
96
97 /// Generates the TargetMachine.
98 /// Leaves TM unchanged if it is unable to create the target machine.
99 /// Some of our clang tests specify triples which are not built
100 /// into clang. This is okay because these tests check the generated
101 /// IR, and they require DataLayout which depends on the triple.
102 /// In this case, we allow this method to fail and not report an error.
103 /// When MustCreateTM is used, we print an error if we are unable to load
104 /// the requested target.
105 void CreateTargetMachine(bool MustCreateTM);
106
107 /// Add passes necessary to emit assembly or LLVM IR.
108 ///
109 /// \return True on success.
110 bool AddEmitPasses(legacy::PassManager &CodeGenPasses, BackendAction Action,
111 raw_pwrite_stream &OS, raw_pwrite_stream *DwoOS);
112
113 std::unique_ptr<llvm::ToolOutputFile> openOutputFile(StringRef Path) {
114 std::error_code EC;
115 auto F = llvm::make_unique<llvm::ToolOutputFile>(Path, EC,
116 llvm::sys::fs::F_None);
117 if (EC) {
118 Diags.Report(diag::err_fe_unable_to_open_output) << Path << EC.message();
119 F.reset();
120 }
121 return F;
122 }
123
124 public:
125 EmitAssemblyHelper(DiagnosticsEngine &_Diags,
126 const HeaderSearchOptions &HeaderSearchOpts,
127 const CodeGenOptions &CGOpts,
128 const clang::TargetOptions &TOpts,
129 const LangOptions &LOpts, Module *M)
130 : Diags(_Diags), HSOpts(HeaderSearchOpts), CodeGenOpts(CGOpts),
131 TargetOpts(TOpts), LangOpts(LOpts), TheModule(M),
132 CodeGenerationTime("codegen", "Code Generation Time") {}
133
134 ~EmitAssemblyHelper() {
135 if (CodeGenOpts.DisableFree)
136 BuryPointer(std::move(TM));
137 }
138
139 std::unique_ptr<TargetMachine> TM;
140
141 void EmitAssembly(BackendAction Action,
142 std::unique_ptr<raw_pwrite_stream> OS);
143
144 void EmitAssemblyWithNewPassManager(BackendAction Action,
145 std::unique_ptr<raw_pwrite_stream> OS);
146 };
147
148 // We need this wrapper to access LangOpts and CGOpts from extension functions
149 // that we add to the PassManagerBuilder.
150 class PassManagerBuilderWrapper : public PassManagerBuilder {
151 public:
152 PassManagerBuilderWrapper(const Triple &TargetTriple,
153 const CodeGenOptions &CGOpts,
154 const LangOptions &LangOpts)
155 : PassManagerBuilder(), TargetTriple(TargetTriple), CGOpts(CGOpts),
156 LangOpts(LangOpts) {}
157 const Triple &getTargetTriple() const { return TargetTriple; }
158 const CodeGenOptions &getCGOpts() const { return CGOpts; }
159 const LangOptions &getLangOpts() const { return LangOpts; }
160
161 private:
162 const Triple &TargetTriple;
163 const CodeGenOptions &CGOpts;
164 const LangOptions &LangOpts;
165 };
166 }
167
168 static void addObjCARCAPElimPass(const PassManagerBuilder &Builder, PassManagerBase &PM) {
169 if (Builder.OptLevel > 0)
170 PM.add(createObjCARCAPElimPass());
171 }
172
173 static void addObjCARCExpandPass(const PassManagerBuilder &Builder, PassManagerBase &PM) {
174 if (Builder.OptLevel > 0)
175 PM.add(createObjCARCExpandPass());
176 }
177
178 static void addObjCARCOptPass(const PassManagerBuilder &Builder, PassManagerBase &PM) {
179 if (Builder.OptLevel > 0)
180 PM.add(createObjCARCOptPass());
181 }
182
183 static void addAddDiscriminatorsPass(const PassManagerBuilder &Builder,
184 legacy::PassManagerBase &PM) {
185 PM.add(createAddDiscriminatorsPass());
186 }
187
188 static void addBoundsCheckingPass(const PassManagerBuilder &Builder,
189 legacy::PassManagerBase &PM) {
190 PM.add(createBoundsCheckingLegacyPass());
191 }
192
193 static void addSanitizerCoveragePass(const PassManagerBuilder &Builder,
194 legacy::PassManagerBase &PM) {
195 const PassManagerBuilderWrapper &BuilderWrapper =
196 static_cast<const PassManagerBuilderWrapper&>(Builder);
197 const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
198 SanitizerCoverageOptions Opts;
199 Opts.CoverageType =
200 static_cast<SanitizerCoverageOptions::Type>(CGOpts.SanitizeCoverageType);
201 Opts.IndirectCalls = CGOpts.SanitizeCoverageIndirectCalls;
202 Opts.TraceBB = CGOpts.SanitizeCoverageTraceBB;
203 Opts.TraceCmp = CGOpts.SanitizeCoverageTraceCmp;
204 Opts.TraceDiv = CGOpts.SanitizeCoverageTraceDiv;
205 Opts.TraceGep = CGOpts.SanitizeCoverageTraceGep;
206 Opts.Use8bitCounters = CGOpts.SanitizeCoverage8bitCounters;
207 Opts.TracePC = CGOpts.SanitizeCoverageTracePC;
208 Opts.TracePCGuard = CGOpts.SanitizeCoverageTracePCGuard;
209 Opts.NoPrune = CGOpts.SanitizeCoverageNoPrune;
210 Opts.Inline8bitCounters = CGOpts.SanitizeCoverageInline8bitCounters;
211 Opts.PCTable = CGOpts.SanitizeCoveragePCTable;
212 Opts.StackDepth = CGOpts.SanitizeCoverageStackDepth;
213 PM.add(createSanitizerCoverageModulePass(Opts));
214 }
215
216 // Check if ASan should use GC-friendly instrumentation for globals.
217 // First of all, there is no point if -fdata-sections is off (expect for MachO,
218 // where this is not a factor). Also, on ELF this feature requires an assembler
219 // extension that only works with -integrated-as at the moment.
220 static bool asanUseGlobalsGC(const Triple &T, const CodeGenOptions &CGOpts) {
221 if (!CGOpts.SanitizeAddressGlobalsDeadStripping)
222 return false;
223 switch (T.getObjectFormat()) {
224 case Triple::MachO:
225 case Triple::COFF:
226 return true;
227 case Triple::ELF:
228 return CGOpts.DataSections && !CGOpts.DisableIntegratedAS;
229 default:
230 return false;
231 }
232 }
233
234 static void addAddressSanitizerPasses(const PassManagerBuilder &Builder,
235 legacy::PassManagerBase &PM) {
236 const PassManagerBuilderWrapper &BuilderWrapper =
237 static_cast<const PassManagerBuilderWrapper&>(Builder);
238 const Triple &T = BuilderWrapper.getTargetTriple();
239 const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
240 bool Recover = CGOpts.SanitizeRecover.has(SanitizerKind::Address);
241 bool UseAfterScope = CGOpts.SanitizeAddressUseAfterScope;
242 bool UseOdrIndicator = CGOpts.SanitizeAddressUseOdrIndicator;
243 bool UseGlobalsGC = asanUseGlobalsGC(T, CGOpts);
244 PM.add(createAddressSanitizerFunctionPass(/*CompileKernel*/ false, Recover,
245 UseAfterScope));
246 PM.add(createAddressSanitizerModulePass(/*CompileKernel*/ false, Recover,
247 UseGlobalsGC, UseOdrIndicator));
248 }
249
250 static void addKernelAddressSanitizerPasses(const PassManagerBuilder &Builder,
251 legacy::PassManagerBase &PM) {
252 PM.add(createAddressSanitizerFunctionPass(
253 /*CompileKernel*/ true, /*Recover*/ true, /*UseAfterScope*/ false));
254 PM.add(createAddressSanitizerModulePass(
255 /*CompileKernel*/ true, /*Recover*/ true, /*UseGlobalsGC*/ true,
256 /*UseOdrIndicator*/ false));
257 }
258
259 static void addHWAddressSanitizerPasses(const PassManagerBuilder &Builder,
260 legacy::PassManagerBase &PM) {
261 const PassManagerBuilderWrapper &BuilderWrapper =
262 static_cast<const PassManagerBuilderWrapper &>(Builder);
263 const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
264 bool Recover = CGOpts.SanitizeRecover.has(SanitizerKind::HWAddress);
265 PM.add(createHWAddressSanitizerPass(/*CompileKernel*/ false, Recover));
266 }
267
268 static void addKernelHWAddressSanitizerPasses(const PassManagerBuilder &Builder,
269 legacy::PassManagerBase &PM) {
270 PM.add(createHWAddressSanitizerPass(
271 /*CompileKernel*/ true, /*Recover*/ true));
272 }
273
274 static void addGeneralOptsForMemorySanitizer(const PassManagerBuilder &Builder,
275 legacy::PassManagerBase &PM,
276 bool CompileKernel) {
277 const PassManagerBuilderWrapper &BuilderWrapper =
278 static_cast<const PassManagerBuilderWrapper&>(Builder);
279 const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
280 int TrackOrigins = CGOpts.SanitizeMemoryTrackOrigins;
281 bool Recover = CGOpts.SanitizeRecover.has(SanitizerKind::Memory);
282 PM.add(createMemorySanitizerLegacyPassPass(TrackOrigins, Recover, CompileKernel));
283
284 // MemorySanitizer inserts complex instrumentation that mostly follows
285 // the logic of the original code, but operates on "shadow" values.
286 // It can benefit from re-running some general purpose optimization passes.
287 if (Builder.OptLevel > 0) {
288 PM.add(createEarlyCSEPass());
289 PM.add(createReassociatePass());
290 PM.add(createLICMPass());
291 PM.add(createGVNPass());
292 PM.add(createInstructionCombiningPass());
293 PM.add(createDeadStoreEliminationPass());
294 }
295 }
296
297 static void addMemorySanitizerPass(const PassManagerBuilder &Builder,
298 legacy::PassManagerBase &PM) {
299 addGeneralOptsForMemorySanitizer(Builder, PM, /*CompileKernel*/ false);
300 }
301
302 static void addKernelMemorySanitizerPass(const PassManagerBuilder &Builder,
303 legacy::PassManagerBase &PM) {
304 addGeneralOptsForMemorySanitizer(Builder, PM, /*CompileKernel*/ true);
305 }
306
307 static void addThreadSanitizerPass(const PassManagerBuilder &Builder,
308 legacy::PassManagerBase &PM) {
309 PM.add(createThreadSanitizerLegacyPassPass());
310 }
311
312 static void addDataFlowSanitizerPass(const PassManagerBuilder &Builder,
313 legacy::PassManagerBase &PM) {
314 const PassManagerBuilderWrapper &BuilderWrapper =
315 static_cast<const PassManagerBuilderWrapper&>(Builder);
316 const LangOptions &LangOpts = BuilderWrapper.getLangOpts();
317 PM.add(createDataFlowSanitizerPass(LangOpts.SanitizerBlacklistFiles));
318 }
319
320 static void addEfficiencySanitizerPass(const PassManagerBuilder &Builder,
321 legacy::PassManagerBase &PM) {
322 const PassManagerBuilderWrapper &BuilderWrapper =
323 static_cast<const PassManagerBuilderWrapper&>(Builder);
324 const LangOptions &LangOpts = BuilderWrapper.getLangOpts();
325 EfficiencySanitizerOptions Opts;
326 if (LangOpts.Sanitize.has(SanitizerKind::EfficiencyCacheFrag))
327 Opts.ToolType = EfficiencySanitizerOptions::ESAN_CacheFrag;
328 else if (LangOpts.Sanitize.has(SanitizerKind::EfficiencyWorkingSet))
329 Opts.ToolType = EfficiencySanitizerOptions::ESAN_WorkingSet;
330 PM.add(createEfficiencySanitizerPass(Opts));
331 }
332
333 static TargetLibraryInfoImpl *createTLII(llvm::Triple &TargetTriple,
334 const CodeGenOptions &CodeGenOpts) {
335 TargetLibraryInfoImpl *TLII = new TargetLibraryInfoImpl(TargetTriple);
336 if (!CodeGenOpts.SimplifyLibCalls)
337 TLII->disableAllFunctions();
338 else {
339 // Disable individual libc/libm calls in TargetLibraryInfo.
340 LibFunc F;
341 for (auto &FuncName : CodeGenOpts.getNoBuiltinFuncs())
342 if (TLII->getLibFunc(FuncName, F))
343 TLII->setUnavailable(F);
344 }
345
346 switch (CodeGenOpts.getVecLib()) {
347 case CodeGenOptions::Accelerate:
348 TLII->addVectorizableFunctionsFromVecLib(TargetLibraryInfoImpl::Accelerate);
349 break;
350 case CodeGenOptions::SVML:
351 TLII->addVectorizableFunctionsFromVecLib(TargetLibraryInfoImpl::SVML);
352 break;
353 default:
354 break;
355 }
356 return TLII;
357 }
358
359 static void addSymbolRewriterPass(const CodeGenOptions &Opts,
360 legacy::PassManager *MPM) {
361 llvm::SymbolRewriter::RewriteDescriptorList DL;
362
363 llvm::SymbolRewriter::RewriteMapParser MapParser;
364 for (const auto &MapFile : Opts.RewriteMapFiles)
365 MapParser.parse(MapFile, &DL);
366
367 MPM->add(createRewriteSymbolsPass(DL));
368 }
369
370 static CodeGenOpt::Level getCGOptLevel(const CodeGenOptions &CodeGenOpts) {
371 switch (CodeGenOpts.OptimizationLevel) {
372 default:
373 llvm_unreachable("Invalid optimization level!");
374 case 0:
375 return CodeGenOpt::None;
376 case 1:
377 return CodeGenOpt::Less;
378 case 2:
379 return CodeGenOpt::Default; // O2/Os/Oz
380 case 3:
381 return CodeGenOpt::Aggressive;
382 }
383 }
384
385 static Optional<llvm::CodeModel::Model>
386 getCodeModel(const CodeGenOptions &CodeGenOpts) {
387 unsigned CodeModel = llvm::StringSwitch<unsigned>(CodeGenOpts.CodeModel)
388 .Case("tiny", llvm::CodeModel::Tiny)
389 .Case("small", llvm::CodeModel::Small)
390 .Case("kernel", llvm::CodeModel::Kernel)
391 .Case("medium", llvm::CodeModel::Medium)
392 .Case("large", llvm::CodeModel::Large)
393 .Case("default", ~1u)
394 .Default(~0u);
395 assert(CodeModel != ~0u && "invalid code model!");
396 if (CodeModel == ~1u)
397 return None;
398 return static_cast<llvm::CodeModel::Model>(CodeModel);
399 }
400
401 static TargetMachine::CodeGenFileType getCodeGenFileType(BackendAction Action) {
402 if (Action == Backend_EmitObj)
403 return TargetMachine::CGFT_ObjectFile;
404 else if (Action == Backend_EmitMCNull)
405 return TargetMachine::CGFT_Null;
406 else {
407 assert(Action == Backend_EmitAssembly && "Invalid action!");
408 return TargetMachine::CGFT_AssemblyFile;
409 }
410 }
411
412 static void initTargetOptions(llvm::TargetOptions &Options,
413 const CodeGenOptions &CodeGenOpts,
414 const clang::TargetOptions &TargetOpts,
415 const LangOptions &LangOpts,
416 const HeaderSearchOptions &HSOpts) {
417 Options.ThreadModel =
418 llvm::StringSwitch<llvm::ThreadModel::Model>(CodeGenOpts.ThreadModel)
419 .Case("posix", llvm::ThreadModel::POSIX)
420 .Case("single", llvm::ThreadModel::Single);
421
422 // Set float ABI type.
423 assert((CodeGenOpts.FloatABI == "soft" || CodeGenOpts.FloatABI == "softfp" ||
424 CodeGenOpts.FloatABI == "hard" || CodeGenOpts.FloatABI.empty()) &&
425 "Invalid Floating Point ABI!");
426 Options.FloatABIType =
427 llvm::StringSwitch<llvm::FloatABI::ABIType>(CodeGenOpts.FloatABI)
428 .Case("soft", llvm::FloatABI::Soft)
429 .Case("softfp", llvm::FloatABI::Soft)
430 .Case("hard", llvm::FloatABI::Hard)
431 .Default(llvm::FloatABI::Default);
432
433 // Set FP fusion mode.
434 switch (LangOpts.getDefaultFPContractMode()) {
435 case LangOptions::FPC_Off:
436 // Preserve any contraction performed by the front-end. (Strict performs
437 // splitting of the muladd intrinsic in the backend.)
438 Options.AllowFPOpFusion = llvm::FPOpFusion::Standard;
439 break;
440 case LangOptions::FPC_On:
441 Options.AllowFPOpFusion = llvm::FPOpFusion::Standard;
442 break;
443 case LangOptions::FPC_Fast:
444 Options.AllowFPOpFusion = llvm::FPOpFusion::Fast;
445 break;
446 }
447
448 Options.UseInitArray = CodeGenOpts.UseInitArray;
449 Options.DisableIntegratedAS = CodeGenOpts.DisableIntegratedAS;
450 Options.CompressDebugSections = CodeGenOpts.getCompressDebugSections();
451 Options.RelaxELFRelocations = CodeGenOpts.RelaxELFRelocations;
452
453 // Set EABI version.
454 Options.EABIVersion = TargetOpts.EABIVersion;
455
456 if (LangOpts.SjLjExceptions)
457 Options.ExceptionModel = llvm::ExceptionHandling::SjLj;
458 if (LangOpts.SEHExceptions)
459 Options.ExceptionModel = llvm::ExceptionHandling::WinEH;
460 if (LangOpts.DWARFExceptions)
461 Options.ExceptionModel = llvm::ExceptionHandling::DwarfCFI;
462
463 Options.NoInfsFPMath = CodeGenOpts.NoInfsFPMath;
464 Options.NoNaNsFPMath = CodeGenOpts.NoNaNsFPMath;
465 Options.NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
466 Options.UnsafeFPMath = CodeGenOpts.UnsafeFPMath;
467 Options.StackAlignmentOverride = CodeGenOpts.StackAlignment;
468 Options.FunctionSections = CodeGenOpts.FunctionSections;
469 Options.DataSections = CodeGenOpts.DataSections;
470 Options.UniqueSectionNames = CodeGenOpts.UniqueSectionNames;
471 Options.EmulatedTLS = CodeGenOpts.EmulatedTLS;
472 Options.ExplicitEmulatedTLS = CodeGenOpts.ExplicitEmulatedTLS;
473 Options.DebuggerTuning = CodeGenOpts.getDebuggerTuning();
474 Options.EmitStackSizeSection = CodeGenOpts.StackSizeSection;
475 Options.EmitAddrsig = CodeGenOpts.Addrsig;
476
477 if (CodeGenOpts.getSplitDwarfMode() != CodeGenOptions::NoFission)
478 Options.MCOptions.SplitDwarfFile = CodeGenOpts.SplitDwarfFile;
479 Options.MCOptions.MCRelaxAll = CodeGenOpts.RelaxAll;
480 Options.MCOptions.MCSaveTempLabels = CodeGenOpts.SaveTempLabels;
481 Options.MCOptions.MCUseDwarfDirectory = !CodeGenOpts.NoDwarfDirectoryAsm;
482 Options.MCOptions.MCNoExecStack = CodeGenOpts.NoExecStack;
483 Options.MCOptions.MCIncrementalLinkerCompatible =
484 CodeGenOpts.IncrementalLinkerCompatible;
485 Options.MCOptions.MCPIECopyRelocations = CodeGenOpts.PIECopyRelocations;
486 Options.MCOptions.MCFatalWarnings = CodeGenOpts.FatalWarnings;
487 Options.MCOptions.AsmVerbose = CodeGenOpts.AsmVerbose;
488 Options.MCOptions.PreserveAsmComments = CodeGenOpts.PreserveAsmComments;
489 Options.MCOptions.ABIName = TargetOpts.ABI;
490 for (const auto &Entry : HSOpts.UserEntries)
491 if (!Entry.IsFramework &&
492 (Entry.Group == frontend::IncludeDirGroup::Quoted ||
493 Entry.Group == frontend::IncludeDirGroup::Angled ||
494 Entry.Group == frontend::IncludeDirGroup::System))
495 Options.MCOptions.IASSearchPaths.push_back(
496 Entry.IgnoreSysRoot ? Entry.Path : HSOpts.Sysroot + Entry.Path);
497 }
498 static Optional<GCOVOptions> getGCOVOptions(const CodeGenOptions &CodeGenOpts) {
499 if (CodeGenOpts.DisableGCov)
500 return None;
501 if (!CodeGenOpts.EmitGcovArcs && !CodeGenOpts.EmitGcovNotes)
502 return None;
503 // Not using 'GCOVOptions::getDefault' allows us to avoid exiting if
504 // LLVM's -default-gcov-version flag is set to something invalid.
505 GCOVOptions Options;
506 Options.EmitNotes = CodeGenOpts.EmitGcovNotes;
507 Options.EmitData = CodeGenOpts.EmitGcovArcs;
508 llvm::copy(CodeGenOpts.CoverageVersion, std::begin(Options.Version));
509 Options.UseCfgChecksum = CodeGenOpts.CoverageExtraChecksum;
510 Options.NoRedZone = CodeGenOpts.DisableRedZone;
511 Options.FunctionNamesInData = !CodeGenOpts.CoverageNoFunctionNamesInData;
512 Options.Filter = CodeGenOpts.ProfileFilterFiles;
513 Options.Exclude = CodeGenOpts.ProfileExcludeFiles;
514 Options.ExitBlockBeforeBody = CodeGenOpts.CoverageExitBlockBeforeBody;
515 return Options;
516 }
517
518 void EmitAssemblyHelper::CreatePasses(legacy::PassManager &MPM,
519 legacy::FunctionPassManager &FPM) {
520 // Handle disabling of all LLVM passes, where we want to preserve the
521 // internal module before any optimization.
522 if (CodeGenOpts.DisableLLVMPasses)
523 return;
524
525 // Figure out TargetLibraryInfo. This needs to be added to MPM and FPM
526 // manually (and not via PMBuilder), since some passes (eg. InstrProfiling)
527 // are inserted before PMBuilder ones - they'd get the default-constructed
528 // TLI with an unknown target otherwise.
529 Triple TargetTriple(TheModule->getTargetTriple());
530 std::unique_ptr<TargetLibraryInfoImpl> TLII(
531 createTLII(TargetTriple, CodeGenOpts));
532
533 PassManagerBuilderWrapper PMBuilder(TargetTriple, CodeGenOpts, LangOpts);
534
535 // At O0 and O1 we only run the always inliner which is more efficient. At
536 // higher optimization levels we run the normal inliner.
537 if (CodeGenOpts.OptimizationLevel <= 1) {
538 bool InsertLifetimeIntrinsics = (CodeGenOpts.OptimizationLevel != 0 &&
539 !CodeGenOpts.DisableLifetimeMarkers);
540 PMBuilder.Inliner = createAlwaysInlinerLegacyPass(InsertLifetimeIntrinsics);
541 } else {
542 // We do not want to inline hot callsites for SamplePGO module-summary build
543 // because profile annotation will happen again in ThinLTO backend, and we
544 // want the IR of the hot path to match the profile.
545 PMBuilder.Inliner = createFunctionInliningPass(
546 CodeGenOpts.OptimizationLevel, CodeGenOpts.OptimizeSize,
547 (!CodeGenOpts.SampleProfileFile.empty() &&
548 CodeGenOpts.PrepareForThinLTO));
549 }
550
551 PMBuilder.OptLevel = CodeGenOpts.OptimizationLevel;
552 PMBuilder.SizeLevel = CodeGenOpts.OptimizeSize;
553 PMBuilder.SLPVectorize = CodeGenOpts.VectorizeSLP;
554 PMBuilder.LoopVectorize = CodeGenOpts.VectorizeLoop;
555
556 PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops;
557 PMBuilder.MergeFunctions = CodeGenOpts.MergeFunctions;
558 PMBuilder.PrepareForThinLTO = CodeGenOpts.PrepareForThinLTO;
559 PMBuilder.PrepareForLTO = CodeGenOpts.PrepareForLTO;
560 PMBuilder.RerollLoops = CodeGenOpts.RerollLoops;
561
562 MPM.add(new TargetLibraryInfoWrapperPass(*TLII));
563
564 if (TM)
565 TM->adjustPassManager(PMBuilder);
566
567 if (CodeGenOpts.DebugInfoForProfiling ||
568 !CodeGenOpts.SampleProfileFile.empty())
569 PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
570 addAddDiscriminatorsPass);
571
572 // In ObjC ARC mode, add the main ARC optimization passes.
573 if (LangOpts.ObjCAutoRefCount) {
574 PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
575 addObjCARCExpandPass);
576 PMBuilder.addExtension(PassManagerBuilder::EP_ModuleOptimizerEarly,
577 addObjCARCAPElimPass);
578 PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
579 addObjCARCOptPass);
580 }
581
582 if (LangOpts.CoroutinesTS)
583 addCoroutinePassesToExtensionPoints(PMBuilder);
584
585 if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds)) {
586 PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
587 addBoundsCheckingPass);
588 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
589 addBoundsCheckingPass);
590 }
591
592 if (CodeGenOpts.SanitizeCoverageType ||
593 CodeGenOpts.SanitizeCoverageIndirectCalls ||
594 CodeGenOpts.SanitizeCoverageTraceCmp) {
595 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
596 addSanitizerCoveragePass);
597 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
598 addSanitizerCoveragePass);
599 }
600
601 if (LangOpts.Sanitize.has(SanitizerKind::Address)) {
602 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
603 addAddressSanitizerPasses);
604 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
605 addAddressSanitizerPasses);
606 }
607
608 if (LangOpts.Sanitize.has(SanitizerKind::KernelAddress)) {
609 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
610 addKernelAddressSanitizerPasses);
611 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
612 addKernelAddressSanitizerPasses);
613 }
614
615 if (LangOpts.Sanitize.has(SanitizerKind::HWAddress)) {
616 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
617 addHWAddressSanitizerPasses);
618 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
619 addHWAddressSanitizerPasses);
620 }
621
622 if (LangOpts.Sanitize.has(SanitizerKind::KernelHWAddress)) {
623 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
624 addKernelHWAddressSanitizerPasses);
625 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
626 addKernelHWAddressSanitizerPasses);
627 }
628
629 if (LangOpts.Sanitize.has(SanitizerKind::Memory)) {
630 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
631 addMemorySanitizerPass);
632 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
633 addMemorySanitizerPass);
634 }
635
636 if (LangOpts.Sanitize.has(SanitizerKind::KernelMemory)) {
637 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
638 addKernelMemorySanitizerPass);
639 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
640 addKernelMemorySanitizerPass);
641 }
642
643 if (LangOpts.Sanitize.has(SanitizerKind::Thread)) {
644 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
645 addThreadSanitizerPass);
646 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
647 addThreadSanitizerPass);
648 }
649
650 if (LangOpts.Sanitize.has(SanitizerKind::DataFlow)) {
651 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
652 addDataFlowSanitizerPass);
653 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
654 addDataFlowSanitizerPass);
655 }
656
657 if (LangOpts.Sanitize.hasOneOf(SanitizerKind::Efficiency)) {
658 PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
659 addEfficiencySanitizerPass);
660 PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
661 addEfficiencySanitizerPass);
662 }
663
664 // Set up the per-function pass manager.
665 FPM.add(new TargetLibraryInfoWrapperPass(*TLII));
666 if (CodeGenOpts.VerifyModule)
667 FPM.add(createVerifierPass());
668
669 // Set up the per-module pass manager.
670 if (!CodeGenOpts.RewriteMapFiles.empty())
671 addSymbolRewriterPass(CodeGenOpts, &MPM);
672
673 if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts)) {
674 MPM.add(createGCOVProfilerPass(*Options));
675 if (CodeGenOpts.getDebugInfo() == codegenoptions::NoDebugInfo)
676 MPM.add(createStripSymbolsPass(true));
677 }
678
679 if (CodeGenOpts.hasProfileClangInstr()) {
680 InstrProfOptions Options;
681 Options.NoRedZone = CodeGenOpts.DisableRedZone;
682 Options.InstrProfileOutput = CodeGenOpts.InstrProfileOutput;
683
684 // TODO: Surface the option to emit atomic profile counter increments at
685 // the driver level.
686 Options.Atomic = LangOpts.Sanitize.has(SanitizerKind::Thread);
687
688 MPM.add(createInstrProfilingLegacyPass(Options));
689 }
690 if (CodeGenOpts.hasProfileIRInstr()) {
691 PMBuilder.EnablePGOInstrGen = true;
692 if (!CodeGenOpts.InstrProfileOutput.empty())
693 PMBuilder.PGOInstrGen = CodeGenOpts.InstrProfileOutput;
694 else
695 PMBuilder.PGOInstrGen = DefaultProfileGenName;
696 }
697 if (CodeGenOpts.hasProfileIRUse())
698 PMBuilder.PGOInstrUse = CodeGenOpts.ProfileInstrumentUsePath;
699
700 if (!CodeGenOpts.SampleProfileFile.empty())
701 PMBuilder.PGOSampleUse = CodeGenOpts.SampleProfileFile;
702
703 PMBuilder.populateFunctionPassManager(FPM);
704 PMBuilder.populateModulePassManager(MPM);
705 }
706
707 static void setCommandLineOpts(const CodeGenOptions &CodeGenOpts) {
708 SmallVector<const char *, 16> BackendArgs;
709 BackendArgs.push_back("clang"); // Fake program name.
710 if (!CodeGenOpts.DebugPass.empty()) {
711 BackendArgs.push_back("-debug-pass");
712 BackendArgs.push_back(CodeGenOpts.DebugPass.c_str());
713 }
714 if (!CodeGenOpts.LimitFloatPrecision.empty()) {
715 BackendArgs.push_back("-limit-float-precision");
716 BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str());
717 }
718 BackendArgs.push_back(nullptr);
719 llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1,
720 BackendArgs.data());
721 }
722
723 void EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) {
724 // Create the TargetMachine for generating code.
725 std::string Error;
726 std::string Triple = TheModule->getTargetTriple();
727 const llvm::Target *TheTarget = TargetRegistry::lookupTarget(Triple, Error);
728 if (!TheTarget) {
729 if (MustCreateTM)
730 Diags.Report(diag::err_fe_unable_to_create_target) << Error;
731 return;
732 }
733
734 Optional<llvm::CodeModel::Model> CM = getCodeModel(CodeGenOpts);
735 std::string FeaturesStr =
736 llvm::join(TargetOpts.Features.begin(), TargetOpts.Features.end(), ",");
737 llvm::Reloc::Model RM = CodeGenOpts.RelocationModel;
738 CodeGenOpt::Level OptLevel = getCGOptLevel(CodeGenOpts);
739
740 llvm::TargetOptions Options;
741 initTargetOptions(Options, CodeGenOpts, TargetOpts, LangOpts, HSOpts);
742 TM.reset(TheTarget->createTargetMachine(Triple, TargetOpts.CPU, FeaturesStr,
743 Options, RM, CM, OptLevel));
744 }
745
746 bool EmitAssemblyHelper::AddEmitPasses(legacy::PassManager &CodeGenPasses,
747 BackendAction Action,
748 raw_pwrite_stream &OS,
749 raw_pwrite_stream *DwoOS) {
750 // Add LibraryInfo.
751 llvm::Triple TargetTriple(TheModule->getTargetTriple());
752 std::unique_ptr<TargetLibraryInfoImpl> TLII(
753 createTLII(TargetTriple, CodeGenOpts));
754 CodeGenPasses.add(new TargetLibraryInfoWrapperPass(*TLII));
755
756 // Normal mode, emit a .s or .o file by running the code generator. Note,
757 // this also adds codegenerator level optimization passes.
758 TargetMachine::CodeGenFileType CGFT = getCodeGenFileType(Action);
759
760 // Add ObjC ARC final-cleanup optimizations. This is done as part of the
761 // "codegen" passes so that it isn't run multiple times when there is
762 // inlining happening.
763 if (CodeGenOpts.OptimizationLevel > 0)
764 CodeGenPasses.add(createObjCARCContractPass());
765
766 if (TM->addPassesToEmitFile(CodeGenPasses, OS, DwoOS, CGFT,
767 /*DisableVerify=*/!CodeGenOpts.VerifyModule)) {
768 Diags.Report(diag::err_fe_unable_to_interface_with_target);
769 return false;
770 }
771
772 return true;
773 }
774
775 void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
776 std::unique_ptr<raw_pwrite_stream> OS) {
777 TimeRegion Region(FrontendTimesIsEnabled ? &CodeGenerationTime : nullptr);
778
779 setCommandLineOpts(CodeGenOpts);
780
781 bool UsesCodeGen = (Action != Backend_EmitNothing &&
782 Action != Backend_EmitBC &&
783 Action != Backend_EmitLL);
784 CreateTargetMachine(UsesCodeGen);
785
786 if (UsesCodeGen && !TM)
787 return;
788 if (TM)
789 TheModule->setDataLayout(TM->createDataLayout());
790
791 legacy::PassManager PerModulePasses;
792 PerModulePasses.add(
793 createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
794
795 legacy::FunctionPassManager PerFunctionPasses(TheModule);
796 PerFunctionPasses.add(
797 createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
798
799 CreatePasses(PerModulePasses, PerFunctionPasses);
800
801 legacy::PassManager CodeGenPasses;
802 CodeGenPasses.add(
803 createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
804
805 std::unique_ptr<llvm::ToolOutputFile> ThinLinkOS, DwoOS;
806
807 switch (Action) {
808 case Backend_EmitNothing:
809 break;
810
811 case Backend_EmitBC:
812 if (CodeGenOpts.PrepareForThinLTO && !CodeGenOpts.DisableLLVMPasses) {
813 if (!CodeGenOpts.ThinLinkBitcodeFile.empty()) {
814 ThinLinkOS = openOutputFile(CodeGenOpts.ThinLinkBitcodeFile);
815 if (!ThinLinkOS)
816 return;
817 }
818 TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
819 CodeGenOpts.EnableSplitLTOUnit);
820 PerModulePasses.add(createWriteThinLTOBitcodePass(
821 *OS, ThinLinkOS ? &ThinLinkOS->os() : nullptr));
822 } else {
823 // Emit a module summary by default for Regular LTO except for ld64
824 // targets
825 bool EmitLTOSummary =
826 (CodeGenOpts.PrepareForLTO &&
827 !CodeGenOpts.DisableLLVMPasses &&
828 llvm::Triple(TheModule->getTargetTriple()).getVendor() !=
829 llvm::Triple::Apple);
830 if (EmitLTOSummary) {
831 if (!TheModule->getModuleFlag("ThinLTO"))
832 TheModule->addModuleFlag(Module::Error, "ThinLTO", uint32_t(0));
833 TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
834 CodeGenOpts.EnableSplitLTOUnit);
835 }
836
837 PerModulePasses.add(createBitcodeWriterPass(
838 *OS, CodeGenOpts.EmitLLVMUseLists, EmitLTOSummary));
839 }
840 break;
841
842 case Backend_EmitLL:
843 PerModulePasses.add(
844 createPrintModulePass(*OS, "", CodeGenOpts.EmitLLVMUseLists));
845 break;
846
847 default:
848 if (!CodeGenOpts.SplitDwarfFile.empty() &&
849 (CodeGenOpts.getSplitDwarfMode() == CodeGenOptions::SplitFileFission)) {
850 DwoOS = openOutputFile(CodeGenOpts.SplitDwarfFile);
851 if (!DwoOS)
852 return;
853 }
854 if (!AddEmitPasses(CodeGenPasses, Action, *OS,
855 DwoOS ? &DwoOS->os() : nullptr))
856 return;
857 }
858
859 // Before executing passes, print the final values of the LLVM options.
860 cl::PrintOptionValues();
861
862 // Run passes. For now we do all passes at once, but eventually we
863 // would like to have the option of streaming code generation.
864
865 {
866 PrettyStackTraceString CrashInfo("Per-function optimization");
867
868 PerFunctionPasses.doInitialization();
869 for (Function &F : *TheModule)
870 if (!F.isDeclaration())
871 PerFunctionPasses.run(F);
872 PerFunctionPasses.doFinalization();
873 }
874
875 {
876 PrettyStackTraceString CrashInfo("Per-module optimization passes");
877 PerModulePasses.run(*TheModule);
878 }
879
880 {
881 PrettyStackTraceString CrashInfo("Code generation");
882 CodeGenPasses.run(*TheModule);
883 }
884
885 if (ThinLinkOS)
886 ThinLinkOS->keep();
887 if (DwoOS)
888 DwoOS->keep();
889 }
890
891 static PassBuilder::OptimizationLevel mapToLevel(const CodeGenOptions &Opts) {
892 switch (Opts.OptimizationLevel) {
893 default:
894 llvm_unreachable("Invalid optimization level!");
895
896 case 1:
897 return PassBuilder::O1;
898
899 case 2:
900 switch (Opts.OptimizeSize) {
901 default:
902 llvm_unreachable("Invalid optimization level for size!");
903
904 case 0:
905 return PassBuilder::O2;
906
907 case 1:
908 return PassBuilder::Os;
909
910 case 2:
911 return PassBuilder::Oz;
912 }
913
914 case 3:
915 return PassBuilder::O3;
916 }
917 }
918
919 /// A clean version of `EmitAssembly` that uses the new pass manager.
920 ///
921 /// Not all features are currently supported in this system, but where
922 /// necessary it falls back to the legacy pass manager to at least provide
923 /// basic functionality.
924 ///
925 /// This API is planned to have its functionality finished and then to replace
926 /// `EmitAssembly` at some point in the future when the default switches.
927 void EmitAssemblyHelper::EmitAssemblyWithNewPassManager(
928 BackendAction Action, std::unique_ptr<raw_pwrite_stream> OS) {
929 TimeRegion Region(FrontendTimesIsEnabled ? &CodeGenerationTime : nullptr);
930 setCommandLineOpts(CodeGenOpts);
931
932 // The new pass manager always makes a target machine available to passes
933 // during construction.
934 CreateTargetMachine(/*MustCreateTM*/ true);
935 if (!TM)
936 // This will already be diagnosed, just bail.
937 return;
938 TheModule->setDataLayout(TM->createDataLayout());
939
940 Optional<PGOOptions> PGOOpt;
941
942 if (CodeGenOpts.hasProfileIRInstr())
943 // -fprofile-generate.
944 PGOOpt = PGOOptions(CodeGenOpts.InstrProfileOutput.empty()
945 ? DefaultProfileGenName
946 : CodeGenOpts.InstrProfileOutput,
947 "", "", "", true,
948 CodeGenOpts.DebugInfoForProfiling);
949 else if (CodeGenOpts.hasProfileIRUse())
950 // -fprofile-use.
951 PGOOpt = PGOOptions("", CodeGenOpts.ProfileInstrumentUsePath, "",
952 CodeGenOpts.ProfileRemappingFile, false,
953 CodeGenOpts.DebugInfoForProfiling);
954 else if (!CodeGenOpts.SampleProfileFile.empty())
955 // -fprofile-sample-use
956 PGOOpt = PGOOptions("", "", CodeGenOpts.SampleProfileFile,
957 CodeGenOpts.ProfileRemappingFile, false,
958 CodeGenOpts.DebugInfoForProfiling);
959 else if (CodeGenOpts.DebugInfoForProfiling)
960 // -fdebug-info-for-profiling
961 PGOOpt = PGOOptions("", "", "", "", false, true);
962
963 PassBuilder PB(TM.get(), PGOOpt);
964
965 LoopAnalysisManager LAM(CodeGenOpts.DebugPassManager);
966 FunctionAnalysisManager FAM(CodeGenOpts.DebugPassManager);
967 CGSCCAnalysisManager CGAM(CodeGenOpts.DebugPassManager);
968 ModuleAnalysisManager MAM(CodeGenOpts.DebugPassManager);
969
970 // Register the AA manager first so that our version is the one used.
971 FAM.registerPass([&] { return PB.buildDefaultAAPipeline(); });
972
973 // Register the target library analysis directly and give it a customized
974 // preset TLI.
975 Triple TargetTriple(TheModule->getTargetTriple());
976 std::unique_ptr<TargetLibraryInfoImpl> TLII(
977 createTLII(TargetTriple, CodeGenOpts));
978 FAM.registerPass([&] { return TargetLibraryAnalysis(*TLII); });
979 MAM.registerPass([&] { return TargetLibraryAnalysis(*TLII); });
980
981 // Register all the basic analyses with the managers.
982 PB.registerModuleAnalyses(MAM);
983 PB.registerCGSCCAnalyses(CGAM);
984 PB.registerFunctionAnalyses(FAM);
985 PB.registerLoopAnalyses(LAM);
986 PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
987
988 ModulePassManager MPM(CodeGenOpts.DebugPassManager);
989
990 if (!CodeGenOpts.DisableLLVMPasses) {
991 bool IsThinLTO = CodeGenOpts.PrepareForThinLTO;
992 bool IsLTO = CodeGenOpts.PrepareForLTO;
993
994 if (CodeGenOpts.OptimizationLevel == 0) {
995 if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts))
996 MPM.addPass(GCOVProfilerPass(*Options));
997
998 // Build a minimal pipeline based on the semantics required by Clang,
999 // which is just that always inlining occurs.
1000 MPM.addPass(AlwaysInlinerPass());
1001
1002 // At -O0 we directly run necessary sanitizer passes.
1003 if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))
1004 MPM.addPass(createModuleToFunctionPassAdaptor(BoundsCheckingPass()));
1005
1006 // Lastly, add semantically necessary passes for LTO.
1007 if (IsLTO || IsThinLTO) {
1008 MPM.addPass(CanonicalizeAliasesPass());
1009 MPM.addPass(NameAnonGlobalPass());
1010 }
1011 } else {
1012 // Map our optimization levels into one of the distinct levels used to
1013 // configure the pipeline.
1014 PassBuilder::OptimizationLevel Level = mapToLevel(CodeGenOpts);
1015
1016 // Register callbacks to schedule sanitizer passes at the appropriate part of
1017 // the pipeline.
1018 if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))
1019 PB.registerScalarOptimizerLateEPCallback(
1020 [](FunctionPassManager &FPM, PassBuilder::OptimizationLevel Level) {
1021 FPM.addPass(BoundsCheckingPass());
1022 });
1023 if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts))
1024 PB.registerPipelineStartEPCallback([Options](ModulePassManager &MPM) {
1025 MPM.addPass(GCOVProfilerPass(*Options));
1026 });
1027
1028 if (IsThinLTO) {
1029 MPM = PB.buildThinLTOPreLinkDefaultPipeline(
1030 Level, CodeGenOpts.DebugPassManager);
1031 MPM.addPass(CanonicalizeAliasesPass());
1032 MPM.addPass(NameAnonGlobalPass());
1033 } else if (IsLTO) {
1034 MPM = PB.buildLTOPreLinkDefaultPipeline(Level,
1035 CodeGenOpts.DebugPassManager);
1036 MPM.addPass(CanonicalizeAliasesPass());
1037 MPM.addPass(NameAnonGlobalPass());
1038 } else {
1039 MPM = PB.buildPerModuleDefaultPipeline(Level,
1040 CodeGenOpts.DebugPassManager);
1041 }
1042 }
1043 }
1044
1045 // FIXME: We still use the legacy pass manager to do code generation. We
1046 // create that pass manager here and use it as needed below.
1047 legacy::PassManager CodeGenPasses;
1048 bool NeedCodeGen = false;
1049 std::unique_ptr<llvm::ToolOutputFile> ThinLinkOS, DwoOS;
1050
1051 // Append any output we need to the pass manager.
1052 switch (Action) {
1053 case Backend_EmitNothing:
1054 break;
1055
1056 case Backend_EmitBC:
1057 if (CodeGenOpts.PrepareForThinLTO && !CodeGenOpts.DisableLLVMPasses) {
1058 if (!CodeGenOpts.ThinLinkBitcodeFile.empty()) {
1059 ThinLinkOS = openOutputFile(CodeGenOpts.ThinLinkBitcodeFile);
1060 if (!ThinLinkOS)
1061 return;
1062 }
1063 TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
1064 CodeGenOpts.EnableSplitLTOUnit);
1065 MPM.addPass(ThinLTOBitcodeWriterPass(*OS, ThinLinkOS ? &ThinLinkOS->os()
1066 : nullptr));
1067 } else {
1068 // Emit a module summary by default for Regular LTO except for ld64
1069 // targets
1070 bool EmitLTOSummary =
1071 (CodeGenOpts.PrepareForLTO &&
1072 !CodeGenOpts.DisableLLVMPasses &&
1073 llvm::Triple(TheModule->getTargetTriple()).getVendor() !=
1074 llvm::Triple::Apple);
1075 if (EmitLTOSummary) {
1076 if (!TheModule->getModuleFlag("ThinLTO"))
1077 TheModule->addModuleFlag(Module::Error, "ThinLTO", uint32_t(0));
1078 TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
1079 CodeGenOpts.EnableSplitLTOUnit);
1080 }
1081 MPM.addPass(
1082 BitcodeWriterPass(*OS, CodeGenOpts.EmitLLVMUseLists, EmitLTOSummary));
1083 }
1084 break;
1085
1086 case Backend_EmitLL:
1087 MPM.addPass(PrintModulePass(*OS, "", CodeGenOpts.EmitLLVMUseLists));
1088 break;
1089
1090 case Backend_EmitAssembly:
1091 case Backend_EmitMCNull:
1092 case Backend_EmitObj:
1093 NeedCodeGen = true;
1094 CodeGenPasses.add(
1095 createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
1096 if (!CodeGenOpts.SplitDwarfFile.empty()) {
1097 DwoOS = openOutputFile(CodeGenOpts.SplitDwarfFile);
1098 if (!DwoOS)
1099 return;
1100 }
1101 if (!AddEmitPasses(CodeGenPasses, Action, *OS,
1102 DwoOS ? &DwoOS->os() : nullptr))
1103 // FIXME: Should we handle this error differently?
1104 return;
1105 break;
1106 }
1107
1108 // Before executing passes, print the final values of the LLVM options.
1109 cl::PrintOptionValues();
1110
1111 // Now that we have all of the passes ready, run them.
1112 {
1113 PrettyStackTraceString CrashInfo("Optimizer");
1114 MPM.run(*TheModule, MAM);
1115 }
1116
1117 // Now if needed, run the legacy PM for codegen.
1118 if (NeedCodeGen) {
1119 PrettyStackTraceString CrashInfo("Code generation");
1120 CodeGenPasses.run(*TheModule);
1121 }
1122
1123 if (ThinLinkOS)
1124 ThinLinkOS->keep();
1125 if (DwoOS)
1126 DwoOS->keep();
1127 }
1128
1129 Expected<BitcodeModule> clang::FindThinLTOModule(MemoryBufferRef MBRef) {
1130 Expected<std::vector<BitcodeModule>> BMsOrErr = getBitcodeModuleList(MBRef);
1131 if (!BMsOrErr)
1132 return BMsOrErr.takeError();
1133
1134 // The bitcode file may contain multiple modules, we want the one that is
1135 // marked as being the ThinLTO module.
1136 if (const BitcodeModule *Bm = FindThinLTOModule(*BMsOrErr))
1137 return *Bm;
1138
1139 return make_error<StringError>("Could not find module summary",
1140 inconvertibleErrorCode());
1141 }
1142
1143 BitcodeModule *clang::FindThinLTOModule(MutableArrayRef<BitcodeModule> BMs) {
1144 for (BitcodeModule &BM : BMs) {
1145 Expected<BitcodeLTOInfo> LTOInfo = BM.getLTOInfo();
1146 if (LTOInfo && LTOInfo->IsThinLTO)
1147 return &BM;
1148 }
1149 return nullptr;
1150 }
1151
1152 static void runThinLTOBackend(ModuleSummaryIndex *CombinedIndex, Module *M,
1153 const HeaderSearchOptions &HeaderOpts,
1154 const CodeGenOptions &CGOpts,
1155 const clang::TargetOptions &TOpts,
1156 const LangOptions &LOpts,
1157 std::unique_ptr<raw_pwrite_stream> OS,
1158 std::string SampleProfile,
1159 std::string ProfileRemapping,
1160 BackendAction Action) {
1161 StringMap<DenseMap<GlobalValue::GUID, GlobalValueSummary *>>
1162 ModuleToDefinedGVSummaries;
1163 CombinedIndex->collectDefinedGVSummariesPerModule(ModuleToDefinedGVSummaries);
1164
1165 setCommandLineOpts(CGOpts);
1166
1167 // We can simply import the values mentioned in the combined index, since
1168 // we should only invoke this using the individual indexes written out
1169 // via a WriteIndexesThinBackend.
1170 FunctionImporter::ImportMapTy ImportList;
1171 for (auto &GlobalList : *CombinedIndex) {
1172 // Ignore entries for undefined references.
1173 if (GlobalList.second.SummaryList.empty())
1174 continue;
1175
1176 auto GUID = GlobalList.first;
1177 for (auto &Summary : GlobalList.second.SummaryList) {
1178 // Skip the summaries for the importing module. These are included to
1179 // e.g. record required linkage changes.
1180 if (Summary->modulePath() == M->getModuleIdentifier())
1181 continue;
1182 // Add an entry to provoke importing by thinBackend.
1183 ImportList[Summary->modulePath()].insert(GUID);
1184 }
1185 }
1186
1187 std::vector<std::unique_ptr<llvm::MemoryBuffer>> OwnedImports;
1188 MapVector<llvm::StringRef, llvm::BitcodeModule> ModuleMap;
1189
1190 for (auto &I : ImportList) {
1191 ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> MBOrErr =
1192 llvm::MemoryBuffer::getFile(I.first());
1193 if (!MBOrErr) {
1194 errs() << "Error loading imported file '" << I.first()
1195 << "': " << MBOrErr.getError().message() << "\n";
1196 return;
1197 }
1198
1199 Expected<BitcodeModule> BMOrErr = FindThinLTOModule(**MBOrErr);
1200 if (!BMOrErr) {
1201 handleAllErrors(BMOrErr.takeError(), [&](ErrorInfoBase &EIB) {
1202 errs() << "Error loading imported file '" << I.first()
1203 << "': " << EIB.message() << '\n';
1204 });
1205 return;
1206 }
1207 ModuleMap.insert({I.first(), *BMOrErr});
1208
1209 OwnedImports.push_back(std::move(*MBOrErr));
1210 }
1211 auto AddStream = [&](size_t Task) {
1212 return llvm::make_unique<lto::NativeObjectStream>(std::move(OS));
1213 };
1214 lto::Config Conf;
1215 if (CGOpts.SaveTempsFilePrefix != "") {
1216 if (Error E = Conf.addSaveTemps(CGOpts.SaveTempsFilePrefix + ".",
1217 /* UseInputModulePath */ false)) {
1218 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
1219 errs() << "Error setting up ThinLTO save-temps: " << EIB.message()
1220 << '\n';
1221 });
1222 }
1223 }
1224 Conf.CPU = TOpts.CPU;
1225 Conf.CodeModel = getCodeModel(CGOpts);
1226 Conf.MAttrs = TOpts.Features;
1227 Conf.RelocModel = CGOpts.RelocationModel;
1228 Conf.CGOptLevel = getCGOptLevel(CGOpts);
1229 initTargetOptions(Conf.Options, CGOpts, TOpts, LOpts, HeaderOpts);
1230 Conf.SampleProfile = std::move(SampleProfile);
1231 Conf.ProfileRemapping = std::move(ProfileRemapping);
1232 Conf.UseNewPM = CGOpts.ExperimentalNewPassManager;
1233 Conf.DebugPassManager = CGOpts.DebugPassManager;
1234 Conf.RemarksWithHotness = CGOpts.DiagnosticsWithHotness;
1235 Conf.RemarksFilename = CGOpts.OptRecordFile;
1236 Conf.DwoPath = CGOpts.SplitDwarfFile;
1237 switch (Action) {
1238 case Backend_EmitNothing:
1239 Conf.PreCodeGenModuleHook = [](size_t Task, const Module &Mod) {
1240 return false;
1241 };
1242 break;
1243 case Backend_EmitLL:
1244 Conf.PreCodeGenModuleHook = [&](size_t Task, const Module &Mod) {
1245 M->print(*OS, nullptr, CGOpts.EmitLLVMUseLists);
1246 return false;
1247 };
1248 break;
1249 case Backend_EmitBC:
1250 Conf.PreCodeGenModuleHook = [&](size_t Task, const Module &Mod) {
1251 WriteBitcodeToFile(*M, *OS, CGOpts.EmitLLVMUseLists);
1252 return false;
1253 };
1254 break;
1255 default:
1256 Conf.CGFileType = getCodeGenFileType(Action);
1257 break;
1258 }
1259 if (Error E = thinBackend(
1260 Conf, -1, AddStream, *M, *CombinedIndex, ImportList,
1261 ModuleToDefinedGVSummaries[M->getModuleIdentifier()], ModuleMap)) {
1262 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
1263 errs() << "Error running ThinLTO backend: " << EIB.message() << '\n';
1264 });
1265 }
1266 }
1267
1268 void clang::EmitBackendOutput(DiagnosticsEngine &Diags,
1269 const HeaderSearchOptions &HeaderOpts,
1270 const CodeGenOptions &CGOpts,
1271 const clang::TargetOptions &TOpts,
1272 const LangOptions &LOpts,
1273 const llvm::DataLayout &TDesc, Module *M,
1274 BackendAction Action,
1275 std::unique_ptr<raw_pwrite_stream> OS) {
1276 std::unique_ptr<llvm::Module> EmptyModule;
1277 if (!CGOpts.ThinLTOIndexFile.empty()) {
1278 // If we are performing a ThinLTO importing compile, load the function index
1279 // into memory and pass it into runThinLTOBackend, which will run the
1280 // function importer and invoke LTO passes.
1281 Expected<std::unique_ptr<ModuleSummaryIndex>> IndexOrErr =
1282 llvm::getModuleSummaryIndexForFile(CGOpts.ThinLTOIndexFile,
1283 /*IgnoreEmptyThinLTOIndexFile*/true);
1284 if (!IndexOrErr) {
1285 logAllUnhandledErrors(IndexOrErr.takeError(), errs(),
1286 "Error loading index file '" +
1287 CGOpts.ThinLTOIndexFile + "': ");
1288 return;
1289 }
1290 std::unique_ptr<ModuleSummaryIndex> CombinedIndex = std::move(*IndexOrErr);
1291 // A null CombinedIndex means we should skip ThinLTO compilation
1292 // (LLVM will optionally ignore empty index files, returning null instead
1293 // of an error).
1294 if (CombinedIndex) {
1295 if (!CombinedIndex->skipModuleByDistributedBackend()) {
1296 runThinLTOBackend(CombinedIndex.get(), M, HeaderOpts, CGOpts, TOpts,
1297 LOpts, std::move(OS), CGOpts.SampleProfileFile,
1298 CGOpts.ProfileRemappingFile, Action);
1299 return;
1300 }
1301 // Distributed indexing detected that nothing from the module is needed
1302 // for the final linking. So we can skip the compilation. We sill need to
1303 // output an empty object file to make sure that a linker does not fail
1304 // trying to read it. Also for some features, like CFI, we must skip
1305 // the compilation as CombinedIndex does not contain all required
1306 // information.
1307 EmptyModule = llvm::make_unique<llvm::Module>("empty", M->getContext());
1308 EmptyModule->setTargetTriple(M->getTargetTriple());
1309 M = EmptyModule.get();
1310 }
1311 }
1312
1313 EmitAssemblyHelper AsmHelper(Diags, HeaderOpts, CGOpts, TOpts, LOpts, M);
1314
1315 if (CGOpts.ExperimentalNewPassManager)
1316 AsmHelper.EmitAssemblyWithNewPassManager(Action, std::move(OS));
1317 else
1318 AsmHelper.EmitAssembly(Action, std::move(OS));
1319
1320 // Verify clang's TargetInfo DataLayout against the LLVM TargetMachine's
1321 // DataLayout.
1322 if (AsmHelper.TM) {
1323 std::string DLDesc = M->getDataLayout().getStringRepresentation();
1324 if (DLDesc != TDesc.getStringRepresentation()) {
1325 unsigned DiagID = Diags.getCustomDiagID(
1326 DiagnosticsEngine::Error, "backend data layout '%0' does not match "
1327 "expected target description '%1'");
1328 Diags.Report(DiagID) << DLDesc << TDesc.getStringRepresentation();
1329 }
1330 }
1331 }
1332
1333 static const char* getSectionNameForBitcode(const Triple &T) {
1334 switch (T.getObjectFormat()) {
1335 case Triple::MachO:
1336 return "__LLVM,__bitcode";
1337 case Triple::COFF:
1338 case Triple::ELF:
1339 case Triple::Wasm:
1340 case Triple::UnknownObjectFormat:
1341 return ".llvmbc";
1342 }
1343 llvm_unreachable("Unimplemented ObjectFormatType");
1344 }
1345
1346 static const char* getSectionNameForCommandline(const Triple &T) {
1347 switch (T.getObjectFormat()) {
1348 case Triple::MachO:
1349 return "__LLVM,__cmdline";
1350 case Triple::COFF:
1351 case Triple::ELF:
1352 case Triple::Wasm:
1353 case Triple::UnknownObjectFormat:
1354 return ".llvmcmd";
1355 }
1356 llvm_unreachable("Unimplemented ObjectFormatType");
1357 }
1358
1359 // With -fembed-bitcode, save a copy of the llvm IR as data in the
1360 // __LLVM,__bitcode section.
1361 void clang::EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts,
1362 llvm::MemoryBufferRef Buf) {
1363 if (CGOpts.getEmbedBitcode() == CodeGenOptions::Embed_Off)
1364 return;
1365
1366 // Save llvm.compiler.used and remote it.
1367 SmallVector<Constant*, 2> UsedArray;
1368 SmallPtrSet<GlobalValue*, 4> UsedGlobals;
1369 Type *UsedElementType = Type::getInt8Ty(M->getContext())->getPointerTo(0);
1370 GlobalVariable *Used = collectUsedGlobalVariables(*M, UsedGlobals, true);
1371 for (auto *GV : UsedGlobals) {
1372 if (GV->getName() != "llvm.embedded.module" &&
1373 GV->getName() != "llvm.cmdline")
1374 UsedArray.push_back(
1375 ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
1376 }
1377 if (Used)
1378 Used->eraseFromParent();
1379
1380 // Embed the bitcode for the llvm module.
1381 std::string Data;
1382 ArrayRef<uint8_t> ModuleData;
1383 Triple T(M->getTargetTriple());
1384 // Create a constant that contains the bitcode.
1385 // In case of embedding a marker, ignore the input Buf and use the empty
1386 // ArrayRef. It is also legal to create a bitcode marker even Buf is empty.
1387 if (CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Marker) {
1388 if (!isBitcode((const unsigned char *)Buf.getBufferStart(),
1389 (const unsigned char *)Buf.getBufferEnd())) {
1390 // If the input is LLVM Assembly, bitcode is produced by serializing
1391 // the module. Use-lists order need to be perserved in this case.
1392 llvm::raw_string_ostream OS(Data);
1393 llvm::WriteBitcodeToFile(*M, OS, /* ShouldPreserveUseListOrder */ true);
1394 ModuleData =
1395 ArrayRef<uint8_t>((const uint8_t *)OS.str().data(), OS.str().size());
1396 } else
1397 // If the input is LLVM bitcode, write the input byte stream directly.
1398 ModuleData = ArrayRef<uint8_t>((const uint8_t *)Buf.getBufferStart(),
1399 Buf.getBufferSize());
1400 }
1401 llvm::Constant *ModuleConstant =
1402 llvm::ConstantDataArray::get(M->getContext(), ModuleData);
1403 llvm::GlobalVariable *GV = new llvm::GlobalVariable(
1404 *M, ModuleConstant->getType(), true, llvm::GlobalValue::PrivateLinkage,
1405 ModuleConstant);
1406 GV->setSection(getSectionNameForBitcode(T));
1407 UsedArray.push_back(
1408 ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
1409 if (llvm::GlobalVariable *Old =
1410 M->getGlobalVariable("llvm.embedded.module", true)) {
1411 assert(Old->hasOneUse() &&
1412 "llvm.embedded.module can only be used once in llvm.compiler.used");
1413 GV->takeName(Old);
1414 Old->eraseFromParent();
1415 } else {
1416 GV->setName("llvm.embedded.module");
1417 }
1418
1419 // Skip if only bitcode needs to be embedded.
1420 if (CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Bitcode) {
1421 // Embed command-line options.
1422 ArrayRef<uint8_t> CmdData(const_cast<uint8_t *>(CGOpts.CmdArgs.data()),
1423 CGOpts.CmdArgs.size());
1424 llvm::Constant *CmdConstant =
1425 llvm::ConstantDataArray::get(M->getContext(), CmdData);
1426 GV = new llvm::GlobalVariable(*M, CmdConstant->getType(), true,
1427 llvm::GlobalValue::PrivateLinkage,
1428 CmdConstant);
1429 GV->setSection(getSectionNameForCommandline(T));
1430 UsedArray.push_back(
1431 ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
1432 if (llvm::GlobalVariable *Old =
1433 M->getGlobalVariable("llvm.cmdline", true)) {
1434 assert(Old->hasOneUse() &&
1435 "llvm.cmdline can only be used once in llvm.compiler.used");
1436 GV->takeName(Old);
1437 Old->eraseFromParent();
1438 } else {
1439 GV->setName("llvm.cmdline");
1440 }
1441 }
1442
1443 if (UsedArray.empty())
1444 return;
1445
1446 // Recreate llvm.compiler.used.
1447 ArrayType *ATy = ArrayType::get(UsedElementType, UsedArray.size());
1448 auto *NewUsed = new GlobalVariable(
1449 *M, ATy, false, llvm::GlobalValue::AppendingLinkage,
1450 llvm::ConstantArray::get(ATy, UsedArray), "llvm.compiler.used");
1451 NewUsed->setSection("llvm.metadata");
1452 }
clang::CodeGenOptions::ProfileInstrumentUsePath
std::string ProfileInstrumentUsePath
Name of the profile file to use as input for -fprofile-instr-use.
Definition: CodeGenOptions.h:215
clang::frontend::Angled
Paths for &#39;#include <>&#39; added by &#39;-I&#39;.
Definition: HeaderSearchOptions.h:36
addObjCARCExpandPass
static void addObjCARCExpandPass(const PassManagerBuilder &Builder, PassManagerBase &PM)
Definition: BackendUtil.cpp:173
clang::if
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
clang::CodeGenOptions::SaveTempsFilePrefix
std::string SaveTempsFilePrefix
Prefix to use for -save-temps output.
Definition: CodeGenOptions.h:231
clang::Backend_EmitLL
Emit human-readable LLVM assembly.
Definition: BackendUtil.h:34
llvm
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
clang::Backend_EmitMCNull
Run CodeGen, but don&#39;t emit anything.
Definition: BackendUtil.h:36
clang::LangOptions::Sanitize
SanitizerSet Sanitize
Set of enabled sanitizers.
Definition: LangOptions.h:184
clang::CodeGenOptions::SplitFileFission
Definition: CodeGenOptions.h:74
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
clang::CodeGenOptions::SampleProfileFile
std::string SampleProfileFile
Name of the profile file to use with -fprofile-sample-use.
Definition: CodeGenOptions.h:212
clang::DiagnosticsEngine::Report
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1295
clang::ArrayType
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2812
addAddressSanitizerPasses
static void addAddressSanitizerPasses(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:234
getGCOVOptions
static Optional< GCOVOptions > getGCOVOptions(const CodeGenOptions &CodeGenOpts)
Definition: BackendUtil.cpp:498
clang::CodeGenOptions::RewriteMapFiles
std::vector< std::string > RewriteMapFiles
Set of files defining the rules for the symbol rewriting.
Definition: CodeGenOptions.h:264
clang::Backend_EmitNothing
Don&#39;t emit anything (benchmarking mode)
Definition: BackendUtil.h:35
clang::TargetOptions
Options for controlling the target.
Definition: TargetOptions.h:27
clang::CodeGenOptions::SplitDwarfFile
std::string SplitDwarfFile
The name for the split debug info file that we&#39;ll break out.
Definition: CodeGenOptions.h:189
runThinLTOBackend
static void runThinLTOBackend(ModuleSummaryIndex *CombinedIndex, Module *M, const HeaderSearchOptions &HeaderOpts, const CodeGenOptions &CGOpts, const clang::TargetOptions &TOpts, const LangOptions &LOpts, std::unique_ptr< raw_pwrite_stream > OS, std::string SampleProfile, std::string ProfileRemapping, BackendAction Action)
Definition: BackendUtil.cpp:1152
clang::CodeGenOptions::DebugPass
std::string DebugPass
Enable additional debugging information.
Definition: CodeGenOptions.h:142
clang::codegenoptions::NoDebugInfo
Definition: DebugInfoOptions.h:22
clang::MultiVersionKind::Target
clang::CodeGenOptions::SanitizeRecover
SanitizerSet SanitizeRecover
Set of sanitizer checks that are non-fatal (i.e.
Definition: CodeGenOptions.h:268
clang::CodeGenOptions::Embed_Bitcode
Definition: CodeGenOptions.h:109
llvm::Optional
Definition: LLVM.h:38
clang::SanitizerSet::hasOneOf
bool hasOneOf(SanitizerMask K) const
Check if one or more sanitizers are enabled.
Definition: Sanitizers.h:58
clang::Backend_EmitBC
Emit LLVM bitcode files.
Definition: BackendUtil.h:33
clang::HeaderSearchOptions::UserEntries
std::vector< Entry > UserEntries
User specified include entries.
Definition: HeaderSearchOptions.h:102
clang::CodeGenOptions::Embed_Off
Definition: CodeGenOptions.h:107
clang::CodeGenOptions::CmdArgs
std::vector< uint8_t > CmdArgs
List of backend command-line options for -fembed-bitcode.
Definition: CodeGenOptions.h:274
clang::LangOptions
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
clang::CodeGenOptions::CodeModel
std::string CodeModel
The code model to use (-mcmodel).
Definition: CodeGenOptions.h:122
clang::Module
Describes a module or submodule.
Definition: Module.h:65
clang::BackendAction
BackendAction
Definition: BackendUtil.h:31
llvm::Expected
Definition: LLVM.h:39
clang::DiagnosticsEngine
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
addThreadSanitizerPass
static void addThreadSanitizerPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:307
clang::frontend::EmitAssembly
Emit a .s file.
Definition: FrontendOptions.h:56
Diagnostic.h
Defines the Diagnostic-related interfaces.
clang::ComparisonCategoryResult::Less
getCGOptLevel
static CodeGenOpt::Level getCGOptLevel(const CodeGenOptions &CodeGenOpts)
Definition: BackendUtil.cpp:370
setCommandLineOpts
static void setCommandLineOpts(const CodeGenOptions &CodeGenOpts)
Definition: BackendUtil.cpp:707
Utils.h
addSanitizerCoveragePass
static void addSanitizerCoveragePass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:193
llvm::ArrayRef
Definition: LLVM.h:32
FrontendDiagnostic.h
clang::CodeGenOptions::FloatABI
std::string FloatABI
The ABI to use for passing floating point arguments.
Definition: CodeGenOptions.h:158
clang::CodeGenOptions::ThreadModel
std::string ThreadModel
The thread model to use.
Definition: CodeGenOptions.h:195
clang::CodeGenOptions::ProfileFilterFiles
std::string ProfileFilterFiles
Regexes separated by a semi-colon to filter the files to instrument.
Definition: CodeGenOptions.h:133
clang::CodeGenOptions::ProfileRemappingFile
std::string ProfileRemappingFile
Name of the profile remapping file to apply to the profile data supplied by -fprofile-sample-use or -...
Definition: CodeGenOptions.h:219
clang::CodeGenOptions::CoverageVersion
char CoverageVersion[4]
The version string to put into coverage files.
Definition: CodeGenOptions.h:139
addKernelMemorySanitizerPass
static void addKernelMemorySanitizerPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:302
Used
Definition: ObjCUnusedIVarsChecker.cpp:30
clang::CodeGenOptions::LimitFloatPrecision
std::string LimitFloatPrecision
The float precision limit to use, if non-empty.
Definition: CodeGenOptions.h:164
clang::for
for(unsigned I=0, E=TL.getNumArgs();I !=E;++I)
Definition: RecursiveASTVisitor.h:1303
clang::ModuleMap
Definition: ModuleMap.h:75
LangOptions.h
Defines the clang::LangOptions interface.
llvm::MutableArrayRef
Definition: LLVM.h:33
addHWAddressSanitizerPasses
static void addHWAddressSanitizerPasses(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:259
addObjCARCAPElimPass
static void addObjCARCAPElimPass(const PassManagerBuilder &Builder, PassManagerBase &PM)
Definition: BackendUtil.cpp:168
clang::Module::print
void print(raw_ostream &OS, unsigned Indent=0) const
Print the module map for this module to the given stream.
Definition: Module.cpp:405
clang::CodeGenOptions::NoFission
Definition: CodeGenOptions.h:74
clang::CodeGenOptions::SVML
Definition: CodeGenOptions.h:57
createTLII
static TargetLibraryInfoImpl * createTLII(llvm::Triple &TargetTriple, const CodeGenOptions &CodeGenOpts)
Definition: BackendUtil.cpp:333
addKernelHWAddressSanitizerPasses
static void addKernelHWAddressSanitizerPasses(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:268
clang::DiagnosticLevelMask::Error
clang::Backend_EmitObj
Emit native object files.
Definition: BackendUtil.h:37
clang::Backend_EmitAssembly
Emit native assembly files.
Definition: BackendUtil.h:32
clang::TargetOptions::CPU
std::string CPU
If given, the name of the target CPU to generate code for.
Definition: TargetOptions.h:37
BackendUtil.h
clang::TargetOptions::ABI
std::string ABI
If given, the name of the target ABI to use.
Definition: TargetOptions.h:43
addKernelAddressSanitizerPasses
static void addKernelAddressSanitizerPasses(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:250
addSymbolRewriterPass
static void addSymbolRewriterPass(const CodeGenOptions &Opts, legacy::PassManager *MPM)
Definition: BackendUtil.cpp:359
clang::CodeGenOptions::Embed_Marker
Definition: CodeGenOptions.h:110
addDataFlowSanitizerPass
static void addDataFlowSanitizerPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:312
TargetOptions.h
Defines the clang::TargetOptions class.
clang::TargetOptions::Features
std::vector< std::string > Features
The list of target specific features to enable or disable – this should be a list of strings startin...
Definition: TargetOptions.h:56
initTargetOptions
static void initTargetOptions(llvm::TargetOptions &Options, const CodeGenOptions &CodeGenOpts, const clang::TargetOptions &TargetOpts, const LangOptions &LangOpts, const HeaderSearchOptions &HSOpts)
Definition: BackendUtil.cpp:412
llvm::SmallVector
Definition: LLVM.h:36
asanUseGlobalsGC
static bool asanUseGlobalsGC(const Triple &T, const CodeGenOptions &CGOpts)
Definition: BackendUtil.cpp:220
clang::DiagnosticsEngine::getCustomDiagID
unsigned getCustomDiagID(Level L, const char(&FormatString)[N])
Return an ID for a diagnostic with the specified format string and level.
Definition: Diagnostic.h:776
clang::TargetOptions::EABIVersion
llvm::EABI EABIVersion
The EABI version to use.
Definition: TargetOptions.h:46
clang::frontend::Quoted
&#39;#include ""&#39; paths, added by &#39;gcc -iquote&#39;.
Definition: HeaderSearchOptions.h:33
clang::CodeGenOptions::ThinLTOIndexFile
std::string ThinLTOIndexFile
Name of the function summary index file to use for ThinLTO function importing.
Definition: CodeGenOptions.h:223
clang::MultiVersionKind::None
clang::frontend::System
Like Angled, but marks system directories.
Definition: HeaderSearchOptions.h:42
getCodeGenFileType
static TargetMachine::CodeGenFileType getCodeGenFileType(BackendAction Action)
Definition: BackendUtil.cpp:401
clang::EmbedBitcode
void EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts, llvm::MemoryBufferRef Buf)
Definition: BackendUtil.cpp:1361
Type
Optional< types::ID > Type
Definition: InterpolatingCompilationDatabase.cpp:128
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
addGeneralOptsForMemorySanitizer
static void addGeneralOptsForMemorySanitizer(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM, bool CompileKernel)
Definition: BackendUtil.cpp:274
clang::StructuralEquivalenceKind::Default
clang::FrontendTimesIsEnabled
bool FrontendTimesIsEnabled
If the user specifies the -ftime-report argument on an Clang command line then the value of this bool...
Definition: FrontendTiming.cpp:18
clang::LangOptions::FPC_Off
Definition: LangOptions.h:165
CodeGenOptions.h
clang::LangOptions::FPC_Fast
Definition: LangOptions.h:171
clang::CodeGenOptions::RelocationModel
llvm::Reloc::Model RelocationModel
The name of the relocation model to use.
Definition: CodeGenOptions.h:192
clang::CodeGenOptions::hasProfileIRUse
bool hasProfileIRUse() const
Check if IR level profile use is on.
Definition: CodeGenOptions.h:325
clang::EmitBackendOutput
void EmitBackendOutput(DiagnosticsEngine &Diags, const HeaderSearchOptions &, const CodeGenOptions &CGOpts, const TargetOptions &TOpts, const LangOptions &LOpts, const llvm::DataLayout &TDesc, llvm::Module *M, BackendAction Action, std::unique_ptr< raw_pwrite_stream > OS)
clang::CodeGenOptions::hasProfileClangInstr
bool hasProfileClangInstr() const
Check if Clang profile instrumenation is on.
Definition: CodeGenOptions.h:310
clang::FindThinLTOModule
llvm::Expected< llvm::BitcodeModule > FindThinLTOModule(llvm::MemoryBufferRef MBRef)
getSectionNameForBitcode
static const char * getSectionNameForBitcode(const Triple &T)
Definition: BackendUtil.cpp:1333
getSectionNameForCommandline
static const char * getSectionNameForCommandline(const Triple &T)
Definition: BackendUtil.cpp:1346
clang::ento::ObjKind::OS
Indicates that the tracking object is a descendant of a referenced-counted OSObject, used in the Darwin kernel.
clang::CodeGenOptions::ProfileExcludeFiles
std::string ProfileExcludeFiles
Regexes separated by a semi-colon to filter the files to not instrument.
Definition: CodeGenOptions.h:136
clang::DiagnosticsEngine::Error
Definition: Diagnostic.h:157
addBoundsCheckingPass
static void addBoundsCheckingPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:188
addEfficiencySanitizerPass
static void addEfficiencySanitizerPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:320
getCodeModel
static Optional< llvm::CodeModel::Model > getCodeModel(const CodeGenOptions &CodeGenOpts)
Definition: BackendUtil.cpp:386
clang::CodeGenOptions
CodeGenOptions - Track various options which control how the code is optimized and passed to the back...
Definition: CodeGenOptions.h:46
HeaderSearchOptions.h
addObjCARCOptPass
static void addObjCARCOptPass(const PassManagerBuilder &Builder, PassManagerBase &PM)
Definition: BackendUtil.cpp:178
clang::LangOptions::FPC_On
Definition: LangOptions.h:168
clang::CodeGenOptions::hasProfileIRInstr
bool hasProfileIRInstr() const
Check if IR level profile instrumentation is on.
Definition: CodeGenOptions.h:315
clang::CodeGenOptions::getNoBuiltinFuncs
const std::vector< std::string > & getNoBuiltinFuncs() const
Definition: CodeGenOptions.h:305
clang::SanitizerSet::has
bool has(SanitizerMask K) const
Check if a certain (single) sanitizer is enabled.
Definition: Sanitizers.h:52
clang::CodeGenOptions::Accelerate
Definition: CodeGenOptions.h:56
clang::StringLiteral
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1566
addAddDiscriminatorsPass
static void addAddDiscriminatorsPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:183
clang::HeaderSearchOptions
HeaderSearchOptions - Helper class for storing options related to the initialization of the HeaderSea...
Definition: HeaderSearchOptions.h:67
clang::CodeGenOptions::InstrProfileOutput
std::string InstrProfileOutput
Name of the profile file to use as output for -fprofile-instr-generate and -fprofile-generate.
Definition: CodeGenOptions.h:209
clang::CodeGenOptions::OptRecordFile
std::string OptRecordFile
The name of the file to which the backend should save YAML optimization records.
Definition: CodeGenOptions.h:239
clang::CodeGenOptions::ThinLinkBitcodeFile
std::string ThinLinkBitcodeFile
Name of a file that can optionally be written with minimized bitcode to be used as input for the Thin...
Definition: CodeGenOptions.h:228
clang::LangOptions::SanitizerBlacklistFiles
std::vector< std::string > SanitizerBlacklistFiles
Paths to blacklist files specifying which objects (files, functions, variables) should not be instrum...
Definition: LangOptions.h:188
clang::HeaderSearchOptions::Sysroot
std::string Sysroot
If non-empty, the directory to use as a "virtual system root" for include paths.
Definition: HeaderSearchOptions.h:99
addMemorySanitizerPass
static void addMemorySanitizerPass(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)
Definition: BackendUtil.cpp:297
clang::prec::Level
Level
Definition: OperatorPrecedence.h:27
mapToLevel
static PassBuilder::OptimizationLevel mapToLevel(const CodeGenOptions &Opts)
Definition: BackendUtil.cpp:891