Coverage Report

Created: 2021-01-23 06:44

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp
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//===--- CodeGenAction.cpp - LLVM Code Generation Frontend Action ---------===//
2
//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
8
9
#include "clang/CodeGen/CodeGenAction.h"
10
#include "CodeGenModule.h"
11
#include "CoverageMappingGen.h"
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#include "MacroPPCallbacks.h"
13
#include "clang/AST/ASTConsumer.h"
14
#include "clang/AST/ASTContext.h"
15
#include "clang/AST/DeclCXX.h"
16
#include "clang/AST/DeclGroup.h"
17
#include "clang/Basic/DiagnosticFrontend.h"
18
#include "clang/Basic/FileManager.h"
19
#include "clang/Basic/LangStandard.h"
20
#include "clang/Basic/SourceManager.h"
21
#include "clang/Basic/TargetInfo.h"
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#include "clang/CodeGen/BackendUtil.h"
23
#include "clang/CodeGen/ModuleBuilder.h"
24
#include "clang/Driver/DriverDiagnostic.h"
25
#include "clang/Frontend/CompilerInstance.h"
26
#include "clang/Frontend/FrontendDiagnostic.h"
27
#include "clang/Lex/Preprocessor.h"
28
#include "llvm/Bitcode/BitcodeReader.h"
29
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
30
#include "llvm/IR/DebugInfo.h"
31
#include "llvm/IR/DiagnosticInfo.h"
32
#include "llvm/IR/DiagnosticPrinter.h"
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#include "llvm/IR/GlobalValue.h"
34
#include "llvm/IR/LLVMContext.h"
35
#include "llvm/IR/LLVMRemarkStreamer.h"
36
#include "llvm/IR/Module.h"
37
#include "llvm/IRReader/IRReader.h"
38
#include "llvm/LTO/LTOBackend.h"
39
#include "llvm/Linker/Linker.h"
40
#include "llvm/Pass.h"
41
#include "llvm/Support/MemoryBuffer.h"
42
#include "llvm/Support/SourceMgr.h"
43
#include "llvm/Support/TimeProfiler.h"
44
#include "llvm/Support/Timer.h"
45
#include "llvm/Support/ToolOutputFile.h"
46
#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Transforms/IPO/Internalize.h"
48
49
#include <memory>
50
using namespace clang;
51
using namespace llvm;
52
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namespace clang {
54
  class BackendConsumer;
55
  class ClangDiagnosticHandler final : public DiagnosticHandler {
56
  public:
57
    ClangDiagnosticHandler(const CodeGenOptions &CGOpts, BackendConsumer *BCon)
58
17.7k
        : CodeGenOpts(CGOpts), BackendCon(BCon) {}
59
60
    bool handleDiagnostics(const DiagnosticInfo &DI) override;
61
62
5.50M
    bool isAnalysisRemarkEnabled(StringRef PassName) const override {
63
5.50M
      return (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
64
538
              CodeGenOpts.OptimizationRemarkAnalysisPattern->match(PassName));
65
5.50M
    }
66
406k
    bool isMissedOptRemarkEnabled(StringRef PassName) const override {
67
406k
      return (CodeGenOpts.OptimizationRemarkMissedPattern &&
68
81
              CodeGenOpts.OptimizationRemarkMissedPattern->match(PassName));
69
406k
    }
70
368k
    bool isPassedOptRemarkEnabled(StringRef PassName) const override {
71
368k
      return (CodeGenOpts.OptimizationRemarkPattern &&
72
497
              CodeGenOpts.OptimizationRemarkPattern->match(PassName));
73
368k
    }
74
75
447k
    bool isAnyRemarkEnabled() const override {
76
447k
      return (CodeGenOpts.OptimizationRemarkAnalysisPattern ||
77
447k
              CodeGenOpts.OptimizationRemarkMissedPattern ||
78
447k
              CodeGenOpts.OptimizationRemarkPattern);
79
447k
    }
80
81
  private:
82
    const CodeGenOptions &CodeGenOpts;
83
    BackendConsumer *BackendCon;
84
  };
85
86
  static void reportOptRecordError(Error E, DiagnosticsEngine &Diags,
87
2
                                   const CodeGenOptions CodeGenOpts) {
88
2
    handleAllErrors(
89
2
        std::move(E),
90
0
      [&](const LLVMRemarkSetupFileError &E) {
91
0
          Diags.Report(diag::err_cannot_open_file)
92
0
              << CodeGenOpts.OptRecordFile << E.message();
93
0
        },
94
1
      [&](const LLVMRemarkSetupPatternError &E) {
95
1
          Diags.Report(diag::err_drv_optimization_remark_pattern)
96
1
              << E.message() << CodeGenOpts.OptRecordPasses;
97
1
        },
98
1
      [&](const LLVMRemarkSetupFormatError &E) {
99
1
          Diags.Report(diag::err_drv_optimization_remark_format)
100
1
              << CodeGenOpts.OptRecordFormat;
101
1
        });
102
2
    }
103
104
  class BackendConsumer : public ASTConsumer {
105
    using LinkModule = CodeGenAction::LinkModule;
106
107
    virtual void anchor();
108
    DiagnosticsEngine &Diags;
109
    BackendAction Action;
110
    const HeaderSearchOptions &HeaderSearchOpts;
111
    const CodeGenOptions &CodeGenOpts;
112
    const TargetOptions &TargetOpts;
113
    const LangOptions &LangOpts;
114
    std::unique_ptr<raw_pwrite_stream> AsmOutStream;
115
    ASTContext *Context;
116
117
    Timer LLVMIRGeneration;
118
    unsigned LLVMIRGenerationRefCount;
119
120
    /// True if we've finished generating IR. This prevents us from generating
121
    /// additional LLVM IR after emitting output in HandleTranslationUnit. This
122
    /// can happen when Clang plugins trigger additional AST deserialization.
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    bool IRGenFinished = false;
124
125
    bool TimerIsEnabled = false;
126
127
    std::unique_ptr<CodeGenerator> Gen;
128
129
    SmallVector<LinkModule, 4> LinkModules;
130
131
    // This is here so that the diagnostic printer knows the module a diagnostic
132
    // refers to.
133
    llvm::Module *CurLinkModule = nullptr;
134
135
  public:
136
    BackendConsumer(BackendAction Action, DiagnosticsEngine &Diags,
137
                    const HeaderSearchOptions &HeaderSearchOpts,
138
                    const PreprocessorOptions &PPOpts,
139
                    const CodeGenOptions &CodeGenOpts,
140
                    const TargetOptions &TargetOpts,
141
                    const LangOptions &LangOpts, const std::string &InFile,
142
                    SmallVector<LinkModule, 4> LinkModules,
143
                    std::unique_ptr<raw_pwrite_stream> OS, LLVMContext &C,
144
                    CoverageSourceInfo *CoverageInfo = nullptr)
145
        : Diags(Diags), Action(Action), HeaderSearchOpts(HeaderSearchOpts),
146
          CodeGenOpts(CodeGenOpts), TargetOpts(TargetOpts), LangOpts(LangOpts),
147
          AsmOutStream(std::move(OS)), Context(nullptr),
148
          LLVMIRGeneration("irgen", "LLVM IR Generation Time"),
149
          LLVMIRGenerationRefCount(0),
150
          Gen(CreateLLVMCodeGen(Diags, InFile, HeaderSearchOpts, PPOpts,
151
                                CodeGenOpts, C, CoverageInfo)),
152
17.8k
          LinkModules(std::move(LinkModules)) {
153
17.8k
      TimerIsEnabled = CodeGenOpts.TimePasses;
154
17.8k
      llvm::TimePassesIsEnabled = CodeGenOpts.TimePasses;
155
17.8k
      llvm::TimePassesPerRun = CodeGenOpts.TimePassesPerRun;
156
17.8k
    }
157
158
    // This constructor is used in installing an empty BackendConsumer
159
    // to use the clang diagnostic handler for IR input files. It avoids
160
    // initializing the OS field.
161
    BackendConsumer(BackendAction Action, DiagnosticsEngine &Diags,
162
                    const HeaderSearchOptions &HeaderSearchOpts,
163
                    const PreprocessorOptions &PPOpts,
164
                    const CodeGenOptions &CodeGenOpts,
165
                    const TargetOptions &TargetOpts,
166
                    const LangOptions &LangOpts,
167
                    SmallVector<LinkModule, 4> LinkModules, LLVMContext &C,
168
                    CoverageSourceInfo *CoverageInfo = nullptr)
169
        : Diags(Diags), Action(Action), HeaderSearchOpts(HeaderSearchOpts),
170
          CodeGenOpts(CodeGenOpts), TargetOpts(TargetOpts), LangOpts(LangOpts),
171
          Context(nullptr),
172
          LLVMIRGeneration("irgen", "LLVM IR Generation Time"),
173
          LLVMIRGenerationRefCount(0),
174
          Gen(CreateLLVMCodeGen(Diags, "", HeaderSearchOpts, PPOpts,
175
                                CodeGenOpts, C, CoverageInfo)),
176
122
          LinkModules(std::move(LinkModules)) {
177
122
      TimerIsEnabled = CodeGenOpts.TimePasses;
178
122
      llvm::TimePassesIsEnabled = CodeGenOpts.TimePasses;
179
122
      llvm::TimePassesPerRun = CodeGenOpts.TimePassesPerRun;
180
122
    }
181
70.8k
    llvm::Module *getModule() const { return Gen->GetModule(); }
182
17.8k
    std::unique_ptr<llvm::Module> takeModule() {
183
17.8k
      return std::unique_ptr<llvm::Module>(Gen->ReleaseModule());
184
17.8k
    }
185
186
5
    CodeGenerator *getCodeGenerator() { return Gen.get(); }
187
188
536k
    void HandleCXXStaticMemberVarInstantiation(VarDecl *VD) override {
189
536k
      Gen->HandleCXXStaticMemberVarInstantiation(VD);
190
536k
    }
191
192
17.8k
    void Initialize(ASTContext &Ctx) override {
193
17.8k
      assert(!Context && "initialized multiple times");
194
195
17.8k
      Context = &Ctx;
196
197
17.8k
      if (TimerIsEnabled)
198
14
        LLVMIRGeneration.startTimer();
199
200
17.8k
      Gen->Initialize(Ctx);
201
202
17.8k
      if (TimerIsEnabled)
203
14
        LLVMIRGeneration.stopTimer();
204
17.8k
    }
205
206
12.8M
    bool HandleTopLevelDecl(DeclGroupRef D) override {
207
12.8M
      PrettyStackTraceDecl CrashInfo(*D.begin(), SourceLocation(),
208
12.8M
                                     Context->getSourceManager(),
209
12.8M
                                     "LLVM IR generation of declaration");
210
211
      // Recurse.
212
12.8M
      if (TimerIsEnabled) {
213
86
        LLVMIRGenerationRefCount += 1;
214
86
        if (LLVMIRGenerationRefCount == 1)
215
86
          LLVMIRGeneration.startTimer();
216
86
      }
217
218
12.8M
      Gen->HandleTopLevelDecl(D);
219
220
12.8M
      if (TimerIsEnabled) {
221
86
        LLVMIRGenerationRefCount -= 1;
222
86
        if (LLVMIRGenerationRefCount == 0)
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86
          LLVMIRGeneration.stopTimer();
224
86
      }
225
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12.8M
      return true;
227
12.8M
    }
228
229
426k
    void HandleInlineFunctionDefinition(FunctionDecl *D) override {
230
426k
      PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
231
426k
                                     Context->getSourceManager(),
232
426k
                                     "LLVM IR generation of inline function");
233
426k
      if (TimerIsEnabled)
234
0
        LLVMIRGeneration.startTimer();
235
236
426k
      Gen->HandleInlineFunctionDefinition(D);
237
238
426k
      if (TimerIsEnabled)
239
0
        LLVMIRGeneration.stopTimer();
240
426k
    }
241
242
71.9k
    void HandleInterestingDecl(DeclGroupRef D) override {
243
      // Ignore interesting decls from the AST reader after IRGen is finished.
244
71.9k
      if (!IRGenFinished)
245
71.9k
        HandleTopLevelDecl(D);
246
71.9k
    }
247
248
    // Links each entry in LinkModules into our module.  Returns true on error.
249
17.6k
    bool LinkInModules() {
250
13
      for (auto &LM : LinkModules) {
251
13
        if (LM.PropagateAttrs)
252
22
          
for (Function &F : *LM.Module)8
{
253
            // Skip intrinsics. Keep consistent with how intrinsics are created
254
            // in LLVM IR.
255
22
            if (F.isIntrinsic())
256
0
              continue;
257
22
            Gen->CGM().addDefaultFunctionDefinitionAttributes(F);
258
22
          }
259
260
13
        CurLinkModule = LM.Module.get();
261
262
13
        bool Err;
263
13
        if (LM.Internalize) {
264
8
          Err = Linker::linkModules(
265
8
              *getModule(), std::move(LM.Module), LM.LinkFlags,
266
8
              [](llvm::Module &M, const llvm::StringSet<> &GVS) {
267
21
                internalizeModule(M, [&GVS](const llvm::GlobalValue &GV) {
268
21
                  return !GV.hasName() || (GVS.count(GV.getName()) == 0);
269
21
                });
270
8
              });
271
5
        } else {
272
5
          Err = Linker::linkModules(*getModule(), std::move(LM.Module),
273
5
                                    LM.LinkFlags);
274
5
        }
275
276
13
        if (Err)
277
1
          return true;
278
13
      }
279
17.6k
      return false; // success
280
17.6k
    }
281
282
17.8k
    void HandleTranslationUnit(ASTContext &C) override {
283
17.8k
      {
284
17.8k
        llvm::TimeTraceScope TimeScope("Frontend");
285
17.8k
        PrettyStackTraceString CrashInfo("Per-file LLVM IR generation");
286
17.8k
        if (TimerIsEnabled) {
287
14
          LLVMIRGenerationRefCount += 1;
288
14
          if (LLVMIRGenerationRefCount == 1)
289
14
            LLVMIRGeneration.startTimer();
290
14
        }
291
292
17.8k
        Gen->HandleTranslationUnit(C);
293
294
17.8k
        if (TimerIsEnabled) {
295
14
          LLVMIRGenerationRefCount -= 1;
296
14
          if (LLVMIRGenerationRefCount == 0)
297
14
            LLVMIRGeneration.stopTimer();
298
14
        }
299
300
17.8k
        IRGenFinished = true;
301
17.8k
      }
302
303
      // Silently ignore if we weren't initialized for some reason.
304
17.8k
      if (!getModule())
305
199
        return;
306
307
      // Install an inline asm handler so that diagnostics get printed through
308
      // our diagnostics hooks.
309
17.6k
      LLVMContext &Ctx = getModule()->getContext();
310
17.6k
      LLVMContext::InlineAsmDiagHandlerTy OldHandler =
311
17.6k
        Ctx.getInlineAsmDiagnosticHandler();
312
17.6k
      void *OldContext = Ctx.getInlineAsmDiagnosticContext();
313
17.6k
      Ctx.setInlineAsmDiagnosticHandler(InlineAsmDiagHandler, this);
314
315
17.6k
      std::unique_ptr<DiagnosticHandler> OldDiagnosticHandler =
316
17.6k
          Ctx.getDiagnosticHandler();
317
17.6k
      Ctx.setDiagnosticHandler(std::make_unique<ClangDiagnosticHandler>(
318
17.6k
        CodeGenOpts, this));
319
320
17.6k
      Expected<std::unique_ptr<llvm::ToolOutputFile>> OptRecordFileOrErr =
321
17.6k
          setupLLVMOptimizationRemarks(
322
17.6k
              Ctx, CodeGenOpts.OptRecordFile, CodeGenOpts.OptRecordPasses,
323
17.6k
              CodeGenOpts.OptRecordFormat, CodeGenOpts.DiagnosticsWithHotness,
324
17.6k
              CodeGenOpts.DiagnosticsHotnessThreshold);
325
326
17.6k
      if (Error E = OptRecordFileOrErr.takeError()) {
327
2
        reportOptRecordError(std::move(E), Diags, CodeGenOpts);
328
2
        return;
329
2
      }
330
331
17.6k
      std::unique_ptr<llvm::ToolOutputFile> OptRecordFile =
332
17.6k
          std::move(*OptRecordFileOrErr);
333
334
17.6k
      if (OptRecordFile &&
335
7
          CodeGenOpts.getProfileUse() != CodeGenOptions::ProfileNone)
336
1
        Ctx.setDiagnosticsHotnessRequested(true);
337
338
      // Link each LinkModule into our module.
339
17.6k
      if (LinkInModules())
340
1
        return;
341
342
17.6k
      EmbedBitcode(getModule(), CodeGenOpts, llvm::MemoryBufferRef());
343
344
17.6k
      EmitBackendOutput(Diags, HeaderSearchOpts, CodeGenOpts, TargetOpts,
345
17.6k
                        LangOpts, C.getTargetInfo().getDataLayout(),
346
17.6k
                        getModule(), Action, std::move(AsmOutStream));
347
348
17.6k
      Ctx.setInlineAsmDiagnosticHandler(OldHandler, OldContext);
349
350
17.6k
      Ctx.setDiagnosticHandler(std::move(OldDiagnosticHandler));
351
352
17.6k
      if (OptRecordFile)
353
7
        OptRecordFile->keep();
354
17.6k
    }
355
356
2.19M
    void HandleTagDeclDefinition(TagDecl *D) override {
357
2.19M
      PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
358
2.19M
                                     Context->getSourceManager(),
359
2.19M
                                     "LLVM IR generation of declaration");
360
2.19M
      Gen->HandleTagDeclDefinition(D);
361
2.19M
    }
362
363
990k
    void HandleTagDeclRequiredDefinition(const TagDecl *D) override {
364
990k
      Gen->HandleTagDeclRequiredDefinition(D);
365
990k
    }
366
367
4.65k
    void CompleteTentativeDefinition(VarDecl *D) override {
368
4.65k
      Gen->CompleteTentativeDefinition(D);
369
4.65k
    }
370
371
7
    void CompleteExternalDeclaration(VarDecl *D) override {
372
7
      Gen->CompleteExternalDeclaration(D);
373
7
    }
374
375
494
    void AssignInheritanceModel(CXXRecordDecl *RD) override {
376
494
      Gen->AssignInheritanceModel(RD);
377
494
    }
378
379
779
    void HandleVTable(CXXRecordDecl *RD) override {
380
779
      Gen->HandleVTable(RD);
381
779
    }
382
383
    static void InlineAsmDiagHandler(const llvm::SMDiagnostic &SM,void *Context,
384
9
                                     unsigned LocCookie) {
385
9
      SourceLocation Loc = SourceLocation::getFromRawEncoding(LocCookie);
386
9
      ((BackendConsumer*)Context)->InlineAsmDiagHandler2(SM, Loc);
387
9
    }
388
389
    /// Get the best possible source location to represent a diagnostic that
390
    /// may have associated debug info.
391
    const FullSourceLoc
392
    getBestLocationFromDebugLoc(const llvm::DiagnosticInfoWithLocationBase &D,
393
                                bool &BadDebugInfo, StringRef &Filename,
394
                                unsigned &Line, unsigned &Column) const;
395
396
    void InlineAsmDiagHandler2(const llvm::SMDiagnostic &,
397
                               SourceLocation LocCookie);
398
399
    void DiagnosticHandlerImpl(const llvm::DiagnosticInfo &DI);
400
    /// Specialized handler for InlineAsm diagnostic.
401
    /// \return True if the diagnostic has been successfully reported, false
402
    /// otherwise.
403
    bool InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D);
404
    /// Specialized handler for StackSize diagnostic.
405
    /// \return True if the diagnostic has been successfully reported, false
406
    /// otherwise.
407
    bool StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D);
408
    /// Specialized handler for unsupported backend feature diagnostic.
409
    void UnsupportedDiagHandler(const llvm::DiagnosticInfoUnsupported &D);
410
    /// Specialized handlers for optimization remarks.
411
    /// Note that these handlers only accept remarks and they always handle
412
    /// them.
413
    void EmitOptimizationMessage(const llvm::DiagnosticInfoOptimizationBase &D,
414
                                 unsigned DiagID);
415
    void
416
    OptimizationRemarkHandler(const llvm::DiagnosticInfoOptimizationBase &D);
417
    void OptimizationRemarkHandler(
418
        const llvm::OptimizationRemarkAnalysisFPCommute &D);
419
    void OptimizationRemarkHandler(
420
        const llvm::OptimizationRemarkAnalysisAliasing &D);
421
    void OptimizationFailureHandler(
422
        const llvm::DiagnosticInfoOptimizationFailure &D);
423
  };
424
425
0
  void BackendConsumer::anchor() {}
426
}
427
428
136k
bool ClangDiagnosticHandler::handleDiagnostics(const DiagnosticInfo &DI) {
429
136k
  BackendCon->DiagnosticHandlerImpl(DI);
430
136k
  return true;
431
136k
}
432
433
/// ConvertBackendLocation - Convert a location in a temporary llvm::SourceMgr
434
/// buffer to be a valid FullSourceLoc.
435
static FullSourceLoc ConvertBackendLocation(const llvm::SMDiagnostic &D,
436
9
                                            SourceManager &CSM) {
437
  // Get both the clang and llvm source managers.  The location is relative to
438
  // a memory buffer that the LLVM Source Manager is handling, we need to add
439
  // a copy to the Clang source manager.
440
9
  const llvm::SourceMgr &LSM = *D.getSourceMgr();
441
442
  // We need to copy the underlying LLVM memory buffer because llvm::SourceMgr
443
  // already owns its one and clang::SourceManager wants to own its one.
444
9
  const MemoryBuffer *LBuf =
445
9
  LSM.getMemoryBuffer(LSM.FindBufferContainingLoc(D.getLoc()));
446
447
  // Create the copy and transfer ownership to clang::SourceManager.
448
  // TODO: Avoid copying files into memory.
449
9
  std::unique_ptr<llvm::MemoryBuffer> CBuf =
450
9
      llvm::MemoryBuffer::getMemBufferCopy(LBuf->getBuffer(),
451
9
                                           LBuf->getBufferIdentifier());
452
  // FIXME: Keep a file ID map instead of creating new IDs for each location.
453
9
  FileID FID = CSM.createFileID(std::move(CBuf));
454
455
  // Translate the offset into the file.
456
9
  unsigned Offset = D.getLoc().getPointer() - LBuf->getBufferStart();
457
9
  SourceLocation NewLoc =
458
9
  CSM.getLocForStartOfFile(FID).getLocWithOffset(Offset);
459
9
  return FullSourceLoc(NewLoc, CSM);
460
9
}
461
462
463
/// InlineAsmDiagHandler2 - This function is invoked when the backend hits an
464
/// error parsing inline asm.  The SMDiagnostic indicates the error relative to
465
/// the temporary memory buffer that the inline asm parser has set up.
466
void BackendConsumer::InlineAsmDiagHandler2(const llvm::SMDiagnostic &D,
467
9
                                            SourceLocation LocCookie) {
468
  // There are a couple of different kinds of errors we could get here.  First,
469
  // we re-format the SMDiagnostic in terms of a clang diagnostic.
470
471
  // Strip "error: " off the start of the message string.
472
9
  StringRef Message = D.getMessage();
473
9
  if (Message.startswith("error: "))
474
0
    Message = Message.substr(7);
475
476
  // If the SMDiagnostic has an inline asm source location, translate it.
477
9
  FullSourceLoc Loc;
478
9
  if (D.getLoc() != SMLoc())
479
9
    Loc = ConvertBackendLocation(D, Context->getSourceManager());
480
481
9
  unsigned DiagID;
482
9
  switch (D.getKind()) {
483
4
  case llvm::SourceMgr::DK_Error:
484
4
    DiagID = diag::err_fe_inline_asm;
485
4
    break;
486
5
  case llvm::SourceMgr::DK_Warning:
487
5
    DiagID = diag::warn_fe_inline_asm;
488
5
    break;
489
0
  case llvm::SourceMgr::DK_Note:
490
0
    DiagID = diag::note_fe_inline_asm;
491
0
    break;
492
0
  case llvm::SourceMgr::DK_Remark:
493
0
    llvm_unreachable("remarks unexpected");
494
9
  }
495
  // If this problem has clang-level source location information, report the
496
  // issue in the source with a note showing the instantiated
497
  // code.
498
9
  if (LocCookie.isValid()) {
499
8
    Diags.Report(LocCookie, DiagID).AddString(Message);
500
501
8
    if (D.getLoc().isValid()) {
502
8
      DiagnosticBuilder B = Diags.Report(Loc, diag::note_fe_inline_asm_here);
503
      // Convert the SMDiagnostic ranges into SourceRange and attach them
504
      // to the diagnostic.
505
1
      for (const std::pair<unsigned, unsigned> &Range : D.getRanges()) {
506
1
        unsigned Column = D.getColumnNo();
507
1
        B << SourceRange(Loc.getLocWithOffset(Range.first - Column),
508
1
                         Loc.getLocWithOffset(Range.second - Column));
509
1
      }
510
8
    }
511
8
    return;
512
8
  }
513
514
  // Otherwise, report the backend issue as occurring in the generated .s file.
515
  // If Loc is invalid, we still need to report the issue, it just gets no
516
  // location info.
517
1
  Diags.Report(Loc, DiagID).AddString(Message);
518
1
}
519
520
#define ComputeDiagID(Severity, GroupName, DiagID)                             \
521
19
  do {                                                                         \
522
18
    switch (Severity) {                                                        \
523
17
    case llvm::DS_Error:                                                       \
524
17
      DiagID = diag::err_fe_##GroupName;                                       \
525
17
      break;                                                                   \
526
1
    case llvm::DS_Warning:                                                     \
527
1
      DiagID = diag::warn_fe_##GroupName;                                      \
528
1
      break;                                                                   \
529
0
    case llvm::DS_Remark:                                                      \
530
0
      llvm_unreachable("'remark' severity not expected");                      \
531
0
      break;                                                                   \
532
0
    case llvm::DS_Note:                                                        \
533
0
      DiagID = diag::note_fe_##GroupName;                                      \
534
0
      break;                                                                   \
535
18
    }                                                                          \
536
18
  } while (false)
537
538
#define ComputeDiagRemarkID(Severity, GroupName, DiagID)                       \
539
4
  do {                                                                         \
540
4
    switch (Severity) {                                                        \
541
4
    case llvm::DS_Error:                                                       \
542
4
      DiagID = diag::err_fe_##GroupName;                                       \
543
4
      break;                                                                   \
544
0
    case llvm::DS_Warning:                                                     \
545
0
      DiagID = diag::warn_fe_##GroupName;                                      \
546
0
      break;                                                                   \
547
0
    case llvm::DS_Remark:                                                      \
548
0
      DiagID = diag::remark_fe_##GroupName;                                    \
549
0
      break;                                                                   \
550
0
    case llvm::DS_Note:                                                        \
551
0
      DiagID = diag::note_fe_##GroupName;                                      \
552
0
      break;                                                                   \
553
4
    }                                                                          \
554
4
  } while (false)
555
556
bool
557
17
BackendConsumer::InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D) {
558
17
  unsigned DiagID;
559
17
  ComputeDiagID(D.getSeverity(), inline_asm, DiagID);
560
17
  std::string Message = D.getMsgStr().str();
561
562
  // If this problem has clang-level source location information, report the
563
  // issue as being a problem in the source with a note showing the instantiated
564
  // code.
565
17
  SourceLocation LocCookie =
566
17
      SourceLocation::getFromRawEncoding(D.getLocCookie());
567
17
  if (LocCookie.isValid())
568
17
    Diags.Report(LocCookie, DiagID).AddString(Message);
569
0
  else {
570
    // Otherwise, report the backend diagnostic as occurring in the generated
571
    // .s file.
572
    // If Loc is invalid, we still need to report the diagnostic, it just gets
573
    // no location info.
574
0
    FullSourceLoc Loc;
575
0
    Diags.Report(Loc, DiagID).AddString(Message);
576
0
  }
577
  // We handled all the possible severities.
578
17
  return true;
579
17
}
580
581
bool
582
18
BackendConsumer::StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D) {
583
18
  if (D.getSeverity() != llvm::DS_Warning)
584
    // For now, the only support we have for StackSize diagnostic is warning.
585
    // We do not know how to format other severities.
586
0
    return false;
587
588
18
  if (const Decl *ND = Gen->GetDeclForMangledName(D.getFunction().getName())) {
589
    // FIXME: Shouldn't need to truncate to uint32_t
590
17
    Diags.Report(ND->getASTContext().getFullLoc(ND->getLocation()),
591
17
                 diag::warn_fe_frame_larger_than)
592
17
      << static_cast<uint32_t>(D.getStackSize()) << Decl::castToDeclContext(ND);
593
17
    return true;
594
17
  }
595
596
1
  return false;
597
1
}
598
599
const FullSourceLoc BackendConsumer::getBestLocationFromDebugLoc(
600
    const llvm::DiagnosticInfoWithLocationBase &D, bool &BadDebugInfo,
601
146
    StringRef &Filename, unsigned &Line, unsigned &Column) const {
602
146
  SourceManager &SourceMgr = Context->getSourceManager();
603
146
  FileManager &FileMgr = SourceMgr.getFileManager();
604
146
  SourceLocation DILoc;
605
606
146
  if (D.isLocationAvailable()) {
607
118
    D.getLocation(Filename, Line, Column);
608
118
    if (Line > 0) {
609
118
      auto FE = FileMgr.getFile(Filename);
610
118
      if (!FE)
611
118
        FE = FileMgr.getFile(D.getAbsolutePath());
612
118
      if (FE) {
613
        // If -gcolumn-info was not used, Column will be 0. This upsets the
614
        // source manager, so pass 1 if Column is not set.
615
66
        DILoc = SourceMgr.translateFileLineCol(*FE, Line, Column ? 
Column50
: 1);
616
116
      }
617
118
    }
618
118
    BadDebugInfo = DILoc.isInvalid();
619
118
  }
620
621
  // If a location isn't available, try to approximate it using the associated
622
  // function definition. We use the definition's right brace to differentiate
623
  // from diagnostics that genuinely relate to the function itself.
624
146
  FullSourceLoc Loc(DILoc, SourceMgr);
625
146
  if (Loc.isInvalid())
626
30
    if (const Decl *FD = Gen->GetDeclForMangledName(D.getFunction().getName()))
627
14
      Loc = FD->getASTContext().getFullLoc(FD->getLocation());
628
629
146
  if (DILoc.isInvalid() && 
D.isLocationAvailable()30
)
630
    // If we were not able to translate the file:line:col information
631
    // back to a SourceLocation, at least emit a note stating that
632
    // we could not translate this location. This can happen in the
633
    // case of #line directives.
634
2
    Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
635
2
        << Filename << Line << Column;
636
637
146
  return Loc;
638
146
}
639
640
void BackendConsumer::UnsupportedDiagHandler(
641
9
    const llvm::DiagnosticInfoUnsupported &D) {
642
  // We only support warnings or errors.
643
9
  assert(D.getSeverity() == llvm::DS_Error ||
644
9
         D.getSeverity() == llvm::DS_Warning);
645
646
9
  StringRef Filename;
647
9
  unsigned Line, Column;
648
9
  bool BadDebugInfo = false;
649
9
  FullSourceLoc Loc;
650
9
  std::string Msg;
651
9
  raw_string_ostream MsgStream(Msg);
652
653
  // Context will be nullptr for IR input files, we will construct the diag
654
  // message from llvm::DiagnosticInfoUnsupported.
655
9
  if (Context != nullptr) {
656
6
    Loc = getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
657
6
    MsgStream << D.getMessage();
658
3
  } else {
659
3
    DiagnosticPrinterRawOStream DP(MsgStream);
660
3
    D.print(DP);
661
3
  }
662
663
9
  auto DiagType = D.getSeverity() == llvm::DS_Error
664
8
                      ? diag::err_fe_backend_unsupported
665
1
                      : diag::warn_fe_backend_unsupported;
666
9
  Diags.Report(Loc, DiagType) << MsgStream.str();
667
668
9
  if (BadDebugInfo)
669
    // If we were not able to translate the file:line:col information
670
    // back to a SourceLocation, at least emit a note stating that
671
    // we could not translate this location. This can happen in the
672
    // case of #line directives.
673
0
    Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
674
0
        << Filename << Line << Column;
675
9
}
676
677
void BackendConsumer::EmitOptimizationMessage(
678
150
    const llvm::DiagnosticInfoOptimizationBase &D, unsigned DiagID) {
679
  // We only support warnings and remarks.
680
150
  assert(D.getSeverity() == llvm::DS_Remark ||
681
150
         D.getSeverity() == llvm::DS_Warning);
682
683
150
  StringRef Filename;
684
150
  unsigned Line, Column;
685
150
  bool BadDebugInfo = false;
686
150
  FullSourceLoc Loc;
687
150
  std::string Msg;
688
150
  raw_string_ostream MsgStream(Msg);
689
690
  // Context will be nullptr for IR input files, we will construct the remark
691
  // message from llvm::DiagnosticInfoOptimizationBase.
692
150
  if (Context != nullptr) {
693
140
    Loc = getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
694
140
    MsgStream << D.getMsg();
695
10
  } else {
696
10
    DiagnosticPrinterRawOStream DP(MsgStream);
697
10
    D.print(DP);
698
10
  }
699
700
150
  if (D.getHotness())
701
20
    MsgStream << " (hotness: " << *D.getHotness() << ")";
702
703
150
  Diags.Report(Loc, DiagID)
704
150
      << AddFlagValue(D.getPassName())
705
150
      << MsgStream.str();
706
707
150
  if (BadDebugInfo)
708
    // If we were not able to translate the file:line:col information
709
    // back to a SourceLocation, at least emit a note stating that
710
    // we could not translate this location. This can happen in the
711
    // case of #line directives.
712
2
    Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
713
2
        << Filename << Line << Column;
714
150
}
715
716
void BackendConsumer::OptimizationRemarkHandler(
717
136k
    const llvm::DiagnosticInfoOptimizationBase &D) {
718
  // Without hotness information, don't show noisy remarks.
719
136k
  if (D.isVerbose() && 
!D.getHotness()441
)
720
440
    return;
721
722
136k
  if (D.isPassed()) {
723
    // Optimization remarks are active only if the -Rpass flag has a regular
724
    // expression that matches the name of the pass name in \p D.
725
492
    if (CodeGenOpts.OptimizationRemarkPattern &&
726
375
        CodeGenOpts.OptimizationRemarkPattern->match(D.getPassName()))
727
119
      EmitOptimizationMessage(D, diag::remark_fe_backend_optimization_remark);
728
135k
  } else if (D.isMissed()) {
729
    // Missed optimization remarks are active only if the -Rpass-missed
730
    // flag has a regular expression that matches the name of the pass
731
    // name in \p D.
732
46.1k
    if (CodeGenOpts.OptimizationRemarkMissedPattern &&
733
21
        CodeGenOpts.OptimizationRemarkMissedPattern->match(D.getPassName()))
734
13
      EmitOptimizationMessage(
735
13
          D, diag::remark_fe_backend_optimization_remark_missed);
736
89.6k
  } else {
737
89.6k
    assert(D.isAnalysis() && "Unknown remark type");
738
739
89.6k
    bool ShouldAlwaysPrint = false;
740
89.6k
    if (auto *ORA = dyn_cast<llvm::OptimizationRemarkAnalysis>(&D))
741
23
      ShouldAlwaysPrint = ORA->shouldAlwaysPrint();
742
743
89.6k
    if (ShouldAlwaysPrint ||
744
89.6k
        (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
745
16
         CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
746
12
      EmitOptimizationMessage(
747
12
          D, diag::remark_fe_backend_optimization_remark_analysis);
748
89.6k
  }
749
136k
}
750
751
void BackendConsumer::OptimizationRemarkHandler(
752
1
    const llvm::OptimizationRemarkAnalysisFPCommute &D) {
753
  // Optimization analysis remarks are active if the pass name is set to
754
  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
755
  // regular expression that matches the name of the pass name in \p D.
756
757
1
  if (D.shouldAlwaysPrint() ||
758
1
      (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
759
1
       CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
760
1
    EmitOptimizationMessage(
761
1
        D, diag::remark_fe_backend_optimization_remark_analysis_fpcommute);
762
1
}
763
764
void BackendConsumer::OptimizationRemarkHandler(
765
1
    const llvm::OptimizationRemarkAnalysisAliasing &D) {
766
  // Optimization analysis remarks are active if the pass name is set to
767
  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
768
  // regular expression that matches the name of the pass name in \p D.
769
770
1
  if (D.shouldAlwaysPrint() ||
771
1
      (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
772
1
       CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
773
1
    EmitOptimizationMessage(
774
1
        D, diag::remark_fe_backend_optimization_remark_analysis_aliasing);
775
1
}
776
777
void BackendConsumer::OptimizationFailureHandler(
778
4
    const llvm::DiagnosticInfoOptimizationFailure &D) {
779
4
  EmitOptimizationMessage(D, diag::warn_fe_backend_optimization_failure);
780
4
}
781
782
/// This function is invoked when the backend needs
783
/// to report something to the user.
784
136k
void BackendConsumer::DiagnosticHandlerImpl(const DiagnosticInfo &DI) {
785
136k
  unsigned DiagID = diag::err_fe_inline_asm;
786
136k
  llvm::DiagnosticSeverity Severity = DI.getSeverity();
787
  // Get the diagnostic ID based.
788
136k
  switch (DI.getKind()) {
789
17
  case llvm::DK_InlineAsm:
790
17
    if (InlineAsmDiagHandler(cast<DiagnosticInfoInlineAsm>(DI)))
791
17
      return;
792
0
    ComputeDiagID(Severity, inline_asm, DiagID);
793
0
    break;
794
18
  case llvm::DK_StackSize:
795
18
    if (StackSizeDiagHandler(cast<DiagnosticInfoStackSize>(DI)))
796
17
      return;
797
1
    ComputeDiagID(Severity, backend_frame_larger_than, DiagID);
798
1
    break;
799
1
  case DK_Linker:
800
1
    assert(CurLinkModule);
801
    // FIXME: stop eating the warnings and notes.
802
1
    if (Severity != DS_Error)
803
0
      return;
804
1
    DiagID = diag::err_fe_cannot_link_module;
805
1
    break;
806
492
  case llvm::DK_OptimizationRemark:
807
    // Optimization remarks are always handled completely by this
808
    // handler. There is no generic way of emitting them.
809
492
    OptimizationRemarkHandler(cast<OptimizationRemark>(DI));
810
492
    return;
811
46.5k
  case llvm::DK_OptimizationRemarkMissed:
812
    // Optimization remarks are always handled completely by this
813
    // handler. There is no generic way of emitting them.
814
46.5k
    OptimizationRemarkHandler(cast<OptimizationRemarkMissed>(DI));
815
46.5k
    return;
816
23
  case llvm::DK_OptimizationRemarkAnalysis:
817
    // Optimization remarks are always handled completely by this
818
    // handler. There is no generic way of emitting them.
819
23
    OptimizationRemarkHandler(cast<OptimizationRemarkAnalysis>(DI));
820
23
    return;
821
1
  case llvm::DK_OptimizationRemarkAnalysisFPCommute:
822
    // Optimization remarks are always handled completely by this
823
    // handler. There is no generic way of emitting them.
824
1
    OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisFPCommute>(DI));
825
1
    return;
826
1
  case llvm::DK_OptimizationRemarkAnalysisAliasing:
827
    // Optimization remarks are always handled completely by this
828
    // handler. There is no generic way of emitting them.
829
1
    OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisAliasing>(DI));
830
1
    return;
831
0
  case llvm::DK_MachineOptimizationRemark:
832
    // Optimization remarks are always handled completely by this
833
    // handler. There is no generic way of emitting them.
834
0
    OptimizationRemarkHandler(cast<MachineOptimizationRemark>(DI));
835
0
    return;
836
16
  case llvm::DK_MachineOptimizationRemarkMissed:
837
    // Optimization remarks are always handled completely by this
838
    // handler. There is no generic way of emitting them.
839
16
    OptimizationRemarkHandler(cast<MachineOptimizationRemarkMissed>(DI));
840
16
    return;
841
89.6k
  case llvm::DK_MachineOptimizationRemarkAnalysis:
842
    // Optimization remarks are always handled completely by this
843
    // handler. There is no generic way of emitting them.
844
89.6k
    OptimizationRemarkHandler(cast<MachineOptimizationRemarkAnalysis>(DI));
845
89.6k
    return;
846
4
  case llvm::DK_OptimizationFailure:
847
    // Optimization failures are always handled completely by this
848
    // handler.
849
4
    OptimizationFailureHandler(cast<DiagnosticInfoOptimizationFailure>(DI));
850
4
    return;
851
9
  case llvm::DK_Unsupported:
852
9
    UnsupportedDiagHandler(cast<DiagnosticInfoUnsupported>(DI));
853
9
    return;
854
4
  default:
855
    // Plugin IDs are not bound to any value as they are set dynamically.
856
4
    ComputeDiagRemarkID(Severity, backend_plugin, DiagID);
857
4
    break;
858
6
  }
859
6
  std::string MsgStorage;
860
6
  {
861
6
    raw_string_ostream Stream(MsgStorage);
862
6
    DiagnosticPrinterRawOStream DP(Stream);
863
6
    DI.print(DP);
864
6
  }
865
866
6
  if (DiagID == diag::err_fe_cannot_link_module) {
867
1
    Diags.Report(diag::err_fe_cannot_link_module)
868
1
        << CurLinkModule->getModuleIdentifier() << MsgStorage;
869
1
    return;
870
1
  }
871
872
  // Report the backend message using the usual diagnostic mechanism.
873
5
  FullSourceLoc Loc;
874
5
  Diags.Report(Loc, DiagID).AddString(MsgStorage);
875
5
}
876
#undef ComputeDiagID
877
878
CodeGenAction::CodeGenAction(unsigned _Act, LLVMContext *_VMContext)
879
    : Act(_Act), VMContext(_VMContext ? _VMContext : new LLVMContext),
880
18.0k
      OwnsVMContext(!_VMContext) {}
881
882
14.0k
CodeGenAction::~CodeGenAction() {
883
14.0k
  TheModule.reset();
884
14.0k
  if (OwnsVMContext)
885
14.0k
    delete VMContext;
886
14.0k
}
887
888
123
bool CodeGenAction::hasIRSupport() const { return true; }
889
890
17.9k
void CodeGenAction::EndSourceFileAction() {
891
  // If the consumer creation failed, do nothing.
892
17.9k
  if (!getCompilerInstance().hasASTConsumer())
893
123
    return;
894
895
  // Steal the module from the consumer.
896
17.8k
  TheModule = BEConsumer->takeModule();
897
17.8k
}
898
899
0
std::unique_ptr<llvm::Module> CodeGenAction::takeModule() {
900
0
  return std::move(TheModule);
901
0
}
902
903
0
llvm::LLVMContext *CodeGenAction::takeLLVMContext() {
904
0
  OwnsVMContext = false;
905
0
  return VMContext;
906
0
}
907
908
static std::unique_ptr<raw_pwrite_stream>
909
17.9k
GetOutputStream(CompilerInstance &CI, StringRef InFile, BackendAction Action) {
910
17.9k
  switch (Action) {
911
578
  case Backend_EmitAssembly:
912
578
    return CI.createDefaultOutputFile(false, InFile, "s");
913
13.1k
  case Backend_EmitLL:
914
13.1k
    return CI.createDefaultOutputFile(false, InFile, "ll");
915
570
  case Backend_EmitBC:
916
570
    return CI.createDefaultOutputFile(true, InFile, "bc");
917
243
  case Backend_EmitNothing:
918
243
    return nullptr;
919
4
  case Backend_EmitMCNull:
920
4
    return CI.createNullOutputFile();
921
3.41k
  case Backend_EmitObj:
922
3.41k
    return CI.createDefaultOutputFile(true, InFile, "o");
923
0
  }
924
925
0
  llvm_unreachable("Invalid action!");
926
0
}
927
928
std::unique_ptr<ASTConsumer>
929
17.8k
CodeGenAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
930
17.8k
  BackendAction BA = static_cast<BackendAction>(Act);
931
17.8k
  std::unique_ptr<raw_pwrite_stream> OS = CI.takeOutputStream();
932
17.8k
  if (!OS)
933
17.8k
    OS = GetOutputStream(CI, InFile, BA);
934
935
17.8k
  if (BA != Backend_EmitNothing && 
!OS17.6k
)
936
2
    return nullptr;
937
938
  // Load bitcode modules to link with, if we need to.
939
17.8k
  if (LinkModules.empty())
940
17.8k
    for (const CodeGenOptions::BitcodeFileToLink &F :
941
14
         CI.getCodeGenOpts().LinkBitcodeFiles) {
942
14
      auto BCBuf = CI.getFileManager().getBufferForFile(F.Filename);
943
14
      if (!BCBuf) {
944
1
        CI.getDiagnostics().Report(diag::err_cannot_open_file)
945
1
            << F.Filename << BCBuf.getError().message();
946
1
        LinkModules.clear();
947
1
        return nullptr;
948
1
      }
949
950
13
      Expected<std::unique_ptr<llvm::Module>> ModuleOrErr =
951
13
          getOwningLazyBitcodeModule(std::move(*BCBuf), *VMContext);
952
13
      if (!ModuleOrErr) {
953
0
        handleAllErrors(ModuleOrErr.takeError(), [&](ErrorInfoBase &EIB) {
954
0
          CI.getDiagnostics().Report(diag::err_cannot_open_file)
955
0
              << F.Filename << EIB.message();
956
0
        });
957
0
        LinkModules.clear();
958
0
        return nullptr;
959
0
      }
960
13
      LinkModules.push_back({std::move(ModuleOrErr.get()), F.PropagateAttrs,
961
13
                             F.Internalize, F.LinkFlags});
962
13
    }
963
964
17.8k
  CoverageSourceInfo *CoverageInfo = nullptr;
965
  // Add the preprocessor callback only when the coverage mapping is generated.
966
17.8k
  if (CI.getCodeGenOpts().CoverageMapping)
967
69
    CoverageInfo = CodeGen::CoverageMappingModuleGen::setUpCoverageCallbacks(
968
69
        CI.getPreprocessor());
969
970
17.8k
  std::unique_ptr<BackendConsumer> Result(new BackendConsumer(
971
17.8k
      BA, CI.getDiagnostics(), CI.getHeaderSearchOpts(),
972
17.8k
      CI.getPreprocessorOpts(), CI.getCodeGenOpts(), CI.getTargetOpts(),
973
17.8k
      CI.getLangOpts(), std::string(InFile), std::move(LinkModules),
974
17.8k
      std::move(OS), *VMContext, CoverageInfo));
975
17.8k
  BEConsumer = Result.get();
976
977
  // Enable generating macro debug info only when debug info is not disabled and
978
  // also macro debug info is enabled.
979
17.8k
  if (CI.getCodeGenOpts().getDebugInfo() != codegenoptions::NoDebugInfo &&
980
3.89k
      CI.getCodeGenOpts().MacroDebugInfo) {
981
5
    std::unique_ptr<PPCallbacks> Callbacks =
982
5
        std::make_unique<MacroPPCallbacks>(BEConsumer->getCodeGenerator(),
983
5
                                            CI.getPreprocessor());
984
5
    CI.getPreprocessor().addPPCallbacks(std::move(Callbacks));
985
5
  }
986
987
17.8k
  return std::move(Result);
988
17.8k
}
989
990
static void BitcodeInlineAsmDiagHandler(const llvm::SMDiagnostic &SM,
991
                                         void *Context,
992
1
                                         unsigned LocCookie) {
993
1
  SM.print(nullptr, llvm::errs());
994
995
1
  auto Diags = static_cast<DiagnosticsEngine *>(Context);
996
1
  unsigned DiagID;
997
1
  switch (SM.getKind()) {
998
1
  case llvm::SourceMgr::DK_Error:
999
1
    DiagID = diag::err_fe_inline_asm;
1000
1
    break;
1001
0
  case llvm::SourceMgr::DK_Warning:
1002
0
    DiagID = diag::warn_fe_inline_asm;
1003
0
    break;
1004
0
  case llvm::SourceMgr::DK_Note:
1005
0
    DiagID = diag::note_fe_inline_asm;
1006
0
    break;
1007
0
  case llvm::SourceMgr::DK_Remark:
1008
0
    llvm_unreachable("remarks unexpected");
1009
1
  }
1010
1011
1
  Diags->Report(DiagID).AddString("cannot compile inline asm");
1012
1
}
1013
1014
std::unique_ptr<llvm::Module>
1015
123
CodeGenAction::loadModule(MemoryBufferRef MBRef) {
1016
123
  CompilerInstance &CI = getCompilerInstance();
1017
123
  SourceManager &SM = CI.getSourceManager();
1018
1019
  // For ThinLTO backend invocations, ensure that the context
1020
  // merges types based on ODR identifiers. We also need to read
1021
  // the correct module out of a multi-module bitcode file.
1022
123
  if (!CI.getCodeGenOpts().ThinLTOIndexFile.empty()) {
1023
60
    VMContext->enableDebugTypeODRUniquing();
1024
1025
0
    auto DiagErrors = [&](Error E) -> std::unique_ptr<llvm::Module> {
1026
0
      unsigned DiagID =
1027
0
          CI.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error, "%0");
1028
0
      handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
1029
0
        CI.getDiagnostics().Report(DiagID) << EIB.message();
1030
0
      });
1031
0
      return {};
1032
0
    };
1033
1034
60
    Expected<std::vector<BitcodeModule>> BMsOrErr = getBitcodeModuleList(MBRef);
1035
60
    if (!BMsOrErr)
1036
0
      return DiagErrors(BMsOrErr.takeError());
1037
60
    BitcodeModule *Bm = llvm::lto::findThinLTOModule(*BMsOrErr);
1038
    // We have nothing to do if the file contains no ThinLTO module. This is
1039
    // possible if ThinLTO compilation was not able to split module. Content of
1040
    // the file was already processed by indexing and will be passed to the
1041
    // linker using merged object file.
1042
60
    if (!Bm) {
1043
1
      auto M = std::make_unique<llvm::Module>("empty", *VMContext);
1044
1
      M->setTargetTriple(CI.getTargetOpts().Triple);
1045
1
      return M;
1046
1
    }
1047
59
    Expected<std::unique_ptr<llvm::Module>> MOrErr =
1048
59
        Bm->parseModule(*VMContext);
1049
59
    if (!MOrErr)
1050
0
      return DiagErrors(MOrErr.takeError());
1051
59
    return std::move(*MOrErr);
1052
59
  }
1053
1054
63
  llvm::SMDiagnostic Err;
1055
63
  if (std::unique_ptr<llvm::Module> M = parseIR(MBRef, Err, *VMContext))
1056
62
    return M;
1057
1058
  // Translate from the diagnostic info to the SourceManager location if
1059
  // available.
1060
  // TODO: Unify this with ConvertBackendLocation()
1061
1
  SourceLocation Loc;
1062
1
  if (Err.getLineNo() > 0) {
1063
1
    assert(Err.getColumnNo() >= 0);
1064
1
    Loc = SM.translateFileLineCol(SM.getFileEntryForID(SM.getMainFileID()),
1065
1
                                  Err.getLineNo(), Err.getColumnNo() + 1);
1066
1
  }
1067
1068
  // Strip off a leading diagnostic code if there is one.
1069
1
  StringRef Msg = Err.getMessage();
1070
1
  if (Msg.startswith("error: "))
1071
0
    Msg = Msg.substr(7);
1072
1073
1
  unsigned DiagID =
1074
1
      CI.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error, "%0");
1075
1076
1
  CI.getDiagnostics().Report(Loc, DiagID) << Msg;
1077
1
  return {};
1078
1
}
1079
1080
17.9k
void CodeGenAction::ExecuteAction() {
1081
17.9k
  if (getCurrentFileKind().getLanguage() != Language::LLVM_IR) {
1082
17.8k
    this->ASTFrontendAction::ExecuteAction();
1083
17.8k
    return;
1084
17.8k
  }
1085
1086
  // If this is an IR file, we have to treat it specially.
1087
123
  BackendAction BA = static_cast<BackendAction>(Act);
1088
123
  CompilerInstance &CI = getCompilerInstance();
1089
123
  auto &CodeGenOpts = CI.getCodeGenOpts();
1090
123
  auto &Diagnostics = CI.getDiagnostics();
1091
123
  std::unique_ptr<raw_pwrite_stream> OS =
1092
123
      GetOutputStream(CI, getCurrentFile(), BA);
1093
123
  if (BA != Backend_EmitNothing && !OS)
1094
0
    return;
1095
1096
123
  SourceManager &SM = CI.getSourceManager();
1097
123
  FileID FID = SM.getMainFileID();
1098
123
  Optional<MemoryBufferRef> MainFile = SM.getBufferOrNone(FID);
1099
123
  if (!MainFile)
1100
0
    return;
1101
1102
123
  TheModule = loadModule(*MainFile);
1103
123
  if (!TheModule)
1104
1
    return;
1105
1106
122
  const TargetOptions &TargetOpts = CI.getTargetOpts();
1107
122
  if (TheModule->getTargetTriple() != TargetOpts.Triple) {
1108
35
    Diagnostics.Report(SourceLocation(), diag::warn_fe_override_module)
1109
35
        << TargetOpts.Triple;
1110
35
    TheModule->setTargetTriple(TargetOpts.Triple);
1111
35
  }
1112
1113
122
  EmbedBitcode(TheModule.get(), CodeGenOpts, *MainFile);
1114
1115
122
  LLVMContext &Ctx = TheModule->getContext();
1116
122
  Ctx.setInlineAsmDiagnosticHandler(BitcodeInlineAsmDiagHandler, &Diagnostics);
1117
1118
  // Set clang diagnostic handler. To do this we need to create a fake
1119
  // BackendConsumer.
1120
122
  BackendConsumer Result(BA, CI.getDiagnostics(), CI.getHeaderSearchOpts(),
1121
122
                         CI.getPreprocessorOpts(), CI.getCodeGenOpts(),
1122
122
                         CI.getTargetOpts(), CI.getLangOpts(),
1123
122
                         std::move(LinkModules), *VMContext, nullptr);
1124
  // PR44896: Force DiscardValueNames as false. DiscardValueNames cannot be
1125
  // true here because the valued names are needed for reading textual IR.
1126
122
  Ctx.setDiscardValueNames(false);
1127
122
  Ctx.setDiagnosticHandler(
1128
122
      std::make_unique<ClangDiagnosticHandler>(CodeGenOpts, &Result));
1129
1130
122
  Expected<std::unique_ptr<llvm::ToolOutputFile>> OptRecordFileOrErr =
1131
122
      setupLLVMOptimizationRemarks(
1132
122
          Ctx, CodeGenOpts.OptRecordFile, CodeGenOpts.OptRecordPasses,
1133
122
          CodeGenOpts.OptRecordFormat, CodeGenOpts.DiagnosticsWithHotness,
1134
122
          CodeGenOpts.DiagnosticsHotnessThreshold);
1135
1136
122
  if (Error E = OptRecordFileOrErr.takeError()) {
1137
0
    reportOptRecordError(std::move(E), Diagnostics, CodeGenOpts);
1138
0
    return;
1139
0
  }
1140
122
  std::unique_ptr<llvm::ToolOutputFile> OptRecordFile =
1141
122
      std::move(*OptRecordFileOrErr);
1142
1143
122
  EmitBackendOutput(Diagnostics, CI.getHeaderSearchOpts(), CodeGenOpts,
1144
122
                    TargetOpts, CI.getLangOpts(),
1145
122
                    CI.getTarget().getDataLayout(), TheModule.get(), BA,
1146
122
                    std::move(OS));
1147
122
  if (OptRecordFile)
1148
2
    OptRecordFile->keep();
1149
122
}
1150
1151
//
1152
1153
0
void EmitAssemblyAction::anchor() { }
1154
EmitAssemblyAction::EmitAssemblyAction(llvm::LLVMContext *_VMContext)
1155
587
  : CodeGenAction(Backend_EmitAssembly, _VMContext) {}
1156
1157
0
void EmitBCAction::anchor() { }
1158
EmitBCAction::EmitBCAction(llvm::LLVMContext *_VMContext)
1159
573
  : CodeGenAction(Backend_EmitBC, _VMContext) {}
1160
1161
0
void EmitLLVMAction::anchor() { }
1162
EmitLLVMAction::EmitLLVMAction(llvm::LLVMContext *_VMContext)
1163
13.1k
  : CodeGenAction(Backend_EmitLL, _VMContext) {}
1164
1165
0
void EmitLLVMOnlyAction::anchor() { }
1166
EmitLLVMOnlyAction::EmitLLVMOnlyAction(llvm::LLVMContext *_VMContext)
1167
243
  : CodeGenAction(Backend_EmitNothing, _VMContext) {}
1168
1169
0
void EmitCodeGenOnlyAction::anchor() { }
1170
EmitCodeGenOnlyAction::EmitCodeGenOnlyAction(llvm::LLVMContext *_VMContext)
1171
3
  : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
1172
1173
0
void EmitObjAction::anchor() { }
1174
EmitObjAction::EmitObjAction(llvm::LLVMContext *_VMContext)
1175
3.42k
  : CodeGenAction(Backend_EmitObj, _VMContext) {}