Coverage Report

Created: 2022-07-16 07:03

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/BackendUtil.cpp
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//===--- BackendUtil.cpp - LLVM Backend Utilities -------------------------===//
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//
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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.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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9
#include "clang/CodeGen/BackendUtil.h"
10
#include "clang/Basic/CodeGenOptions.h"
11
#include "clang/Basic/Diagnostic.h"
12
#include "clang/Basic/LangOptions.h"
13
#include "clang/Basic/TargetOptions.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
15
#include "clang/Frontend/Utils.h"
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#include "clang/Lex/HeaderSearchOptions.h"
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#include "llvm/ADT/SmallSet.h"
18
#include "llvm/ADT/StringExtras.h"
19
#include "llvm/ADT/StringSwitch.h"
20
#include "llvm/ADT/Triple.h"
21
#include "llvm/Analysis/AliasAnalysis.h"
22
#include "llvm/Analysis/StackSafetyAnalysis.h"
23
#include "llvm/Analysis/TargetLibraryInfo.h"
24
#include "llvm/Analysis/TargetTransformInfo.h"
25
#include "llvm/Bitcode/BitcodeReader.h"
26
#include "llvm/Bitcode/BitcodeWriter.h"
27
#include "llvm/Bitcode/BitcodeWriterPass.h"
28
#include "llvm/CodeGen/RegAllocRegistry.h"
29
#include "llvm/CodeGen/SchedulerRegistry.h"
30
#include "llvm/CodeGen/TargetSubtargetInfo.h"
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#include "llvm/IR/DataLayout.h"
32
#include "llvm/IR/IRPrintingPasses.h"
33
#include "llvm/IR/LegacyPassManager.h"
34
#include "llvm/IR/Module.h"
35
#include "llvm/IR/ModuleSummaryIndex.h"
36
#include "llvm/IR/PassManager.h"
37
#include "llvm/IR/Verifier.h"
38
#include "llvm/LTO/LTOBackend.h"
39
#include "llvm/MC/MCAsmInfo.h"
40
#include "llvm/MC/SubtargetFeature.h"
41
#include "llvm/MC/TargetRegistry.h"
42
#include "llvm/Object/OffloadBinary.h"
43
#include "llvm/Passes/PassBuilder.h"
44
#include "llvm/Passes/PassPlugin.h"
45
#include "llvm/Passes/StandardInstrumentations.h"
46
#include "llvm/Support/BuryPointer.h"
47
#include "llvm/Support/CommandLine.h"
48
#include "llvm/Support/MemoryBuffer.h"
49
#include "llvm/Support/PrettyStackTrace.h"
50
#include "llvm/Support/TimeProfiler.h"
51
#include "llvm/Support/Timer.h"
52
#include "llvm/Support/ToolOutputFile.h"
53
#include "llvm/Support/raw_ostream.h"
54
#include "llvm/Target/TargetMachine.h"
55
#include "llvm/Target/TargetOptions.h"
56
#include "llvm/Transforms/Coroutines/CoroCleanup.h"
57
#include "llvm/Transforms/Coroutines/CoroEarly.h"
58
#include "llvm/Transforms/Coroutines/CoroElide.h"
59
#include "llvm/Transforms/Coroutines/CoroSplit.h"
60
#include "llvm/Transforms/IPO.h"
61
#include "llvm/Transforms/IPO/AlwaysInliner.h"
62
#include "llvm/Transforms/IPO/LowerTypeTests.h"
63
#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
64
#include "llvm/Transforms/InstCombine/InstCombine.h"
65
#include "llvm/Transforms/Instrumentation.h"
66
#include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
67
#include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
68
#include "llvm/Transforms/Instrumentation/BoundsChecking.h"
69
#include "llvm/Transforms/Instrumentation/DataFlowSanitizer.h"
70
#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
71
#include "llvm/Transforms/Instrumentation/HWAddressSanitizer.h"
72
#include "llvm/Transforms/Instrumentation/InstrProfiling.h"
73
#include "llvm/Transforms/Instrumentation/MemProfiler.h"
74
#include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
75
#include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
76
#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
77
#include "llvm/Transforms/ObjCARC.h"
78
#include "llvm/Transforms/Scalar.h"
79
#include "llvm/Transforms/Scalar/EarlyCSE.h"
80
#include "llvm/Transforms/Scalar/GVN.h"
81
#include "llvm/Transforms/Scalar/LowerMatrixIntrinsics.h"
82
#include "llvm/Transforms/Utils.h"
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#include "llvm/Transforms/Utils/CanonicalizeAliases.h"
84
#include "llvm/Transforms/Utils/Debugify.h"
85
#include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
86
#include "llvm/Transforms/Utils/ModuleUtils.h"
87
#include "llvm/Transforms/Utils/NameAnonGlobals.h"
88
#include "llvm/Transforms/Utils/SymbolRewriter.h"
89
#include <memory>
90
using namespace clang;
91
using namespace llvm;
92
93
#define HANDLE_EXTENSION(Ext)                                                  \
94
  llvm::PassPluginLibraryInfo get##Ext##PluginInfo();
95
#include "llvm/Support/Extension.def"
96
97
namespace llvm {
98
extern cl::opt<bool> DebugInfoCorrelate;
99
}
100
101
namespace {
102
103
// Default filename used for profile generation.
104
11
std::string getDefaultProfileGenName() {
105
11
  return DebugInfoCorrelate ? 
"default_%p.proflite"0
: "default_%m.profraw";
106
11
}
107
108
class EmitAssemblyHelper {
109
  DiagnosticsEngine &Diags;
110
  const HeaderSearchOptions &HSOpts;
111
  const CodeGenOptions &CodeGenOpts;
112
  const clang::TargetOptions &TargetOpts;
113
  const LangOptions &LangOpts;
114
  Module *TheModule;
115
116
  Timer CodeGenerationTime;
117
118
  std::unique_ptr<raw_pwrite_stream> OS;
119
120
  Triple TargetTriple;
121
122
4.47k
  TargetIRAnalysis getTargetIRAnalysis() const {
123
4.47k
    if (TM)
124
4.47k
      return TM->getTargetIRAnalysis();
125
126
0
    return TargetIRAnalysis();
127
4.47k
  }
128
129
  /// Generates the TargetMachine.
130
  /// Leaves TM unchanged if it is unable to create the target machine.
131
  /// Some of our clang tests specify triples which are not built
132
  /// into clang. This is okay because these tests check the generated
133
  /// IR, and they require DataLayout which depends on the triple.
134
  /// In this case, we allow this method to fail and not report an error.
135
  /// When MustCreateTM is used, we print an error if we are unable to load
136
  /// the requested target.
137
  void CreateTargetMachine(bool MustCreateTM);
138
139
  /// Add passes necessary to emit assembly or LLVM IR.
140
  ///
141
  /// \return True on success.
142
  bool AddEmitPasses(legacy::PassManager &CodeGenPasses, BackendAction Action,
143
                     raw_pwrite_stream &OS, raw_pwrite_stream *DwoOS);
144
145
7
  std::unique_ptr<llvm::ToolOutputFile> openOutputFile(StringRef Path) {
146
7
    std::error_code EC;
147
7
    auto F = std::make_unique<llvm::ToolOutputFile>(Path, EC,
148
7
                                                     llvm::sys::fs::OF_None);
149
7
    if (EC) {
150
0
      Diags.Report(diag::err_fe_unable_to_open_output) << Path << EC.message();
151
0
      F.reset();
152
0
    }
153
7
    return F;
154
7
  }
155
156
  void
157
  RunOptimizationPipeline(BackendAction Action,
158
                          std::unique_ptr<raw_pwrite_stream> &OS,
159
                          std::unique_ptr<llvm::ToolOutputFile> &ThinLinkOS);
160
  void RunCodegenPipeline(BackendAction Action,
161
                          std::unique_ptr<raw_pwrite_stream> &OS,
162
                          std::unique_ptr<llvm::ToolOutputFile> &DwoOS);
163
164
  /// Check whether we should emit a module summary for regular LTO.
165
  /// The module summary should be emitted by default for regular LTO
166
  /// except for ld64 targets.
167
  ///
168
  /// \return True if the module summary should be emitted.
169
514
  bool shouldEmitRegularLTOSummary() const {
170
514
    return CodeGenOpts.PrepareForLTO && 
!CodeGenOpts.DisableLLVMPasses22
&&
171
514
           
TargetTriple.getVendor() != llvm::Triple::Apple19
;
172
514
  }
173
174
public:
175
  EmitAssemblyHelper(DiagnosticsEngine &_Diags,
176
                     const HeaderSearchOptions &HeaderSearchOpts,
177
                     const CodeGenOptions &CGOpts,
178
                     const clang::TargetOptions &TOpts,
179
                     const LangOptions &LOpts, Module *M)
180
      : Diags(_Diags), HSOpts(HeaderSearchOpts), CodeGenOpts(CGOpts),
181
        TargetOpts(TOpts), LangOpts(LOpts), TheModule(M),
182
        CodeGenerationTime("codegen", "Code Generation Time"),
183
20.4k
        TargetTriple(TheModule->getTargetTriple()) {}
184
185
20.4k
  ~EmitAssemblyHelper() {
186
20.4k
    if (CodeGenOpts.DisableFree)
187
4.32k
      BuryPointer(std::move(TM));
188
20.4k
  }
189
190
  std::unique_ptr<TargetMachine> TM;
191
192
  // Emit output using the new pass manager for the optimization pipeline.
193
  void EmitAssembly(BackendAction Action,
194
                    std::unique_ptr<raw_pwrite_stream> OS);
195
};
196
}
197
198
static SanitizerCoverageOptions
199
16
getSancovOptsFromCGOpts(const CodeGenOptions &CGOpts) {
200
16
  SanitizerCoverageOptions Opts;
201
16
  Opts.CoverageType =
202
16
      static_cast<SanitizerCoverageOptions::Type>(CGOpts.SanitizeCoverageType);
203
16
  Opts.IndirectCalls = CGOpts.SanitizeCoverageIndirectCalls;
204
16
  Opts.TraceBB = CGOpts.SanitizeCoverageTraceBB;
205
16
  Opts.TraceCmp = CGOpts.SanitizeCoverageTraceCmp;
206
16
  Opts.TraceDiv = CGOpts.SanitizeCoverageTraceDiv;
207
16
  Opts.TraceGep = CGOpts.SanitizeCoverageTraceGep;
208
16
  Opts.Use8bitCounters = CGOpts.SanitizeCoverage8bitCounters;
209
16
  Opts.TracePC = CGOpts.SanitizeCoverageTracePC;
210
16
  Opts.TracePCGuard = CGOpts.SanitizeCoverageTracePCGuard;
211
16
  Opts.NoPrune = CGOpts.SanitizeCoverageNoPrune;
212
16
  Opts.Inline8bitCounters = CGOpts.SanitizeCoverageInline8bitCounters;
213
16
  Opts.InlineBoolFlag = CGOpts.SanitizeCoverageInlineBoolFlag;
214
16
  Opts.PCTable = CGOpts.SanitizeCoveragePCTable;
215
16
  Opts.StackDepth = CGOpts.SanitizeCoverageStackDepth;
216
16
  Opts.TraceLoads = CGOpts.SanitizeCoverageTraceLoads;
217
16
  Opts.TraceStores = CGOpts.SanitizeCoverageTraceStores;
218
16
  return Opts;
219
16
}
220
221
// Check if ASan should use GC-friendly instrumentation for globals.
222
// First of all, there is no point if -fdata-sections is off (expect for MachO,
223
// where this is not a factor). Also, on ELF this feature requires an assembler
224
// extension that only works with -integrated-as at the moment.
225
104
static bool asanUseGlobalsGC(const Triple &T, const CodeGenOptions &CGOpts) {
226
104
  if (!CGOpts.SanitizeAddressGlobalsDeadStripping)
227
89
    return false;
228
15
  switch (T.getObjectFormat()) {
229
8
  case Triple::MachO:
230
10
  case Triple::COFF:
231
10
    return true;
232
5
  case Triple::ELF:
233
5
    return !CGOpts.DisableIntegratedAS;
234
0
  case Triple::GOFF:
235
0
    llvm::report_fatal_error("ASan not implemented for GOFF");
236
0
  case Triple::XCOFF:
237
0
    llvm::report_fatal_error("ASan not implemented for XCOFF.");
238
0
  case Triple::Wasm:
239
0
  case Triple::DXContainer:
240
0
  case Triple::SPIRV:
241
0
  case Triple::UnknownObjectFormat:
242
0
    break;
243
15
  }
244
0
  return false;
245
15
}
246
247
static TargetLibraryInfoImpl *createTLII(llvm::Triple &TargetTriple,
248
24.9k
                                         const CodeGenOptions &CodeGenOpts) {
249
24.9k
  TargetLibraryInfoImpl *TLII = new TargetLibraryInfoImpl(TargetTriple);
250
251
24.9k
  switch (CodeGenOpts.getVecLib()) {
252
0
  case CodeGenOptions::Accelerate:
253
0
    TLII->addVectorizableFunctionsFromVecLib(TargetLibraryInfoImpl::Accelerate);
254
0
    break;
255
0
  case CodeGenOptions::LIBMVEC:
256
0
    switch(TargetTriple.getArch()) {
257
0
      default:
258
0
        break;
259
0
      case llvm::Triple::x86_64:
260
0
        TLII->addVectorizableFunctionsFromVecLib
261
0
                (TargetLibraryInfoImpl::LIBMVEC_X86);
262
0
        break;
263
0
    }
264
0
    break;
265
0
  case CodeGenOptions::MASSV:
266
0
    TLII->addVectorizableFunctionsFromVecLib(TargetLibraryInfoImpl::MASSV);
267
0
    break;
268
0
  case CodeGenOptions::SVML:
269
0
    TLII->addVectorizableFunctionsFromVecLib(TargetLibraryInfoImpl::SVML);
270
0
    break;
271
1
  case CodeGenOptions::Darwin_libsystem_m:
272
1
    TLII->addVectorizableFunctionsFromVecLib(
273
1
        TargetLibraryInfoImpl::DarwinLibSystemM);
274
1
    break;
275
24.9k
  default:
276
24.9k
    break;
277
24.9k
  }
278
24.9k
  return TLII;
279
24.9k
}
280
281
16.9k
static CodeGenOpt::Level getCGOptLevel(const CodeGenOptions &CodeGenOpts) {
282
16.9k
  switch (CodeGenOpts.OptimizationLevel) {
283
0
  default:
284
0
    llvm_unreachable("Invalid optimization level!");
285
13.9k
  case 0:
286
13.9k
    return CodeGenOpt::None;
287
2.26k
  case 1:
288
2.26k
    return CodeGenOpt::Less;
289
597
  case 2:
290
597
    return CodeGenOpt::Default; // O2/Os/Oz
291
179
  case 3:
292
179
    return CodeGenOpt::Aggressive;
293
16.9k
  }
294
16.9k
}
295
296
static Optional<llvm::CodeModel::Model>
297
16.9k
getCodeModel(const CodeGenOptions &CodeGenOpts) {
298
16.9k
  unsigned CodeModel = llvm::StringSwitch<unsigned>(CodeGenOpts.CodeModel)
299
16.9k
                           .Case("tiny", llvm::CodeModel::Tiny)
300
16.9k
                           .Case("small", llvm::CodeModel::Small)
301
16.9k
                           .Case("kernel", llvm::CodeModel::Kernel)
302
16.9k
                           .Case("medium", llvm::CodeModel::Medium)
303
16.9k
                           .Case("large", llvm::CodeModel::Large)
304
16.9k
                           .Case("default", ~1u)
305
16.9k
                           .Default(~0u);
306
16.9k
  assert(CodeModel != ~0u && "invalid code model!");
307
16.9k
  if (CodeModel == ~1u)
308
16.9k
    return None;
309
5
  return static_cast<llvm::CodeModel::Model>(CodeModel);
310
16.9k
}
311
312
4.50k
static CodeGenFileType getCodeGenFileType(BackendAction Action) {
313
4.50k
  if (Action == Backend_EmitObj)
314
3.99k
    return CGFT_ObjectFile;
315
515
  else if (Action == Backend_EmitMCNull)
316
8
    return CGFT_Null;
317
507
  else {
318
507
    assert(Action == Backend_EmitAssembly && "Invalid action!");
319
0
    return CGFT_AssemblyFile;
320
507
  }
321
4.50k
}
322
323
40.8k
static bool actionRequiresCodeGen(BackendAction Action) {
324
40.8k
  return Action != Backend_EmitNothing && 
Action != Backend_EmitBC40.2k
&&
325
40.8k
         
Action != Backend_EmitLL39.1k
;
326
40.8k
}
327
328
static bool initTargetOptions(DiagnosticsEngine &Diags,
329
                              llvm::TargetOptions &Options,
330
                              const CodeGenOptions &CodeGenOpts,
331
                              const clang::TargetOptions &TargetOpts,
332
                              const LangOptions &LangOpts,
333
16.9k
                              const HeaderSearchOptions &HSOpts) {
334
16.9k
  switch (LangOpts.getThreadModel()) {
335
16.5k
  case LangOptions::ThreadModelKind::POSIX:
336
16.5k
    Options.ThreadModel = llvm::ThreadModel::POSIX;
337
16.5k
    break;
338
351
  case LangOptions::ThreadModelKind::Single:
339
351
    Options.ThreadModel = llvm::ThreadModel::Single;
340
351
    break;
341
16.9k
  }
342
343
  // Set float ABI type.
344
16.9k
  assert((CodeGenOpts.FloatABI == "soft" || CodeGenOpts.FloatABI == "softfp" ||
345
16.9k
          CodeGenOpts.FloatABI == "hard" || CodeGenOpts.FloatABI.empty()) &&
346
16.9k
         "Invalid Floating Point ABI!");
347
0
  Options.FloatABIType =
348
16.9k
      llvm::StringSwitch<llvm::FloatABI::ABIType>(CodeGenOpts.FloatABI)
349
16.9k
          .Case("soft", llvm::FloatABI::Soft)
350
16.9k
          .Case("softfp", llvm::FloatABI::Soft)
351
16.9k
          .Case("hard", llvm::FloatABI::Hard)
352
16.9k
          .Default(llvm::FloatABI::Default);
353
354
  // Set FP fusion mode.
355
16.9k
  switch (LangOpts.getDefaultFPContractMode()) {
356
12.2k
  case LangOptions::FPM_Off:
357
    // Preserve any contraction performed by the front-end.  (Strict performs
358
    // splitting of the muladd intrinsic in the backend.)
359
12.2k
    Options.AllowFPOpFusion = llvm::FPOpFusion::Standard;
360
12.2k
    break;
361
4.52k
  case LangOptions::FPM_On:
362
4.63k
  case LangOptions::FPM_FastHonorPragmas:
363
4.63k
    Options.AllowFPOpFusion = llvm::FPOpFusion::Standard;
364
4.63k
    break;
365
75
  case LangOptions::FPM_Fast:
366
75
    Options.AllowFPOpFusion = llvm::FPOpFusion::Fast;
367
75
    break;
368
16.9k
  }
369
370
16.9k
  Options.BinutilsVersion =
371
16.9k
      llvm::TargetMachine::parseBinutilsVersion(CodeGenOpts.BinutilsVersion);
372
16.9k
  Options.UseInitArray = CodeGenOpts.UseInitArray;
373
16.9k
  Options.LowerGlobalDtorsViaCxaAtExit =
374
16.9k
      CodeGenOpts.RegisterGlobalDtorsWithAtExit;
375
16.9k
  Options.DisableIntegratedAS = CodeGenOpts.DisableIntegratedAS;
376
16.9k
  Options.CompressDebugSections = CodeGenOpts.getCompressDebugSections();
377
16.9k
  Options.RelaxELFRelocations = CodeGenOpts.RelaxELFRelocations;
378
379
  // Set EABI version.
380
16.9k
  Options.EABIVersion = TargetOpts.EABIVersion;
381
382
16.9k
  if (LangOpts.hasSjLjExceptions())
383
28
    Options.ExceptionModel = llvm::ExceptionHandling::SjLj;
384
16.9k
  if (LangOpts.hasSEHExceptions())
385
22
    Options.ExceptionModel = llvm::ExceptionHandling::WinEH;
386
16.9k
  if (LangOpts.hasDWARFExceptions())
387
22
    Options.ExceptionModel = llvm::ExceptionHandling::DwarfCFI;
388
16.9k
  if (LangOpts.hasWasmExceptions())
389
0
    Options.ExceptionModel = llvm::ExceptionHandling::Wasm;
390
391
16.9k
  Options.NoInfsFPMath = LangOpts.NoHonorInfs;
392
16.9k
  Options.NoNaNsFPMath = LangOpts.NoHonorNaNs;
393
16.9k
  Options.NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
394
16.9k
  Options.UnsafeFPMath = LangOpts.UnsafeFPMath;
395
16.9k
  Options.ApproxFuncFPMath = LangOpts.ApproxFunc;
396
397
16.9k
  Options.BBSections =
398
16.9k
      llvm::StringSwitch<llvm::BasicBlockSection>(CodeGenOpts.BBSections)
399
16.9k
          .Case("all", llvm::BasicBlockSection::All)
400
16.9k
          .Case("labels", llvm::BasicBlockSection::Labels)
401
16.9k
          .StartsWith("list=", llvm::BasicBlockSection::List)
402
16.9k
          .Case("none", llvm::BasicBlockSection::None)
403
16.9k
          .Default(llvm::BasicBlockSection::None);
404
405
16.9k
  if (Options.BBSections == llvm::BasicBlockSection::List) {
406
2
    ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
407
2
        MemoryBuffer::getFile(CodeGenOpts.BBSections.substr(5));
408
2
    if (!MBOrErr) {
409
1
      Diags.Report(diag::err_fe_unable_to_load_basic_block_sections_file)
410
1
          << MBOrErr.getError().message();
411
1
      return false;
412
1
    }
413
1
    Options.BBSectionsFuncListBuf = std::move(*MBOrErr);
414
1
  }
415
416
16.9k
  Options.EnableMachineFunctionSplitter = CodeGenOpts.SplitMachineFunctions;
417
16.9k
  Options.FunctionSections = CodeGenOpts.FunctionSections;
418
16.9k
  Options.DataSections = CodeGenOpts.DataSections;
419
16.9k
  Options.IgnoreXCOFFVisibility = LangOpts.IgnoreXCOFFVisibility;
420
16.9k
  Options.UniqueSectionNames = CodeGenOpts.UniqueSectionNames;
421
16.9k
  Options.UniqueBasicBlockSectionNames =
422
16.9k
      CodeGenOpts.UniqueBasicBlockSectionNames;
423
16.9k
  Options.TLSSize = CodeGenOpts.TLSSize;
424
16.9k
  Options.EmulatedTLS = CodeGenOpts.EmulatedTLS;
425
16.9k
  Options.ExplicitEmulatedTLS = CodeGenOpts.ExplicitEmulatedTLS;
426
16.9k
  Options.DebuggerTuning = CodeGenOpts.getDebuggerTuning();
427
16.9k
  Options.EmitStackSizeSection = CodeGenOpts.StackSizeSection;
428
16.9k
  Options.StackUsageOutput = CodeGenOpts.StackUsageOutput;
429
16.9k
  Options.EmitAddrsig = CodeGenOpts.Addrsig;
430
16.9k
  Options.ForceDwarfFrameSection = CodeGenOpts.ForceDwarfFrameSection;
431
16.9k
  Options.EmitCallSiteInfo = CodeGenOpts.EmitCallSiteInfo;
432
16.9k
  Options.EnableAIXExtendedAltivecABI = CodeGenOpts.EnableAIXExtendedAltivecABI;
433
16.9k
  Options.XRayOmitFunctionIndex = CodeGenOpts.XRayOmitFunctionIndex;
434
16.9k
  Options.LoopAlignment = CodeGenOpts.LoopAlignment;
435
16.9k
  Options.DebugStrictDwarf = CodeGenOpts.DebugStrictDwarf;
436
16.9k
  Options.ObjectFilenameForDebug = CodeGenOpts.ObjectFilenameForDebug;
437
16.9k
  Options.Hotpatch = CodeGenOpts.HotPatch;
438
16.9k
  Options.JMCInstrument = CodeGenOpts.JMCInstrument;
439
440
16.9k
  switch (CodeGenOpts.getSwiftAsyncFramePointer()) {
441
4
  case CodeGenOptions::SwiftAsyncFramePointerKind::Auto:
442
4
    Options.SwiftAsyncFramePointer =
443
4
        SwiftAsyncFramePointerMode::DeploymentBased;
444
4
    break;
445
446
16.9k
  case CodeGenOptions::SwiftAsyncFramePointerKind::Always:
447
16.9k
    Options.SwiftAsyncFramePointer = SwiftAsyncFramePointerMode::Always;
448
16.9k
    break;
449
450
4
  case CodeGenOptions::SwiftAsyncFramePointerKind::Never:
451
4
    Options.SwiftAsyncFramePointer = SwiftAsyncFramePointerMode::Never;
452
4
    break;
453
16.9k
  }
454
455
16.9k
  Options.MCOptions.SplitDwarfFile = CodeGenOpts.SplitDwarfFile;
456
16.9k
  Options.MCOptions.EmitDwarfUnwind = CodeGenOpts.getEmitDwarfUnwind();
457
16.9k
  Options.MCOptions.MCRelaxAll = CodeGenOpts.RelaxAll;
458
16.9k
  Options.MCOptions.MCSaveTempLabels = CodeGenOpts.SaveTempLabels;
459
16.9k
  Options.MCOptions.MCUseDwarfDirectory =
460
16.9k
      CodeGenOpts.NoDwarfDirectoryAsm
461
16.9k
          ? 
llvm::MCTargetOptions::DisableDwarfDirectory4
462
16.9k
          : 
llvm::MCTargetOptions::EnableDwarfDirectory16.9k
;
463
16.9k
  Options.MCOptions.MCNoExecStack = CodeGenOpts.NoExecStack;
464
16.9k
  Options.MCOptions.MCIncrementalLinkerCompatible =
465
16.9k
      CodeGenOpts.IncrementalLinkerCompatible;
466
16.9k
  Options.MCOptions.MCFatalWarnings = CodeGenOpts.FatalWarnings;
467
16.9k
  Options.MCOptions.MCNoWarn = CodeGenOpts.NoWarn;
468
16.9k
  Options.MCOptions.AsmVerbose = CodeGenOpts.AsmVerbose;
469
16.9k
  Options.MCOptions.Dwarf64 = CodeGenOpts.Dwarf64;
470
16.9k
  Options.MCOptions.PreserveAsmComments = CodeGenOpts.PreserveAsmComments;
471
16.9k
  Options.MCOptions.ABIName = TargetOpts.ABI;
472
16.9k
  for (const auto &Entry : HSOpts.UserEntries)
473
39.0k
    if (!Entry.IsFramework &&
474
39.0k
        
(39.0k
Entry.Group == frontend::IncludeDirGroup::Quoted39.0k
||
475
39.0k
         
Entry.Group == frontend::IncludeDirGroup::Angled39.0k
||
476
39.0k
         
Entry.Group == frontend::IncludeDirGroup::System28.0k
))
477
34.4k
      Options.MCOptions.IASSearchPaths.push_back(
478
34.4k
          Entry.IgnoreSysRoot ? Entry.Path : 
HSOpts.Sysroot + Entry.Path0
);
479
16.9k
  Options.MCOptions.Argv0 = CodeGenOpts.Argv0;
480
16.9k
  Options.MCOptions.CommandLineArgs = CodeGenOpts.CommandLineArgs;
481
16.9k
  Options.MisExpect = CodeGenOpts.MisExpect;
482
483
16.9k
  return true;
484
16.9k
}
485
486
static Optional<GCOVOptions> getGCOVOptions(const CodeGenOptions &CodeGenOpts,
487
19.8k
                                            const LangOptions &LangOpts) {
488
19.8k
  if (!CodeGenOpts.EmitGcovArcs && 
!CodeGenOpts.EmitGcovNotes19.8k
)
489
19.8k
    return None;
490
  // Not using 'GCOVOptions::getDefault' allows us to avoid exiting if
491
  // LLVM's -default-gcov-version flag is set to something invalid.
492
16
  GCOVOptions Options;
493
16
  Options.EmitNotes = CodeGenOpts.EmitGcovNotes;
494
16
  Options.EmitData = CodeGenOpts.EmitGcovArcs;
495
16
  llvm::copy(CodeGenOpts.CoverageVersion, std::begin(Options.Version));
496
16
  Options.NoRedZone = CodeGenOpts.DisableRedZone;
497
16
  Options.Filter = CodeGenOpts.ProfileFilterFiles;
498
16
  Options.Exclude = CodeGenOpts.ProfileExcludeFiles;
499
16
  Options.Atomic = CodeGenOpts.AtomicProfileUpdate;
500
16
  return Options;
501
19.8k
}
502
503
static Optional<InstrProfOptions>
504
getInstrProfOptions(const CodeGenOptions &CodeGenOpts,
505
19.8k
                    const LangOptions &LangOpts) {
506
19.8k
  if (!CodeGenOpts.hasProfileClangInstr())
507
19.7k
    return None;
508
117
  InstrProfOptions Options;
509
117
  Options.NoRedZone = CodeGenOpts.DisableRedZone;
510
117
  Options.InstrProfileOutput = CodeGenOpts.InstrProfileOutput;
511
117
  Options.Atomic = CodeGenOpts.AtomicProfileUpdate;
512
117
  return Options;
513
19.8k
}
514
515
20.4k
static void setCommandLineOpts(const CodeGenOptions &CodeGenOpts) {
516
20.4k
  SmallVector<const char *, 16> BackendArgs;
517
20.4k
  BackendArgs.push_back("clang"); // Fake program name.
518
20.4k
  if (!CodeGenOpts.DebugPass.empty()) {
519
1
    BackendArgs.push_back("-debug-pass");
520
1
    BackendArgs.push_back(CodeGenOpts.DebugPass.c_str());
521
1
  }
522
20.4k
  if (!CodeGenOpts.LimitFloatPrecision.empty()) {
523
0
    BackendArgs.push_back("-limit-float-precision");
524
0
    BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str());
525
0
  }
526
  // Check for the default "clang" invocation that won't set any cl::opt values.
527
  // Skip trying to parse the command line invocation to avoid the issues
528
  // described below.
529
20.4k
  if (BackendArgs.size() == 1)
530
20.4k
    return;
531
1
  BackendArgs.push_back(nullptr);
532
  // FIXME: The command line parser below is not thread-safe and shares a global
533
  // state, so this call might crash or overwrite the options of another Clang
534
  // instance in the same process.
535
1
  llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1,
536
1
                                    BackendArgs.data());
537
1
}
538
539
20.4k
void EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) {
540
  // Create the TargetMachine for generating code.
541
20.4k
  std::string Error;
542
20.4k
  std::string Triple = TheModule->getTargetTriple();
543
20.4k
  const llvm::Target *TheTarget = TargetRegistry::lookupTarget(Triple, Error);
544
20.4k
  if (!TheTarget) {
545
3.52k
    if (MustCreateTM)
546
0
      Diags.Report(diag::err_fe_unable_to_create_target) << Error;
547
3.52k
    return;
548
3.52k
  }
549
550
16.9k
  Optional<llvm::CodeModel::Model> CM = getCodeModel(CodeGenOpts);
551
16.9k
  std::string FeaturesStr =
552
16.9k
      llvm::join(TargetOpts.Features.begin(), TargetOpts.Features.end(), ",");
553
16.9k
  llvm::Reloc::Model RM = CodeGenOpts.RelocationModel;
554
16.9k
  CodeGenOpt::Level OptLevel = getCGOptLevel(CodeGenOpts);
555
556
16.9k
  llvm::TargetOptions Options;
557
16.9k
  if (!initTargetOptions(Diags, Options, CodeGenOpts, TargetOpts, LangOpts,
558
16.9k
                         HSOpts))
559
1
    return;
560
16.8k
  TM.reset(TheTarget->createTargetMachine(Triple, TargetOpts.CPU, FeaturesStr,
561
16.8k
                                          Options, RM, CM, OptLevel));
562
16.8k
}
563
564
bool EmitAssemblyHelper::AddEmitPasses(legacy::PassManager &CodeGenPasses,
565
                                       BackendAction Action,
566
                                       raw_pwrite_stream &OS,
567
4.47k
                                       raw_pwrite_stream *DwoOS) {
568
  // Add LibraryInfo.
569
4.47k
  std::unique_ptr<TargetLibraryInfoImpl> TLII(
570
4.47k
      createTLII(TargetTriple, CodeGenOpts));
571
4.47k
  CodeGenPasses.add(new TargetLibraryInfoWrapperPass(*TLII));
572
573
  // Normal mode, emit a .s or .o file by running the code generator. Note,
574
  // this also adds codegenerator level optimization passes.
575
4.47k
  CodeGenFileType CGFT = getCodeGenFileType(Action);
576
577
  // Add ObjC ARC final-cleanup optimizations. This is done as part of the
578
  // "codegen" passes so that it isn't run multiple times when there is
579
  // inlining happening.
580
4.47k
  if (CodeGenOpts.OptimizationLevel > 0)
581
382
    CodeGenPasses.add(createObjCARCContractPass());
582
583
4.47k
  if (TM->addPassesToEmitFile(CodeGenPasses, OS, DwoOS, CGFT,
584
4.47k
                              /*DisableVerify=*/!CodeGenOpts.VerifyModule)) {
585
0
    Diags.Report(diag::err_fe_unable_to_interface_with_target);
586
0
    return false;
587
0
  }
588
589
4.47k
  return true;
590
4.47k
}
591
592
19.8k
static OptimizationLevel mapToLevel(const CodeGenOptions &Opts) {
593
19.8k
  switch (Opts.OptimizationLevel) {
594
0
  default:
595
0
    llvm_unreachable("Invalid optimization level!");
596
597
17.0k
  case 0:
598
17.0k
    return OptimizationLevel::O0;
599
600
2.14k
  case 1:
601
2.14k
    return OptimizationLevel::O1;
602
603
556
  case 2:
604
556
    switch (Opts.OptimizeSize) {
605
0
    default:
606
0
      llvm_unreachable("Invalid optimization level for size!");
607
608
487
    case 0:
609
487
      return OptimizationLevel::O2;
610
611
49
    case 1:
612
49
      return OptimizationLevel::Os;
613
614
20
    case 2:
615
20
      return OptimizationLevel::Oz;
616
556
    }
617
618
172
  case 3:
619
172
    return OptimizationLevel::O3;
620
19.8k
  }
621
19.8k
}
622
623
static void addSanitizers(const Triple &TargetTriple,
624
                          const CodeGenOptions &CodeGenOpts,
625
19.8k
                          const LangOptions &LangOpts, PassBuilder &PB) {
626
19.8k
  PB.registerOptimizerLastEPCallback([&](ModulePassManager &MPM,
627
19.8k
                                         OptimizationLevel Level) {
628
19.8k
    if (CodeGenOpts.hasSanitizeCoverage()) {
629
16
      auto SancovOpts = getSancovOptsFromCGOpts(CodeGenOpts);
630
16
      MPM.addPass(ModuleSanitizerCoveragePass(
631
16
          SancovOpts, CodeGenOpts.SanitizeCoverageAllowlistFiles,
632
16
          CodeGenOpts.SanitizeCoverageIgnorelistFiles));
633
16
    }
634
635
39.7k
    auto MSanPass = [&](SanitizerMask Mask, bool CompileKernel) {
636
39.7k
      if (LangOpts.Sanitize.has(Mask)) {
637
44
        int TrackOrigins = CodeGenOpts.SanitizeMemoryTrackOrigins;
638
44
        bool Recover = CodeGenOpts.SanitizeRecover.has(Mask);
639
640
44
        MemorySanitizerOptions options(TrackOrigins, Recover, CompileKernel,
641
44
                                       CodeGenOpts.SanitizeMemoryParamRetval);
642
44
        MPM.addPass(ModuleMemorySanitizerPass(options));
643
44
        FunctionPassManager FPM;
644
44
        FPM.addPass(MemorySanitizerPass(options));
645
44
        if (Level != OptimizationLevel::O0) {
646
          // MemorySanitizer inserts complex instrumentation that mostly
647
          // follows the logic of the original code, but operates on
648
          // "shadow" values. It can benefit from re-running some
649
          // general purpose optimization passes.
650
20
          FPM.addPass(EarlyCSEPass());
651
          // TODO: Consider add more passes like in
652
          // addGeneralOptsForMemorySanitizer. EarlyCSEPass makes visible
653
          // difference on size. It's not clear if the rest is still
654
          // usefull. InstCombinePass breakes
655
          // compiler-rt/test/msan/select_origin.cpp.
656
20
        }
657
44
        MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
658
44
      }
659
39.7k
    };
660
19.8k
    MSanPass(SanitizerKind::Memory, false);
661
19.8k
    MSanPass(SanitizerKind::KernelMemory, true);
662
663
19.8k
    if (LangOpts.Sanitize.has(SanitizerKind::Thread)) {
664
39
      MPM.addPass(ModuleThreadSanitizerPass());
665
39
      MPM.addPass(createModuleToFunctionPassAdaptor(ThreadSanitizerPass()));
666
39
    }
667
668
39.7k
    auto ASanPass = [&](SanitizerMask Mask, bool CompileKernel) {
669
39.7k
      if (LangOpts.Sanitize.has(Mask)) {
670
104
        bool UseGlobalGC = asanUseGlobalsGC(TargetTriple, CodeGenOpts);
671
104
        bool UseOdrIndicator = CodeGenOpts.SanitizeAddressUseOdrIndicator;
672
104
        llvm::AsanDtorKind DestructorKind =
673
104
            CodeGenOpts.getSanitizeAddressDtor();
674
104
        AddressSanitizerOptions Opts;
675
104
        Opts.CompileKernel = CompileKernel;
676
104
        Opts.Recover = CodeGenOpts.SanitizeRecover.has(Mask);
677
104
        Opts.UseAfterScope = CodeGenOpts.SanitizeAddressUseAfterScope;
678
104
        Opts.UseAfterReturn = CodeGenOpts.getSanitizeAddressUseAfterReturn();
679
104
        MPM.addPass(ModuleAddressSanitizerPass(
680
104
            Opts, UseGlobalGC, UseOdrIndicator, DestructorKind));
681
104
      }
682
39.7k
    };
683
19.8k
    ASanPass(SanitizerKind::Address, false);
684
19.8k
    ASanPass(SanitizerKind::KernelAddress, true);
685
686
39.7k
    auto HWASanPass = [&](SanitizerMask Mask, bool CompileKernel) {
687
39.7k
      if (LangOpts.Sanitize.has(Mask)) {
688
32
        bool Recover = CodeGenOpts.SanitizeRecover.has(Mask);
689
32
        MPM.addPass(HWAddressSanitizerPass(
690
32
            {CompileKernel, Recover,
691
32
             /*DisableOptimization=*/CodeGenOpts.OptimizationLevel == 0}));
692
32
      }
693
39.7k
    };
694
19.8k
    HWASanPass(SanitizerKind::HWAddress, false);
695
19.8k
    HWASanPass(SanitizerKind::KernelHWAddress, true);
696
697
19.8k
    if (LangOpts.Sanitize.has(SanitizerKind::DataFlow)) {
698
10
      MPM.addPass(DataFlowSanitizerPass(LangOpts.NoSanitizeFiles));
699
10
    }
700
19.8k
  });
701
19.8k
}
702
703
void EmitAssemblyHelper::RunOptimizationPipeline(
704
    BackendAction Action, std::unique_ptr<raw_pwrite_stream> &OS,
705
20.4k
    std::unique_ptr<llvm::ToolOutputFile> &ThinLinkOS) {
706
20.4k
  Optional<PGOOptions> PGOOpt;
707
708
20.4k
  if (CodeGenOpts.hasProfileIRInstr())
709
    // -fprofile-generate.
710
8
    PGOOpt = PGOOptions(CodeGenOpts.InstrProfileOutput.empty()
711
8
                            ? getDefaultProfileGenName()
712
8
                            : 
CodeGenOpts.InstrProfileOutput0
,
713
8
                        "", "", PGOOptions::IRInstr, PGOOptions::NoCSAction,
714
8
                        CodeGenOpts.DebugInfoForProfiling);
715
20.4k
  else if (CodeGenOpts.hasProfileIRUse()) {
716
    // -fprofile-use.
717
18
    auto CSAction = CodeGenOpts.hasProfileCSIRUse() ? 
PGOOptions::CSIRUse4
718
18
                                                    : 
PGOOptions::NoCSAction14
;
719
18
    PGOOpt = PGOOptions(CodeGenOpts.ProfileInstrumentUsePath, "",
720
18
                        CodeGenOpts.ProfileRemappingFile, PGOOptions::IRUse,
721
18
                        CSAction, CodeGenOpts.DebugInfoForProfiling);
722
20.4k
  } else if (!CodeGenOpts.SampleProfileFile.empty())
723
    // -fprofile-sample-use
724
11
    PGOOpt = PGOOptions(
725
11
        CodeGenOpts.SampleProfileFile, "", CodeGenOpts.ProfileRemappingFile,
726
11
        PGOOptions::SampleUse, PGOOptions::NoCSAction,
727
11
        CodeGenOpts.DebugInfoForProfiling, CodeGenOpts.PseudoProbeForProfiling);
728
20.3k
  else if (CodeGenOpts.PseudoProbeForProfiling)
729
    // -fpseudo-probe-for-profiling
730
4
    PGOOpt =
731
4
        PGOOptions("", "", "", PGOOptions::NoAction, PGOOptions::NoCSAction,
732
4
                   CodeGenOpts.DebugInfoForProfiling, true);
733
20.3k
  else if (CodeGenOpts.DebugInfoForProfiling)
734
    // -fdebug-info-for-profiling
735
4
    PGOOpt = PGOOptions("", "", "", PGOOptions::NoAction,
736
4
                        PGOOptions::NoCSAction, true);
737
738
  // Check to see if we want to generate a CS profile.
739
20.4k
  if (CodeGenOpts.hasProfileCSIRInstr()) {
740
6
    assert(!CodeGenOpts.hasProfileCSIRUse() &&
741
6
           "Cannot have both CSProfileUse pass and CSProfileGen pass at "
742
6
           "the same time");
743
6
    if (PGOOpt) {
744
3
      assert(PGOOpt->Action != PGOOptions::IRInstr &&
745
3
             PGOOpt->Action != PGOOptions::SampleUse &&
746
3
             "Cannot run CSProfileGen pass with ProfileGen or SampleUse "
747
3
             " pass");
748
3
      PGOOpt->CSProfileGenFile = CodeGenOpts.InstrProfileOutput.empty()
749
3
                                     ? 
getDefaultProfileGenName()1
750
3
                                     : 
CodeGenOpts.InstrProfileOutput2
;
751
3
      PGOOpt->CSAction = PGOOptions::CSIRInstr;
752
3
    } else
753
3
      PGOOpt = PGOOptions("",
754
3
                          CodeGenOpts.InstrProfileOutput.empty()
755
3
                              ? 
getDefaultProfileGenName()2
756
3
                              : 
CodeGenOpts.InstrProfileOutput1
,
757
3
                          "", PGOOptions::NoAction, PGOOptions::CSIRInstr,
758
3
                          CodeGenOpts.DebugInfoForProfiling);
759
6
  }
760
20.4k
  if (TM)
761
16.8k
    TM->setPGOOption(PGOOpt);
762
763
20.4k
  PipelineTuningOptions PTO;
764
20.4k
  PTO.LoopUnrolling = CodeGenOpts.UnrollLoops;
765
  // For historical reasons, loop interleaving is set to mirror setting for loop
766
  // unrolling.
767
20.4k
  PTO.LoopInterleaving = CodeGenOpts.UnrollLoops;
768
20.4k
  PTO.LoopVectorization = CodeGenOpts.VectorizeLoop;
769
20.4k
  PTO.SLPVectorization = CodeGenOpts.VectorizeSLP;
770
20.4k
  PTO.MergeFunctions = CodeGenOpts.MergeFunctions;
771
  // Only enable CGProfilePass when using integrated assembler, since
772
  // non-integrated assemblers don't recognize .cgprofile section.
773
20.4k
  PTO.CallGraphProfile = !CodeGenOpts.DisableIntegratedAS;
774
775
20.4k
  LoopAnalysisManager LAM;
776
20.4k
  FunctionAnalysisManager FAM;
777
20.4k
  CGSCCAnalysisManager CGAM;
778
20.4k
  ModuleAnalysisManager MAM;
779
780
20.4k
  bool DebugPassStructure = CodeGenOpts.DebugPass == "Structure";
781
20.4k
  PassInstrumentationCallbacks PIC;
782
20.4k
  PrintPassOptions PrintPassOpts;
783
20.4k
  PrintPassOpts.Indent = DebugPassStructure;
784
20.4k
  PrintPassOpts.SkipAnalyses = DebugPassStructure;
785
20.4k
  StandardInstrumentations SI(CodeGenOpts.DebugPassManager ||
786
20.4k
                                  
DebugPassStructure20.3k
,
787
20.4k
                              /*VerifyEach*/ false, PrintPassOpts);
788
20.4k
  SI.registerCallbacks(PIC, &FAM);
789
20.4k
  PassBuilder PB(TM.get(), PTO, PGOOpt, &PIC);
790
791
  // Enable verify-debuginfo-preserve-each for new PM.
792
20.4k
  DebugifyEachInstrumentation Debugify;
793
20.4k
  DebugInfoPerPass DebugInfoBeforePass;
794
20.4k
  if (CodeGenOpts.EnableDIPreservationVerify) {
795
0
    Debugify.setDebugifyMode(DebugifyMode::OriginalDebugInfo);
796
0
    Debugify.setDebugInfoBeforePass(DebugInfoBeforePass);
797
798
0
    if (!CodeGenOpts.DIBugsReportFilePath.empty())
799
0
      Debugify.setOrigDIVerifyBugsReportFilePath(
800
0
          CodeGenOpts.DIBugsReportFilePath);
801
0
    Debugify.registerCallbacks(PIC);
802
0
  }
803
  // Attempt to load pass plugins and register their callbacks with PB.
804
20.4k
  for (auto &PluginFN : CodeGenOpts.PassPlugins) {
805
0
    auto PassPlugin = PassPlugin::Load(PluginFN);
806
0
    if (PassPlugin) {
807
0
      PassPlugin->registerPassBuilderCallbacks(PB);
808
0
    } else {
809
0
      Diags.Report(diag::err_fe_unable_to_load_plugin)
810
0
          << PluginFN << toString(PassPlugin.takeError());
811
0
    }
812
0
  }
813
20.4k
#define HANDLE_EXTENSION(Ext)                                                  \
814
20.4k
  get##Ext##PluginInfo().RegisterPassBuilderCallbacks(PB);
815
20.4k
#include "llvm/Support/Extension.def"
816
817
  // Register the target library analysis directly and give it a customized
818
  // preset TLI.
819
20.4k
  std::unique_ptr<TargetLibraryInfoImpl> TLII(
820
20.4k
      createTLII(TargetTriple, CodeGenOpts));
821
20.4k
  FAM.registerPass([&] { return TargetLibraryAnalysis(*TLII); });
822
823
  // Register all the basic analyses with the managers.
824
20.4k
  PB.registerModuleAnalyses(MAM);
825
20.4k
  PB.registerCGSCCAnalyses(CGAM);
826
20.4k
  PB.registerFunctionAnalyses(FAM);
827
20.4k
  PB.registerLoopAnalyses(LAM);
828
20.4k
  PB.crossRegisterProxies(LAM, FAM, CGAM, MAM);
829
830
20.4k
  ModulePassManager MPM;
831
832
20.4k
  if (!CodeGenOpts.DisableLLVMPasses) {
833
    // Map our optimization levels into one of the distinct levels used to
834
    // configure the pipeline.
835
19.8k
    OptimizationLevel Level = mapToLevel(CodeGenOpts);
836
837
19.8k
    bool IsThinLTO = CodeGenOpts.PrepareForThinLTO;
838
19.8k
    bool IsLTO = CodeGenOpts.PrepareForLTO;
839
840
19.8k
    if (LangOpts.ObjCAutoRefCount) {
841
138
      PB.registerPipelineStartEPCallback(
842
138
          [](ModulePassManager &MPM, OptimizationLevel Level) {
843
138
            if (Level != OptimizationLevel::O0)
844
4
              MPM.addPass(
845
4
                  createModuleToFunctionPassAdaptor(ObjCARCExpandPass()));
846
138
          });
847
138
      PB.registerPipelineEarlySimplificationEPCallback(
848
138
          [](ModulePassManager &MPM, OptimizationLevel Level) {
849
138
            if (Level != OptimizationLevel::O0)
850
4
              MPM.addPass(ObjCARCAPElimPass());
851
138
          });
852
138
      PB.registerScalarOptimizerLateEPCallback(
853
138
          [](FunctionPassManager &FPM, OptimizationLevel Level) {
854
138
            if (Level != OptimizationLevel::O0)
855
4
              FPM.addPass(ObjCARCOptPass());
856
138
          });
857
138
    }
858
859
    // If we reached here with a non-empty index file name, then the index
860
    // file was empty and we are not performing ThinLTO backend compilation
861
    // (used in testing in a distributed build environment).
862
19.8k
    bool IsThinLTOPostLink = !CodeGenOpts.ThinLTOIndexFile.empty();
863
    // If so drop any the type test assume sequences inserted for whole program
864
    // vtables so that codegen doesn't complain.
865
19.8k
    if (IsThinLTOPostLink)
866
4
      PB.registerPipelineStartEPCallback(
867
4
          [](ModulePassManager &MPM, OptimizationLevel Level) {
868
4
            MPM.addPass(LowerTypeTestsPass(/*ExportSummary=*/nullptr,
869
4
                                           /*ImportSummary=*/nullptr,
870
4
                                           /*DropTypeTests=*/true));
871
4
          });
872
873
19.8k
    if (CodeGenOpts.InstrumentFunctions ||
874
19.8k
        
CodeGenOpts.InstrumentFunctionEntryBare19.8k
||
875
19.8k
        
CodeGenOpts.InstrumentFunctionsAfterInlining19.8k
||
876
19.8k
        
CodeGenOpts.InstrumentForProfiling19.8k
) {
877
68
      PB.registerPipelineStartEPCallback(
878
68
          [](ModulePassManager &MPM, OptimizationLevel Level) {
879
68
            MPM.addPass(createModuleToFunctionPassAdaptor(
880
68
                EntryExitInstrumenterPass(/*PostInlining=*/false)));
881
68
          });
882
68
      PB.registerOptimizerLastEPCallback(
883
68
          [](ModulePassManager &MPM, OptimizationLevel Level) {
884
68
            MPM.addPass(createModuleToFunctionPassAdaptor(
885
68
                EntryExitInstrumenterPass(/*PostInlining=*/true)));
886
68
          });
887
68
    }
888
889
    // Register callbacks to schedule sanitizer passes at the appropriate part
890
    // of the pipeline.
891
19.8k
    if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))
892
4
      PB.registerScalarOptimizerLateEPCallback(
893
4
          [](FunctionPassManager &FPM, OptimizationLevel Level) {
894
4
            FPM.addPass(BoundsCheckingPass());
895
4
          });
896
897
    // Don't add sanitizers if we are here from ThinLTO PostLink. That already
898
    // done on PreLink stage.
899
19.8k
    if (!IsThinLTOPostLink)
900
19.8k
      addSanitizers(TargetTriple, CodeGenOpts, LangOpts, PB);
901
902
19.8k
    if (Optional<GCOVOptions> Options = getGCOVOptions(CodeGenOpts, LangOpts))
903
16
      PB.registerPipelineStartEPCallback(
904
16
          [Options](ModulePassManager &MPM, OptimizationLevel Level) {
905
16
            MPM.addPass(GCOVProfilerPass(*Options));
906
16
          });
907
19.8k
    if (Optional<InstrProfOptions> Options =
908
19.8k
            getInstrProfOptions(CodeGenOpts, LangOpts))
909
117
      PB.registerPipelineStartEPCallback(
910
117
          [Options](ModulePassManager &MPM, OptimizationLevel Level) {
911
117
            MPM.addPass(InstrProfiling(*Options, false));
912
117
          });
913
914
19.8k
    if (CodeGenOpts.OptimizationLevel == 0) {
915
17.0k
      MPM = PB.buildO0DefaultPipeline(Level, IsLTO || 
IsThinLTO16.9k
);
916
17.0k
    } else 
if (2.87k
IsThinLTO2.87k
) {
917
31
      MPM = PB.buildThinLTOPreLinkDefaultPipeline(Level);
918
2.84k
    } else if (IsLTO) {
919
25
      MPM = PB.buildLTOPreLinkDefaultPipeline(Level);
920
2.81k
    } else {
921
2.81k
      MPM = PB.buildPerModuleDefaultPipeline(Level);
922
2.81k
    }
923
924
19.8k
    if (!CodeGenOpts.MemoryProfileOutput.empty()) {
925
4
      MPM.addPass(createModuleToFunctionPassAdaptor(MemProfilerPass()));
926
4
      MPM.addPass(ModuleMemProfilerPass());
927
4
    }
928
19.8k
  }
929
930
  // Add a verifier pass if requested. We don't have to do this if the action
931
  // requires code generation because there will already be a verifier pass in
932
  // the code-generation pipeline.
933
20.4k
  if (!actionRequiresCodeGen(Action) && 
CodeGenOpts.VerifyModule15.9k
)
934
15.9k
    MPM.addPass(VerifierPass());
935
936
20.4k
  switch (Action) {
937
554
  case Backend_EmitBC:
938
554
    if (CodeGenOpts.PrepareForThinLTO && 
!CodeGenOpts.DisableLLVMPasses41
) {
939
40
      if (!CodeGenOpts.ThinLinkBitcodeFile.empty()) {
940
1
        ThinLinkOS = openOutputFile(CodeGenOpts.ThinLinkBitcodeFile);
941
1
        if (!ThinLinkOS)
942
0
          return;
943
1
      }
944
40
      if (!TheModule->getModuleFlag("EnableSplitLTOUnit"))
945
39
        TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
946
39
                                 CodeGenOpts.EnableSplitLTOUnit);
947
40
      MPM.addPass(ThinLTOBitcodeWriterPass(*OS, ThinLinkOS ? 
&ThinLinkOS->os()1
948
40
                                                           : 
nullptr39
));
949
514
    } else {
950
      // Emit a module summary by default for Regular LTO except for ld64
951
      // targets
952
514
      bool EmitLTOSummary = shouldEmitRegularLTOSummary();
953
514
      if (EmitLTOSummary) {
954
15
        if (!TheModule->getModuleFlag("ThinLTO"))
955
15
          TheModule->addModuleFlag(Module::Error, "ThinLTO", uint32_t(0));
956
15
        if (!TheModule->getModuleFlag("EnableSplitLTOUnit"))
957
15
          TheModule->addModuleFlag(Module::Error, "EnableSplitLTOUnit",
958
15
                                   uint32_t(1));
959
15
      }
960
514
      MPM.addPass(
961
514
          BitcodeWriterPass(*OS, CodeGenOpts.EmitLLVMUseLists, EmitLTOSummary));
962
514
    }
963
554
    break;
964
965
15.1k
  case Backend_EmitLL:
966
15.1k
    MPM.addPass(PrintModulePass(*OS, "", CodeGenOpts.EmitLLVMUseLists));
967
15.1k
    break;
968
969
4.76k
  default:
970
4.76k
    break;
971
20.4k
  }
972
973
  // Now that we have all of the passes ready, run them.
974
20.4k
  {
975
20.4k
    PrettyStackTraceString CrashInfo("Optimizer");
976
20.4k
    llvm::TimeTraceScope TimeScope("Optimizer");
977
20.4k
    MPM.run(*TheModule, MAM);
978
20.4k
  }
979
20.4k
}
980
981
void EmitAssemblyHelper::RunCodegenPipeline(
982
    BackendAction Action, std::unique_ptr<raw_pwrite_stream> &OS,
983
20.4k
    std::unique_ptr<llvm::ToolOutputFile> &DwoOS) {
984
  // We still use the legacy PM to run the codegen pipeline since the new PM
985
  // does not work with the codegen pipeline.
986
  // FIXME: make the new PM work with the codegen pipeline.
987
20.4k
  legacy::PassManager CodeGenPasses;
988
989
  // Append any output we need to the pass manager.
990
20.4k
  switch (Action) {
991
500
  case Backend_EmitAssembly:
992
508
  case Backend_EmitMCNull:
993
4.47k
  case Backend_EmitObj:
994
4.47k
    CodeGenPasses.add(
995
4.47k
        createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
996
4.47k
    if (!CodeGenOpts.SplitDwarfOutput.empty()) {
997
6
      DwoOS = openOutputFile(CodeGenOpts.SplitDwarfOutput);
998
6
      if (!DwoOS)
999
0
        return;
1000
6
    }
1001
4.47k
    if (!AddEmitPasses(CodeGenPasses, Action, *OS,
1002
4.47k
                       DwoOS ? 
&DwoOS->os()6
:
nullptr4.47k
))
1003
      // FIXME: Should we handle this error differently?
1004
0
      return;
1005
4.47k
    break;
1006
15.9k
  default:
1007
15.9k
    return;
1008
20.4k
  }
1009
1010
4.47k
  {
1011
4.47k
    PrettyStackTraceString CrashInfo("Code generation");
1012
4.47k
    llvm::TimeTraceScope TimeScope("CodeGenPasses");
1013
4.47k
    CodeGenPasses.run(*TheModule);
1014
4.47k
  }
1015
4.47k
}
1016
1017
void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
1018
20.4k
                                      std::unique_ptr<raw_pwrite_stream> OS) {
1019
20.4k
  TimeRegion Region(CodeGenOpts.TimePasses ? 
&CodeGenerationTime13
:
nullptr20.4k
);
1020
20.4k
  setCommandLineOpts(CodeGenOpts);
1021
1022
20.4k
  bool RequiresCodeGen = actionRequiresCodeGen(Action);
1023
20.4k
  CreateTargetMachine(RequiresCodeGen);
1024
1025
20.4k
  if (RequiresCodeGen && 
!TM4.47k
)
1026
1
    return;
1027
20.4k
  if (TM)
1028
16.8k
    TheModule->setDataLayout(TM->createDataLayout());
1029
1030
  // Before executing passes, print the final values of the LLVM options.
1031
20.4k
  cl::PrintOptionValues();
1032
1033
20.4k
  std::unique_ptr<llvm::ToolOutputFile> ThinLinkOS, DwoOS;
1034
20.4k
  RunOptimizationPipeline(Action, OS, ThinLinkOS);
1035
20.4k
  RunCodegenPipeline(Action, OS, DwoOS);
1036
1037
20.4k
  if (ThinLinkOS)
1038
1
    ThinLinkOS->keep();
1039
20.4k
  if (DwoOS)
1040
6
    DwoOS->keep();
1041
20.4k
}
1042
1043
static void runThinLTOBackend(
1044
    DiagnosticsEngine &Diags, ModuleSummaryIndex *CombinedIndex, Module *M,
1045
    const HeaderSearchOptions &HeaderOpts, const CodeGenOptions &CGOpts,
1046
    const clang::TargetOptions &TOpts, const LangOptions &LOpts,
1047
    std::unique_ptr<raw_pwrite_stream> OS, std::string SampleProfile,
1048
45
    std::string ProfileRemapping, BackendAction Action) {
1049
45
  StringMap<DenseMap<GlobalValue::GUID, GlobalValueSummary *>>
1050
45
      ModuleToDefinedGVSummaries;
1051
45
  CombinedIndex->collectDefinedGVSummariesPerModule(ModuleToDefinedGVSummaries);
1052
1053
45
  setCommandLineOpts(CGOpts);
1054
1055
  // We can simply import the values mentioned in the combined index, since
1056
  // we should only invoke this using the individual indexes written out
1057
  // via a WriteIndexesThinBackend.
1058
45
  FunctionImporter::ImportMapTy ImportList;
1059
45
  if (!lto::initImportList(*M, *CombinedIndex, ImportList))
1060
0
    return;
1061
1062
45
  auto AddStream = [&](size_t Task) {
1063
26
    return std::make_unique<CachedFileStream>(std::move(OS),
1064
26
                                              CGOpts.ObjectFilenameForDebug);
1065
26
  };
1066
45
  lto::Config Conf;
1067
45
  if (CGOpts.SaveTempsFilePrefix != "") {
1068
5
    if (Error E = Conf.addSaveTemps(CGOpts.SaveTempsFilePrefix + ".",
1069
5
                                    /* UseInputModulePath */ false)) {
1070
0
      handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
1071
0
        errs() << "Error setting up ThinLTO save-temps: " << EIB.message()
1072
0
               << '\n';
1073
0
      });
1074
0
    }
1075
5
  }
1076
45
  Conf.CPU = TOpts.CPU;
1077
45
  Conf.CodeModel = getCodeModel(CGOpts);
1078
45
  Conf.MAttrs = TOpts.Features;
1079
45
  Conf.RelocModel = CGOpts.RelocationModel;
1080
45
  Conf.CGOptLevel = getCGOptLevel(CGOpts);
1081
45
  Conf.OptLevel = CGOpts.OptimizationLevel;
1082
45
  initTargetOptions(Diags, Conf.Options, CGOpts, TOpts, LOpts, HeaderOpts);
1083
45
  Conf.SampleProfile = std::move(SampleProfile);
1084
45
  Conf.PTO.LoopUnrolling = CGOpts.UnrollLoops;
1085
  // For historical reasons, loop interleaving is set to mirror setting for loop
1086
  // unrolling.
1087
45
  Conf.PTO.LoopInterleaving = CGOpts.UnrollLoops;
1088
45
  Conf.PTO.LoopVectorization = CGOpts.VectorizeLoop;
1089
45
  Conf.PTO.SLPVectorization = CGOpts.VectorizeSLP;
1090
  // Only enable CGProfilePass when using integrated assembler, since
1091
  // non-integrated assemblers don't recognize .cgprofile section.
1092
45
  Conf.PTO.CallGraphProfile = !CGOpts.DisableIntegratedAS;
1093
1094
  // Context sensitive profile.
1095
45
  if (CGOpts.hasProfileCSIRInstr()) {
1096
1
    Conf.RunCSIRInstr = true;
1097
1
    Conf.CSIRProfile = std::move(CGOpts.InstrProfileOutput);
1098
44
  } else if (CGOpts.hasProfileCSIRUse()) {
1099
2
    Conf.RunCSIRInstr = false;
1100
2
    Conf.CSIRProfile = std::move(CGOpts.ProfileInstrumentUsePath);
1101
2
  }
1102
1103
45
  Conf.ProfileRemapping = std::move(ProfileRemapping);
1104
45
  Conf.DebugPassManager = CGOpts.DebugPassManager;
1105
45
  Conf.RemarksWithHotness = CGOpts.DiagnosticsWithHotness;
1106
45
  Conf.RemarksFilename = CGOpts.OptRecordFile;
1107
45
  Conf.RemarksPasses = CGOpts.OptRecordPasses;
1108
45
  Conf.RemarksFormat = CGOpts.OptRecordFormat;
1109
45
  Conf.SplitDwarfFile = CGOpts.SplitDwarfFile;
1110
45
  Conf.SplitDwarfOutput = CGOpts.SplitDwarfOutput;
1111
45
  switch (Action) {
1112
0
  case Backend_EmitNothing:
1113
0
    Conf.PreCodeGenModuleHook = [](size_t Task, const Module &Mod) {
1114
0
      return false;
1115
0
    };
1116
0
    break;
1117
17
  case Backend_EmitLL:
1118
17
    Conf.PreCodeGenModuleHook = [&](size_t Task, const Module &Mod) {
1119
17
      M->print(*OS, nullptr, CGOpts.EmitLLVMUseLists);
1120
17
      return false;
1121
17
    };
1122
17
    break;
1123
1
  case Backend_EmitBC:
1124
1
    Conf.PreCodeGenModuleHook = [&](size_t Task, const Module &Mod) {
1125
1
      WriteBitcodeToFile(*M, *OS, CGOpts.EmitLLVMUseLists);
1126
1
      return false;
1127
1
    };
1128
1
    break;
1129
27
  default:
1130
27
    Conf.CGFileType = getCodeGenFileType(Action);
1131
27
    break;
1132
45
  }
1133
45
  if (Error E =
1134
45
          thinBackend(Conf, -1, AddStream, *M, *CombinedIndex, ImportList,
1135
45
                      ModuleToDefinedGVSummaries[M->getModuleIdentifier()],
1136
45
                      /* ModuleMap */ nullptr, CGOpts.CmdArgs)) {
1137
1
    handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
1138
1
      errs() << "Error running ThinLTO backend: " << EIB.message() << '\n';
1139
1
    });
1140
1
  }
1141
45
}
1142
1143
void clang::EmitBackendOutput(DiagnosticsEngine &Diags,
1144
                              const HeaderSearchOptions &HeaderOpts,
1145
                              const CodeGenOptions &CGOpts,
1146
                              const clang::TargetOptions &TOpts,
1147
                              const LangOptions &LOpts,
1148
                              StringRef TDesc, Module *M,
1149
                              BackendAction Action,
1150
20.4k
                              std::unique_ptr<raw_pwrite_stream> OS) {
1151
1152
20.4k
  llvm::TimeTraceScope TimeScope("Backend");
1153
1154
20.4k
  std::unique_ptr<llvm::Module> EmptyModule;
1155
20.4k
  if (!CGOpts.ThinLTOIndexFile.empty()) {
1156
    // If we are performing a ThinLTO importing compile, load the function index
1157
    // into memory and pass it into runThinLTOBackend, which will run the
1158
    // function importer and invoke LTO passes.
1159
50
    std::unique_ptr<ModuleSummaryIndex> CombinedIndex;
1160
50
    if (Error E = llvm::getModuleSummaryIndexForFile(
1161
50
                      CGOpts.ThinLTOIndexFile,
1162
50
                      /*IgnoreEmptyThinLTOIndexFile*/ true)
1163
50
                      .moveInto(CombinedIndex)) {
1164
1
      logAllUnhandledErrors(std::move(E), errs(),
1165
1
                            "Error loading index file '" +
1166
1
                            CGOpts.ThinLTOIndexFile + "': ");
1167
1
      return;
1168
1
    }
1169
1170
    // A null CombinedIndex means we should skip ThinLTO compilation
1171
    // (LLVM will optionally ignore empty index files, returning null instead
1172
    // of an error).
1173
49
    if (CombinedIndex) {
1174
46
      if (!CombinedIndex->skipModuleByDistributedBackend()) {
1175
45
        runThinLTOBackend(Diags, CombinedIndex.get(), M, HeaderOpts, CGOpts,
1176
45
                          TOpts, LOpts, std::move(OS), CGOpts.SampleProfileFile,
1177
45
                          CGOpts.ProfileRemappingFile, Action);
1178
45
        return;
1179
45
      }
1180
      // Distributed indexing detected that nothing from the module is needed
1181
      // for the final linking. So we can skip the compilation. We sill need to
1182
      // output an empty object file to make sure that a linker does not fail
1183
      // trying to read it. Also for some features, like CFI, we must skip
1184
      // the compilation as CombinedIndex does not contain all required
1185
      // information.
1186
1
      EmptyModule = std::make_unique<llvm::Module>("empty", M->getContext());
1187
1
      EmptyModule->setTargetTriple(M->getTargetTriple());
1188
1
      M = EmptyModule.get();
1189
1
    }
1190
49
  }
1191
1192
20.4k
  EmitAssemblyHelper AsmHelper(Diags, HeaderOpts, CGOpts, TOpts, LOpts, M);
1193
20.4k
  AsmHelper.EmitAssembly(Action, std::move(OS));
1194
1195
  // Verify clang's TargetInfo DataLayout against the LLVM TargetMachine's
1196
  // DataLayout.
1197
20.4k
  if (AsmHelper.TM) {
1198
16.8k
    std::string DLDesc = M->getDataLayout().getStringRepresentation();
1199
16.8k
    if (DLDesc != TDesc) {
1200
0
      unsigned DiagID = Diags.getCustomDiagID(
1201
0
          DiagnosticsEngine::Error, "backend data layout '%0' does not match "
1202
0
                                    "expected target description '%1'");
1203
0
      Diags.Report(DiagID) << DLDesc << TDesc;
1204
0
    }
1205
16.8k
  }
1206
20.4k
}
1207
1208
// With -fembed-bitcode, save a copy of the llvm IR as data in the
1209
// __LLVM,__bitcode section.
1210
void clang::EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts,
1211
20.1k
                         llvm::MemoryBufferRef Buf) {
1212
20.1k
  if (CGOpts.getEmbedBitcode() == CodeGenOptions::Embed_Off)
1213
20.1k
    return;
1214
22
  llvm::embedBitcodeInModule(
1215
22
      *M, Buf, CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Marker,
1216
22
      CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Bitcode,
1217
22
      CGOpts.CmdArgs);
1218
22
}
1219
1220
void clang::EmbedObject(llvm::Module *M, const CodeGenOptions &CGOpts,
1221
36.0k
                        DiagnosticsEngine &Diags) {
1222
36.0k
  if (CGOpts.OffloadObjects.empty())
1223
36.0k
    return;
1224
1225
3
  
for (StringRef OffloadObject : CGOpts.OffloadObjects)2
{
1226
3
    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ObjectOrErr =
1227
3
        llvm::MemoryBuffer::getFileOrSTDIN(OffloadObject);
1228
3
    if (std::error_code EC = ObjectOrErr.getError()) {
1229
0
      auto DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1230
0
                                          "could not open '%0' for embedding");
1231
0
      Diags.Report(DiagID) << OffloadObject;
1232
0
      return;
1233
0
    }
1234
1235
3
    llvm::embedBufferInModule(*M, **ObjectOrErr, ".llvm.offloading",
1236
3
                              Align(object::OffloadBinary::getAlignment()));
1237
3
  }
1238
2
}