[ProfileData] (clang) Use Error in InstrProf and Coverage

[vsk]

Summary

Sync up with "(llvm) Use Error in InstrProf and Coverage".

Depends on D19901.

[vsk]

• Handle an ECError we can see come out of opening a memory buffer.

lib/CodeGen/CodeGenModule.cpp

CodeGenModule::CodeGenModule(ASTContext &C, const HeaderSearchOptions &HSO,
   Block.GlobalUniqueCount = 0;
 
   if (C.getLangOpts().ObjC1)
     ObjCData.reset(new ObjCEntrypoints());
 
   if (CodeGenOpts.hasProfileClangUse()) {
     auto ReaderOrErr = llvm::IndexedInstrProfReader::create(
         CodeGenOpts.ProfileInstrumentUsePath);
-    if (std::error_code EC = ReaderOrErr.getError()) {
+    if (auto E = ReaderOrErr.takeError()) {
       unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
                                               "Could not read profile %0: %1");
+      llvm::handleAllErrors(std::move(E), [&](const llvm::InstrProfError &IPE) {
         getDiags().Report(DiagID) << CodeGenOpts.ProfileInstrumentUsePath
-                                << EC.message();
+                                  << IPE.message();
+      });
     } else
       PGOReader = std::move(ReaderOrErr.get());
   }
 
   // If coverage mapping generation is enabled, create the
   // CoverageMappingModuleGen object.
   if (CodeGenOpts.CoverageMapping)
     CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo));

lib/CodeGen/CodeGenPGO.cpp

if (PGOReader && haveRegionCounts()) {
     NumValueSites[ValueKind]++;
   }
 }
 
 void CodeGenPGO::loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
                                   bool IsInMainFile) {
   CGM.getPGOStats().addVisited(IsInMainFile);
   RegionCounts.clear();
-  llvm::ErrorOr<llvm::InstrProfRecord> RecordErrorOr =
+  llvm::Expected<llvm::InstrProfRecord> RecordExpected =
       PGOReader->getInstrProfRecord(FuncName, FunctionHash);
-  if (std::error_code EC = RecordErrorOr.getError()) {
-    if (EC == llvm::instrprof_error::unknown_function)
+  if (auto E = RecordExpected.takeError()) {
+    auto IPE = llvm::InstrProfError::take(std::move(E));
+    if (IPE == llvm::instrprof_error::unknown_function)
       CGM.getPGOStats().addMissing(IsInMainFile);
-    else if (EC == llvm::instrprof_error::hash_mismatch)
+    else if (IPE == llvm::instrprof_error::hash_mismatch)
       CGM.getPGOStats().addMismatched(IsInMainFile);
-    else if (EC == llvm::instrprof_error::malformed)
+    else if (IPE == llvm::instrprof_error::malformed)
       // TODO: Consider a more specific warning for this case.
       CGM.getPGOStats().addMismatched(IsInMainFile);
     return;
   }
   ProfRecord =
-      llvm::make_unique<llvm::InstrProfRecord>(std::move(RecordErrorOr.get()));
+      llvm::make_unique<llvm::InstrProfRecord>(std::move(RecordExpected.get()));
   RegionCounts = ProfRecord->Counts;
 }
 
 /// \brief Calculate what to divide by to scale weights.
 ///
 /// Given the maximum weight, calculate a divisor that will scale all the
 /// weights to strictly less than UINT32_MAX.
 static uint64_t calculateWeightScale(uint64_t MaxWeight) {

lib/Frontend/CompilerInvocation.cpp

static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
   Opts.setProfileInstr(Instrumentor);
 }
 
 // Set the profile kind using fprofile-instrument-use-path.
 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
                                   const std::string ProfileName) {
   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
   // In error, return silently and let Clang PGOUse report the error message.
-  if (ReaderOrErr.getError()) {
+  if (auto E = ReaderOrErr.takeError()) {
+    llvm::consumeError(std::move(E));
     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
     return;
   }
   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
     std::move(ReaderOrErr.get());
   if (PGOReader->isIRLevelProfile())
     Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
   else