Author: martong Date: Tue Mar 19 07:04:50 2019 New Revision: 356455 URL: http://llvm.org/viewvc/llvm-project?rev=356455&view=rev Log: [ASTImporter] Fix redecl failures of FunctionTemplateSpec
Summary: Redecl chains of function template specializations are not handled well currently. We want to handle them similarly to functions, i.e. try to keep the structure of the original AST as much as possible. The aim is to not squash a prototype with a definition, rather we create both and put them in a redecl chain. Reviewers: a_sidorin, shafik, a.sidorin Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D58668 Modified: cfe/trunk/lib/AST/ASTImporter.cpp cfe/trunk/unittests/AST/ASTImporterTest.cpp Modified: cfe/trunk/lib/AST/ASTImporter.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTImporter.cpp?rev=356455&r1=356454&r2=356455&view=diff ============================================================================== --- cfe/trunk/lib/AST/ASTImporter.cpp (original) +++ cfe/trunk/lib/AST/ASTImporter.cpp Tue Mar 19 07:04:50 2019 @@ -290,6 +290,16 @@ namespace clang { ToD->setImplicit(); } + // Check if we have found an existing definition. Returns with that + // definition if yes, otherwise returns null. + Decl *FindAndMapDefinition(FunctionDecl *D, FunctionDecl *FoundFunction) { + const FunctionDecl *Definition = nullptr; + if (D->doesThisDeclarationHaveABody() && + FoundFunction->hasBody(Definition)) + return Importer.MapImported(D, const_cast<FunctionDecl *>(Definition)); + return nullptr; + } + public: explicit ASTNodeImporter(ASTImporter &Importer) : Importer(Importer) {} @@ -2973,8 +2983,8 @@ ExpectedDecl ASTNodeImporter::VisitFunct if (!FoundFunctionOrErr) return FoundFunctionOrErr.takeError(); if (FunctionDecl *FoundFunction = *FoundFunctionOrErr) { - if (D->doesThisDeclarationHaveABody() && FoundFunction->hasBody()) - return Importer.MapImported(D, FoundFunction); + if (Decl *Def = FindAndMapDefinition(D, FoundFunction)) + return Def; FoundByLookup = FoundFunction; } } @@ -2993,11 +3003,8 @@ ExpectedDecl ASTNodeImporter::VisitFunct continue; if (IsStructuralMatch(D, FoundFunction)) { - const FunctionDecl *Definition = nullptr; - if (D->doesThisDeclarationHaveABody() && - FoundFunction->hasBody(Definition)) - return Importer.MapImported(D, - const_cast<FunctionDecl *>(Definition)); + if (Decl *Def = FindAndMapDefinition(D, FoundFunction)) + return Def; FoundByLookup = FoundFunction; break; } Modified: cfe/trunk/unittests/AST/ASTImporterTest.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/unittests/AST/ASTImporterTest.cpp?rev=356455&r1=356454&r2=356455&view=diff ============================================================================== --- cfe/trunk/unittests/AST/ASTImporterTest.cpp (original) +++ cfe/trunk/unittests/AST/ASTImporterTest.cpp Tue Mar 19 07:04:50 2019 @@ -3978,6 +3978,45 @@ struct RedeclChain : ASTImporterOptionSp std::string getDefinition() { return TypeParam::Definition; } BindableMatcher<Decl> getPattern() const { return TypeParam().getPattern(); } + void CheckPreviousDecl(Decl *Prev, Decl *Current) { + ASSERT_NE(Prev, Current); + ASSERT_EQ(&Prev->getASTContext(), &Current->getASTContext()); + EXPECT_EQ(Prev->getCanonicalDecl(), Current->getCanonicalDecl()); + + // Templates. + if (auto *PrevT = dyn_cast<TemplateDecl>(Prev)) { + EXPECT_EQ(Current->getPreviousDecl(), Prev); + auto *CurrentT = cast<TemplateDecl>(Current); + ASSERT_TRUE(PrevT->getTemplatedDecl()); + ASSERT_TRUE(CurrentT->getTemplatedDecl()); + EXPECT_EQ(CurrentT->getTemplatedDecl()->getPreviousDecl(), + PrevT->getTemplatedDecl()); + return; + } + + // Specializations. + if (auto *PrevF = dyn_cast<FunctionDecl>(Prev)) { + if (PrevF->getTemplatedKind() == + FunctionDecl::TK_FunctionTemplateSpecialization) { + // There may be a hidden fwd spec decl before a spec decl. + // In that case the previous visible decl can be reached through that + // invisible one. + EXPECT_THAT(Prev, testing::AnyOf( + Current->getPreviousDecl(), + Current->getPreviousDecl()->getPreviousDecl())); + auto *ToTU = Prev->getTranslationUnitDecl(); + auto *TemplateD = FirstDeclMatcher<FunctionTemplateDecl>().match( + ToTU, functionTemplateDecl()); + auto *FirstSpecD = *(TemplateD->spec_begin()); + EXPECT_EQ(FirstSpecD->getCanonicalDecl(), PrevF->getCanonicalDecl()); + return; + } + } + + // The rest: Classes, Functions, etc. + EXPECT_EQ(Current->getPreviousDecl(), Prev); + } + void TypedTest_PrototypeShouldBeImportedAsAPrototypeWhenThereIsNoDefinition() { Decl *FromTU = getTuDecl(getPrototype(), Lang_CXX); @@ -4030,14 +4069,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(Imported1 == To1); EXPECT_FALSE(To0->isThisDeclarationADefinition()); EXPECT_FALSE(To1->isThisDeclarationADefinition()); - EXPECT_EQ(To1->getPreviousDecl(), To0); - if (auto *ToT0 = dyn_cast<TemplateDecl>(To0)) { - auto *ToT1 = cast<TemplateDecl>(To1); - ASSERT_TRUE(ToT0->getTemplatedDecl()); - ASSERT_TRUE(ToT1->getTemplatedDecl()); - EXPECT_EQ(ToT1->getTemplatedDecl()->getPreviousDecl(), - ToT0->getTemplatedDecl()); - } + + CheckPreviousDecl(To0, To1); } void TypedTest_ImportDefinitionAfterImportedPrototype() { @@ -4059,14 +4092,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(ImportedDef == ToDef); EXPECT_FALSE(ToProto->isThisDeclarationADefinition()); EXPECT_TRUE(ToDef->isThisDeclarationADefinition()); - EXPECT_EQ(ToDef->getPreviousDecl(), ToProto); - if (auto *ToProtoT = dyn_cast<TemplateDecl>(ToProto)) { - auto *ToDefT = cast<TemplateDecl>(ToDef); - ASSERT_TRUE(ToProtoT->getTemplatedDecl()); - ASSERT_TRUE(ToDefT->getTemplatedDecl()); - EXPECT_EQ(ToDefT->getTemplatedDecl()->getPreviousDecl(), - ToProtoT->getTemplatedDecl()); - } + + CheckPreviousDecl(ToProto, ToDef); } void TypedTest_ImportPrototypeAfterImportedDefinition() { @@ -4088,14 +4115,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(ImportedProto == ToProto); EXPECT_TRUE(ToDef->isThisDeclarationADefinition()); EXPECT_FALSE(ToProto->isThisDeclarationADefinition()); - EXPECT_EQ(ToProto->getPreviousDecl(), ToDef); - if (auto *ToDefT = dyn_cast<TemplateDecl>(ToDef)) { - auto *ToProtoT = cast<TemplateDecl>(ToProto); - ASSERT_TRUE(ToDefT->getTemplatedDecl()); - ASSERT_TRUE(ToProtoT->getTemplatedDecl()); - EXPECT_EQ(ToProtoT->getTemplatedDecl()->getPreviousDecl(), - ToDefT->getTemplatedDecl()); - } + + CheckPreviousDecl(ToDef, ToProto); } void TypedTest_ImportPrototypes() { @@ -4117,27 +4138,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(Imported1 == To1); EXPECT_FALSE(To0->isThisDeclarationADefinition()); EXPECT_FALSE(To1->isThisDeclarationADefinition()); - EXPECT_EQ(To1->getPreviousDecl(), To0); - if (auto *ToT0 = dyn_cast<TemplateDecl>(To0)) { - auto *ToT1 = cast<TemplateDecl>(To1); - ASSERT_TRUE(ToT0->getTemplatedDecl()); - ASSERT_TRUE(ToT1->getTemplatedDecl()); - EXPECT_EQ(ToT1->getTemplatedDecl()->getPreviousDecl(), - ToT0->getTemplatedDecl()); - } - // Extra check for specializations. - // FIXME Add this check to other tests too (possibly factor out into a - // function), when they start to pass. - if (auto *From0F = dyn_cast<FunctionDecl>(From0)) { - auto *To0F = cast<FunctionDecl>(To0); - if (From0F->getTemplatedKind() == - FunctionDecl::TK_FunctionTemplateSpecialization) { - auto *TemplateD = FirstDeclMatcher<FunctionTemplateDecl>().match( - ToTU, functionTemplateDecl()); - auto *FirstSpecD = *(TemplateD->spec_begin()); - EXPECT_EQ(FirstSpecD->getCanonicalDecl(), To0F->getCanonicalDecl()); - } - } + + CheckPreviousDecl(To0, To1); } void TypedTest_ImportDefinitions() { @@ -4182,14 +4184,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(ImportedProto == ToProto); EXPECT_TRUE(ToDef->isThisDeclarationADefinition()); EXPECT_FALSE(ToProto->isThisDeclarationADefinition()); - EXPECT_EQ(ToProto->getPreviousDecl(), ToDef); - if (auto *ToDefT = dyn_cast<TemplateDecl>(ToDef)) { - auto *ToProtoT = cast<TemplateDecl>(ToProto); - ASSERT_TRUE(ToDefT->getTemplatedDecl()); - ASSERT_TRUE(ToProtoT->getTemplatedDecl()); - EXPECT_EQ(ToProtoT->getTemplatedDecl()->getPreviousDecl(), - ToDefT->getTemplatedDecl()); - } + + CheckPreviousDecl(ToDef, ToProto); } void TypedTest_ImportPrototypeThenDefinition() { @@ -4213,14 +4209,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(ImportedProto == ToProto); EXPECT_TRUE(ToDef->isThisDeclarationADefinition()); EXPECT_FALSE(ToProto->isThisDeclarationADefinition()); - EXPECT_EQ(ToDef->getPreviousDecl(), ToProto); - if (auto *ToDefT = dyn_cast<TemplateDecl>(ToDef)) { - auto *ToProtoT = cast<TemplateDecl>(ToProto); - ASSERT_TRUE(ToDefT->getTemplatedDecl()); - ASSERT_TRUE(ToProtoT->getTemplatedDecl()); - EXPECT_EQ(ToDefT->getTemplatedDecl()->getPreviousDecl(), - ToProtoT->getTemplatedDecl()); - } + + CheckPreviousDecl(ToProto, ToDef); } void TypedTest_WholeRedeclChainIsImportedAtOnce() { @@ -4262,7 +4252,8 @@ struct RedeclChain : ASTImporterOptionSp EXPECT_TRUE(DefinitionD->getPreviousDecl()); EXPECT_FALSE( DefinitionD->getPreviousDecl()->isThisDeclarationADefinition()); - EXPECT_EQ(DefinitionD->getPreviousDecl()->getPreviousDecl(), ProtoD); + + CheckPreviousDecl(ProtoD, DefinitionD->getPreviousDecl()); } }; @@ -4366,11 +4357,10 @@ ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE( ImportPrototypes) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplate, , ImportPrototypes) -// FIXME This does not pass, possible error with Spec import. -ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, - DISABLED_, ImportPrototypes) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplateSpec, , ImportPrototypes) +ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, , + ImportPrototypes) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, Function, , ImportDefinitions) @@ -4382,11 +4372,10 @@ ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE( ImportDefinitions) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplate, , ImportDefinitions) -// FIXME This does not pass, possible error with Spec import. -ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, - DISABLED_, ImportDefinitions) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplateSpec, , ImportDefinitions) +ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, , + ImportDefinitions) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, Function, , ImportDefinitionThenPrototype) @@ -4398,9 +4387,7 @@ ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE( ImportDefinitionThenPrototype) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplate, , ImportDefinitionThenPrototype) -// FIXME This does not pass, possible error with Spec import. -ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, - DISABLED_, +ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, , ImportDefinitionThenPrototype) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplateSpec, , ImportDefinitionThenPrototype) @@ -4415,9 +4402,7 @@ ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE( ImportPrototypeThenDefinition) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplate, , ImportPrototypeThenDefinition) -// FIXME This does not pass, possible error with Spec import. -ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, - DISABLED_, +ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, , ImportPrototypeThenDefinition) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, ClassTemplateSpec, , ImportPrototypeThenDefinition) @@ -4437,9 +4422,7 @@ ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE( ImportPrototypeThenProtoAndDefinition) ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplate, , ImportPrototypeThenProtoAndDefinition) -// FIXME This does not pass, possible error with Spec import. -ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, - DISABLED_, +ASTIMPORTER_INSTANTIATE_TYPED_TEST_CASE(RedeclChain, FunctionTemplateSpec, , ImportPrototypeThenProtoAndDefinition) INSTANTIATE_TEST_CASE_P(ParameterizedTests, RedeclChainFunction, _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits