Author: mgehre Date: Wed Aug 21 15:08:59 2019 New Revision: 369591 URL: http://llvm.org/viewvc/llvm-project?rev=369591&view=rev Log: [LifetimeAnalysis] Support more STL idioms (template forward declaration and DependentNameType)
Summary: This fixes inference of gsl::Pointer on std::set::iterator with libstdc++ (the typedef for iterator on the template is a DependentNameType - we can only put the gsl::Pointer attribute on the underlaying record after instantiation) inference of gsl::Pointer on std::vector::iterator with libc++ (the class was forward-declared, we added the gsl::Pointer on the canonical decl (the forward decl), and later when the template was instantiated, there was no attribute on the definition so it was not instantiated). and a duplicate gsl::Pointer on some class with libstdc++ (we first added an attribute to a incomplete instantiation, and then another was copied from the template definition when the instantiation was completed). We now add the attributes to all redeclarations to fix thos issues and make their usage easier. Reviewers: gribozavr Subscribers: Szelethus, xazax.hun, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D66179 Added: cfe/trunk/unittests/Sema/GslOwnerPointerInference.cpp Modified: cfe/trunk/lib/Sema/SemaAttr.cpp cfe/trunk/lib/Sema/SemaDeclAttr.cpp cfe/trunk/lib/Sema/SemaInit.cpp cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer-std.cpp cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer.cpp cfe/trunk/unittests/Sema/CMakeLists.txt Modified: cfe/trunk/lib/Sema/SemaAttr.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaAttr.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaAttr.cpp (original) +++ cfe/trunk/lib/Sema/SemaAttr.cpp Wed Aug 21 15:08:59 2019 @@ -88,13 +88,11 @@ void Sema::AddMsStructLayoutForRecord(Re template <typename Attribute> static void addGslOwnerPointerAttributeIfNotExisting(ASTContext &Context, CXXRecordDecl *Record) { - CXXRecordDecl *Canonical = Record->getCanonicalDecl(); - if (Canonical->hasAttr<OwnerAttr>() || Canonical->hasAttr<PointerAttr>()) + if (Record->hasAttr<OwnerAttr>() || Record->hasAttr<PointerAttr>()) return; - Canonical->addAttr(::new (Context) Attribute(SourceRange{}, Context, - /*DerefType*/ nullptr, - /*Spelling=*/0)); + for (Decl *Redecl : Record->redecls()) + Redecl->addAttr(Attribute::CreateImplicit(Context, /*DerefType=*/nullptr)); } void Sema::inferGslPointerAttribute(NamedDecl *ND, @@ -189,8 +187,7 @@ void Sema::inferGslOwnerPointerAttribute // Handle classes that directly appear in std namespace. if (Record->isInStdNamespace()) { - CXXRecordDecl *Canonical = Record->getCanonicalDecl(); - if (Canonical->hasAttr<OwnerAttr>() || Canonical->hasAttr<PointerAttr>()) + if (Record->hasAttr<OwnerAttr>() || Record->hasAttr<PointerAttr>()) return; if (StdOwners.count(Record->getName())) Modified: cfe/trunk/lib/Sema/SemaDeclAttr.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclAttr.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaDeclAttr.cpp (original) +++ cfe/trunk/lib/Sema/SemaDeclAttr.cpp Wed Aug 21 15:08:59 2019 @@ -4592,9 +4592,11 @@ static void handleLifetimeCategoryAttr(S } return; } - D->addAttr(::new (S.Context) - OwnerAttr(AL.getRange(), S.Context, DerefTypeLoc, - AL.getAttributeSpellingListIndex())); + for (Decl *Redecl : D->redecls()) { + Redecl->addAttr(::new (S.Context) + OwnerAttr(AL.getRange(), S.Context, DerefTypeLoc, + AL.getAttributeSpellingListIndex())); + } } else { if (checkAttrMutualExclusion<OwnerAttr>(S, D, AL)) return; @@ -4609,9 +4611,11 @@ static void handleLifetimeCategoryAttr(S } return; } - D->addAttr(::new (S.Context) - PointerAttr(AL.getRange(), S.Context, DerefTypeLoc, - AL.getAttributeSpellingListIndex())); + for (Decl *Redecl : D->redecls()) { + Redecl->addAttr(::new (S.Context) + PointerAttr(AL.getRange(), S.Context, DerefTypeLoc, + AL.getAttributeSpellingListIndex())); + } } } Modified: cfe/trunk/lib/Sema/SemaInit.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaInit.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaInit.cpp (original) +++ cfe/trunk/lib/Sema/SemaInit.cpp Wed Aug 21 15:08:59 2019 @@ -6561,7 +6561,7 @@ static void visitLocalsRetainedByReferen template <typename T> static bool isRecordWithAttr(QualType Type) { if (auto *RD = Type->getAsCXXRecordDecl()) - return RD->getCanonicalDecl()->hasAttr<T>(); + return RD->hasAttr<T>(); return false; } @@ -6672,7 +6672,7 @@ static void handleGslAnnotatedTypes(Indi if (auto *CCE = dyn_cast<CXXConstructExpr>(Call)) { const auto *Ctor = CCE->getConstructor(); - const CXXRecordDecl *RD = Ctor->getParent()->getCanonicalDecl(); + const CXXRecordDecl *RD = Ctor->getParent(); if (CCE->getNumArgs() > 0 && RD->hasAttr<PointerAttr>()) VisitPointerArg(Ctor->getParamDecl(0), CCE->getArgs()[0]); } Modified: cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp (original) +++ cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp Wed Aug 21 15:08:59 2019 @@ -552,6 +552,18 @@ void Sema::InstantiateAttrs(const MultiL continue; } + if (auto *A = dyn_cast<PointerAttr>(TmplAttr)) { + if (!New->hasAttr<PointerAttr>()) + New->addAttr(A->clone(Context)); + continue; + } + + if (auto *A = dyn_cast<OwnerAttr>(TmplAttr)) { + if (!New->hasAttr<OwnerAttr>()) + New->addAttr(A->clone(Context)); + continue; + } + assert(!TmplAttr->isPackExpansion()); if (TmplAttr->isLateParsed() && LateAttrs) { // Late parsed attributes must be instantiated and attached after the @@ -711,6 +723,9 @@ Decl *TemplateDeclInstantiator::Instanti SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef); + if (D->getUnderlyingType()->getAs<DependentNameType>()) + SemaRef.inferGslPointerAttribute(Typedef); + Typedef->setAccess(D->getAccess()); return Typedef; Modified: cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer-std.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer-std.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer-std.cpp (original) +++ cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer-std.cpp Wed Aug 21 15:08:59 2019 @@ -92,6 +92,59 @@ public: static_assert(sizeof(unordered_map<int>::iterator), ""); // Force instantiation. } // namespace inlinens +// The iterator typedef is a DependentNameType. +template <typename T> +class __unordered_multimap_iterator {}; +// CHECK: ClassTemplateDecl {{.*}} __unordered_multimap_iterator +// CHECK: ClassTemplateSpecializationDecl {{.*}} __unordered_multimap_iterator +// CHECK: TemplateArgument type 'int' +// CHECK: PointerAttr + +template <typename T> +class __unordered_multimap_base { +public: + using iterator = __unordered_multimap_iterator<T>; +}; + +template <typename T> +class unordered_multimap { + // CHECK: ClassTemplateDecl {{.*}} unordered_multimap + // CHECK: OwnerAttr {{.*}} + // CHECK: ClassTemplateSpecializationDecl {{.*}} unordered_multimap + // CHECK: OwnerAttr {{.*}} +public: + using _Mybase = __unordered_multimap_base<T>; + using iterator = typename _Mybase::iterator; +}; +static_assert(sizeof(unordered_multimap<int>::iterator), ""); // Force instantiation. + +// The canonical declaration of the iterator template is not its definition. +template <typename T> +class __unordered_multiset_iterator; +// CHECK: ClassTemplateDecl {{.*}} __unordered_multiset_iterator +// CHECK: PointerAttr +// CHECK: ClassTemplateSpecializationDecl {{.*}} __unordered_multiset_iterator +// CHECK: TemplateArgument type 'int' +// CHECK: PointerAttr + +template <typename T> +class __unordered_multiset_iterator { + // CHECK: ClassTemplateDecl {{.*}} prev {{.*}} __unordered_multiset_iterator + // CHECK: PointerAttr +}; + +template <typename T> +class unordered_multiset { + // CHECK: ClassTemplateDecl {{.*}} unordered_multiset + // CHECK: OwnerAttr {{.*}} + // CHECK: ClassTemplateSpecializationDecl {{.*}} unordered_multiset + // CHECK: OwnerAttr {{.*}} +public: + using iterator = __unordered_multiset_iterator<T>; +}; + +static_assert(sizeof(unordered_multiset<int>::iterator), ""); // Force instantiation. + // std::list has an implicit gsl::Owner attribute, // but explicit attributes take precedence. template <typename T> Modified: cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer.cpp?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer.cpp (original) +++ cfe/trunk/test/SemaCXX/attr-gsl-owner-pointer.cpp Wed Aug 21 15:08:59 2019 @@ -105,3 +105,20 @@ class [[gsl::Owner(int)]] AddTheSameLate class [[gsl::Owner(int)]] AddTheSameLater; // CHECK: CXXRecordDecl {{.*}} prev {{.*}} AddTheSameLater // CHECK: OwnerAttr {{.*}} int + +template <class T> +class [[gsl::Owner]] ForwardDeclared; +// CHECK: ClassTemplateDecl {{.*}} ForwardDeclared +// CHECK: OwnerAttr {{.*}} +// CHECK: ClassTemplateSpecializationDecl {{.*}} ForwardDeclared +// CHECK: TemplateArgument type 'int' +// CHECK: OwnerAttr {{.*}} + +template <class T> +class [[gsl::Owner]] ForwardDeclared { +// CHECK: ClassTemplateDecl {{.*}} ForwardDeclared +// CHECK: CXXRecordDecl {{.*}} ForwardDeclared definition +// CHECK: OwnerAttr {{.*}} +}; + +static_assert(sizeof(ForwardDeclared<int>), ""); // Force instantiation. Modified: cfe/trunk/unittests/Sema/CMakeLists.txt URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/unittests/Sema/CMakeLists.txt?rev=369591&r1=369590&r2=369591&view=diff ============================================================================== --- cfe/trunk/unittests/Sema/CMakeLists.txt (original) +++ cfe/trunk/unittests/Sema/CMakeLists.txt Wed Aug 21 15:08:59 2019 @@ -5,11 +5,13 @@ set(LLVM_LINK_COMPONENTS add_clang_unittest(SemaTests ExternalSemaSourceTest.cpp CodeCompleteTest.cpp + GslOwnerPointerInference.cpp ) clang_target_link_libraries(SemaTests PRIVATE clangAST + clangASTMatchers clangBasic clangFrontend clangParse Added: cfe/trunk/unittests/Sema/GslOwnerPointerInference.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/unittests/Sema/GslOwnerPointerInference.cpp?rev=369591&view=auto ============================================================================== --- cfe/trunk/unittests/Sema/GslOwnerPointerInference.cpp (added) +++ cfe/trunk/unittests/Sema/GslOwnerPointerInference.cpp Wed Aug 21 15:08:59 2019 @@ -0,0 +1,61 @@ +//== unittests/Sema/GslOwnerPointerInference.cpp - gsl::Owner/Pointer ========// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "../ASTMatchers/ASTMatchersTest.h" +#include "clang/ASTMatchers/ASTMatchers.h" +#include "gtest/gtest.h" + +namespace clang { +using namespace ast_matchers; + +TEST(OwnerPointer, BothHaveAttributes) { + EXPECT_TRUE(matches( + R"cpp( + template<class T> + class [[gsl::Owner]] C; + + template<class T> + class [[gsl::Owner]] C {}; + + C<int> c; + )cpp", + classTemplateSpecializationDecl(hasName("C"), hasAttr(clang::attr::Owner)))); +} + +TEST(OwnerPointer, ForwardDeclOnly) { + EXPECT_TRUE(matches( + R"cpp( + template<class T> + class [[gsl::Owner]] C; + + template<class T> + class C {}; + + C<int> c; + )cpp", + classTemplateSpecializationDecl(hasName("C"), hasAttr(clang::attr::Owner)))); +} + +TEST(OwnerPointer, LateForwardDeclOnly) { + EXPECT_TRUE(matches( + R"cpp( + template<class T> + class C; + + template<class T> + class C {}; + + template<class T> + class [[gsl::Owner]] C; + + C<int> c; + )cpp", + classTemplateSpecializationDecl(hasName("C"), hasAttr(clang::attr::Owner)))); +} + +} // namespace clang _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
