diff options
Diffstat (limited to 'clang/unittests')
-rw-r--r-- | clang/unittests/Analysis/FlowSensitive/TransferTest.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp b/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp index cfbc64c..2ce8339 100644 --- a/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp +++ b/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp @@ -1637,6 +1637,49 @@ TEST(TransferTest, StructModeledFieldsWithAccessor) { }); } +TEST(TransferTest, StructModeledFieldsInTypeid) { + // Test that we model fields mentioned inside a `typeid()` expression only if + // that expression is potentially evaluated -- i.e. if the expression inside + // `typeid()` is a glvalue of polymorphic type (see + // `CXXTypeidExpr::isPotentiallyEvaluated()` and [expr.typeid]p3). + std::string Code = R"( + // Definitions needed for `typeid`. + namespace std { + class type_info {}; + class bad_typeid {}; + } // namespace std + + struct NonPolymorphic {}; + + struct Polymorphic { + virtual ~Polymorphic() = default; + }; + + struct S { + NonPolymorphic *NonPoly; + Polymorphic *Poly; + }; + + void target(S &s) { + typeid(*s.NonPoly); + typeid(*s.Poly); + // [[p]] + } + )"; + runDataflow( + Code, + [](const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &Results, + ASTContext &ASTCtx) { + const Environment &Env = getEnvironmentAtAnnotation(Results, "p"); + auto &SLoc = getLocForDecl<RecordStorageLocation>(ASTCtx, Env, "s"); + std::vector<const ValueDecl *> Fields; + for (auto [Field, _] : SLoc.children()) + Fields.push_back(Field); + EXPECT_THAT(Fields, + UnorderedElementsAre(findValueDecl(ASTCtx, "Poly"))); + }); +} + TEST(TransferTest, StructModeledFieldsWithComplicatedInheritance) { std::string Code = R"( struct Base1 { |