diff options
| -rw-r--r-- | clang/lib/StaticAnalyzer/Core/ExprEngine.cpp | 6 | ||||
| -rw-r--r-- | clang/test/Analysis/template-param-objects.cpp | 33 |
2 files changed, 39 insertions, 0 deletions
diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp index 19149d079822..ab65612bce90 100644 --- a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp +++ b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp @@ -2839,6 +2839,12 @@ void ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D, return; } + if (const auto *TPO = dyn_cast<TemplateParamObjectDecl>(D)) { + // FIXME: We should meaningfully implement this. + (void)TPO; + return; + } + llvm_unreachable("Support for this Decl not implemented."); } diff --git a/clang/test/Analysis/template-param-objects.cpp b/clang/test/Analysis/template-param-objects.cpp new file mode 100644 index 000000000000..dde95fa62cb6 --- /dev/null +++ b/clang/test/Analysis/template-param-objects.cpp @@ -0,0 +1,33 @@ +// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection \ +// RUN: -analyzer-config eagerly-assume=false -std=c++20 -verify %s + +template <class T> void clang_analyzer_dump(T); +void clang_analyzer_eval(bool); + +struct Box { + int value; +}; +bool operator ==(Box lhs, Box rhs) { + return lhs.value == rhs.value; +} +template <Box V> void dumps() { + clang_analyzer_dump(V); // expected-warning {{lazyCompoundVal}} + clang_analyzer_dump(&V); // expected-warning {{Unknown}} + clang_analyzer_dump(V.value); // expected-warning {{Unknown}} FIXME: It should be '6 S32b'. + clang_analyzer_dump(&V.value); // expected-warning {{Unknown}} +} +template void dumps<Box{6}>(); + +// [temp.param].7.3.2: +// "All such template parameters in the program of the same type with the +// same value denote the same template parameter object." +template <Box A1, Box A2, Box B1, Box B2> void stable_addresses() { + clang_analyzer_eval(&A1 == &A2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE. + clang_analyzer_eval(&B1 == &B2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE. + clang_analyzer_eval(&A1 == &B2); // expected-warning {{UNKNOWN}} FIXME: It should be FALSE. + + clang_analyzer_eval(A1 == A2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE. + clang_analyzer_eval(B1 == B2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE. + clang_analyzer_eval(A1 == B2); // expected-warning {{UNKNOWN}} FIXME: It should be FALSE. +} +template void stable_addresses<Box{1}, Box{1}, Box{2}, Box{2}>(); |