Author: Timm Bäder Date: 2024-05-22T13:12:48+02:00 New Revision: f68548135b8f9a02beac842646ab89bcaad9d400
URL: https://github.com/llvm/llvm-project/commit/f68548135b8f9a02beac842646ab89bcaad9d400 DIFF: https://github.com/llvm/llvm-project/commit/f68548135b8f9a02beac842646ab89bcaad9d400.diff LOG: [clang][Interp] Fix checking unions for initialization Added: clang/test/AST/Interp/unions.cpp Modified: clang/lib/AST/Interp/EvaluationResult.cpp Removed: ################################################################################ diff --git a/clang/lib/AST/Interp/EvaluationResult.cpp b/clang/lib/AST/Interp/EvaluationResult.cpp index e92d686c724cc..79f222ce2b30c 100644 --- a/clang/lib/AST/Interp/EvaluationResult.cpp +++ b/clang/lib/AST/Interp/EvaluationResult.cpp @@ -115,6 +115,10 @@ static bool CheckFieldsInitialized(InterpState &S, SourceLocation Loc, DiagnoseUninitializedSubobject(S, Loc, F.Decl); Result = false; } + + // Only the first member of a union needs to be initialized. + if (R->isUnion()) + break; } // Check Fields in all bases diff --git a/clang/test/AST/Interp/unions.cpp b/clang/test/AST/Interp/unions.cpp new file mode 100644 index 0000000000000..08ca39c3cb089 --- /dev/null +++ b/clang/test/AST/Interp/unions.cpp @@ -0,0 +1,14 @@ +// RUN: %clang_cc1 -fexperimental-new-constant-interpreter -verify=expected,both %s +// RUN: %clang_cc1 -verify=ref,both %s + +// both-no-diagnostics + +union U { + int a; + int b; +}; + +constexpr U a = {12}; +static_assert(a.a == 12, ""); + + _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
