================
@@ -11432,6 +11433,22 @@ static QualType mergeEnumWithInteger(ASTContext
&Context, const EnumType *ET,
return {};
}
+QualType ASTContext::mergeTagTypes(QualType LHS, QualType RHS) {
+ // C17 and earlier and C++ disallow two tag definitions within the same TU
+ // from being compatible.
+ if (LangOpts.CPlusPlus || !LangOpts.C23)
+ return {};
+
+ // C23, on the other hand, requires the members to be "the same enough", so
+ // we use a structural equivalence check.
+ StructuralEquivalenceContext::NonEquivalentDeclSet NonEquivalentDecls;
+ StructuralEquivalenceContext Ctx(
+ getLangOpts(), *this, *this, NonEquivalentDecls,
+ StructuralEquivalenceKind::Default, /*StrictTypeSpelling*/ false,
+ /*Complain*/ false, /*ErrorOnTagTypeMismatch*/ true);
----------------
shafik wrote:
```suggestion
StructuralEquivalenceKind::Default, /*StrictTypeSpelling=*/false,
/*Complain=*/false, /*ErrorOnTagTypeMismatch*=/true);
```
https://github.com/llvm/llvm-project/pull/132939
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