PR2919: __builtin_types_compatible_p strips CRV qualifiers.
llvm-svn: 58079
diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 6e62d09..c20ca25 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -717,7 +717,13 @@
case TypesCompatibleExprClass: {
const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this);
Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType())));
- Result = Ctx.typesAreCompatible(TCE->getArgType1(), TCE->getArgType2());
+ // Per gcc docs "this built-in function ignores top level
+ // qualifiers". We need to use the canonical version to properly
+ // be able to strip CRV qualifiers from the type.
+ QualType T0 = Ctx.getCanonicalType(TCE->getArgType1());
+ QualType T1 = Ctx.getCanonicalType(TCE->getArgType2());
+ Result = Ctx.typesAreCompatible(T0.getUnqualifiedType(),
+ T1.getUnqualifiedType());
break;
}
case CallExprClass: {