From: Abramo Bagnara <abramo.bagnara@gmail.com>
Date: Thu, 7 Oct 2010 21:20:44 +0000 (+0000)
Subject: Fixed cast to union with anonymous bitfields.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8c4bfe52e528d6c9810cfb0c59859bca9ddc41f0;p=clang

Fixed cast to union with anonymous bitfields.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@115979 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 9a3cb442a7..fec8cb9166 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -3986,7 +3986,8 @@ bool Sema::CheckCastTypes(SourceRange TyR, QualType castType, Expr *&castExpr,
       for (Field = RD->field_begin(), FieldEnd = RD->field_end();
            Field != FieldEnd; ++Field) {
         if (Context.hasSameUnqualifiedType(Field->getType(),
-                                           castExpr->getType())) {
+                                           castExpr->getType()) &&
+            !Field->isUnnamedBitfield()) {
           Diag(TyR.getBegin(), diag::ext_typecheck_cast_to_union)
             << castExpr->getSourceRange();
           break;
diff --git a/test/Sema/cast-to-union.c b/test/Sema/cast-to-union.c
index 6f275e8b50..c32964dfc0 100644
--- a/test/Sema/cast-to-union.c
+++ b/test/Sema/cast-to-union.c
@@ -1,11 +1,12 @@
 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
 
-union u { int i; };
+union u { int i; unsigned : 3; };
 void f(union u);
 
 void test(int x) {
   f((union u)x); // expected-warning {{C99 forbids casts to union type}}
   f((union u)&x); // expected-error {{cast to union type from type 'int *' not present in union}}
+  f((union u)2U); // expected-error {{cast to union type from type 'unsigned int' not present in union}}
 }
 
 union u w = (union u)2; // expected-warning {{C99 forbids casts to union type}}