A type- or value-dependent expression cannot use bitfield

promotion. Fixes <rdar://problem/8020920>.

llvm-svn: 104545

2 files changed, 16 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index d6e094e5b4a..aa98910f0ff 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -2729,6 +2729,9 @@ unsigned ASTContext::getIntegerRank(Type *T) {
 /// \returns the type this bit-field will promote to, or NULL if no
 /// promotion occurs.
 QualType ASTContext::isPromotableBitField(Expr *E) {
+  if (E->isTypeDependent() || E->isValueDependent())
+    return QualType();
+  
   FieldDecl *Field = E->getBitField();
   if (!Field)
     return QualType();
diff --git a/clang/test/SemaTemplate/enum-argument.cpp b/clang/test/SemaTemplate/enum-argument.cpp
index de89487bd58..7d237570678 100644
--- a/clang/test/SemaTemplate/enum-argument.cpp
+++ b/clang/test/SemaTemplate/enum-argument.cpp
@@ -21,3 +21,16 @@ struct X0 {
 };
 
 X0<int> x0i;
+
+namespace rdar8020920 {
+  template<typename T>
+  struct X {
+    enum { e0 = 32 };
+
+    unsigned long long bitfield : e0;
+
+    void f(int j) {
+      bitfield + j;
+    }
+  };
+}