Fix warning on qualified typedef with 'unused' attribute, from Jason Haslam!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163874 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 92780d98cd..7903ed0e30 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -1264,7 +1264,7 @@ static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) {
     QualType Ty = VD->getType();
 
     // Only look at the outermost level of typedef.
-    if (const TypedefType *TT = dyn_cast<TypedefType>(Ty)) {
+    if (const TypedefType *TT = Ty->getAs<TypedefType>()) {
       if (TT->getDecl()->hasAttr<UnusedAttr>())
         return false;
     }