Use CK_BitCast for member function pointer casts. Fixes PR5138.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84438 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprAgg.cpp b/lib/CodeGen/CGExprAgg.cpp
index 88fdb54..066029f 100644
--- a/lib/CodeGen/CGExprAgg.cpp
+++ b/lib/CodeGen/CGExprAgg.cpp
@@ -215,6 +215,12 @@
     break;
   }
       
+  case CastExpr::CK_BitCast: {
+    // This must be a member function pointer cast.
+    Visit(E->getSubExpr());
+    break;
+  }
+
   case CastExpr::CK_BaseToDerivedMemberPointer: {
     QualType SrcType = E->getSubExpr()->getType();
     
diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index 7f540c3..fc3748c 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -542,7 +542,11 @@
         return CS;
       }          
     }
-        
+
+    case CastExpr::CK_BitCast: 
+      // This must be a member function pointer cast.
+      return Visit(E->getSubExpr());
+
     default: {
       // FIXME: This should be handled by the CK_NoOp cast kind.
       // Explicit and implicit no-op casts