Address review comments for r167358: explicitly check for CK_BitCast instead of

checking against a blacklist.

llvm-svn: 167362

clang/lib/Sema/SemaChecking.cpp

@@ -6190,8 +6190,7 @@ void Sema::CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
     // Skip implicit cast of pointer to `void *' (as a function argument).
     if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgumentExpr))
       if (ICE->getType()->isVoidPointerType() &&
-          ICE->getCastKind() != CK_NullToPointer &&
-          ICE->getCastKind() != CK_NullToMemberPointer)
+          ICE->getCastKind() == CK_BitCast)
         ArgumentExpr = ICE->getSubExpr();
   }
   QualType ArgumentType = ArgumentExpr->getType();