fix test/CodeGen/tbaa-for-vptr.cpp: don't hardcode the index of metadata

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164928 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/tbaa-for-vptr.cpp

@@ -21,7 +21,7 @@ void CallFoo(A *a) {
   a->foo();
 }
 
-// CHECK: %{{.*}} = load {{.*}} !tbaa !0
-// CHECK: store {{.*}} !tbaa !0
-// CHECK: = metadata !{metadata !"vtable pointer", metadata !{{.*}}}
+// CHECK: %{{.*}} = load {{.*}} !tbaa ![[NUM:[0-9]+]]
+// CHECK: store {{.*}} !tbaa ![[NUM]]
+// CHECK: [[NUM]] = metadata !{metadata !"vtable pointer", metadata !{{.*}}}
 // NOTBAA-NOT: = metadata !{metadata !"Simple C/C++ TBAA"}