[clang][RelativeVTablesABI] Update CodeGenCXX/RelativeVTablesABI/dynamic-cast.cpp

[leonardchan]

Summary

After c7bcd431d9c4bfeb631a3599f1d628603e6351d6, this test started failing when running with the new pass manager. One of the CHECKs in this file checks how the vtable is loaded for a void cast, which involves taking 2 bitcasts from the pointer to the original object. The order of these bitcasts changes under the new PM. The order doesn't matter, so this relaxes the CHECKs.

[phosek]

LGTM

clang/test/CodeGenCXX/RelativeVTablesABI/dynamic-cast.cpp

 // CHECK-NEXT:   ret %class.B* %b
 // CHECK-NEXT: }
 
 // CHECK: define i8* @_Z9void_castP1B(%class.B* readonly %b) local_unnamed_addr
 // CHECK-NEXT: entry:
 // CHECK-NEXT:   [[isnull:%[0-9]+]] = icmp eq %class.B* %b, null
 // CHECK-NEXT:   br i1 [[isnull]], label %[[dynamic_cast_end:[a-z0-9._]+]], label %[[dynamic_cast_notnull:[a-z0-9._]+]]
 // CHECK:      [[dynamic_cast_notnull]]:
-// CHECK-NEXT:   [[b2:%[0-9]+]] = bitcast %class.B* %b to i32**
-// CHECK-NEXT:   [[vtable:%[a-z0-9]+]] = load i32*, i32** [[b2]], align 8
-// CHECK-NEXT:   [[offset_ptr:%.+]] = getelementptr inbounds i32, i32* [[vtable]], i64 -2
-// CHECK-NEXT:   [[offset_to_top:%.+]] = load i32, i32* [[offset_ptr]], align 4
-// CHECK-NEXT:   [[b:%[0-9]+]] = bitcast %class.B* %b to i8*
-// CHECK-NEXT:   [[offset_to_top2:%.+]] = sext i32 [[offset_to_top]] to i64
-// CHECK-NEXT:   [[casted:%.+]] = getelementptr inbounds i8, i8* [[b]], i64 [[offset_to_top2]]
+// CHECK-DAG:    [[b2:%[0-9]+]] = bitcast %class.B* %b to i32**
+// CHECK-DAG:    [[vtable:%[a-z0-9]+]] = load i32*, i32** [[b2]], align 8
+// CHECK-DAG:    [[offset_ptr:%.+]] = getelementptr inbounds i32, i32* [[vtable]], i64 -2
+// CHECK-DAG:    [[offset_to_top:%.+]] = load i32, i32* [[offset_ptr]], align 4
+// CHECK-DAG:    [[b:%[0-9]+]] = bitcast %class.B* %b to i8*
+// CHECK-DAG:    [[offset_to_top2:%.+]] = sext i32 [[offset_to_top]] to i64
+// CHECK-DAG:    [[casted:%.+]] = getelementptr inbounds i8, i8* [[b]], i64 [[offset_to_top2]]
 // CHECK-NEXT:   br label %[[dynamic_cast_end]]
 // CHECK:      [[dynamic_cast_end]]:
 // CHECK-NEXT:   [[res:%[0-9]+]] = phi i8* [ [[casted]], %[[dynamic_cast_notnull]] ], [ null, %entry ]
 // CHECK-NEXT:   ret i8* [[res]]
 // CHECK-NEXT: }
 
 class A {
 public: