[clang] [CIR] vTableClassNameForType: return correct VTableClass name for Type::ObjCObjectPointer, Type::Pointer (PR #163850)

[via cfe-commits]

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@@ -244,3 +244,32 @@ void throw_enum_class_expr() {
 // OGCG: store i32 0, ptr %[[EXCEPTION_ADDR]], align 16
 // OGCG: call void @__cxa_throw(ptr %[[EXCEPTION_ADDR]], ptr @_ZTIZ21throw_enum_class_exprvE4Test, ptr null)
 // OGCG: unreachable
+
+void throw_pointer_type() {
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n2h9 wrote:

It is mentioned in issue [description](https://github.com/llvm/llvm-project/issues/163601#issue-3518963479)  that one way to test is to throw the proper type (it will execute the code part which this pr updates). 

The test which I added does not execute the code which I updated. Instead of throwing pointer to int, we should throw pointer to object, then this case `case Type::Pointer:` will be executed in `vTableClassNameForType`.

https://github.com/llvm/llvm-project/pull/163850