<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61027>61027</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [OpenMP] Compiler crashes when using `use_device_ptr` in an inheriting class
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          jhuber6
      </td>
    </tr>
</table>

<pre>
    Currently, we crash on an assertion when we try to use a member from a parent class. This is caused by an assertion that the initializer of the variable is a `this` clause, which isn't true in this case as it is actually a cast.

```
class A {
public:
  double *ptr;
  virtual void foo() = 0;
};

class B : public A {
public:
  virtual void foo() override;
};

void B::foo() {
#pragma omp target data use_device_ptr(A::ptr)
 {}
}
```
```
$ clang bug.cpp -fopenmp --offload-arch=sm_80 --offload-device-only -S -emit-llvm -o -
clang-17: /root/llvm-project/clang/lib/CodeGen/CGStmtOpenMP.cpp:7149: void clang::CodeGen::CodeGenFunction::EmitOMPUseDevicePtrClause(const clang::OMPUseDevicePtrClause&, clang::CodeGen::CodeGenFunction::OMPPrivateScope&, const llvm::DenseMap<const clang::ValueDecl*, clang::CodeGen::Address>&): Assertion `isa<CXXThisExpr>(ME->getBase()) && "Base should be the current struct!"' failed.
```

The AST dump for the problematic expression shows
```
MemberExpr 0x5558ae7245b0 'double *' lvalue ->ptr 0x5558ae7053d0
`-ImplicitCastExpr 0x5558ae724590 'class A *' <UncheckedDerivedToBase (A)>
  `-CXXThisExpr 0x5558ae724580 'class B *' implicit this
```
 This bug is reproducible from the following link https://godbolt.org/z/Kand715qs.
</pre>
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