[clang] [flang] [llvm] [TargetVerifier][AMDGPU] Add TargetVerifier. (PR #123609)

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+//===-- llvm/Target/TargetVerifier.h - LLVM IR Target Verifier ---*- C++ -*-===//
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jofrn wrote:

It is to just have a common interface to derive from, but we will not instantiate the base class as per the current method.

https://github.com/llvm/llvm-project/pull/123609