[llvm] XCOFF associated metadata (PR #159096)

[Wael Yehia via llvm-commits]

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+; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff < %s | FileCheck %s
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w2yehia wrote:

I think we need a test for the object file output

https://github.com/llvm/llvm-project/pull/159096