[llvm] [AMDGPU] Stop combining arbitrary offsets into PAL relocs (PR #80034)

[Jay Foad via llvm-commits]

jayfoad wrote:

This change affected Mesa too. I have raised a Mesa issue to support RELA relocations so we could revert the Mesa part of this: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10542

https://github.com/llvm/llvm-project/pull/80034