[llvm] [InstCombine] Match scalable splats in m_ImmConstant (PR #132522)

[antoine moynault via llvm-commits]

antmox wrote:

thanks @lukel97 
about the error message, I guess it is not part of the buildbot emails
I found it in the buildbot build pages, like https://lab.llvm.org/buildbot/#/builders/41/builds/5897/steps/18/logs/stdio

https://github.com/llvm/llvm-project/pull/132522