[llvm] [DAG] Reducing instructions by better legalization handling of AVGFLOORU for illegal data types (PR #99913)

[Julius Alexandre via llvm-commits]

medievalghoul wrote:

@topperc I'm still getting build bot errors failing llvm/test/CodeGen/AArch64/avgflooru-i128.ll, were you able to revert everything?

https://github.com/llvm/llvm-project/pull/99913