llvm-project

b85e7f04 - [X86] isSplatValueForTargetNode - test source value for vector uniform shift ops (#186619)

[X86] isSplatValueForTargetNode - test source value for vector uniform shift ops (#186619) For old SSE style vector shifts, we just need to check the shifted value is a splat as the shift amount is uniform Avoids an unnecessary variable shuffle in i512 ashr expansion