[PATCH] D54174: [GlobalISel] LegalizationArtifactCombiner: Combine aext([asz]ext x) -> [asz]ext x

[Daniel Sanders via Phabricator via llvm-commits]

dsanders added a comment.

What's the reason for not putting this in a post-legalize combiner? It seems to me that we'll have to implement this in the Legalizer and the Combiner


https://reviews.llvm.org/D54174