[PATCH] D85965: [GlobalISel] Add a combine for ashr(shl x, c), c --> sext_inreg x, c'

[Amara Emerson via Phabricator via llvm-commits]

aemerson added a comment.

In D85965#2218104 <https://reviews.llvm.org/D85965#2218104>, @arsenm wrote:

> Seems like it's missing a legality check, although I'm unclear on what the overall strategy for those is supposed to be

This is intended to run prelegalizer so I don't think we need it.


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  https://reviews.llvm.org/D85965/new/

https://reviews.llvm.org/D85965