[PATCH] D55572: [AArch64] Add patterns for zext/sext of shift amount.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> I suspect it would need to bake quite a bit of target-specific knowledge into it to get reasonable output

Yes.  But that's expected; assembly is inherently target-specific.  There are some target-specific checks already.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55572/new/

https://reviews.llvm.org/D55572