[PATCH] D150246: AMDGPU: Fix issue in shl(or) combine

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

I think this is OK, but wouldn't it be simpler to transform `((a | c1) << c2) ==> (a << c2) | (c1 << c2)` and remove the knownbits check? Or do you think that would make the generated code worse overall?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D150246/new/

https://reviews.llvm.org/D150246