[PATCH] D25913: [InstCombine] Fold nuw left-shifts in `ugt`/`ule` comparisons.

[Sanjay Patel via llvm-commits]

spatel added a comment.

In https://reviews.llvm.org/D25913#578829, @bryant wrote:

> Rebase onto https://reviews.llvm.org/D25955.


Thanks for the preliminary patches.

As you can see from the current trunk transforms, we always canonicalize the compare predicates to ugt/ult. Unless you see a case where that doesn't happen, I think you can adjust this patch to only fire when we have ugt/ult rather than ugt/ule and remove the "pre-transform" step.


Repository:
  rL LLVM

https://reviews.llvm.org/D25913