[PATCH] D76483: [DivRemPairs] Freeze operands if they can be undef values

Mon Mar 30 11:24:29 PDT 2020

sanwou01 added a comment.

Hi, I can confirm that D76010 <https://reviews.llvm.org/D76010> unfortunately doesn't fix the regression.

I've narrowed the problem down to Loop Strength Reduction. It looks like SCEV can't see "through" the freeze node.

I'll try to get a reduced reproducer that shows the problem; and I'll be happy to test a patch.

Thanks!

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76483/new/

https://reviews.llvm.org/D76483