[PATCH] D76483: [DivRemPairs] Freeze operands if they can be undef values
Sanne Wouda via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
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
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https://reviews.llvm.org/D76483/new/
https://reviews.llvm.org/D76483
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