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

Fri Mar 27 23:05:54 PDT 2020

aqjune added a comment.

In D76483#1946766 <https://reviews.llvm.org/D76483#1946766>, @sanwou01 wrote:

> Hi, we're seeing a performance drop of 1.3% on SPEC 2017 mcf_r (compiled with LTO enabled) on AArch64 that bisects down to this patch. I'm testing whether D76010 <https://reviews.llvm.org/D76010> happens to fix this regression (I'll comment when I get the results), but if not then this might need some investigation to see what's going on.

Hi, thank you for the info. Once the blocked transformation is identified, I'll help finding out solutions for the problem.

Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D76483/new/

https://reviews.llvm.org/D76483