[PATCH] D101191: [InstCombine] Fully disable select to and/or i1 folding

Sun May 30 04:28:22 PDT 2021

spatel added a comment.

In D101191#2783570 <https://reviews.llvm.org/D101191#2783570>, @rupprecht wrote:

> In D101191#2782963 <https://reviews.llvm.org/D101191#2782963>, @rupprecht wrote:
>
>> The issue I'm seeing seems more directly caused by SLP vectorization, as it goes away with `-fno-slp-vectorize`. This patch merely unblocks that bad optimization AFAICT.
>
> Filed as http://llvm.org/PR50500

We needed SLP to get to the problem state in that example, but the bug was in instcombine/instsimplify. 
Should be fixed with:
7bb8bfa0622b <https://reviews.llvm.org/rG7bb8bfa0622b8ee55c3f748004dcf4d83d48cf97>

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D101191/new/

https://reviews.llvm.org/D101191