[llvm] [InstCombine] Folding `(icmp eq/ne (and X, -P2), INT_MIN)` (PR #110880)

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Fri Oct 4 13:49:05 PDT 2024


goldsteinn wrote:

> > > @eugenis
> > > Looks like this breaks msan https://lab.llvm.org/buildbot/#/builders/164/builds/3279
> > > And I mean msan itself, not the code. Similar bot on released compiler, and same code, does not repor https://lab.llvm.org/buildbot/#/builders/169
> > 
> > 
> > Hmm? As in MSAN no longer works correctly when compiled with this PR?
> 
> Yes, I bisected locally.. Reports looks wrong https://lab.llvm.org/buildbot/#/builders/164/builds/3279/steps/14/logs/stdio

Okay, might just be this PR is buggy and causes miscompiles, although its pretty simple and I don't see it.

https://github.com/llvm/llvm-project/pull/110880


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