[llvm] [InstCombine] Simplify and/or of icmp eq with op replacement (PR #70335)
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llvm-commits at lists.llvm.org
Wed Nov 1 22:22:21 PDT 2023
mikaelholmen wrote:
Ok. I *think* this exposes a miscompile with this patch:
```opt -passes=instcombine ic.ll -o - -S```
With the patch we get
```
land.end: ; preds = %for.body
br i1 poison, label %cond.false, label %cond.end
```
which looks broken to me.
It can surely be further reduced but I didn't want to risk messing something up now.
[ic.ll.gz](https://github.com/llvm/llvm-project/files/13234594/ic.ll.gz)
https://github.com/llvm/llvm-project/pull/70335
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