[llvm] [InstCombine] Fold `(icmp eq/ne (or (select cond, 0/NZ, 0/NZ), X), 0)` (PR #88183)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> > @goldsteinn Can you have a look at the ir diff? [dtcxzyw/llvm-opt-benchmark#491](https://github.com/dtcxzyw/llvm-opt-benchmark/pull/491) There are some unnecessary and/or insts before branches.
> 
> Sorry for taking so long to get to this... can you re-run, I went through a few of them but they seem to have disappeared...

Yeah, IR diff looks good now :)


https://github.com/llvm/llvm-project/pull/88183