[PATCH] D93065: [InstCombine] Disable optimizations of select instructions that causes propagation of poison values

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added a comment.

Okay, I think the remaining optimizations (other than opened patches) are:

- LoopUnswitch.cpp: I can address this
- PredicateInfo.cpp: I'm not sure whether a local change will be enough, because the relevant classes in PredicateInfo.h are exposed to other optimizations.
- SimpleLoopUnswitch.cpp, LoopPredication.cpp, InductiveRangeCheckElimination.cpp: have no idea

After LoopUnswitch and PredicateInfo is updated & the select -> and/or is conditionally allowed, we can try performance evaluation again and see whether there still exists regression. What do you think? @nikic @congzhe


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https://reviews.llvm.org/D93065