[PATCH] D97495: [SimplifyCFG] avoid illegal phi with both poison and undef

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune accepted this revision.
aqjune added a comment.
This revision is now accepted and ready to land.

LGTM
The fix is conservative, but I think it is okay. I believe this will be helpful in addressing (imaginary) hidden crashes by making undef/poison operands homogeneous.


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