[PATCH] D38536: Improve lookThroughCast function.

[Artur Gainullin via Phabricator via llvm-commits]

ArturGainullin added a comment.

For using constant from cmp instruction (instead of recreation) we will need to check that truncated constant is equal to lower bits of cmp constant. 
That is why I decided just to recreate constant  which looks like more general solution.


https://reviews.llvm.org/D38536