[PATCH] D31120: [InstCombine] Teach SimplifyDemandedUseBits that adding or subtractings 0s from every bit below the highest demanded bit can be simplified

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a subscriber: efriedma.
spatel added a comment.

In https://reviews.llvm.org/D31094, @efriedma suggested a debug counter to make this visible in a test.


https://reviews.llvm.org/D31120