[InstComine] Forego of one-use check in (X - (X & Y)) --> (X & ~Y) if Y is a constant
Summary:
This is potentially more friendly for further optimizations,
analysies, e.g.: https://godbolt.org/z/G24anE
This resolves phase-ordering bug that was introduced
in D75145 for https://godbolt.org/z/2gBwF2
https://godbolt.org/z/XvgSua
Reviewers: spatel, nikic, dmgreen, xbolva00
Reviewed By: nikic, xbolva00
Subscribers: hiraditya, zzheng, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D75757
1badf7c33a