[llvm] [InstCombine] Fold `(X & Mask) == 0 ? TC : FC -> TC binop (X & Mask)` (PR #100437)

[Davide Italiano via llvm-commits]

dcci wrote:

Hi folks, I noticed this commit regresses size at `-Oz` (reduced from a large example):
cc: @dtcxzyw @goldsteinn @nikic 

Reported in: https://github.com/llvm/llvm-project/issues/111081

https://github.com/llvm/llvm-project/pull/100437