[llvm] [X86] Invert (and X, ~(and ~Y, Z)) back into (and X, (or Y, ~Z)) (PR #109215)

[Miguel Saldivar via llvm-commits]

Saldivarcher wrote:

@topperc and @RKSimon thanks for the help and explanations, they were extremely useful. 

@nikic sorry you had to make the changes because of me! Those were good changes tho 👍 

https://github.com/llvm/llvm-project/pull/109215