[NFC][InstCombine] '(Op1 & С) - Op1' -> '-(Op1 & ~C)' fold (PR44427)
This decreases use count of Op1, potentially allows us to further hoist said 'neg' later on, and results in marginally better X86 codegen. Name: (Op1 & С) - Op1 -> -(Op1 & ~C) %o = and i64 %Op1, C1 %r = sub i64 %o, %Op1 => %n = and i64 %Op1, ~C1 %r = sub i64 0, %n https://rise4fun.com/Alive/rwgA https://godbolt.org/z/R_RMfM https://bugs.llvm.org/show_bug.cgi?id=44427
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