[llvm] [X86] Remove redundant and-not pattern code in X86 (PR #157687)

[via llvm-commits]

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@@ -155,10 +155,10 @@ B:
 define i32 @test10(i64 %b, i64 %c, i1 %d) {
 ; ALL-LABEL: test10:
 ; ALL:       ## %bb.0:
+; ALL-NEXT:    xorb $1, %dl
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AZero13 wrote:

I think this is just a problem of the backend not choosing not over xor 1 when none of the bits are demanded anyway: 

https://github.com/llvm/llvm-project/pull/157687