[llvm] [X86]: Rewrite demorgan rule for ANDN (PR #163789)

[via llvm-commits]

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@@ -33,20 +36,13 @@ entry:
 
 ; Check that eon is generated if the xor is a disjoint or.
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kper wrote:

wip: somehow the annotations are gone

https://github.com/llvm/llvm-project/pull/163789