[llvm] [X86][APX] Handle AND_NF instruction for compare peephole (PR #136233)

[Evgenii Kudriashov via llvm-commits]

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@@ -73,3 +73,36 @@ bb14:                                             ; preds = %bb12
 bb16:                                             ; preds = %bb14, %bb11, %bb10, %bb
   ret void
 }
+
+; Replacement of CMP should happen with SUB not with AND as it is AND_NF
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e-kud wrote:

Yes. I haven't liked this comment too because we don't see sub in the assembly. Reworded it with _We must not try to replace CMP with AND_NF as it sets no flags_. I also double checked the `optimizeCompareInstr`. In other cases we use switches where only `CASE_ND` is used. This one with `isAND` was an exception.

https://github.com/llvm/llvm-project/pull/136233