[llvm] [X86] Select i8 ANDN via i32 promotion (PR #205050)

[Phoebe Wang via llvm-commits]

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@@ -381,7 +381,7 @@ define i1 @andn_cmp_swap_ops(i64 %x, i64 %y) {
   ret i1 %cmp
 }
 
-; Use a 'test' (not an 'and') because 'andn' only works for i32/i64.
+; Use a 'test' for the final i8 compare.
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phoebewang wrote:

Comment changed but assemble not?

https://github.com/llvm/llvm-project/pull/205050