[llvm] [X86][APX] Optimize usub.sat(X, 1) to cmp+adc with NDD (PR #208475)

[via llvm-commits]

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@@ -1238,3 +1238,128 @@ bb2:                                              ; preds = %bb2, %bb1
   store ptr null, ptr %arg2, align 8
   br i1 %arg3, label %bb1, label %bb2
 }
+;
+define i8 @usubsat8_const1(i8 noundef %a) {
+; CHECK-LABEL: usubsat8_const1:
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AntonyCJ30 wrote:

Updated lines 4-5 to --check-prefixes=CHECK,NF and removed duplicate NF blocks from the new tests. Existing tests remain unchanged. Thanks!

https://github.com/llvm/llvm-project/pull/208475