[llvm] [InstCombine] Fold `(icmp eq/ne (add nuw x, y), 0)` -> `(icmp eq/ne (or x, y), 0)` (PR #88088)

[via llvm-commits]

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@@ -1802,22 +1798,17 @@ define i1 @test4(i32 %a) {
   ret i1 %c
 }
 
-define { i32, i1 } @test4multiuse(i32 %a) {
-; CHECK-LABEL: @test4multiuse(
-; CHECK-NEXT:    [[B:%.*]] = add nsw i32 [[A:%.*]], -2147483644
-; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[A]], 2147483640
-; CHECK-NEXT:    [[TMP:%.*]] = insertvalue { i32, i1 } undef, i32 [[B]], 0
-; CHECK-NEXT:    [[RES:%.*]] = insertvalue { i32, i1 } [[TMP]], i1 [[C]], 1
-; CHECK-NEXT:    ret { i32, i1 } [[RES]]
+define {
+i32, i1 } @test4multiuse(i32 %a) {
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goldsteinn wrote:

no, I have a crappy regex to try to format by IR that failed miserably here. Ill fix

https://github.com/llvm/llvm-project/pull/88088