define i32 @a(i1 zeroext %x, i1 zeroext %y) {
entry:
-; CHECK: @a
+; CHECK-LABEL: @a(
; CHECK: [[TMP1:%.*]] = sext i1 %y to i32
; CHECK: [[TMP2:%.*]] = select i1 %x, i32 2, i32 1
-; CHECK-NEXT: add i32 [[TMP2]], [[TMP1]]
+; CHECK-NEXT: add nsw i32 [[TMP2]], [[TMP1]]
%conv = zext i1 %x to i32
%conv3 = zext i1 %y to i32
%conv3.neg = sub i32 0, %conv3