Update compare-3way.ll

Author: AZero13

llvm/test/Transforms/InstCombine/compare-3way.ll

@@ -585,6 +585,19 @@ define i16 @smax_smin_to_scmp_i16(i16 %x) {
   ret i16 %cond5
 }
 
+; Test the reversed pattern: smax(smin(X, 1), -1) -> scmp(X, 0)
+define i32 @smin_smax_to_scmp(i32 %x) {
+; CHECK-LABEL: define i32 @smin_smax_to_scmp
+; CHECK-SAME: (i32 [[X:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X]], i32 -1)
+; CHECK-NEXT:    [[COND5:%.*]] = call i32 @llvm.smin.i32(i32 [[TMP1]], i32 1)
+; CHECK-NEXT:    ret i32 [[COND5]]
+;
+  %cond = call i32 @llvm.smin.i32(i32 %x, i32 1)
+  %cond5 = call i32 @llvm.smax.i32(i32 %cond, i32 -1)
+  ret i32 %cond5
+}
+
 define i32 @test_max_min_neg(i32 %x) {
 ; CHECK-LABEL: define i32 @test_max_min_neg
 ; CHECK-SAME: (i32 [[X:%.*]]) {
@@ -597,8 +610,8 @@ define i32 @test_max_min_neg(i32 %x) {
   ret i32 %cond5
 }
 
-define i32 @test_no_optimization_multiple_uses(i32 %x) {
-; CHECK-LABEL: define i32 @test_no_optimization_multiple_uses
+define i32 @test_multiple_uses(i32 %x) {
+; CHECK-LABEL: define i32 @test_multiple_uses
 ; CHECK-SAME: (i32 [[X:%.*]]) {
 ; CHECK-NEXT:    [[COND:%.*]] = call i32 @llvm.smax.i32(i32 [[X]], i32 -1)
 ; CHECK-NEXT:    [[COND5:%.*]] = call i32 @llvm.smin.i32(i32 [[COND]], i32 1)