[CVP] Add test for PR63330 (NFC)

diff --git a/llvm/test/Transforms/CorrelatedValuePropagation/urem-expansion.ll b/llvm/test/Transforms/CorrelatedValuePropagation/urem-expansion.ll
index 620cd5e..cc4644d 100644 (file)
--- a/llvm/test/Transforms/CorrelatedValuePropagation/urem-expansion.ll
+++ b/llvm/test/Transforms/CorrelatedValuePropagation/urem-expansion.ll
@@ -326,3 +326,21 @@ define i8 @large.divisor.with.overflow.v2.unbound.x(i8 %x) {
   %rem = urem i8 %x, 128
   ret i8 %rem
 }
+
+define i1 @icmp_after_expansion(i8 noundef %x) {
+; CHECK-LABEL: @icmp_after_expansion(
+; CHECK-NEXT:    [[CMP_X_UPPER:%.*]] = icmp ult i8 [[X:%.*]], 6
+; CHECK-NEXT:    call void @llvm.assume(i1 [[CMP_X_UPPER]])
+; CHECK-NEXT:    [[X_FROZEN:%.*]] = freeze i8 [[X]]
+; CHECK-NEXT:    [[REM_UREM:%.*]] = sub nuw i8 [[X_FROZEN]], 3
+; CHECK-NEXT:    [[REM_CMP:%.*]] = icmp ult i8 [[X_FROZEN]], 3
+; CHECK-NEXT:    [[REM:%.*]] = select i1 [[REM_CMP]], i8 [[X_FROZEN]], i8 [[REM_UREM]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i8 [[REM]], 3
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %cmp.x.upper = icmp ult i8 %x, 6
+  call void @llvm.assume(i1 %cmp.x.upper)
+  %rem = urem i8 %x, 3
+  %cmp = icmp eq i8 %rem, 3
+  ret i1 %cmp
+}