opt_expr: refactor simplification of signed X>=0 and X<0. NFCI.

1 files changed, 14 insertions, 8 deletions

diff --git a/tests/opt/opt_expr_cmp.v b/tests/opt/opt_expr_cmp.v
index 7eb65d531..72372bdf0 100644
--- a/tests/opt/opt_expr_cmp.v
+++ b/tests/opt/opt_expr_cmp.v
@@ -1,11 +1,17 @@
 module top(...);
   input [3:0] a;
-  output o1 = 4'b0000 >  a;
-  output o2 = 4'b0000 <= a;
-  output o3 = 4'b1111 <  a;
-  output o4 = 4'b1111 >= a;
-  output o5 = a <  4'b0000;
-  output o6 = a >= 4'b0000;
-  output o7 = a >  4'b1111;
-  output o8 = a <= 4'b1111;
+
+  output o1_1 = 4'b0000 >  a;
+  output o1_2 = 4'b0000 <= a;
+  output o1_3 = 4'b1111 <  a;
+  output o1_4 = 4'b1111 >= a;
+  output o1_5 = a <  4'b0000;
+  output o1_6 = a >= 4'b0000;
+  output o1_7 = a >  4'b1111;
+  output o1_8 = a <= 4'b1111;
+
+  output o2_1 = 4'sb0000 >  $signed(a);
+  output o2_2 = 4'sb0000 <= $signed(a);
+  output o2_3 = $signed(a) <  4'sb0000;
+  output o2_4 = $signed(a) >= 4'sb0000;
 endmodule