From bb1a8a019030022e8e5ad794691497c725ec86b2 Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Wed, 21 Aug 2019 21:58:20 -0700
Subject: [PATCH] Add test

---
 tests/opt/opt_expr.ys | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/opt/opt_expr.ys b/tests/opt/opt_expr.ys
index f0306efa1..4affc1ac8 100644
--- a/tests/opt/opt_expr.ys
+++ b/tests/opt/opt_expr.ys
@@ -221,3 +221,17 @@ check
 equiv_opt opt_expr -fine
 design -load postopt
 select -assert-count 1 t:$alu r:A_WIDTH=8 r:B_WIDTH=8 r:Y_WIDTH=9 %i %i %i
+
+###########
+
+design -reset
+read_verilog -icells <<EOT
+module opt_expr_shiftx(input [2:0] a, input [1:0] b, output y);
+    \$shiftx #(.A_SIGNED(0), .B_SIGNED(0), .A_WIDTH(4), .B_WIDTH(2), .Y_WIDTH(1)) shiftx (.A({1'bx,a}), .B(b), .Y(y));
+endmodule
+EOT
+check
+
+equiv_opt opt_expr
+design -load postopt
+select -assert-count 1 t:$shiftx r:A_WIDTH=3 %i
-- 
2.30.2