1 files changed, 23 insertions, 0 deletions
diff --git a/testsuite/synth/issue1531/tb_sgn.vhdl b/testsuite/synth/issue1531/tb_sgn.vhdl
new file mode 100644
index 000000000..8e12ae9c7
--- /dev/null
+++ b/testsuite/synth/issue1531/tb_sgn.vhdl
@@ -0,0 +1,23 @@
+entity tb_sgn is
+end tb_sgn;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_sgn is
+  signal o1 : std_logic_vector(1 downto 0);
+  signal o2 : std_logic_vector (31 downto 0);
+begin
+  ent_1: entity work.sgn
+    port map (
+      o1 => o1,
+      o2 => o2);
+
+  process
+  begin
+    wait for 1 ns;
+    assert o1 = "01" severity failure;
+    assert o2 = x"ffff_fffb" severity failure;
+    wait;
+  end process;
+end behav;