1 files changed, 34 insertions, 0 deletions
diff --git a/testsuite/synth/uassoc01/uassoc01.vhdl b/testsuite/synth/uassoc01/uassoc01.vhdl
new file mode 100644
index 000000000..d9ec2b354
--- /dev/null
+++ b/testsuite/synth/uassoc01/uassoc01.vhdl
@@ -0,0 +1,34 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity uassoc01_sub is
+  port (i : std_logic_vector;
+        o : out std_logic_vector);
+end uassoc01_sub;
+
+architecture behav of uassoc01_sub is
+begin
+  o <= not i;
+end behav;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity uassoc01 is
+  port (i1 : std_logic_vector(3 downto 0);
+        i2 : std_logic_vector(7 downto 0);
+        o : out std_logic_vector(3 downto 0));
+end uassoc01;
+
+architecture rtl of uassoc01 is
+  signal o1: std_logic_vector(3 downto 0);
+  signal o2: std_logic_vector(7 downto 0);
+begin
+  dut1: entity work.uassoc01_sub
+    port map (i => i1, o => o1);
+
+  dut2: entity work.uassoc01_sub
+    port map (i => i2, o => o2);
+
+  o <= o1 xor o2 (3 downto 0);
+end rtl;