3 files changed, 49 insertions, 1 deletions
diff --git a/testsuite/synth/iassoc01/iassoc04.vhdl b/testsuite/synth/iassoc01/iassoc04.vhdl
new file mode 100644
index 000000000..bddaa94a8
--- /dev/null
+++ b/testsuite/synth/iassoc01/iassoc04.vhdl
@@ -0,0 +1,20 @@
+entity riassoc04 is
+  port (v : bit_vector (7 downto 0);
+        res : out bit);
+end riassoc04;
+
+architecture behav of riassoc04 is
+begin
+  res <= v(0) or v(4);
+end behav;
+
+entity iassoc04 is
+  port (a, b : bit_vector (3 downto 0);
+        res : out bit);
+end iassoc04;
+
+architecture behav of iassoc04 is
+begin
+  inst : entity work.riassoc04
+    port map (v (7 downto 4) => a, v (3 downto 0) => b, res => res);
+end behav;
diff --git a/testsuite/synth/iassoc01/tb_iassoc04.vhdl b/testsuite/synth/iassoc01/tb_iassoc04.vhdl
new file mode 100644
index 000000000..1da32a469
--- /dev/null
+++ b/testsuite/synth/iassoc01/tb_iassoc04.vhdl
@@ -0,0 +1,28 @@
+entity tb_iassoc04 is
+end tb_iassoc04;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_iassoc04 is
+  signal a, b : bit_vector (3 downto 0);
+  signal res : bit;
+begin
+  dut: entity work.iassoc04
+    port map (a, b, res);
+
+  process
+  begin
+    a <= "0001";
+    b <= "0000";
+    wait for 1 ns;
+    assert res = '1' severity failure;
+
+    a <= "0000";
+    b <= "0000";
+    wait for 1 ns;
+    assert res = '0' severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/iassoc01/testsuite.sh b/testsuite/synth/iassoc01/testsuite.sh
index 15f76c252..b1ed1293f 100755
--- a/testsuite/synth/iassoc01/testsuite.sh
+++ b/testsuite/synth/iassoc01/testsuite.sh
@@ -2,7 +2,7 @@
 
 . ../../testenv.sh
 
-for t in iassoc01 iassoc02 iassoc03; do
+for t in iassoc01 iassoc02 iassoc03 iassoc04; do
     analyze pkg.vhdl $t.vhdl tb_$t.vhdl
     elab_simulate tb_$t
     clean