synth: add testcase for concurrent selected signal assignment.

3 files changed, 75 insertions, 0 deletions

diff --git a/testsuite/synth/issue12/lut.vhdl b/testsuite/synth/issue12/lut.vhdl
new file mode 100644
index 000000000..5c04e8d9a
--- /dev/null
+++ b/testsuite/synth/issue12/lut.vhdl
@@ -0,0 +1,25 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity lut is port (
+    sel: in std_logic_vector (1 downto 0);
+    c: out std_logic);
+end lut;
+
+-- sel(1)  sel(0) |  c 
+--   0       0    |  1    
+--   0       1    |  0
+--   1       0    |  1
+--   1       1    |  0
+
+architecture synth of lut is
+begin
+
+with sel select c <=
+
+    '1' when "00",
+    '0' when "01",
+    '1' when "10",
+    '0' when others;
+
+end synth;
diff --git a/testsuite/synth/issue12/tb_lut.vhdl b/testsuite/synth/issue12/tb_lut.vhdl
new file mode 100644
index 000000000..f8f5cf3a6
--- /dev/null
+++ b/testsuite/synth/issue12/tb_lut.vhdl
@@ -0,0 +1,34 @@
+entity tb_lut is
+end tb_lut;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_lut is
+  signal c : std_logic;
+  signal s : std_logic_vector(1 downto 0);
+begin
+  dut: entity work.lut
+    port map (s, c);
+
+  process
+  begin
+    s <= "00";
+    wait for 1 ns;
+    assert c = '1' severity failure;
+
+    s <= "01";
+    wait for 1 ns;
+    assert c = '0' severity failure;
+
+    s <= "10";
+    wait for 1 ns;
+    assert c = '1' severity failure;
+
+    s <= "11";
+    wait for 1 ns;
+    assert c = '0' severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/issue12/testsuite.sh b/testsuite/synth/issue12/testsuite.sh
new file mode 100755
index 000000000..a65695152
--- /dev/null
+++ b/testsuite/synth/issue12/testsuite.sh
@@ -0,0 +1,16 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+for t in lut; do
+    analyze $t.vhdl tb_$t.vhdl
+    elab_simulate tb_$t
+    clean
+
+    synth $t.vhdl -e $t > syn_$t.vhdl
+    analyze syn_$t.vhdl tb_$t.vhdl
+    elab_simulate tb_$t
+    clean
+done
+
+echo "Test successful"