testsuite/synth: add a test for #1258

3 files changed, 80 insertions, 0 deletions

diff --git a/testsuite/synth/issue1258/ent.vhdl b/testsuite/synth/issue1258/ent.vhdl
new file mode 100644
index 000000000..045bec142
--- /dev/null
+++ b/testsuite/synth/issue1258/ent.vhdl
@@ -0,0 +1,28 @@
+-- count number of '1'.
+library ieee;
+use ieee.std_logic_1164.all;
+entity ent is
+  port    (
+    sel   : in  std_ulogic;
+    din   : in  std_ulogic_vector(15 downto 0);
+    dout  : out std_ulogic
+  );
+end;
+
+architecture rtl of ent is
+begin
+  comb : process (sel, din)
+    variable v : std_ulogic;
+  begin
+    v := '0';
+    if sel = '1' then
+      for i in din'range loop
+        if din(i) = '0' then
+          next;
+        end if;
+        v := not v;
+      end loop;
+    end if;
+    dout <= v;
+  end process;
+end;
diff --git a/testsuite/synth/issue1258/tb_ent.vhdl b/testsuite/synth/issue1258/tb_ent.vhdl
new file mode 100644
index 000000000..1d9a2db92
--- /dev/null
+++ b/testsuite/synth/issue1258/tb_ent.vhdl
@@ -0,0 +1,45 @@
+entity tb_ent is
+end tb_ent;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_ent is
+  signal s : std_ulogic;
+  signal din : std_ulogic_vector(15 downto 0);
+  signal dout : std_ulogic;
+begin
+  dut: entity work.ent
+    port map (s, din, dout);
+
+  process
+  begin
+    s <= '1';
+    din <= x"00_00";
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    din <= x"04_00";
+    wait for 1 ns;
+    assert dout = '1' severity failure;
+
+    din <= x"10_40";
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    din <= x"80_01";
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    din <= x"80_00";
+    wait for 1 ns;
+    assert dout = '1' severity failure;
+
+    s <= '0';
+    din <= x"80_00";
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/issue1258/testsuite.sh b/testsuite/synth/issue1258/testsuite.sh
new file mode 100755
index 000000000..5c1da263d
--- /dev/null
+++ b/testsuite/synth/issue1258/testsuite.sh
@@ -0,0 +1,7 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+synth_tb ent
+
+echo "Test successful"