synth: add testcase for previous commit.

1 files changed, 28 insertions, 0 deletions

diff --git a/testsuite/synth/slice01/slice01.vhdl b/testsuite/synth/slice01/slice01.vhdl
new file mode 100644
index 000000000..0aaeced74
--- /dev/null
+++ b/testsuite/synth/slice01/slice01.vhdl
@@ -0,0 +1,28 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity slice01 is
+  generic (w: natural := 4);
+  port (rst : std_logic;
+        clk : std_logic;
+        di : std_logic;
+        do : out std_logic_vector (w - 1 downto 0));
+end slice01;
+
+architecture behav of slice01 is
+  signal r : std_logic_vector (w - 1 downto 0);
+begin
+  do <= r;
+  
+  process(clk)
+  begin
+    if rising_edge (clk) then
+      if rst = '1' then
+        r <= (others => '0');
+      else
+        r (w - 2 downto 0) <= r (w - 1 downto 1);
+        r (w - 1) <= di;
+      end if;
+    end if;
+  end process;
+end behav;