1 files changed, 37 insertions, 0 deletions
diff --git a/testsuite/synth/issue1675/patacc.vhdl b/testsuite/synth/issue1675/patacc.vhdl
new file mode 100644
index 000000000..ecb6b0717
--- /dev/null
+++ b/testsuite/synth/issue1675/patacc.vhdl
@@ -0,0 +1,37 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+use work.pkg.all;
+
+entity patacc is
+  port (
+    clk : std_logic;
+    rst : std_logic;
+    res : out std_logic_vector(15 downto 0));
+end patacc;
+
+architecture behav of patacc is
+  signal bo : bus_rec_out_t;
+  signal acc : unsigned(15 downto 0);
+begin
+  inst: entity work.patgen
+    port map (
+      clk => clk,
+      rst => rst,
+      bo => bo);
+
+  process (clk) is
+  begin
+    if rising_edge(clk) then
+      if bo.rst = '1' then
+        acc <= (others => '0');
+      elsif bo.stb = '1' then
+        acc <= acc + unsigned(bo.dat);
+      end if;
+    end if;
+  end process;
+
+  res <= std_logic_vector(acc);
+end behav;
+