1 files changed, 67 insertions, 0 deletions
diff --git a/testsuite/gna/issue531/repro1.vhdl b/testsuite/gna/issue531/repro1.vhdl
new file mode 100644
index 000000000..7cf8e3c65
--- /dev/null
+++ b/testsuite/gna/issue531/repro1.vhdl
@@ -0,0 +1,67 @@
+library ieee;
+   use ieee.std_logic_1164.all;
+   use ieee.numeric_std.all;
+
+entity submodule is
+port (
+   clk    : in  std_logic;
+   arg : in  std_logic_vector(7 downto 0);
+   res : out std_logic_vector(7 downto 0)
+);
+end submodule;
+
+architecture rtl of submodule is
+begin
+  sub_proc : process(clk)
+    variable last : std_logic_vector(7 downto 0);
+   begin
+      if rising_edge(clk) then
+         res <= arg XOR last;
+         last := arg;
+      end if;
+   end process sub_proc;
+
+    monitor : process(clk)
+   begin
+      if rising_edge(clk) then
+        report "arg: " & integer'image(to_integer(unsigned(arg)));
+      end if;
+   end process;
+end rtl;
+
+
+library ieee;
+   use ieee.std_logic_1164.all;
+
+entity sliced_ex is
+port (
+   arg_a : in  std_logic_vector(3 downto 0);
+   arg_b : in  std_logic_vector(3 downto 0)
+);
+end sliced_ex;
+
+architecture rtl of sliced_ex is
+  signal clk   :  std_logic;
+begin
+   process
+   begin
+     clk <= '0';
+     for i in 1 to 5 * 2 loop
+       wait for 10 ns;
+       clk <= not clk;
+     end loop;
+     wait;
+   end process;
+
+   sub_module : entity work.submodule
+   port map (
+      clk => clk,
+
+      -- This one fails
+      arg(3 downto 0) => arg_a(3 downto 0),
+      arg(7 downto 4) => arg_b(3 downto 0),
+
+      res => OPEN
+   );
+
+end rtl;