testsuite/synth: add testcase for previous commit.

1 files changed, 31 insertions, 0 deletions

diff --git a/testsuite/synth/synth58/function_test.vhdl b/testsuite/synth/synth58/function_test.vhdl
new file mode 100644
index 000000000..a612fea10
--- /dev/null
+++ b/testsuite/synth/synth58/function_test.vhdl
@@ -0,0 +1,31 @@
+library ieee;
+  use ieee.std_logic_1164.all;
+
+entity function_test is
+  generic (
+    g : std_logic := '1'
+  );
+  port (
+    i : in std_logic_vector(7 downto 0);
+    o : out std_logic_vector(7 downto 0)
+  );
+end function_test;
+
+architecture rtl of function_test is
+
+  function assign_value(value : in std_logic_vector(7 downto 0);
+                        invert : in std_logic)
+                        return std_logic_vector is
+    variable slv_out : std_logic_vector(7 downto 0);
+  begin
+    if invert = '0' then
+      slv_out := value;
+    elsif invert = '1' then
+      slv_out := not value;
+    end if;
+    return slv_out;
+  end;
+
+begin
+  o <= assign_value(i, g);
+end rtl;