1 files changed, 26 insertions, 0 deletions
diff --git a/testsuite/synth/issue2286/test_addsub.vhdl b/testsuite/synth/issue2286/test_addsub.vhdl
new file mode 100644
index 000000000..00e6aed21
--- /dev/null
+++ b/testsuite/synth/issue2286/test_addsub.vhdl
@@ -0,0 +1,26 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std_unsigned.all;
+
+entity test_addsub is
+  port (
+    slv : in  std_logic_vector(3 downto 0);
+    nat : in  natural range 0 to 15;
+    add_slvslv : out std_logic_vector(3 downto 0);
+    add_slvnat : out std_logic_vector(3 downto 0);
+    add_natslv : out std_logic_vector(3 downto 0);
+    sub_slvslv : out std_logic_vector(3 downto 0);
+    sub_slvnat : out std_logic_vector(3 downto 0);
+    sub_natslv : out std_logic_vector(3 downto 0)
+  );
+end;
+
+architecture rtl of test_addsub is
+begin
+  add_slvslv <= slv + slv;
+  add_slvnat <= slv + nat;
+  add_natslv <= nat + slv;
+  sub_slvslv <= slv - slv;
+  sub_slvnat <= slv - nat;
+  sub_natslv <= nat - slv;
+end;