testsuite/synth: add a test for #2408

2 files changed, 47 insertions, 0 deletions

diff --git a/testsuite/synth/issue2408/bug.vhdl b/testsuite/synth/issue2408/bug.vhdl
new file mode 100644
index 000000000..179b30298
--- /dev/null
+++ b/testsuite/synth/issue2408/bug.vhdl
@@ -0,0 +1,39 @@
+library IEEE;
+use IEEE.std_logic_1164.all;
+use IEEE.std_logic_arith.all;
+
+entity bug is
+	generic(
+		LEN : positive := 32;
+        POS : natural := 10
+	);
+	port(
+		output  : out signed(LEN-1 downto 0)
+	);
+
+    function GET_NUM_FUNC(n : natural) return integer is
+	variable result	:integer;
+	begin
+		case n is
+			when 0 => result := 16#010020#;
+			when 1 => result := 16#020D30#;
+			when 2 => result := 16#00FC1#;
+			when 3 => result := 16#05010#;
+			when 4 => result := 16#02800#;
+			when 5 => result := 16#01400#;
+			when 6 => result := 16#002F#;
+			when 7 => result := 16#0508#;
+			when 8 => result := 16#0200#;
+			when 9 => result := 16#0100#;
+			when 10 => result := 16#0A0#;
+			when others => result := 16#0#;
+		end case;
+		return result;
+	end GET_NUM_FUNC;
+
+end bug;
+
+architecture behav of bug is
+begin
+	output <= conv_signed(GET_NUM_FUNC(POS), LEN);
+end architecture;
diff --git a/testsuite/synth/issue2408/testsuite.sh b/testsuite/synth/issue2408/testsuite.sh
new file mode 100755
index 000000000..7de7b802c
--- /dev/null
+++ b/testsuite/synth/issue2408/testsuite.sh
@@ -0,0 +1,8 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+GHDL_STD_FLAGS=-fsynopsys
+synth_only bug
+
+echo "Test successful"