testsuite/synth: add a test for #1074

2 files changed, 44 insertions, 0 deletions

diff --git a/testsuite/synth/issue1074/blinky.vhdl b/testsuite/synth/issue1074/blinky.vhdl
new file mode 100644
index 000000000..5f5acbb0d
--- /dev/null
+++ b/testsuite/synth/issue1074/blinky.vhdl
@@ -0,0 +1,37 @@
+library ieee;
+use ieee.std_logic_1164.ALL;
+use ieee.numeric_std.all;
+
+entity blinky is
+port ( 
+           clk : in  std_logic;
+           led : out std_logic
+    );
+end blinky;
+
+architecture rtl of blinky is
+constant max_count : natural := 48000000;
+signal rst : std_logic;
+begin
+    rst <= '0';
+    -- 0 to max_count counter
+    counter : process(clk, Rst)
+    variable count : natural range 0 to max_count;
+    begin
+    if rising_edge(clk) then
+        if count < max_count/2 then
+            count := count + 1;
+            led <= '1';
+        elsif count < max_count then
+            led <= '0';
+            count := count + 1;
+        else
+            led <= '1';
+            count := 0;
+        end if;
+    elsif rst = '1' then
+        count := 0;
+        led <= '1';
+    end if;
+    end process counter; 
+end rtl;
diff --git a/testsuite/synth/issue1074/testsuite.sh b/testsuite/synth/issue1074/testsuite.sh
new file mode 100755
index 000000000..0b2048804
--- /dev/null
+++ b/testsuite/synth/issue1074/testsuite.sh
@@ -0,0 +1,7 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+! synth blinky.vhdl -e 
+
+echo "Test successful"