testsuite/synth: add testcase for #1054

1 files changed, 20 insertions, 0 deletions

diff --git a/testsuite/synth/issue1054/simple01.vhdl b/testsuite/synth/issue1054/simple01.vhdl
new file mode 100644
index 000000000..28495def5
--- /dev/null
+++ b/testsuite/synth/issue1054/simple01.vhdl
@@ -0,0 +1,20 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity simple01 is
+  port (a, b, c : in std_logic;
+        z : out std_logic);
+end simple01;
+
+architecture behav of simple01 is
+begin
+  process(A, B, C)
+    variable temp : std_logic;
+  begin
+    if is_x (a) then
+      z <= b;
+    else
+      z <= b or c;
+    end if;
+  end process;
+end behav;