3 files changed, 44 insertions, 0 deletions
diff --git a/testsuite/synth/dff01/dff06.vhdl b/testsuite/synth/dff01/dff06.vhdl
new file mode 100644
index 000000000..33f5590a6
--- /dev/null
+++ b/testsuite/synth/dff01/dff06.vhdl
@@ -0,0 +1,21 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity dff06 is
+  port (q : out std_logic;
+        d : std_logic;
+        clk : std_logic);
+end dff06;
+
+architecture behav of dff06 is
+begin
+  process (clk) is
+    variable a, b : std_logic;
+  begin
+    if rising_edge (clk) then
+      q <= b;
+      b := a;
+      a := d;
+    end if;
+  end process;
+end behav;
diff --git a/testsuite/synth/dff01/dff07.vhdl b/testsuite/synth/dff01/dff07.vhdl
new file mode 100644
index 000000000..a90bbc8ab
--- /dev/null
+++ b/testsuite/synth/dff01/dff07.vhdl
@@ -0,0 +1,21 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity dff07 is
+  port (q : out std_logic;
+        d : std_logic;
+        clk : std_logic);
+end dff07;
+
+architecture behav of dff07 is
+begin
+  process (clk) is
+    variable a, b : std_logic;
+  begin
+    if rising_edge (clk) then
+      a := d;
+      b := a;
+      q <= b;
+    end if;
+  end process;
+end behav;
diff --git a/testsuite/synth/dff01/testsuite.sh b/testsuite/synth/dff01/testsuite.sh
index 12c11db33..dc50aa0ff 100755
--- a/testsuite/synth/dff01/testsuite.sh
+++ b/testsuite/synth/dff01/testsuite.sh
@@ -7,6 +7,8 @@ synth dff02.vhdl -e dff02
 synth dff03.vhdl -e dff03
 synth dff04.vhdl -e dff04
 synth dff05.vhdl -e dff05
+synth dff06.vhdl -e dff06
+synth dff07.vhdl -e dff07
 
 clean