Add regression test for automatic terms in assignment patterns

Check that automatic variables referenced through an assignment pattern in a
procedural `force` statement are rejected.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

ivtest/ivltests/sv_assign_pattern_auto_force_fail.v

@@ -0,0 +1,19 @@
+// Check that assignment patterns cannot reference automatic variables in
+// procedural force statements.
+
+module test;
+
+  reg [3:0] result;
+
+  task automatic t;
+    input [3:0] value;
+    begin
+      force result = '{value[3], value[2], value[1], value[0]};
+    end
+  endtask
+
+  initial begin
+    t(4'ha);
+  end
+
+endmodule

ivtest/regress-vvp.list

@@ -259,6 +259,7 @@ sv_array_cassign9		vvp_tests/sv_array_cassign9.json
 sv_array_cassign10		vvp_tests/sv_array_cassign10.json
 sv_array_cassign_single	vvp_tests/sv_array_cassign_single.json
 sv_array_cassign_single_fail1	vvp_tests/sv_array_cassign_single_fail1.json
+sv_assign_pattern_auto_force_fail	vvp_tests/sv_assign_pattern_auto_force_fail.json
 sv_automatic_2state		vvp_tests/sv_automatic_2state.json
 sv_bad_member_lval_proc_fail	vvp_tests/sv_bad_member_lval_proc_fail.json
 sv_byte_array_string1		vvp_tests/sv_byte_array_string1.json

ivtest/vvp_tests/sv_assign_pattern_auto_force_fail.json

@@ -0,0 +1,5 @@
+{
+    "type"          : "CE",
+    "source"        : "sv_assign_pattern_auto_force_fail.v",
+    "iverilog-args" : [ "-g2005-sv" ]
+}