Add regression test for task port range mismatch

Check that a range mismatch is detected for non-ANSI task ports when
port direction and data type are declared separately.

An error should be reported and no crash should occur.

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

ivtest/ivltests/task_port_range_mismatch.v

@@ -0,0 +1,18 @@
+// Check that range mismatches between port direction and data type are detected
+// for task ports. An error should be reported and no crash should occur.
+
+module test;
+
+  task t;
+    input [1:0] x;
+    reg [3:0] x;
+    reg [3:0] y;
+    y = x;
+    $display("FAILED");
+  endtask
+
+  initial begin
+    t(4'b1001);
+  end
+
+endmodule

ivtest/regress-vlg.list

@@ -1610,6 +1610,7 @@ task_noop		normal			ivltests # Task with no contents.
 task_noop2		CO			ivltests # Task *really* with no contents.
 task_omemw2		normal			ivltests
 task_omemw3		CO			ivltests # Pass bit selected from vector to task
+task_port_range_mismatch CE			ivltests
 task_port_size		normal			ivltests # truncate task port connections
 task_scope		normal			ivltests
 tern1			normal			ivltests # Finds problems with ?: using different sizes