Add regression tests for package scoped function call errors

Check that an error is reported, rather than crashing, when trying to do a
package scoped function call when the function does not exist in the
package or is not a function.

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

ivtest/ivltests/sv_ps_function_fail1.v

@@ -0,0 +1,15 @@
+// Check that an error is reported when trying to call a package scoped function
+// that does not exist.
+
+package P;
+endpackage
+
+module test;
+
+  initial begin
+    int y;
+    y = P::f(10); // This should fail, f does not exist
+    $display("FAILED");
+  end
+
+endmodule

ivtest/ivltests/sv_ps_function_fail2.v

@@ -0,0 +1,16 @@
+// Check that trying to call a package scoped variable as a function results in
+// an error.
+
+package P;
+  int x;
+endpackage
+
+module test;
+
+  initial begin
+    int y;
+    y = P::x(10); // This should fail, x is not a function
+    $display("FAILED");
+  end
+
+endmodule

ivtest/ivltests/sv_ps_function_fail3.v

@@ -0,0 +1,17 @@
+// Check that an error is reported when trying to call a package scoped task as
+// a function.
+
+package P;
+  task t(int x);
+  endtask
+endpackage
+
+module test;
+
+  initial begin
+    int y;
+    y = P::t(10); // This should fail, t is a task
+    $display("FAILED");
+  end
+
+endmodule

ivtest/regress-sv.list

@@ -692,6 +692,9 @@ sv_ps_function4		normal,-g2009		ivltests
 sv_ps_function5		normal,-g2009		ivltests
 sv_ps_function6		normal,-g2009		ivltests
 sv_ps_function7		normal,-g2009		ivltests
+sv_ps_function_fail1	CE,-g2009		ivltests
+sv_ps_function_fail2	CE,-g2009		ivltests
+sv_ps_function_fail3	CE,-g2009		ivltests
 sv_ps_member_sel1	normal,-g2009		ivltests
 sv_ps_member_sel2	normal,-g2009		ivltests
 sv_ps_member_sel3	normal,-g2009		ivltests