Add regression tests for shadowing class properties

Check that class properties can be shadowed by local symbols in class
methods and also check that a package scoped identifier with the same name
as class property can be accessed in a class method.

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

ivtest/ivltests/sv_class_prop_shadow1.v

@@ -0,0 +1,25 @@
+// Check that class properties can be shadowed by a local symbol
+
+module test;
+
+  class C;
+    int x = 0;
+
+    task check;
+      int x; // This should shadow the class property
+      x = 10;
+      if (this.x == 0 && x === 10) begin
+        $display("PASSED");
+      end else begin
+        $display("FAILED");
+      end
+    endtask
+  endclass
+
+  initial begin
+    C c;
+    c = new;
+    c.check;
+  end
+
+endmodule

ivtest/ivltests/sv_class_prop_shadow2.v

@@ -0,0 +1,28 @@
+// Check that it is possible to access a package scoped identifier of the same
+// name of a class property inside a class method
+
+package P;
+  int x = 10;
+endpackage
+
+module test;
+
+  class C;
+    int x = 0;
+
+    task check;
+      if (P::x === 10) begin
+        $display("PASSED");
+      end else begin
+        $display("FAILED");
+      end
+    endtask
+  endclass
+
+  initial begin
+    C c;
+    c = new;
+    c.check;
+  end
+
+endmodule

ivtest/regress-sv.list

@@ -584,6 +584,8 @@ sv_class_method_lt_static2	CE,-g2009	ivltests
 sv_class_method_signed1	normal,-g2009		ivltests
 sv_class_method_signed2	normal,-g2009		ivltests
 sv_class_method_var_init	normal,-g2009	ivltests
+sv_class_prop_shadow1		normal,-g2009	ivltests
+sv_class_prop_shadow2		normal,-g2009	ivltests
 sv_class_property_signed1	normal,-g2009	ivltests
 sv_class_property_signed2	normal,-g2009	ivltests
 sv_class_property_signed3	normal,-g2009	ivltests

ivtest/regress-vlog95.list

@@ -432,6 +432,8 @@ sv_class_method_default2 CE,-g2009		ivltests
 sv_class_method_signed1	CE,-g2009,-pallowsigned=1	ivltests
 sv_class_method_signed2	CE,-g2009,-pallowsigned=1	ivltests
 sv_class_method_var_init	CE,-g2009,-pallowsigned=1	ivltests
+sv_class_prop_shadow1		CE,-g2009	ivltests
+sv_class_prop_shadow2		CE,-g2009	ivltests
 sv_class_property_signed1	CE,-g2009,-pallowsigned=1	ivltests
 sv_class_property_signed2	CE,-g2009,-pallowsigned=1	ivltests
 sv_class_property_signed3	CE,-g2009,-pallowsigned=1	ivltests