Add regression tests for attribute names matching type identifiers

Check that a standard attribute name can match a visible typedef. Also check
that the global `$attribute` extension can target a primitive whose name is
visible as a type identifier.

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

ivtest/ivltests/sv_type_identifier_attribute_name.v

@@ -0,0 +1,12 @@
+// Check that attribute names can match visible type identifiers.
+
+typedef int ATTR;
+
+(* ATTR = 1 *)
+module test;
+
+  initial begin
+    $display("PASSED");
+  end
+
+endmodule

ivtest/ivltests/sv_type_identifier_attribute_target.v

@@ -0,0 +1,23 @@
+// Check that $attribute targets can match visible type identifiers.
+
+primitive ATTR_TYPE (out, in);
+  output out;
+  input in;
+
+  table
+    0 : 0;
+    1 : 1;
+  endtable
+endprimitive
+
+typedef int ATTR_TYPE;
+
+$attribute(ATTR_TYPE, "test", "true")
+
+module test;
+
+  initial begin
+    $display("PASSED");
+  end
+
+endmodule

ivtest/regress-vvp.list

@@ -392,6 +392,8 @@ sv_soft_packed_union		vvp_tests/sv_soft_packed_union.json
 sv_soft_packed_union_fail1	vvp_tests/sv_soft_packed_union_fail1.json
 sv_super_member_fail		vvp_tests/sv_super_member_fail.json
 sv_type_identifier_ams_name_fields	vvp_tests/sv_type_identifier_ams_name_fields.json
+sv_type_identifier_attribute_name	vvp_tests/sv_type_identifier_attribute_name.json
+sv_type_identifier_attribute_target	vvp_tests/sv_type_identifier_attribute_target.json
 sv_type_identifier_block_label_name	vvp_tests/sv_type_identifier_block_label_name.json
 sv_type_identifier_config_name	vvp_tests/sv_type_identifier_config_name.json
 sv_type_identifier_enum_item_name	vvp_tests/sv_type_identifier_enum_item_name.json

ivtest/vvp_tests/sv_type_identifier_attribute_name.json

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

ivtest/vvp_tests/sv_type_identifier_attribute_target.json

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