Add regression test for event names shadowing type identifiers

Check that event declarations can use visible type identifiers as event names.
Also check that the resulting named event can be triggered and waited on.

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

ivtest/ivltests/sv_type_identifier_event_name.v

@@ -0,0 +1,31 @@
+// Check that event names can shadow visible type identifiers.
+
+typedef int T;
+
+module test;
+
+  reg failed;
+  reg seen;
+
+  event T;
+
+  initial begin
+    failed = 1'b0;
+    seen = 1'b0;
+
+    #1 -> T;
+    #1;
+
+    if (seen !== 1'b1) begin
+      $display("FAILED(%0d). Event T was not triggered", `__LINE__);
+      failed = 1'b1;
+    end
+
+    if (!failed) begin
+      $display("PASSED");
+    end
+  end
+
+  always @T seen = 1'b1;
+
+endmodule

ivtest/regress-vvp.list

@@ -389,6 +389,7 @@ sv_type_identifier_ams_name_fields	vvp_tests/sv_type_identifier_ams_name_fields.
 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
+sv_type_identifier_event_name	vvp_tests/sv_type_identifier_event_name.json
 sv_type_identifier_foreach_name	vvp_tests/sv_type_identifier_foreach_name.json
 sv_type_identifier_fork_label_name	vvp_tests/sv_type_identifier_fork_label_name.json
 sv_type_identifier_function_name	vvp_tests/sv_type_identifier_function_name.json

ivtest/vvp_tests/sv_type_identifier_event_name.json

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