Optimize member access with self

Let the compiler take the fast path when a member is superfluously accessed with `self.`.

modules/gdscript/gd_compiler.cpp

@@ -550,17 +550,25 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 
 					int index;
 					if (named) {
-#ifdef DEBUG_ENABLED
 						if (on->arguments[0]->type==GDParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
 
-							const Map<StringName,GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name);
+							GDParser::IdentifierNode* identifier = static_cast<GDParser::IdentifierNode*>(on->arguments[1]);
+							const Map<StringName,GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(identifier->name);
+
+#ifdef DEBUG_ENABLED
 							if (MI && MI->get().getter==codegen.function_node->name) {
 								String n = static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name;
 								_set_error("Must use '"+n+"' instead of 'self."+n+"' in getter.",on);
 								return -1;
 							}
-						}
 #endif
+
+							if (MI && MI->get().getter=="") {
+								// Faster than indexing self (as if no self. had been used)
+								return (MI->get().index)|(GDFunction::ADDR_TYPE_MEMBER<<GDFunction::ADDR_BITS);
+							}
+						}
+
 						index=codegen.get_name_map_pos(static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name);
 
 					} else {