Cache number of type arguments in class object instead of recalculating it.

runtime/vm/raw_object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 478 matching lines @@
   RawFunction* signature_function_;  // Associated function for signature class.
   RawArray* constants_;  // Canonicalized values of this class.
   RawArray* canonical_types_;  // Canonicalized types of this class.
   RawArray* invocation_dispatcher_cache_;   // Cache for dispatcher functions.
   RawCode* allocation_stub_;  // Stub code for allocation of instances.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->allocation_stub_);
   }
 
   cpp_vtable handle_vtable_;
+  intptr_t id_;  // Class Id, also index in the class table.
+  intptr_t token_pos_;
   intptr_t instance_size_in_words_;  // Size if fixed len or 0 if variable len.
-  intptr_t id_;  // Class Id, also index in the class table.
   intptr_t type_arguments_field_offset_in_words_;  // Offset of type args fld.
   intptr_t next_field_offset_in_words_;  // Offset of the next instance field.
-  intptr_t num_native_fields_;  // Number of native fields in class.
-  intptr_t token_pos_;
+  int16_t num_type_arguments_;  // Number of type arguments in flatten vector.
+  int16_t num_own_type_arguments_;  // Number of non-overlapping type arguments.
+  uint16_t num_native_fields_;  // Number of native fields in class.
   uint16_t state_bits_;
 
   friend class Instance;
   friend class Object;
   friend class RawInstance;
   friend class RawInstructions;
   friend class RawType;  // TODO(regis): To temporarily print unfinalized types.
   friend class RawTypeParameter;  // To temporarily print unfinalized types.
   friend class SnapshotReader;
 };
@@ skipping 1203 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 12);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 13);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 12);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_