Precompilation: drop unused types and type arguments and empty classes and libraries.

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/atomic.h"
 #include "vm/globals.h"
@@ skipping 654 matching lines @@
   RAW_HEAP_OBJECT_IMPLEMENTATION(Class);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   NOT_IN_PRODUCT(RawString* user_name_);
   RawArray* functions_;
   RawArray* functions_hash_table_;
   RawArray* fields_;
   RawArray* offset_in_words_to_field_;
   RawArray* interfaces_;  // Array of AbstractType.
-  RawGrowableObjectArray* direct_subclasses_;  // Array of Class.
   RawScript* script_;
   RawLibrary* library_;
   RawTypeArguments* type_parameters_;  // Array of TypeParameter.
   RawAbstractType* super_type_;
   RawType* mixin_;  // Generic mixin type, e.g. M<T>, not M<int>.
   RawFunction* signature_function_;  // Associated function for typedef class.
   RawArray* constants_;  // Canonicalized values of this class.
   RawObject* canonical_types_;  // An array of canonicalized types of this class
                                 // or the canonical type.
   RawArray* invocation_dispatcher_cache_;  // Cache for dispatcher functions.
+  RawCode* allocation_stub_;  // Stub code for allocation of instances.
+  RawGrowableObjectArray* direct_subclasses_;  // Array of Class.
   RawArray* cha_codes_;  // CHA optimized codes.
-  RawCode* allocation_stub_;  // Stub code for allocation of instances.
   RawObject** to() {
-    return reinterpret_cast<RawObject**>(&ptr()->allocation_stub_);
+    return reinterpret_cast<RawObject**>(&ptr()->cha_codes_);
   }
 
   cpp_vtable handle_vtable_;
   TokenPosition token_pos_;
   int32_t instance_size_in_words_;  // Size if fixed len or 0 if variable len.
   int32_t type_arguments_field_offset_in_words_;  // Offset of type args fld.
   int32_t next_field_offset_in_words_;  // Offset of the next instance field.
   classid_t id_;  // Class Id, also index in the class table.
   int16_t num_type_arguments_;  // Number of type arguments in flattened vector.
   int16_t num_own_type_arguments_;  // Number of non-overlapping type arguments.
@@ skipping 848 matching lines @@
 class RawInstance : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Instance);
 };
 
 
 class RawLibraryPrefix : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LibraryPrefix);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;               // Library prefix name.
+  RawLibrary* importer_;          // Library which declares this prefix.
+  RawObject** to_precompiled_snapshot() {
+    return reinterpret_cast<RawObject**>(&ptr()->importer_);
+  }
   RawArray* imports_;             // Libraries imported with this prefix.
-  RawLibrary* importer_;          // Library which declares this prefix.
   RawArray* dependent_code_;      // Code that refers to deferred, unloaded
                                   // library prefix.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->dependent_code_);
   }
   uint16_t num_imports_;          // Number of library entries in libraries_.
   bool is_deferred_load_;
   bool is_loaded_;
 };
 
@@ skipping 778 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_