Add the native intrinsic TypedData_setRange to optimize the setRange call when the destination and …

runtime/vm/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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 4973 matching lines @@
 
   static intptr_t MaxElements(intptr_t class_id) {
     ASSERT(RawObject::IsTypedDataClassId(class_id));
     return (kSmiMax / ElementSizeInBytes(class_id));
   }
 
   static RawTypedData* New(intptr_t class_id,
                            intptr_t len,
                            Heap::Space space = Heap::kNew);
 
+  static void Copy(const TypedData& dst,
+                   intptr_t dst_offset_in_bytes,
+                   const TypedData& src,
+                   intptr_t src_offset_in_bytes,
+                   intptr_t length_in_bytes);
+
  protected:
   void SetLength(intptr_t value) const {
     raw_ptr()->length_ = Smi::New(value);
   }
 
  private:
   static const intptr_t element_size[];
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(TypedData, Instance);
   friend class Class;
@@ skipping 68 matching lines @@
   static intptr_t MaxElements(intptr_t class_id) {
     ASSERT(RawObject::IsExternalTypedDataClassId(class_id));
     return (kSmiMax / ElementSizeInBytes(class_id));
   }
 
   static RawExternalTypedData* New(intptr_t class_id,
                                    uint8_t* data,
                                    intptr_t len,
                                    Heap::Space space = Heap::kNew);
 
+  static void Copy(const ExternalTypedData& dst,
+                   intptr_t dst_offset_in_bytes,
+                   const ExternalTypedData& src,
+                   intptr_t src_offset_in_bytes,
+                   intptr_t length_in_bytes);
+
  protected:
   void SetLength(intptr_t value) const {
     raw_ptr()->length_ = Smi::New(value);
   }
 
   void SetData(uint8_t* data) const {
     raw_ptr()->data_ = data;
   }
 
   void SetPeer(void* peer) const {
@@ skipping 1741 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_