Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

src/heap-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 141 matching lines @@
   // String maps are all immortal immovable objects.
   reinterpret_cast<HeapObject*>(result)->set_map_no_write_barrier(map);
   // Set length and hash fields of the allocated string.
   String* answer = String::cast(result);
   answer->set_length(str.length());
   answer->set_hash_field(hash_field);
 
   ASSERT_EQ(size, answer->Size());
 
   // Fill in the characters.
-  memcpy(answer->address() + SeqOneByteString::kHeaderSize,
-         str.start(), str.length());
+  OS::MemCopy(answer->address() + SeqOneByteString::kHeaderSize,
+              str.start(), str.length());
 
   return answer;
 }
 
 
 MaybeObject* Heap::AllocateTwoByteInternalizedString(Vector<const uc16> str,
                                                      uint32_t hash_field) {
   if (str.length() > SeqTwoByteString::kMaxLength) {
     return Failure::OutOfMemoryException(0x3);
   }
@@ skipping 11 matching lines @@
 
   reinterpret_cast<HeapObject*>(result)->set_map(map);
   // Set length and hash fields of the allocated string.
   String* answer = String::cast(result);
   answer->set_length(str.length());
   answer->set_hash_field(hash_field);
 
   ASSERT_EQ(size, answer->Size());
 
   // Fill in the characters.
-  memcpy(answer->address() + SeqTwoByteString::kHeaderSize,
-         str.start(), str.length() * kUC16Size);
+  OS::MemCopy(answer->address() + SeqTwoByteString::kHeaderSize,
+              str.start(), str.length() * kUC16Size);
 
   return answer;
 }
 
 MaybeObject* Heap::CopyFixedArray(FixedArray* src) {
   return CopyFixedArrayWithMap(src, src->map());
 }
 
 
 MaybeObject* Heap::CopyFixedDoubleArray(FixedDoubleArray* src) {
@@ skipping 203 matching lines @@
         : OLD_DATA_SPACE;
   } else {
     return (type <= LAST_DATA_TYPE) ? OLD_DATA_SPACE : OLD_POINTER_SPACE;
   }
 }
 
 
 void Heap::CopyBlock(Address dst, Address src, int byte_size) {
   CopyWords(reinterpret_cast<Object**>(dst),
             reinterpret_cast<Object**>(src),
-            byte_size / kPointerSize);
+            static_cast<size_t>(byte_size / kPointerSize));
 }
 
 
 void Heap::MoveBlock(Address dst, Address src, int byte_size) {
   ASSERT(IsAligned(byte_size, kPointerSize));
 
   int size_in_words = byte_size / kPointerSize;
 
   if ((dst < src) || (dst >= (src + byte_size))) {
     Object** src_slot = reinterpret_cast<Object**>(src);
     Object** dst_slot = reinterpret_cast<Object**>(dst);
     Object** end_slot = src_slot + size_in_words;
 
     while (src_slot != end_slot) {
       *dst_slot++ = *src_slot++;
     }
   } else {
-    memmove(dst, src, byte_size);
+    OS::MemMove(dst, src, static_cast<size_t>(byte_size));
   }
 }
 
 
 void Heap::ScavengePointer(HeapObject** p) {
   ScavengeObject(p, *p);
 }
 
 
 void Heap::ScavengeObject(HeapObject** p, HeapObject* object) {
@@ skipping 419 matching lines @@
 AssertNoAllocation::~AssertNoAllocation() { }
 DisableAssertNoAllocation::DisableAssertNoAllocation() { }
 DisableAssertNoAllocation::~DisableAssertNoAllocation() { }
 
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_