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

src/allocation.cc

 // 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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "allocation.h"
 
 #include <stdlib.h>  // For free, malloc.
-#include <string.h>  // For memcpy.
 #include "checks.h"
+#include "platform.h"
 #include "utils.h"
 
 namespace v8 {
 namespace internal {
 
 void* Malloced::New(size_t size) {
   void* result = malloc(size);
   if (result == NULL) {
     v8::internal::FatalProcessOutOfMemory("Malloced operator new");
   }
@@ skipping 35 matching lines @@
 void AllStatic::operator delete(void* p) {
   UNREACHABLE();
 }
 
 #endif
 
 
 char* StrDup(const char* str) {
   int length = StrLength(str);
   char* result = NewArray<char>(length + 1);
-  memcpy(result, str, length);
+  OS::MemCopy(result, str, length);
   result[length] = '\0';
   return result;
 }
 
 
 char* StrNDup(const char* str, int n) {
   int length = StrLength(str);
   if (n < length) length = n;
   char* result = NewArray<char>(length + 1);
-  memcpy(result, str, length);
+  OS::MemCopy(result, str, length);
   result[length] = '\0';
   return result;
 }
 
 
 void PreallocatedStorage::LinkTo(PreallocatedStorage* other) {
   next_ = other->next_;
   other->next_->previous_ = this;
   previous_ = other;
   other->next_ = this;
 }
 
 
 void PreallocatedStorage::Unlink() {
   next_->previous_ = previous_;
   previous_->next_ = next_;
 }
 
 
 PreallocatedStorage::PreallocatedStorage(size_t size)
   : size_(size) {
   previous_ = next_ = this;
 }
 
 } }  // namespace v8::internal