Use internal memcpy when initializing code objects.

src/v8utils.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 104 matching lines @@
 
 template <typename T>
 inline Vector< Handle<Object> > HandleVector(v8::internal::Handle<T>* elms,
                                              int length) {
   return Vector< Handle<Object> >(
       reinterpret_cast<v8::internal::Handle<Object>*>(elms), length);
 }
 
 // Memory
 
-// Copies data from |src| to |dst|.  The data spans MUST not overlap.
+// Copies data from |src| to |dst|.  The data spans must not overlap.
 template <typename T>
 inline void CopyWords(T* dst, T* src, int num_words) {
   STATIC_ASSERT(sizeof(T) == kPointerSize);
   ASSERT(Min(dst, src) + num_words <= Max(dst, src));
   ASSERT(num_words > 0);
 
   // Use block copying memcpy if the segment we're copying is
   // enough to justify the extra call/setup overhead.
   static const int kBlockCopyLimit = 16;
 
   if (num_words >= kBlockCopyLimit) {
     memcpy(dst, src, num_words * kPointerSize);
   } else {
     int remaining = num_words;
     do {
       remaining--;
       *dst++ = *src++;
     } while (remaining > 0);
   }
 }
 
 
+// Copies data from |src| to |dst|.  The data spans must not overlap.
+template <typename T>
+inline void CopyBytes(T* dst, T* src, int num_bytes) {
+  STATIC_ASSERT(sizeof(T) == 1);
+  ASSERT(Min(dst, src) + num_bytes <= Max(dst, src));
+  ASSERT(num_bytes >= 0);
+  if (num_bytes == 0) return;
+
+  // Use block copying memcpy if the segment we're copying is
+  // enough to justify the extra call/setup overhead.
+  static const int kBlockCopyLimit = OS::kMinComplexMemCopy;
+
+  if (num_bytes >= kBlockCopyLimit) {
+    OS::MemCopy(dst, src, num_bytes);
+  } else {
+    int remaining = num_bytes;
+    do {
+      remaining--;
+      *dst++ = *src++;
+    } while (remaining > 0);
+  }
+}
+
+
 template <typename T, typename U>
 inline void MemsetPointer(T** dest, U* value, int counter) {
 #ifdef DEBUG
   T* a = NULL;
   U* b = NULL;
   a = b;  // Fake assignment to check assignability.
   USE(a);
 #endif  // DEBUG
 #if defined(V8_HOST_ARCH_IA32)
 #define STOS "stosl"
@@ skipping 116 matching lines @@
 
   // Add formatted contents like printf based on a va_list.
   void AddFormattedList(const char* format, va_list list);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8UTILS_H_