Upgrade V8 to 2.2.3.1

1 files changed, 22 insertions, 1 deletions

diff --git a/deps/v8/src/utils.h b/deps/v8/src/utils.h
index 8ff1f9b1c8..fa249475ae 100644
--- a/deps/v8/src/utils.h
+++ b/deps/v8/src/utils.h
@@ -597,6 +597,27 @@ static inline void MemsetPointer(T** dest, T* value, int counter) {
 }
 
 
+// Copies data from |src| to |dst|.  The data spans MUST not overlap.
+inline void CopyWords(Object** dst, Object** src, int num_words) {
+  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);
+  }
+}
+
+
 // Calculate 10^exponent.
 int TenToThe(int exponent);
 
@@ -636,7 +657,7 @@ inline Dest BitCast(const Source& source) {
   return dest;
 }
 
-
 } }  // namespace v8::internal
 
+
 #endif  // V8_UTILS_H_