Merge branch 'v0.10'

Conflicts:
	deps/v8/src/elements-kind.cc
	deps/v8/src/elements-kind.h
	deps/v8/src/hydrogen-instructions.h
	deps/v8/src/hydrogen.cc
	deps/v8/src/lithium.cc
	deps/v8/src/lithium.h

6 files changed, 39 insertions, 32 deletions

diff --git a/deps/v8/src/elements-kind.cc b/deps/v8/src/elements-kind.cc
index 213aa35c8..8129051a6 100644
--- a/deps/v8/src/elements-kind.cc
+++ b/deps/v8/src/elements-kind.cc
@@ -35,6 +35,36 @@ namespace v8 {
 namespace internal {
 
 
+int ElementsKindToShiftSize(ElementsKind elements_kind) {
+  switch (elements_kind) {
+    case EXTERNAL_BYTE_ELEMENTS:
+    case EXTERNAL_PIXEL_ELEMENTS:
+    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+      return 0;
+    case EXTERNAL_SHORT_ELEMENTS:
+    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+      return 1;
+    case EXTERNAL_INT_ELEMENTS:
+    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+    case EXTERNAL_FLOAT_ELEMENTS:
+      return 2;
+    case EXTERNAL_DOUBLE_ELEMENTS:
+    case FAST_DOUBLE_ELEMENTS:
+    case FAST_HOLEY_DOUBLE_ELEMENTS:
+      return 3;
+    case FAST_SMI_ELEMENTS:
+    case FAST_ELEMENTS:
+    case FAST_HOLEY_SMI_ELEMENTS:
+    case FAST_HOLEY_ELEMENTS:
+    case DICTIONARY_ELEMENTS:
+    case NON_STRICT_ARGUMENTS_ELEMENTS:
+      return kPointerSizeLog2;
+  }
+  UNREACHABLE();
+  return 0;
+}
+
+
 const char* ElementsKindToString(ElementsKind kind) {
   ElementsAccessor* accessor = ElementsAccessor::ForKind(kind);
   return accessor->name();
diff --git a/deps/v8/src/elements-kind.h b/deps/v8/src/elements-kind.h
index da151924b..69b405781 100644
--- a/deps/v8/src/elements-kind.h
+++ b/deps/v8/src/elements-kind.h
@@ -77,6 +77,7 @@ const int kElementsKindCount = LAST_ELEMENTS_KIND - FIRST_ELEMENTS_KIND + 1;
 const int kFastElementsKindCount = LAST_FAST_ELEMENTS_KIND -
     FIRST_FAST_ELEMENTS_KIND + 1;
 
+int ElementsKindToShiftSize(ElementsKind elements_kind);
 const char* ElementsKindToString(ElementsKind kind);
 void PrintElementsKind(FILE* out, ElementsKind kind);
 
diff --git a/deps/v8/src/hydrogen-dehoist.cc b/deps/v8/src/hydrogen-dehoist.cc
index 67e671899..bdf2cfb25 100644
--- a/deps/v8/src/hydrogen-dehoist.cc
+++ b/deps/v8/src/hydrogen-dehoist.cc
@@ -53,7 +53,7 @@ static void DehoistArrayIndex(ArrayInstructionInterface* array_operation) {
   int32_t value = constant->Integer32Value() * sign;
   // We limit offset values to 30 bits because we want to avoid the risk of
   // overflows when the offset is added to the object header size.
-  if (value >= 1 << 30 || value < 0) return;
+  if (value >= 1 << array_operation->MaxIndexOffsetBits() || value < 0) return;
   array_operation->SetKey(subexpression);
   if (binary_operation->HasNoUses()) {
     binary_operation->DeleteAndReplaceWith(NULL);
diff --git a/deps/v8/src/hydrogen-instructions.h b/deps/v8/src/hydrogen-instructions.h
index 80773bf14..10c4b945f 100644
--- a/deps/v8/src/hydrogen-instructions.h
+++ b/deps/v8/src/hydrogen-instructions.h
@@ -6070,6 +6070,7 @@ class ArrayInstructionInterface {
   virtual HValue* GetKey() = 0;
   virtual void SetKey(HValue* key) = 0;
   virtual void SetIndexOffset(uint32_t index_offset) = 0;
+  virtual int MaxIndexOffsetBits() = 0;
   virtual bool IsDehoisted() = 0;
   virtual void SetDehoisted(bool is_dehoisted) = 0;
   virtual ~ArrayInstructionInterface() { };
@@ -6109,6 +6110,9 @@ class HLoadKeyed V8_FINAL
   void SetIndexOffset(uint32_t index_offset) {
     bit_field_ = IndexOffsetField::update(bit_field_, index_offset);
   }
+  virtual int MaxIndexOffsetBits() {
+    return kBitsForIndexOffset;
+  }
   HValue* GetKey() { return key(); }
   void SetKey(HValue* key) { SetOperandAt(1, key); }
   bool IsDehoisted() { return IsDehoistedField::decode(bit_field_); }
@@ -6492,6 +6496,9 @@ class HStoreKeyed V8_FINAL
   ElementsKind elements_kind() const { return elements_kind_; }
   uint32_t index_offset() { return index_offset_; }
   void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
+  virtual int MaxIndexOffsetBits() {
+    return 31 - ElementsKindToShiftSize(elements_kind_);
+  }
   HValue* GetKey() { return key(); }
   void SetKey(HValue* key) { SetOperandAt(1, key); }
   bool IsDehoisted() { return is_dehoisted_; }
diff --git a/deps/v8/src/lithium.cc b/deps/v8/src/lithium.cc
index 966afa9c0..b66a64f90 100644
--- a/deps/v8/src/lithium.cc
+++ b/deps/v8/src/lithium.cc
@@ -233,36 +233,6 @@ void LPointerMap::PrintTo(StringStream* stream) {
 }
 
 
-int ElementsKindToShiftSize(ElementsKind elements_kind) {
-  switch (elements_kind) {
-    case EXTERNAL_BYTE_ELEMENTS:
-    case EXTERNAL_PIXEL_ELEMENTS:
-    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      return 0;
-    case EXTERNAL_SHORT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      return 1;
-    case EXTERNAL_INT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-    case EXTERNAL_FLOAT_ELEMENTS:
-      return 2;
-    case EXTERNAL_DOUBLE_ELEMENTS:
-    case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS:
-      return 3;
-    case FAST_SMI_ELEMENTS:
-    case FAST_ELEMENTS:
-    case FAST_HOLEY_SMI_ELEMENTS:
-    case FAST_HOLEY_ELEMENTS:
-    case DICTIONARY_ELEMENTS:
-    case NON_STRICT_ARGUMENTS_ELEMENTS:
-      return kPointerSizeLog2;
-  }
-  UNREACHABLE();
-  return 0;
-}
-
-
 int StackSlotOffset(int index) {
   if (index >= 0) {
     // Local or spill slot. Skip the frame pointer, function, and
diff --git a/deps/v8/src/lithium.h b/deps/v8/src/lithium.h
index 4f8408783..d4395f2d7 100644
--- a/deps/v8/src/lithium.h
+++ b/deps/v8/src/lithium.h
@@ -791,7 +791,6 @@ class LChunk : public ZoneObject {
 };
 
 
-int ElementsKindToShiftSize(ElementsKind elements_kind);
 int StackSlotOffset(int index);
 
 enum NumberUntagDMode {