Upgrade v8 to 3.1.8.10

18 files changed, 549 insertions, 420 deletions

diff --git a/deps/v8/src/accessors.cc b/deps/v8/src/accessors.cc
index 18264254b..8cbdc09ed 100644
--- a/deps/v8/src/accessors.cc
+++ b/deps/v8/src/accessors.cc
@@ -566,8 +566,8 @@ static Address SlotAddress(JavaScriptFrame* frame, int slot_index) {
     const int offset = JavaScriptFrameConstants::kLocal0Offset;
     return frame->fp() + offset - (slot_index * kPointerSize);
   } else {
-    const int offset = JavaScriptFrameConstants::kReceiverOffset;
-    return frame->caller_sp() + offset + (slot_index * kPointerSize);
+    const int offset = JavaScriptFrameConstants::kSavedRegistersOffset;
+    return frame->fp() + offset - ((slot_index + 1) * kPointerSize);
   }
 }
 
@@ -791,14 +791,16 @@ MaybeObject* Accessors::FunctionGetArguments(Object* object, void*) {
 
       // Get the number of arguments and construct an arguments object
       // mirror for the right frame.
-      const int length = frame->GetProvidedParametersCount();
+      const int length = frame->ComputeParametersCount();
       Handle<JSObject> arguments = Factory::NewArgumentsObject(function,
                                                                length);
       Handle<FixedArray> array = Factory::NewFixedArray(length);
 
       // Copy the parameters to the arguments object.
       ASSERT(array->length() == length);
-      for (int i = 0; i < length; i++) array->set(i, frame->GetParameter(i));
+      for (int i = 0; i < length; i++) {
+        array->set(i, frame->GetParameter(i));
+      }
       arguments->set_elements(*array);
 
       // Return the freshly allocated arguments object.
diff --git a/deps/v8/src/arm/lithium-codegen-arm.cc b/deps/v8/src/arm/lithium-codegen-arm.cc
index c0f5800bf..1ec2b9842 100644
--- a/deps/v8/src/arm/lithium-codegen-arm.cc
+++ b/deps/v8/src/arm/lithium-codegen-arm.cc
@@ -465,11 +465,19 @@ void LCodeGen::AddToTranslation(Translation* translation,
 void LCodeGen::CallCode(Handle<Code> code,
                         RelocInfo::Mode mode,
                         LInstruction* instr) {
+  CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT);
+}
+
+
+void LCodeGen::CallCodeGeneric(Handle<Code> code,
+                               RelocInfo::Mode mode,
+                               LInstruction* instr,
+                               SafepointMode safepoint_mode) {
   ASSERT(instr != NULL);
   LPointerMap* pointers = instr->pointer_map();
   RecordPosition(pointers->position());
   __ Call(code, mode);
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, safepoint_mode);
 }
 
 
@@ -482,11 +490,21 @@ void LCodeGen::CallRuntime(Runtime::Function* function,
   RecordPosition(pointers->position());
 
   __ CallRuntime(function, num_arguments);
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT);
 }
 
 
-void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
+void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id,
+                                       int argc,
+                                       LInstruction* instr) {
+  __ CallRuntimeSaveDoubles(id);
+  RecordSafepointWithRegisters(
+      instr->pointer_map(), argc, Safepoint::kNoDeoptimizationIndex);
+}
+
+
+void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr,
+                                          SafepointMode safepoint_mode) {
   // Create the environment to bailout to. If the call has side effects
   // execution has to continue after the call otherwise execution can continue
   // from a previous bailout point repeating the call.
@@ -498,8 +516,16 @@ void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
   }
 
   RegisterEnvironmentForDeoptimization(deoptimization_environment);
-  RecordSafepoint(instr->pointer_map(),
-                  deoptimization_environment->deoptimization_index());
+  if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) {
+    RecordSafepoint(instr->pointer_map(),
+                    deoptimization_environment->deoptimization_index());
+  } else {
+    ASSERT(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);
+    RecordSafepointWithRegisters(
+        instr->pointer_map(),
+        0,
+        deoptimization_environment->deoptimization_index());
+  }
 }
 
 
@@ -631,6 +657,8 @@ void LCodeGen::RecordSafepoint(
     Safepoint::Kind kind,
     int arguments,
     int deoptimization_index) {
+  ASSERT(expected_safepoint_kind_ == kind);
+
   const ZoneList<LOperand*>* operands = pointers->operands();
   Safepoint safepoint = safepoints_.DefineSafepoint(masm(),
       kind, arguments, deoptimization_index);
@@ -951,7 +979,7 @@ void LCodeGen::DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr,
   Register left = ToRegister(instr->InputAt(0));
   Register right = ToRegister(instr->InputAt(1));
 
-  __ PushSafepointRegistersAndDoubles();
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegistersAndDoubles);
   // Move left to r1 and right to r0 for the stub call.
   if (left.is(r1)) {
     __ Move(r0, right);
@@ -973,7 +1001,6 @@ void LCodeGen::DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr,
                                          Safepoint::kNoDeoptimizationIndex);
   // Overwrite the stored value of r0 with the result of the stub.
   __ StoreToSafepointRegistersAndDoublesSlot(r0, r0);
-  __ PopSafepointRegistersAndDoubles();
 }
 
 
@@ -1369,11 +1396,8 @@ void LCodeGen::EmitGoto(int block, LDeferredCode* deferred_stack_check) {
 
 
 void LCodeGen::DoDeferredStackCheck(LGoto* instr) {
-  __ PushSafepointRegisters();
-  __ CallRuntimeSaveDoubles(Runtime::kStackGuard);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
-  __ PopSafepointRegisters();
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
+  CallRuntimeFromDeferred(Runtime::kStackGuard, 0, instr);
 }
 
 
@@ -1972,7 +1996,7 @@ void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
       flags | InstanceofStub::kReturnTrueFalseObject);
   InstanceofStub stub(flags);
 
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
 
   // Get the temp register reserved by the instruction. This needs to be r4 as
   // its slot of the pushing of safepoint registers is used to communicate the
@@ -1987,12 +2011,13 @@ void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
   __ BlockConstPoolFor(kAdditionalDelta);
   __ mov(temp, Operand(delta * kPointerSize));
   __ StoreToSafepointRegisterSlot(temp, temp);
-  CallCode(stub.GetCode(),  RelocInfo::CODE_TARGET, instr);
+  CallCodeGeneric(stub.GetCode(),
+                  RelocInfo::CODE_TARGET,
+                  instr,
+                  RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);
   // Put the result value into the result register slot and
   // restore all registers.
   __ StoreToSafepointRegisterSlot(result, result);
-
-  __ PopSafepointRegisters();
 }
 
 
@@ -2456,7 +2481,7 @@ void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
   __ Call(ip);
 
   // Setup deoptimization.
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT);
 
   // Restore context.
   __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
@@ -2494,44 +2519,43 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
 
   // Input is negative. Reverse its sign.
   // Preserve the value of all registers.
-  __ PushSafepointRegisters();
+  {
+    PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
 
-  // Registers were saved at the safepoint, so we can use
-  // many scratch registers.
-  Register tmp1 = input.is(r1) ? r0 : r1;
-  Register tmp2 = input.is(r2) ? r0 : r2;
-  Register tmp3 = input.is(r3) ? r0 : r3;
-  Register tmp4 = input.is(r4) ? r0 : r4;
+    // Registers were saved at the safepoint, so we can use
+    // many scratch registers.
+    Register tmp1 = input.is(r1) ? r0 : r1;
+    Register tmp2 = input.is(r2) ? r0 : r2;
+    Register tmp3 = input.is(r3) ? r0 : r3;
+    Register tmp4 = input.is(r4) ? r0 : r4;
 
-  // exponent: floating point exponent value.
+    // exponent: floating point exponent value.
 
-  Label allocated, slow;
-  __ LoadRoot(tmp4, Heap::kHeapNumberMapRootIndex);
-  __ AllocateHeapNumber(tmp1, tmp2, tmp3, tmp4, &slow);
-  __ b(&allocated);
+    Label allocated, slow;
+    __ LoadRoot(tmp4, Heap::kHeapNumberMapRootIndex);
+    __ AllocateHeapNumber(tmp1, tmp2, tmp3, tmp4, &slow);
+    __ b(&allocated);
 
-  // Slow case: Call the runtime system to do the number allocation.
-  __ bind(&slow);
+    // Slow case: Call the runtime system to do the number allocation.
+    __ bind(&slow);
 
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
-  // Set the pointer to the new heap number in tmp.
-  if (!tmp1.is(r0)) __ mov(tmp1, Operand(r0));
-  // Restore input_reg after call to runtime.
-  __ LoadFromSafepointRegisterSlot(input, input);
-  __ ldr(exponent, FieldMemOperand(input, HeapNumber::kExponentOffset));
+    CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
+    // Set the pointer to the new heap number in tmp.
+    if (!tmp1.is(r0)) __ mov(tmp1, Operand(r0));
+    // Restore input_reg after call to runtime.
+    __ LoadFromSafepointRegisterSlot(input, input);
+    __ ldr(exponent, FieldMemOperand(input, HeapNumber::kExponentOffset));
 
-  __ bind(&allocated);
-  // exponent: floating point exponent value.
-  // tmp1: allocated heap number.
-  __ bic(exponent, exponent, Operand(HeapNumber::kSignMask));
-  __ str(exponent, FieldMemOperand(tmp1, HeapNumber::kExponentOffset));
-  __ ldr(tmp2, FieldMemOperand(input, HeapNumber::kMantissaOffset));
-  __ str(tmp2, FieldMemOperand(tmp1, HeapNumber::kMantissaOffset));
+    __ bind(&allocated);
+    // exponent: floating point exponent value.
+    // tmp1: allocated heap number.
+    __ bic(exponent, exponent, Operand(HeapNumber::kSignMask));
+    __ str(exponent, FieldMemOperand(tmp1, HeapNumber::kExponentOffset));
+    __ ldr(tmp2, FieldMemOperand(input, HeapNumber::kMantissaOffset));
+    __ str(tmp2, FieldMemOperand(tmp1, HeapNumber::kMantissaOffset));
 
-  __ StoreToSafepointRegisterSlot(tmp1, input);
-  __ PopSafepointRegisters();
+    __ StoreToSafepointRegisterSlot(tmp1, input);
+  }
 
   __ bind(&done);
 }
@@ -2993,7 +3017,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
   // contained in the register pointer map.
   __ mov(result, Operand(0));
 
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
   __ push(string);
   // Push the index as a smi. This is safe because of the checks in
   // DoStringCharCodeAt above.
@@ -3006,15 +3030,12 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ SmiTag(index);
     __ push(index);
   }
-  __ CallRuntimeSaveDoubles(Runtime::kStringCharCodeAt);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 2, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
   if (FLAG_debug_code) {
     __ AbortIfNotSmi(r0);
   }
   __ SmiUntag(r0);
   __ StoreToSafepointRegisterSlot(r0, result);
-  __ PopSafepointRegisters();
 }
 
 
@@ -3070,7 +3091,7 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   SwVfpRegister flt_scratch = s0;
 
   // Preserve the value of all registers.
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
 
   // There was overflow, so bits 30 and 31 of the original integer
   // disagree. Try to allocate a heap number in new space and store
@@ -3095,9 +3116,7 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   // integer value.
   __ mov(ip, Operand(0));
   __ StoreToSafepointRegisterSlot(ip, reg);
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   if (!reg.is(r0)) __ mov(reg, r0);
 
   // Done. Put the value in dbl_scratch into the value of the allocated heap
@@ -3106,7 +3125,6 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   __ sub(ip, reg, Operand(kHeapObjectTag));
   __ vstr(dbl_scratch, ip, HeapNumber::kValueOffset);
   __ StoreToSafepointRegisterSlot(reg, reg);
-  __ PopSafepointRegisters();
 }
 
 
@@ -3146,12 +3164,9 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   Register reg = ToRegister(instr->result());
   __ mov(reg, Operand(0));
 
-  __ PushSafepointRegisters();
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   __ StoreToSafepointRegisterSlot(r0, reg);
-  __ PopSafepointRegisters();
 }
 
 
diff --git a/deps/v8/src/arm/lithium-codegen-arm.h b/deps/v8/src/arm/lithium-codegen-arm.h
index a26f6311e..393b6423e 100644
--- a/deps/v8/src/arm/lithium-codegen-arm.h
+++ b/deps/v8/src/arm/lithium-codegen-arm.h
@@ -57,7 +57,8 @@ class LCodeGen BASE_EMBEDDED {
         status_(UNUSED),
         deferred_(8),
         osr_pc_offset_(-1),
-        resolver_(this) {
+        resolver_(this),
+        expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
@@ -167,12 +168,24 @@ class LCodeGen BASE_EMBEDDED {
   bool GenerateDeferredCode();
   bool GenerateSafepointTable();
 
+  enum SafepointMode {
+    RECORD_SIMPLE_SAFEPOINT,
+    RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
+  };
+
   void CallCode(Handle<Code> code,
                 RelocInfo::Mode mode,
                 LInstruction* instr);
+
+  void CallCodeGeneric(Handle<Code> code,
+                       RelocInfo::Mode mode,
+                       LInstruction* instr,
+                       SafepointMode safepoint_mode);
+
   void CallRuntime(Runtime::Function* function,
                    int num_arguments,
                    LInstruction* instr);
+
   void CallRuntime(Runtime::FunctionId id,
                    int num_arguments,
                    LInstruction* instr) {
@@ -180,6 +193,10 @@ class LCodeGen BASE_EMBEDDED {
     CallRuntime(function, num_arguments, instr);
   }
 
+  void CallRuntimeFromDeferred(Runtime::FunctionId id,
+                               int argc,
+                               LInstruction* instr);
+
   // Generate a direct call to a known function.  Expects the function
   // to be in edi.
   void CallKnownFunction(Handle<JSFunction> function,
@@ -188,7 +205,9 @@ class LCodeGen BASE_EMBEDDED {
 
   void LoadHeapObject(Register result, Handle<HeapObject> object);
 
-  void RegisterLazyDeoptimization(LInstruction* instr);
+  void RegisterLazyDeoptimization(LInstruction* instr,
+                                  SafepointMode safepoint_mode);
+
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
   void DeoptimizeIf(Condition cc, LEnvironment* environment);
 
@@ -275,6 +294,48 @@ class LCodeGen BASE_EMBEDDED {
   // Compiler from a set of parallel moves to a sequential list of moves.
   LGapResolver resolver_;
 
+  Safepoint::Kind expected_safepoint_kind_;
+
+  class PushSafepointRegistersScope BASE_EMBEDDED {
+   public:
+    PushSafepointRegistersScope(LCodeGen* codegen,
+                                Safepoint::Kind kind)
+        : codegen_(codegen) {
+      ASSERT(codegen_->expected_safepoint_kind_ == Safepoint::kSimple);
+      codegen_->expected_safepoint_kind_ = kind;
+
+      switch (codegen_->expected_safepoint_kind_) {
+        case Safepoint::kWithRegisters:
+          codegen_->masm_->PushSafepointRegisters();
+          break;
+        case Safepoint::kWithRegistersAndDoubles:
+          codegen_->masm_->PushSafepointRegistersAndDoubles();
+          break;
+        default:
+          UNREACHABLE();
+      }
+    }
+
+    ~PushSafepointRegistersScope() {
+      Safepoint::Kind kind = codegen_->expected_safepoint_kind_;
+      ASSERT((kind & Safepoint::kWithRegisters) != 0);
+      switch (kind) {
+        case Safepoint::kWithRegisters:
+          codegen_->masm_->PopSafepointRegisters();
+          break;
+        case Safepoint::kWithRegistersAndDoubles:
+          codegen_->masm_->PopSafepointRegistersAndDoubles();
+          break;
+        default:
+          UNREACHABLE();
+      }
+      codegen_->expected_safepoint_kind_ = Safepoint::kSimple;
+    }
+
+   private:
+    LCodeGen* codegen_;
+  };
+
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;
diff --git a/deps/v8/src/deoptimizer.cc b/deps/v8/src/deoptimizer.cc
index af2f42e46..9db812b3e 100644
--- a/deps/v8/src/deoptimizer.cc
+++ b/deps/v8/src/deoptimizer.cc
@@ -196,8 +196,7 @@ Deoptimizer::Deoptimizer(JSFunction* function,
       fp_to_sp_delta_(fp_to_sp_delta),
       output_count_(0),
       output_(NULL),
-      integer32_values_(NULL),
-      double_values_(NULL) {
+      deferred_heap_numbers_(0) {
   if (FLAG_trace_deopt && type != OSR) {
     PrintF("**** DEOPT: ");
     function->PrintName();
@@ -236,8 +235,6 @@ Deoptimizer::Deoptimizer(JSFunction* function,
 
 Deoptimizer::~Deoptimizer() {
   ASSERT(input_ == NULL && output_ == NULL);
-  delete[] integer32_values_;
-  delete[] double_values_;
 }
 
 
@@ -382,13 +379,8 @@ void Deoptimizer::DoComputeOutputFrames() {
   int count = iterator.Next();
   ASSERT(output_ == NULL);
   output_ = new FrameDescription*[count];
-  // Per-frame lists of untagged and unboxed int32 and double values.
-  integer32_values_ = new List<ValueDescriptionInteger32>[count];
-  double_values_ = new List<ValueDescriptionDouble>[count];
   for (int i = 0; i < count; ++i) {
     output_[i] = NULL;
-    integer32_values_[i].Initialize(0);
-    double_values_[i].Initialize(0);
   }
   output_count_ = count;
 
@@ -416,40 +408,22 @@ void Deoptimizer::DoComputeOutputFrames() {
 }
 
 
-void Deoptimizer::InsertHeapNumberValues(int index, JavaScriptFrame* frame) {
-  // We need to adjust the stack index by one for the top-most frame.
-  int extra_slot_count = (index == output_count() - 1) ? 1 : 0;
-  List<ValueDescriptionInteger32>* ints = &integer32_values_[index];
-  for (int i = 0; i < ints->length(); i++) {
-    ValueDescriptionInteger32 value = ints->at(i);
-    double val = static_cast<double>(value.int32_value());
-    InsertHeapNumberValue(frame, value.stack_index(), val, extra_slot_count);
-  }
+void Deoptimizer::MaterializeHeapNumbers() {
+  for (int i = 0; i < deferred_heap_numbers_.length(); i++) {
+    HeapNumberMaterializationDescriptor d = deferred_heap_numbers_[i];
+    Handle<Object> num = Factory::NewNumber(d.value());
+    if (FLAG_trace_deopt) {
+      PrintF("Materializing a new heap number %p [%e] in slot %p\n",
+             reinterpret_cast<void*>(*num),
+             d.value(),
+             d.slot_address());
+    }
 
-  // Iterate over double values and convert them to a heap number.
-  List<ValueDescriptionDouble>* doubles = &double_values_[index];
-  for (int i = 0; i < doubles->length(); ++i) {
-    ValueDescriptionDouble value = doubles->at(i);
-    InsertHeapNumberValue(frame, value.stack_index(), value.double_value(),
-                          extra_slot_count);
+    Memory::Object_at(d.slot_address()) = *num;
   }
 }
 
 
-void Deoptimizer::InsertHeapNumberValue(JavaScriptFrame* frame,
-                                        int stack_index,
-                                        double val,
-                                        int extra_slot_count) {
-  // Add one to the TOS index to take the 'state' pushed before jumping
-  // to the stub that calls Runtime::NotifyDeoptimized into account.
-  int tos_index = stack_index + extra_slot_count;
-  int index = (frame->ComputeExpressionsCount() - 1) - tos_index;
-  if (FLAG_trace_deopt) PrintF("Allocating a new heap number: %e\n", val);
-  Handle<Object> num = Factory::NewNumber(val);
-  frame->SetExpression(index, *num);
-}
-
-
 void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
                                      int frame_index,
                                      unsigned output_offset) {
@@ -492,7 +466,6 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       int input_reg = iterator->Next();
       intptr_t value = input_->GetRegister(input_reg);
       bool is_smi = Smi::IsValid(value);
-      unsigned output_index = output_offset / kPointerSize;
       if (FLAG_trace_deopt) {
         PrintF(
             "    0x%08" V8PRIxPTR ": [top + %d] <- %" V8PRIdPTR " ; %s (%s)\n",
@@ -509,9 +482,8 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       } else {
         // We save the untagged value on the side and store a GC-safe
         // temporary placeholder in the frame.
-        AddInteger32Value(frame_index,
-                          output_index,
-                          static_cast<int32_t>(value));
+        AddDoubleValue(output_[frame_index]->GetTop() + output_offset,
+                       static_cast<double>(static_cast<int32_t>(value)));
         output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
       }
       return;
@@ -520,7 +492,6 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
     case Translation::DOUBLE_REGISTER: {
       int input_reg = iterator->Next();
       double value = input_->GetDoubleRegister(input_reg);
-      unsigned output_index = output_offset / kPointerSize;
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": [top + %d] <- %e ; %s\n",
                output_[frame_index]->GetTop() + output_offset,
@@ -530,7 +501,7 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       }
       // We save the untagged value on the side and store a GC-safe
       // temporary placeholder in the frame.
-      AddDoubleValue(frame_index, output_index, value);
+      AddDoubleValue(output_[frame_index]->GetTop() + output_offset, value);
       output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
       return;
     }
@@ -558,7 +529,6 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
           input_->GetOffsetFromSlotIndex(this, input_slot_index);
       intptr_t value = input_->GetFrameSlot(input_offset);
       bool is_smi = Smi::IsValid(value);
-      unsigned output_index = output_offset / kPointerSize;
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": ",
                output_[frame_index]->GetTop() + output_offset);
@@ -575,9 +545,8 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       } else {
         // We save the untagged value on the side and store a GC-safe
         // temporary placeholder in the frame.
-        AddInteger32Value(frame_index,
-                          output_index,
-                          static_cast<int32_t>(value));
+        AddDoubleValue(output_[frame_index]->GetTop() + output_offset,
+                       static_cast<double>(static_cast<int32_t>(value)));
         output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
       }
       return;
@@ -588,7 +557,6 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       unsigned input_offset =
           input_->GetOffsetFromSlotIndex(this, input_slot_index);
       double value = input_->GetDoubleFrameSlot(input_offset);
-      unsigned output_index = output_offset / kPointerSize;
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": [top + %d] <- %e ; [esp + %d]\n",
                output_[frame_index]->GetTop() + output_offset,
@@ -598,7 +566,7 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
       }
       // We save the untagged value on the side and store a GC-safe
       // temporary placeholder in the frame.
-      AddDoubleValue(frame_index, output_index, value);
+      AddDoubleValue(output_[frame_index]->GetTop() + output_offset, value);
       output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
       return;
     }
@@ -901,19 +869,11 @@ Object* Deoptimizer::ComputeLiteral(int index) const {
 }
 
 
-void Deoptimizer::AddInteger32Value(int frame_index,
-                                    int slot_index,
-                                    int32_t value) {
-  ValueDescriptionInteger32 value_desc(slot_index, value);
-  integer32_values_[frame_index].Add(value_desc);
-}
-
-
-void Deoptimizer::AddDoubleValue(int frame_index,
-                                 int slot_index,
+void Deoptimizer::AddDoubleValue(intptr_t slot_address,
                                  double value) {
-  ValueDescriptionDouble value_desc(slot_index, value);
-  double_values_[frame_index].Add(value_desc);
+  HeapNumberMaterializationDescriptor value_desc(
+      reinterpret_cast<Address>(slot_address), value);
+  deferred_heap_numbers_.Add(value_desc);
 }
 
 
diff --git a/deps/v8/src/deoptimizer.h b/deps/v8/src/deoptimizer.h
index 90495c976..f4cd409be 100644
--- a/deps/v8/src/deoptimizer.h
+++ b/deps/v8/src/deoptimizer.h
@@ -42,38 +42,17 @@ class TranslationIterator;
 class DeoptimizingCodeListNode;
 
 
-class ValueDescription BASE_EMBEDDED {
+class HeapNumberMaterializationDescriptor BASE_EMBEDDED {
  public:
-  explicit ValueDescription(int index) : stack_index_(index) { }
-  int stack_index() const { return stack_index_; }
-
- private:
-  // Offset relative to the top of the stack.
-  int stack_index_;
-};
-
-
-class ValueDescriptionInteger32: public ValueDescription {
- public:
-  ValueDescriptionInteger32(int index, int32_t value)
-      : ValueDescription(index), int32_value_(value) { }
-  int32_t int32_value() const { return int32_value_; }
-
- private:
-  // Raw value.
-  int32_t int32_value_;
-};
+  HeapNumberMaterializationDescriptor(Address slot_address, double val)
+      : slot_address_(slot_address), val_(val) { }
 
-
-class ValueDescriptionDouble: public ValueDescription {
- public:
-  ValueDescriptionDouble(int index, double value)
-      : ValueDescription(index), double_value_(value) { }
-  double double_value() const { return double_value_; }
+  Address slot_address() const { return slot_address_; }
+  double value() const { return val_; }
 
  private:
-  // Raw value.
-  double double_value_;
+  Address slot_address_;
+  double val_;
 };
 
 
@@ -164,7 +143,7 @@ class Deoptimizer : public Malloced {
 
   ~Deoptimizer();
 
-  void InsertHeapNumberValues(int index, JavaScriptFrame* frame);
+  void MaterializeHeapNumbers();
 
   static void ComputeOutputFrames(Deoptimizer* deoptimizer);
 
@@ -253,13 +232,7 @@ class Deoptimizer : public Malloced {
 
   Object* ComputeLiteral(int index) const;
 
-  void InsertHeapNumberValue(JavaScriptFrame* frame,
-                             int stack_index,
-                             double val,
-                             int extra_slot_count);
-
-  void AddInteger32Value(int frame_index, int slot_index, int32_t value);
-  void AddDoubleValue(int frame_index, int slot_index, double value);
+  void AddDoubleValue(intptr_t slot_address, double value);
 
   static LargeObjectChunk* CreateCode(BailoutType type);
   static void GenerateDeoptimizationEntries(
@@ -295,8 +268,7 @@ class Deoptimizer : public Malloced {
   // Array of output frame descriptions.
   FrameDescription** output_;
 
-  List<ValueDescriptionInteger32>* integer32_values_;
-  List<ValueDescriptionDouble>* double_values_;
+  List<HeapNumberMaterializationDescriptor> deferred_heap_numbers_;
 
   static int table_entry_size_;
 
diff --git a/deps/v8/src/frames-inl.h b/deps/v8/src/frames-inl.h
index 78bb646c7..9430cad0d 100644
--- a/deps/v8/src/frames-inl.h
+++ b/deps/v8/src/frames-inl.h
@@ -136,15 +136,26 @@ inline bool StandardFrame::IsConstructFrame(Address fp) {
 }
 
 
+Address JavaScriptFrame::GetParameterSlot(int index) const {
+  int param_count = ComputeParametersCount();
+  ASSERT(-1 <= index && index < param_count);
+  int parameter_offset = (param_count - index - 1) * kPointerSize;
+  return caller_sp() + parameter_offset;
+}
+
+
+Object* JavaScriptFrame::GetParameter(int index) const {
+  return Memory::Object_at(GetParameterSlot(index));
+}
+
+
 inline Object* JavaScriptFrame::receiver() const {
-  const int offset = JavaScriptFrameConstants::kReceiverOffset;
-  return Memory::Object_at(caller_sp() + offset);
+  return GetParameter(-1);
 }
 
 
 inline void JavaScriptFrame::set_receiver(Object* value) {
-  const int offset = JavaScriptFrameConstants::kReceiverOffset;
-  Memory::Object_at(caller_sp() + offset) = value;
+  Memory::Object_at(GetParameterSlot(-1)) = value;
 }
 
 
diff --git a/deps/v8/src/frames.cc b/deps/v8/src/frames.cc
index 24ea8dde2..e94fdd84e 100644
--- a/deps/v8/src/frames.cc
+++ b/deps/v8/src/frames.cc
@@ -540,9 +540,7 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
       pc(), &safepoint_entry, &stack_slots);
   unsigned slot_space = stack_slots * kPointerSize;
 
-  // Visit the outgoing parameters. This is usually dealt with by the
-  // callee, but while GC'ing we artificially lower the number of
-  // arguments to zero and let the caller deal with it.
+  // Visit the outgoing parameters.
   Object** parameters_base = &Memory::Object_at(sp());
   Object** parameters_limit = &Memory::Object_at(
       fp() + JavaScriptFrameConstants::kFunctionOffset - slot_space);
@@ -596,21 +594,6 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
 
   // Visit the return address in the callee and incoming arguments.
   IteratePc(v, pc_address(), code);
-  IterateArguments(v);
-}
-
-
-Object* JavaScriptFrame::GetParameter(int index) const {
-  ASSERT(index >= 0 && index < ComputeParametersCount());
-  const int offset = JavaScriptFrameConstants::kParam0Offset;
-  return Memory::Object_at(caller_sp() + offset - (index * kPointerSize));
-}
-
-
-int JavaScriptFrame::ComputeParametersCount() const {
-  Address base  = caller_sp() + JavaScriptFrameConstants::kReceiverOffset;
-  Address limit = fp() + JavaScriptFrameConstants::kSavedRegistersOffset;
-  return static_cast<int>((base - limit) / kPointerSize);
 }
 
 
@@ -630,32 +613,17 @@ Code* JavaScriptFrame::unchecked_code() const {
 }
 
 
-int JavaScriptFrame::GetProvidedParametersCount() const {
-  return ComputeParametersCount();
+int JavaScriptFrame::GetNumberOfIncomingArguments() const {
+  ASSERT(!SafeStackFrameIterator::is_active() &&
+         Heap::gc_state() == Heap::NOT_IN_GC);
+
+  JSFunction* function = JSFunction::cast(this->function());
+  return function->shared()->formal_parameter_count();
 }
 
 
 Address JavaScriptFrame::GetCallerStackPointer() const {
-  int arguments;
-  if (Heap::gc_state() != Heap::NOT_IN_GC ||
-      SafeStackFrameIterator::is_active()) {
-    // If the we are currently iterating the safe stack the
-    // arguments for frames are traversed as if they were
-    // expression stack elements of the calling frame. The reason for
-    // this rather strange decision is that we cannot access the
-    // function during mark-compact GCs when objects may have been marked.
-    // In fact accessing heap objects (like function->shared() below)
-    // at all during GC is problematic.
-    arguments = 0;
-  } else {
-    // Compute the number of arguments by getting the number of formal
-    // parameters of the function. We must remember to take the
-    // receiver into account (+1).
-    JSFunction* function = JSFunction::cast(this->function());
-    arguments = function->shared()->formal_parameter_count() + 1;
-  }
-  const int offset = StandardFrameConstants::kCallerSPOffset;
-  return fp() + offset + (arguments * kPointerSize);
+  return fp() + StandardFrameConstants::kCallerSPOffset;
 }
 
 
@@ -833,9 +801,7 @@ void OptimizedFrame::GetFunctions(List<JSFunction*>* functions) {
 
 
 Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
-  const int arguments = Smi::cast(GetExpression(0))->value();
-  const int offset = StandardFrameConstants::kCallerSPOffset;
-  return fp() + offset + (arguments + 1) * kPointerSize;
+  return fp() + StandardFrameConstants::kCallerSPOffset;
 }
 
 
@@ -1074,17 +1040,6 @@ void StandardFrame::IterateExpressions(ObjectVisitor* v) const {
 void JavaScriptFrame::Iterate(ObjectVisitor* v) const {
   IterateExpressions(v);
   IteratePc(v, pc_address(), code());
-  IterateArguments(v);
-}
-
-
-void JavaScriptFrame::IterateArguments(ObjectVisitor* v) const {
-  // Traverse callee-saved registers, receiver, and parameters.
-  const int kBaseOffset = JavaScriptFrameConstants::kSavedRegistersOffset;
-  const int kLimitOffset = JavaScriptFrameConstants::kReceiverOffset;
-  Object** base = &Memory::Object_at(fp() + kBaseOffset);
-  Object** limit = &Memory::Object_at(caller_sp() + kLimitOffset) + 1;
-  v->VisitPointers(base, limit);
 }
 
 
diff --git a/deps/v8/src/frames.h b/deps/v8/src/frames.h
index 537870906..03e5e671b 100644
--- a/deps/v8/src/frames.h
+++ b/deps/v8/src/frames.h
@@ -449,14 +449,11 @@ class JavaScriptFrame: public StandardFrame {
   inline void set_receiver(Object* value);
 
   // Access the parameters.
-  Object* GetParameter(int index) const;
-  int ComputeParametersCount() const;
-
-  // Temporary way of getting access to the number of parameters
-  // passed on the stack by the caller. Once argument adaptor frames
-  // has been introduced on ARM, this number will always match the
-  // computed parameters count.
-  int GetProvidedParametersCount() const;
+  inline Address GetParameterSlot(int index) const;
+  inline Object* GetParameter(int index) const;
+  inline int ComputeParametersCount() const {
+    return GetNumberOfIncomingArguments();
+  }
 
   // Check if this frame is a constructor frame invoked through 'new'.
   bool IsConstructor() const;
@@ -494,6 +491,8 @@ class JavaScriptFrame: public StandardFrame {
 
   virtual Address GetCallerStackPointer() const;
 
+  virtual int GetNumberOfIncomingArguments() const;
+
   // Garbage collection support. Iterates over incoming arguments,
   // receiver, and any callee-saved registers.
   void IterateArguments(ObjectVisitor* v) const;
@@ -554,6 +553,10 @@ class ArgumentsAdaptorFrame: public JavaScriptFrame {
   explicit ArgumentsAdaptorFrame(StackFrameIterator* iterator)
       : JavaScriptFrame(iterator) { }
 
+  virtual int GetNumberOfIncomingArguments() const {
+    return Smi::cast(GetExpression(0))->value();
+  }
+
   virtual Address GetCallerStackPointer() const;
 
  private:
diff --git a/deps/v8/src/ia32/lithium-codegen-ia32.cc b/deps/v8/src/ia32/lithium-codegen-ia32.cc
index 2b7712c43..a1be11d83 100644
--- a/deps/v8/src/ia32/lithium-codegen-ia32.cc
+++ b/deps/v8/src/ia32/lithium-codegen-ia32.cc
@@ -418,20 +418,21 @@ void LCodeGen::AddToTranslation(Translation* translation,
 }
 
 
-void LCodeGen::CallCode(Handle<Code> code,
-                        RelocInfo::Mode mode,
-                        LInstruction* instr,
-                        bool adjusted) {
+void LCodeGen::CallCodeGeneric(Handle<Code> code,
+                               RelocInfo::Mode mode,
+                               LInstruction* instr,
+                               ContextMode context_mode,
+                               SafepointMode safepoint_mode) {
   ASSERT(instr != NULL);
   LPointerMap* pointers = instr->pointer_map();
   RecordPosition(pointers->position());
 
-  if (!adjusted) {
+  if (context_mode == RESTORE_CONTEXT) {
     __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   }
   __ call(code, mode);
 
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, safepoint_mode);
 
   // Signal that we don't inline smi code before these stubs in the
   // optimizing code generator.
@@ -442,25 +443,44 @@ void LCodeGen::CallCode(Handle<Code> code,
 }
 
 
+void LCodeGen::CallCode(Handle<Code> code,
+                        RelocInfo::Mode mode,
+                        LInstruction* instr,
+                        ContextMode context_mode) {
+  CallCodeGeneric(code, mode, instr, context_mode, RECORD_SIMPLE_SAFEPOINT);
+}
+
+
 void LCodeGen::CallRuntime(Runtime::Function* fun,
                            int argc,
                            LInstruction* instr,
-                           bool adjusted) {
+                           ContextMode context_mode) {
   ASSERT(instr != NULL);
   ASSERT(instr->HasPointerMap());
   LPointerMap* pointers = instr->pointer_map();
   RecordPosition(pointers->position());
 
-  if (!adjusted) {
+  if (context_mode == RESTORE_CONTEXT) {
     __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   }
   __ CallRuntime(fun, argc);
 
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT);
+}
+
+
+void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id,
+                                       int argc,
+                                       LInstruction* instr) {
+  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+  __ CallRuntimeSaveDoubles(id);
+  RecordSafepointWithRegisters(
+      instr->pointer_map(), argc, Safepoint::kNoDeoptimizationIndex);
 }
 
 
-void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
+void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr,
+                                          SafepointMode safepoint_mode) {
   // Create the environment to bailout to. If the call has side effects
   // execution has to continue after the call otherwise execution can continue
   // from a previous bailout point repeating the call.
@@ -472,8 +492,16 @@ void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
   }
 
   RegisterEnvironmentForDeoptimization(deoptimization_environment);
-  RecordSafepoint(instr->pointer_map(),
-                  deoptimization_environment->deoptimization_index());
+  if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) {
+    RecordSafepoint(instr->pointer_map(),
+                    deoptimization_environment->deoptimization_index());
+  } else {
+    ASSERT(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);
+    RecordSafepointWithRegisters(
+        instr->pointer_map(),
+        0,
+        deoptimization_environment->deoptimization_index());
+  }
 }
 
 
@@ -622,6 +650,7 @@ void LCodeGen::RecordSafepoint(
     Safepoint::Kind kind,
     int arguments,
     int deoptimization_index) {
+  ASSERT(kind == expected_safepoint_kind_);
   const ZoneList<LOperand*>* operands = pointers->operands();
   Safepoint safepoint = safepoints_.DefineSafepoint(masm(),
       kind, arguments, deoptimization_index);
@@ -707,48 +736,48 @@ void LCodeGen::DoCallStub(LCallStub* instr) {
   switch (instr->hydrogen()->major_key()) {
     case CodeStub::RegExpConstructResult: {
       RegExpConstructResultStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::RegExpExec: {
       RegExpExecStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::SubString: {
       SubStringStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::StringCharAt: {
       StringCharAtStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::MathPow: {
       MathPowStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::NumberToString: {
       NumberToStringStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::StringAdd: {
       StringAddStub stub(NO_STRING_ADD_FLAGS);
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::StringCompare: {
       StringCompareStub stub;
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     case CodeStub::TranscendentalCache: {
       TranscendentalCacheStub stub(instr->transcendental_type(),
                                    TranscendentalCacheStub::TAGGED);
-      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+      CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
       break;
     }
     default:
@@ -1098,7 +1127,7 @@ void LCodeGen::DoBitNotI(LBitNotI* instr) {
 
 void LCodeGen::DoThrow(LThrow* instr) {
   __ push(ToOperand(instr->InputAt(0)));
-  CallRuntime(Runtime::kThrow, 1, instr, false);
+  CallRuntime(Runtime::kThrow, 1, instr, RESTORE_CONTEXT);
 
   if (FLAG_debug_code) {
     Comment("Unreachable code.");
@@ -1170,7 +1199,7 @@ void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
   ASSERT(ToRegister(instr->result()).is(eax));
 
   TypeRecordingBinaryOpStub stub(instr->op(), NO_OVERWRITE);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 }
 
 
@@ -1282,12 +1311,8 @@ void LCodeGen::EmitGoto(int block, LDeferredCode* deferred_stack_check) {
 
 
 void LCodeGen::DoDeferredStackCheck(LGoto* instr) {
-  __ pushad();
-  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kStackGuard);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
-  __ popad();
+  PushSafepointRegistersScope scope(this);
+  CallRuntimeFromDeferred(Runtime::kStackGuard, 0, instr);
 }
 
 void LCodeGen::DoGoto(LGoto* instr) {
@@ -1776,7 +1801,7 @@ void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
   // Object and function are in fixed registers defined by the stub.
   ASSERT(ToRegister(instr->context()).is(esi));
   InstanceofStub stub(InstanceofStub::kArgsInRegisters);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 
   NearLabel true_value, done;
   __ test(eax, Operand(eax));
@@ -1795,7 +1820,7 @@ void LCodeGen::DoInstanceOfAndBranch(LInstanceOfAndBranch* instr) {
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   InstanceofStub stub(InstanceofStub::kArgsInRegisters);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
   __ test(eax, Operand(eax));
   EmitBranch(true_block, false_block, zero);
 }
@@ -1867,7 +1892,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
 
 void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
                                                 Label* map_check) {
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
 
   InstanceofStub::Flags flags = InstanceofStub::kNoFlags;
   flags = static_cast<InstanceofStub::Flags>(
@@ -1878,11 +1903,12 @@ void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
       flags | InstanceofStub::kReturnTrueFalseObject);
   InstanceofStub stub(flags);
 
-  // Get the temp register reserved by the instruction. This needs to be edi as
-  // its slot of the pushing of safepoint registers is used to communicate the
-  // offset to the location of the map check.
+  // Get the temp register reserved by the instruction. This needs to be a
+  // register which is pushed last by PushSafepointRegisters as top of the
+  // stack is used to pass the offset to the location of the map check to
+  // the stub.
   Register temp = ToRegister(instr->TempAt(0));
-  ASSERT(temp.is(edi));
+  ASSERT(MacroAssembler::SafepointRegisterStackIndex(temp) == 0);
   __ mov(InstanceofStub::right(), Immediate(instr->function()));
   static const int kAdditionalDelta = 16;
   int delta = masm_->SizeOfCodeGeneratedSince(map_check) + kAdditionalDelta;
@@ -1890,10 +1916,13 @@ void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
   __ bind(&before_push_delta);
   __ mov(temp, Immediate(delta));
   __ StoreToSafepointRegisterSlot(temp, temp);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCodeGeneric(stub.GetCode(),
+                  RelocInfo::CODE_TARGET,
+                  instr,
+                  RESTORE_CONTEXT,
+                  RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);
   // Put the result value into the eax slot and restore all registers.
   __ StoreToSafepointRegisterSlot(eax, eax);
-  __ PopSafepointRegisters();
 }
 
 
@@ -1921,7 +1950,7 @@ void LCodeGen::DoCmpT(LCmpT* instr) {
   Token::Value op = instr->op();
 
   Handle<Code> ic = CompareIC::GetUninitialized(op);
-  CallCode(ic, RelocInfo::CODE_TARGET, instr, false);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 
   Condition condition = ComputeCompareCondition(op);
   if (op == Token::GT || op == Token::LTE) {
@@ -1944,7 +1973,7 @@ void LCodeGen::DoCmpTAndBranch(LCmpTAndBranch* instr) {
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   Handle<Code> ic = CompareIC::GetUninitialized(op);
-  CallCode(ic, RelocInfo::CODE_TARGET, instr, false);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 
   // The compare stub expects compare condition and the input operands
   // reversed for GT and LTE.
@@ -2039,7 +2068,7 @@ void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
 
   __ mov(ecx, instr->name());
   Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2163,7 +2192,7 @@ void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->key()).is(eax));
 
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2351,7 +2380,7 @@ void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
   }
 
   // Setup deoptimization.
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT);
 }
 
 
@@ -2373,7 +2402,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   Register tmp2 = tmp.is(ecx) ? edx : input_reg.is(ecx) ? edx : ecx;
 
   // Preserve the value of all registers.
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
 
   Label negative;
   __ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset));
@@ -2394,10 +2423,8 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   // Slow case: Call the runtime system to do the number allocation.
   __ bind(&slow);
 
-  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
+
   // Set the pointer to the new heap number in tmp.
   if (!tmp.is(eax)) __ mov(tmp, eax);
 
@@ -2413,7 +2440,6 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   __ StoreToSafepointRegisterSlot(input_reg, tmp);
 
   __ bind(&done);
-  __ PopSafepointRegisters();
 }
 
 
@@ -2601,7 +2627,7 @@ void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
   TranscendentalCacheStub stub(TranscendentalCache::LOG,
                                TranscendentalCacheStub::UNTAGGED);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 }
 
 
@@ -2609,7 +2635,7 @@ void LCodeGen::DoMathCos(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
   TranscendentalCacheStub stub(TranscendentalCache::COS,
                                TranscendentalCacheStub::UNTAGGED);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 }
 
 
@@ -2617,7 +2643,7 @@ void LCodeGen::DoMathSin(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
   TranscendentalCacheStub stub(TranscendentalCache::SIN,
                                TranscendentalCacheStub::UNTAGGED);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
 }
 
 
@@ -2661,7 +2687,7 @@ void LCodeGen::DoCallKeyed(LCallKeyed* instr) {
 
   int arity = instr->arity();
   Handle<Code> ic = StubCache::ComputeKeyedCallInitialize(arity, NOT_IN_LOOP);
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2672,7 +2698,7 @@ void LCodeGen::DoCallNamed(LCallNamed* instr) {
   int arity = instr->arity();
   Handle<Code> ic = StubCache::ComputeCallInitialize(arity, NOT_IN_LOOP);
   __ mov(ecx, instr->name());
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2682,7 +2708,7 @@ void LCodeGen::DoCallFunction(LCallFunction* instr) {
 
   int arity = instr->arity();
   CallFunctionStub stub(arity, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE);
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
   __ Drop(1);
 }
 
@@ -2694,7 +2720,7 @@ void LCodeGen::DoCallGlobal(LCallGlobal* instr) {
   int arity = instr->arity();
   Handle<Code> ic = StubCache::ComputeCallInitialize(arity, NOT_IN_LOOP);
   __ mov(ecx, instr->name());
-  CallCode(ic, RelocInfo::CODE_TARGET_CONTEXT, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET_CONTEXT, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2712,12 +2738,12 @@ void LCodeGen::DoCallNew(LCallNew* instr) {
 
   Handle<Code> builtin(Builtins::builtin(Builtins::JSConstructCall));
   __ Set(eax, Immediate(instr->arity()));
-  CallCode(builtin, RelocInfo::CONSTRUCT_CALL, instr);
+  CallCode(builtin, RelocInfo::CONSTRUCT_CALL, instr, CONTEXT_ADJUSTED);
 }
 
 
 void LCodeGen::DoCallRuntime(LCallRuntime* instr) {
-  CallRuntime(instr->function(), instr->arity(), instr, false);
+  CallRuntime(instr->function(), instr->arity(), instr, RESTORE_CONTEXT);
 }
 
 
@@ -2760,7 +2786,7 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
   Handle<Code> ic(Builtins::builtin(
       info_->is_strict() ? Builtins::StoreIC_Initialize_Strict
                          : Builtins::StoreIC_Initialize));
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2830,7 +2856,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   Handle<Code> ic(Builtins::builtin(
       info_->is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict
                          : Builtins::KeyedStoreIC_Initialize));
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, CONTEXT_ADJUSTED);
 }
 
 
@@ -2948,7 +2974,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
   // contained in the register pointer map.
   __ Set(result, Immediate(0));
 
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
   __ push(string);
   // Push the index as a smi. This is safe because of the checks in
   // DoStringCharCodeAt above.
@@ -2961,16 +2987,12 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ SmiTag(index);
     __ push(index);
   }
-  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kStringCharCodeAt);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 2, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
   if (FLAG_debug_code) {
     __ AbortIfNotSmi(eax);
   }
   __ SmiUntag(eax);
   __ StoreToSafepointRegisterSlot(result, eax);
-  __ PopSafepointRegisters();
 }
 
 
@@ -3017,7 +3039,7 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   Register tmp = reg.is(eax) ? ecx : eax;
 
   // Preserve the value of all registers.
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
 
   // There was overflow, so bits 30 and 31 of the original integer
   // disagree. Try to allocate a heap number in new space and store
@@ -3039,10 +3061,7 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   // integer value.
   __ StoreToSafepointRegisterSlot(reg, Immediate(0));
 
-  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   if (!reg.is(eax)) __ mov(reg, eax);
 
   // Done. Put the value in xmm0 into the value of the allocated heap
@@ -3050,7 +3069,6 @@ void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) {
   __ bind(&done);
   __ movdbl(FieldOperand(reg, HeapNumber::kValueOffset), xmm0);
   __ StoreToSafepointRegisterSlot(reg, reg);
-  __ PopSafepointRegisters();
 }
 
 
@@ -3086,13 +3104,9 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   Register reg = ToRegister(instr->result());
   __ Set(reg, Immediate(0));
 
-  __ PushSafepointRegisters();
-  __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  PushSafepointRegistersScope scope(this);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   __ StoreToSafepointRegisterSlot(reg, eax);
-  __ PopSafepointRegisters();
 }
 
 
@@ -3503,16 +3517,16 @@ void LCodeGen::DoArrayLiteral(LArrayLiteral* instr) {
     FastCloneShallowArrayStub::Mode mode =
         FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS;
     FastCloneShallowArrayStub stub(mode, length);
-    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
   } else if (instr->hydrogen()->depth() > 1) {
-    CallRuntime(Runtime::kCreateArrayLiteral, 3, instr, false);
+    CallRuntime(Runtime::kCreateArrayLiteral, 3, instr, RESTORE_CONTEXT);
   } else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) {
-    CallRuntime(Runtime::kCreateArrayLiteralShallow, 3, instr, false);
+    CallRuntime(Runtime::kCreateArrayLiteralShallow, 3, instr, RESTORE_CONTEXT);
   } else {
     FastCloneShallowArrayStub::Mode mode =
         FastCloneShallowArrayStub::CLONE_ELEMENTS;
     FastCloneShallowArrayStub stub(mode, length);
-    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
   }
 }
 
@@ -3528,9 +3542,12 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
 
   // Pick the right runtime function to call.
   if (instr->hydrogen()->depth() > 1) {
-    CallRuntime(Runtime::kCreateObjectLiteral, 4, instr);
+    CallRuntime(Runtime::kCreateObjectLiteral, 4, instr, CONTEXT_ADJUSTED);
   } else {
-    CallRuntime(Runtime::kCreateObjectLiteralShallow, 4, instr);
+    CallRuntime(Runtime::kCreateObjectLiteralShallow,
+                4,
+                instr,
+                CONTEXT_ADJUSTED);
   }
 }
 
@@ -3556,7 +3573,7 @@ void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
   __ push(Immediate(Smi::FromInt(instr->hydrogen()->literal_index())));
   __ push(Immediate(instr->hydrogen()->pattern()));
   __ push(Immediate(instr->hydrogen()->flags()));
-  CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr, false);
+  CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr, RESTORE_CONTEXT);
   __ mov(ebx, eax);
 
   __ bind(&materialized);
@@ -3568,7 +3585,7 @@ void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
   __ bind(&runtime_allocate);
   __ push(ebx);
   __ push(Immediate(Smi::FromInt(size)));
-  CallRuntime(Runtime::kAllocateInNewSpace, 1, instr, false);
+  CallRuntime(Runtime::kAllocateInNewSpace, 1, instr, RESTORE_CONTEXT);
   __ pop(ebx);
 
   __ bind(&allocated);
@@ -3595,14 +3612,14 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
   if (shared_info->num_literals() == 0 && !pretenure) {
     FastNewClosureStub stub;
     __ push(Immediate(shared_info));
-    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
   } else {
     __ push(Operand(ebp, StandardFrameConstants::kContextOffset));
     __ push(Immediate(shared_info));
     __ push(Immediate(pretenure
                       ? Factory::true_value()
                       : Factory::false_value()));
-    CallRuntime(Runtime::kNewClosure, 3, instr, false);
+    CallRuntime(Runtime::kNewClosure, 3, instr, RESTORE_CONTEXT);
   }
 }
 
@@ -3614,7 +3631,7 @@ void LCodeGen::DoTypeof(LTypeof* instr) {
   } else {
     __ push(ToOperand(input));
   }
-  CallRuntime(Runtime::kTypeof, 1, instr, false);
+  CallRuntime(Runtime::kTypeof, 1, instr, RESTORE_CONTEXT);
 }
 
 
@@ -3825,7 +3842,7 @@ void LCodeGen::DoStackCheck(LStackCheck* instr) {
   __ j(above_equal, &done);
 
   StackCheckStub stub;
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, false);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr, RESTORE_CONTEXT);
   __ bind(&done);
 }
 
diff --git a/deps/v8/src/ia32/lithium-codegen-ia32.h b/deps/v8/src/ia32/lithium-codegen-ia32.h
index 5ba4bc435..681ea77e5 100644
--- a/deps/v8/src/ia32/lithium-codegen-ia32.h
+++ b/deps/v8/src/ia32/lithium-codegen-ia32.h
@@ -61,7 +61,8 @@ class LCodeGen BASE_EMBEDDED {
         deferred_(8),
         osr_pc_offset_(-1),
         deoptimization_reloc_size(),
-        resolver_(this) {
+        resolver_(this),
+        expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
@@ -159,16 +160,44 @@ class LCodeGen BASE_EMBEDDED {
   bool GenerateRelocPadding();
   bool GenerateSafepointTable();
 
-  void CallCode(Handle<Code> code, RelocInfo::Mode mode, LInstruction* instr,
-                bool adjusted = true);
-  void CallRuntime(Runtime::Function* fun, int argc, LInstruction* instr,
-                   bool adjusted = true);
-  void CallRuntime(Runtime::FunctionId id, int argc, LInstruction* instr,
-                   bool adjusted = true) {
+  enum ContextMode {
+    RESTORE_CONTEXT,
+    CONTEXT_ADJUSTED
+  };
+
+  enum SafepointMode {
+    RECORD_SIMPLE_SAFEPOINT,
+    RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
+  };
+
+  void CallCode(Handle<Code> code,
+                RelocInfo::Mode mode,
+                LInstruction* instr,
+                ContextMode context_mode);
+
+  void CallCodeGeneric(Handle<Code> code,
+                       RelocInfo::Mode mode,
+                       LInstruction* instr,
+                       ContextMode context_mode,
+                       SafepointMode safepoint_mode);
+
+  void CallRuntime(Runtime::Function* fun,
+                   int argc,
+                   LInstruction* instr,
+                   ContextMode context_mode);
+
+  void CallRuntime(Runtime::FunctionId id,
+                   int argc,
+                   LInstruction* instr,
+                   ContextMode context_mode) {
     Runtime::Function* function = Runtime::FunctionForId(id);
-    CallRuntime(function, argc, instr, adjusted);
+    CallRuntime(function, argc, instr, context_mode);
   }
 
+  void CallRuntimeFromDeferred(Runtime::FunctionId id,
+                               int argc,
+                               LInstruction* instr);
+
   // Generate a direct call to a known function.  Expects the function
   // to be in edi.
   void CallKnownFunction(Handle<JSFunction> function,
@@ -177,7 +206,9 @@ class LCodeGen BASE_EMBEDDED {
 
   void LoadHeapObject(Register result, Handle<HeapObject> object);
 
-  void RegisterLazyDeoptimization(LInstruction* instr);
+  void RegisterLazyDeoptimization(LInstruction* instr,
+                                  SafepointMode safepoint_mode);
+
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
   void DeoptimizeIf(Condition cc, LEnvironment* environment);
 
@@ -272,6 +303,27 @@ class LCodeGen BASE_EMBEDDED {
   // Compiler from a set of parallel moves to a sequential list of moves.
   LGapResolver resolver_;
 
+  Safepoint::Kind expected_safepoint_kind_;
+
+  class PushSafepointRegistersScope BASE_EMBEDDED {
+   public:
+    explicit PushSafepointRegistersScope(LCodeGen* codegen)
+        : codegen_(codegen) {
+      ASSERT(codegen_->expected_safepoint_kind_ == Safepoint::kSimple);
+      codegen_->masm_->PushSafepointRegisters();
+      codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters;
+    }
+
+    ~PushSafepointRegistersScope() {
+      ASSERT(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters);
+      codegen_->masm_->PopSafepointRegisters();
+      codegen_->expected_safepoint_kind_ = Safepoint::kSimple;
+    }
+
+   private:
+    LCodeGen* codegen_;
+  };
+
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.h b/deps/v8/src/ia32/macro-assembler-ia32.h
index 62bb0f363..580aad1a5 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/macro-assembler-ia32.h
@@ -635,6 +635,10 @@ class MacroAssembler: public Assembler {
                                            Register scratch2,
                                            Label* on_not_flat_ascii_strings);
 
+  static int SafepointRegisterStackIndex(Register reg) {
+    return SafepointRegisterStackIndex(reg.code());
+  }
+
  private:
   bool generating_stub_;
   bool allow_stub_calls_;
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc
index 0c15f60f3..4fe0e82b3 100644
--- a/deps/v8/src/runtime.cc
+++ b/deps/v8/src/runtime.cc
@@ -4332,7 +4332,7 @@ static MaybeObject* Runtime_GetArgumentsProperty(Arguments args) {
   JavaScriptFrame* frame = it.frame();
 
   // Get the actual number of provided arguments.
-  const uint32_t n = frame->GetProvidedParametersCount();
+  const uint32_t n = frame->ComputeParametersCount();
 
   // Try to convert the key to an index. If successful and within
   // index return the the argument from the frame.
@@ -6887,7 +6887,7 @@ static MaybeObject* Runtime_NewObjectFromBound(Arguments args) {
   ASSERT(!frame->is_optimized());
   it.AdvanceToArgumentsFrame();
   frame = it.frame();
-  int argc = frame->GetProvidedParametersCount();
+  int argc = frame->ComputeParametersCount();
 
   // Prepend bound arguments to caller's arguments.
   int total_argc = bound_argc + argc;
@@ -7092,14 +7092,13 @@ static MaybeObject* Runtime_NotifyDeoptimized(Arguments args) {
   ASSERT(Heap::IsAllocationAllowed());
   int frames = deoptimizer->output_count();
 
+  deoptimizer->MaterializeHeapNumbers();
+  delete deoptimizer;
+
   JavaScriptFrameIterator it;
   JavaScriptFrame* frame = NULL;
-  for (int i = 0; i < frames; i++) {
-    if (i != 0) it.Advance();
-    frame = it.frame();
-    deoptimizer->InsertHeapNumberValues(frames - i - 1, frame);
-  }
-  delete deoptimizer;
+  for (int i = 0; i < frames - 1; i++) it.Advance();
+  frame = it.frame();
 
   RUNTIME_ASSERT(frame->function()->IsJSFunction());
   Handle<JSFunction> function(JSFunction::cast(frame->function()));
@@ -7720,7 +7719,7 @@ static void PrintTransition(Object* result) {
     // supplied parameters, not all parameters required)
     PrintF("(this=");
     PrintObject(frame->receiver());
-    const int length = frame->GetProvidedParametersCount();
+    const int length = frame->ComputeParametersCount();
     for (int i = 0; i < length; i++) {
       PrintF(", ");
       PrintObject(frame->GetParameter(i));
@@ -9223,8 +9222,8 @@ static MaybeObject* Runtime_GetFrameDetails(Arguments args) {
   // Find the number of arguments to fill. At least fill the number of
   // parameters for the function and fill more if more parameters are provided.
   int argument_count = info.number_of_parameters();
-  if (argument_count < it.frame()->GetProvidedParametersCount()) {
-    argument_count = it.frame()->GetProvidedParametersCount();
+  if (argument_count < it.frame()->ComputeParametersCount()) {
+    argument_count = it.frame()->ComputeParametersCount();
   }
 
   // Calculate the size of the result.
@@ -9281,7 +9280,7 @@ static MaybeObject* Runtime_GetFrameDetails(Arguments args) {
     // TODO(3141533): We should be able to get the actual parameter
     // value for optimized frames.
     if (!is_optimized_frame &&
-        (i < it.frame()->GetProvidedParametersCount())) {
+        (i < it.frame()->ComputeParametersCount())) {
       details->set(details_index++, it.frame()->GetParameter(i));
     } else {
       details->set(details_index++, Heap::undefined_value());
@@ -10161,7 +10160,7 @@ static Handle<Object> GetArgumentsObject(JavaScriptFrame* frame,
     }
   }
 
-  const int length = frame->GetProvidedParametersCount();
+  const int length = frame->ComputeParametersCount();
   Handle<JSObject> arguments = Factory::NewArgumentsObject(function, length);
   Handle<FixedArray> array = Factory::NewFixedArray(length);
 
diff --git a/deps/v8/src/scopes.cc b/deps/v8/src/scopes.cc
index a89bf9638..6a720f5f0 100644
--- a/deps/v8/src/scopes.cc
+++ b/deps/v8/src/scopes.cc
@@ -118,7 +118,7 @@ Scope::Scope(Type type)
     params_(0),
     unresolved_(0),
     decls_(0) {
-  SetDefaults(type, NULL, NULL);
+  SetDefaults(type, NULL, Handle<SerializedScopeInfo>::null());
   ASSERT(!resolved());
 }
 
@@ -130,7 +130,7 @@ Scope::Scope(Scope* outer_scope, Type type)
     params_(4),
     unresolved_(16),
     decls_(4) {
-  SetDefaults(type, outer_scope, NULL);
+  SetDefaults(type, outer_scope, Handle<SerializedScopeInfo>::null());
   // At some point we might want to provide outer scopes to
   // eval scopes (by walking the stack and reading the scope info).
   // In that case, the ASSERT below needs to be adjusted.
@@ -140,14 +140,14 @@ Scope::Scope(Scope* outer_scope, Type type)
 }
 
 
-Scope::Scope(Scope* inner_scope, SerializedScopeInfo* scope_info)
+Scope::Scope(Scope* inner_scope, Handle<SerializedScopeInfo> scope_info)
   : inner_scopes_(4),
     variables_(),
     temps_(4),
     params_(4),
     unresolved_(16),
     decls_(4) {
-  ASSERT(scope_info != NULL);
+  ASSERT(!scope_info.is_null());
   SetDefaults(FUNCTION_SCOPE, NULL, scope_info);
   ASSERT(resolved());
   if (scope_info->HasHeapAllocatedLocals()) {
@@ -176,6 +176,31 @@ Scope::Scope(Scope* inner_scope, SerializedScopeInfo* scope_info)
 }
 
 
+void Scope::SetDefaults(Type type,
+                        Scope* outer_scope,
+                        Handle<SerializedScopeInfo> scope_info) {
+  outer_scope_ = outer_scope;
+  type_ = type;
+  scope_name_ = Factory::empty_symbol();
+  dynamics_ = NULL;
+  receiver_ = NULL;
+  function_ = NULL;
+  arguments_ = NULL;
+  arguments_shadow_ = NULL;
+  illegal_redecl_ = NULL;
+  scope_inside_with_ = false;
+  scope_contains_with_ = false;
+  scope_calls_eval_ = false;
+  outer_scope_calls_eval_ = false;
+  inner_scope_calls_eval_ = false;
+  outer_scope_is_eval_scope_ = false;
+  force_eager_compilation_ = false;
+  num_stack_slots_ = 0;
+  num_heap_slots_ = 0;
+  scope_info_ = scope_info;
+}
+
+
 Scope* Scope::DeserializeScopeChain(CompilationInfo* info,
                                     Scope* global_scope) {
   ASSERT(!info->closure().is_null());
@@ -188,8 +213,8 @@ Scope* Scope::DeserializeScopeChain(CompilationInfo* info,
     JSFunction* current = *info->closure();
     do {
       current = current->context()->closure();
-      SerializedScopeInfo* scope_info = current->shared()->scope_info();
-      if (scope_info != SerializedScopeInfo::Empty()) {
+      Handle<SerializedScopeInfo> scope_info(current->shared()->scope_info());
+      if (*scope_info != SerializedScopeInfo::Empty()) {
         scope = new Scope(scope, scope_info);
         if (innermost_scope == NULL) innermost_scope = scope;
       } else {
diff --git a/deps/v8/src/scopes.h b/deps/v8/src/scopes.h
index 140ff1994..4a48a4c45 100644
--- a/deps/v8/src/scopes.h
+++ b/deps/v8/src/scopes.h
@@ -370,8 +370,8 @@ class Scope: public ZoneObject {
   int num_heap_slots_;
 
   // Serialized scopes support.
-  SerializedScopeInfo* scope_info_;
-  bool resolved() { return scope_info_ != NULL; }
+  Handle<SerializedScopeInfo> scope_info_;
+  bool resolved() { return !scope_info_.is_null(); }
 
   // Create a non-local variable with a given name.
   // These variables are looked up dynamically at runtime.
@@ -406,7 +406,7 @@ class Scope: public ZoneObject {
   void AllocateVariablesRecursively();
 
  private:
-  Scope(Scope* inner_scope, SerializedScopeInfo* scope_info);
+  Scope(Scope* inner_scope, Handle<SerializedScopeInfo> scope_info);
 
   void AddInnerScope(Scope* inner_scope) {
     if (inner_scope != NULL) {
@@ -417,27 +417,7 @@ class Scope: public ZoneObject {
 
   void SetDefaults(Type type,
                    Scope* outer_scope,
-                   SerializedScopeInfo* scope_info) {
-    outer_scope_ = outer_scope;
-    type_ = type;
-    scope_name_ = Factory::empty_symbol();
-    dynamics_ = NULL;
-    receiver_ = NULL;
-    function_ = NULL;
-    arguments_ = NULL;
-    arguments_shadow_ = NULL;
-    illegal_redecl_ = NULL;
-    scope_inside_with_ = false;
-    scope_contains_with_ = false;
-    scope_calls_eval_ = false;
-    outer_scope_calls_eval_ = false;
-    inner_scope_calls_eval_ = false;
-    outer_scope_is_eval_scope_ = false;
-    force_eager_compilation_ = false;
-    num_stack_slots_ = 0;
-    num_heap_slots_ = 0;
-    scope_info_ = scope_info;
-  }
+                   Handle<SerializedScopeInfo> scope_info);
 };
 
 
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index 7647f4e2f..39328dcb7 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -35,7 +35,7 @@
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     1
 #define BUILD_NUMBER      8
-#define PATCH_LEVEL       8
+#define PATCH_LEVEL       10
 #define CANDIDATE_VERSION false
 
 // Define SONAME to have the SCons build the put a specific SONAME into the
diff --git a/deps/v8/src/x64/lithium-codegen-x64.cc b/deps/v8/src/x64/lithium-codegen-x64.cc
index 5bc027590..48844a5bf 100644
--- a/deps/v8/src/x64/lithium-codegen-x64.cc
+++ b/deps/v8/src/x64/lithium-codegen-x64.cc
@@ -429,14 +429,16 @@ void LCodeGen::AddToTranslation(Translation* translation,
 }
 
 
-void LCodeGen::CallCode(Handle<Code> code,
-                        RelocInfo::Mode mode,
-                        LInstruction* instr) {
+void LCodeGen::CallCodeGeneric(Handle<Code> code,
+                               RelocInfo::Mode mode,
+                               LInstruction* instr,
+                               SafepointMode safepoint_mode,
+                               int argc) {
   ASSERT(instr != NULL);
   LPointerMap* pointers = instr->pointer_map();
   RecordPosition(pointers->position());
   __ call(code, mode);
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, safepoint_mode, argc);
 
   // Signal that we don't inline smi code before these stubs in the
   // optimizing code generator.
@@ -447,6 +449,13 @@ void LCodeGen::CallCode(Handle<Code> code,
 }
 
 
+void LCodeGen::CallCode(Handle<Code> code,
+                        RelocInfo::Mode mode,
+                        LInstruction* instr) {
+  CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT, 0);
+}
+
+
 void LCodeGen::CallRuntime(Runtime::Function* function,
                            int num_arguments,
                            LInstruction* instr) {
@@ -456,11 +465,23 @@ void LCodeGen::CallRuntime(Runtime::Function* function,
   RecordPosition(pointers->position());
 
   __ CallRuntime(function, num_arguments);
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT, 0);
+}
+
+
+void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id,
+                                       int argc,
+                                       LInstruction* instr) {
+  __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
+  __ CallRuntimeSaveDoubles(id);
+  RecordSafepointWithRegisters(
+      instr->pointer_map(), argc, Safepoint::kNoDeoptimizationIndex);
 }
 
 
-void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
+void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr,
+                                          SafepointMode safepoint_mode,
+                                          int argc) {
   // Create the environment to bailout to. If the call has side effects
   // execution has to continue after the call otherwise execution can continue
   // from a previous bailout point repeating the call.
@@ -472,8 +493,17 @@ void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) {
   }
 
   RegisterEnvironmentForDeoptimization(deoptimization_environment);
-  RecordSafepoint(instr->pointer_map(),
-                  deoptimization_environment->deoptimization_index());
+  if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) {
+    ASSERT(argc == 0);
+    RecordSafepoint(instr->pointer_map(),
+                    deoptimization_environment->deoptimization_index());
+  } else {
+    ASSERT(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS);
+    RecordSafepointWithRegisters(
+        instr->pointer_map(),
+        argc,
+        deoptimization_environment->deoptimization_index());
+  }
 }
 
 
@@ -598,6 +628,8 @@ void LCodeGen::RecordSafepoint(
     Safepoint::Kind kind,
     int arguments,
     int deoptimization_index) {
+  ASSERT(kind == expected_safepoint_kind_);
+
   const ZoneList<LOperand*>* operands = pointers->operands();
 
   Safepoint safepoint = safepoints_.DefineSafepoint(masm(),
@@ -1260,11 +1292,8 @@ void LCodeGen::EmitGoto(int block, LDeferredCode* deferred_stack_check) {
 
 
 void LCodeGen::DoDeferredStackCheck(LGoto* instr) {
-  __ Pushad();
-  __ CallRuntimeSaveDoubles(Runtime::kStackGuard);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
-  __ Popad();
+  PushSafepointRegistersScope scope(this);
+  CallRuntimeFromDeferred(Runtime::kStackGuard, 0, instr);
 }
 
 
@@ -1827,16 +1856,21 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
 
 
 void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
-  __ PushSafepointRegisters();
+  {
+    PushSafepointRegistersScope scope(this);
 
-  InstanceofStub stub(InstanceofStub::kNoFlags);
+    InstanceofStub stub(InstanceofStub::kNoFlags);
 
-  __ push(ToRegister(instr->InputAt(0)));
-  __ Push(instr->function());
-  __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
-  __ movq(kScratchRegister, rax);
-  __ PopSafepointRegisters();
+    __ push(ToRegister(instr->InputAt(0)));
+    __ Push(instr->function());
+    __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
+    CallCodeGeneric(stub.GetCode(),
+                    RelocInfo::CODE_TARGET,
+                    instr,
+                    RECORD_SAFEPOINT_WITH_REGISTERS,
+                    2);
+    __ movq(kScratchRegister, rax);
+  }
   __ testq(kScratchRegister, kScratchRegister);
   Label load_false;
   Label done;
@@ -2292,7 +2326,7 @@ void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
   }
 
   // Setup deoptimization.
-  RegisterLazyDeoptimization(instr);
+  RegisterLazyDeoptimization(instr, RECORD_SIMPLE_SAFEPOINT, 0);
 
   // Restore context.
   __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
@@ -2317,7 +2351,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   Register tmp2 = tmp.is(rcx) ? rdx : input_reg.is(rcx) ? rdx : rcx;
 
   // Preserve the value of all registers.
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
 
   Label negative;
   __ movl(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset));
@@ -2338,9 +2372,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   // Slow case: Call the runtime system to do the number allocation.
   __ bind(&slow);
 
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   // Set the pointer to the new heap number in tmp.
   if (!tmp.is(rax)) {
     __ movq(tmp, rax);
@@ -2357,7 +2389,6 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
   __ StoreToSafepointRegisterSlot(input_reg, tmp);
 
   __ bind(&done);
-  __ PopSafepointRegisters();
 }
 
 
@@ -2884,7 +2915,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
   // contained in the register pointer map.
   __ Set(result, 0);
 
-  __ PushSafepointRegisters();
+  PushSafepointRegistersScope scope(this);
   __ push(string);
   // Push the index as a smi. This is safe because of the checks in
   // DoStringCharCodeAt above.
@@ -2897,16 +2928,12 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ Integer32ToSmi(index, index);
     __ push(index);
   }
-  __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-  __ CallRuntimeSaveDoubles(Runtime::kStringCharCodeAt);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 2, Safepoint::kNoDeoptimizationIndex);
+  CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
   if (FLAG_debug_code) {
     __ AbortIfNotSmi(rax);
   }
   __ SmiToInteger32(rax, rax);
   __ StoreToSafepointRegisterSlot(result, rax);
-  __ PopSafepointRegisters();
 }
 
 
@@ -2971,13 +2998,12 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   Register reg = ToRegister(instr->result());
   __ Move(reg, Smi::FromInt(0));
 
-  __ PushSafepointRegisters();
-  __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
-  RecordSafepointWithRegisters(
-      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
-  // Ensure that value in rax survives popping registers.
-  __ movq(kScratchRegister, rax);
-  __ PopSafepointRegisters();
+  {
+    PushSafepointRegistersScope scope(this);
+    CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
+    // Ensure that value in rax survives popping registers.
+    __ movq(kScratchRegister, rax);
+  }
   __ movq(reg, kScratchRegister);
 }
 
diff --git a/deps/v8/src/x64/lithium-codegen-x64.h b/deps/v8/src/x64/lithium-codegen-x64.h
index 420556a58..88832faf7 100644
--- a/deps/v8/src/x64/lithium-codegen-x64.h
+++ b/deps/v8/src/x64/lithium-codegen-x64.h
@@ -60,7 +60,8 @@ class LCodeGen BASE_EMBEDDED {
         status_(UNUSED),
         deferred_(8),
         osr_pc_offset_(-1),
-        resolver_(this) {
+        resolver_(this),
+        expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
@@ -151,12 +152,26 @@ class LCodeGen BASE_EMBEDDED {
   bool GenerateJumpTable();
   bool GenerateSafepointTable();
 
+  enum SafepointMode {
+    RECORD_SIMPLE_SAFEPOINT,
+    RECORD_SAFEPOINT_WITH_REGISTERS
+  };
+
+  void CallCodeGeneric(Handle<Code> code,
+                       RelocInfo::Mode mode,
+                       LInstruction* instr,
+                       SafepointMode safepoint_mode,
+                       int argc);
+
+
   void CallCode(Handle<Code> code,
                 RelocInfo::Mode mode,
                 LInstruction* instr);
+
   void CallRuntime(Runtime::Function* function,
                    int num_arguments,
                    LInstruction* instr);
+
   void CallRuntime(Runtime::FunctionId id,
                    int num_arguments,
                    LInstruction* instr) {
@@ -164,6 +179,11 @@ class LCodeGen BASE_EMBEDDED {
     CallRuntime(function, num_arguments, instr);
   }
 
+  void CallRuntimeFromDeferred(Runtime::FunctionId id,
+                               int argc,
+                               LInstruction* instr);
+
+
   // Generate a direct call to a known function.  Expects the function
   // to be in edi.
   void CallKnownFunction(Handle<JSFunction> function,
@@ -172,7 +192,9 @@ class LCodeGen BASE_EMBEDDED {
 
   void LoadHeapObject(Register result, Handle<HeapObject> object);
 
-  void RegisterLazyDeoptimization(LInstruction* instr);
+  void RegisterLazyDeoptimization(LInstruction* instr,
+                                  SafepointMode safepoint_mode,
+                                  int argc);
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
   void DeoptimizeIf(Condition cc, LEnvironment* environment);
 
@@ -268,6 +290,27 @@ class LCodeGen BASE_EMBEDDED {
   // Compiler from a set of parallel moves to a sequential list of moves.
   LGapResolver resolver_;
 
+  Safepoint::Kind expected_safepoint_kind_;
+
+  class PushSafepointRegistersScope BASE_EMBEDDED {
+   public:
+    explicit PushSafepointRegistersScope(LCodeGen* codegen)
+        : codegen_(codegen) {
+      ASSERT(codegen_->expected_safepoint_kind_ == Safepoint::kSimple);
+      codegen_->masm_->PushSafepointRegisters();
+      codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters;
+    }
+
+    ~PushSafepointRegistersScope() {
+      ASSERT(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters);
+      codegen_->masm_->PopSafepointRegisters();
+      codegen_->expected_safepoint_kind_ = Safepoint::kSimple;
+    }
+
+   private:
+    LCodeGen* codegen_;
+  };
+
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;
diff --git a/deps/v8/src/x64/macro-assembler-x64.h b/deps/v8/src/x64/macro-assembler-x64.h
index 4cf59c4e8..9557940a9 100644
--- a/deps/v8/src/x64/macro-assembler-x64.h
+++ b/deps/v8/src/x64/macro-assembler-x64.h
@@ -976,6 +976,10 @@ class MacroAssembler: public Assembler {
   void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
   bool allow_stub_calls() { return allow_stub_calls_; }
 
+  static int SafepointRegisterStackIndex(Register reg) {
+    return SafepointRegisterStackIndex(reg.code());
+  }
+
  private:
   // Order general registers are pushed by Pushad.
   // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r12, r14.