Move IC code into a subdir and move ic-compilation related code from stub-cache into ic-compiler

src/x64/ic-x64.cc

Index: src/x64/ic-x64.cc
diff --git a/src/x64/ic-x64.cc b/src/x64/ic-x64.cc
deleted file mode 100644
index 69e14135b0d0e7d832a84ce6343a857045f71342..0000000000000000000000000000000000000000
--- a/src/x64/ic-x64.cc
+++ /dev/null
@@ -1,1237 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "src/v8.h"
-
-#if V8_TARGET_ARCH_X64
-
-#include "src/codegen.h"
-#include "src/ic-inl.h"
-#include "src/runtime.h"
-#include "src/stub-cache.h"
-
-namespace v8 {
-namespace internal {
-
-// ----------------------------------------------------------------------------
-// Static IC stub generators.
-//
-
-#define __ ACCESS_MASM(masm)
-
-
-static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm,
-                                            Register type,
-                                            Label* global_object) {
-  // Register usage:
-  //   type: holds the receiver instance type on entry.
-  __ cmpb(type, Immediate(JS_GLOBAL_OBJECT_TYPE));
-  __ j(equal, global_object);
-  __ cmpb(type, Immediate(JS_BUILTINS_OBJECT_TYPE));
-  __ j(equal, global_object);
-  __ cmpb(type, Immediate(JS_GLOBAL_PROXY_TYPE));
-  __ j(equal, global_object);
-}
-
-
-// Helper function used to load a property from a dictionary backing storage.
-// This function may return false negatives, so miss_label
-// must always call a backup property load that is complete.
-// This function is safe to call if name is not an internalized string,
-// and will jump to the miss_label in that case.
-// The generated code assumes that the receiver has slow properties,
-// is not a global object and does not have interceptors.
-static void GenerateDictionaryLoad(MacroAssembler* masm,
-                                   Label* miss_label,
-                                   Register elements,
-                                   Register name,
-                                   Register r0,
-                                   Register r1,
-                                   Register result) {
-  // Register use:
-  //
-  // elements - holds the property dictionary on entry and is unchanged.
-  //
-  // name - holds the name of the property on entry and is unchanged.
-  //
-  // r0   - used to hold the capacity of the property dictionary.
-  //
-  // r1   - used to hold the index into the property dictionary.
-  //
-  // result - holds the result on exit if the load succeeded.
-
-  Label done;
-
-  // Probe the dictionary.
-  NameDictionaryLookupStub::GeneratePositiveLookup(masm,
-                                                   miss_label,
-                                                   &done,
-                                                   elements,
-                                                   name,
-                                                   r0,
-                                                   r1);
-
-  // If probing finds an entry in the dictionary, r1 contains the
-  // index into the dictionary. Check that the value is a normal
-  // property.
-  __ bind(&done);
-  const int kElementsStartOffset =
-      NameDictionary::kHeaderSize +
-      NameDictionary::kElementsStartIndex * kPointerSize;
-  const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
-  __ Test(Operand(elements, r1, times_pointer_size,
-                  kDetailsOffset - kHeapObjectTag),
-          Smi::FromInt(PropertyDetails::TypeField::kMask));
-  __ j(not_zero, miss_label);
-
-  // Get the value at the masked, scaled index.
-  const int kValueOffset = kElementsStartOffset + kPointerSize;
-  __ movp(result,
-          Operand(elements, r1, times_pointer_size,
-                  kValueOffset - kHeapObjectTag));
-}
-
-
-// Helper function used to store a property to a dictionary backing
-// storage. This function may fail to store a property even though it
-// is in the dictionary, so code at miss_label must always call a
-// backup property store that is complete. This function is safe to
-// call if name is not an internalized string, and will jump to the miss_label
-// in that case. The generated code assumes that the receiver has slow
-// properties, is not a global object and does not have interceptors.
-static void GenerateDictionaryStore(MacroAssembler* masm,
-                                    Label* miss_label,
-                                    Register elements,
-                                    Register name,
-                                    Register value,
-                                    Register scratch0,
-                                    Register scratch1) {
-  // Register use:
-  //
-  // elements - holds the property dictionary on entry and is clobbered.
-  //
-  // name - holds the name of the property on entry and is unchanged.
-  //
-  // value - holds the value to store and is unchanged.
-  //
-  // scratch0 - used during the positive dictionary lookup and is clobbered.
-  //
-  // scratch1 - used for index into the property dictionary and is clobbered.
-  Label done;
-
-  // Probe the dictionary.
-  NameDictionaryLookupStub::GeneratePositiveLookup(masm,
-                                                   miss_label,
-                                                   &done,
-                                                   elements,
-                                                   name,
-                                                   scratch0,
-                                                   scratch1);
-
-  // If probing finds an entry in the dictionary, scratch0 contains the
-  // index into the dictionary. Check that the value is a normal
-  // property that is not read only.
-  __ bind(&done);
-  const int kElementsStartOffset =
-      NameDictionary::kHeaderSize +
-      NameDictionary::kElementsStartIndex * kPointerSize;
-  const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
-  const int kTypeAndReadOnlyMask =
-      (PropertyDetails::TypeField::kMask |
-       PropertyDetails::AttributesField::encode(READ_ONLY)) << kSmiTagSize;
-  __ Test(Operand(elements,
-                  scratch1,
-                  times_pointer_size,
-                  kDetailsOffset - kHeapObjectTag),
-          Smi::FromInt(kTypeAndReadOnlyMask));
-  __ j(not_zero, miss_label);
-
-  // Store the value at the masked, scaled index.
-  const int kValueOffset = kElementsStartOffset + kPointerSize;
-  __ leap(scratch1, Operand(elements,
-                           scratch1,
-                           times_pointer_size,
-                           kValueOffset - kHeapObjectTag));
-  __ movp(Operand(scratch1, 0), value);
-
-  // Update write barrier. Make sure not to clobber the value.
-  __ movp(scratch0, value);
-  __ RecordWrite(elements, scratch1, scratch0, kDontSaveFPRegs);
-}
-
-
-// Checks the receiver for special cases (value type, slow case bits).
-// Falls through for regular JS object.
-static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm,
-                                           Register receiver,
-                                           Register map,
-                                           int interceptor_bit,
-                                           Label* slow) {
-  // Register use:
-  //   receiver - holds the receiver and is unchanged.
-  // Scratch registers:
-  //   map - used to hold the map of the receiver.
-
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(receiver, slow);
-
-  // Check that the object is some kind of JS object EXCEPT JS Value type.
-  // In the case that the object is a value-wrapper object,
-  // we enter the runtime system to make sure that indexing
-  // into string objects work as intended.
-  DCHECK(JS_OBJECT_TYPE > JS_VALUE_TYPE);
-  __ CmpObjectType(receiver, JS_OBJECT_TYPE, map);
-  __ j(below, slow);
-
-  // Check bit field.
-  __ testb(FieldOperand(map, Map::kBitFieldOffset),
-           Immediate((1 << Map::kIsAccessCheckNeeded) |
-                     (1 << interceptor_bit)));
-  __ j(not_zero, slow);
-}
-
-
-// Loads an indexed element from a fast case array.
-// If not_fast_array is NULL, doesn't perform the elements map check.
-static void GenerateFastArrayLoad(MacroAssembler* masm,
-                                  Register receiver,
-                                  Register key,
-                                  Register elements,
-                                  Register scratch,
-                                  Register result,
-                                  Label* not_fast_array,
-                                  Label* out_of_range) {
-  // Register use:
-  //
-  // receiver - holds the receiver on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // key      - holds the smi key on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // elements - holds the elements of the receiver on exit.
-  //
-  // result   - holds the result on exit if the load succeeded.
-  //            Allowed to be the the same as 'receiver' or 'key'.
-  //            Unchanged on bailout so 'receiver' and 'key' can be safely
-  //            used by further computation.
-  //
-  // Scratch registers:
-  //
-  //   scratch - used to hold elements of the receiver and the loaded value.
-
-  __ movp(elements, FieldOperand(receiver, JSObject::kElementsOffset));
-  if (not_fast_array != NULL) {
-    // Check that the object is in fast mode and writable.
-    __ CompareRoot(FieldOperand(elements, HeapObject::kMapOffset),
-                   Heap::kFixedArrayMapRootIndex);
-    __ j(not_equal, not_fast_array);
-  } else {
-    __ AssertFastElements(elements);
-  }
-  // Check that the key (index) is within bounds.
-  __ SmiCompare(key, FieldOperand(elements, FixedArray::kLengthOffset));
-  // Unsigned comparison rejects negative indices.
-  __ j(above_equal, out_of_range);
-  // Fast case: Do the load.
-  SmiIndex index = masm->SmiToIndex(scratch, key, kPointerSizeLog2);
-  __ movp(scratch, FieldOperand(elements,
-                                index.reg,
-                                index.scale,
-                                FixedArray::kHeaderSize));
-  __ CompareRoot(scratch, Heap::kTheHoleValueRootIndex);
-  // In case the loaded value is the_hole we have to consult GetProperty
-  // to ensure the prototype chain is searched.
-  __ j(equal, out_of_range);
-  if (!result.is(scratch)) {
-    __ movp(result, scratch);
-  }
-}
-
-
-// Checks whether a key is an array index string or a unique name.
-// Falls through if the key is a unique name.
-static void GenerateKeyNameCheck(MacroAssembler* masm,
-                                 Register key,
-                                 Register map,
-                                 Register hash,
-                                 Label* index_string,
-                                 Label* not_unique) {
-  // Register use:
-  //   key - holds the key and is unchanged. Assumed to be non-smi.
-  // Scratch registers:
-  //   map - used to hold the map of the key.
-  //   hash - used to hold the hash of the key.
-  Label unique;
-  __ CmpObjectType(key, LAST_UNIQUE_NAME_TYPE, map);
-  __ j(above, not_unique);
-  STATIC_ASSERT(LAST_UNIQUE_NAME_TYPE == FIRST_NONSTRING_TYPE);
-  __ j(equal, &unique);
-
-  // Is the string an array index, with cached numeric value?
-  __ movl(hash, FieldOperand(key, Name::kHashFieldOffset));
-  __ testl(hash, Immediate(Name::kContainsCachedArrayIndexMask));
-  __ j(zero, index_string);  // The value in hash is used at jump target.
-
-  // Is the string internalized? We already know it's a string so a single
-  // bit test is enough.
-  STATIC_ASSERT(kNotInternalizedTag != 0);
-  __ testb(FieldOperand(map, Map::kInstanceTypeOffset),
-           Immediate(kIsNotInternalizedMask));
-  __ j(not_zero, not_unique);
-
-  __ bind(&unique);
-}
-
-
-
-void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Label slow, check_name, index_smi, index_name, property_array_property;
-  Label probe_dictionary, check_number_dictionary;
-
-  Register receiver = ReceiverRegister();
-  Register key = NameRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(key.is(rcx));
-
-  // Check that the key is a smi.
-  __ JumpIfNotSmi(key, &check_name);
-  __ bind(&index_smi);
-  // Now the key is known to be a smi. This place is also jumped to from below
-  // where a numeric string is converted to a smi.
-
-  GenerateKeyedLoadReceiverCheck(
-      masm, receiver, rax, Map::kHasIndexedInterceptor, &slow);
-
-  // Check the receiver's map to see if it has fast elements.
-  __ CheckFastElements(rax, &check_number_dictionary);
-
-  GenerateFastArrayLoad(masm,
-                        receiver,
-                        key,
-                        rax,
-                        rbx,
-                        rax,
-                        NULL,
-                        &slow);
-  Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->keyed_load_generic_smi(), 1);
-  __ ret(0);
-
-  __ bind(&check_number_dictionary);
-  __ SmiToInteger32(rbx, key);
-  __ movp(rax, FieldOperand(receiver, JSObject::kElementsOffset));
-
-  // Check whether the elements is a number dictionary.
-  // rbx: key as untagged int32
-  // rax: elements
-  __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset),
-                 Heap::kHashTableMapRootIndex);
-  __ j(not_equal, &slow);
-  __ LoadFromNumberDictionary(&slow, rax, key, rbx, r9, rdi, rax);
-  __ ret(0);
-
-  __ bind(&slow);
-  // Slow case: Jump to runtime.
-  __ IncrementCounter(counters->keyed_load_generic_slow(), 1);
-  GenerateRuntimeGetProperty(masm);
-
-  __ bind(&check_name);
-  GenerateKeyNameCheck(masm, key, rax, rbx, &index_name, &slow);
-
-  GenerateKeyedLoadReceiverCheck(
-      masm, receiver, rax, Map::kHasNamedInterceptor, &slow);
-
-  // If the receiver is a fast-case object, check the keyed lookup
-  // cache. Otherwise probe the dictionary leaving result in key.
-  __ movp(rbx, FieldOperand(receiver, JSObject::kPropertiesOffset));
-  __ CompareRoot(FieldOperand(rbx, HeapObject::kMapOffset),
-                 Heap::kHashTableMapRootIndex);
-  __ j(equal, &probe_dictionary);
-
-  // Load the map of the receiver, compute the keyed lookup cache hash
-  // based on 32 bits of the map pointer and the string hash.
-  __ movp(rbx, FieldOperand(receiver, HeapObject::kMapOffset));
-  __ movl(rax, rbx);
-  __ shrl(rax, Immediate(KeyedLookupCache::kMapHashShift));
-  __ movl(rdi, FieldOperand(key, String::kHashFieldOffset));
-  __ shrl(rdi, Immediate(String::kHashShift));
-  __ xorp(rax, rdi);
-  int mask = (KeyedLookupCache::kCapacityMask & KeyedLookupCache::kHashMask);
-  __ andp(rax, Immediate(mask));
-
-  // Load the key (consisting of map and internalized string) from the cache and
-  // check for match.
-  Label load_in_object_property;
-  static const int kEntriesPerBucket = KeyedLookupCache::kEntriesPerBucket;
-  Label hit_on_nth_entry[kEntriesPerBucket];
-  ExternalReference cache_keys
-      = ExternalReference::keyed_lookup_cache_keys(masm->isolate());
-
-  for (int i = 0; i < kEntriesPerBucket - 1; i++) {
-    Label try_next_entry;
-    __ movp(rdi, rax);
-    __ shlp(rdi, Immediate(kPointerSizeLog2 + 1));
-    __ LoadAddress(kScratchRegister, cache_keys);
-    int off = kPointerSize * i * 2;
-    __ cmpp(rbx, Operand(kScratchRegister, rdi, times_1, off));
-    __ j(not_equal, &try_next_entry);
-    __ cmpp(key, Operand(kScratchRegister, rdi, times_1, off + kPointerSize));
-    __ j(equal, &hit_on_nth_entry[i]);
-    __ bind(&try_next_entry);
-  }
-
-  int off = kPointerSize * (kEntriesPerBucket - 1) * 2;
-  __ cmpp(rbx, Operand(kScratchRegister, rdi, times_1, off));
-  __ j(not_equal, &slow);
-  __ cmpp(key, Operand(kScratchRegister, rdi, times_1, off + kPointerSize));
-  __ j(not_equal, &slow);
-
-  // Get field offset, which is a 32-bit integer.
-  ExternalReference cache_field_offsets
-      = ExternalReference::keyed_lookup_cache_field_offsets(masm->isolate());
-
-  // Hit on nth entry.
-  for (int i = kEntriesPerBucket - 1; i >= 0; i--) {
-    __ bind(&hit_on_nth_entry[i]);
-    if (i != 0) {
-      __ addl(rax, Immediate(i));
-    }
-    __ LoadAddress(kScratchRegister, cache_field_offsets);
-    __ movl(rdi, Operand(kScratchRegister, rax, times_4, 0));
-    __ movzxbp(rax, FieldOperand(rbx, Map::kInObjectPropertiesOffset));
-    __ subp(rdi, rax);
-    __ j(above_equal, &property_array_property);
-    if (i != 0) {
-      __ jmp(&load_in_object_property);
-    }
-  }
-
-  // Load in-object property.
-  __ bind(&load_in_object_property);
-  __ movzxbp(rax, FieldOperand(rbx, Map::kInstanceSizeOffset));
-  __ addp(rax, rdi);
-  __ movp(rax, FieldOperand(receiver, rax, times_pointer_size, 0));
-  __ IncrementCounter(counters->keyed_load_generic_lookup_cache(), 1);
-  __ ret(0);
-
-  // Load property array property.
-  __ bind(&property_array_property);
-  __ movp(rax, FieldOperand(receiver, JSObject::kPropertiesOffset));
-  __ movp(rax, FieldOperand(rax, rdi, times_pointer_size,
-                            FixedArray::kHeaderSize));
-  __ IncrementCounter(counters->keyed_load_generic_lookup_cache(), 1);
-  __ ret(0);
-
-  // Do a quick inline probe of the receiver's dictionary, if it
-  // exists.
-  __ bind(&probe_dictionary);
-  // rbx: elements
-
-  __ movp(rax, FieldOperand(receiver, JSObject::kMapOffset));
-  __ movb(rax, FieldOperand(rax, Map::kInstanceTypeOffset));
-  GenerateGlobalInstanceTypeCheck(masm, rax, &slow);
-
-  GenerateDictionaryLoad(masm, &slow, rbx, key, rax, rdi, rax);
-  __ IncrementCounter(counters->keyed_load_generic_symbol(), 1);
-  __ ret(0);
-
-  __ bind(&index_name);
-  __ IndexFromHash(rbx, key);
-  __ jmp(&index_smi);
-}
-
-
-void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
-  // Return address is on the stack.
-  Label miss;
-
-  Register receiver = ReceiverRegister();
-  Register index = NameRegister();
-  Register scratch = rbx;
-  Register result = rax;
-  DCHECK(!scratch.is(receiver) && !scratch.is(index));
-
-  StringCharAtGenerator char_at_generator(receiver,
-                                          index,
-                                          scratch,
-                                          result,
-                                          &miss,  // When not a string.
-                                          &miss,  // When not a number.
-                                          &miss,  // When index out of range.
-                                          STRING_INDEX_IS_ARRAY_INDEX);
-  char_at_generator.GenerateFast(masm);
-  __ ret(0);
-
-  StubRuntimeCallHelper call_helper;
-  char_at_generator.GenerateSlow(masm, call_helper);
-
-  __ bind(&miss);
-  GenerateMiss(masm);
-}
-
-
-void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
-  // Return address is on the stack.
-  Label slow;
-
-  Register receiver = ReceiverRegister();
-  Register key = NameRegister();
-  Register scratch = rax;
-  DCHECK(!scratch.is(receiver) && !scratch.is(key));
-
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(receiver, &slow);
-
-  // Check that the key is an array index, that is Uint32.
-  STATIC_ASSERT(kSmiValueSize <= 32);
-  __ JumpUnlessNonNegativeSmi(key, &slow);
-
-  // Get the map of the receiver.
-  __ movp(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
-
-  // Check that it has indexed interceptor and access checks
-  // are not enabled for this object.
-  __ movb(scratch, FieldOperand(scratch, Map::kBitFieldOffset));
-  __ andb(scratch, Immediate(kSlowCaseBitFieldMask));
-  __ cmpb(scratch, Immediate(1 << Map::kHasIndexedInterceptor));
-  __ j(not_zero, &slow);
-
-  // Everything is fine, call runtime.
-  __ PopReturnAddressTo(scratch);
-  __ Push(receiver);  // receiver
-  __ Push(key);       // key
-  __ PushReturnAddressFrom(scratch);
-
-  // Perform tail call to the entry.
-  __ TailCallExternalReference(
-      ExternalReference(IC_Utility(kLoadElementWithInterceptor),
-                        masm->isolate()),
-      2, 1);
-
-  __ bind(&slow);
-  GenerateMiss(masm);
-}
-
-
-static void KeyedStoreGenerateGenericHelper(
-    MacroAssembler* masm,
-    Label* fast_object,
-    Label* fast_double,
-    Label* slow,
-    KeyedStoreCheckMap check_map,
-    KeyedStoreIncrementLength increment_length) {
-  Label transition_smi_elements;
-  Label finish_object_store, non_double_value, transition_double_elements;
-  Label fast_double_without_map_check;
-  Register receiver = KeyedStoreIC::ReceiverRegister();
-  Register key = KeyedStoreIC::NameRegister();
-  Register value = KeyedStoreIC::ValueRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(key.is(rcx));
-  DCHECK(value.is(rax));
-  // Fast case: Do the store, could be either Object or double.
-  __ bind(fast_object);
-  // rbx: receiver's elements array (a FixedArray)
-  // receiver is a JSArray.
-  // r9: map of receiver
-  if (check_map == kCheckMap) {
-    __ movp(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
-    __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
-    __ j(not_equal, fast_double);
-  }
-
-  // HOLECHECK: guards "A[i] = V"
-  // We have to go to the runtime if the current value is the hole because
-  // there may be a callback on the element
-  Label holecheck_passed1;
-  __ movp(kScratchRegister, FieldOperand(rbx,
-                                         key,
-                                         times_pointer_size,
-                                         FixedArray::kHeaderSize));
-  __ CompareRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
-  __ j(not_equal, &holecheck_passed1);
-  __ JumpIfDictionaryInPrototypeChain(receiver, rdi, kScratchRegister, slow);
-
-  __ bind(&holecheck_passed1);
-
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(value, &non_smi_value);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ leal(rdi, Operand(key, 1));
-    __ Integer32ToSmiField(FieldOperand(receiver, JSArray::kLengthOffset), rdi);
-  }
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ movp(FieldOperand(rbx, key, times_pointer_size, FixedArray::kHeaderSize),
-          value);
-  __ ret(0);
-
-  __ bind(&non_smi_value);
-  // Writing a non-smi, check whether array allows non-smi elements.
-  // r9: receiver's map
-  __ CheckFastObjectElements(r9, &transition_smi_elements);
-
-  __ bind(&finish_object_store);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ leal(rdi, Operand(key, 1));
-    __ Integer32ToSmiField(FieldOperand(receiver, JSArray::kLengthOffset), rdi);
-  }
-  __ movp(FieldOperand(rbx, key, times_pointer_size, FixedArray::kHeaderSize),
-          value);
-  __ movp(rdx, value);  // Preserve the value which is returned.
-  __ RecordWriteArray(
-      rbx, rdx, key, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  __ ret(0);
-
-  __ bind(fast_double);
-  if (check_map == kCheckMap) {
-    // Check for fast double array case. If this fails, call through to the
-    // runtime.
-    // rdi: elements array's map
-    __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
-    __ j(not_equal, slow);
-  }
-
-  // HOLECHECK: guards "A[i] double hole?"
-  // We have to see if the double version of the hole is present. If so
-  // go to the runtime.
-  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
-  __ cmpl(FieldOperand(rbx, key, times_8, offset), Immediate(kHoleNanUpper32));
-  __ j(not_equal, &fast_double_without_map_check);
-  __ JumpIfDictionaryInPrototypeChain(receiver, rdi, kScratchRegister, slow);
-
-  __ bind(&fast_double_without_map_check);
-  __ StoreNumberToDoubleElements(value, rbx, key, xmm0,
-                                 &transition_double_elements);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ leal(rdi, Operand(key, 1));
-    __ Integer32ToSmiField(FieldOperand(receiver, JSArray::kLengthOffset), rdi);
-  }
-  __ ret(0);
-
-  __ bind(&transition_smi_elements);
-  __ movp(rbx, FieldOperand(receiver, HeapObject::kMapOffset));
-
-  // Transition the array appropriately depending on the value type.
-  __ movp(r9, FieldOperand(value, HeapObject::kMapOffset));
-  __ CompareRoot(r9, Heap::kHeapNumberMapRootIndex);
-  __ j(not_equal, &non_double_value);
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS ->
-  // FAST_DOUBLE_ELEMENTS and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_DOUBLE_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         slow);
-  AllocationSiteMode mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS,
-                                                    FAST_DOUBLE_ELEMENTS);
-  ElementsTransitionGenerator::GenerateSmiToDouble(
-      masm, receiver, key, value, rbx, mode, slow);
-  __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         slow);
-  mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_ELEMENTS);
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
-      masm, receiver, key, value, rbx, mode, slow);
-  __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
-  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
-  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
-  __ movp(rbx, FieldOperand(receiver, HeapObject::kMapOffset));
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         slow);
-  mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS);
-  ElementsTransitionGenerator::GenerateDoubleToObject(
-      masm, receiver, key, value, rbx, mode, slow);
-  __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-}
-
-
-void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
-                                   StrictMode strict_mode) {
-  // Return address is on the stack.
-  Label slow, slow_with_tagged_index, fast_object, fast_object_grow;
-  Label fast_double, fast_double_grow;
-  Label array, extra, check_if_double_array;
-  Register receiver = ReceiverRegister();
-  Register key = NameRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(key.is(rcx));
-
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(receiver, &slow_with_tagged_index);
-  // Get the map from the receiver.
-  __ movp(r9, FieldOperand(receiver, HeapObject::kMapOffset));
-  // Check that the receiver does not require access checks and is not observed.
-  // The generic stub does not perform map checks or handle observed objects.
-  __ testb(FieldOperand(r9, Map::kBitFieldOffset),
-           Immediate(1 << Map::kIsAccessCheckNeeded | 1 << Map::kIsObserved));
-  __ j(not_zero, &slow_with_tagged_index);
-  // Check that the key is a smi.
-  __ JumpIfNotSmi(key, &slow_with_tagged_index);
-  __ SmiToInteger32(key, key);
-
-  __ CmpInstanceType(r9, JS_ARRAY_TYPE);
-  __ j(equal, &array);
-  // Check that the object is some kind of JSObject.
-  __ CmpInstanceType(r9, FIRST_JS_OBJECT_TYPE);
-  __ j(below, &slow);
-
-  // Object case: Check key against length in the elements array.
-  __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
-  // Check array bounds.
-  __ SmiCompareInteger32(FieldOperand(rbx, FixedArray::kLengthOffset), key);
-  // rbx: FixedArray
-  __ j(above, &fast_object);
-
-  // Slow case: call runtime.
-  __ bind(&slow);
-  __ Integer32ToSmi(key, key);
-  __ bind(&slow_with_tagged_index);
-  GenerateRuntimeSetProperty(masm, strict_mode);
-  // Never returns to here.
-
-  // Extra capacity case: Check if there is extra capacity to
-  // perform the store and update the length. Used for adding one
-  // element to the array by writing to array[array.length].
-  __ bind(&extra);
-  // receiver is a JSArray.
-  // rbx: receiver's elements array (a FixedArray)
-  // flags: smicompare (receiver.length(), rbx)
-  __ j(not_equal, &slow);  // do not leave holes in the array
-  __ SmiCompareInteger32(FieldOperand(rbx, FixedArray::kLengthOffset), key);
-  __ j(below_equal, &slow);
-  // Increment index to get new length.
-  __ movp(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
-  __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
-  __ j(not_equal, &check_if_double_array);
-  __ jmp(&fast_object_grow);
-
-  __ bind(&check_if_double_array);
-  // rdi: elements array's map
-  __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
-  __ j(not_equal, &slow);
-  __ jmp(&fast_double_grow);
-
-  // Array case: Get the length and the elements array from the JS
-  // array. Check that the array is in fast mode (and writable); if it
-  // is the length is always a smi.
-  __ bind(&array);
-  // receiver is a JSArray.
-  __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
-
-  // Check the key against the length in the array, compute the
-  // address to store into and fall through to fast case.
-  __ SmiCompareInteger32(FieldOperand(receiver, JSArray::kLengthOffset), key);
-  __ j(below_equal, &extra);
-
-  KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
-                                  &slow, kCheckMap, kDontIncrementLength);
-  KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
-                                  &slow, kDontCheckMap, kIncrementLength);
-}
-
-
-static Operand GenerateMappedArgumentsLookup(MacroAssembler* masm,
-                                             Register object,
-                                             Register key,
-                                             Register scratch1,
-                                             Register scratch2,
-                                             Register scratch3,
-                                             Label* unmapped_case,
-                                             Label* slow_case) {
-  Heap* heap = masm->isolate()->heap();
-
-  // Check that the receiver is a JSObject. Because of the elements
-  // map check later, we do not need to check for interceptors or
-  // whether it requires access checks.
-  __ JumpIfSmi(object, slow_case);
-  // Check that the object is some kind of JSObject.
-  __ CmpObjectType(object, FIRST_JS_RECEIVER_TYPE, scratch1);
-  __ j(below, slow_case);
-
-  // Check that the key is a positive smi.
-  Condition check = masm->CheckNonNegativeSmi(key);
-  __ j(NegateCondition(check), slow_case);
-
-  // Load the elements into scratch1 and check its map. If not, jump
-  // to the unmapped lookup with the parameter map in scratch1.
-  Handle<Map> arguments_map(heap->sloppy_arguments_elements_map());
-  __ movp(scratch1, FieldOperand(object, JSObject::kElementsOffset));
-  __ CheckMap(scratch1, arguments_map, slow_case, DONT_DO_SMI_CHECK);
-
-  // Check if element is in the range of mapped arguments.
-  __ movp(scratch2, FieldOperand(scratch1, FixedArray::kLengthOffset));
-  __ SmiSubConstant(scratch2, scratch2, Smi::FromInt(2));
-  __ cmpp(key, scratch2);
-  __ j(greater_equal, unmapped_case);
-
-  // Load element index and check whether it is the hole.
-  const int kHeaderSize = FixedArray::kHeaderSize + 2 * kPointerSize;
-  __ SmiToInteger64(scratch3, key);
-  __ movp(scratch2, FieldOperand(scratch1,
-                                 scratch3,
-                                 times_pointer_size,
-                                 kHeaderSize));
-  __ CompareRoot(scratch2, Heap::kTheHoleValueRootIndex);
-  __ j(equal, unmapped_case);
-
-  // Load value from context and return it. We can reuse scratch1 because
-  // we do not jump to the unmapped lookup (which requires the parameter
-  // map in scratch1).
-  __ movp(scratch1, FieldOperand(scratch1, FixedArray::kHeaderSize));
-  __ SmiToInteger64(scratch3, scratch2);
-  return FieldOperand(scratch1,
-                      scratch3,
-                      times_pointer_size,
-                      Context::kHeaderSize);
-}
-
-
-static Operand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
-                                               Register key,
-                                               Register parameter_map,
-                                               Register scratch,
-                                               Label* slow_case) {
-  // Element is in arguments backing store, which is referenced by the
-  // second element of the parameter_map. The parameter_map register
-  // must be loaded with the parameter map of the arguments object and is
-  // overwritten.
-  const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
-  Register backing_store = parameter_map;
-  __ movp(backing_store, FieldOperand(parameter_map, kBackingStoreOffset));
-  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
-  __ CheckMap(backing_store, fixed_array_map, slow_case, DONT_DO_SMI_CHECK);
-  __ movp(scratch, FieldOperand(backing_store, FixedArray::kLengthOffset));
-  __ cmpp(key, scratch);
-  __ j(greater_equal, slow_case);
-  __ SmiToInteger64(scratch, key);
-  return FieldOperand(backing_store,
-                      scratch,
-                      times_pointer_size,
-                      FixedArray::kHeaderSize);
-}
-
-
-void KeyedLoadIC::GenerateSloppyArguments(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Register receiver = ReceiverRegister();
-  Register key = NameRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(key.is(rcx));
-
-  Label slow, notin;
-  Operand mapped_location =
-      GenerateMappedArgumentsLookup(
-          masm, receiver, key, rbx, rax, rdi, &notin, &slow);
-  __ movp(rax, mapped_location);
-  __ Ret();
-  __ bind(&notin);
-  // The unmapped lookup expects that the parameter map is in rbx.
-  Operand unmapped_location =
-      GenerateUnmappedArgumentsLookup(masm, key, rbx, rax, &slow);
-  __ CompareRoot(unmapped_location, Heap::kTheHoleValueRootIndex);
-  __ j(equal, &slow);
-  __ movp(rax, unmapped_location);
-  __ Ret();
-  __ bind(&slow);
-  GenerateMiss(masm);
-}
-
-
-void KeyedStoreIC::GenerateSloppyArguments(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Label slow, notin;
-  Register receiver = ReceiverRegister();
-  Register name = NameRegister();
-  Register value = ValueRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(name.is(rcx));
-  DCHECK(value.is(rax));
-
-  Operand mapped_location = GenerateMappedArgumentsLookup(
-      masm, receiver, name, rbx, rdi, r8, &notin, &slow);
-  __ movp(mapped_location, value);
-  __ leap(r9, mapped_location);
-  __ movp(r8, value);
-  __ RecordWrite(rbx,
-                 r9,
-                 r8,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 INLINE_SMI_CHECK);
-  __ Ret();
-  __ bind(&notin);
-  // The unmapped lookup expects that the parameter map is in rbx.
-  Operand unmapped_location =
-      GenerateUnmappedArgumentsLookup(masm, name, rbx, rdi, &slow);
-  __ movp(unmapped_location, value);
-  __ leap(r9, unmapped_location);
-  __ movp(r8, value);
-  __ RecordWrite(rbx,
-                 r9,
-                 r8,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 INLINE_SMI_CHECK);
-  __ Ret();
-  __ bind(&slow);
-  GenerateMiss(masm);
-}
-
-
-void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Register receiver = ReceiverRegister();
-  Register name = NameRegister();
-  DCHECK(receiver.is(rdx));
-  DCHECK(name.is(rcx));
-
-  // Probe the stub cache.
-  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::LOAD_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(
-      masm, flags, receiver, name, rbx, rax);
-
-  GenerateMiss(masm);
-}
-
-
-void LoadIC::GenerateNormal(MacroAssembler* masm) {
-  Register dictionary = rax;
-  DCHECK(!dictionary.is(ReceiverRegister()));
-  DCHECK(!dictionary.is(NameRegister()));
-
-  Label slow;
-
-  __ movp(dictionary,
-          FieldOperand(ReceiverRegister(), JSObject::kPropertiesOffset));
-  GenerateDictionaryLoad(masm, &slow, dictionary, NameRegister(), rbx, rdi,
-                         rax);
-  __ ret(0);
-
-  // Dictionary load failed, go slow (but don't miss).
-  __ bind(&slow);
-  GenerateRuntimeGetProperty(masm);
-}
-
-
-// A register that isn't one of the parameters to the load ic.
-static const Register LoadIC_TempRegister() { return rbx; }
-
-
-static const Register KeyedLoadIC_TempRegister() {
-  return rbx;
-}
-
-
-void LoadIC::GenerateMiss(MacroAssembler* masm) {
-  // The return address is on the stack.
-
-  Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->load_miss(), 1);
-
-  __ PopReturnAddressTo(LoadIC_TempRegister());
-  __ Push(ReceiverRegister());  // receiver
-  __ Push(NameRegister());  // name
-  __ PushReturnAddressFrom(LoadIC_TempRegister());
-
-  // Perform tail call to the entry.
-  ExternalReference ref =
-      ExternalReference(IC_Utility(kLoadIC_Miss), masm->isolate());
-  __ TailCallExternalReference(ref, 2, 1);
-}
-
-
-void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // The return address is on the stack.
-
-  __ PopReturnAddressTo(LoadIC_TempRegister());
-  __ Push(ReceiverRegister());  // receiver
-  __ Push(NameRegister());  // name
-  __ PushReturnAddressFrom(LoadIC_TempRegister());
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
-}
-
-
-void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->keyed_load_miss(), 1);
-
-  __ PopReturnAddressTo(KeyedLoadIC_TempRegister());
-  __ Push(ReceiverRegister());  // receiver
-  __ Push(NameRegister());  // name
-  __ PushReturnAddressFrom(KeyedLoadIC_TempRegister());
-
-  // Perform tail call to the entry.
-  ExternalReference ref =
-      ExternalReference(IC_Utility(kKeyedLoadIC_Miss), masm->isolate());
-  __ TailCallExternalReference(ref, 2, 1);
-}
-
-
-// IC register specifications
-const Register LoadIC::ReceiverRegister() { return rdx; }
-const Register LoadIC::NameRegister() { return rcx; }
-
-
-const Register LoadIC::SlotRegister() {
-  DCHECK(FLAG_vector_ics);
-  return rax;
-}
-
-
-const Register LoadIC::VectorRegister() {
-  DCHECK(FLAG_vector_ics);
-  return rbx;
-}
-
-
-const Register StoreIC::ReceiverRegister() { return rdx; }
-const Register StoreIC::NameRegister() { return rcx; }
-const Register StoreIC::ValueRegister() { return rax; }
-
-
-const Register KeyedStoreIC::MapRegister() {
-  return rbx;
-}
-
-
-void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
-  // The return address is on the stack.
-
-  __ PopReturnAddressTo(KeyedLoadIC_TempRegister());
-  __ Push(ReceiverRegister());  // receiver
-  __ Push(NameRegister());  // name
-  __ PushReturnAddressFrom(KeyedLoadIC_TempRegister());
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
-}
-
-
-void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
-  // The return address is on the stack.
-
-  // Get the receiver from the stack and probe the stub cache.
-  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::STORE_IC));
-  masm->isolate()->stub_cache()->GenerateProbe(
-      masm, flags, ReceiverRegister(), NameRegister(), rbx, no_reg);
-
-  // Cache miss: Jump to runtime.
-  GenerateMiss(masm);
-}
-
-
-static void StoreIC_PushArgs(MacroAssembler* masm) {
-  Register receiver = StoreIC::ReceiverRegister();
-  Register name = StoreIC::NameRegister();
-  Register value = StoreIC::ValueRegister();
-
-  DCHECK(!rbx.is(receiver) && !rbx.is(name) && !rbx.is(value));
-
-  __ PopReturnAddressTo(rbx);
-  __ Push(receiver);
-  __ Push(name);
-  __ Push(value);
-  __ PushReturnAddressFrom(rbx);
-}
-
-
-void StoreIC::GenerateMiss(MacroAssembler* masm) {
-  // Return address is on the stack.
-  StoreIC_PushArgs(masm);
-
-  // Perform tail call to the entry.
-  ExternalReference ref =
-      ExternalReference(IC_Utility(kStoreIC_Miss), masm->isolate());
-  __ TailCallExternalReference(ref, 3, 1);
-}
-
-
-void StoreIC::GenerateNormal(MacroAssembler* masm) {
-  Register receiver = ReceiverRegister();
-  Register name = NameRegister();
-  Register value = ValueRegister();
-  Register dictionary = rbx;
-
-  Label miss;
-
-  __ movp(dictionary, FieldOperand(receiver, JSObject::kPropertiesOffset));
-  GenerateDictionaryStore(masm, &miss, dictionary, name, value, r8, r9);
-  Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->store_normal_hit(), 1);
-  __ ret(0);
-
-  __ bind(&miss);
-  __ IncrementCounter(counters->store_normal_miss(), 1);
-  GenerateMiss(masm);
-}
-
-
-void StoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
-                                         StrictMode strict_mode) {
-  // Return address is on the stack.
-  DCHECK(!rbx.is(ReceiverRegister()) && !rbx.is(NameRegister()) &&
-         !rbx.is(ValueRegister()));
-
-  __ PopReturnAddressTo(rbx);
-  __ Push(ReceiverRegister());
-  __ Push(NameRegister());
-  __ Push(ValueRegister());
-  __ Push(Smi::FromInt(strict_mode));
-  __ PushReturnAddressFrom(rbx);
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kSetProperty, 4, 1);
-}
-
-
-void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
-                                              StrictMode strict_mode) {
-  // Return address is on the stack.
-  DCHECK(!rbx.is(ReceiverRegister()) && !rbx.is(NameRegister()) &&
-         !rbx.is(ValueRegister()));
-
-  __ PopReturnAddressTo(rbx);
-  __ Push(ReceiverRegister());
-  __ Push(NameRegister());
-  __ Push(ValueRegister());
-  __ Push(Smi::FromInt(strict_mode));   // Strict mode.
-  __ PushReturnAddressFrom(rbx);
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kSetProperty, 4, 1);
-}
-
-
-void StoreIC::GenerateSlow(MacroAssembler* masm) {
-  // Return address is on the stack.
-  StoreIC_PushArgs(masm);
-
-  // Do tail-call to runtime routine.
-  ExternalReference ref(IC_Utility(kStoreIC_Slow), masm->isolate());
-  __ TailCallExternalReference(ref, 3, 1);
-}
-
-
-void KeyedStoreIC::GenerateSlow(MacroAssembler* masm) {
-  // Return address is on the stack.
-  StoreIC_PushArgs(masm);
-
-  // Do tail-call to runtime routine.
-  ExternalReference ref(IC_Utility(kKeyedStoreIC_Slow), masm->isolate());
-  __ TailCallExternalReference(ref, 3, 1);
-}
-
-
-void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) {
-  // Return address is on the stack.
-  StoreIC_PushArgs(masm);
-
-  // Do tail-call to runtime routine.
-  ExternalReference ref =
-      ExternalReference(IC_Utility(kKeyedStoreIC_Miss), masm->isolate());
-  __ TailCallExternalReference(ref, 3, 1);
-}
-
-
-#undef __
-
-
-Condition CompareIC::ComputeCondition(Token::Value op) {
-  switch (op) {
-    case Token::EQ_STRICT:
-    case Token::EQ:
-      return equal;
-    case Token::LT:
-      return less;
-    case Token::GT:
-      return greater;
-    case Token::LTE:
-      return less_equal;
-    case Token::GTE:
-      return greater_equal;
-    default:
-      UNREACHABLE();
-      return no_condition;
-  }
-}
-
-
-bool CompareIC::HasInlinedSmiCode(Address address) {
-  // The address of the instruction following the call.
-  Address test_instruction_address =
-      address + Assembler::kCallTargetAddressOffset;
-
-  // If the instruction following the call is not a test al, nothing
-  // was inlined.
-  return *test_instruction_address == Assembler::kTestAlByte;
-}
-
-
-void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
-  // The address of the instruction following the call.
-  Address test_instruction_address =
-      address + Assembler::kCallTargetAddressOffset;
-
-  // If the instruction following the call is not a test al, nothing
-  // was inlined.
-  if (*test_instruction_address != Assembler::kTestAlByte) {
-    DCHECK(*test_instruction_address == Assembler::kNopByte);
-    return;
-  }
-
-  Address delta_address = test_instruction_address + 1;
-  // The delta to the start of the map check instruction and the
-  // condition code uses at the patched jump.
-  uint8_t delta = *reinterpret_cast<uint8_t*>(delta_address);
-  if (FLAG_trace_ic) {
-    PrintF("[  patching ic at %p, test=%p, delta=%d\n",
-           address, test_instruction_address, delta);
-  }
-
-  // Patch with a short conditional jump. Enabling means switching from a short
-  // jump-if-carry/not-carry to jump-if-zero/not-zero, whereas disabling is the
-  // reverse operation of that.
-  Address jmp_address = test_instruction_address - delta;
-  DCHECK((check == ENABLE_INLINED_SMI_CHECK)
-         ? (*jmp_address == Assembler::kJncShortOpcode ||
-            *jmp_address == Assembler::kJcShortOpcode)
-         : (*jmp_address == Assembler::kJnzShortOpcode ||
-            *jmp_address == Assembler::kJzShortOpcode));
-  Condition cc = (check == ENABLE_INLINED_SMI_CHECK)
-      ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
-      : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
-  *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
-}
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_TARGET_ARCH_X64