Reland [heap] Avoid the use of cells to point from code to new-space objects.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1407 matching lines @@
 void MacroAssembler::LoadTrueFalseRoots(Register true_root,
                                         Register false_root) {
   STATIC_ASSERT((Heap::kTrueValueRootIndex + 1) == Heap::kFalseValueRootIndex);
   Ldp(true_root, false_root,
       MemOperand(root, Heap::kTrueValueRootIndex << kPointerSizeLog2));
 }
 
 
 void MacroAssembler::LoadHeapObject(Register result,
                                     Handle<HeapObject> object) {
-  AllowDeferredHandleDereference using_raw_address;
-  if (isolate()->heap()->InNewSpace(*object)) {
-    Handle<Cell> cell = isolate()->factory()->NewCell(object);
-    Mov(result, Operand(cell));
-    Ldr(result, FieldMemOperand(result, Cell::kValueOffset));
-  } else {
-    Mov(result, Operand(object));
-  }
+  Mov(result, Operand(object));
 }
 
 
 void MacroAssembler::LoadInstanceDescriptors(Register map,
                                              Register descriptors) {
   Ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset));
 }
 
 
 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
@@ skipping 3698 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64