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

src/x64/macro-assembler-x64.h

 // 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.
 
 #ifndef V8_X64_MACRO_ASSEMBLER_X64_H_
 #define V8_X64_MACRO_ASSEMBLER_X64_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/base/flags.h"
@@ skipping 909 matching lines @@
     // This method must not be used with heap object references. The stored
     // address is not GC safe. Use the handle version instead.
     DCHECK(rmode > RelocInfo::LAST_GCED_ENUM);
     movp(dst, ptr, rmode);
   }
 
   void Move(Register dst, Handle<Object> value, RelocInfo::Mode rmode) {
     AllowDeferredHandleDereference using_raw_address;
     DCHECK(!RelocInfo::IsNone(rmode));
     DCHECK(value->IsHeapObject());
-    DCHECK(!isolate()->heap()->InNewSpace(*value));
     movp(dst, reinterpret_cast<void*>(value.location()), rmode);
   }
 
   void Move(XMMRegister dst, uint32_t src);
   void Move(XMMRegister dst, uint64_t src);
   void Move(XMMRegister dst, float src) { Move(dst, bit_cast<uint32_t>(src)); }
   void Move(XMMRegister dst, double src) { Move(dst, bit_cast<uint64_t>(src)); }
 
 #define AVX_OP2_WITH_TYPE(macro_name, name, src_type) \
   void macro_name(XMMRegister dst, src_type src) {    \
@@ skipping 833 matching lines @@
   }                                                                          \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_