[x64] Compare handles instead of code targets in emit_code_target.

src/x64/assembler-x64-inl.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_ASSEMBLER_X64_INL_H_
 #define V8_X64_ASSEMBLER_X64_INL_H_
 
 #include "src/x64/assembler-x64.h"
 
 #include "src/base/cpu.h"
@@ skipping 47 matching lines @@
                                  RelocInfo::Mode rmode,
                                  TypeFeedbackId ast_id) {
   DCHECK(RelocInfo::IsCodeTarget(rmode) ||
       rmode == RelocInfo::CODE_AGE_SEQUENCE);
   if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) {
     RecordRelocInfo(RelocInfo::CODE_TARGET_WITH_ID, ast_id.ToInt());
   } else {
     RecordRelocInfo(rmode);
   }
   int current = code_targets_.length();
-  if (current > 0 && code_targets_.last().is_identical_to(target)) {
+  if (current > 0 && code_targets_.last().address() == target.address()) {
     // Optimization if we keep jumping to the same code target.
     emitl(current - 1);
   } else {
     code_targets_.Add(target);
     emitl(current);
   }
 }
 
 
 void Assembler::emit_runtime_entry(Address entry, RelocInfo::Mode rmode) {
@@ skipping 530 matching lines @@
 void Operand::set_disp64(int64_t disp) {
   DCHECK_EQ(1, len_);
   int64_t* p = reinterpret_cast<int64_t*>(&buf_[len_]);
   *p = disp;
   len_ += sizeof(disp);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_ASSEMBLER_X64_INL_H_