[arm64] Bug fix in sapefoint recording.

src/arm64/lithium-codegen-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.
 
 #include "src/v8.h"
 
 #include "src/arm64/lithium-codegen-arm64.h"
 #include "src/arm64/lithium-gap-resolver-arm64.h"
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 539 matching lines @@
       masm(), kind, arguments, deopt_mode);
 
   for (int i = 0; i < operands->length(); i++) {
     LOperand* pointer = operands->at(i);
     if (pointer->IsStackSlot()) {
       safepoint.DefinePointerSlot(pointer->index(), zone());
     } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) {
       safepoint.DefinePointerRegister(ToRegister(pointer), zone());
     }
   }
-
-  if (kind & Safepoint::kWithRegisters) {
-    // Register cp always contains a pointer to the context.
-    safepoint.DefinePointerRegister(cp, zone());
-  }
 }
 
 void LCodeGen::RecordSafepoint(LPointerMap* pointers,
                                Safepoint::DeoptMode deopt_mode) {
   RecordSafepoint(pointers, Safepoint::kSimple, 0, deopt_mode);
 }
 
 
 void LCodeGen::RecordSafepoint(Safepoint::DeoptMode deopt_mode) {
   LPointerMap empty_pointers(zone());
@@ skipping 5466 matching lines @@
   Handle<ScopeInfo> scope_info = instr->scope_info();
   __ Push(scope_info);
   __ Push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 
 } }  // namespace v8::internal