[stubs] Optimize LoadGlobalViaContextStub and StoreGlobalViaContextStub.

src/arm64/interface-descriptors-arm64.cc

 // 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_ARM64
 
 #include "src/interface-descriptors.h"
 
@@ skipping 18 matching lines @@
 
 const Register VectorStoreICTrampolineDescriptor::SlotRegister() { return x4; }
 
 
 const Register VectorStoreICDescriptor::VectorRegister() { return x3; }
 
 
 const Register StoreTransitionDescriptor::MapRegister() { return x3; }
 
 
-const Register LoadGlobalViaContextDescriptor::DepthRegister() { return x1; }
 const Register LoadGlobalViaContextDescriptor::SlotRegister() { return x2; }
 const Register LoadGlobalViaContextDescriptor::NameRegister() { return x3; }
 
 
-const Register StoreGlobalViaContextDescriptor::DepthRegister() { return x1; }
 const Register StoreGlobalViaContextDescriptor::SlotRegister() { return x2; }
 const Register StoreGlobalViaContextDescriptor::NameRegister() { return x3; }
 const Register StoreGlobalViaContextDescriptor::ValueRegister() { return x0; }
 
 
 const Register InstanceofDescriptor::left() {
   // Object to check (instanceof lhs).
   return x11;
 }
 
@@ skipping 367 matching lines @@
       x1,  // math rounding function
       x3,  // vector slot id
       x4,  // type vector
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64