Allow specifying base offset when constructing Keyed hydrogen instructions

src/arm64/lithium-codegen-arm64.h

 // 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.
 
 #ifndef V8_ARM64_LITHIUM_CODEGEN_ARM64_H_
 #define V8_ARM64_LITHIUM_CODEGEN_ARM64_H_
 
 #include "arm64/lithium-arm64.h"
 
 #include "arm64/lithium-gap-resolver-arm64.h"
@@ skipping 237 matching lines @@
   void DeoptimizeIfBitSet(Register rt, int bit, LEnvironment* environment);
   void DeoptimizeIfBitClear(Register rt, int bit, LEnvironment* environment);
 
   MemOperand PrepareKeyedExternalArrayOperand(Register key,
                                               Register base,
                                               Register scratch,
                                               bool key_is_smi,
                                               bool key_is_constant,
                                               int constant_key,
                                               ElementsKind elements_kind,
-                                              int additional_index);
+                                              int base_offset);
   MemOperand PrepareKeyedArrayOperand(Register base,
                                       Register elements,
                                       Register key,
                                       bool key_is_tagged,
                                       ElementsKind elements_kind,
                                       Representation representation,
-                                      int additional_index);
+                                      int base_offset);
 
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
 
   int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
 
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
@@ skipping 221 matching lines @@
 
  protected:
   MacroAssembler* masm() const { return codegen_->masm(); }
 
   LCodeGen* codegen_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_LITHIUM_CODEGEN_ARM64_H_