[Interpreter] Remove register file register and replace with LoadParentFramePointer.

src/interpreter/interpreter-assembler.h

 // Copyright 2015 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_INTERPRETER_INTERPRETER_ASSEMBLER_H_
 #define V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_
 
 #include "src/allocation.h"
 #include "src/base/smart-pointers.h"
 #include "src/builtins.h"
@@ skipping 33 matching lines @@
 
   // Accumulator.
   compiler::Node* GetAccumulator();
   void SetAccumulator(compiler::Node* value);
 
   // Context.
   compiler::Node* GetContext();
   void SetContext(compiler::Node* value);
 
   // Loads from and stores to the interpreter register file.
-  compiler::Node* LoadRegister(int offset);
   compiler::Node* LoadRegister(Register reg);
   compiler::Node* LoadRegister(compiler::Node* reg_index);
-  compiler::Node* StoreRegister(compiler::Node* value, int offset);
   compiler::Node* StoreRegister(compiler::Node* value, Register reg);
   compiler::Node* StoreRegister(compiler::Node* value,
                                 compiler::Node* reg_index);
 
   // Returns the next consecutive register.
   compiler::Node* NextRegister(compiler::Node* reg_index);
 
   // Returns the location in memory of the register |reg_index| in the
   // interpreter register file.
   compiler::Node* RegisterLocation(compiler::Node* reg_index);
@@ skipping 77 matching lines @@
   void DispatchWide(OperandScale operand_scale);
 
   // Abort with the given bailout reason.
   void Abort(BailoutReason bailout_reason);
 
  protected:
   Bytecode bytecode() const { return bytecode_; }
   static bool TargetSupportsUnalignedAccess();
 
  private:
-  // Returns a raw pointer to start of the register file on the stack.
-  compiler::Node* RegisterFileRawPointer();
   // Returns a tagged pointer to the current function's BytecodeArray object.
   compiler::Node* BytecodeArrayTaggedPointer();
   // Returns the offset from the BytecodeArrayPointer of the current bytecode.
   compiler::Node* BytecodeOffset();
   // Returns a raw pointer to first entry in the interpreter dispatch table.
   compiler::Node* DispatchTableRawPointer();
 
   // Returns the accumulator value without checking whether bytecode
   // uses it. This is intended to be used only in dispatch and in
   // tracing as these need to bypass accumulator use validity checks.
@@ skipping 72 matching lines @@
   compiler::Node* stack_pointer_before_call_;
 
   DISALLOW_COPY_AND_ASSIGN(InterpreterAssembler);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_INTERPRETER_ASSEMBLER_H_