[interpreter] Add a register operand to ToNumber

src/interpreter/interpreter.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_H_
 #define V8_INTERPRETER_INTERPRETER_H_
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
 // Do not include anything from src/interpreter other than
 // src/interpreter/bytecodes.h here!
@@ skipping 61 matching lines @@
 
   // Generates code to perform the binary operation via |Generator|.
   template <class Generator>
   void DoBinaryOp(InterpreterAssembler* assembler);
 
   // Generates code to perform the binary operation via |Generator| using
   // an immediate value rather the accumulator as the rhs operand.
   template <class Generator>
   void DoBinaryOpWithImmediate(InterpreterAssembler* assembler);
 
-  // Generates code to perform the unary operation via |callable|.
-  void DoUnaryOp(Callable callable, InterpreterAssembler* assembler);
+  // Generates code to perform the unary operation via |callable| and stores
+  // the result to the accumulator or to the output register if the |bytecode|
+  // has a single output register operand.
+  void DoUnaryOp(Callable callable, InterpreterAssembler* assembler,
+                 Bytecode bytecode);
 
   // Generates code to perform the unary operation via |Generator|.
   template <class Generator>
   void DoUnaryOp(InterpreterAssembler* assembler);
 
   // Generates code to perform the comparison operation associated with
   // |compare_op|.
   void DoCompareOp(Token::Value compare_op, InterpreterAssembler* assembler);
 
   // Generates code to perform a global store via |ic|.
@@ skipping 75 matching lines @@
   v8::base::SmartArrayPointer<uintptr_t> bytecode_dispatch_counters_table_;
 
   DISALLOW_COPY_AND_ASSIGN(Interpreter);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_INTERPRETER_H_