[interpreter] Add output register to ToName

src/interpreter/bytecode-pipeline.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_BYTECODE_PIPELINE_H_
 #define V8_INTERPRETER_BYTECODE_PIPELINE_H_
 
 #include "src/interpreter/bytecode-register-allocator.h"
 #include "src/interpreter/bytecode-register.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 135 matching lines @@
   BytecodeNode(Bytecode bytecode, uint32_t operand0);
   BytecodeNode(Bytecode bytecode, uint32_t operand0, uint32_t operand1);
   BytecodeNode(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
                uint32_t operand2);
   BytecodeNode(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
                uint32_t operand2, uint32_t operand3);
 
   BytecodeNode(const BytecodeNode& other);
   BytecodeNode& operator=(const BytecodeNode& other);
 
+  // Replace the bytecode of this node with |bytecode| and keep the operands.
+  void replace_bytecode(Bytecode bytecode) {
+    DCHECK_EQ(Bytecodes::NumberOfOperands(bytecode_),
+              Bytecodes::NumberOfOperands(bytecode));
+    bytecode_ = bytecode;
+  }
   void set_bytecode(Bytecode bytecode) {
     DCHECK_EQ(Bytecodes::NumberOfOperands(bytecode), 0);
     bytecode_ = bytecode;
   }
   void set_bytecode(Bytecode bytecode, uint32_t operand0) {
     DCHECK_EQ(Bytecodes::NumberOfOperands(bytecode), 1);
     bytecode_ = bytecode;
     operands_[0] = operand0;
   }
   void set_bytecode(Bytecode bytecode, uint32_t operand0, uint32_t operand1) {
@@ skipping 39 matching lines @@
 };
 
 std::ostream& operator<<(std::ostream& os, const BytecodeSourceInfo& info);
 std::ostream& operator<<(std::ostream& os, const BytecodeNode& node);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_PIPELINE_H_