[Interpreter] Optimize the Register Optimizer.

src/interpreter/bytecode-pipeline.cc

 // 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.
 
 #include "src/interpreter/bytecode-pipeline.h"
 
 #include <iomanip>
 #include "src/source-position-table.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
-BytecodeNode::BytecodeNode(const BytecodeNode& other) {
-  memcpy(this, &other, sizeof(other));
-}
-
-BytecodeNode& BytecodeNode::operator=(const BytecodeNode& other) {
-  memcpy(this, &other, sizeof(other));
-  return *this;
-}
-
-void BytecodeNode::Clone(const BytecodeNode* const other) {
-  memcpy(this, other, sizeof(*other));
-}
-
 void BytecodeNode::Print(std::ostream& os) const {
 #ifdef DEBUG
   std::ios saved_state(nullptr);
   saved_state.copyfmt(os);
   os << Bytecodes::ToString(bytecode_);
 
   for (int i = 0; i < operand_count(); ++i) {
     os << ' ' << std::setw(8) << std::setfill('0') << std::hex << operands_[i];
   }
   os.copyfmt(saved_state);
@@ skipping 32 matching lines @@
 }
 
 std::ostream& operator<<(std::ostream& os, const BytecodeNode& node) {
   node.Print(os);
   return os;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8