[interpreter] Introduce fused bytecodes for common sequences.

src/interpreter/bytecodes.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/bytecodes.h"
 
 #include <iomanip>
 
 #include "src/frames.h"
 #include "src/interpreter/bytecode-traits.h"
@@ skipping 82 matching lines @@
       return "Byte";
     case OperandSize::kShort:
       return "Short";
     case OperandSize::kQuad:
       return "Quad";
   }
   UNREACHABLE();
   return "";
 }
 
-
-// static
-uint8_t Bytecodes::ToByte(Bytecode bytecode) {
-  DCHECK(bytecode <= Bytecode::kLast);
-  return static_cast<uint8_t>(bytecode);
-}
-
-
 // static
 Bytecode Bytecodes::FromByte(uint8_t value) {
   Bytecode bytecode = static_cast<Bytecode>(value);
   DCHECK(bytecode <= Bytecode::kLast);
   return bytecode;
 }
 
 
 // static
 Bytecode Bytecodes::GetDebugBreak(Bytecode bytecode) {
@@ skipping 816 matching lines @@
   } else {
     std::ostringstream s;
     s << "r" << index();
     return s.str();
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8