[turbofan] Some common operators are globally shared singletons.

src/compiler/raw-machine-assembler.h

 // Copyright 2014 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_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #ifdef USE_SIMULATOR
 #define MACHINE_ASSEMBLER_SUPPORTS_CALL_C 0
 #else
 #define MACHINE_ASSEMBLER_SUPPORTS_CALL_C 1
 #endif
 
 #include "src/v8.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-builder.h"
+#include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class BasicBlock;
@@ skipping 421 matching lines @@
   BasicBlock* current_block_;
 
   DISALLOW_COPY_AND_ASSIGN(RawMachineAssembler);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_