[turbofan] Machine operators are globally shared singletons.

src/compiler/instruction-selector.cc

 // 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.
 
 #include "src/compiler/instruction-selector.h"
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/pipeline.h"
@@ skipping 470 matching lines @@
     case IrOpcode::kHeapConstant:
     case IrOpcode::kNumberConstant:
       // TODO(turbofan): only mark non-smis as references.
       return MarkAsReference(node), VisitConstant(node);
     case IrOpcode::kCall:
       return VisitCall(node, NULL, NULL);
     case IrOpcode::kFrameState:
     case IrOpcode::kStateValues:
       return;
     case IrOpcode::kLoad: {
-      MachineType load_rep = OpParameter<MachineType>(node);
-      MarkAsRepresentation(load_rep, node);
+      LoadRepresentation rep = OpParameter<LoadRepresentation>(node);
+      MarkAsRepresentation(rep, node);
       return VisitLoad(node);
     }
     case IrOpcode::kStore:
       return VisitStore(node);
     case IrOpcode::kWord32And:
       return VisitWord32And(node);
     case IrOpcode::kWord32Or:
       return VisitWord32Or(node);
     case IrOpcode::kWord32Xor:
       return VisitWord32Xor(node);
@@ skipping 585 matching lines @@
 
 
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {}
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8