[turbofan] Initial version of ValueNumberingReducer.

src/compiler/machine-operator.h

 // Copyright 2013 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_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/compiler/machine-type.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // TODO(turbofan): other write barriers are possible based on type
 enum WriteBarrierKind { kNoWriteBarrier, kFullWriteBarrier };
 
 
 // A Store needs a MachineType and a WriteBarrierKind
 // in order to emit the correct write barrier.
 struct StoreRepresentation {
   MachineType machine_type;
   WriteBarrierKind write_barrier_kind;
 };
 
 
+// TODO(bmeurer): Phi will probably also need this in the future.
+template <>
+struct StaticParameterTraits<MachineType> {
+  static OStream& PrintTo(OStream& os, MachineType type) {  // NOLINT
+    return os << type;
+  }
+  static int HashCode(MachineType type) { return type; }
+  static bool Equals(MachineType lhs, MachineType rhs) { return lhs == rhs; }
+};
+
+
 // Interface for building machine-level operators. These operators are
 // machine-level but machine-independent and thus define a language suitable
 // for generating code to run on architectures such as ia32, x64, arm, etc.
 class MachineOperatorBuilder {
  public:
   explicit MachineOperatorBuilder(Zone* zone, MachineType word = kMachPtr)
       : zone_(zone), word_(word) {
     CHECK(word == kRepWord32 || word == kRepWord64);
   }
 
@@ skipping 132 matching lines @@
 
  private:
   Zone* zone_;
   MachineType word_;
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_