[turbofan] Make MachineType a pair of enums.

src/compiler/state-values-utils.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/compiler/state-values-utils.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 253 matching lines @@
 
 
 Node* StateValuesAccess::iterator::node() {
   return Top()->node->InputAt(Top()->index);
 }
 
 
 MachineType StateValuesAccess::iterator::type() {
   Node* state = Top()->node;
   if (state->opcode() == IrOpcode::kStateValues) {
-    return kMachAnyTagged;
+    return MachineType::AnyTagged();
   } else {
     DCHECK_EQ(IrOpcode::kTypedStateValues, state->opcode());
     const ZoneVector<MachineType>* types =
         OpParameter<const ZoneVector<MachineType>*>(state);
     return (*types)[Top()->index];
   }
 }
 
 
 bool StateValuesAccess::iterator::operator!=(iterator& other) {
@@ skipping 23 matching lines @@
     } else {
       count++;
     }
   }
   return count;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8