[turbofan] Make MachineType a pair of enums.

test/unittests/compiler/live-range-builder.h

 // 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.
 
 #ifndef V8_LIVE_RANGE_BUILDER_H_
 #define V8_LIVE_RANGE_BUILDER_H_
 
 #include "src/compiler/register-allocator.h"
 
 namespace v8 {
@@ skipping 22 matching lines @@
     uses_.insert(pos);
     return *this;
   }
 
   TopLevelLiveRange* Build(int start, int end) {
     return Add(start, end).Build();
   }
 
   TopLevelLiveRange* Build() {
     TopLevelLiveRange* range =
-        new (zone_) TopLevelLiveRange(id_, MachineType::kRepTagged);
+        new (zone_) TopLevelLiveRange(id_, MachineRepresentation::kTagged);
     // Traverse the provided interval specifications backwards, because that is
     // what LiveRange expects.
     for (int i = static_cast<int>(pairs_.size()) - 1; i >= 0; --i) {
       Interval pair = pairs_[i];
       LifetimePosition start = LifetimePosition::FromInt(pair.first);
       LifetimePosition end = LifetimePosition::FromInt(pair.second);
       CHECK(start < end);
       range->AddUseInterval(start, end, zone_);
     }
     for (int pos : uses_) {
@@ skipping 15 matching lines @@
   std::set<int> uses_;
   Zone* zone_;
 };
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_LIVE_RANGE_BUILDER_H_