[turbofan] Make MachineType a pair of enums.

test/unittests/compiler/escape-analysis-unittest.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/bit-vector.h"
 #include "src/compiler/escape-analysis.h"
 #include "src/compiler/escape-analysis-reducer.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
@@ skipping 115 matching lines @@
   }
 
   Node* IfFalse() { return graph()->NewNode(common()->IfFalse(), control_); }
 
   Node* Merge2(Node* control1, Node* control2) {
     return control_ = graph()->NewNode(common()->Merge(2), control1, control2);
   }
 
   FieldAccess AccessAtIndex(int offset) {
     FieldAccess access = {kTaggedBase, offset, MaybeHandle<Name>(), Type::Any(),
-                          kMachAnyTagged};
+                          MachineType::AnyTagged()};
     return access;
   }
 
   // ---------------------------------Assertion Helper--------------------------
 
   void ExpectReplacement(Node* node, Node* rep) {
     EXPECT_EQ(rep, escape_analysis()->GetReplacement(node, node->id()));
   }
 
   void ExpectReplacementPhi(Node* node, Node* left, Node* right) {
@@ skipping 149 matching lines @@
   ExpectReplacement(load2, object1);
 
   Transformation();
 
   ASSERT_EQ(object1, NodeProperties::GetValueInput(result, 0));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8