[turbofan] Pick word representation for phis with Type::Internal().

src/compiler/simplified-lowering.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/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 326 matching lines @@
         return kRepWord32;
       } else {
         return kRepFloat64;
       }
     } else if (upper->Is(Type::Boolean())) {
       // multiple uses => pick kRepBit.
       return kRepBit;
     } else if (upper->Is(Type::Number())) {
       // multiple uses => pick kRepFloat64.
       return kRepFloat64;
+    } else if (upper->Is(Type::Internal())) {
+      return kMachPtr;
     }
     return kRepTagged;
   }
 
   // Helper for handling selects.
   void VisitSelect(Node* node, MachineTypeUnion use,
                    SimplifiedLowering* lowering) {
     ProcessInput(node, 0, kRepBit);
     MachineType output = GetRepresentationForPhi(node, use);
 
@@ skipping 1254 matching lines @@
 
 void SimplifiedLowering::DoStringLessThanOrEqual(Node* node) {
   node->set_op(machine()->IntLessThanOrEqual());
   node->ReplaceInput(0, StringComparison(node, true));
   node->ReplaceInput(1, jsgraph()->SmiConstant(EQUAL));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8