Fix register hinting for phis.

runtime/vm/flow_graph_allocator.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLOW_GRAPH_ALLOCATOR_H_
 #define VM_FLOW_GRAPH_ALLOCATOR_H_
 
 #include "vm/flow_graph.h"
 #include "vm/growable_array.h"
 #include "vm/intermediate_language.h"
@@ skipping 547 matching lines @@
   static LiveRange* MakeTemp(intptr_t pos, Location* location_slot);
 
   intptr_t vreg() const { return vreg_; }
   Representation representation() const { return representation_; }
   LiveRange* next_sibling() const { return next_sibling_; }
   UsePosition* first_use() const { return uses_; }
   void set_first_use(UsePosition* use) { uses_ = use; }
   UseInterval* first_use_interval() const { return first_use_interval_; }
   UseInterval* last_use_interval() const { return last_use_interval_; }
   Location assigned_location() const { return assigned_location_; }
+  Location* assigned_location_slot() { return &assigned_location_; }
   intptr_t Start() const { return first_use_interval()->start(); }
   intptr_t End() const { return last_use_interval()->end(); }
 
   SafepointPosition* first_safepoint() const { return first_safepoint_; }
 
   AllocationFinger* finger() { return &finger_; }
 
   void set_assigned_location(Location location) {
     assigned_location_ = location;
   }
@@ skipping 91 matching lines @@
 
   AllocationFinger finger_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveRange);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_ALLOCATOR_H_