Fix debug tracing of live ranges and remove unused code....

src/lithium-allocator.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 268 matching lines @@
   static const int kInvalidAssignment = 0x7fffffff;
 
   explicit LiveRange(int id);
 
   UseInterval* first_interval() const { return first_interval_; }
   UsePosition* first_pos() const { return first_pos_; }
   LiveRange* parent() const { return parent_; }
   LiveRange* TopLevel() { return (parent_ == NULL) ? this : parent_; }
   LiveRange* next() const { return next_; }
   bool IsChild() const { return parent() != NULL; }
-  bool IsParent() const { return parent() == NULL; }
   int id() const { return id_; }
   bool IsFixed() const { return id_ < 0; }
   bool IsEmpty() const { return first_interval() == NULL; }
   LOperand* CreateAssignedOperand();
   int assigned_register() const { return assigned_register_; }
   int spill_start_index() const { return spill_start_index_; }
   void set_assigned_register(int reg, RegisterKind register_kind);
   void MakeSpilled();
 
   // Returns use position in this live range that follows both start
@@ skipping 53 matching lines @@
 
   bool ShouldBeAllocatedBefore(const LiveRange* other) const;
   bool CanCover(LifetimePosition position) const;
   bool Covers(LifetimePosition position);
   LifetimePosition FirstIntersection(LiveRange* other);
 
   // Add a new interval or a new use position to this live range.
   void EnsureInterval(LifetimePosition start, LifetimePosition end);
   void AddUseInterval(LifetimePosition start, LifetimePosition end);
   UsePosition* AddUsePosition(LifetimePosition pos, LOperand* operand);
-  UsePosition* AddUsePosition(LifetimePosition pos);
 
   // Shorten the most recently added interval by setting a new start.
   void ShortenTo(LifetimePosition start);
 
 #ifdef DEBUG
   // True if target overlaps an existing interval.
   bool HasOverlap(UseInterval* target) const;
   void Verify() const;
 #endif
 
@@ skipping 263 matching lines @@
 
   bool has_osr_entry_;
 
   DISALLOW_COPY_AND_ASSIGN(LAllocator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_ALLOCATOR_H_