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

src/lithium-allocator.cc

 // 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 460 matching lines @@
     if (use_pos->HasOperand()) {
       ASSERT(op->IsRegister() || op->IsDoubleRegister() ||
              !use_pos->RequiresRegister());
       use_pos->operand()->ConvertTo(op->kind(), op->index());
     }
     use_pos = use_pos->next();
   }
 }
 
 
-UsePosition* LiveRange::AddUsePosition(LifetimePosition pos) {
-  return AddUsePosition(pos, CreateAssignedOperand());
-}
-
-
 bool LiveRange::CanCover(LifetimePosition position) const {
   if (IsEmpty()) return false;
   return Start().Value() <= position.Value() &&
          position.Value() < End().Value();
 }
 
 
 bool LiveRange::Covers(LifetimePosition position) {
   if (!CanCover(position)) return false;
   UseInterval* start_search = FirstSearchIntervalForPosition(position);
@@ skipping 1593 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal