Cleanups.

runtime/vm/flow_graph_allocator.h

 // Copyright (c) 2012, 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/growable_array.h"
 #include "vm/intermediate_language.h"
 
@@ skipping 13 matching lines @@
   // Build live-in and live-out sets for each block.
   void AnalyzeLiveness();
 
  private:
   // Compute initial values for live-out, kill and live-in sets.
   void ComputeInitialSets();
 
   // Update live-out set for the given block: live-out should contain
   // all values that are live-in for block's successors.
   // Returns true if live-out set was changed.
-  bool UpdateLiveOut(BlockEntryInstr* instr);
+  bool UpdateLiveOut(const BlockEntryInstr& instr);
 
   // Update live-in set for the given block: live-in should contain
   // all values that are live-out from the block and are not defined
   // by this block.
   // Returns true if live-in set was changed.
-  bool UpdateLiveIn(BlockEntryInstr* instr);
+  bool UpdateLiveIn(const BlockEntryInstr& instr);
 
   // Perform fix-point iteration updating live-out and live-in sets
   // for blocks until they stop changing.
   void ComputeLiveInAndLiveOutSets();
 
   // Print results of liveness analysis.
   void DumpLiveness();
 
   // Visit blocks in the code generation order (reverse post order) and
   // linearly assign consequent lifetime positions to every instruction.
@@ skipping 257 matching lines @@
 
  private:
   const intptr_t vreg_;
   UseInterval* head_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_ALLOCATOR_H_