Make stackmaps store their actual length.

runtime/vm/bitmap.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_BITMAP_H_
 #define VM_BITMAP_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
@@ skipping 23 matching lines @@
 
   // Return the bit offset of the highest bit set.
   intptr_t Maximum() const;
 
   // Return the bit offset of the lowest bit set.
   intptr_t Minimum() const;
 
   // Sets min..max (inclusive) to value.
   void SetRange(intptr_t min, intptr_t max, bool value);
 
-  // Replicates the bit map setting of the passed in Stackmap object.
-  void SetBits(const Stackmap& stackmap);

[Kevin Millikin (Google), 2012/08/17 09:07:43]

This function is unused and doesn't seem useful at the moment.

-
  private:
   static const intptr_t kInitialSizeInBytes = 16;
   static const intptr_t kIncrementSizeInBytes = 16;
 
   bool InRange(intptr_t offset) const {
     return (offset >= 0) && (offset < SizeInBits());
   }
 
   bool GetBit(intptr_t bit_offset) const;
   void SetBit(intptr_t bit_offset, bool value);
 
   intptr_t size_in_bytes_;
   uint8_t bit_list_data_[kInitialSizeInBytes];
   uint8_t* bit_list_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapBuilder);
 };
 
 }  // namespace dart
 
 #endif  // VM_BITMAP_H_