text: #!/usr/bin/env python
  #===- lib/fuzzer/scripts/merge_data_flow.py ------------------------------===#
  #
  #                     The LLVM Compiler Infrastructure
  #
  # This file is distributed under the University of Illinois Open Source
  # License. See LICENSE.TXT for details.
  #
  #===------------------------------------------------------------------------===#
  # Merge several data flow traces into one.
  # Usage:
  #   merge_data_flow.py trace1 trace2 ...  > result
  #===------------------------------------------------------------------------===#
  import sys
  import fileinput
  from array import array
  
  def Merge(a, b):
    res = array('b')
    for i in range(0, len(a)):
      res.append(ord('1' if a[i] == '1' or b[i] == '1' else '0'))
    return res.tostring()
  
  def main(argv):
    D = {}
    for line in fileinput.input():
      [F,BV] = line.strip().split(' ')
      if F in D:
        D[F] = Merge(D[F], BV)
      else:
        D[F] = BV;
    for F in D.keys():
      print("%s %s" % (F, D[F]))
  
  if __name__ == '__main__':
    main(sys.argv)
  