llvm-mirror/utils/DSAclean.py

#! /usr/bin/python

#changelog: 
#10/13/2005b: replaced the # in tmp(.#*)* with alphanumeric and _, this will then remove
#nodes such as %tmp.1.i and %tmp._i.3
#10/13/2005: exntended to remove variables of the form %tmp(.#)* rather than just 
#%tmp.#, i.e. it now will remove %tmp.12.3.15 etc, additionally fixed a spelling error in
#the comments
#10/12/2005: now it only removes nodes and edges for which the label is %tmp.# rather
#than removing all lines for which the lable CONTAINS %tmp.#

from __future__ import print_function

import re
import sys
if( len(sys.argv) < 3 ):
	print('usage is: ./DSAclean <dot_file_to_be_cleaned> <out_put_file>')
	sys.exit(1)
#get a file object
input = open(sys.argv[1], 'r')
output = open(sys.argv[2], 'w')
#we'll get this one line at a time...while we could just put the whole thing in a string
#it would kill old computers
buffer = input.readline()
while buffer != '':
	if re.compile("label(\s*)=(\s*)\"\s%tmp(.\w*)*(\s*)\"").search(buffer):
		#skip next line, write neither this line nor the next
		buffer = input.readline()
	else:
		#this isn't a tmp Node, we can write it
		output.write(buffer)
	#prepare for the next iteration
	buffer = input.readline()
input.close()
output.close()