Mark that the return is using EAX so that we don't use it for some other
[llvm.git] / utils / DSAextract.py
blob134e9453fbb5df0277159bf310c23aaa42c9d744
1 #! /usr/bin/python
3 #this is a script to extract given named nodes from a dot file, with
4 #the associated edges. An edge is kept iff for edge x -> y
5 # x and y are both nodes specified to be kept.
7 #known issues: if a line contains '->' and is not an edge line
8 #problems will occur. If node labels do not begin with
9 #Node this also will not work. Since this is designed to work
10 #on DSA dot output and not general dot files this is ok.
11 #If you want to use this on other files rename the node labels
12 #to Node[.*] with a script or something. This also relies on
13 #the length of a node name being 13 characters (as it is in all
14 #DSA dot output files)
16 #Note that the name of the node can be any substring of the actual
17 #name in the dot file. Thus if you say specify COLLAPSED
18 #as a parameter this script will pull out all COLLAPSED
19 #nodes in the file
21 #Specifying escape characters in the name like \n also will not work,
22 #as Python
23 #will make it \\n, I'm not really sure how to fix this
25 #currently the script prints the names it is searching for
26 #to STDOUT, so you can check to see if they are what you intend
28 import re
29 import string
30 import sys
33 if len(sys.argv) < 3:
34 print 'usage is ./DSAextract <dot_file_to_modify> \
35 <output_file> [list of nodes to extract]'
37 #open the input file
38 input = open(sys.argv[1], 'r')
40 #construct a set of node names
41 node_name_set = set()
42 for name in sys.argv[3:]:
43 node_name_set |= set([name])
45 #construct a list of compiled regular expressions from the
46 #node_name_set
47 regexp_list = []
48 for name in node_name_set:
49 regexp_list.append(re.compile(name))
51 #used to see what kind of line we are on
52 nodeexp = re.compile('Node')
53 #used to check to see if the current line is an edge line
54 arrowexp = re.compile('->')
56 node_set = set()
58 #read the file one line at a time
59 buffer = input.readline()
60 while buffer != '':
61 #filter out the unecessary checks on all the edge lines
62 if not arrowexp.search(buffer):
63 #check to see if this is a node we are looking for
64 for regexp in regexp_list:
65 #if this name is for the current node, add the dot variable name
66 #for the node (it will be Node(hex number)) to our set of nodes
67 if regexp.search(buffer):
68 node_set |= set([re.split('\s+',buffer,2)[1]])
69 break
70 buffer = input.readline()
73 #test code
74 #print '\n'
76 print node_name_set
78 #print node_set
81 #open the output file
82 output = open(sys.argv[2], 'w')
83 #start the second pass over the file
84 input = open(sys.argv[1], 'r')
86 buffer = input.readline()
87 while buffer != '':
88 #there are three types of lines we are looking for
89 #1) node lines, 2) edge lines 3) support lines (like page size, etc)
91 #is this an edge line?
92 #note that this is no completely robust, if a none edge line
93 #for some reason contains -> it will be missidentified
94 #hand edit the file if this happens
95 if arrowexp.search(buffer):
96 #check to make sure that both nodes are in the node list
97 #if they are print this to output
98 nodes = arrowexp.split(buffer)
99 nodes[0] = string.strip(nodes[0])
100 nodes[1] = string.strip(nodes[1])
101 if nodes[0][:13] in node_set and \
102 nodes[1][:13] in node_set:
103 output.write(buffer)
104 elif nodeexp.search(buffer): #this is a node line
105 node = re.split('\s+', buffer,2)[1]
106 if node in node_set:
107 output.write(buffer)
108 else: #this is a support line
109 output.write(buffer)
110 buffer = input.readline()