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#!/usr/bin/env python
# Given a -print-before-all and/or -print-after-all -print-module-scope log from
# an opt invocation, chunk it into a series of individual IR files, one for each
# pass invocation. If the log ends with an obvious stack trace, try to split off
# a separate "crashinfo.txt" file leaving only the valid input IR in the last
# chunk. Files are written to current working directory.
import sys
import re
chunk_id = 0
# This function gets the pass name from the following line:
# *** IR Dump Before/After PASS_NAME... ***
def get_pass_name(line, prefix):
short_line = line[line.find(prefix) + len(prefix) + 1:]
return re.split(' |<', short_line)[0]
def print_chunk(lines, prefix, pass_name):
global chunk_id
fname = str(chunk_id) + "-" + prefix + "-" + pass_name + ".ll"
chunk_id = chunk_id + 1
print("writing chunk " + fname + " (" + str(len(lines)) + " lines)")
with open(fname, "w") as f:
f.writelines(lines)
is_dump = False
cur = []
for line in sys.stdin:
if line.startswith("*** IR Dump Before "):
if len(cur) != 0:
print_chunk(cur, "before", pass_name)
cur = []
cur.append("; " + line)
pass_name = get_pass_name(line, "Before")
elif line.startswith("*** IR Dump After "):
if len(cur) != 0:
print_chunk(cur, "after", pass_name)
cur = []
cur.append("; " + line)
pass_name = get_pass_name(line, "After")
elif line.startswith("Stack dump:"):
print_chunk(cur, "crash", pass_name)
cur = []
cur.append(line)
is_dump = True
else:
cur.append(line)
if is_dump:
print("writing crashinfo.txt (" + str(len(cur)) + " lines)")
with open("crashinfo.txt", "w") as f:
f.writelines(cur)
else:
print_chunk(cur, "last", pass_name)
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