forked from OSchip/llvm-project
42 lines
1.2 KiB
Python
Executable File
42 lines
1.2 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
from __future__ import print_function
|
|
|
|
import os
|
|
import sys
|
|
import argparse
|
|
import subprocess
|
|
|
|
parser = argparse.ArgumentParser()
|
|
|
|
parser.add_argument('--start', type=int, default=0)
|
|
parser.add_argument('--end', type=int, default=(1 << 32))
|
|
parser.add_argument('--optcmd', default=("opt"))
|
|
parser.add_argument('--filecheckcmd', default=("FileCheck"))
|
|
parser.add_argument('--prefix', default=("CHECK-BISECT"))
|
|
parser.add_argument('--test', default=(""))
|
|
|
|
args = parser.parse_args()
|
|
|
|
start = args.start
|
|
end = args.end
|
|
|
|
opt_command = [args.optcmd, "-O2", "-opt-bisect-limit=%(count)s", "-S", args.test]
|
|
check_command = [args.filecheckcmd, args.test, "--check-prefix=%s" % args.prefix]
|
|
last = None
|
|
while start != end and start != end-1:
|
|
count = int(round(start + (end - start)/2))
|
|
cmd = [x % {'count':count} for x in opt_command]
|
|
print("opt: " + str(cmd))
|
|
opt_result = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
|
filecheck_result = subprocess.Popen(check_command, stdin=opt_result.stdout)
|
|
opt_result.stdout.close()
|
|
opt_result.stderr.close()
|
|
filecheck_result.wait()
|
|
if filecheck_result.returncode == 0:
|
|
start = count
|
|
else:
|
|
end = count
|
|
|
|
print("Last good count: %d" % start)
|