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653d361880
The original commit was reverted because of a buildbot problem with LazyCallGraph::SCC handling (not related to the OptBisect handling). Differential Revision: http://reviews.llvm.org/D19172 llvm-svn: 267231
40 lines
1.2 KiB
Python
Executable File
40 lines
1.2 KiB
Python
Executable File
#!/usr/bin/env python
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import os
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import sys
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import argparse
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import subprocess
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parser = argparse.ArgumentParser()
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parser.add_argument('--start', type=int, default=0)
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parser.add_argument('--end', type=int, default=(1 << 32))
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parser.add_argument('--optcmd', default=("opt"))
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parser.add_argument('--filecheckcmd', default=("FileCheck"))
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parser.add_argument('--prefix', default=("CHECK-BISECT"))
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parser.add_argument('--test', default=(""))
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args = parser.parse_args()
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start = args.start
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end = args.end
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opt_command = [args.optcmd, "-O2", "-opt-bisect-limit=%(count)s", "-S", args.test]
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check_command = [args.filecheckcmd, args.test, "--check-prefix=%s" % args.prefix]
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last = None
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while start != end and start != end-1:
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count = int(round(start + (end - start)/2))
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cmd = [x % {'count':count} for x in opt_command]
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print("opt: " + str(cmd))
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opt_result = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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filecheck_result = subprocess.Popen(check_command, stdin=opt_result.stdout)
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opt_result.stdout.close()
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opt_result.stderr.close()
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filecheck_result.wait()
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if filecheck_result.returncode == 0:
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start = count
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else:
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end = count
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print("Last good count: %d" % start)
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