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This is something that I have found to be very useful in my work and I wanted to contribute it back to the community since several people in the past have asked me for something along these lines. (Jakob, I know this has been a while coming ; )] The way you use this is you create a script that takes in as its first argument a count. The script passes into LLVM the count via a command line flag that disables a pass after LLVM has run after the pass has run for count number of times. Then the script invokes a test of some sort and indicates whether LLVM successfully compiled the test via the scripts exit status. Then you invoke bisect as follows: bisect --start=<start_num> --end=<end_num> ./script.sh "%(count)s" And bisect will continually call ./script.sh with various counts using the exit status to determine success and failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214610 91177308-0d34-0410-b5e6-96231b3b80d8
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