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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39990 91177308-0d34-0410-b5e6-96231b3b80d8
135 lines
4.2 KiB
Plaintext
135 lines
4.2 KiB
Plaintext
=pod
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=head1 NAME
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bugpoint - automatic test case reduction tool
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=head1 SYNOPSIS
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B<bugpoint> [I<options>] [I<input LLVM ll/bc files>] [I<LLVM passes>] B<--args>
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I<program arguments>
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=head1 DESCRIPTION
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B<bugpoint> narrows down the source of problems in LLVM tools and passes. It
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can be used to debug three types of failures: optimizer crashes, miscompilations
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by optimizers, or bad native code generation (including problems in the static
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and JIT compilers). It aims to reduce large test cases to small, useful ones.
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For more information on the design and inner workings of B<bugpoint>, as well as
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advice for using bugpoint, see F<llvm/docs/Bugpoint.html> in the LLVM
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distribution.
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=head1 OPTIONS
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=over
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=item B<--additional-so> F<library>
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Load the dynamic shared object F<library> into the test program whenever it is
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run. This is useful if you are debugging programs which depend on non-LLVM
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libraries (such as the X or curses libraries) to run.
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=item B<--args> I<program args>
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Pass all arguments specified after -args to the test program whenever it runs.
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Note that if any of the I<program args> start with a '-', you should use:
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bugpoint [bugpoint args] --args -- [program args]
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The "--" right after the B<--args> option tells B<bugpoint> to consider any
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options starting with C<-> to be part of the B<--args> option, not as options to
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B<bugpoint> itself.
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=item B<--tool-args> I<tool args>
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Pass all arguments specified after --tool-args to the LLVM tool under test
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(B<llc>, B<lli>, etc.) whenever it runs. You should use this option in the
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following way:
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bugpoint [bugpoint args] --tool-args -- [tool args]
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The "--" right after the B<--tool-args> option tells B<bugpoint> to consider any
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options starting with C<-> to be part of the B<--tool-args> option, not as
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options to B<bugpoint> itself. (See B<--args>, above.)
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=item B<--check-exit-code>=I<{true,false}>
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Assume a non-zero exit code or core dump from the test program is a failure.
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Defaults to true.
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=item B<--disable-{dce,simplifycfg}>
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Do not run the specified passes to clean up and reduce the size of the test
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program. By default, B<bugpoint> uses these passes internally when attempting to
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reduce test programs. If you're trying to find a bug in one of these passes,
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B<bugpoint> may crash.
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=item B<--enable-valgrind>
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Use valgrind to find faults in the optimization phase. This will allow
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bugpoint to find otherwise asymptomatic problems caused by memory
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mis-management.
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=item B<-find-bugs>
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Continually randomize the specified passes and run them on the test program
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until a bug is found or the user kills B<bugpoint>.
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=item B<--help>
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Print a summary of command line options.
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=item B<--input> F<filename>
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Open F<filename> and redirect the standard input of the test program, whenever
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it runs, to come from that file.
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=item B<--load> F<plugin>
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Load the dynamic object F<plugin> into B<bugpoint> itself. This object should
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register new optimization passes. Once loaded, the object will add new command
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line options to enable various optimizations. To see the new complete list of
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optimizations, use the B<--help> and B<--load> options together; for example:
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bugpoint --load myNewPass.so --help
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=item B<--mlimit> F<megabytes>
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Specifies an upper limit on memory usage of the optimization and codegen. Set
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to zero to disable the limit.
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=item B<--output> F<filename>
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Whenever the test program produces output on its standard output stream, it
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should match the contents of F<filename> (the "reference output"). If you
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do not use this option, B<bugpoint> will attempt to generate a reference output
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by compiling the program with the C backend and running it.
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=item B<--profile-info-file> F<filename>
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Profile file loaded by B<--profile-loader>.
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=item B<--run-{int,jit,llc,cbe}>
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Whenever the test program is compiled, B<bugpoint> should generate code for it
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using the specified code generator. These options allow you to choose the
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interpreter, the JIT compiler, the static native code compiler, or the C
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backend, respectively.
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=back
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=head1 EXIT STATUS
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If B<bugpoint> succeeds in finding a problem, it will exit with 0. Otherwise,
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if an error occurs, it will exit with a non-zero value.
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=head1 SEE ALSO
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L<opt|opt>
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=head1 AUTHOR
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Maintained by the LLVM Team (L<http://llvm.org>).
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=cut
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