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86 lines
2.3 KiB
Plaintext
86 lines
2.3 KiB
Plaintext
=pod
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=head1 NAME
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llvm-extract - extract a function from an LLVM module
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=head1 SYNOPSIS
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B<llvm-extract> [I<options>] B<--func> I<function-name> [I<filename>]
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=head1 DESCRIPTION
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The B<llvm-extract> command takes the name of a function and extracts it from
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the specified LLVM bitcode file. It is primarily used as a debugging tool to
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reduce test cases from larger programs that are triggering a bug.
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In addition to extracting the bitcode of the specified function,
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B<llvm-extract> will also remove unreachable global variables, prototypes, and
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unused types.
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The B<llvm-extract> command reads its input from standard input if filename is
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omitted or if filename is -. The output is always written to standard output,
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unless the B<-o> option is specified (see below).
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=head1 OPTIONS
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=over
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=item B<-f>
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Enable binary output on terminals. Normally, B<llvm-extract> will refuse to
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write raw bitcode output if the output stream is a terminal. With this option,
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B<llvm-extract> will write raw bitcode regardless of the output device.
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=item B<--func> I<function-name>
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Extract the function named I<function-name> from the LLVM bitcode. May be
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specified multiple times to extract multiple functions at once.
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=item B<--rfunc> I<function-regular-expr>
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Extract the function(s) matching I<function-regular-expr> from the LLVM bitcode.
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All functions matching the regular expression will be extracted. May be
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specified multiple times.
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=item B<--glob> I<global-name>
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Extract the global variable named I<global-name> from the LLVM bitcode. May be
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specified multiple times to extract multiple global variables at once.
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=item B<--rglob> I<glob-regular-expr>
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Extract the global variable(s) matching I<global-regular-expr> from the LLVM
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bitcode. All global variables matching the regular expression will be extracted.
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May be specified multiple times.
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=item B<-help>
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Print a summary of command line options.
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=item B<-o> I<filename>
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Specify the output filename. If filename is "-" (the default), then
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B<llvm-extract> sends its output to standard output.
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=item B<-S>
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Write output in LLVM intermediate language (instead of bitcode).
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=back
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=head1 EXIT STATUS
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If B<llvm-extract> succeeds, it will exit with 0. Otherwise, if an error
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occurs, it will exit with a non-zero value.
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=head1 SEE ALSO
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L<bugpoint|bugpoint>
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=head1 AUTHORS
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Maintained by the LLVM Team (L<http://llvm.org/>).
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=cut
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