


LLVM-EXTRACT(1)         LLVM Command Guide        LLVM-EXTRACT(1)


NAME
       llvm-extract - extract a function from an LLVM module

SYNOPSIS
       llvm-extract [options] --func function-name [filename]

DESCRIPTION
       The llvm-extract command takes the name of a function and extracts it
       from the specified LLVM bitcode file.  It is primarily used as a
       debugging tool to reduce test cases from larger programs that are
       triggering a bug.

       In addition to extracting the bitcode of the specified function, llvm-
       extract will also remove unreachable global variables, prototypes, and
       unused types.

       The llvm-extract command reads its input from standard input if
       filename is omitted or if filename is -.  The output is always written
       to standard output, unless the -o option is specified (see below).

OPTIONS
       -f  Enable binary output on terminals.  Normally, llvm-extract will
           refuse to write raw bitcode output if the output stream is a
           terminal. With this option, llvm-extract will write raw bitcode
           regardless of the output device.

       --func function-name
           Extract the function named function-name from the LLVM bitcode. May
           be specified multiple times to extract multiple functions at once.

       --glob global-name
           Extract the global variable named global-name from the LLVM
           bitcode. May be specified multiple times to extract multiple global
           variables at once.

       -help
           Print a summary of command line options.

       -o filename
           Specify the output filename.  If filename is "-" (the default),
           then llvm-extract sends its output to standard output.

       -S  Write output in LLVM intermediate language (instead of bitcode).

EXIT STATUS
       If llvm-extract succeeds, it will exit with 0.  Otherwise, if an error
       occurs, it will exit with a non-zero value.

SEE ALSO
       bugpoint

AUTHORS
       Maintained by the LLVM Team (<http://llvm.org>).




CVS                         2010-05-06                          1


