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|
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.
**--rfunc** *function-regular-expr*
Extract the function(s) matching *function-regular-expr* from the LLVM bitcode.
All functions matching the regular expression will be extracted. May be
specified multiple times.
**--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.
**--rglob** *glob-regular-expr*
Extract the global variable(s) matching *global-regular-expr* from the LLVM
bitcode. All global variables matching the regular expression will be extracted.
May be specified multiple times.
**-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|bugpoint
|
