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"LLVM-EXTRACT" "1" "2021-06-07" "12" "LLVM"
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
--alias alias-name
NDENT 0.0 NDENT 3.5 Extract the alias named function-name from the LLVM bitcode. May be
specified multiple times to extract multiple alias at once.
NINDENT NINDENT --ralias alias-regular-expr
NDENT 0.0 NDENT 3.5 Extract the alias matching alias-regular-expr from the LLVM bitcode.
All alias matching the regular expression will be extracted. May be
specified multiple times.
NINDENT NINDENT --bb basic-block-specifier
NDENT 0.0 NDENT 3.5 Extract basic blocks(s) specified in basic-block-specifier. May be
specified multiple times. Each <function:bb[;bb]> specifier pair will create
a function. If multiple basic blocks are specified in one pair, the first
block in the sequence should dominate the rest.
NINDENT NINDENT --delete
NDENT 0.0 NDENT 3.5 Delete specified Globals from Module.
NINDENT NINDENT -f
NDENT 0.0 NDENT 3.5 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.
NINDENT NINDENT --func function-name
NDENT 0.0 NDENT 3.5 Extract the function named function-name from the LLVM bitcode. May be
specified multiple times to extract multiple functions at once.
NINDENT NINDENT --rfunc function-regular-expr
NDENT 0.0 NDENT 3.5 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.
NINDENT NINDENT --glob global-name
NDENT 0.0 NDENT 3.5 Extract the global variable named global-name from the LLVM bitcode. May be
specified multiple times to extract multiple global variables at once.
NINDENT NINDENT --rglob glob-regular-expr
NDENT 0.0 NDENT 3.5 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.
NINDENT NINDENT --keep-const-init
NDENT 0.0 NDENT 3.5 Preserve the values of constant globals.
NINDENT NINDENT --recursive
NDENT 0.0 NDENT 3.5 Recursively extract all called functions
NINDENT NINDENT -help
NDENT 0.0 NDENT 3.5 Print a summary of command line options.
NINDENT NINDENT -o filename
NDENT 0.0 NDENT 3.5 Specify the output filename. If filename is "-" (the default), then
llvm-extract sends its output to standard output.
NINDENT NINDENT -S
NDENT 0.0 NDENT 3.5 Write output in LLVM intermediate language (instead of bitcode).
NINDENT NINDENT 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(1)
AUTHOR
Maintained by the LLVM Team (https://llvm.org/).
COPYRIGHT
2003-2021, LLVM Project
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