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