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, llvmextract 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>).