llvm-extract (1) Linux Manual Page
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).