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