1 =pod 2 3 =head1 NAME 4 5 llvm-extract - extract a function from an LLVM module 6 7 =head1 SYNOPSIS 8 9 B<llvm-extract> [I<options>] B<--func> I<function-name> [I<filename>] 10 11 =head1 DESCRIPTION 12 13 The B<llvm-extract> command takes the name of a function and extracts it from 14 the specified LLVM bitcode file. It is primarily used as a debugging tool to 15 reduce test cases from larger programs that are triggering a bug. 16 17 In addition to extracting the bitcode of the specified function, 18 B<llvm-extract> will also remove unreachable global variables, prototypes, and 19 unused types. 20 21 The B<llvm-extract> command reads its input from standard input if filename is 22 omitted or if filename is -. The output is always written to standard output, 23 unless the B<-o> option is specified (see below). 24 25 =head1 OPTIONS 26 27 =over 28 29 =item B<-f> 30 31 Enable binary output on terminals. Normally, B<llvm-extract> will refuse to 32 write raw bitcode output if the output stream is a terminal. With this option, 33 B<llvm-extract> will write raw bitcode regardless of the output device. 34 35 =item B<--func> I<function-name> 36 37 Extract the function named I<function-name> from the LLVM bitcode. May be 38 specified multiple times to extract multiple functions at once. 39 40 =item B<--rfunc> I<function-regular-expr> 41 42 Extract the function(s) matching I<function-regular-expr> from the LLVM bitcode. 43 All functions matching the regular expression will be extracted. May be 44 specified multiple times. 45 46 =item B<--glob> I<global-name> 47 48 Extract the global variable named I<global-name> from the LLVM bitcode. May be 49 specified multiple times to extract multiple global variables at once. 50 51 =item B<--rglob> I<glob-regular-expr> 52 53 Extract the global variable(s) matching I<global-regular-expr> from the LLVM 54 bitcode. All global variables matching the regular expression will be extracted. 55 May be specified multiple times. 56 57 =item B<-help> 58 59 Print a summary of command line options. 60 61 =item B<-o> I<filename> 62 63 Specify the output filename. If filename is "-" (the default), then 64 B<llvm-extract> sends its output to standard output. 65 66 =item B<-S> 67 68 Write output in LLVM intermediate language (instead of bitcode). 69 70 =back 71 72 =head1 EXIT STATUS 73 74 If B<llvm-extract> succeeds, it will exit with 0. Otherwise, if an error 75 occurs, it will exit with a non-zero value. 76 77 =head1 SEE ALSO 78 79 L<bugpoint|bugpoint> 80 81 =head1 AUTHORS 82 83 Maintained by the LLVM Team (L<http://llvm.org/>). 84 85 =cut 86
