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.IX Title "LLVM-EXTRACT 1"
.TH LLVM-EXTRACT 1 "2006-03-13" "CVS" "LLVM Command Guide"
.SH "NAME"
llvm\-extract \- extract a function from an LLVM module
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBllvm-extract\fR [\fIoptions\fR] \fB\-\-func\fR \fIfunction-name\fR [\fIfilename\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBllvm-extract\fR command takes the name of a function and extracts it from
the specified \s-1LLVM\s0 bytecode file.  It is primarily used as a debugging tool to
reduce test cases from larger programs that are triggering a bug.
.PP
In addition to extracting the bytecode of the specified function,
\&\fBllvm-extract\fR will also remove unreachable global variables, prototypes, and
unused types.
.PP
The \fBllvm-extract\fR 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 \fB\-o\fR option is specified (see below).
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-f\fR" 4
.IX Item "-f"
Force overwrite.  Normally, \fBllvm-extract\fR will refuse to overwrite an
output file that already exists.  With this option, \fBllvm-extract\fR
will overwrite the output file and replace it with new bytecode.
.IP "\fB\-\-func\fR \fIfunction-name\fR" 4
.IX Item "--func function-name"
Extract the function named \fIfunction-name\fR from the \s-1LLVM\s0 bytecode.
.IP "\fB\-\-help\fR" 4
.IX Item "--help"
Print a summary of command line options.
.IP "\fB\-o\fR \fIfilename\fR" 4
.IX Item "-o filename"
Specify the output filename.  If filename is \*(L"\-\*(R" (the default), then
\&\fBllvm-extract\fR sends its output to standard output.
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
If \fBllvm-extract\fR succeeds, it will exit with 0.  Otherwise, if an error
occurs, it will exit with a non-zero value.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
bugpoint
.SH "AUTHORS"
.IX Header "AUTHORS"
Maintained by the \s-1LLVM\s0 Team (<http://llvm.org>).