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.IX Title "EXTRACT 1"
.TH EXTRACT 1 "1.3" "2004-07-04" "LLVM Command Guide"
.UC
.SH "NAME"
extract \- extract a function from an \s-1LLVM\s0 module
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBextract\fR [\fIoptions\fR] \fB\*(--func\fR \fIfunction-name\fR [\fIfilename\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBextract\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,
\&\fBextract\fR will also remove unreachable global variables, prototypes, and
unused types.
.PP
The \fBextract\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, \fBextract\fR will refuse to overwrite an
output file that already exists.  With this option, \fBextract\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
\&\fBextract\fR sends its output to standard output.
.Ip "\fB\*(--stats\fR" 4
.IX Item "stats"
Print statistics.
.Ip "\fB\*(--time-passes\fR" 4
.IX Item "time-passes"
Record the amount of time needed for each pass and print it to standard
error.
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
If \fBextract\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.cs.uiuc.edu).