d409305fa3
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvmorg-12.0.0-0-gd28af7c654d8, a.k.a. 12.0.0 release. PR: 255570 MFC after: 6 weeks
178 lines
4.7 KiB
Groff
178 lines
4.7 KiB
Groff
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.TH "LLVM-EXTRACT" "1" "2021-06-07" "12" "LLVM"
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.SH NAME
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llvm-extract \- extract a function from an LLVM module
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.SH SYNOPSIS
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.sp
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\fBllvm\-extract\fP [\fIoptions\fP] \fB\-\-func\fP \fIfunction\-name\fP [\fIfilename\fP]
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.SH DESCRIPTION
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.sp
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The \fBllvm\-extract\fP command takes the name of a function and extracts
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it from the specified LLVM bitcode file. It is primarily used as a debugging
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tool to reduce test cases from larger programs that are triggering a bug.
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.sp
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In addition to extracting the bitcode of the specified function,
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\fBllvm\-extract\fP will also remove unreachable global variables,
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prototypes, and unused types.
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.sp
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The \fBllvm\-extract\fP command reads its input from standard input if
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filename is omitted or if filename is \fB\-\fP\&. The output is always written to
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standard output, unless the \fB\-o\fP option is specified (see below).
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.SH OPTIONS
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.sp
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\fB\-\-alias\fP \fIalias\-name\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the alias named \fIfunction\-name\fP from the LLVM bitcode. May be
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specified multiple times to extract multiple alias at once.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-ralias\fP \fIalias\-regular\-expr\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the alias matching \fIalias\-regular\-expr\fP from the LLVM bitcode.
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All alias matching the regular expression will be extracted. May be
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specified multiple times.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-bb\fP \fIbasic\-block\-specifier\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract basic blocks(s) specified in \fIbasic\-block\-specifier\fP\&. May be
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specified multiple times. Each <function:bb[;bb]> specifier pair will create
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a function. If multiple basic blocks are specified in one pair, the first
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block in the sequence should dominate the rest.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-delete\fP
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.INDENT 0.0
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.INDENT 3.5
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Delete specified Globals from Module.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-f\fP
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.INDENT 0.0
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.INDENT 3.5
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Enable binary output on terminals. Normally, \fBllvm\-extract\fP will
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refuse to write raw bitcode output if the output stream is a terminal. With
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this option, \fBllvm\-extract\fP will write raw bitcode regardless of the
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output device.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-func\fP \fIfunction\-name\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the function named \fIfunction\-name\fP from the LLVM bitcode. May be
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specified multiple times to extract multiple functions at once.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-rfunc\fP \fIfunction\-regular\-expr\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the function(s) matching \fIfunction\-regular\-expr\fP from the LLVM bitcode.
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All functions matching the regular expression will be extracted. May be
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specified multiple times.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-glob\fP \fIglobal\-name\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the global variable named \fIglobal\-name\fP from the LLVM bitcode. May be
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specified multiple times to extract multiple global variables at once.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-rglob\fP \fIglob\-regular\-expr\fP
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.INDENT 0.0
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.INDENT 3.5
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Extract the global variable(s) matching \fIglobal\-regular\-expr\fP from the LLVM
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bitcode. All global variables matching the regular expression will be
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extracted. May be specified multiple times.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-keep\-const\-init\fP
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.INDENT 0.0
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.INDENT 3.5
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Preserve the values of constant globals.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-\-recursive\fP
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.INDENT 0.0
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.INDENT 3.5
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Recursively extract all called functions
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-help\fP
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.INDENT 0.0
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.INDENT 3.5
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Print a summary of command line options.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-o\fP \fIfilename\fP
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.INDENT 0.0
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.INDENT 3.5
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Specify the output filename. If filename is "\-" (the default), then
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\fBllvm\-extract\fP sends its output to standard output.
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.UNINDENT
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.UNINDENT
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.sp
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\fB\-S\fP
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.INDENT 0.0
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.INDENT 3.5
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Write output in LLVM intermediate language (instead of bitcode).
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.UNINDENT
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.UNINDENT
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.SH EXIT STATUS
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.sp
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If \fBllvm\-extract\fP succeeds, it will exit with 0. Otherwise, if an error
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occurs, it will exit with a non\-zero value.
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.SH SEE ALSO
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.sp
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\fBbugpoint(1)\fP
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.SH AUTHOR
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Maintained by the LLVM Team (https://llvm.org/).
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.SH COPYRIGHT
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2003-2021, LLVM Project
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.\" Generated by docutils manpage writer.
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