forked from OSchip/llvm-project
105 lines
2.3 KiB
ReStructuredText
105 lines
2.3 KiB
ReStructuredText
llvm-extract - extract a function from an LLVM module
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=====================================================
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SYNOPSIS
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--------
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**llvm-extract** [*options*] **--func** *function-name* [*filename*]
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DESCRIPTION
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-----------
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The **llvm-extract** command takes the name of a function and extracts it from
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the specified LLVM bitcode file. It is primarily used as a debugging tool to
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reduce test cases from larger programs that are triggering a bug.
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In addition to extracting the bitcode of the specified function,
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**llvm-extract** will also remove unreachable global variables, prototypes, and
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unused types.
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The **llvm-extract** command reads its input from standard input if filename is
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omitted or if filename is -. The output is always written to standard output,
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unless the **-o** option is specified (see below).
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OPTIONS
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-------
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**-f**
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Enable binary output on terminals. Normally, **llvm-extract** will refuse to
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write raw bitcode output if the output stream is a terminal. With this option,
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**llvm-extract** will write raw bitcode regardless of the output device.
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**--func** *function-name*
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Extract the function named *function-name* from the LLVM bitcode. May be
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specified multiple times to extract multiple functions at once.
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**--rfunc** *function-regular-expr*
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Extract the function(s) matching *function-regular-expr* 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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**--glob** *global-name*
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Extract the global variable named *global-name* from the LLVM bitcode. May be
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specified multiple times to extract multiple global variables at once.
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**--rglob** *glob-regular-expr*
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Extract the global variable(s) matching *global-regular-expr* from the LLVM
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bitcode. All global variables matching the regular expression will be extracted.
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May be specified multiple times.
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**-help**
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Print a summary of command line options.
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**-o** *filename*
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Specify the output filename. If filename is "-" (the default), then
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**llvm-extract** sends its output to standard output.
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**-S**
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Write output in LLVM intermediate language (instead of bitcode).
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EXIT STATUS
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-----------
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If **llvm-extract** 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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SEE ALSO
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--------
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bugpoint|bugpoint
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