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.. opt - LLVM optimizer opt [options] [filename] The opt command is the modular LLVM optimizer and analyzer. It takes LLVM source files as input, runs the specified optimizations or analyses on it, and then outputs the optimized file. The optimizations available via opt depend upon what libraries were linked into it as well as any additional libraries that have been loaded with the \%-load option. Use the \%-help option to determine what optimizations you can use. If filename is omitted from the command line or is \(dq-\(dq, opt reads its input from standard input. Inputs can be in either the LLVM assembly language format (.ll) or the LLVM bitcode format (.bc). If an output filename is not specified with the \%-o option, opt writes its output to the standard output. NDENT 0.0

-f Enable binary output on terminals. Normally, opt will refuse to write raw bitcode output if the output stream is a terminal. With this option, opt will write raw bitcode regardless of the output device. NINDENT NDENT 0.0

-help Print a summary of command line options. NINDENT NDENT 0.0

-o <filename> Specify the output filename. NINDENT NDENT 0.0

-S Write output in LLVM intermediate language (instead of bitcode). NINDENT NDENT 0.0

-{passname} opt provides the ability to run any of LLVM\(aqs optimization or analysis passes in any order. The \%-help option lists all the passes available. The order in which the options occur on the command line are the order in which they are executed (within pass constraints). NINDENT NDENT 0.0

-strip-debug This option causes opt to strip debug information from the module before applying other optimizations. It is essentially the same as -strip but it ensures that stripping of debug information is done first. NINDENT NDENT 0.0

-verify-each This option causes opt to add a verify pass after every pass otherwise specified on the command line (including -verify). This is useful for cases where it is suspected that a pass is creating an invalid module but it is not clear which pass is doing it. NINDENT NDENT 0.0

-stats Print statistics. NINDENT NDENT 0.0

-time-passes Record the amount of time needed for each pass and print it to standard error. NINDENT NDENT 0.0

-debug If this is a debug build, this option will enable debug printouts from passes which use the LLVM_DEBUG() macro. See the \%LLVM Programmer\(aqs Manual, section #DEBUG for more information. NINDENT NDENT 0.0

-load=<plugin> Load the dynamic object plugin. This object should register new optimization or analysis passes. Once loaded, the object will add new command line options to enable various optimizations or analyses. To see the new complete list of optimizations, use the \%-help and \%-load options together. For example: NDENT 7.0 NDENT 3.5

opt -load=plugin.so -help

NINDENT NINDENT NINDENT NDENT 0.0

-print-passes Print all available passes and exit. NINDENT

If opt succeeds, it will exit with 0. Otherwise, if an error occurs, it will exit with a non-zero value. Maintained by the LLVM Team (https://llvm.org/). 2003-2023, LLVM Project Generated by docutils manpage writer.
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