opt

LLVM optimizer

Optimize LLVM bitcode

$ opt [input.bc] -o [output.bc]

Run specific pass

$ opt -mem2reg [input.bc] -o [output.bc]

Enable all optimizations

$ opt -O3 [input.bc] -o [output.bc]

Print pass statistics

$ opt -stats [input.bc] -o [output.bc]

List available passes

$ opt --print-passes

opt [options] [input]

opt is the LLVM optimizer. Runs optimization passes on bitcode.
The tool transforms LLVM intermediate representation. Part of LLVM toolchain.

INPUT

LLVM bitcode file.

-o OUTPUT

Output file.

-OLEVEL

Optimization level (0-3).

--print-passes

List passes.

-stats

Print statistics.

--help

Display help information.

Part of LLVM. Works with bitcode only. Pass names version-specific.

opt was developed as part of the LLVM compiler infrastructure project.