opt
LLVM optimizer
TLDR
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
SYNOPSIS
opt [options] [input]
DESCRIPTION
opt is the LLVM optimizer. Runs optimization passes on bitcode.The tool transforms LLVM intermediate representation. Part of LLVM toolchain.
PARAMETERS
INPUT
LLVM bitcode file.-o OUTPUT
Output file.-OLEVEL
Optimization level (0-3).--print-passes
List passes.-stats
Print statistics.--help
Display help information.
INSTALL
sudo apt install llvm
sudo dnf install llvm
sudo pacman -S llvm
sudo apk add llvm
sudo zypper install llvm
brew install llvm
nix profile install nixpkgs#llvm
CAVEATS
Part of LLVM. Works with bitcode only. Pass names version-specific.
HISTORY
opt was developed as part of the LLVM compiler infrastructure project.