opt Command Examples
Runs optimizations and analyse LLVM source files. More information: https://llvm.org/docs/CommandGuide/opt.html.
- Run an optimization or analysis on a bitcode file:
opt -{{passname}} {{path/to/file.bc}} -S -o {{file_opt.bc}}
- Output the Control Flow Graph of a function to a
.dot
file:
opt {{-dot-cfg}} -S {{path/to/file.bc}} -disable-output
- Optimize the program at level 2 and output the result to another file:
opt -O2 {{path/to/file.bc}} -S -o {{path/to/output_file.bc}}