An EVM Byte code Super Optimizer
The tool ebso automatically finds optimizations for loop-free Ethereum byte code. Therefore ebso employs a method called unbounded superoptimization (Jangda & Yorsh, 2017), which relies on a constraint solver to guarantee correctness of the transformation. Through superoptimization ebso automatically finds programs that need less gas, but are observationally equivalent. The search for these cheaper programs is encoded as an SMT problem, which ebso solves relying on Z3.
Installation and Running
The easiest way to install ebso is using opam.
opam install . after cloning the repository.
Afterwards one can run
ebso -help for information on how to call ebso.
$ ./ebso -translation-validation 256 -direct "600003600301" Optimized PUSH 0 SUB PUSH 3 ADD to PUSH 3 SUB Saved 6 gas, translation validation successful, this instruction sequence is optimal.