The tool sorg takes a sequence of EVM bytecode instructions s and an observationally equvivalent optimized sequence of EVM bytecode instructions t and generates a rewrite rule, which can be used for peephole optimizations.

$ sorg "PUSH 0 SUB PUSH 3 ADD PUSH 42" "PUSH 3 SUB PUSH 42"

PUSH 0 SUB PUSH w_3 ADD => PUSH w_3 SUB