test(compiler): exhaustively compare optimised small expressions

import ctypes

import itertools

import mmap

import multiprocessing

import resource

    cases += [("let", "a", ("+", "x", 3), ("+", "y", ("let", "b", "t", ("*", "a", "b")))),

              ("let", "x", "y", ("if", "t", ("+", "x", 1), ("-", "x", 1)))]

    cases += [generate(rng, 5, ["x", "y", "t"]) for _ in range(117)]

    atoms = (0,1,MASK,'x','y','t')

    exhaustive = list(atoms)

    exhaustive += [(op,a,b) for op in OPERATORS for a,b in itertools.product(atoms,repeat=2)]

    exhaustive += [('if',c,a,b) for c,a,b in itertools.product(atoms,repeat=3)]

    exhaustive += [('let','a',value,body) for value in atoms for body in (*atoms,'a')]

    assert len(exhaustive) == 588

    cases += exhaustive

    comparisons = 0

    with tempfile.TemporaryDirectory() as directory:

        path, binary = Path(directory) / "source", Path(directory) / "binary"