chore(EOF): Use Bytecode::new_legacy

[rakita]

refactor to be more explicit

[github-actions]

Valgrind Results:

==3947== Cachegrind, a cache and branch-prediction profiler
==3947== Copyright (C) 2002-2017, and GNU GPL'd, by Nicholas Nethercote et al.
==3947== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==3947== Command: target/release/snailtracer
==3947== 
--3947-- warning: L3 cache found, using its data for the LL simulation.
Running snailtracer example!
elapsed: 1.828824357s
==3947== 
==3947== I   refs:      427,042,419
==3947== I1  misses:          3,154
==3947== LLi misses:          2,844
==3947== I1  miss rate:        0.00%
==3947== LLi miss rate:        0.00%
==3947== 
==3947== D   refs:      204,077,710  (132,269,246 rd   + 71,808,464 wr)
==3947== D1  misses:        340,019  (    200,049 rd   +    139,970 wr)
==3947== LLd misses:        137,816  (      4,496 rd   +    133,320 wr)
==3947== D1  miss rate:         0.2% (        0.2%     +        0.2%  )
==3947== LLd miss rate:         0.1% (        0.0%     +        0.2%  )
==3947== 
==3947== LL refs:           343,173  (    203,203 rd   +    139,970 wr)
==3947== LL misses:         140,660  (      7,340 rd   +    133,320 wr)
==3947== LL miss rate:          0.0% (        0.0%     +        0.2%  )