He shares the demystified code here: https://bellard.org/otcc/otccn.c the TCC documentation sheds further light: https://bellard.org/tcc/tcc-doc.html#devel
He shares the demystified code here: https://bellard.org/otcc/otccn.c the TCC documentation sheds further light: https://bellard.org/tcc/tcc-doc.html#devel