https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123769
--- Comment #7 from Jim Zatorski <jimzat at gmail dot com> --- Thanks Andrew. I've been an embedded developer for almost 40 years and this is the first I've heard of a "red zone". The only advantage that I see is that you save one instruction at the beginning of a routine by not having to adjust the SP if you're only using a "little bit" of stack space. - JiMZ
