https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84013
--- Comment #4 from Katsunori Kumatani <katsunori.kumatani at gmail dot com> --- Thanks, it's quite useful in some "meta asm" cases (in conjunction with plugins, asms can be useful since you can't add builtins). Or when doing custom calls in asms (or syscalls, etc) and you know what memory they touch, without having to clobber everything. :)