Hello, Every time someone brings up the idea to remove libcall notes, people have to think really hard why GCC still has them. It seemed like a good idea to record and collect these issues in a meta-bug. Thus, see PR35413. Please open a new bug report (enhancement request, probably) for things that GCC still needs libcalls for, and make your new bug report block PR34513. Of course, it'd help if you then go on and remove that dependency on libcall notes ;-)
Gr. Steven