https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87096
--- Comment #10 from Rich Felker <bugdal at aerifal dot cx> --- Indeed, I think the POSIX requirement is both in conflict with the requirements of the C language and a bad requirement in itself. As for what GCC should do, since there room for debate about which behavior is correct, and library implementations might even continue to disagree/diverge from one or both of the standards for some time, I do not think GCC should be overruling the choices made by the library implementation here. The folding for this case should either happen only for constant size arguments <=INT_MAX, or should produce a runtime check and force a function call for the case where it's >INT_MAX.
