https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97474
--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> --- Yeah, adding restrict there is just wrong; the constructor is called outside the function, and could e.g. stash a pointer to the object in a global variable. What we actually want is to treat this reference parameter like a value parameter. Is that information actually useful to the optimizers?
