https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80283
--- Comment #18 from Michael_S <already5chosen at yahoo dot com> --- O.k. Not a back end. The part of compiler that is responsible for binding local variables to registers or to stack locations. I am assuming that such part exists in gcc and acts after tree-ter phase, but before instruction scheduling. If nothing like that exists then please forget the previous comment.
