On Mon, Oct 28, 2013 at 7:33 PM, Richard Henderson <r...@redhat.com> wrote: > On 10/28/2013 02:25 AM, Frederic Riss wrote: >> Is there a clean way to have the compiler discard the unneeded stack slot? > > Not yet. There is a rewrite of the atomic support in gcc to > move away from using builtins, which will allow two outputs > to be ssa allocacted. But this will not be complete for 4.9.
Though if the expander is ok with not having the stack slot and the result is not required we could fold this argument to NULL ... Richard. > > r~
