On 10/29/2013 03:06 AM, Richard Biener wrote: > 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 ...
FWIW, the md interface returns two registers. r~
