On Sun, Jun 29, 2025, 7:43 AM Andrew Pinski <pins...@gmail.com> wrote:
> On Sun, Jun 29, 2025, 7:36 AM Antoni Boucher via Gcc <gcc@gcc.gnu.org> > wrote: > >> Hi. >> Is there a way in GENERIC to specify that a parameter will be passed in >> "sret", or is this solely controlled by the hook struct_value_rtx? >> > > It is only controlled by the hook. > What exactly are trying to do? > You could set the return slot optimization bit on the call expression if > you want the lhs of a call not to be copied and just passed as the address > via sret. > > That is if you have: > StructVar = func(...); > > You set the return slot optimization bit on the call expr in generic and > which will copy that bit to the gimple GIMPLE_CALL and then during expand > will again copy it back to the generic call_expr and expand will use the > target for the address. > CALL_EXPR_RETURN_SLOT_OPT is the macro. > Is that what you are looking for? > > > Thanks, > Andrew > > Thanks. >> >
