> I see. I do wonder how we should deal with the inherent
> dependence on optimization for [[musttail]] to work then? "Solve"
> the problem with good documentation?
For now that's good enough I think. If it's a significant problem
it can always be improved later.
> Offer a -fignore-musttail
> o
On Tue, May 21, 2024 at 3:35 PM Andi Kleen wrote:
>
> > I can't see how this triggers on the IL above, the loop should have
> > ignored both the return and the clobber and when recursing to
> > the predecessor stop before the above check when runnig into the
> > call?
>
> Yes, I tracked that down
> I can't see how this triggers on the IL above, the loop should have
> ignored both the return and the clobber and when recursing to
> the predecessor stop before the above check when runnig into the
> call?
Yes, I tracked that down later. The problem was that there
were multiple successors to th
On Mon, May 20, 2024 at 6:53 AM Andi Kleen wrote:
>
> On Tue, May 14, 2024 at 04:15:08PM +0200, Richard Biener wrote:
> > On Sun, May 5, 2024 at 8:16 PM Andi Kleen wrote:
> > >
> > > - Give error messages for all causes of non sibling call generation
> > > - Don't override choices of other non si
On Tue, May 14, 2024 at 04:15:08PM +0200, Richard Biener wrote:
> On Sun, May 5, 2024 at 8:16 PM Andi Kleen wrote:
> >
> > - Give error messages for all causes of non sibling call generation
> > - Don't override choices of other non sibling call checks with
> > must tail. This causes ICEs. The mus
> > diff --git a/gcc/testsuite/gcc.dg/plugin/must-tail-call-1.c
> > b/gcc/testsuite/gcc.dg/plugin/must-tail-call-1.c
> > index 3a6d4cceaba7..44af361e2925 100644
> > --- a/gcc/testsuite/gcc.dg/plugin/must-tail-call-1.c
> > +++ b/gcc/testsuite/gcc.dg/plugin/must-tail-call-1.c
> > @@ -1,4 +1,5 @@
> >
On Sun, May 5, 2024 at 8:16 PM Andi Kleen wrote:
>
> - Give error messages for all causes of non sibling call generation
> - Don't override choices of other non sibling call checks with
> must tail. This causes ICEs. The must tail attribute now only
> overrides flag_optimize_sibling_calls locally.
