> >
> > if (expected_loop_iterations_reliable_p (loop))
> > niters = expected_loop_iterations (loop);
>
> But why not simply never return bogus values from expected-loop-iterations?
Hmm, actually we do have:
/* If we have a measured profile, use it to estimate the number of
iterations.
On May 23, 2014 7:26:04 PM CEST, Jan Hubicka wrote:
>> On Thu, May 22, 2014 at 11:36 PM, Dehao Chen
>wrote:
>> > If a loop's header count is less than iteration count, the
>iteration
>> > estimation is apparently incorrect for this loop. Thus disable
>> > unrolling of such loops.
>> >
>> > Testin
> On Thu, May 22, 2014 at 11:36 PM, Dehao Chen wrote:
> > If a loop's header count is less than iteration count, the iteration
> > estimation is apparently incorrect for this loop. Thus disable
> > unrolling of such loops.
> >
> > Testing on going. OK for trunk if test pass?
>
> No. Why don't yo
On Thu, May 22, 2014 at 11:36 PM, Dehao Chen wrote:
> If a loop's header count is less than iteration count, the iteration
> estimation is apparently incorrect for this loop. Thus disable
> unrolling of such loops.
>
> Testing on going. OK for trunk if test pass?
No. Why don't you instead plug t
If a loop's header count is less than iteration count, the iteration
estimation is apparently incorrect for this loop. Thus disable
unrolling of such loops.
Testing on going. OK for trunk if test pass?
Thanks,
Dehao
gcc/ChangeLog:
2014-05-21 Dehao Chen
* cfgloop.h (expected_loop_iter
