calloc = malloc + memset

[Richard Biener]

On Mon, Jun 23, 2014 at 6:19 PM, Marc Glisse <marc.glisse@inria.fr> wrote:
> On Mon, 23 Jun 2014, Richard Biener wrote:
>
>> On June 23, 2014 5:51:30 PM CEST, Marc Glisse <marc.glisse@inria.fr>
>> wrote:
>>>
>>> On Mon, 23 Jun 2014, Jakub Jelinek wrote:
>>>
>>>> Ok for trunk, sorry for the delay.
>>>
>>>
>>> Thanks. Richard has moved the passes a bit since then, but I still have
>>>
>>> exactly one spot where the testsuite is ok :-) I need strlen to be
>>> after
>>> dom (for calloc.C) and before vrp (for several strlenopt-*.c). I'll
>>> commit
>>> it tomorrow if there aren't any comments on the pass placement.
>>
>>
>> But vrp does not run at -O1 - does strlenopt?
>
>
>     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_foptimize_strlen, NULL, 1 },
>     { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
>
> So that's just a missed optimization at -Os, I guess.

Ok, that's fine (not sure why we restrict all of strilenopt instead of
just those
transforms that are harmful for -Os).

Richard.

> --
> Marc Glisse