[Patch, Fortran] Use __builtin_expect in libgfortran

[Tobias Burnus]

Andrew Thomas Pinski wrote:
> On Aug 3, 2008, at 3:36, Tobias Burnus 
> <tobias.burnus@physik.fu-berlin.de> wrote:
>>  if (unlikely fulfilled condition)
>> by
>>  if (__builtin_expect (unlikely fulfilled condition, 0))
> If rutime_error is marked as noreturn, gcc already does this internally.
Great! That reduces the patch size a lot (at least in terms of changed 
lines). Attached an updated version of the patch. Additional to removing 
the not needed __builtin_expected, I added __attribute__ ((format 
(printf...))) to two functions in libgfortran.h to improve compile-time 
error checking.

Build on x86-64-linux. OK for the trunk?

Tobias
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