[Bug middle-end/57073] __builtin_powif (-1.0, k) should be optimized to "1.0 - 2.0 * (K%2)"

[tkoenig at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57073

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
   Last reconfirmed|                            |2013-05-31
         Resolution|FIXED                       |---
     Ever confirmed|0                           |1

--- Comment #14 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The patch at

http://gcc.gnu.org/ml/gcc-cvs/2013-05/msg01050.html

is wrong; the optimization is only done when, for
2.0**i, i is a constant integer.  power_6.f90 also
fails as a result.

Tobias, could you revert this patch?