Am 28.04.2013 10:32, schrieb Thomas Koenig:
the attached patch does some optimization on
power using ishft and iand, as discussed in the PR.
I have left out handling real numbers, that should be left
to the middle-end (PR 57073).
Regression-tested. OK for trunk?
OK - thanks for the patch.
I wonder whether one should also handle:
1**k == 1
That should only happen (in-real-world code) due to simplifying other
expressions but it is simple to implement.
(0**k is also possible, but it gets more complicated: 0 for k > 0, 1 for
k == 0 and invalid for k < 0 [which one might ignore]. As this is really
special, one can also leave the library call.)
Tobias
2013-04-28 Thomas Koenig <tkoe...@gcc.gnu.org>
PR fortran/57071
* frontend-passes (optimize_power): New function.
(optimize_op): Use it.
2013-04-28 Thomas Koenig <tkoe...@gcc.gnu.org>
PR fortran/57071
* gfortran.dg/power_3.f90: New test.
* gfortran.dg/power_4.f90: New test.
