[Bug tree-optimization/52976] [4.8 Regression] Revision 186384 breaks the polyhedron tests aermod.f90 and doduc.f90 at -O3 -ffast-math

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52976

--- Comment #10 from William J. Schmidt <wschmidt at gcc dot gnu.org> 
2012-04-16 12:16:04 UTC ---
Author: wschmidt
Date: Mon Apr 16 12:15:50 2012
New Revision: 186493

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186493
Log:
2012-04-16  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

    PR tree-optimization/52976
    * tree-ssa-reassoc.c (add_to_ops_vec_max_rank): New function.
    (undistribute_ops_list): Ops with repeat counts aren't eligible for
    undistribution.
    (attempt_builtin_powi): Call add_to_ops_vec_max_rank.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c