re PR tree-optimization/52976 (Revision 186384 breaks the polyhedron tests aermod.f90 and doduc.f90 at -O3 -ffast-math)

2012-04-16  Bill Schmidt  <wschmidt@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.

From-SVN: r186493