re PR tree-optimization/52976 (Revision 186384 breaks the polyhedron tests aermod...

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

gcc:

2012-04-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/52976
	* tree-ssa-reassoc.c (add_to_ops_vec_max_rank): Delete.
	(possibly_move_powi): New function.
	(rewrite_expr_tree): Call possibly_move_powi.
	(rewrite_expr_tree_parallel): Likewise.
	(attempt_builtin_powi): Change call of add_to_ops_vec_max_rank to
	call add_to_ops_vec instead.

gcc/testsuite:

2012-04-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/52976
	gfortran.dg/reassoc_11.f: New test.

From-SVN: r186568