[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 #17 from William J. Schmidt <wschmidt at gcc dot gnu.org> 
2012-04-18 12:29:39 UTC ---
Author: wschmidt
Date: Wed Apr 18 12:29:23 2012
New Revision: 186568

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186568
Log:
gcc:

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

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

Added:
    trunk/gcc/testsuite/gfortran.dg/reassoc_11.f
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c