[Bug tree-optimization/46728] GCC does not generate fmadd for pow (x, 0.75)+y on powerpc

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46728

--- Comment #4 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-05-24 
18:02:27 UTC ---
Author: wschmidt
Date: Tue May 24 18:02:22 2011
New Revision: 174129

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174129
Log:
2011-05-24  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

    PR tree-optimization/46728
    * tree-ssa-math-opts.c (powi_table): New.
    (powi_lookup_cost): New.
    (powi_cost): New.
    (powi_as_mults_1): New.
    (powi_as_mults): New.
    (gimple_expand_builtin_powi): New.
    (execute_cse_sincos): Add switch case for BUILT_IN_POWI.
    (gate_cse_sincos): Remove sincos/cexp restriction.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-math-opts.c