[Bug tree-optimization/18589] could optimize FP multiplies better

["wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18589

--- Comment #9 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2012-04-12 16:15:24 UTC ---
Author: wschmidt
Date: Thu Apr 12 16:15:13 2012
New Revision: 186384

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186384
Log:
gcc:

2012-04-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    PR tree-optimization/18589
    * tree-ssa-reassoc.c (reassociate_stats): Add two fields.
    (operand_entry): Add count field.
    (add_repeat_to_ops_vec): New function.
    (completely_remove_stmt): Likewise.
    (remove_def_if_absorbed_call): Likewise.
    (remove_visited_stmt_chain): Remove feeding builtin pow/powi calls.
    (acceptable_pow_call): New function.
    (linearize_expr_tree): Look for builtin pow/powi calls and add operand
    entries with repeat counts when found.
    (repeat_factor_d): New struct and associated typedefs.
    (repeat_factor_vec): New static vector variable.
    (compare_repeat_factors): New function.
    (get_reassoc_pow_ssa_name): Likewise.
    (attempt_builtin_powi): Likewise.
    (reassociate_bb): Call attempt_builtin_powi.
    (fini_reassoc): Two new calls to statistics_counter_event.

gcc/testsuite:

2012-04-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    PR tree-optimization/18589
    * gcc.dg/tree-ssa/pr18589-1.c: New test.
    * gcc.dg/tree-ssa/pr18589-2.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-3.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-4.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-5.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-6.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-7.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-8.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-9.c: Likewise.
    * gcc.dg/tree-ssa/pr18589-10.c: Likewise.



Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-10.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-4.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-5.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-6.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-7.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-8.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr18589-9.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c

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