Re: [PATCH Atom][PR middle-end/44382] Tree reassociation improvement

[Ilya Enkovich <enkovich dot gnu at gmail dot com>]

>?Ilya, please mention PR middle-end/44382
> in ChangeLog.
>

Thanks for notice. Here is corrected ChangeLog:

gcc/

2011-07-12  Enkovich Ilya  <ilya.enkovich@intel.com>

       PR middle-end/44382
       * target.def (reassociation_width): New hook.

       * doc/tm.texi.in (reassociation_width): New hook documentation.

       * doc/tm.texi (reassociation_width): Likewise.

       * hooks.h (hook_int_const_gimple_1): New default hook.

       * hooks.c (hook_int_const_gimple_1): Likewise.

       * config/i386/i386.h (ix86_tune_indices): Add
       X86_TUNE_REASSOC_INT_TO_PARALLEL and
       X86_TUNE_REASSOC_FP_TO_PARALLEL.

       (TARGET_REASSOC_INT_TO_PARALLEL): New.
       (TARGET_REASSOC_FP_TO_PARALLEL): Likewise.

       * config/i386/i386.c (initial_ix86_tune_features): Add
       X86_TUNE_REASSOC_INT_TO_PARALLEL and
       X86_TUNE_REASSOC_FP_TO_PARALLEL.

       (ix86_reassociation_width) implementation of
       new hook for i386 target.

       * common.opt (ftree-reassoc-width): New option added.

       * tree-ssa-reassoc.c (get_required_cycles): New function.
       (get_reassociation_width): Likewise.
       (rewrite_expr_tree_parallel): Likewise.

       (reassociate_bb): Now checks reassociation width to be used
       and call rewrite_expr_tree_parallel instead of rewrite_expr_tree
       if needed.

       (pass_reassoc): TODO_remove_unused_locals flag added.

gcc/testsuite/

2011-07-12  Enkovich Ilya  <ilya.enkovich@intel.com>

       * gcc.dg/tree-ssa/pr38533.c (dg-options): Added option
       -ftree-reassoc-width=1.

       * gcc.dg/tree-ssa/reassoc-24.c: New test.
       * gcc.dg/tree-ssa/reassoc-25.c: Likewise.