http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44382
--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2011-09-06 16:42:56 UTC --- Author: hjl Date: Tue Sep 6 16:42:47 2011 New Revision: 178602 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=178602 Log: PR middle-end/44382: Tree reassociation improvement gcc/ 2011-09-06 Enkovich Ilya <ilya.enkov...@intel.com> PR middle-end/44382 * target.def (reassociation_width): New hook. * doc/tm.texi.in (reassociation_width): Likewise. * doc/tm.texi (reassociation_width): Likewise. * doc/invoke.texi (tree-reassoc-width): New param documented. * hooks.h (hook_int_uint_mode_1): New default hook. * hooks.c (hook_int_uint_mode_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. * params.def (PARAM_TREE_REASSOC_WIDTH): New param added. * tree-ssa-reassoc.c (get_required_cycles): New function. (get_reassociation_width): Likewise. (swap_ops_for_binary_stmt): Likewise. (rewrite_expr_tree_parallel): Likewise. (rewrite_expr_tree): Refactored. Part of code moved into swap_ops_for_binary_stmt. (reassociate_bb): Now checks reassociation width to be used and call rewrite_expr_tree_parallel instead of rewrite_expr_tree if needed. gcc/testsuite/ 2011-09-06 Enkovich Ilya <ilya.enkov...@intel.com> * gcc.dg/tree-ssa/pr38533.c (dg-options): Added option --param tree-reassoc-width=1. * gcc.dg/tree-ssa/reassoc-24.c: New test. * gcc.dg/tree-ssa/reassoc-25.c: Likewise. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-24.c trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-25.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.h trunk/gcc/doc/invoke.texi trunk/gcc/doc/tm.texi trunk/gcc/doc/tm.texi.in trunk/gcc/hooks.c trunk/gcc/hooks.h trunk/gcc/params.def trunk/gcc/target.def trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/tree-ssa/pr38533.c trunk/gcc/tree-ssa-reassoc.c