This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/44382] Slow integer multiply
- From: "hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 06 Sep 2011 16:42:56 +0000
- Subject: [Bug middle-end/44382] Slow integer multiply
- Auto-submitted: auto-generated
- References: <bug-44382-4@http.gcc.gnu.org/bugzilla/>
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.enkovich@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.enkovich@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