diff options
| author | Enkovich Ilya <ilya.enkovich@intel.com> | 2011-09-06 16:42:47 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2011-09-06 09:42:47 -0700 |
| commit | df7b0cc4aae0620d830b8e9f8ed8a586e68f470b (patch) | |
| tree | 1f9104f6409decb81158ba4c73d5eed24b186893 /gcc/doc | |
| parent | df2f61000e93a5c300703c9f23af007c0621693f (diff) | |
| download | gcc-df7b0cc4aae0620d830b8e9f8ed8a586e68f470b.zip gcc-df7b0cc4aae0620d830b8e9f8ed8a586e68f470b.tar.gz gcc-df7b0cc4aae0620d830b8e9f8ed8a586e68f470b.tar.bz2 | |
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.
From-SVN: r178602
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 5 | ||||
| -rw-r--r-- | gcc/doc/tm.texi | 5 | ||||
| -rw-r--r-- | gcc/doc/tm.texi.in | 2 |
3 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index c5b19eb..b1ff187 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -9076,6 +9076,11 @@ The smallest number of different values for which it is best to use a jump-table instead of a tree of conditional branches. If the value is 0, use the default for the machine. The default is 0. +@item tree-reassoc-width +Set the maximum number of instructions executed in parallel in +reassociated tree. This parameter overrides target dependent +heuristics used by default if has non zero value. + @end table @end table diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 7364aa1..335c1d1 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -6840,6 +6840,11 @@ the order of instructions is important for correctness when scheduling, but also the latencies of operations. @end deftypevr +@deftypefn {Target Hook} int TARGET_SCHED_REASSOCIATION_WIDTH (unsigned int @var{opc}, enum machine_mode @var{mode}) +This hook is called by tree reassociator to determine a level of +parallelism required in output calculations chain. +@end deftypefn + @node Sections @section Dividing the Output into Sections (Texts, Data, @dots{}) @c the above section title is WAY too long. maybe cut the part between diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in index 4535fd6..6783826 100644 --- a/gcc/doc/tm.texi.in +++ b/gcc/doc/tm.texi.in @@ -6774,6 +6774,8 @@ in its second parameter. @hook TARGET_SCHED_EXPOSED_PIPELINE +@hook TARGET_SCHED_REASSOCIATION_WIDTH + @node Sections @section Dividing the Output into Sections (Texts, Data, @dots{}) @c the above section title is WAY too long. maybe cut the part between |