> 2011/7/14 Richard Guenther <richard.guent...@gmail.com>: >> >> But then how comes the option to override it is useful? It isn't dependent >> on the particular case. At least the option should be a --param. >> >> Richard. >> > > Option is still useful if you want to try feature on platform with no > hook implemented and for other performance experiments. I agree > --param usage should be better here. I'll fix it. > > Ilya >
Here is a patch with new param instead of new option. Bootstrapped and
checked on x86_64-linux.
Ilya
--
gcc/
2011-07-14 Enkovich Ilya <ilya.enkov...@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.
* doc/invoke.texi (tree-reassoc-width): New param documented.
* 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.
* params.def (PARAM_TREE_REASSOC_WIDTH): New param 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/
2011-07-14 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.
PR44382.diff
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