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| author | Bernd Schmidt <bernds@codesourcery.com> | 2011-09-30 13:33:54 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2011-09-30 13:33:54 +0000 |
| commit | 06d7e8e7066b42f440993419493909fefafdc4d5 (patch) | |
| tree | d5defa483a7652bacc4b555ea1317b96b9ec56a0 /gcc/doc/invoke.texi | |
| parent | ccb3dd5a143aa1975281425685a70f7bd6a130fa (diff) | |
| download | gcc-06d7e8e7066b42f440993419493909fefafdc4d5.zip gcc-06d7e8e7066b42f440993419493909fefafdc4d5.tar.gz gcc-06d7e8e7066b42f440993419493909fefafdc4d5.tar.bz2 | |
haifa-sched.c (modulo_ii, [...]): New static variables.
* haifa-sched.c (modulo_ii, modulo_max_states, modulo_n_insns,
modulo_insns_scheduled, modulo_iter0_max_uid, modulo_backtracks_left,
modulo_last_stage): New static variables.
(set_modulo_params, discard_delay_pairs_above): New functions.
(struct delay_pair): New member stages.
(htab_i2_traverse, htab_i1_traverse): New static functions.
(record_delay_slot_pair): New arg stages. All callers changed.
Record it.
(pair_delay): Take stages into account.
(add_delay_dependencies): Don't do so for stage pairs.
(struct sched_block_state): New member modulo_epilogue.
(save_backtrack_point): Don't set SHADOW_P for stage pairs.
(unschedule_insns_until): Decrease modulo_insns_scheduled.
Set HARD_DEP without using or.
(resolve_dependencies): New static function.
(prune_ready_list): New arg modulo_epilogue_p. All callers changed.
If it is true, allow only insns with INSN_EXACT_TICK set.
(schedule_block): Return bool, always true for normal scheduling,
true or false depending on modulo scheduling success otherwise.
Add bookkeeping for modulo scheduling, and call resolve_dependencies
on everything left over after a modulo schedule.
(haifa_sched_init): Remove check_cfg call. Clear modulo_ii.
* sched-int.h (schedule_block, record_delay_slot_pair): Adjust
declarations.
(set_modulo_params, discard_delay_pairs_above): Declare.
* params.def (PARAM_MAX_MODULO_BACKTRACK_ATTEMPS): New.
* doc/invoke.texi (--param): Document it.
From-SVN: r179383
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 0ce15ff..8e43f82 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -8474,6 +8474,11 @@ before flushing the current state and starting over. Large functions with few branches or calls can create excessively large lists which needlessly consume memory and resources. +@item max-modulo-backtrack-attempts +The maximum number of backtrack attempts the scheduler should make +when modulo scheduling a loop. Larger values can exponentially increase +compile time. + @item max-inline-insns-single Several parameters control the tree inliner used in gcc. This number sets the maximum number of instructions (counted in GCC's |