1 /* Instruction scheduling pass. Selective scheduler and pipeliner.
2 Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
22 #include "coretypes.h"
27 #include "hard-reg-set.h"
31 #include "insn-config.h"
32 #include "insn-attr.h"
39 #include "tree-pass.h"
40 #include "sched-int.h"
44 #include "langhooks.h"
45 #include "rtlhooks-def.h"
47 #ifdef INSN_SCHEDULING
48 #include "sel-sched-ir.h"
49 /* We don't have to use it except for sel_print_insn. */
50 #include "sel-sched-dump.h"
52 /* A vector holding bb info for whole scheduling pass. */
53 VEC(sel_global_bb_info_def
, heap
) *sel_global_bb_info
= NULL
;
55 /* A vector holding bb info. */
56 VEC(sel_region_bb_info_def
, heap
) *sel_region_bb_info
= NULL
;
58 /* A pool for allocating all lists. */
59 alloc_pool sched_lists_pool
;
61 /* This contains information about successors for compute_av_set. */
62 struct succs_info current_succs
;
64 /* Data structure to describe interaction with the generic scheduler utils. */
65 static struct common_sched_info_def sel_common_sched_info
;
67 /* The loop nest being pipelined. */
68 struct loop
*current_loop_nest
;
70 /* LOOP_NESTS is a vector containing the corresponding loop nest for
72 static VEC(loop_p
, heap
) *loop_nests
= NULL
;
74 /* Saves blocks already in loop regions, indexed by bb->index. */
75 static sbitmap bbs_in_loop_rgns
= NULL
;
77 /* CFG hooks that are saved before changing create_basic_block hook. */
78 static struct cfg_hooks orig_cfg_hooks
;
81 /* Array containing reverse topological index of function basic blocks,
82 indexed by BB->INDEX. */
83 static int *rev_top_order_index
= NULL
;
85 /* Length of the above array. */
86 static int rev_top_order_index_len
= -1;
88 /* A regset pool structure. */
91 /* The stack to which regsets are returned. */
100 /* In VV we save all generated regsets so that, when destructing the
101 pool, we can compare it with V and check that every regset was returned
105 /* The pointer of VV stack. */
111 /* The difference between allocated and returned regsets. */
113 } regset_pool
= { NULL
, 0, 0, NULL
, 0, 0, 0 };
115 /* This represents the nop pool. */
118 /* The vector which holds previously emitted nops. */
126 } nop_pool
= { NULL
, 0, 0 };
128 /* The pool for basic block notes. */
129 static rtx_vec_t bb_note_pool
;
131 /* A NOP pattern used to emit placeholder insns. */
132 rtx nop_pattern
= NULL_RTX
;
133 /* A special instruction that resides in EXIT_BLOCK.
134 EXIT_INSN is successor of the insns that lead to EXIT_BLOCK. */
135 rtx exit_insn
= NULL_RTX
;
137 /* TRUE if while scheduling current region, which is loop, its preheader
139 bool preheader_removed
= false;
142 /* Forward static declarations. */
143 static void fence_clear (fence_t
);
145 static void deps_init_id (idata_t
, insn_t
, bool);
146 static void init_id_from_df (idata_t
, insn_t
, bool);
147 static expr_t
set_insn_init (expr_t
, vinsn_t
, int);
149 static void cfg_preds (basic_block
, insn_t
**, int *);
150 static void prepare_insn_expr (insn_t
, int);
151 static void free_history_vect (VEC (expr_history_def
, heap
) **);
153 static void move_bb_info (basic_block
, basic_block
);
154 static void remove_empty_bb (basic_block
, bool);
155 static void sel_remove_loop_preheader (void);
157 static bool insn_is_the_only_one_in_bb_p (insn_t
);
158 static void create_initial_data_sets (basic_block
);
160 static void free_av_set (basic_block
);
161 static void invalidate_av_set (basic_block
);
162 static void extend_insn_data (void);
163 static void sel_init_new_insn (insn_t
, int);
164 static void finish_insns (void);
166 /* Various list functions. */
168 /* Copy an instruction list L. */
170 ilist_copy (ilist_t l
)
172 ilist_t head
= NULL
, *tailp
= &head
;
176 ilist_add (tailp
, ILIST_INSN (l
));
177 tailp
= &ILIST_NEXT (*tailp
);
184 /* Invert an instruction list L. */
186 ilist_invert (ilist_t l
)
192 ilist_add (&res
, ILIST_INSN (l
));
199 /* Add a new boundary to the LP list with parameters TO, PTR, and DC. */
201 blist_add (blist_t
*lp
, insn_t to
, ilist_t ptr
, deps_t dc
)
206 bnd
= BLIST_BND (*lp
);
211 BND_AV1 (bnd
) = NULL
;
215 /* Remove the list note pointed to by LP. */
217 blist_remove (blist_t
*lp
)
219 bnd_t b
= BLIST_BND (*lp
);
221 av_set_clear (&BND_AV (b
));
222 av_set_clear (&BND_AV1 (b
));
223 ilist_clear (&BND_PTR (b
));
228 /* Init a fence tail L. */
230 flist_tail_init (flist_tail_t l
)
232 FLIST_TAIL_HEAD (l
) = NULL
;
233 FLIST_TAIL_TAILP (l
) = &FLIST_TAIL_HEAD (l
);
236 /* Try to find fence corresponding to INSN in L. */
238 flist_lookup (flist_t l
, insn_t insn
)
242 if (FENCE_INSN (FLIST_FENCE (l
)) == insn
)
243 return FLIST_FENCE (l
);
251 /* Init the fields of F before running fill_insns. */
253 init_fence_for_scheduling (fence_t f
)
255 FENCE_BNDS (f
) = NULL
;
256 FENCE_PROCESSED_P (f
) = false;
257 FENCE_SCHEDULED_P (f
) = false;
260 /* Add new fence consisting of INSN and STATE to the list pointed to by LP. */
262 flist_add (flist_t
*lp
, insn_t insn
, state_t state
, deps_t dc
, void *tc
,
263 insn_t last_scheduled_insn
, VEC(rtx
,gc
) *executing_insns
,
264 int *ready_ticks
, int ready_ticks_size
, insn_t sched_next
,
265 int cycle
, int cycle_issued_insns
,
266 bool starts_cycle_p
, bool after_stall_p
)
271 f
= FLIST_FENCE (*lp
);
273 FENCE_INSN (f
) = insn
;
275 gcc_assert (state
!= NULL
);
276 FENCE_STATE (f
) = state
;
278 FENCE_CYCLE (f
) = cycle
;
279 FENCE_ISSUED_INSNS (f
) = cycle_issued_insns
;
280 FENCE_STARTS_CYCLE_P (f
) = starts_cycle_p
;
281 FENCE_AFTER_STALL_P (f
) = after_stall_p
;
283 gcc_assert (dc
!= NULL
);
286 gcc_assert (tc
!= NULL
|| targetm
.sched
.alloc_sched_context
== NULL
);
289 FENCE_LAST_SCHEDULED_INSN (f
) = last_scheduled_insn
;
290 FENCE_EXECUTING_INSNS (f
) = executing_insns
;
291 FENCE_READY_TICKS (f
) = ready_ticks
;
292 FENCE_READY_TICKS_SIZE (f
) = ready_ticks_size
;
293 FENCE_SCHED_NEXT (f
) = sched_next
;
295 init_fence_for_scheduling (f
);
298 /* Remove the head node of the list pointed to by LP. */
300 flist_remove (flist_t
*lp
)
302 if (FENCE_INSN (FLIST_FENCE (*lp
)))
303 fence_clear (FLIST_FENCE (*lp
));
307 /* Clear the fence list pointed to by LP. */
309 flist_clear (flist_t
*lp
)
315 /* Add ORIGINAL_INSN the def list DL honoring CROSSES_CALL. */
317 def_list_add (def_list_t
*dl
, insn_t original_insn
, bool crosses_call
)
322 d
= DEF_LIST_DEF (*dl
);
324 d
->orig_insn
= original_insn
;
325 d
->crosses_call
= crosses_call
;
329 /* Functions to work with target contexts. */
331 /* Bulk target context. It is convenient for debugging purposes to ensure
332 that there are no uninitialized (null) target contexts. */
333 static tc_t bulk_tc
= (tc_t
) 1;
335 /* Target hooks wrappers. In the future we can provide some default
336 implementations for them. */
338 /* Allocate a store for the target context. */
340 alloc_target_context (void)
342 return (targetm
.sched
.alloc_sched_context
343 ? targetm
.sched
.alloc_sched_context () : bulk_tc
);
346 /* Init target context TC.
347 If CLEAN_P is true, then make TC as it is beginning of the scheduler.
348 Overwise, copy current backend context to TC. */
350 init_target_context (tc_t tc
, bool clean_p
)
352 if (targetm
.sched
.init_sched_context
)
353 targetm
.sched
.init_sched_context (tc
, clean_p
);
356 /* Allocate and initialize a target context. Meaning of CLEAN_P is the same as
357 int init_target_context (). */
359 create_target_context (bool clean_p
)
361 tc_t tc
= alloc_target_context ();
363 init_target_context (tc
, clean_p
);
367 /* Copy TC to the current backend context. */
369 set_target_context (tc_t tc
)
371 if (targetm
.sched
.set_sched_context
)
372 targetm
.sched
.set_sched_context (tc
);
375 /* TC is about to be destroyed. Free any internal data. */
377 clear_target_context (tc_t tc
)
379 if (targetm
.sched
.clear_sched_context
)
380 targetm
.sched
.clear_sched_context (tc
);
383 /* Clear and free it. */
385 delete_target_context (tc_t tc
)
387 clear_target_context (tc
);
389 if (targetm
.sched
.free_sched_context
)
390 targetm
.sched
.free_sched_context (tc
);
393 /* Make a copy of FROM in TO.
394 NB: May be this should be a hook. */
396 copy_target_context (tc_t to
, tc_t from
)
398 tc_t tmp
= create_target_context (false);
400 set_target_context (from
);
401 init_target_context (to
, false);
403 set_target_context (tmp
);
404 delete_target_context (tmp
);
407 /* Create a copy of TC. */
409 create_copy_of_target_context (tc_t tc
)
411 tc_t copy
= alloc_target_context ();
413 copy_target_context (copy
, tc
);
418 /* Clear TC and initialize it according to CLEAN_P. The meaning of CLEAN_P
419 is the same as in init_target_context (). */
421 reset_target_context (tc_t tc
, bool clean_p
)
423 clear_target_context (tc
);
424 init_target_context (tc
, clean_p
);
427 /* Functions to work with dependence contexts.
428 Dc (aka deps context, aka deps_t, aka struct deps *) is short for dependence
429 context. It accumulates information about processed insns to decide if
430 current insn is dependent on the processed ones. */
432 /* Make a copy of FROM in TO. */
434 copy_deps_context (deps_t to
, deps_t from
)
436 init_deps (to
, false);
437 deps_join (to
, from
);
440 /* Allocate store for dep context. */
442 alloc_deps_context (void)
444 return XNEW (struct deps
);
447 /* Allocate and initialize dep context. */
449 create_deps_context (void)
451 deps_t dc
= alloc_deps_context ();
453 init_deps (dc
, false);
457 /* Create a copy of FROM. */
459 create_copy_of_deps_context (deps_t from
)
461 deps_t to
= alloc_deps_context ();
463 copy_deps_context (to
, from
);
467 /* Clean up internal data of DC. */
469 clear_deps_context (deps_t dc
)
474 /* Clear and free DC. */
476 delete_deps_context (deps_t dc
)
478 clear_deps_context (dc
);
482 /* Clear and init DC. */
484 reset_deps_context (deps_t dc
)
486 clear_deps_context (dc
);
487 init_deps (dc
, false);
490 /* This structure describes the dependence analysis hooks for advancing
491 dependence context. */
492 static struct sched_deps_info_def advance_deps_context_sched_deps_info
=
496 NULL
, /* start_insn */
497 NULL
, /* finish_insn */
498 NULL
, /* start_lhs */
499 NULL
, /* finish_lhs */
500 NULL
, /* start_rhs */
501 NULL
, /* finish_rhs */
503 haifa_note_reg_clobber
,
505 NULL
, /* note_mem_dep */
511 /* Process INSN and add its impact on DC. */
513 advance_deps_context (deps_t dc
, insn_t insn
)
515 sched_deps_info
= &advance_deps_context_sched_deps_info
;
516 deps_analyze_insn (dc
, insn
);
520 /* Functions to work with DFA states. */
522 /* Allocate store for a DFA state. */
526 return xmalloc (dfa_state_size
);
529 /* Allocate and initialize DFA state. */
533 state_t state
= state_alloc ();
536 advance_state (state
);
540 /* Free DFA state. */
542 state_free (state_t state
)
547 /* Make a copy of FROM in TO. */
549 state_copy (state_t to
, state_t from
)
551 memcpy (to
, from
, dfa_state_size
);
554 /* Create a copy of FROM. */
556 state_create_copy (state_t from
)
558 state_t to
= state_alloc ();
560 state_copy (to
, from
);
565 /* Functions to work with fences. */
567 /* Clear the fence. */
569 fence_clear (fence_t f
)
571 state_t s
= FENCE_STATE (f
);
572 deps_t dc
= FENCE_DC (f
);
573 void *tc
= FENCE_TC (f
);
575 ilist_clear (&FENCE_BNDS (f
));
577 gcc_assert ((s
!= NULL
&& dc
!= NULL
&& tc
!= NULL
)
578 || (s
== NULL
&& dc
== NULL
&& tc
== NULL
));
584 delete_deps_context (dc
);
587 delete_target_context (tc
);
588 VEC_free (rtx
, gc
, FENCE_EXECUTING_INSNS (f
));
589 free (FENCE_READY_TICKS (f
));
590 FENCE_READY_TICKS (f
) = NULL
;
593 /* Init a list of fences with successors of OLD_FENCE. */
595 init_fences (insn_t old_fence
)
600 int ready_ticks_size
= get_max_uid () + 1;
602 FOR_EACH_SUCC_1 (succ
, si
, old_fence
,
603 SUCCS_NORMAL
| SUCCS_SKIP_TO_LOOP_EXITS
)
609 gcc_assert (flag_sel_sched_pipelining_outer_loops
);
611 flist_add (&fences
, succ
,
613 create_deps_context () /* dc */,
614 create_target_context (true) /* tc */,
615 NULL_RTX
/* last_scheduled_insn */,
616 NULL
, /* executing_insns */
617 XCNEWVEC (int, ready_ticks_size
), /* ready_ticks */
619 NULL_RTX
/* sched_next */,
620 1 /* cycle */, 0 /* cycle_issued_insns */,
621 1 /* starts_cycle_p */, 0 /* after_stall_p */);
625 /* Merges two fences (filling fields of fence F with resulting values) by
626 following rules: 1) state, target context and last scheduled insn are
627 propagated from fallthrough edge if it is available;
628 2) deps context and cycle is propagated from more probable edge;
629 3) all other fields are set to corresponding constant values.
631 INSN, STATE, DC, TC, LAST_SCHEDULED_INSN, EXECUTING_INSNS,
632 READY_TICKS, READY_TICKS_SIZE, SCHED_NEXT, CYCLE and AFTER_STALL_P
633 are the corresponding fields of the second fence. */
635 merge_fences (fence_t f
, insn_t insn
,
636 state_t state
, deps_t dc
, void *tc
,
637 rtx last_scheduled_insn
, VEC(rtx
, gc
) *executing_insns
,
638 int *ready_ticks
, int ready_ticks_size
,
639 rtx sched_next
, int cycle
, bool after_stall_p
)
641 insn_t last_scheduled_insn_old
= FENCE_LAST_SCHEDULED_INSN (f
);
643 gcc_assert (sel_bb_head_p (FENCE_INSN (f
))
644 && !sched_next
&& !FENCE_SCHED_NEXT (f
));
646 /* Check if we can decide which path fences came.
647 If we can't (or don't want to) - reset all. */
648 if (last_scheduled_insn
== NULL
649 || last_scheduled_insn_old
== NULL
650 /* This is a case when INSN is reachable on several paths from
651 one insn (this can happen when pipelining of outer loops is on and
652 there are two edges: one going around of inner loop and the other -
653 right through it; in such case just reset everything). */
654 || last_scheduled_insn
== last_scheduled_insn_old
)
656 state_reset (FENCE_STATE (f
));
659 reset_deps_context (FENCE_DC (f
));
660 delete_deps_context (dc
);
662 reset_target_context (FENCE_TC (f
), true);
663 delete_target_context (tc
);
665 if (cycle
> FENCE_CYCLE (f
))
666 FENCE_CYCLE (f
) = cycle
;
668 FENCE_LAST_SCHEDULED_INSN (f
) = NULL
;
669 VEC_free (rtx
, gc
, executing_insns
);
671 if (FENCE_EXECUTING_INSNS (f
))
672 VEC_block_remove (rtx
, FENCE_EXECUTING_INSNS (f
), 0,
673 VEC_length (rtx
, FENCE_EXECUTING_INSNS (f
)));
674 if (FENCE_READY_TICKS (f
))
675 memset (FENCE_READY_TICKS (f
), 0, FENCE_READY_TICKS_SIZE (f
));
679 edge edge_old
= NULL
, edge_new
= NULL
;
684 /* Find fallthrough edge. */
685 gcc_assert (BLOCK_FOR_INSN (insn
)->prev_bb
);
686 candidate
= find_fallthru_edge (BLOCK_FOR_INSN (insn
)->prev_bb
);
689 || (candidate
->src
!= BLOCK_FOR_INSN (last_scheduled_insn
)
690 && candidate
->src
!= BLOCK_FOR_INSN (last_scheduled_insn_old
)))
692 /* No fallthrough edge leading to basic block of INSN. */
693 state_reset (FENCE_STATE (f
));
696 reset_target_context (FENCE_TC (f
), true);
697 delete_target_context (tc
);
699 FENCE_LAST_SCHEDULED_INSN (f
) = NULL
;
702 if (candidate
->src
== BLOCK_FOR_INSN (last_scheduled_insn
))
704 /* Would be weird if same insn is successor of several fallthrough
706 gcc_assert (BLOCK_FOR_INSN (insn
)->prev_bb
707 != BLOCK_FOR_INSN (last_scheduled_insn_old
));
709 state_free (FENCE_STATE (f
));
710 FENCE_STATE (f
) = state
;
712 delete_target_context (FENCE_TC (f
));
715 FENCE_LAST_SCHEDULED_INSN (f
) = last_scheduled_insn
;
719 /* Leave STATE, TC and LAST_SCHEDULED_INSN fields untouched. */
721 delete_target_context (tc
);
723 gcc_assert (BLOCK_FOR_INSN (insn
)->prev_bb
724 != BLOCK_FOR_INSN (last_scheduled_insn
));
727 /* Find edge of first predecessor (last_scheduled_insn_old->insn). */
728 FOR_EACH_SUCC_1 (succ
, si
, last_scheduled_insn_old
,
729 SUCCS_NORMAL
| SUCCS_SKIP_TO_LOOP_EXITS
)
733 /* No same successor allowed from several edges. */
734 gcc_assert (!edge_old
);
738 /* Find edge of second predecessor (last_scheduled_insn->insn). */
739 FOR_EACH_SUCC_1 (succ
, si
, last_scheduled_insn
,
740 SUCCS_NORMAL
| SUCCS_SKIP_TO_LOOP_EXITS
)
744 /* No same successor allowed from several edges. */
745 gcc_assert (!edge_new
);
750 /* Check if we can choose most probable predecessor. */
751 if (edge_old
== NULL
|| edge_new
== NULL
)
753 reset_deps_context (FENCE_DC (f
));
754 delete_deps_context (dc
);
755 VEC_free (rtx
, gc
, executing_insns
);
758 FENCE_CYCLE (f
) = MAX (FENCE_CYCLE (f
), cycle
);
759 if (FENCE_EXECUTING_INSNS (f
))
760 VEC_block_remove (rtx
, FENCE_EXECUTING_INSNS (f
), 0,
761 VEC_length (rtx
, FENCE_EXECUTING_INSNS (f
)));
762 if (FENCE_READY_TICKS (f
))
763 memset (FENCE_READY_TICKS (f
), 0, FENCE_READY_TICKS_SIZE (f
));
766 if (edge_new
->probability
> edge_old
->probability
)
768 delete_deps_context (FENCE_DC (f
));
770 VEC_free (rtx
, gc
, FENCE_EXECUTING_INSNS (f
));
771 FENCE_EXECUTING_INSNS (f
) = executing_insns
;
772 free (FENCE_READY_TICKS (f
));
773 FENCE_READY_TICKS (f
) = ready_ticks
;
774 FENCE_READY_TICKS_SIZE (f
) = ready_ticks_size
;
775 FENCE_CYCLE (f
) = cycle
;
779 /* Leave DC and CYCLE untouched. */
780 delete_deps_context (dc
);
781 VEC_free (rtx
, gc
, executing_insns
);
786 /* Fill remaining invariant fields. */
788 FENCE_AFTER_STALL_P (f
) = 1;
790 FENCE_ISSUED_INSNS (f
) = 0;
791 FENCE_STARTS_CYCLE_P (f
) = 1;
792 FENCE_SCHED_NEXT (f
) = NULL
;
795 /* Add a new fence to NEW_FENCES list, initializing it from all
798 add_to_fences (flist_tail_t new_fences
, insn_t insn
,
799 state_t state
, deps_t dc
, void *tc
, rtx last_scheduled_insn
,
800 VEC(rtx
, gc
) *executing_insns
, int *ready_ticks
,
801 int ready_ticks_size
, rtx sched_next
, int cycle
,
802 int cycle_issued_insns
, bool starts_cycle_p
, bool after_stall_p
)
804 fence_t f
= flist_lookup (FLIST_TAIL_HEAD (new_fences
), insn
);
808 flist_add (FLIST_TAIL_TAILP (new_fences
), insn
, state
, dc
, tc
,
809 last_scheduled_insn
, executing_insns
, ready_ticks
,
810 ready_ticks_size
, sched_next
, cycle
, cycle_issued_insns
,
811 starts_cycle_p
, after_stall_p
);
813 FLIST_TAIL_TAILP (new_fences
)
814 = &FLIST_NEXT (*FLIST_TAIL_TAILP (new_fences
));
818 merge_fences (f
, insn
, state
, dc
, tc
, last_scheduled_insn
,
819 executing_insns
, ready_ticks
, ready_ticks_size
,
820 sched_next
, cycle
, after_stall_p
);
824 /* Move the first fence in the OLD_FENCES list to NEW_FENCES. */
826 move_fence_to_fences (flist_t old_fences
, flist_tail_t new_fences
)
829 flist_t
*tailp
= FLIST_TAIL_TAILP (new_fences
);
831 old
= FLIST_FENCE (old_fences
);
832 f
= flist_lookup (FLIST_TAIL_HEAD (new_fences
),
833 FENCE_INSN (FLIST_FENCE (old_fences
)));
836 merge_fences (f
, old
->insn
, old
->state
, old
->dc
, old
->tc
,
837 old
->last_scheduled_insn
, old
->executing_insns
,
838 old
->ready_ticks
, old
->ready_ticks_size
,
839 old
->sched_next
, old
->cycle
,
845 FLIST_TAIL_TAILP (new_fences
) = &FLIST_NEXT (*tailp
);
846 *FLIST_FENCE (*tailp
) = *old
;
847 init_fence_for_scheduling (FLIST_FENCE (*tailp
));
849 FENCE_INSN (old
) = NULL
;
852 /* Add a new fence to NEW_FENCES list and initialize most of its data
855 add_clean_fence_to_fences (flist_tail_t new_fences
, insn_t succ
, fence_t fence
)
857 int ready_ticks_size
= get_max_uid () + 1;
859 add_to_fences (new_fences
,
860 succ
, state_create (), create_deps_context (),
861 create_target_context (true),
863 XCNEWVEC (int, ready_ticks_size
), ready_ticks_size
,
864 NULL_RTX
, FENCE_CYCLE (fence
) + 1,
865 0, 1, FENCE_AFTER_STALL_P (fence
));
868 /* Add a new fence to NEW_FENCES list and initialize all of its data
869 from FENCE and SUCC. */
871 add_dirty_fence_to_fences (flist_tail_t new_fences
, insn_t succ
, fence_t fence
)
873 int * new_ready_ticks
874 = XNEWVEC (int, FENCE_READY_TICKS_SIZE (fence
));
876 memcpy (new_ready_ticks
, FENCE_READY_TICKS (fence
),
877 FENCE_READY_TICKS_SIZE (fence
) * sizeof (int));
878 add_to_fences (new_fences
,
879 succ
, state_create_copy (FENCE_STATE (fence
)),
880 create_copy_of_deps_context (FENCE_DC (fence
)),
881 create_copy_of_target_context (FENCE_TC (fence
)),
882 FENCE_LAST_SCHEDULED_INSN (fence
),
883 VEC_copy (rtx
, gc
, FENCE_EXECUTING_INSNS (fence
)),
885 FENCE_READY_TICKS_SIZE (fence
),
886 FENCE_SCHED_NEXT (fence
),
888 FENCE_ISSUED_INSNS (fence
),
889 FENCE_STARTS_CYCLE_P (fence
),
890 FENCE_AFTER_STALL_P (fence
));
894 /* Functions to work with regset and nop pools. */
896 /* Returns the new regset from pool. It might have some of the bits set
897 from the previous usage. */
899 get_regset_from_pool (void)
903 if (regset_pool
.n
!= 0)
904 rs
= regset_pool
.v
[--regset_pool
.n
];
906 /* We need to create the regset. */
908 rs
= ALLOC_REG_SET (®_obstack
);
910 if (regset_pool
.nn
== regset_pool
.ss
)
911 regset_pool
.vv
= XRESIZEVEC (regset
, regset_pool
.vv
,
912 (regset_pool
.ss
= 2 * regset_pool
.ss
+ 1));
913 regset_pool
.vv
[regset_pool
.nn
++] = rs
;
921 /* Same as above, but returns the empty regset. */
923 get_clear_regset_from_pool (void)
925 regset rs
= get_regset_from_pool ();
931 /* Return regset RS to the pool for future use. */
933 return_regset_to_pool (regset rs
)
937 if (regset_pool
.n
== regset_pool
.s
)
938 regset_pool
.v
= XRESIZEVEC (regset
, regset_pool
.v
,
939 (regset_pool
.s
= 2 * regset_pool
.s
+ 1));
940 regset_pool
.v
[regset_pool
.n
++] = rs
;
943 #ifdef ENABLE_CHECKING
944 /* This is used as a qsort callback for sorting regset pool stacks.
945 X and XX are addresses of two regsets. They are never equal. */
947 cmp_v_in_regset_pool (const void *x
, const void *xx
)
949 return *((const regset
*) x
) - *((const regset
*) xx
);
953 /* Free the regset pool possibly checking for memory leaks. */
955 free_regset_pool (void)
957 #ifdef ENABLE_CHECKING
959 regset
*v
= regset_pool
.v
;
961 int n
= regset_pool
.n
;
963 regset
*vv
= regset_pool
.vv
;
965 int nn
= regset_pool
.nn
;
969 gcc_assert (n
<= nn
);
971 /* Sort both vectors so it will be possible to compare them. */
972 qsort (v
, n
, sizeof (*v
), cmp_v_in_regset_pool
);
973 qsort (vv
, nn
, sizeof (*vv
), cmp_v_in_regset_pool
);
980 /* VV[II] was lost. */
986 gcc_assert (diff
== regset_pool
.diff
);
990 /* If not true - we have a memory leak. */
991 gcc_assert (regset_pool
.diff
== 0);
993 while (regset_pool
.n
)
996 FREE_REG_SET (regset_pool
.v
[regset_pool
.n
]);
999 free (regset_pool
.v
);
1000 regset_pool
.v
= NULL
;
1003 free (regset_pool
.vv
);
1004 regset_pool
.vv
= NULL
;
1008 regset_pool
.diff
= 0;
1012 /* Functions to work with nop pools. NOP insns are used as temporary
1013 placeholders of the insns being scheduled to allow correct update of
1014 the data sets. When update is finished, NOPs are deleted. */
1016 /* A vinsn that is used to represent a nop. This vinsn is shared among all
1017 nops sel-sched generates. */
1018 static vinsn_t nop_vinsn
= NULL
;
1020 /* Emit a nop before INSN, taking it from pool. */
1022 get_nop_from_pool (insn_t insn
)
1025 bool old_p
= nop_pool
.n
!= 0;
1029 nop
= nop_pool
.v
[--nop_pool
.n
];
1033 nop
= emit_insn_before (nop
, insn
);
1036 flags
= INSN_INIT_TODO_SSID
;
1038 flags
= INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SSID
;
1040 set_insn_init (INSN_EXPR (insn
), nop_vinsn
, INSN_SEQNO (insn
));
1041 sel_init_new_insn (nop
, flags
);
1046 /* Remove NOP from the instruction stream and return it to the pool. */
1048 return_nop_to_pool (insn_t nop
, bool full_tidying
)
1050 gcc_assert (INSN_IN_STREAM_P (nop
));
1051 sel_remove_insn (nop
, false, full_tidying
);
1053 if (nop_pool
.n
== nop_pool
.s
)
1054 nop_pool
.v
= XRESIZEVEC (rtx
, nop_pool
.v
,
1055 (nop_pool
.s
= 2 * nop_pool
.s
+ 1));
1056 nop_pool
.v
[nop_pool
.n
++] = nop
;
1059 /* Free the nop pool. */
1061 free_nop_pool (void)
1070 /* Skip unspec to support ia64 speculation. Called from rtx_equal_p_cb.
1071 The callback is given two rtxes XX and YY and writes the new rtxes
1072 to NX and NY in case some needs to be skipped. */
1074 skip_unspecs_callback (const_rtx
*xx
, const_rtx
*yy
, rtx
*nx
, rtx
* ny
)
1079 if (GET_CODE (x
) == UNSPEC
1080 && (targetm
.sched
.skip_rtx_p
== NULL
1081 || targetm
.sched
.skip_rtx_p (x
)))
1083 *nx
= XVECEXP (x
, 0, 0);
1084 *ny
= CONST_CAST_RTX (y
);
1088 if (GET_CODE (y
) == UNSPEC
1089 && (targetm
.sched
.skip_rtx_p
== NULL
1090 || targetm
.sched
.skip_rtx_p (y
)))
1092 *nx
= CONST_CAST_RTX (x
);
1093 *ny
= XVECEXP (y
, 0, 0);
1100 /* Callback, called from hash_rtx_cb. Helps to hash UNSPEC rtx X in a correct way
1101 to support ia64 speculation. When changes are needed, new rtx X and new mode
1102 NMODE are written, and the callback returns true. */
1104 hash_with_unspec_callback (const_rtx x
, enum machine_mode mode ATTRIBUTE_UNUSED
,
1105 rtx
*nx
, enum machine_mode
* nmode
)
1107 if (GET_CODE (x
) == UNSPEC
1108 && targetm
.sched
.skip_rtx_p
1109 && targetm
.sched
.skip_rtx_p (x
))
1111 *nx
= XVECEXP (x
, 0 ,0);
1119 /* Returns LHS and RHS are ok to be scheduled separately. */
1121 lhs_and_rhs_separable_p (rtx lhs
, rtx rhs
)
1123 if (lhs
== NULL
|| rhs
== NULL
)
1126 /* Do not schedule CONST, CONST_INT and CONST_DOUBLE etc as rhs: no point
1127 to use reg, if const can be used. Moreover, scheduling const as rhs may
1128 lead to mode mismatch cause consts don't have modes but they could be
1129 merged from branches where the same const used in different modes. */
1130 if (CONSTANT_P (rhs
))
1133 /* ??? Do not rename predicate registers to avoid ICEs in bundling. */
1134 if (COMPARISON_P (rhs
))
1137 /* Do not allow single REG to be an rhs. */
1141 /* See comment at find_used_regs_1 (*1) for explanation of this
1143 /* FIXME: remove this later. */
1147 /* This will filter all tricky things like ZERO_EXTRACT etc.
1148 For now we don't handle it. */
1149 if (!REG_P (lhs
) && !MEM_P (lhs
))
1155 /* Initialize vinsn VI for INSN. Only for use from vinsn_create (). When
1156 FORCE_UNIQUE_P is true, the resulting vinsn will not be clonable. This is
1157 used e.g. for insns from recovery blocks. */
1159 vinsn_init (vinsn_t vi
, insn_t insn
, bool force_unique_p
)
1161 hash_rtx_callback_function hrcf
;
1164 VINSN_INSN_RTX (vi
) = insn
;
1165 VINSN_COUNT (vi
) = 0;
1168 if (DF_INSN_UID_SAFE_GET (INSN_UID (insn
)) != NULL
)
1169 init_id_from_df (VINSN_ID (vi
), insn
, force_unique_p
);
1171 deps_init_id (VINSN_ID (vi
), insn
, force_unique_p
);
1173 /* Hash vinsn depending on whether it is separable or not. */
1174 hrcf
= targetm
.sched
.skip_rtx_p
? hash_with_unspec_callback
: NULL
;
1175 if (VINSN_SEPARABLE_P (vi
))
1177 rtx rhs
= VINSN_RHS (vi
);
1179 VINSN_HASH (vi
) = hash_rtx_cb (rhs
, GET_MODE (rhs
),
1180 NULL
, NULL
, false, hrcf
);
1181 VINSN_HASH_RTX (vi
) = hash_rtx_cb (VINSN_PATTERN (vi
),
1182 VOIDmode
, NULL
, NULL
,
1187 VINSN_HASH (vi
) = hash_rtx_cb (VINSN_PATTERN (vi
), VOIDmode
,
1188 NULL
, NULL
, false, hrcf
);
1189 VINSN_HASH_RTX (vi
) = VINSN_HASH (vi
);
1192 insn_class
= haifa_classify_insn (insn
);
1194 && (!targetm
.sched
.get_insn_spec_ds
1195 || ((targetm
.sched
.get_insn_spec_ds (insn
) & BEGIN_CONTROL
)
1197 VINSN_MAY_TRAP_P (vi
) = true;
1199 VINSN_MAY_TRAP_P (vi
) = false;
1202 /* Indicate that VI has become the part of an rtx object. */
1204 vinsn_attach (vinsn_t vi
)
1206 /* Assert that VI is not pending for deletion. */
1207 gcc_assert (VINSN_INSN_RTX (vi
));
1212 /* Create and init VI from the INSN. Use UNIQUE_P for determining the correct
1215 vinsn_create (insn_t insn
, bool force_unique_p
)
1217 vinsn_t vi
= XCNEW (struct vinsn_def
);
1219 vinsn_init (vi
, insn
, force_unique_p
);
1223 /* Return a copy of VI. When REATTACH_P is true, detach VI and attach
1226 vinsn_copy (vinsn_t vi
, bool reattach_p
)
1229 bool unique
= VINSN_UNIQUE_P (vi
);
1232 copy
= create_copy_of_insn_rtx (VINSN_INSN_RTX (vi
));
1233 new_vi
= create_vinsn_from_insn_rtx (copy
, unique
);
1237 vinsn_attach (new_vi
);
1243 /* Delete the VI vinsn and free its data. */
1245 vinsn_delete (vinsn_t vi
)
1247 gcc_assert (VINSN_COUNT (vi
) == 0);
1249 return_regset_to_pool (VINSN_REG_SETS (vi
));
1250 return_regset_to_pool (VINSN_REG_USES (vi
));
1251 return_regset_to_pool (VINSN_REG_CLOBBERS (vi
));
1256 /* Indicate that VI is no longer a part of some rtx object.
1257 Remove VI if it is no longer needed. */
1259 vinsn_detach (vinsn_t vi
)
1261 gcc_assert (VINSN_COUNT (vi
) > 0);
1263 if (--VINSN_COUNT (vi
) == 0)
1267 /* Returns TRUE if VI is a branch. */
1269 vinsn_cond_branch_p (vinsn_t vi
)
1273 if (!VINSN_UNIQUE_P (vi
))
1276 insn
= VINSN_INSN_RTX (vi
);
1277 if (BB_END (BLOCK_FOR_INSN (insn
)) != insn
)
1280 return control_flow_insn_p (insn
);
1283 /* Return latency of INSN. */
1285 sel_insn_rtx_cost (rtx insn
)
1289 /* A USE insn, or something else we don't need to
1290 understand. We can't pass these directly to
1291 result_ready_cost or insn_default_latency because it will
1292 trigger a fatal error for unrecognizable insns. */
1293 if (recog_memoized (insn
) < 0)
1297 cost
= insn_default_latency (insn
);
1306 /* Return the cost of the VI.
1307 !!! FIXME: Unify with haifa-sched.c: insn_cost (). */
1309 sel_vinsn_cost (vinsn_t vi
)
1311 int cost
= vi
->cost
;
1315 cost
= sel_insn_rtx_cost (VINSN_INSN_RTX (vi
));
1323 /* Functions for insn emitting. */
1325 /* Emit new insn after AFTER based on PATTERN and initialize its data from
1328 sel_gen_insn_from_rtx_after (rtx pattern
, expr_t expr
, int seqno
, insn_t after
)
1332 gcc_assert (EXPR_TARGET_AVAILABLE (expr
) == true);
1334 new_insn
= emit_insn_after (pattern
, after
);
1335 set_insn_init (expr
, NULL
, seqno
);
1336 sel_init_new_insn (new_insn
, INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SSID
);
1341 /* Force newly generated vinsns to be unique. */
1342 static bool init_insn_force_unique_p
= false;
1344 /* Emit new speculation recovery insn after AFTER based on PATTERN and
1345 initialize its data from EXPR and SEQNO. */
1347 sel_gen_recovery_insn_from_rtx_after (rtx pattern
, expr_t expr
, int seqno
,
1352 gcc_assert (!init_insn_force_unique_p
);
1354 init_insn_force_unique_p
= true;
1355 insn
= sel_gen_insn_from_rtx_after (pattern
, expr
, seqno
, after
);
1356 CANT_MOVE (insn
) = 1;
1357 init_insn_force_unique_p
= false;
1362 /* Emit new insn after AFTER based on EXPR and SEQNO. If VINSN is not NULL,
1363 take it as a new vinsn instead of EXPR's vinsn.
1364 We simplify insns later, after scheduling region in
1365 simplify_changed_insns. */
1367 sel_gen_insn_from_expr_after (expr_t expr
, vinsn_t vinsn
, int seqno
,
1374 emit_expr
= set_insn_init (expr
, vinsn
? vinsn
: EXPR_VINSN (expr
),
1376 insn
= EXPR_INSN_RTX (emit_expr
);
1377 add_insn_after (insn
, after
, BLOCK_FOR_INSN (insn
));
1379 flags
= INSN_INIT_TODO_SSID
;
1380 if (INSN_LUID (insn
) == 0)
1381 flags
|= INSN_INIT_TODO_LUID
;
1382 sel_init_new_insn (insn
, flags
);
1387 /* Move insn from EXPR after AFTER. */
1389 sel_move_insn (expr_t expr
, int seqno
, insn_t after
)
1391 insn_t insn
= EXPR_INSN_RTX (expr
);
1392 basic_block bb
= BLOCK_FOR_INSN (after
);
1393 insn_t next
= NEXT_INSN (after
);
1395 /* Assert that in move_op we disconnected this insn properly. */
1396 gcc_assert (EXPR_VINSN (INSN_EXPR (insn
)) != NULL
);
1397 PREV_INSN (insn
) = after
;
1398 NEXT_INSN (insn
) = next
;
1400 NEXT_INSN (after
) = insn
;
1401 PREV_INSN (next
) = insn
;
1403 /* Update links from insn to bb and vice versa. */
1404 df_insn_change_bb (insn
, bb
);
1405 if (BB_END (bb
) == after
)
1408 prepare_insn_expr (insn
, seqno
);
1413 /* Functions to work with right-hand sides. */
1415 /* Search for a hash value determined by UID/NEW_VINSN in a sorted vector
1416 VECT and return true when found. Use NEW_VINSN for comparison only when
1417 COMPARE_VINSNS is true. Write to INDP the index on which
1418 the search has stopped, such that inserting the new element at INDP will
1419 retain VECT's sort order. */
1421 find_in_history_vect_1 (VEC(expr_history_def
, heap
) *vect
,
1422 unsigned uid
, vinsn_t new_vinsn
,
1423 bool compare_vinsns
, int *indp
)
1425 expr_history_def
*arr
;
1426 int i
, j
, len
= VEC_length (expr_history_def
, vect
);
1434 arr
= VEC_address (expr_history_def
, vect
);
1439 unsigned auid
= arr
[i
].uid
;
1440 vinsn_t avinsn
= arr
[i
].new_expr_vinsn
;
1443 /* When undoing transformation on a bookkeeping copy, the new vinsn
1444 may not be exactly equal to the one that is saved in the vector.
1445 This is because the insn whose copy we're checking was possibly
1446 substituted itself. */
1447 && (! compare_vinsns
1448 || vinsn_equal_p (avinsn
, new_vinsn
)))
1453 else if (auid
> uid
)
1462 /* Search for a uid of INSN and NEW_VINSN in a sorted vector VECT. Return
1463 the position found or -1, if no such value is in vector.
1464 Search also for UIDs of insn's originators, if ORIGINATORS_P is true. */
1466 find_in_history_vect (VEC(expr_history_def
, heap
) *vect
, rtx insn
,
1467 vinsn_t new_vinsn
, bool originators_p
)
1471 if (find_in_history_vect_1 (vect
, INSN_UID (insn
), new_vinsn
,
1475 if (INSN_ORIGINATORS (insn
) && originators_p
)
1480 EXECUTE_IF_SET_IN_BITMAP (INSN_ORIGINATORS (insn
), 0, uid
, bi
)
1481 if (find_in_history_vect_1 (vect
, uid
, new_vinsn
, false, &ind
))
1488 /* Insert new element in a sorted history vector pointed to by PVECT,
1489 if it is not there already. The element is searched using
1490 UID/NEW_EXPR_VINSN pair. TYPE, OLD_EXPR_VINSN and SPEC_DS save
1491 the history of a transformation. */
1493 insert_in_history_vect (VEC (expr_history_def
, heap
) **pvect
,
1494 unsigned uid
, enum local_trans_type type
,
1495 vinsn_t old_expr_vinsn
, vinsn_t new_expr_vinsn
,
1498 VEC(expr_history_def
, heap
) *vect
= *pvect
;
1499 expr_history_def temp
;
1503 res
= find_in_history_vect_1 (vect
, uid
, new_expr_vinsn
, true, &ind
);
1507 expr_history_def
*phist
= VEC_index (expr_history_def
, vect
, ind
);
1509 /* It is possible that speculation types of expressions that were
1510 propagated through different paths will be different here. In this
1511 case, merge the status to get the correct check later. */
1512 if (phist
->spec_ds
!= spec_ds
)
1513 phist
->spec_ds
= ds_max_merge (phist
->spec_ds
, spec_ds
);
1518 temp
.old_expr_vinsn
= old_expr_vinsn
;
1519 temp
.new_expr_vinsn
= new_expr_vinsn
;
1520 temp
.spec_ds
= spec_ds
;
1523 vinsn_attach (old_expr_vinsn
);
1524 vinsn_attach (new_expr_vinsn
);
1525 VEC_safe_insert (expr_history_def
, heap
, vect
, ind
, &temp
);
1529 /* Free history vector PVECT. */
1531 free_history_vect (VEC (expr_history_def
, heap
) **pvect
)
1534 expr_history_def
*phist
;
1540 VEC_iterate (expr_history_def
, *pvect
, i
, phist
);
1543 vinsn_detach (phist
->old_expr_vinsn
);
1544 vinsn_detach (phist
->new_expr_vinsn
);
1547 VEC_free (expr_history_def
, heap
, *pvect
);
1552 /* Compare two vinsns as rhses if possible and as vinsns otherwise. */
1554 vinsn_equal_p (vinsn_t x
, vinsn_t y
)
1556 rtx_equal_p_callback_function repcf
;
1561 if (VINSN_TYPE (x
) != VINSN_TYPE (y
))
1564 if (VINSN_HASH (x
) != VINSN_HASH (y
))
1567 repcf
= targetm
.sched
.skip_rtx_p
? skip_unspecs_callback
: NULL
;
1568 if (VINSN_SEPARABLE_P (x
))
1570 /* Compare RHSes of VINSNs. */
1571 gcc_assert (VINSN_RHS (x
));
1572 gcc_assert (VINSN_RHS (y
));
1574 return rtx_equal_p_cb (VINSN_RHS (x
), VINSN_RHS (y
), repcf
);
1577 return rtx_equal_p_cb (VINSN_PATTERN (x
), VINSN_PATTERN (y
), repcf
);
1581 /* Functions for working with expressions. */
1583 /* Initialize EXPR. */
1585 init_expr (expr_t expr
, vinsn_t vi
, int spec
, int use
, int priority
,
1586 int sched_times
, int orig_bb_index
, ds_t spec_done_ds
,
1587 ds_t spec_to_check_ds
, int orig_sched_cycle
,
1588 VEC(expr_history_def
, heap
) *history
, bool target_available
,
1589 bool was_substituted
, bool was_renamed
, bool needs_spec_check_p
,
1594 EXPR_VINSN (expr
) = vi
;
1595 EXPR_SPEC (expr
) = spec
;
1596 EXPR_USEFULNESS (expr
) = use
;
1597 EXPR_PRIORITY (expr
) = priority
;
1598 EXPR_PRIORITY_ADJ (expr
) = 0;
1599 EXPR_SCHED_TIMES (expr
) = sched_times
;
1600 EXPR_ORIG_BB_INDEX (expr
) = orig_bb_index
;
1601 EXPR_ORIG_SCHED_CYCLE (expr
) = orig_sched_cycle
;
1602 EXPR_SPEC_DONE_DS (expr
) = spec_done_ds
;
1603 EXPR_SPEC_TO_CHECK_DS (expr
) = spec_to_check_ds
;
1606 EXPR_HISTORY_OF_CHANGES (expr
) = history
;
1608 EXPR_HISTORY_OF_CHANGES (expr
) = NULL
;
1610 EXPR_TARGET_AVAILABLE (expr
) = target_available
;
1611 EXPR_WAS_SUBSTITUTED (expr
) = was_substituted
;
1612 EXPR_WAS_RENAMED (expr
) = was_renamed
;
1613 EXPR_NEEDS_SPEC_CHECK_P (expr
) = needs_spec_check_p
;
1614 EXPR_CANT_MOVE (expr
) = cant_move
;
1617 /* Make a copy of the expr FROM into the expr TO. */
1619 copy_expr (expr_t to
, expr_t from
)
1621 VEC(expr_history_def
, heap
) *temp
= NULL
;
1623 if (EXPR_HISTORY_OF_CHANGES (from
))
1626 expr_history_def
*phist
;
1628 temp
= VEC_copy (expr_history_def
, heap
, EXPR_HISTORY_OF_CHANGES (from
));
1630 VEC_iterate (expr_history_def
, temp
, i
, phist
);
1633 vinsn_attach (phist
->old_expr_vinsn
);
1634 vinsn_attach (phist
->new_expr_vinsn
);
1638 init_expr (to
, EXPR_VINSN (from
), EXPR_SPEC (from
),
1639 EXPR_USEFULNESS (from
), EXPR_PRIORITY (from
),
1640 EXPR_SCHED_TIMES (from
), EXPR_ORIG_BB_INDEX (from
),
1641 EXPR_SPEC_DONE_DS (from
), EXPR_SPEC_TO_CHECK_DS (from
),
1642 EXPR_ORIG_SCHED_CYCLE (from
), temp
,
1643 EXPR_TARGET_AVAILABLE (from
), EXPR_WAS_SUBSTITUTED (from
),
1644 EXPR_WAS_RENAMED (from
), EXPR_NEEDS_SPEC_CHECK_P (from
),
1645 EXPR_CANT_MOVE (from
));
1648 /* Same, but the final expr will not ever be in av sets, so don't copy
1649 "uninteresting" data such as bitmap cache. */
1651 copy_expr_onside (expr_t to
, expr_t from
)
1653 init_expr (to
, EXPR_VINSN (from
), EXPR_SPEC (from
), EXPR_USEFULNESS (from
),
1654 EXPR_PRIORITY (from
), EXPR_SCHED_TIMES (from
), 0,
1655 EXPR_SPEC_DONE_DS (from
), EXPR_SPEC_TO_CHECK_DS (from
), 0, NULL
,
1656 EXPR_TARGET_AVAILABLE (from
), EXPR_WAS_SUBSTITUTED (from
),
1657 EXPR_WAS_RENAMED (from
), EXPR_NEEDS_SPEC_CHECK_P (from
),
1658 EXPR_CANT_MOVE (from
));
1661 /* Prepare the expr of INSN for scheduling. Used when moving insn and when
1662 initializing new insns. */
1664 prepare_insn_expr (insn_t insn
, int seqno
)
1666 expr_t expr
= INSN_EXPR (insn
);
1669 INSN_SEQNO (insn
) = seqno
;
1670 EXPR_ORIG_BB_INDEX (expr
) = BLOCK_NUM (insn
);
1671 EXPR_SPEC (expr
) = 0;
1672 EXPR_ORIG_SCHED_CYCLE (expr
) = 0;
1673 EXPR_WAS_SUBSTITUTED (expr
) = 0;
1674 EXPR_WAS_RENAMED (expr
) = 0;
1675 EXPR_TARGET_AVAILABLE (expr
) = 1;
1676 INSN_LIVE_VALID_P (insn
) = false;
1678 /* ??? If this expression is speculative, make its dependence
1679 as weak as possible. We can filter this expression later
1680 in process_spec_exprs, because we do not distinguish
1681 between the status we got during compute_av_set and the
1682 existing status. To be fixed. */
1683 ds
= EXPR_SPEC_DONE_DS (expr
);
1685 EXPR_SPEC_DONE_DS (expr
) = ds_get_max_dep_weak (ds
);
1687 free_history_vect (&EXPR_HISTORY_OF_CHANGES (expr
));
1690 /* Update target_available bits when merging exprs TO and FROM. SPLIT_POINT
1691 is non-null when expressions are merged from different successors at
1694 update_target_availability (expr_t to
, expr_t from
, insn_t split_point
)
1696 if (EXPR_TARGET_AVAILABLE (to
) < 0
1697 || EXPR_TARGET_AVAILABLE (from
) < 0)
1698 EXPR_TARGET_AVAILABLE (to
) = -1;
1701 /* We try to detect the case when one of the expressions
1702 can only be reached through another one. In this case,
1703 we can do better. */
1704 if (split_point
== NULL
)
1708 toind
= EXPR_ORIG_BB_INDEX (to
);
1709 fromind
= EXPR_ORIG_BB_INDEX (from
);
1711 if (toind
&& toind
== fromind
)
1712 /* Do nothing -- everything is done in
1713 merge_with_other_exprs. */
1716 EXPR_TARGET_AVAILABLE (to
) = -1;
1719 EXPR_TARGET_AVAILABLE (to
) &= EXPR_TARGET_AVAILABLE (from
);
1723 /* Update speculation bits when merging exprs TO and FROM. SPLIT_POINT
1724 is non-null when expressions are merged from different successors at
1727 update_speculative_bits (expr_t to
, expr_t from
, insn_t split_point
)
1729 ds_t old_to_ds
, old_from_ds
;
1731 old_to_ds
= EXPR_SPEC_DONE_DS (to
);
1732 old_from_ds
= EXPR_SPEC_DONE_DS (from
);
1734 EXPR_SPEC_DONE_DS (to
) = ds_max_merge (old_to_ds
, old_from_ds
);
1735 EXPR_SPEC_TO_CHECK_DS (to
) |= EXPR_SPEC_TO_CHECK_DS (from
);
1736 EXPR_NEEDS_SPEC_CHECK_P (to
) |= EXPR_NEEDS_SPEC_CHECK_P (from
);
1738 /* When merging e.g. control & data speculative exprs, or a control
1739 speculative with a control&data speculative one, we really have
1740 to change vinsn too. Also, when speculative status is changed,
1741 we also need to record this as a transformation in expr's history. */
1742 if ((old_to_ds
& SPECULATIVE
) || (old_from_ds
& SPECULATIVE
))
1744 old_to_ds
= ds_get_speculation_types (old_to_ds
);
1745 old_from_ds
= ds_get_speculation_types (old_from_ds
);
1747 if (old_to_ds
!= old_from_ds
)
1751 /* When both expressions are speculative, we need to change
1753 if ((old_to_ds
& SPECULATIVE
) && (old_from_ds
& SPECULATIVE
))
1757 res
= speculate_expr (to
, EXPR_SPEC_DONE_DS (to
));
1758 gcc_assert (res
>= 0);
1761 if (split_point
!= NULL
)
1763 /* Record the change with proper status. */
1764 record_ds
= EXPR_SPEC_DONE_DS (to
) & SPECULATIVE
;
1765 record_ds
&= ~(old_to_ds
& SPECULATIVE
);
1766 record_ds
&= ~(old_from_ds
& SPECULATIVE
);
1768 insert_in_history_vect (&EXPR_HISTORY_OF_CHANGES (to
),
1769 INSN_UID (split_point
), TRANS_SPECULATION
,
1770 EXPR_VINSN (from
), EXPR_VINSN (to
),
1778 /* Merge bits of FROM expr to TO expr. When SPLIT_POINT is not NULL,
1779 this is done along different paths. */
1781 merge_expr_data (expr_t to
, expr_t from
, insn_t split_point
)
1784 expr_history_def
*phist
;
1786 /* For now, we just set the spec of resulting expr to be minimum of the specs
1788 if (EXPR_SPEC (to
) > EXPR_SPEC (from
))
1789 EXPR_SPEC (to
) = EXPR_SPEC (from
);
1792 EXPR_USEFULNESS (to
) += EXPR_USEFULNESS (from
);
1794 EXPR_USEFULNESS (to
) = MAX (EXPR_USEFULNESS (to
),
1795 EXPR_USEFULNESS (from
));
1797 if (EXPR_PRIORITY (to
) < EXPR_PRIORITY (from
))
1798 EXPR_PRIORITY (to
) = EXPR_PRIORITY (from
);
1800 if (EXPR_SCHED_TIMES (to
) > EXPR_SCHED_TIMES (from
))
1801 EXPR_SCHED_TIMES (to
) = EXPR_SCHED_TIMES (from
);
1803 if (EXPR_ORIG_BB_INDEX (to
) != EXPR_ORIG_BB_INDEX (from
))
1804 EXPR_ORIG_BB_INDEX (to
) = 0;
1806 EXPR_ORIG_SCHED_CYCLE (to
) = MIN (EXPR_ORIG_SCHED_CYCLE (to
),
1807 EXPR_ORIG_SCHED_CYCLE (from
));
1809 /* We keep this vector sorted. */
1811 VEC_iterate (expr_history_def
, EXPR_HISTORY_OF_CHANGES (from
),
1814 insert_in_history_vect (&EXPR_HISTORY_OF_CHANGES (to
),
1815 phist
->uid
, phist
->type
,
1816 phist
->old_expr_vinsn
, phist
->new_expr_vinsn
,
1819 EXPR_WAS_SUBSTITUTED (to
) |= EXPR_WAS_SUBSTITUTED (from
);
1820 EXPR_WAS_RENAMED (to
) |= EXPR_WAS_RENAMED (from
);
1821 EXPR_CANT_MOVE (to
) |= EXPR_CANT_MOVE (from
);
1823 update_target_availability (to
, from
, split_point
);
1824 update_speculative_bits (to
, from
, split_point
);
1827 /* Merge bits of FROM expr to TO expr. Vinsns in the exprs should be equal
1828 in terms of vinsn_equal_p. SPLIT_POINT is non-null when expressions
1829 are merged from different successors at a split point. */
1831 merge_expr (expr_t to
, expr_t from
, insn_t split_point
)
1833 vinsn_t to_vi
= EXPR_VINSN (to
);
1834 vinsn_t from_vi
= EXPR_VINSN (from
);
1836 gcc_assert (vinsn_equal_p (to_vi
, from_vi
));
1838 /* Make sure that speculative pattern is propagated into exprs that
1839 have non-speculative one. This will provide us with consistent
1840 speculative bits and speculative patterns inside expr. */
1841 if (EXPR_SPEC_DONE_DS (to
) == 0
1842 && EXPR_SPEC_DONE_DS (from
) != 0)
1843 change_vinsn_in_expr (to
, EXPR_VINSN (from
));
1845 merge_expr_data (to
, from
, split_point
);
1846 gcc_assert (EXPR_USEFULNESS (to
) <= REG_BR_PROB_BASE
);
1849 /* Clear the information of this EXPR. */
1851 clear_expr (expr_t expr
)
1854 vinsn_detach (EXPR_VINSN (expr
));
1855 EXPR_VINSN (expr
) = NULL
;
1857 free_history_vect (&EXPR_HISTORY_OF_CHANGES (expr
));
1860 /* For a given LV_SET, mark EXPR having unavailable target register. */
1862 set_unavailable_target_for_expr (expr_t expr
, regset lv_set
)
1864 if (EXPR_SEPARABLE_P (expr
))
1866 if (REG_P (EXPR_LHS (expr
))
1867 && bitmap_bit_p (lv_set
, REGNO (EXPR_LHS (expr
))))
1869 /* If it's an insn like r1 = use (r1, ...), and it exists in
1870 different forms in each of the av_sets being merged, we can't say
1871 whether original destination register is available or not.
1872 However, this still works if destination register is not used
1873 in the original expression: if the branch at which LV_SET we're
1874 looking here is not actually 'other branch' in sense that same
1875 expression is available through it (but it can't be determined
1876 at computation stage because of transformations on one of the
1877 branches), it still won't affect the availability.
1878 Liveness of a register somewhere on a code motion path means
1879 it's either read somewhere on a codemotion path, live on
1880 'other' branch, live at the point immediately following
1881 the original operation, or is read by the original operation.
1882 The latter case is filtered out in the condition below.
1883 It still doesn't cover the case when register is defined and used
1884 somewhere within the code motion path, and in this case we could
1885 miss a unifying code motion along both branches using a renamed
1886 register, but it won't affect a code correctness since upon
1887 an actual code motion a bookkeeping code would be generated. */
1888 if (bitmap_bit_p (VINSN_REG_USES (EXPR_VINSN (expr
)),
1889 REGNO (EXPR_LHS (expr
))))
1890 EXPR_TARGET_AVAILABLE (expr
) = -1;
1892 EXPR_TARGET_AVAILABLE (expr
) = false;
1898 reg_set_iterator rsi
;
1900 EXECUTE_IF_SET_IN_REG_SET (VINSN_REG_SETS (EXPR_VINSN (expr
)),
1902 if (bitmap_bit_p (lv_set
, regno
))
1904 EXPR_TARGET_AVAILABLE (expr
) = false;
1908 EXECUTE_IF_SET_IN_REG_SET (VINSN_REG_CLOBBERS (EXPR_VINSN (expr
)),
1910 if (bitmap_bit_p (lv_set
, regno
))
1912 EXPR_TARGET_AVAILABLE (expr
) = false;
1918 /* Try to make EXPR speculative. Return 1 when EXPR's pattern
1919 or dependence status have changed, 2 when also the target register
1920 became unavailable, 0 if nothing had to be changed. */
1922 speculate_expr (expr_t expr
, ds_t ds
)
1927 ds_t target_ds
, current_ds
;
1929 /* Obtain the status we need to put on EXPR. */
1930 target_ds
= (ds
& SPECULATIVE
);
1931 current_ds
= EXPR_SPEC_DONE_DS (expr
);
1932 ds
= ds_full_merge (current_ds
, target_ds
, NULL_RTX
, NULL_RTX
);
1934 orig_insn_rtx
= EXPR_INSN_RTX (expr
);
1936 res
= sched_speculate_insn (orig_insn_rtx
, ds
, &spec_pat
);
1941 EXPR_SPEC_DONE_DS (expr
) = ds
;
1942 return current_ds
!= ds
? 1 : 0;
1946 rtx spec_insn_rtx
= create_insn_rtx_from_pattern (spec_pat
, NULL_RTX
);
1947 vinsn_t spec_vinsn
= create_vinsn_from_insn_rtx (spec_insn_rtx
, false);
1949 change_vinsn_in_expr (expr
, spec_vinsn
);
1950 EXPR_SPEC_DONE_DS (expr
) = ds
;
1951 EXPR_NEEDS_SPEC_CHECK_P (expr
) = true;
1953 /* Do not allow clobbering the address register of speculative
1955 if (bitmap_bit_p (VINSN_REG_USES (EXPR_VINSN (expr
)),
1956 expr_dest_regno (expr
)))
1958 EXPR_TARGET_AVAILABLE (expr
) = false;
1974 /* Return a destination register, if any, of EXPR. */
1976 expr_dest_reg (expr_t expr
)
1978 rtx dest
= VINSN_LHS (EXPR_VINSN (expr
));
1980 if (dest
!= NULL_RTX
&& REG_P (dest
))
1986 /* Returns the REGNO of the R's destination. */
1988 expr_dest_regno (expr_t expr
)
1990 rtx dest
= expr_dest_reg (expr
);
1992 gcc_assert (dest
!= NULL_RTX
);
1993 return REGNO (dest
);
1996 /* For a given LV_SET, mark all expressions in JOIN_SET, but not present in
1997 AV_SET having unavailable target register. */
1999 mark_unavailable_targets (av_set_t join_set
, av_set_t av_set
, regset lv_set
)
2002 av_set_iterator avi
;
2004 FOR_EACH_EXPR (expr
, avi
, join_set
)
2005 if (av_set_lookup (av_set
, EXPR_VINSN (expr
)) == NULL
)
2006 set_unavailable_target_for_expr (expr
, lv_set
);
2010 /* Av set functions. */
2012 /* Add a new element to av set SETP.
2013 Return the element added. */
2015 av_set_add_element (av_set_t
*setp
)
2017 /* Insert at the beginning of the list. */
2022 /* Add EXPR to SETP. */
2024 av_set_add (av_set_t
*setp
, expr_t expr
)
2028 gcc_assert (!INSN_NOP_P (EXPR_INSN_RTX (expr
)));
2029 elem
= av_set_add_element (setp
);
2030 copy_expr (_AV_SET_EXPR (elem
), expr
);
2033 /* Same, but do not copy EXPR. */
2035 av_set_add_nocopy (av_set_t
*setp
, expr_t expr
)
2039 elem
= av_set_add_element (setp
);
2040 *_AV_SET_EXPR (elem
) = *expr
;
2043 /* Remove expr pointed to by IP from the av_set. */
2045 av_set_iter_remove (av_set_iterator
*ip
)
2047 clear_expr (_AV_SET_EXPR (*ip
->lp
));
2048 _list_iter_remove (ip
);
2051 /* Search for an expr in SET, such that it's equivalent to SOUGHT_VINSN in the
2052 sense of vinsn_equal_p function. Return NULL if no such expr is
2053 in SET was found. */
2055 av_set_lookup (av_set_t set
, vinsn_t sought_vinsn
)
2060 FOR_EACH_EXPR (expr
, i
, set
)
2061 if (vinsn_equal_p (EXPR_VINSN (expr
), sought_vinsn
))
2066 /* Same, but also remove the EXPR found. */
2068 av_set_lookup_and_remove (av_set_t
*setp
, vinsn_t sought_vinsn
)
2073 FOR_EACH_EXPR_1 (expr
, i
, setp
)
2074 if (vinsn_equal_p (EXPR_VINSN (expr
), sought_vinsn
))
2076 _list_iter_remove_nofree (&i
);
2082 /* Search for an expr in SET, such that it's equivalent to EXPR in the
2083 sense of vinsn_equal_p function of their vinsns, but not EXPR itself.
2084 Returns NULL if no such expr is in SET was found. */
2086 av_set_lookup_other_equiv_expr (av_set_t set
, expr_t expr
)
2091 FOR_EACH_EXPR (cur_expr
, i
, set
)
2093 if (cur_expr
== expr
)
2095 if (vinsn_equal_p (EXPR_VINSN (cur_expr
), EXPR_VINSN (expr
)))
2102 /* If other expression is already in AVP, remove one of them. */
2104 merge_with_other_exprs (av_set_t
*avp
, av_set_iterator
*ip
, expr_t expr
)
2108 expr2
= av_set_lookup_other_equiv_expr (*avp
, expr
);
2111 /* Reset target availability on merge, since taking it only from one
2112 of the exprs would be controversial for different code. */
2113 EXPR_TARGET_AVAILABLE (expr2
) = -1;
2114 EXPR_USEFULNESS (expr2
) = 0;
2116 merge_expr (expr2
, expr
, NULL
);
2118 /* Fix usefulness as it should be now REG_BR_PROB_BASE. */
2119 EXPR_USEFULNESS (expr2
) = REG_BR_PROB_BASE
;
2121 av_set_iter_remove (ip
);
2128 /* Return true if there is an expr that correlates to VI in SET. */
2130 av_set_is_in_p (av_set_t set
, vinsn_t vi
)
2132 return av_set_lookup (set
, vi
) != NULL
;
2135 /* Return a copy of SET. */
2137 av_set_copy (av_set_t set
)
2141 av_set_t res
= NULL
;
2143 FOR_EACH_EXPR (expr
, i
, set
)
2144 av_set_add (&res
, expr
);
2149 /* Join two av sets that do not have common elements by attaching second set
2150 (pointed to by FROMP) to the end of first set (TO_TAILP must point to
2151 _AV_SET_NEXT of first set's last element). */
2153 join_distinct_sets (av_set_t
*to_tailp
, av_set_t
*fromp
)
2155 gcc_assert (*to_tailp
== NULL
);
2160 /* Makes set pointed to by TO to be the union of TO and FROM. Clear av_set
2161 pointed to by FROMP afterwards. */
2163 av_set_union_and_clear (av_set_t
*top
, av_set_t
*fromp
, insn_t insn
)
2168 /* Delete from TOP all exprs, that present in FROMP. */
2169 FOR_EACH_EXPR_1 (expr1
, i
, top
)
2171 expr_t expr2
= av_set_lookup (*fromp
, EXPR_VINSN (expr1
));
2175 merge_expr (expr2
, expr1
, insn
);
2176 av_set_iter_remove (&i
);
2180 join_distinct_sets (i
.lp
, fromp
);
2183 /* Same as above, but also update availability of target register in
2184 TOP judging by TO_LV_SET and FROM_LV_SET. */
2186 av_set_union_and_live (av_set_t
*top
, av_set_t
*fromp
, regset to_lv_set
,
2187 regset from_lv_set
, insn_t insn
)
2191 av_set_t
*to_tailp
, in_both_set
= NULL
;
2193 /* Delete from TOP all expres, that present in FROMP. */
2194 FOR_EACH_EXPR_1 (expr1
, i
, top
)
2196 expr_t expr2
= av_set_lookup_and_remove (fromp
, EXPR_VINSN (expr1
));
2200 /* It may be that the expressions have different destination
2201 registers, in which case we need to check liveness here. */
2202 if (EXPR_SEPARABLE_P (expr1
))
2204 int regno1
= (REG_P (EXPR_LHS (expr1
))
2205 ? (int) expr_dest_regno (expr1
) : -1);
2206 int regno2
= (REG_P (EXPR_LHS (expr2
))
2207 ? (int) expr_dest_regno (expr2
) : -1);
2209 /* ??? We don't have a way to check restrictions for
2210 *other* register on the current path, we did it only
2211 for the current target register. Give up. */
2212 if (regno1
!= regno2
)
2213 EXPR_TARGET_AVAILABLE (expr2
) = -1;
2215 else if (EXPR_INSN_RTX (expr1
) != EXPR_INSN_RTX (expr2
))
2216 EXPR_TARGET_AVAILABLE (expr2
) = -1;
2218 merge_expr (expr2
, expr1
, insn
);
2219 av_set_add_nocopy (&in_both_set
, expr2
);
2220 av_set_iter_remove (&i
);
2223 /* EXPR1 is present in TOP, but not in FROMP. Check it on
2225 set_unavailable_target_for_expr (expr1
, from_lv_set
);
2229 /* These expressions are not present in TOP. Check liveness
2230 restrictions on TO_LV_SET. */
2231 FOR_EACH_EXPR (expr1
, i
, *fromp
)
2232 set_unavailable_target_for_expr (expr1
, to_lv_set
);
2234 join_distinct_sets (i
.lp
, &in_both_set
);
2235 join_distinct_sets (to_tailp
, fromp
);
2238 /* Clear av_set pointed to by SETP. */
2240 av_set_clear (av_set_t
*setp
)
2245 FOR_EACH_EXPR_1 (expr
, i
, setp
)
2246 av_set_iter_remove (&i
);
2248 gcc_assert (*setp
== NULL
);
2251 /* Leave only one non-speculative element in the SETP. */
2253 av_set_leave_one_nonspec (av_set_t
*setp
)
2257 bool has_one_nonspec
= false;
2259 /* Keep all speculative exprs, and leave one non-speculative
2261 FOR_EACH_EXPR_1 (expr
, i
, setp
)
2263 if (!EXPR_SPEC_DONE_DS (expr
))
2265 if (has_one_nonspec
)
2266 av_set_iter_remove (&i
);
2268 has_one_nonspec
= true;
2273 /* Return the N'th element of the SET. */
2275 av_set_element (av_set_t set
, int n
)
2280 FOR_EACH_EXPR (expr
, i
, set
)
2288 /* Deletes all expressions from AVP that are conditional branches (IFs). */
2290 av_set_substract_cond_branches (av_set_t
*avp
)
2295 FOR_EACH_EXPR_1 (expr
, i
, avp
)
2296 if (vinsn_cond_branch_p (EXPR_VINSN (expr
)))
2297 av_set_iter_remove (&i
);
2300 /* Multiplies usefulness attribute of each member of av-set *AVP by
2301 value PROB / ALL_PROB. */
2303 av_set_split_usefulness (av_set_t av
, int prob
, int all_prob
)
2308 FOR_EACH_EXPR (expr
, i
, av
)
2309 EXPR_USEFULNESS (expr
) = (all_prob
2310 ? (EXPR_USEFULNESS (expr
) * prob
) / all_prob
2314 /* Leave in AVP only those expressions, which are present in AV,
2317 av_set_intersect (av_set_t
*avp
, av_set_t av
)
2322 FOR_EACH_EXPR_1 (expr
, i
, avp
)
2323 if (av_set_lookup (av
, EXPR_VINSN (expr
)) == NULL
)
2324 av_set_iter_remove (&i
);
2329 /* Dependence hooks to initialize insn data. */
2331 /* This is used in hooks callable from dependence analysis when initializing
2332 instruction's data. */
2335 /* Where the dependence was found (lhs/rhs). */
2338 /* The actual data object to initialize. */
2341 /* True when the insn should not be made clonable. */
2342 bool force_unique_p
;
2344 /* True when insn should be treated as of type USE, i.e. never renamed. */
2346 } deps_init_id_data
;
2349 /* Setup ID for INSN. FORCE_UNIQUE_P is true when INSN should not be
2352 setup_id_for_insn (idata_t id
, insn_t insn
, bool force_unique_p
)
2356 /* Determine whether INSN could be cloned and return appropriate vinsn type.
2357 That clonable insns which can be separated into lhs and rhs have type SET.
2358 Other clonable insns have type USE. */
2359 type
= GET_CODE (insn
);
2361 /* Only regular insns could be cloned. */
2362 if (type
== INSN
&& !force_unique_p
)
2364 else if (type
== JUMP_INSN
&& simplejump_p (insn
))
2366 else if (type
== DEBUG_INSN
)
2367 type
= !force_unique_p
? USE
: INSN
;
2369 IDATA_TYPE (id
) = type
;
2370 IDATA_REG_SETS (id
) = get_clear_regset_from_pool ();
2371 IDATA_REG_USES (id
) = get_clear_regset_from_pool ();
2372 IDATA_REG_CLOBBERS (id
) = get_clear_regset_from_pool ();
2375 /* Start initializing insn data. */
2377 deps_init_id_start_insn (insn_t insn
)
2379 gcc_assert (deps_init_id_data
.where
== DEPS_IN_NOWHERE
);
2381 setup_id_for_insn (deps_init_id_data
.id
, insn
,
2382 deps_init_id_data
.force_unique_p
);
2383 deps_init_id_data
.where
= DEPS_IN_INSN
;
2386 /* Start initializing lhs data. */
2388 deps_init_id_start_lhs (rtx lhs
)
2390 gcc_assert (deps_init_id_data
.where
== DEPS_IN_INSN
);
2391 gcc_assert (IDATA_LHS (deps_init_id_data
.id
) == NULL
);
2393 if (IDATA_TYPE (deps_init_id_data
.id
) == SET
)
2395 IDATA_LHS (deps_init_id_data
.id
) = lhs
;
2396 deps_init_id_data
.where
= DEPS_IN_LHS
;
2400 /* Finish initializing lhs data. */
2402 deps_init_id_finish_lhs (void)
2404 deps_init_id_data
.where
= DEPS_IN_INSN
;
2407 /* Note a set of REGNO. */
2409 deps_init_id_note_reg_set (int regno
)
2411 haifa_note_reg_set (regno
);
2413 if (deps_init_id_data
.where
== DEPS_IN_RHS
)
2414 deps_init_id_data
.force_use_p
= true;
2416 if (IDATA_TYPE (deps_init_id_data
.id
) != PC
)
2417 SET_REGNO_REG_SET (IDATA_REG_SETS (deps_init_id_data
.id
), regno
);
2420 /* Make instructions that set stack registers to be ineligible for
2421 renaming to avoid issues with find_used_regs. */
2422 if (IN_RANGE (regno
, FIRST_STACK_REG
, LAST_STACK_REG
))
2423 deps_init_id_data
.force_use_p
= true;
2427 /* Note a clobber of REGNO. */
2429 deps_init_id_note_reg_clobber (int regno
)
2431 haifa_note_reg_clobber (regno
);
2433 if (deps_init_id_data
.where
== DEPS_IN_RHS
)
2434 deps_init_id_data
.force_use_p
= true;
2436 if (IDATA_TYPE (deps_init_id_data
.id
) != PC
)
2437 SET_REGNO_REG_SET (IDATA_REG_CLOBBERS (deps_init_id_data
.id
), regno
);
2440 /* Note a use of REGNO. */
2442 deps_init_id_note_reg_use (int regno
)
2444 haifa_note_reg_use (regno
);
2446 if (IDATA_TYPE (deps_init_id_data
.id
) != PC
)
2447 SET_REGNO_REG_SET (IDATA_REG_USES (deps_init_id_data
.id
), regno
);
2450 /* Start initializing rhs data. */
2452 deps_init_id_start_rhs (rtx rhs
)
2454 gcc_assert (deps_init_id_data
.where
== DEPS_IN_INSN
);
2456 /* And there was no sel_deps_reset_to_insn (). */
2457 if (IDATA_LHS (deps_init_id_data
.id
) != NULL
)
2459 IDATA_RHS (deps_init_id_data
.id
) = rhs
;
2460 deps_init_id_data
.where
= DEPS_IN_RHS
;
2464 /* Finish initializing rhs data. */
2466 deps_init_id_finish_rhs (void)
2468 gcc_assert (deps_init_id_data
.where
== DEPS_IN_RHS
2469 || deps_init_id_data
.where
== DEPS_IN_INSN
);
2470 deps_init_id_data
.where
= DEPS_IN_INSN
;
2473 /* Finish initializing insn data. */
2475 deps_init_id_finish_insn (void)
2477 gcc_assert (deps_init_id_data
.where
== DEPS_IN_INSN
);
2479 if (IDATA_TYPE (deps_init_id_data
.id
) == SET
)
2481 rtx lhs
= IDATA_LHS (deps_init_id_data
.id
);
2482 rtx rhs
= IDATA_RHS (deps_init_id_data
.id
);
2484 if (lhs
== NULL
|| rhs
== NULL
|| !lhs_and_rhs_separable_p (lhs
, rhs
)
2485 || deps_init_id_data
.force_use_p
)
2487 /* This should be a USE, as we don't want to schedule its RHS
2488 separately. However, we still want to have them recorded
2489 for the purposes of substitution. That's why we don't
2490 simply call downgrade_to_use () here. */
2491 gcc_assert (IDATA_TYPE (deps_init_id_data
.id
) == SET
);
2492 gcc_assert (!lhs
== !rhs
);
2494 IDATA_TYPE (deps_init_id_data
.id
) = USE
;
2498 deps_init_id_data
.where
= DEPS_IN_NOWHERE
;
2501 /* This is dependence info used for initializing insn's data. */
2502 static struct sched_deps_info_def deps_init_id_sched_deps_info
;
2504 /* This initializes most of the static part of the above structure. */
2505 static const struct sched_deps_info_def const_deps_init_id_sched_deps_info
=
2509 deps_init_id_start_insn
,
2510 deps_init_id_finish_insn
,
2511 deps_init_id_start_lhs
,
2512 deps_init_id_finish_lhs
,
2513 deps_init_id_start_rhs
,
2514 deps_init_id_finish_rhs
,
2515 deps_init_id_note_reg_set
,
2516 deps_init_id_note_reg_clobber
,
2517 deps_init_id_note_reg_use
,
2518 NULL
, /* note_mem_dep */
2519 NULL
, /* note_dep */
2522 0, /* use_deps_list */
2523 0 /* generate_spec_deps */
2526 /* Initialize INSN's lhs and rhs in ID. When FORCE_UNIQUE_P is true,
2527 we don't actually need information about lhs and rhs. */
2529 setup_id_lhs_rhs (idata_t id
, insn_t insn
, bool force_unique_p
)
2531 rtx pat
= PATTERN (insn
);
2533 if (NONJUMP_INSN_P (insn
)
2534 && GET_CODE (pat
) == SET
2537 IDATA_RHS (id
) = SET_SRC (pat
);
2538 IDATA_LHS (id
) = SET_DEST (pat
);
2541 IDATA_LHS (id
) = IDATA_RHS (id
) = NULL
;
2544 /* Possibly downgrade INSN to USE. */
2546 maybe_downgrade_id_to_use (idata_t id
, insn_t insn
)
2548 bool must_be_use
= false;
2549 unsigned uid
= INSN_UID (insn
);
2551 rtx lhs
= IDATA_LHS (id
);
2552 rtx rhs
= IDATA_RHS (id
);
2554 /* We downgrade only SETs. */
2555 if (IDATA_TYPE (id
) != SET
)
2558 if (!lhs
|| !lhs_and_rhs_separable_p (lhs
, rhs
))
2560 IDATA_TYPE (id
) = USE
;
2564 for (rec
= DF_INSN_UID_DEFS (uid
); *rec
; rec
++)
2568 if (DF_REF_INSN (def
)
2569 && DF_REF_FLAGS_IS_SET (def
, DF_REF_PRE_POST_MODIFY
)
2570 && loc_mentioned_in_p (DF_REF_LOC (def
), IDATA_RHS (id
)))
2577 /* Make instructions that set stack registers to be ineligible for
2578 renaming to avoid issues with find_used_regs. */
2579 if (IN_RANGE (DF_REF_REGNO (def
), FIRST_STACK_REG
, LAST_STACK_REG
))
2588 IDATA_TYPE (id
) = USE
;
2591 /* Setup register sets describing INSN in ID. */
2593 setup_id_reg_sets (idata_t id
, insn_t insn
)
2595 unsigned uid
= INSN_UID (insn
);
2597 regset tmp
= get_clear_regset_from_pool ();
2599 for (rec
= DF_INSN_UID_DEFS (uid
); *rec
; rec
++)
2602 unsigned int regno
= DF_REF_REGNO (def
);
2604 /* Post modifies are treated like clobbers by sched-deps.c. */
2605 if (DF_REF_FLAGS_IS_SET (def
, (DF_REF_MUST_CLOBBER
2606 | DF_REF_PRE_POST_MODIFY
)))
2607 SET_REGNO_REG_SET (IDATA_REG_CLOBBERS (id
), regno
);
2608 else if (! DF_REF_FLAGS_IS_SET (def
, DF_REF_MAY_CLOBBER
))
2610 SET_REGNO_REG_SET (IDATA_REG_SETS (id
), regno
);
2613 /* For stack registers, treat writes to them as writes
2614 to the first one to be consistent with sched-deps.c. */
2615 if (IN_RANGE (regno
, FIRST_STACK_REG
, LAST_STACK_REG
))
2616 SET_REGNO_REG_SET (IDATA_REG_SETS (id
), FIRST_STACK_REG
);
2619 /* Mark special refs that generate read/write def pair. */
2620 if (DF_REF_FLAGS_IS_SET (def
, DF_REF_CONDITIONAL
)
2621 || regno
== STACK_POINTER_REGNUM
)
2622 bitmap_set_bit (tmp
, regno
);
2625 for (rec
= DF_INSN_UID_USES (uid
); *rec
; rec
++)
2628 unsigned int regno
= DF_REF_REGNO (use
);
2630 /* When these refs are met for the first time, skip them, as
2631 these uses are just counterparts of some defs. */
2632 if (bitmap_bit_p (tmp
, regno
))
2633 bitmap_clear_bit (tmp
, regno
);
2634 else if (! DF_REF_FLAGS_IS_SET (use
, DF_REF_CALL_STACK_USAGE
))
2636 SET_REGNO_REG_SET (IDATA_REG_USES (id
), regno
);
2639 /* For stack registers, treat reads from them as reads from
2640 the first one to be consistent with sched-deps.c. */
2641 if (IN_RANGE (regno
, FIRST_STACK_REG
, LAST_STACK_REG
))
2642 SET_REGNO_REG_SET (IDATA_REG_USES (id
), FIRST_STACK_REG
);
2647 return_regset_to_pool (tmp
);
2650 /* Initialize instruction data for INSN in ID using DF's data. */
2652 init_id_from_df (idata_t id
, insn_t insn
, bool force_unique_p
)
2654 gcc_assert (DF_INSN_UID_SAFE_GET (INSN_UID (insn
)) != NULL
);
2656 setup_id_for_insn (id
, insn
, force_unique_p
);
2657 setup_id_lhs_rhs (id
, insn
, force_unique_p
);
2659 if (INSN_NOP_P (insn
))
2662 maybe_downgrade_id_to_use (id
, insn
);
2663 setup_id_reg_sets (id
, insn
);
2666 /* Initialize instruction data for INSN in ID. */
2668 deps_init_id (idata_t id
, insn_t insn
, bool force_unique_p
)
2670 struct deps _dc
, *dc
= &_dc
;
2672 deps_init_id_data
.where
= DEPS_IN_NOWHERE
;
2673 deps_init_id_data
.id
= id
;
2674 deps_init_id_data
.force_unique_p
= force_unique_p
;
2675 deps_init_id_data
.force_use_p
= false;
2677 init_deps (dc
, false);
2679 memcpy (&deps_init_id_sched_deps_info
,
2680 &const_deps_init_id_sched_deps_info
,
2681 sizeof (deps_init_id_sched_deps_info
));
2683 if (spec_info
!= NULL
)
2684 deps_init_id_sched_deps_info
.generate_spec_deps
= 1;
2686 sched_deps_info
= &deps_init_id_sched_deps_info
;
2688 deps_analyze_insn (dc
, insn
);
2692 deps_init_id_data
.id
= NULL
;
2697 /* Implement hooks for collecting fundamental insn properties like if insn is
2698 an ASM or is within a SCHED_GROUP. */
2700 /* True when a "one-time init" data for INSN was already inited. */
2702 first_time_insn_init (insn_t insn
)
2704 return INSN_LIVE (insn
) == NULL
;
2707 /* Hash an entry in a transformed_insns hashtable. */
2709 hash_transformed_insns (const void *p
)
2711 return VINSN_HASH_RTX (((const struct transformed_insns
*) p
)->vinsn_old
);
2714 /* Compare the entries in a transformed_insns hashtable. */
2716 eq_transformed_insns (const void *p
, const void *q
)
2718 rtx i1
= VINSN_INSN_RTX (((const struct transformed_insns
*) p
)->vinsn_old
);
2719 rtx i2
= VINSN_INSN_RTX (((const struct transformed_insns
*) q
)->vinsn_old
);
2721 if (INSN_UID (i1
) == INSN_UID (i2
))
2723 return rtx_equal_p (PATTERN (i1
), PATTERN (i2
));
2726 /* Free an entry in a transformed_insns hashtable. */
2728 free_transformed_insns (void *p
)
2730 struct transformed_insns
*pti
= (struct transformed_insns
*) p
;
2732 vinsn_detach (pti
->vinsn_old
);
2733 vinsn_detach (pti
->vinsn_new
);
2737 /* Init the s_i_d data for INSN which should be inited just once, when
2738 we first see the insn. */
2740 init_first_time_insn_data (insn_t insn
)
2742 /* This should not be set if this is the first time we init data for
2744 gcc_assert (first_time_insn_init (insn
));
2746 /* These are needed for nops too. */
2747 INSN_LIVE (insn
) = get_regset_from_pool ();
2748 INSN_LIVE_VALID_P (insn
) = false;
2750 if (!INSN_NOP_P (insn
))
2752 INSN_ANALYZED_DEPS (insn
) = BITMAP_ALLOC (NULL
);
2753 INSN_FOUND_DEPS (insn
) = BITMAP_ALLOC (NULL
);
2754 INSN_TRANSFORMED_INSNS (insn
)
2755 = htab_create (16, hash_transformed_insns
,
2756 eq_transformed_insns
, free_transformed_insns
);
2757 init_deps (&INSN_DEPS_CONTEXT (insn
), true);
2761 /* Free almost all above data for INSN that is scheduled already.
2762 Used for extra-large basic blocks. */
2764 free_data_for_scheduled_insn (insn_t insn
)
2766 gcc_assert (! first_time_insn_init (insn
));
2768 if (! INSN_ANALYZED_DEPS (insn
))
2771 BITMAP_FREE (INSN_ANALYZED_DEPS (insn
));
2772 BITMAP_FREE (INSN_FOUND_DEPS (insn
));
2773 htab_delete (INSN_TRANSFORMED_INSNS (insn
));
2775 /* This is allocated only for bookkeeping insns. */
2776 if (INSN_ORIGINATORS (insn
))
2777 BITMAP_FREE (INSN_ORIGINATORS (insn
));
2778 free_deps (&INSN_DEPS_CONTEXT (insn
));
2780 INSN_ANALYZED_DEPS (insn
) = NULL
;
2782 /* Clear the readonly flag so we would ICE when trying to recalculate
2783 the deps context (as we believe that it should not happen). */
2784 (&INSN_DEPS_CONTEXT (insn
))->readonly
= 0;
2787 /* Free the same data as above for INSN. */
2789 free_first_time_insn_data (insn_t insn
)
2791 gcc_assert (! first_time_insn_init (insn
));
2793 free_data_for_scheduled_insn (insn
);
2794 return_regset_to_pool (INSN_LIVE (insn
));
2795 INSN_LIVE (insn
) = NULL
;
2796 INSN_LIVE_VALID_P (insn
) = false;
2799 /* Initialize region-scope data structures for basic blocks. */
2801 init_global_and_expr_for_bb (basic_block bb
)
2803 if (sel_bb_empty_p (bb
))
2806 invalidate_av_set (bb
);
2809 /* Data for global dependency analysis (to initialize CANT_MOVE and
2813 /* Previous insn. */
2817 /* Determine if INSN is in the sched_group, is an asm or should not be
2818 cloned. After that initialize its expr. */
2820 init_global_and_expr_for_insn (insn_t insn
)
2825 if (NOTE_INSN_BASIC_BLOCK_P (insn
))
2827 init_global_data
.prev_insn
= NULL_RTX
;
2831 gcc_assert (INSN_P (insn
));
2833 if (SCHED_GROUP_P (insn
))
2834 /* Setup a sched_group. */
2836 insn_t prev_insn
= init_global_data
.prev_insn
;
2839 INSN_SCHED_NEXT (prev_insn
) = insn
;
2841 init_global_data
.prev_insn
= insn
;
2844 init_global_data
.prev_insn
= NULL_RTX
;
2846 if (GET_CODE (PATTERN (insn
)) == ASM_INPUT
2847 || asm_noperands (PATTERN (insn
)) >= 0)
2848 /* Mark INSN as an asm. */
2849 INSN_ASM_P (insn
) = true;
2852 bool force_unique_p
;
2855 /* Certain instructions cannot be cloned. */
2856 if (CANT_MOVE (insn
)
2857 || INSN_ASM_P (insn
)
2858 || SCHED_GROUP_P (insn
)
2859 || prologue_epilogue_contains (insn
)
2860 /* Exception handling insns are always unique. */
2861 || (flag_non_call_exceptions
&& can_throw_internal (insn
))
2862 /* TRAP_IF though have an INSN code is control_flow_insn_p (). */
2863 || control_flow_insn_p (insn
))
2864 force_unique_p
= true;
2866 force_unique_p
= false;
2868 if (targetm
.sched
.get_insn_spec_ds
)
2870 spec_done_ds
= targetm
.sched
.get_insn_spec_ds (insn
);
2871 spec_done_ds
= ds_get_max_dep_weak (spec_done_ds
);
2876 /* Initialize INSN's expr. */
2877 init_expr (INSN_EXPR (insn
), vinsn_create (insn
, force_unique_p
), 0,
2878 REG_BR_PROB_BASE
, INSN_PRIORITY (insn
), 0, BLOCK_NUM (insn
),
2879 spec_done_ds
, 0, 0, NULL
, true, false, false, false,
2883 init_first_time_insn_data (insn
);
2886 /* Scan the region and initialize instruction data for basic blocks BBS. */
2888 sel_init_global_and_expr (bb_vec_t bbs
)
2890 /* ??? It would be nice to implement push / pop scheme for sched_infos. */
2891 const struct sched_scan_info_def ssi
=
2893 NULL
, /* extend_bb */
2894 init_global_and_expr_for_bb
, /* init_bb */
2895 extend_insn_data
, /* extend_insn */
2896 init_global_and_expr_for_insn
/* init_insn */
2899 sched_scan (&ssi
, bbs
, NULL
, NULL
, NULL
);
2902 /* Finalize region-scope data structures for basic blocks. */
2904 finish_global_and_expr_for_bb (basic_block bb
)
2906 av_set_clear (&BB_AV_SET (bb
));
2907 BB_AV_LEVEL (bb
) = 0;
2910 /* Finalize INSN's data. */
2912 finish_global_and_expr_insn (insn_t insn
)
2914 if (LABEL_P (insn
) || NOTE_INSN_BASIC_BLOCK_P (insn
))
2917 gcc_assert (INSN_P (insn
));
2919 if (INSN_LUID (insn
) > 0)
2921 free_first_time_insn_data (insn
);
2922 INSN_WS_LEVEL (insn
) = 0;
2923 CANT_MOVE (insn
) = 0;
2925 /* We can no longer assert this, as vinsns of this insn could be
2926 easily live in other insn's caches. This should be changed to
2927 a counter-like approach among all vinsns. */
2928 gcc_assert (true || VINSN_COUNT (INSN_VINSN (insn
)) == 1);
2929 clear_expr (INSN_EXPR (insn
));
2933 /* Finalize per instruction data for the whole region. */
2935 sel_finish_global_and_expr (void)
2941 bbs
= VEC_alloc (basic_block
, heap
, current_nr_blocks
);
2943 for (i
= 0; i
< current_nr_blocks
; i
++)
2944 VEC_quick_push (basic_block
, bbs
, BASIC_BLOCK (BB_TO_BLOCK (i
)));
2946 /* Clear AV_SETs and INSN_EXPRs. */
2948 const struct sched_scan_info_def ssi
=
2950 NULL
, /* extend_bb */
2951 finish_global_and_expr_for_bb
, /* init_bb */
2952 NULL
, /* extend_insn */
2953 finish_global_and_expr_insn
/* init_insn */
2956 sched_scan (&ssi
, bbs
, NULL
, NULL
, NULL
);
2959 VEC_free (basic_block
, heap
, bbs
);
2966 /* In the below hooks, we merely calculate whether or not a dependence
2967 exists, and in what part of insn. However, we will need more data
2968 when we'll start caching dependence requests. */
2970 /* Container to hold information for dependency analysis. */
2975 /* A variable to track which part of rtx we are scanning in
2976 sched-deps.c: sched_analyze_insn (). */
2979 /* Current producer. */
2982 /* Current consumer. */
2985 /* Is SEL_DEPS_HAS_DEP_P[DEPS_IN_X] is true, then X has a dependence.
2986 X is from { INSN, LHS, RHS }. */
2987 ds_t has_dep_p
[DEPS_IN_NOWHERE
];
2988 } has_dependence_data
;
2990 /* Start analyzing dependencies of INSN. */
2992 has_dependence_start_insn (insn_t insn ATTRIBUTE_UNUSED
)
2994 gcc_assert (has_dependence_data
.where
== DEPS_IN_NOWHERE
);
2996 has_dependence_data
.where
= DEPS_IN_INSN
;
2999 /* Finish analyzing dependencies of an insn. */
3001 has_dependence_finish_insn (void)
3003 gcc_assert (has_dependence_data
.where
== DEPS_IN_INSN
);
3005 has_dependence_data
.where
= DEPS_IN_NOWHERE
;
3008 /* Start analyzing dependencies of LHS. */
3010 has_dependence_start_lhs (rtx lhs ATTRIBUTE_UNUSED
)
3012 gcc_assert (has_dependence_data
.where
== DEPS_IN_INSN
);
3014 if (VINSN_LHS (has_dependence_data
.con
) != NULL
)
3015 has_dependence_data
.where
= DEPS_IN_LHS
;
3018 /* Finish analyzing dependencies of an lhs. */
3020 has_dependence_finish_lhs (void)
3022 has_dependence_data
.where
= DEPS_IN_INSN
;
3025 /* Start analyzing dependencies of RHS. */
3027 has_dependence_start_rhs (rtx rhs ATTRIBUTE_UNUSED
)
3029 gcc_assert (has_dependence_data
.where
== DEPS_IN_INSN
);
3031 if (VINSN_RHS (has_dependence_data
.con
) != NULL
)
3032 has_dependence_data
.where
= DEPS_IN_RHS
;
3035 /* Start analyzing dependencies of an rhs. */
3037 has_dependence_finish_rhs (void)
3039 gcc_assert (has_dependence_data
.where
== DEPS_IN_RHS
3040 || has_dependence_data
.where
== DEPS_IN_INSN
);
3042 has_dependence_data
.where
= DEPS_IN_INSN
;
3045 /* Note a set of REGNO. */
3047 has_dependence_note_reg_set (int regno
)
3049 struct deps_reg
*reg_last
= &has_dependence_data
.dc
->reg_last
[regno
];
3051 if (!sched_insns_conditions_mutex_p (has_dependence_data
.pro
,
3053 (has_dependence_data
.con
)))
3055 ds_t
*dsp
= &has_dependence_data
.has_dep_p
[has_dependence_data
.where
];
3057 if (reg_last
->sets
!= NULL
3058 || reg_last
->clobbers
!= NULL
)
3059 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_OUTPUT
;
3062 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_ANTI
;
3066 /* Note a clobber of REGNO. */
3068 has_dependence_note_reg_clobber (int regno
)
3070 struct deps_reg
*reg_last
= &has_dependence_data
.dc
->reg_last
[regno
];
3072 if (!sched_insns_conditions_mutex_p (has_dependence_data
.pro
,
3074 (has_dependence_data
.con
)))
3076 ds_t
*dsp
= &has_dependence_data
.has_dep_p
[has_dependence_data
.where
];
3079 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_OUTPUT
;
3082 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_ANTI
;
3086 /* Note a use of REGNO. */
3088 has_dependence_note_reg_use (int regno
)
3090 struct deps_reg
*reg_last
= &has_dependence_data
.dc
->reg_last
[regno
];
3092 if (!sched_insns_conditions_mutex_p (has_dependence_data
.pro
,
3094 (has_dependence_data
.con
)))
3096 ds_t
*dsp
= &has_dependence_data
.has_dep_p
[has_dependence_data
.where
];
3099 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_TRUE
;
3101 if (reg_last
->clobbers
)
3102 *dsp
= (*dsp
& ~SPECULATIVE
) | DEP_ANTI
;
3104 /* Handle BE_IN_SPEC. */
3107 ds_t pro_spec_checked_ds
;
3109 pro_spec_checked_ds
= INSN_SPEC_CHECKED_DS (has_dependence_data
.pro
);
3110 pro_spec_checked_ds
= ds_get_max_dep_weak (pro_spec_checked_ds
);
3112 if (pro_spec_checked_ds
!= 0)
3113 /* Merge BE_IN_SPEC bits into *DSP. */
3114 *dsp
= ds_full_merge (*dsp
, pro_spec_checked_ds
,
3115 NULL_RTX
, NULL_RTX
);
3120 /* Note a memory dependence. */
3122 has_dependence_note_mem_dep (rtx mem ATTRIBUTE_UNUSED
,
3123 rtx pending_mem ATTRIBUTE_UNUSED
,
3124 insn_t pending_insn ATTRIBUTE_UNUSED
,
3125 ds_t ds ATTRIBUTE_UNUSED
)
3127 if (!sched_insns_conditions_mutex_p (has_dependence_data
.pro
,
3128 VINSN_INSN_RTX (has_dependence_data
.con
)))
3130 ds_t
*dsp
= &has_dependence_data
.has_dep_p
[has_dependence_data
.where
];
3132 *dsp
= ds_full_merge (ds
, *dsp
, pending_mem
, mem
);
3136 /* Note a dependence. */
3138 has_dependence_note_dep (insn_t pro ATTRIBUTE_UNUSED
,
3139 ds_t ds ATTRIBUTE_UNUSED
)
3141 if (!sched_insns_conditions_mutex_p (has_dependence_data
.pro
,
3142 VINSN_INSN_RTX (has_dependence_data
.con
)))
3144 ds_t
*dsp
= &has_dependence_data
.has_dep_p
[has_dependence_data
.where
];
3146 *dsp
= ds_full_merge (ds
, *dsp
, NULL_RTX
, NULL_RTX
);
3150 /* Mark the insn as having a hard dependence that prevents speculation. */
3152 sel_mark_hard_insn (rtx insn
)
3156 /* Only work when we're in has_dependence_p mode.
3157 ??? This is a hack, this should actually be a hook. */
3158 if (!has_dependence_data
.dc
|| !has_dependence_data
.pro
)
3161 gcc_assert (insn
== VINSN_INSN_RTX (has_dependence_data
.con
));
3162 gcc_assert (has_dependence_data
.where
== DEPS_IN_INSN
);
3164 for (i
= 0; i
< DEPS_IN_NOWHERE
; i
++)
3165 has_dependence_data
.has_dep_p
[i
] &= ~SPECULATIVE
;
3168 /* This structure holds the hooks for the dependency analysis used when
3169 actually processing dependencies in the scheduler. */
3170 static struct sched_deps_info_def has_dependence_sched_deps_info
;
3172 /* This initializes most of the fields of the above structure. */
3173 static const struct sched_deps_info_def const_has_dependence_sched_deps_info
=
3177 has_dependence_start_insn
,
3178 has_dependence_finish_insn
,
3179 has_dependence_start_lhs
,
3180 has_dependence_finish_lhs
,
3181 has_dependence_start_rhs
,
3182 has_dependence_finish_rhs
,
3183 has_dependence_note_reg_set
,
3184 has_dependence_note_reg_clobber
,
3185 has_dependence_note_reg_use
,
3186 has_dependence_note_mem_dep
,
3187 has_dependence_note_dep
,
3190 0, /* use_deps_list */
3191 0 /* generate_spec_deps */
3194 /* Initialize has_dependence_sched_deps_info with extra spec field. */
3196 setup_has_dependence_sched_deps_info (void)
3198 memcpy (&has_dependence_sched_deps_info
,
3199 &const_has_dependence_sched_deps_info
,
3200 sizeof (has_dependence_sched_deps_info
));
3202 if (spec_info
!= NULL
)
3203 has_dependence_sched_deps_info
.generate_spec_deps
= 1;
3205 sched_deps_info
= &has_dependence_sched_deps_info
;
3208 /* Remove all dependences found and recorded in has_dependence_data array. */
3210 sel_clear_has_dependence (void)
3214 for (i
= 0; i
< DEPS_IN_NOWHERE
; i
++)
3215 has_dependence_data
.has_dep_p
[i
] = 0;
3218 /* Return nonzero if EXPR has is dependent upon PRED. Return the pointer
3219 to the dependence information array in HAS_DEP_PP. */
3221 has_dependence_p (expr_t expr
, insn_t pred
, ds_t
**has_dep_pp
)
3227 if (INSN_SIMPLEJUMP_P (pred
))
3228 /* Unconditional jump is just a transfer of control flow.
3232 dc
= &INSN_DEPS_CONTEXT (pred
);
3234 /* We init this field lazily. */
3235 if (dc
->reg_last
== NULL
)
3236 init_deps_reg_last (dc
);
3240 has_dependence_data
.pro
= NULL
;
3241 /* Initialize empty dep context with information about PRED. */
3242 advance_deps_context (dc
, pred
);
3246 has_dependence_data
.where
= DEPS_IN_NOWHERE
;
3247 has_dependence_data
.pro
= pred
;
3248 has_dependence_data
.con
= EXPR_VINSN (expr
);
3249 has_dependence_data
.dc
= dc
;
3251 sel_clear_has_dependence ();
3253 /* Now catch all dependencies that would be generated between PRED and
3255 setup_has_dependence_sched_deps_info ();
3256 deps_analyze_insn (dc
, EXPR_INSN_RTX (expr
));
3257 has_dependence_data
.dc
= NULL
;
3259 /* When a barrier was found, set DEPS_IN_INSN bits. */
3260 if (dc
->last_reg_pending_barrier
== TRUE_BARRIER
)
3261 has_dependence_data
.has_dep_p
[DEPS_IN_INSN
] = DEP_TRUE
;
3262 else if (dc
->last_reg_pending_barrier
== MOVE_BARRIER
)
3263 has_dependence_data
.has_dep_p
[DEPS_IN_INSN
] = DEP_ANTI
;
3265 /* Do not allow stores to memory to move through checks. Currently
3266 we don't move this to sched-deps.c as the check doesn't have
3267 obvious places to which this dependence can be attached.
3268 FIMXE: this should go to a hook. */
3270 && MEM_P (EXPR_LHS (expr
))
3271 && sel_insn_is_speculation_check (pred
))
3272 has_dependence_data
.has_dep_p
[DEPS_IN_INSN
] = DEP_ANTI
;
3274 *has_dep_pp
= has_dependence_data
.has_dep_p
;
3276 for (i
= 0; i
< DEPS_IN_NOWHERE
; i
++)
3277 ds
= ds_full_merge (ds
, has_dependence_data
.has_dep_p
[i
],
3278 NULL_RTX
, NULL_RTX
);
3284 /* Dependence hooks implementation that checks dependence latency constraints
3285 on the insns being scheduled. The entry point for these routines is
3286 tick_check_p predicate. */
3290 /* An expr we are currently checking. */
3293 /* A minimal cycle for its scheduling. */
3296 /* Whether we have seen a true dependence while checking. */
3297 bool seen_true_dep_p
;
3300 /* Update minimal scheduling cycle for tick_check_insn given that it depends
3301 on PRO with status DS and weight DW. */
3303 tick_check_dep_with_dw (insn_t pro_insn
, ds_t ds
, dw_t dw
)
3305 expr_t con_expr
= tick_check_data
.expr
;
3306 insn_t con_insn
= EXPR_INSN_RTX (con_expr
);
3308 if (con_insn
!= pro_insn
)
3313 if (/* PROducer was removed from above due to pipelining. */
3314 !INSN_IN_STREAM_P (pro_insn
)
3315 /* Or PROducer was originally on the next iteration regarding the
3317 || (INSN_SCHED_TIMES (pro_insn
)
3318 - EXPR_SCHED_TIMES (con_expr
)) > 1)
3319 /* Don't count this dependence. */
3323 if (dt
== REG_DEP_TRUE
)
3324 tick_check_data
.seen_true_dep_p
= true;
3326 gcc_assert (INSN_SCHED_CYCLE (pro_insn
) > 0);
3329 dep_def _dep
, *dep
= &_dep
;
3331 init_dep (dep
, pro_insn
, con_insn
, dt
);
3333 tick
= INSN_SCHED_CYCLE (pro_insn
) + dep_cost_1 (dep
, dw
);
3336 /* When there are several kinds of dependencies between pro and con,
3337 only REG_DEP_TRUE should be taken into account. */
3338 if (tick
> tick_check_data
.cycle
3339 && (dt
== REG_DEP_TRUE
|| !tick_check_data
.seen_true_dep_p
))
3340 tick_check_data
.cycle
= tick
;
3344 /* An implementation of note_dep hook. */
3346 tick_check_note_dep (insn_t pro
, ds_t ds
)
3348 tick_check_dep_with_dw (pro
, ds
, 0);
3351 /* An implementation of note_mem_dep hook. */
3353 tick_check_note_mem_dep (rtx mem1
, rtx mem2
, insn_t pro
, ds_t ds
)
3357 dw
= (ds_to_dt (ds
) == REG_DEP_TRUE
3358 ? estimate_dep_weak (mem1
, mem2
)
3361 tick_check_dep_with_dw (pro
, ds
, dw
);
3364 /* This structure contains hooks for dependence analysis used when determining
3365 whether an insn is ready for scheduling. */
3366 static struct sched_deps_info_def tick_check_sched_deps_info
=
3377 haifa_note_reg_clobber
,
3379 tick_check_note_mem_dep
,
3380 tick_check_note_dep
,
3385 /* Estimate number of cycles from the current cycle of FENCE until EXPR can be
3386 scheduled. Return 0 if all data from producers in DC is ready. */
3388 tick_check_p (expr_t expr
, deps_t dc
, fence_t fence
)
3391 /* Initialize variables. */
3392 tick_check_data
.expr
= expr
;
3393 tick_check_data
.cycle
= 0;
3394 tick_check_data
.seen_true_dep_p
= false;
3395 sched_deps_info
= &tick_check_sched_deps_info
;
3397 gcc_assert (!dc
->readonly
);
3399 deps_analyze_insn (dc
, EXPR_INSN_RTX (expr
));
3402 cycles_left
= tick_check_data
.cycle
- FENCE_CYCLE (fence
);
3404 return cycles_left
>= 0 ? cycles_left
: 0;
3408 /* Functions to work with insns. */
3410 /* Returns true if LHS of INSN is the same as DEST of an insn
3413 lhs_of_insn_equals_to_dest_p (insn_t insn
, rtx dest
)
3415 rtx lhs
= INSN_LHS (insn
);
3417 if (lhs
== NULL
|| dest
== NULL
)
3420 return rtx_equal_p (lhs
, dest
);
3423 /* Return s_i_d entry of INSN. Callable from debugger. */
3425 insn_sid (insn_t insn
)
3430 /* True when INSN is a speculative check. We can tell this by looking
3431 at the data structures of the selective scheduler, not by examining
3434 sel_insn_is_speculation_check (rtx insn
)
3436 return s_i_d
&& !! INSN_SPEC_CHECKED_DS (insn
);
3439 /* Extracts machine mode MODE and destination location DST_LOC
3442 get_dest_and_mode (rtx insn
, rtx
*dst_loc
, enum machine_mode
*mode
)
3444 rtx pat
= PATTERN (insn
);
3446 gcc_assert (dst_loc
);
3447 gcc_assert (GET_CODE (pat
) == SET
);
3449 *dst_loc
= SET_DEST (pat
);
3451 gcc_assert (*dst_loc
);
3452 gcc_assert (MEM_P (*dst_loc
) || REG_P (*dst_loc
));
3455 *mode
= GET_MODE (*dst_loc
);
3458 /* Returns true when moving through JUMP will result in bookkeeping
3461 bookkeeping_can_be_created_if_moved_through_p (insn_t jump
)
3466 FOR_EACH_SUCC (succ
, si
, jump
)
3467 if (sel_num_cfg_preds_gt_1 (succ
))
3473 /* Return 'true' if INSN is the only one in its basic block. */
3475 insn_is_the_only_one_in_bb_p (insn_t insn
)
3477 return sel_bb_head_p (insn
) && sel_bb_end_p (insn
);
3480 #ifdef ENABLE_CHECKING
3481 /* Check that the region we're scheduling still has at most one
3484 verify_backedges (void)
3492 for (i
= 0; i
< current_nr_blocks
; i
++)
3493 FOR_EACH_EDGE (e
, ei
, BASIC_BLOCK (BB_TO_BLOCK (i
))->succs
)
3494 if (in_current_region_p (e
->dest
)
3495 && BLOCK_TO_BB (e
->dest
->index
) < i
)
3498 gcc_assert (n
<= 1);
3504 /* Functions to work with control flow. */
3506 /* Tidy the possibly empty block BB. */
3508 maybe_tidy_empty_bb (basic_block bb
)
3510 basic_block succ_bb
, pred_bb
;
3515 /* Keep empty bb only if this block immediately precedes EXIT and
3516 has incoming non-fallthrough edge. Otherwise remove it. */
3517 if (!sel_bb_empty_p (bb
)
3518 || (single_succ_p (bb
)
3519 && single_succ (bb
) == EXIT_BLOCK_PTR
3520 && (!single_pred_p (bb
)
3521 || !(single_pred_edge (bb
)->flags
& EDGE_FALLTHRU
))))
3524 /* Do not attempt to redirect complex edges. */
3525 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
3526 if (e
->flags
& EDGE_COMPLEX
)
3529 free_data_sets (bb
);
3531 /* Do not delete BB if it has more than one successor.
3532 That can occur when we moving a jump. */
3533 if (!single_succ_p (bb
))
3535 gcc_assert (can_merge_blocks_p (bb
->prev_bb
, bb
));
3536 sel_merge_blocks (bb
->prev_bb
, bb
);
3540 succ_bb
= single_succ (bb
);
3544 /* Redirect all non-fallthru edges to the next bb. */
3549 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
3553 if (!(e
->flags
& EDGE_FALLTHRU
))
3555 sel_redirect_edge_and_branch (e
, succ_bb
);
3562 /* If it is possible - merge BB with its predecessor. */
3563 if (can_merge_blocks_p (bb
->prev_bb
, bb
))
3564 sel_merge_blocks (bb
->prev_bb
, bb
);
3566 /* Otherwise this is a block without fallthru predecessor.
3569 gcc_assert (pred_bb
!= NULL
);
3571 move_bb_info (pred_bb
, bb
);
3572 remove_empty_bb (bb
, true);
3575 #ifdef ENABLE_CHECKING
3576 verify_backedges ();
3582 /* Tidy the control flow after we have removed original insn from
3583 XBB. Return true if we have removed some blocks. When FULL_TIDYING
3584 is true, also try to optimize control flow on non-empty blocks. */
3586 tidy_control_flow (basic_block xbb
, bool full_tidying
)
3588 bool changed
= true;
3591 /* First check whether XBB is empty. */
3592 changed
= maybe_tidy_empty_bb (xbb
);
3593 if (changed
|| !full_tidying
)
3596 /* Check if there is a unnecessary jump after insn left. */
3597 if (jump_leads_only_to_bb_p (BB_END (xbb
), xbb
->next_bb
)
3598 && INSN_SCHED_TIMES (BB_END (xbb
)) == 0
3599 && !IN_CURRENT_FENCE_P (BB_END (xbb
)))
3601 if (sel_remove_insn (BB_END (xbb
), false, false))
3603 tidy_fallthru_edge (EDGE_SUCC (xbb
, 0));
3606 first
= sel_bb_head (xbb
);
3607 last
= sel_bb_end (xbb
);
3608 if (MAY_HAVE_DEBUG_INSNS
)
3610 if (first
!= last
&& DEBUG_INSN_P (first
))
3612 first
= NEXT_INSN (first
);
3613 while (first
!= last
&& (DEBUG_INSN_P (first
) || NOTE_P (first
)));
3615 if (first
!= last
&& DEBUG_INSN_P (last
))
3617 last
= PREV_INSN (last
);
3618 while (first
!= last
&& (DEBUG_INSN_P (last
) || NOTE_P (last
)));
3620 /* Check if there is an unnecessary jump in previous basic block leading
3621 to next basic block left after removing INSN from stream.
3622 If it is so, remove that jump and redirect edge to current
3623 basic block (where there was INSN before deletion). This way
3624 when NOP will be deleted several instructions later with its
3625 basic block we will not get a jump to next instruction, which
3628 && !sel_bb_empty_p (xbb
)
3629 && INSN_NOP_P (last
)
3630 /* Flow goes fallthru from current block to the next. */
3631 && EDGE_COUNT (xbb
->succs
) == 1
3632 && (EDGE_SUCC (xbb
, 0)->flags
& EDGE_FALLTHRU
)
3633 /* When successor is an EXIT block, it may not be the next block. */
3634 && single_succ (xbb
) != EXIT_BLOCK_PTR
3635 /* And unconditional jump in previous basic block leads to
3636 next basic block of XBB and this jump can be safely removed. */
3637 && in_current_region_p (xbb
->prev_bb
)
3638 && jump_leads_only_to_bb_p (BB_END (xbb
->prev_bb
), xbb
->next_bb
)
3639 && INSN_SCHED_TIMES (BB_END (xbb
->prev_bb
)) == 0
3640 /* Also this jump is not at the scheduling boundary. */
3641 && !IN_CURRENT_FENCE_P (BB_END (xbb
->prev_bb
)))
3643 /* Clear data structures of jump - jump itself will be removed
3644 by sel_redirect_edge_and_branch. */
3645 clear_expr (INSN_EXPR (BB_END (xbb
->prev_bb
)));
3646 sel_redirect_edge_and_branch (EDGE_SUCC (xbb
->prev_bb
, 0), xbb
);
3647 gcc_assert (EDGE_SUCC (xbb
->prev_bb
, 0)->flags
& EDGE_FALLTHRU
);
3649 /* It can turn out that after removing unused jump, basic block
3650 that contained that jump, becomes empty too. In such case
3652 if (sel_bb_empty_p (xbb
->prev_bb
))
3653 changed
= maybe_tidy_empty_bb (xbb
->prev_bb
);
3659 /* Rip-off INSN from the insn stream. When ONLY_DISCONNECT is true,
3660 do not delete insn's data, because it will be later re-emitted.
3661 Return true if we have removed some blocks afterwards. */
3663 sel_remove_insn (insn_t insn
, bool only_disconnect
, bool full_tidying
)
3665 basic_block bb
= BLOCK_FOR_INSN (insn
);
3667 gcc_assert (INSN_IN_STREAM_P (insn
));
3669 if (DEBUG_INSN_P (insn
) && BB_AV_SET_VALID_P (bb
))
3674 /* When we remove a debug insn that is head of a BB, it remains
3675 in the AV_SET of the block, but it shouldn't. */
3676 FOR_EACH_EXPR_1 (expr
, i
, &BB_AV_SET (bb
))
3677 if (EXPR_INSN_RTX (expr
) == insn
)
3679 av_set_iter_remove (&i
);
3684 if (only_disconnect
)
3686 insn_t prev
= PREV_INSN (insn
);
3687 insn_t next
= NEXT_INSN (insn
);
3688 basic_block bb
= BLOCK_FOR_INSN (insn
);
3690 NEXT_INSN (prev
) = next
;
3691 PREV_INSN (next
) = prev
;
3693 if (BB_HEAD (bb
) == insn
)
3695 gcc_assert (BLOCK_FOR_INSN (prev
) == bb
);
3696 BB_HEAD (bb
) = prev
;
3698 if (BB_END (bb
) == insn
)
3704 clear_expr (INSN_EXPR (insn
));
3707 /* It is necessary to null this fields before calling add_insn (). */
3708 PREV_INSN (insn
) = NULL_RTX
;
3709 NEXT_INSN (insn
) = NULL_RTX
;
3711 return tidy_control_flow (bb
, full_tidying
);
3714 /* Estimate number of the insns in BB. */
3716 sel_estimate_number_of_insns (basic_block bb
)
3719 insn_t insn
= NEXT_INSN (BB_HEAD (bb
)), next_tail
= NEXT_INSN (BB_END (bb
));
3721 for (; insn
!= next_tail
; insn
= NEXT_INSN (insn
))
3722 if (NONDEBUG_INSN_P (insn
))
3728 /* We don't need separate luids for notes or labels. */
3730 sel_luid_for_non_insn (rtx x
)
3732 gcc_assert (NOTE_P (x
) || LABEL_P (x
));
3737 /* Return seqno of the only predecessor of INSN. */
3739 get_seqno_of_a_pred (insn_t insn
)
3743 gcc_assert (INSN_SIMPLEJUMP_P (insn
));
3745 if (!sel_bb_head_p (insn
))
3746 seqno
= INSN_SEQNO (PREV_INSN (insn
));
3749 basic_block bb
= BLOCK_FOR_INSN (insn
);
3751 if (single_pred_p (bb
)
3752 && !in_current_region_p (single_pred (bb
)))
3754 /* We can have preds outside a region when splitting edges
3755 for pipelining of an outer loop. Use succ instead.
3756 There should be only one of them. */
3761 gcc_assert (flag_sel_sched_pipelining_outer_loops
3762 && current_loop_nest
);
3763 FOR_EACH_SUCC_1 (succ
, si
, insn
,
3764 SUCCS_NORMAL
| SUCCS_SKIP_TO_LOOP_EXITS
)
3770 gcc_assert (succ
!= NULL
);
3771 seqno
= INSN_SEQNO (succ
);
3778 cfg_preds (BLOCK_FOR_INSN (insn
), &preds
, &n
);
3779 gcc_assert (n
== 1);
3781 seqno
= INSN_SEQNO (preds
[0]);
3790 /* Find the proper seqno for inserting at INSN. Returns -1 if no predecessors
3791 with positive seqno exist. */
3793 get_seqno_by_preds (rtx insn
)
3795 basic_block bb
= BLOCK_FOR_INSN (insn
);
3796 rtx tmp
= insn
, head
= BB_HEAD (bb
);
3802 return INSN_SEQNO (tmp
);
3804 tmp
= PREV_INSN (tmp
);
3806 cfg_preds (bb
, &preds
, &n
);
3807 for (i
= 0, seqno
= -1; i
< n
; i
++)
3808 seqno
= MAX (seqno
, INSN_SEQNO (preds
[i
]));
3815 /* Extend pass-scope data structures for basic blocks. */
3817 sel_extend_global_bb_info (void)
3819 VEC_safe_grow_cleared (sel_global_bb_info_def
, heap
, sel_global_bb_info
,
3823 /* Extend region-scope data structures for basic blocks. */
3825 extend_region_bb_info (void)
3827 VEC_safe_grow_cleared (sel_region_bb_info_def
, heap
, sel_region_bb_info
,
3831 /* Extend all data structures to fit for all basic blocks. */
3833 extend_bb_info (void)
3835 sel_extend_global_bb_info ();
3836 extend_region_bb_info ();
3839 /* Finalize pass-scope data structures for basic blocks. */
3841 sel_finish_global_bb_info (void)
3843 VEC_free (sel_global_bb_info_def
, heap
, sel_global_bb_info
);
3846 /* Finalize region-scope data structures for basic blocks. */
3848 finish_region_bb_info (void)
3850 VEC_free (sel_region_bb_info_def
, heap
, sel_region_bb_info
);
3854 /* Data for each insn in current region. */
3855 VEC (sel_insn_data_def
, heap
) *s_i_d
= NULL
;
3857 /* A vector for the insns we've emitted. */
3858 static insn_vec_t new_insns
= NULL
;
3860 /* Extend data structures for insns from current region. */
3862 extend_insn_data (void)
3866 sched_extend_target ();
3867 sched_deps_init (false);
3869 /* Extend data structures for insns from current region. */
3870 reserve
= (sched_max_luid
+ 1
3871 - VEC_length (sel_insn_data_def
, s_i_d
));
3873 && ! VEC_space (sel_insn_data_def
, s_i_d
, reserve
))
3877 if (sched_max_luid
/ 2 > 1024)
3878 size
= sched_max_luid
+ 1024;
3880 size
= 3 * sched_max_luid
/ 2;
3883 VEC_safe_grow_cleared (sel_insn_data_def
, heap
, s_i_d
, size
);
3887 /* Finalize data structures for insns from current region. */
3893 /* Clear here all dependence contexts that may have left from insns that were
3894 removed during the scheduling. */
3895 for (i
= 0; i
< VEC_length (sel_insn_data_def
, s_i_d
); i
++)
3897 sel_insn_data_def
*sid_entry
= VEC_index (sel_insn_data_def
, s_i_d
, i
);
3899 if (sid_entry
->live
)
3900 return_regset_to_pool (sid_entry
->live
);
3901 if (sid_entry
->analyzed_deps
)
3903 BITMAP_FREE (sid_entry
->analyzed_deps
);
3904 BITMAP_FREE (sid_entry
->found_deps
);
3905 htab_delete (sid_entry
->transformed_insns
);
3906 free_deps (&sid_entry
->deps_context
);
3908 if (EXPR_VINSN (&sid_entry
->expr
))
3910 clear_expr (&sid_entry
->expr
);
3912 /* Also, clear CANT_MOVE bit here, because we really don't want it
3913 to be passed to the next region. */
3914 CANT_MOVE_BY_LUID (i
) = 0;
3918 VEC_free (sel_insn_data_def
, heap
, s_i_d
);
3921 /* A proxy to pass initialization data to init_insn (). */
3922 static sel_insn_data_def _insn_init_ssid
;
3923 static sel_insn_data_t insn_init_ssid
= &_insn_init_ssid
;
3925 /* If true create a new vinsn. Otherwise use the one from EXPR. */
3926 static bool insn_init_create_new_vinsn_p
;
3928 /* Set all necessary data for initialization of the new insn[s]. */
3930 set_insn_init (expr_t expr
, vinsn_t vi
, int seqno
)
3932 expr_t x
= &insn_init_ssid
->expr
;
3934 copy_expr_onside (x
, expr
);
3937 insn_init_create_new_vinsn_p
= false;
3938 change_vinsn_in_expr (x
, vi
);
3941 insn_init_create_new_vinsn_p
= true;
3943 insn_init_ssid
->seqno
= seqno
;
3947 /* Init data for INSN. */
3949 init_insn_data (insn_t insn
)
3952 sel_insn_data_t ssid
= insn_init_ssid
;
3954 /* The fields mentioned below are special and hence are not being
3955 propagated to the new insns. */
3956 gcc_assert (!ssid
->asm_p
&& ssid
->sched_next
== NULL
3957 && !ssid
->after_stall_p
&& ssid
->sched_cycle
== 0);
3958 gcc_assert (INSN_P (insn
) && INSN_LUID (insn
) > 0);
3960 expr
= INSN_EXPR (insn
);
3961 copy_expr (expr
, &ssid
->expr
);
3962 prepare_insn_expr (insn
, ssid
->seqno
);
3964 if (insn_init_create_new_vinsn_p
)
3965 change_vinsn_in_expr (expr
, vinsn_create (insn
, init_insn_force_unique_p
));
3967 if (first_time_insn_init (insn
))
3968 init_first_time_insn_data (insn
);
3971 /* This is used to initialize spurious jumps generated by
3972 sel_redirect_edge (). */
3974 init_simplejump_data (insn_t insn
)
3976 init_expr (INSN_EXPR (insn
), vinsn_create (insn
, false), 0,
3977 REG_BR_PROB_BASE
, 0, 0, 0, 0, 0, 0, NULL
, true, false, false,
3979 INSN_SEQNO (insn
) = get_seqno_of_a_pred (insn
);
3980 init_first_time_insn_data (insn
);
3983 /* Perform deferred initialization of insns. This is used to process
3984 a new jump that may be created by redirect_edge. */
3986 sel_init_new_insn (insn_t insn
, int flags
)
3988 /* We create data structures for bb when the first insn is emitted in it. */
3990 && INSN_IN_STREAM_P (insn
)
3991 && insn_is_the_only_one_in_bb_p (insn
))
3994 create_initial_data_sets (BLOCK_FOR_INSN (insn
));
3997 if (flags
& INSN_INIT_TODO_LUID
)
3998 sched_init_luids (NULL
, NULL
, NULL
, insn
);
4000 if (flags
& INSN_INIT_TODO_SSID
)
4002 extend_insn_data ();
4003 init_insn_data (insn
);
4004 clear_expr (&insn_init_ssid
->expr
);
4007 if (flags
& INSN_INIT_TODO_SIMPLEJUMP
)
4009 extend_insn_data ();
4010 init_simplejump_data (insn
);
4013 gcc_assert (CONTAINING_RGN (BLOCK_NUM (insn
))
4014 == CONTAINING_RGN (BB_TO_BLOCK (0)));
4018 /* Functions to init/finish work with lv sets. */
4020 /* Init BB_LV_SET of BB from DF_LR_IN set of BB. */
4022 init_lv_set (basic_block bb
)
4024 gcc_assert (!BB_LV_SET_VALID_P (bb
));
4026 BB_LV_SET (bb
) = get_regset_from_pool ();
4027 COPY_REG_SET (BB_LV_SET (bb
), DF_LR_IN (bb
));
4028 BB_LV_SET_VALID_P (bb
) = true;
4031 /* Copy liveness information to BB from FROM_BB. */
4033 copy_lv_set_from (basic_block bb
, basic_block from_bb
)
4035 gcc_assert (!BB_LV_SET_VALID_P (bb
));
4037 COPY_REG_SET (BB_LV_SET (bb
), BB_LV_SET (from_bb
));
4038 BB_LV_SET_VALID_P (bb
) = true;
4041 /* Initialize lv set of all bb headers. */
4047 /* Initialize of LV sets. */
4051 /* Don't forget EXIT_BLOCK. */
4052 init_lv_set (EXIT_BLOCK_PTR
);
4055 /* Release lv set of HEAD. */
4057 free_lv_set (basic_block bb
)
4059 gcc_assert (BB_LV_SET (bb
) != NULL
);
4061 return_regset_to_pool (BB_LV_SET (bb
));
4062 BB_LV_SET (bb
) = NULL
;
4063 BB_LV_SET_VALID_P (bb
) = false;
4066 /* Finalize lv sets of all bb headers. */
4072 /* Don't forget EXIT_BLOCK. */
4073 free_lv_set (EXIT_BLOCK_PTR
);
4081 /* Initialize an invalid AV_SET for BB.
4082 This set will be updated next time compute_av () process BB. */
4084 invalidate_av_set (basic_block bb
)
4086 gcc_assert (BB_AV_LEVEL (bb
) <= 0
4087 && BB_AV_SET (bb
) == NULL
);
4089 BB_AV_LEVEL (bb
) = -1;
4092 /* Create initial data sets for BB (they will be invalid). */
4094 create_initial_data_sets (basic_block bb
)
4097 BB_LV_SET_VALID_P (bb
) = false;
4099 BB_LV_SET (bb
) = get_regset_from_pool ();
4100 invalidate_av_set (bb
);
4103 /* Free av set of BB. */
4105 free_av_set (basic_block bb
)
4107 av_set_clear (&BB_AV_SET (bb
));
4108 BB_AV_LEVEL (bb
) = 0;
4111 /* Free data sets of BB. */
4113 free_data_sets (basic_block bb
)
4119 /* Exchange lv sets of TO and FROM. */
4121 exchange_lv_sets (basic_block to
, basic_block from
)
4124 regset to_lv_set
= BB_LV_SET (to
);
4126 BB_LV_SET (to
) = BB_LV_SET (from
);
4127 BB_LV_SET (from
) = to_lv_set
;
4131 bool to_lv_set_valid_p
= BB_LV_SET_VALID_P (to
);
4133 BB_LV_SET_VALID_P (to
) = BB_LV_SET_VALID_P (from
);
4134 BB_LV_SET_VALID_P (from
) = to_lv_set_valid_p
;
4139 /* Exchange av sets of TO and FROM. */
4141 exchange_av_sets (basic_block to
, basic_block from
)
4144 av_set_t to_av_set
= BB_AV_SET (to
);
4146 BB_AV_SET (to
) = BB_AV_SET (from
);
4147 BB_AV_SET (from
) = to_av_set
;
4151 int to_av_level
= BB_AV_LEVEL (to
);
4153 BB_AV_LEVEL (to
) = BB_AV_LEVEL (from
);
4154 BB_AV_LEVEL (from
) = to_av_level
;
4158 /* Exchange data sets of TO and FROM. */
4160 exchange_data_sets (basic_block to
, basic_block from
)
4162 exchange_lv_sets (to
, from
);
4163 exchange_av_sets (to
, from
);
4166 /* Copy data sets of FROM to TO. */
4168 copy_data_sets (basic_block to
, basic_block from
)
4170 gcc_assert (!BB_LV_SET_VALID_P (to
) && !BB_AV_SET_VALID_P (to
));
4171 gcc_assert (BB_AV_SET (to
) == NULL
);
4173 BB_AV_LEVEL (to
) = BB_AV_LEVEL (from
);
4174 BB_LV_SET_VALID_P (to
) = BB_LV_SET_VALID_P (from
);
4176 if (BB_AV_SET_VALID_P (from
))
4178 BB_AV_SET (to
) = av_set_copy (BB_AV_SET (from
));
4180 if (BB_LV_SET_VALID_P (from
))
4182 gcc_assert (BB_LV_SET (to
) != NULL
);
4183 COPY_REG_SET (BB_LV_SET (to
), BB_LV_SET (from
));
4187 /* Return an av set for INSN, if any. */
4189 get_av_set (insn_t insn
)
4193 gcc_assert (AV_SET_VALID_P (insn
));
4195 if (sel_bb_head_p (insn
))
4196 av_set
= BB_AV_SET (BLOCK_FOR_INSN (insn
));
4203 /* Implementation of AV_LEVEL () macro. Return AV_LEVEL () of INSN. */
4205 get_av_level (insn_t insn
)
4209 gcc_assert (INSN_P (insn
));
4211 if (sel_bb_head_p (insn
))
4212 av_level
= BB_AV_LEVEL (BLOCK_FOR_INSN (insn
));
4214 av_level
= INSN_WS_LEVEL (insn
);
4221 /* Variables to work with control-flow graph. */
4223 /* The basic block that already has been processed by the sched_data_update (),
4224 but hasn't been in sel_add_bb () yet. */
4225 static VEC (basic_block
, heap
) *last_added_blocks
= NULL
;
4227 /* A pool for allocating successor infos. */
4230 /* A stack for saving succs_info structures. */
4231 struct succs_info
*stack
;
4236 /* Top of the stack. */
4239 /* Maximal value of the top. */
4243 /* Functions to work with control-flow graph. */
4245 /* Return basic block note of BB. */
4247 sel_bb_head (basic_block bb
)
4251 if (bb
== EXIT_BLOCK_PTR
)
4253 gcc_assert (exit_insn
!= NULL_RTX
);
4260 note
= bb_note (bb
);
4261 head
= next_nonnote_insn (note
);
4263 if (head
&& BLOCK_FOR_INSN (head
) != bb
)
4270 /* Return true if INSN is a basic block header. */
4272 sel_bb_head_p (insn_t insn
)
4274 return sel_bb_head (BLOCK_FOR_INSN (insn
)) == insn
;
4277 /* Return last insn of BB. */
4279 sel_bb_end (basic_block bb
)
4281 if (sel_bb_empty_p (bb
))
4284 gcc_assert (bb
!= EXIT_BLOCK_PTR
);
4289 /* Return true if INSN is the last insn in its basic block. */
4291 sel_bb_end_p (insn_t insn
)
4293 return insn
== sel_bb_end (BLOCK_FOR_INSN (insn
));
4296 /* Return true if BB consist of single NOTE_INSN_BASIC_BLOCK. */
4298 sel_bb_empty_p (basic_block bb
)
4300 return sel_bb_head (bb
) == NULL
;
4303 /* True when BB belongs to the current scheduling region. */
4305 in_current_region_p (basic_block bb
)
4307 if (bb
->index
< NUM_FIXED_BLOCKS
)
4310 return CONTAINING_RGN (bb
->index
) == CONTAINING_RGN (BB_TO_BLOCK (0));
4313 /* Return the block which is a fallthru bb of a conditional jump JUMP. */
4315 fallthru_bb_of_jump (rtx jump
)
4320 if (any_uncondjump_p (jump
))
4321 return single_succ (BLOCK_FOR_INSN (jump
));
4323 if (!any_condjump_p (jump
))
4326 /* A basic block that ends with a conditional jump may still have one successor
4327 (and be followed by a barrier), we are not interested. */
4328 if (single_succ_p (BLOCK_FOR_INSN (jump
)))
4331 return FALLTHRU_EDGE (BLOCK_FOR_INSN (jump
))->dest
;
4334 /* Remove all notes from BB. */
4336 init_bb (basic_block bb
)
4338 remove_notes (bb_note (bb
), BB_END (bb
));
4339 BB_NOTE_LIST (bb
) = note_list
;
4343 sel_init_bbs (bb_vec_t bbs
, basic_block bb
)
4345 const struct sched_scan_info_def ssi
=
4347 extend_bb_info
, /* extend_bb */
4348 init_bb
, /* init_bb */
4349 NULL
, /* extend_insn */
4350 NULL
/* init_insn */
4353 sched_scan (&ssi
, bbs
, bb
, new_insns
, NULL
);
4356 /* Restore other notes for the whole region. */
4358 sel_restore_other_notes (void)
4362 for (bb
= 0; bb
< current_nr_blocks
; bb
++)
4364 basic_block first
, last
;
4366 first
= EBB_FIRST_BB (bb
);
4367 last
= EBB_LAST_BB (bb
)->next_bb
;
4371 note_list
= BB_NOTE_LIST (first
);
4372 restore_other_notes (NULL
, first
);
4373 BB_NOTE_LIST (first
) = NULL_RTX
;
4375 first
= first
->next_bb
;
4377 while (first
!= last
);
4381 /* Free per-bb data structures. */
4383 sel_finish_bbs (void)
4385 sel_restore_other_notes ();
4387 /* Remove current loop preheader from this loop. */
4388 if (current_loop_nest
)
4389 sel_remove_loop_preheader ();
4391 finish_region_bb_info ();
4394 /* Return true if INSN has a single successor of type FLAGS. */
4396 sel_insn_has_single_succ_p (insn_t insn
, int flags
)
4400 bool first_p
= true;
4402 FOR_EACH_SUCC_1 (succ
, si
, insn
, flags
)
4413 /* Allocate successor's info. */
4414 static struct succs_info
*
4415 alloc_succs_info (void)
4417 if (succs_info_pool
.top
== succs_info_pool
.max_top
)
4421 if (++succs_info_pool
.max_top
>= succs_info_pool
.size
)
4424 i
= ++succs_info_pool
.top
;
4425 succs_info_pool
.stack
[i
].succs_ok
= VEC_alloc (rtx
, heap
, 10);
4426 succs_info_pool
.stack
[i
].succs_other
= VEC_alloc (rtx
, heap
, 10);
4427 succs_info_pool
.stack
[i
].probs_ok
= VEC_alloc (int, heap
, 10);
4430 succs_info_pool
.top
++;
4432 return &succs_info_pool
.stack
[succs_info_pool
.top
];
4435 /* Free successor's info. */
4437 free_succs_info (struct succs_info
* sinfo
)
4439 gcc_assert (succs_info_pool
.top
>= 0
4440 && &succs_info_pool
.stack
[succs_info_pool
.top
] == sinfo
);
4441 succs_info_pool
.top
--;
4443 /* Clear stale info. */
4444 VEC_block_remove (rtx
, sinfo
->succs_ok
,
4445 0, VEC_length (rtx
, sinfo
->succs_ok
));
4446 VEC_block_remove (rtx
, sinfo
->succs_other
,
4447 0, VEC_length (rtx
, sinfo
->succs_other
));
4448 VEC_block_remove (int, sinfo
->probs_ok
,
4449 0, VEC_length (int, sinfo
->probs_ok
));
4450 sinfo
->all_prob
= 0;
4451 sinfo
->succs_ok_n
= 0;
4452 sinfo
->all_succs_n
= 0;
4455 /* Compute successor info for INSN. FLAGS are the flags passed
4456 to the FOR_EACH_SUCC_1 iterator. */
4458 compute_succs_info (insn_t insn
, short flags
)
4462 struct succs_info
*sinfo
= alloc_succs_info ();
4464 /* Traverse *all* successors and decide what to do with each. */
4465 FOR_EACH_SUCC_1 (succ
, si
, insn
, SUCCS_ALL
)
4467 /* FIXME: this doesn't work for skipping to loop exits, as we don't
4468 perform code motion through inner loops. */
4469 short current_flags
= si
.current_flags
& ~SUCCS_SKIP_TO_LOOP_EXITS
;
4471 if (current_flags
& flags
)
4473 VEC_safe_push (rtx
, heap
, sinfo
->succs_ok
, succ
);
4474 VEC_safe_push (int, heap
, sinfo
->probs_ok
,
4475 /* FIXME: Improve calculation when skipping
4476 inner loop to exits. */
4478 ? si
.e1
->probability
4479 : REG_BR_PROB_BASE
));
4480 sinfo
->succs_ok_n
++;
4483 VEC_safe_push (rtx
, heap
, sinfo
->succs_other
, succ
);
4485 /* Compute all_prob. */
4487 sinfo
->all_prob
= REG_BR_PROB_BASE
;
4489 sinfo
->all_prob
+= si
.e1
->probability
;
4491 sinfo
->all_succs_n
++;
4497 /* Return the predecessors of BB in PREDS and their number in N.
4498 Empty blocks are skipped. SIZE is used to allocate PREDS. */
4500 cfg_preds_1 (basic_block bb
, insn_t
**preds
, int *n
, int *size
)
4505 gcc_assert (BLOCK_TO_BB (bb
->index
) != 0);
4507 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
4509 basic_block pred_bb
= e
->src
;
4510 insn_t bb_end
= BB_END (pred_bb
);
4512 /* ??? This code is not supposed to walk out of a region. */
4513 gcc_assert (in_current_region_p (pred_bb
));
4515 if (sel_bb_empty_p (pred_bb
))
4516 cfg_preds_1 (pred_bb
, preds
, n
, size
);
4520 *preds
= XRESIZEVEC (insn_t
, *preds
,
4521 (*size
= 2 * *size
+ 1));
4522 (*preds
)[(*n
)++] = bb_end
;
4526 gcc_assert (*n
!= 0);
4529 /* Find all predecessors of BB and record them in PREDS and their number
4530 in N. Empty blocks are skipped, and only normal (forward in-region)
4531 edges are processed. */
4533 cfg_preds (basic_block bb
, insn_t
**preds
, int *n
)
4539 cfg_preds_1 (bb
, preds
, n
, &size
);
4542 /* Returns true if we are moving INSN through join point. */
4544 sel_num_cfg_preds_gt_1 (insn_t insn
)
4548 if (!sel_bb_head_p (insn
) || INSN_BB (insn
) == 0)
4551 bb
= BLOCK_FOR_INSN (insn
);
4555 if (EDGE_COUNT (bb
->preds
) > 1)
4558 gcc_assert (EDGE_PRED (bb
, 0)->dest
== bb
);
4559 bb
= EDGE_PRED (bb
, 0)->src
;
4561 if (!sel_bb_empty_p (bb
))
4568 /* Returns true when BB should be the end of an ebb. Adapted from the
4569 code in sched-ebb.c. */
4571 bb_ends_ebb_p (basic_block bb
)
4573 basic_block next_bb
= bb_next_bb (bb
);
4577 if (next_bb
== EXIT_BLOCK_PTR
4578 || bitmap_bit_p (forced_ebb_heads
, next_bb
->index
)
4579 || (LABEL_P (BB_HEAD (next_bb
))
4580 /* NB: LABEL_NUSES () is not maintained outside of jump.c.
4581 Work around that. */
4582 && !single_pred_p (next_bb
)))
4585 if (!in_current_region_p (next_bb
))
4588 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
4589 if ((e
->flags
& EDGE_FALLTHRU
) != 0)
4591 gcc_assert (e
->dest
== next_bb
);
4599 /* Returns true when INSN and SUCC are in the same EBB, given that SUCC is a
4600 successor of INSN. */
4602 in_same_ebb_p (insn_t insn
, insn_t succ
)
4604 basic_block ptr
= BLOCK_FOR_INSN (insn
);
4608 if (ptr
== BLOCK_FOR_INSN (succ
))
4611 if (bb_ends_ebb_p (ptr
))
4614 ptr
= bb_next_bb (ptr
);
4621 /* Recomputes the reverse topological order for the function and
4622 saves it in REV_TOP_ORDER_INDEX. REV_TOP_ORDER_INDEX_LEN is also
4623 modified appropriately. */
4625 recompute_rev_top_order (void)
4630 if (!rev_top_order_index
|| rev_top_order_index_len
< last_basic_block
)
4632 rev_top_order_index_len
= last_basic_block
;
4633 rev_top_order_index
= XRESIZEVEC (int, rev_top_order_index
,
4634 rev_top_order_index_len
);
4637 postorder
= XNEWVEC (int, n_basic_blocks
);
4639 n_blocks
= post_order_compute (postorder
, true, false);
4640 gcc_assert (n_basic_blocks
== n_blocks
);
4642 /* Build reverse function: for each basic block with BB->INDEX == K
4643 rev_top_order_index[K] is it's reverse topological sort number. */
4644 for (i
= 0; i
< n_blocks
; i
++)
4646 gcc_assert (postorder
[i
] < rev_top_order_index_len
);
4647 rev_top_order_index
[postorder
[i
]] = i
;
4653 /* Clear all flags from insns in BB that could spoil its rescheduling. */
4655 clear_outdated_rtx_info (basic_block bb
)
4659 FOR_BB_INSNS (bb
, insn
)
4662 SCHED_GROUP_P (insn
) = 0;
4663 INSN_AFTER_STALL_P (insn
) = 0;
4664 INSN_SCHED_TIMES (insn
) = 0;
4665 EXPR_PRIORITY_ADJ (INSN_EXPR (insn
)) = 0;
4667 /* We cannot use the changed caches, as previously we could ignore
4668 the LHS dependence due to enabled renaming and transform
4669 the expression, and currently we'll be unable to do this. */
4670 htab_empty (INSN_TRANSFORMED_INSNS (insn
));
4674 /* Add BB_NOTE to the pool of available basic block notes. */
4676 return_bb_to_pool (basic_block bb
)
4678 rtx note
= bb_note (bb
);
4680 gcc_assert (NOTE_BASIC_BLOCK (note
) == bb
4681 && bb
->aux
== NULL
);
4683 /* It turns out that current cfg infrastructure does not support
4684 reuse of basic blocks. Don't bother for now. */
4685 /*VEC_safe_push (rtx, heap, bb_note_pool, note);*/
4688 /* Get a bb_note from pool or return NULL_RTX if pool is empty. */
4690 get_bb_note_from_pool (void)
4692 if (VEC_empty (rtx
, bb_note_pool
))
4696 rtx note
= VEC_pop (rtx
, bb_note_pool
);
4698 PREV_INSN (note
) = NULL_RTX
;
4699 NEXT_INSN (note
) = NULL_RTX
;
4705 /* Free bb_note_pool. */
4707 free_bb_note_pool (void)
4709 VEC_free (rtx
, heap
, bb_note_pool
);
4712 /* Setup scheduler pool and successor structure. */
4714 alloc_sched_pools (void)
4718 succs_size
= MAX_WS
+ 1;
4719 succs_info_pool
.stack
= XCNEWVEC (struct succs_info
, succs_size
);
4720 succs_info_pool
.size
= succs_size
;
4721 succs_info_pool
.top
= -1;
4722 succs_info_pool
.max_top
= -1;
4724 sched_lists_pool
= create_alloc_pool ("sel-sched-lists",
4725 sizeof (struct _list_node
), 500);
4728 /* Free the pools. */
4730 free_sched_pools (void)
4734 free_alloc_pool (sched_lists_pool
);
4735 gcc_assert (succs_info_pool
.top
== -1);
4736 for (i
= 0; i
< succs_info_pool
.max_top
; i
++)
4738 VEC_free (rtx
, heap
, succs_info_pool
.stack
[i
].succs_ok
);
4739 VEC_free (rtx
, heap
, succs_info_pool
.stack
[i
].succs_other
);
4740 VEC_free (int, heap
, succs_info_pool
.stack
[i
].probs_ok
);
4742 free (succs_info_pool
.stack
);
4746 /* Returns a position in RGN where BB can be inserted retaining
4747 topological order. */
4749 find_place_to_insert_bb (basic_block bb
, int rgn
)
4751 bool has_preds_outside_rgn
= false;
4755 /* Find whether we have preds outside the region. */
4756 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
4757 if (!in_current_region_p (e
->src
))
4759 has_preds_outside_rgn
= true;
4763 /* Recompute the top order -- needed when we have > 1 pred
4764 and in case we don't have preds outside. */
4765 if (flag_sel_sched_pipelining_outer_loops
4766 && (has_preds_outside_rgn
|| EDGE_COUNT (bb
->preds
) > 1))
4768 int i
, bbi
= bb
->index
, cur_bbi
;
4770 recompute_rev_top_order ();
4771 for (i
= RGN_NR_BLOCKS (rgn
) - 1; i
>= 0; i
--)
4773 cur_bbi
= BB_TO_BLOCK (i
);
4774 if (rev_top_order_index
[bbi
]
4775 < rev_top_order_index
[cur_bbi
])
4779 /* We skipped the right block, so we increase i. We accomodate
4780 it for increasing by step later, so we decrease i. */
4783 else if (has_preds_outside_rgn
)
4785 /* This is the case when we generate an extra empty block
4786 to serve as region head during pipelining. */
4787 e
= EDGE_SUCC (bb
, 0);
4788 gcc_assert (EDGE_COUNT (bb
->succs
) == 1
4789 && in_current_region_p (EDGE_SUCC (bb
, 0)->dest
)
4790 && (BLOCK_TO_BB (e
->dest
->index
) == 0));
4794 /* We don't have preds outside the region. We should have
4795 the only pred, because the multiple preds case comes from
4796 the pipelining of outer loops, and that is handled above.
4797 Just take the bbi of this single pred. */
4798 if (EDGE_COUNT (bb
->succs
) > 0)
4802 gcc_assert (EDGE_COUNT (bb
->preds
) == 1);
4804 pred_bbi
= EDGE_PRED (bb
, 0)->src
->index
;
4805 return BLOCK_TO_BB (pred_bbi
);
4808 /* BB has no successors. It is safe to put it in the end. */
4809 return current_nr_blocks
- 1;
4812 /* Deletes an empty basic block freeing its data. */
4814 delete_and_free_basic_block (basic_block bb
)
4816 gcc_assert (sel_bb_empty_p (bb
));
4821 bitmap_clear_bit (blocks_to_reschedule
, bb
->index
);
4823 /* Can't assert av_set properties because we use sel_aremove_bb
4824 when removing loop preheader from the region. At the point of
4825 removing the preheader we already have deallocated sel_region_bb_info. */
4826 gcc_assert (BB_LV_SET (bb
) == NULL
4827 && !BB_LV_SET_VALID_P (bb
)
4828 && BB_AV_LEVEL (bb
) == 0
4829 && BB_AV_SET (bb
) == NULL
);
4831 delete_basic_block (bb
);
4834 /* Add BB to the current region and update the region data. */
4836 add_block_to_current_region (basic_block bb
)
4838 int i
, pos
, bbi
= -2, rgn
;
4840 rgn
= CONTAINING_RGN (BB_TO_BLOCK (0));
4841 bbi
= find_place_to_insert_bb (bb
, rgn
);
4843 pos
= RGN_BLOCKS (rgn
) + bbi
;
4845 gcc_assert (RGN_HAS_REAL_EBB (rgn
) == 0
4846 && ebb_head
[bbi
] == pos
);
4848 /* Make a place for the new block. */
4851 for (i
= RGN_BLOCKS (rgn
+ 1) - 1; i
>= pos
; i
--)
4852 BLOCK_TO_BB (rgn_bb_table
[i
])++;
4854 memmove (rgn_bb_table
+ pos
+ 1,
4856 (RGN_BLOCKS (nr_regions
) - pos
) * sizeof (*rgn_bb_table
));
4858 /* Initialize data for BB. */
4859 rgn_bb_table
[pos
] = bb
->index
;
4860 BLOCK_TO_BB (bb
->index
) = bbi
;
4861 CONTAINING_RGN (bb
->index
) = rgn
;
4863 RGN_NR_BLOCKS (rgn
)++;
4865 for (i
= rgn
+ 1; i
<= nr_regions
; i
++)
4869 /* Remove BB from the current region and update the region data. */
4871 remove_bb_from_region (basic_block bb
)
4873 int i
, pos
, bbi
= -2, rgn
;
4875 rgn
= CONTAINING_RGN (BB_TO_BLOCK (0));
4876 bbi
= BLOCK_TO_BB (bb
->index
);
4877 pos
= RGN_BLOCKS (rgn
) + bbi
;
4879 gcc_assert (RGN_HAS_REAL_EBB (rgn
) == 0
4880 && ebb_head
[bbi
] == pos
);
4882 for (i
= RGN_BLOCKS (rgn
+ 1) - 1; i
>= pos
; i
--)
4883 BLOCK_TO_BB (rgn_bb_table
[i
])--;
4885 memmove (rgn_bb_table
+ pos
,
4886 rgn_bb_table
+ pos
+ 1,
4887 (RGN_BLOCKS (nr_regions
) - pos
) * sizeof (*rgn_bb_table
));
4889 RGN_NR_BLOCKS (rgn
)--;
4890 for (i
= rgn
+ 1; i
<= nr_regions
; i
++)
4894 /* Add BB to the current region and update all data. If BB is NULL, add all
4895 blocks from last_added_blocks vector. */
4897 sel_add_bb (basic_block bb
)
4899 /* Extend luids so that new notes will receive zero luids. */
4900 sched_init_luids (NULL
, NULL
, NULL
, NULL
);
4902 sel_init_bbs (last_added_blocks
, NULL
);
4904 /* When bb is passed explicitly, the vector should contain
4905 the only element that equals to bb; otherwise, the vector
4906 should not be NULL. */
4907 gcc_assert (last_added_blocks
!= NULL
);
4911 gcc_assert (VEC_length (basic_block
, last_added_blocks
) == 1
4912 && VEC_index (basic_block
,
4913 last_added_blocks
, 0) == bb
);
4914 add_block_to_current_region (bb
);
4916 /* We associate creating/deleting data sets with the first insn
4917 appearing / disappearing in the bb. */
4918 if (!sel_bb_empty_p (bb
) && BB_LV_SET (bb
) == NULL
)
4919 create_initial_data_sets (bb
);
4921 VEC_free (basic_block
, heap
, last_added_blocks
);
4924 /* BB is NULL - process LAST_ADDED_BLOCKS instead. */
4927 basic_block temp_bb
= NULL
;
4930 VEC_iterate (basic_block
, last_added_blocks
, i
, bb
); i
++)
4932 add_block_to_current_region (bb
);
4936 /* We need to fetch at least one bb so we know the region
4938 gcc_assert (temp_bb
!= NULL
);
4941 VEC_free (basic_block
, heap
, last_added_blocks
);
4944 rgn_setup_region (CONTAINING_RGN (bb
->index
));
4947 /* Remove BB from the current region and update all data.
4948 If REMOVE_FROM_CFG_PBB is true, also remove the block cfom cfg. */
4950 sel_remove_bb (basic_block bb
, bool remove_from_cfg_p
)
4952 gcc_assert (bb
!= NULL
&& BB_NOTE_LIST (bb
) == NULL_RTX
);
4954 remove_bb_from_region (bb
);
4955 return_bb_to_pool (bb
);
4956 bitmap_clear_bit (blocks_to_reschedule
, bb
->index
);
4958 if (remove_from_cfg_p
)
4959 delete_and_free_basic_block (bb
);
4961 rgn_setup_region (CONTAINING_RGN (bb
->index
));
4964 /* Concatenate info of EMPTY_BB to info of MERGE_BB. */
4966 move_bb_info (basic_block merge_bb
, basic_block empty_bb
)
4968 gcc_assert (in_current_region_p (merge_bb
));
4970 concat_note_lists (BB_NOTE_LIST (empty_bb
),
4971 &BB_NOTE_LIST (merge_bb
));
4972 BB_NOTE_LIST (empty_bb
) = NULL_RTX
;
4976 /* Remove an empty basic block EMPTY_BB. When MERGE_UP_P is true, we put
4977 EMPTY_BB's note lists into its predecessor instead of putting them
4978 into the successor. When REMOVE_FROM_CFG_P is true, also remove
4981 sel_remove_empty_bb (basic_block empty_bb
, bool merge_up_p
,
4982 bool remove_from_cfg_p
)
4984 basic_block merge_bb
;
4986 gcc_assert (sel_bb_empty_p (empty_bb
));
4990 merge_bb
= empty_bb
->prev_bb
;
4991 gcc_assert (EDGE_COUNT (empty_bb
->preds
) == 1
4992 && EDGE_PRED (empty_bb
, 0)->src
== merge_bb
);
4999 merge_bb
= bb_next_bb (empty_bb
);
5001 /* Redirect incoming edges (except fallthrough one) of EMPTY_BB to its
5003 for (ei
= ei_start (empty_bb
->preds
);
5004 (e
= ei_safe_edge (ei
)); )
5006 if (! (e
->flags
& EDGE_FALLTHRU
))
5007 sel_redirect_edge_and_branch (e
, merge_bb
);
5012 gcc_assert (EDGE_COUNT (empty_bb
->succs
) == 1
5013 && EDGE_SUCC (empty_bb
, 0)->dest
== merge_bb
);
5016 move_bb_info (merge_bb
, empty_bb
);
5017 remove_empty_bb (empty_bb
, remove_from_cfg_p
);
5020 /* Remove EMPTY_BB. If REMOVE_FROM_CFG_P is false, remove EMPTY_BB from
5021 region, but keep it in CFG. */
5023 remove_empty_bb (basic_block empty_bb
, bool remove_from_cfg_p
)
5025 /* The block should contain just a note or a label.
5026 We try to check whether it is unused below. */
5027 gcc_assert (BB_HEAD (empty_bb
) == BB_END (empty_bb
)
5028 || LABEL_P (BB_HEAD (empty_bb
)));
5030 /* If basic block has predecessors or successors, redirect them. */
5031 if (remove_from_cfg_p
5032 && (EDGE_COUNT (empty_bb
->preds
) > 0
5033 || EDGE_COUNT (empty_bb
->succs
) > 0))
5038 /* We need to init PRED and SUCC before redirecting edges. */
5039 if (EDGE_COUNT (empty_bb
->preds
) > 0)
5043 gcc_assert (EDGE_COUNT (empty_bb
->preds
) == 1);
5045 e
= EDGE_PRED (empty_bb
, 0);
5046 gcc_assert (e
->src
== empty_bb
->prev_bb
5047 && (e
->flags
& EDGE_FALLTHRU
));
5049 pred
= empty_bb
->prev_bb
;
5054 if (EDGE_COUNT (empty_bb
->succs
) > 0)
5056 /* We do not check fallthruness here as above, because
5057 after removing a jump the edge may actually be not fallthru. */
5058 gcc_assert (EDGE_COUNT (empty_bb
->succs
) == 1);
5059 succ
= EDGE_SUCC (empty_bb
, 0)->dest
;
5064 if (EDGE_COUNT (empty_bb
->preds
) > 0 && succ
!= NULL
)
5066 edge e
= EDGE_PRED (empty_bb
, 0);
5068 if (e
->flags
& EDGE_FALLTHRU
)
5069 redirect_edge_succ_nodup (e
, succ
);
5071 sel_redirect_edge_and_branch (EDGE_PRED (empty_bb
, 0), succ
);
5074 if (EDGE_COUNT (empty_bb
->succs
) > 0 && pred
!= NULL
)
5076 edge e
= EDGE_SUCC (empty_bb
, 0);
5078 if (find_edge (pred
, e
->dest
) == NULL
)
5079 redirect_edge_pred (e
, pred
);
5083 /* Finish removing. */
5084 sel_remove_bb (empty_bb
, remove_from_cfg_p
);
5087 /* An implementation of create_basic_block hook, which additionally updates
5088 per-bb data structures. */
5090 sel_create_basic_block (void *headp
, void *endp
, basic_block after
)
5095 gcc_assert (flag_sel_sched_pipelining_outer_loops
5096 || last_added_blocks
== NULL
);
5098 new_bb_note
= get_bb_note_from_pool ();
5100 if (new_bb_note
== NULL_RTX
)
5101 new_bb
= orig_cfg_hooks
.create_basic_block (headp
, endp
, after
);
5104 new_bb
= create_basic_block_structure ((rtx
) headp
, (rtx
) endp
,
5105 new_bb_note
, after
);
5109 VEC_safe_push (basic_block
, heap
, last_added_blocks
, new_bb
);
5114 /* Implement sched_init_only_bb (). */
5116 sel_init_only_bb (basic_block bb
, basic_block after
)
5118 gcc_assert (after
== NULL
);
5121 rgn_make_new_region_out_of_new_block (bb
);
5124 /* Update the latch when we've splitted or merged it from FROM block to TO.
5125 This should be checked for all outer loops, too. */
5127 change_loops_latches (basic_block from
, basic_block to
)
5129 gcc_assert (from
!= to
);
5131 if (current_loop_nest
)
5135 for (loop
= current_loop_nest
; loop
; loop
= loop_outer (loop
))
5136 if (considered_for_pipelining_p (loop
) && loop
->latch
== from
)
5138 gcc_assert (loop
== current_loop_nest
);
5140 gcc_assert (loop_latch_edge (loop
));
5145 /* Splits BB on two basic blocks, adding it to the region and extending
5146 per-bb data structures. Returns the newly created bb. */
5148 sel_split_block (basic_block bb
, rtx after
)
5153 new_bb
= sched_split_block_1 (bb
, after
);
5154 sel_add_bb (new_bb
);
5156 /* This should be called after sel_add_bb, because this uses
5157 CONTAINING_RGN for the new block, which is not yet initialized.
5158 FIXME: this function may be a no-op now. */
5159 change_loops_latches (bb
, new_bb
);
5161 /* Update ORIG_BB_INDEX for insns moved into the new block. */
5162 FOR_BB_INSNS (new_bb
, insn
)
5164 EXPR_ORIG_BB_INDEX (INSN_EXPR (insn
)) = new_bb
->index
;
5166 if (sel_bb_empty_p (bb
))
5168 gcc_assert (!sel_bb_empty_p (new_bb
));
5170 /* NEW_BB has data sets that need to be updated and BB holds
5171 data sets that should be removed. Exchange these data sets
5172 so that we won't lose BB's valid data sets. */
5173 exchange_data_sets (new_bb
, bb
);
5174 free_data_sets (bb
);
5177 if (!sel_bb_empty_p (new_bb
)
5178 && bitmap_bit_p (blocks_to_reschedule
, bb
->index
))
5179 bitmap_set_bit (blocks_to_reschedule
, new_bb
->index
);
5184 /* If BB ends with a jump insn whose ID is bigger then PREV_MAX_UID, return it.
5185 Otherwise returns NULL. */
5187 check_for_new_jump (basic_block bb
, int prev_max_uid
)
5191 end
= sel_bb_end (bb
);
5192 if (end
&& INSN_UID (end
) >= prev_max_uid
)
5197 /* Look for a new jump either in FROM_BB block or in newly created JUMP_BB block.
5198 New means having UID at least equal to PREV_MAX_UID. */
5200 find_new_jump (basic_block from
, basic_block jump_bb
, int prev_max_uid
)
5204 /* Return immediately if no new insns were emitted. */
5205 if (get_max_uid () == prev_max_uid
)
5208 /* Now check both blocks for new jumps. It will ever be only one. */
5209 if ((jump
= check_for_new_jump (from
, prev_max_uid
)))
5213 && (jump
= check_for_new_jump (jump_bb
, prev_max_uid
)))
5218 /* Splits E and adds the newly created basic block to the current region.
5219 Returns this basic block. */
5221 sel_split_edge (edge e
)
5223 basic_block new_bb
, src
, other_bb
= NULL
;
5228 prev_max_uid
= get_max_uid ();
5229 new_bb
= split_edge (e
);
5231 if (flag_sel_sched_pipelining_outer_loops
5232 && current_loop_nest
)
5237 /* Some of the basic blocks might not have been added to the loop.
5238 Add them here, until this is fixed in force_fallthru. */
5240 VEC_iterate (basic_block
, last_added_blocks
, i
, bb
); i
++)
5241 if (!bb
->loop_father
)
5243 add_bb_to_loop (bb
, e
->dest
->loop_father
);
5245 gcc_assert (!other_bb
&& (new_bb
->index
!= bb
->index
));
5250 /* Add all last_added_blocks to the region. */
5253 jump
= find_new_jump (src
, new_bb
, prev_max_uid
);
5255 sel_init_new_insn (jump
, INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SIMPLEJUMP
);
5257 /* Put the correct lv set on this block. */
5258 if (other_bb
&& !sel_bb_empty_p (other_bb
))
5259 compute_live (sel_bb_head (other_bb
));
5264 /* Implement sched_create_empty_bb (). */
5266 sel_create_empty_bb (basic_block after
)
5270 new_bb
= sched_create_empty_bb_1 (after
);
5272 /* We'll explicitly initialize NEW_BB via sel_init_only_bb () a bit
5274 gcc_assert (VEC_length (basic_block
, last_added_blocks
) == 1
5275 && VEC_index (basic_block
, last_added_blocks
, 0) == new_bb
);
5277 VEC_free (basic_block
, heap
, last_added_blocks
);
5281 /* Implement sched_create_recovery_block. ORIG_INSN is where block
5282 will be splitted to insert a check. */
5284 sel_create_recovery_block (insn_t orig_insn
)
5286 basic_block first_bb
, second_bb
, recovery_block
;
5287 basic_block before_recovery
= NULL
;
5290 first_bb
= BLOCK_FOR_INSN (orig_insn
);
5291 if (sel_bb_end_p (orig_insn
))
5293 /* Avoid introducing an empty block while splitting. */
5294 gcc_assert (single_succ_p (first_bb
));
5295 second_bb
= single_succ (first_bb
);
5298 second_bb
= sched_split_block (first_bb
, orig_insn
);
5300 recovery_block
= sched_create_recovery_block (&before_recovery
);
5301 if (before_recovery
)
5302 copy_lv_set_from (before_recovery
, EXIT_BLOCK_PTR
);
5304 gcc_assert (sel_bb_empty_p (recovery_block
));
5305 sched_create_recovery_edges (first_bb
, recovery_block
, second_bb
);
5306 if (current_loops
!= NULL
)
5307 add_bb_to_loop (recovery_block
, first_bb
->loop_father
);
5309 sel_add_bb (recovery_block
);
5311 jump
= BB_END (recovery_block
);
5312 gcc_assert (sel_bb_head (recovery_block
) == jump
);
5313 sel_init_new_insn (jump
, INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SIMPLEJUMP
);
5315 return recovery_block
;
5318 /* Merge basic block B into basic block A. */
5320 sel_merge_blocks (basic_block a
, basic_block b
)
5322 sel_remove_empty_bb (b
, true, false);
5323 merge_blocks (a
, b
);
5325 change_loops_latches (b
, a
);
5328 /* A wrapper for redirect_edge_and_branch_force, which also initializes
5329 data structures for possibly created bb and insns. Returns the newly
5330 added bb or NULL, when a bb was not needed. */
5332 sel_redirect_edge_and_branch_force (edge e
, basic_block to
)
5334 basic_block jump_bb
, src
;
5338 gcc_assert (!sel_bb_empty_p (e
->src
));
5341 prev_max_uid
= get_max_uid ();
5342 jump_bb
= redirect_edge_and_branch_force (e
, to
);
5344 if (jump_bb
!= NULL
)
5345 sel_add_bb (jump_bb
);
5347 /* This function could not be used to spoil the loop structure by now,
5348 thus we don't care to update anything. But check it to be sure. */
5349 if (current_loop_nest
5351 gcc_assert (loop_latch_edge (current_loop_nest
));
5353 jump
= find_new_jump (src
, jump_bb
, prev_max_uid
);
5355 sel_init_new_insn (jump
, INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SIMPLEJUMP
);
5358 /* A wrapper for redirect_edge_and_branch. */
5360 sel_redirect_edge_and_branch (edge e
, basic_block to
)
5368 latch_edge_p
= (pipelining_p
5369 && current_loop_nest
5370 && e
== loop_latch_edge (current_loop_nest
));
5373 prev_max_uid
= get_max_uid ();
5375 redirected
= redirect_edge_and_branch (e
, to
);
5377 gcc_assert (redirected
&& last_added_blocks
== NULL
);
5379 /* When we've redirected a latch edge, update the header. */
5382 current_loop_nest
->header
= to
;
5383 gcc_assert (loop_latch_edge (current_loop_nest
));
5386 jump
= find_new_jump (src
, NULL
, prev_max_uid
);
5388 sel_init_new_insn (jump
, INSN_INIT_TODO_LUID
| INSN_INIT_TODO_SIMPLEJUMP
);
5391 /* This variable holds the cfg hooks used by the selective scheduler. */
5392 static struct cfg_hooks sel_cfg_hooks
;
5394 /* Register sel-sched cfg hooks. */
5396 sel_register_cfg_hooks (void)
5398 sched_split_block
= sel_split_block
;
5400 orig_cfg_hooks
= get_cfg_hooks ();
5401 sel_cfg_hooks
= orig_cfg_hooks
;
5403 sel_cfg_hooks
.create_basic_block
= sel_create_basic_block
;
5405 set_cfg_hooks (sel_cfg_hooks
);
5407 sched_init_only_bb
= sel_init_only_bb
;
5408 sched_split_block
= sel_split_block
;
5409 sched_create_empty_bb
= sel_create_empty_bb
;
5412 /* Unregister sel-sched cfg hooks. */
5414 sel_unregister_cfg_hooks (void)
5416 sched_create_empty_bb
= NULL
;
5417 sched_split_block
= NULL
;
5418 sched_init_only_bb
= NULL
;
5420 set_cfg_hooks (orig_cfg_hooks
);
5424 /* Emit an insn rtx based on PATTERN. If a jump insn is wanted,
5425 LABEL is where this jump should be directed. */
5427 create_insn_rtx_from_pattern (rtx pattern
, rtx label
)
5431 gcc_assert (!INSN_P (pattern
));
5435 if (label
== NULL_RTX
)
5436 insn_rtx
= emit_insn (pattern
);
5437 else if (DEBUG_INSN_P (label
))
5438 insn_rtx
= emit_debug_insn (pattern
);
5441 insn_rtx
= emit_jump_insn (pattern
);
5442 JUMP_LABEL (insn_rtx
) = label
;
5443 ++LABEL_NUSES (label
);
5448 sched_init_luids (NULL
, NULL
, NULL
, NULL
);
5449 sched_extend_target ();
5450 sched_deps_init (false);
5452 /* Initialize INSN_CODE now. */
5453 recog_memoized (insn_rtx
);
5457 /* Create a new vinsn for INSN_RTX. FORCE_UNIQUE_P is true when the vinsn
5458 must not be clonable. */
5460 create_vinsn_from_insn_rtx (rtx insn_rtx
, bool force_unique_p
)
5462 gcc_assert (INSN_P (insn_rtx
) && !INSN_IN_STREAM_P (insn_rtx
));
5464 /* If VINSN_TYPE is not USE, retain its uniqueness. */
5465 return vinsn_create (insn_rtx
, force_unique_p
);
5468 /* Create a copy of INSN_RTX. */
5470 create_copy_of_insn_rtx (rtx insn_rtx
)
5474 if (DEBUG_INSN_P (insn_rtx
))
5475 return create_insn_rtx_from_pattern (copy_rtx (PATTERN (insn_rtx
)),
5478 gcc_assert (NONJUMP_INSN_P (insn_rtx
));
5480 res
= create_insn_rtx_from_pattern (copy_rtx (PATTERN (insn_rtx
)),
5485 /* Change vinsn field of EXPR to hold NEW_VINSN. */
5487 change_vinsn_in_expr (expr_t expr
, vinsn_t new_vinsn
)
5489 vinsn_detach (EXPR_VINSN (expr
));
5491 EXPR_VINSN (expr
) = new_vinsn
;
5492 vinsn_attach (new_vinsn
);
5495 /* Helpers for global init. */
5496 /* This structure is used to be able to call existing bundling mechanism
5497 and calculate insn priorities. */
5498 static struct haifa_sched_info sched_sel_haifa_sched_info
=
5500 NULL
, /* init_ready_list */
5501 NULL
, /* can_schedule_ready_p */
5502 NULL
, /* schedule_more_p */
5503 NULL
, /* new_ready */
5504 NULL
, /* rgn_rank */
5505 sel_print_insn
, /* rgn_print_insn */
5506 contributes_to_priority
,
5507 NULL
, /* insn_finishes_block_p */
5513 NULL
, /* add_remove_insn */
5514 NULL
, /* begin_schedule_ready */
5515 NULL
, /* advance_target_bb */
5519 /* Setup special insns used in the scheduler. */
5521 setup_nop_and_exit_insns (void)
5523 gcc_assert (nop_pattern
== NULL_RTX
5524 && exit_insn
== NULL_RTX
);
5526 nop_pattern
= gen_nop ();
5529 emit_insn (nop_pattern
);
5530 exit_insn
= get_insns ();
5532 set_block_for_insn (exit_insn
, EXIT_BLOCK_PTR
);
5535 /* Free special insns used in the scheduler. */
5537 free_nop_and_exit_insns (void)
5539 exit_insn
= NULL_RTX
;
5540 nop_pattern
= NULL_RTX
;
5543 /* Setup a special vinsn used in new insns initialization. */
5545 setup_nop_vinsn (void)
5547 nop_vinsn
= vinsn_create (exit_insn
, false);
5548 vinsn_attach (nop_vinsn
);
5551 /* Free a special vinsn used in new insns initialization. */
5553 free_nop_vinsn (void)
5555 gcc_assert (VINSN_COUNT (nop_vinsn
) == 1);
5556 vinsn_detach (nop_vinsn
);
5560 /* Call a set_sched_flags hook. */
5562 sel_set_sched_flags (void)
5564 /* ??? This means that set_sched_flags were called, and we decided to
5565 support speculation. However, set_sched_flags also modifies flags
5566 on current_sched_info, doing this only at global init. And we
5567 sometimes change c_s_i later. So put the correct flags again. */
5568 if (spec_info
&& targetm
.sched
.set_sched_flags
)
5569 targetm
.sched
.set_sched_flags (spec_info
);
5572 /* Setup pointers to global sched info structures. */
5574 sel_setup_sched_infos (void)
5576 rgn_setup_common_sched_info ();
5578 memcpy (&sel_common_sched_info
, common_sched_info
,
5579 sizeof (sel_common_sched_info
));
5581 sel_common_sched_info
.fix_recovery_cfg
= NULL
;
5582 sel_common_sched_info
.add_block
= NULL
;
5583 sel_common_sched_info
.estimate_number_of_insns
5584 = sel_estimate_number_of_insns
;
5585 sel_common_sched_info
.luid_for_non_insn
= sel_luid_for_non_insn
;
5586 sel_common_sched_info
.sched_pass_id
= SCHED_SEL_PASS
;
5588 common_sched_info
= &sel_common_sched_info
;
5590 current_sched_info
= &sched_sel_haifa_sched_info
;
5591 current_sched_info
->sched_max_insns_priority
=
5592 get_rgn_sched_max_insns_priority ();
5594 sel_set_sched_flags ();
5598 /* Adds basic block BB to region RGN at the position *BB_ORD_INDEX,
5599 *BB_ORD_INDEX after that is increased. */
5601 sel_add_block_to_region (basic_block bb
, int *bb_ord_index
, int rgn
)
5603 RGN_NR_BLOCKS (rgn
) += 1;
5604 RGN_DONT_CALC_DEPS (rgn
) = 0;
5605 RGN_HAS_REAL_EBB (rgn
) = 0;
5606 CONTAINING_RGN (bb
->index
) = rgn
;
5607 BLOCK_TO_BB (bb
->index
) = *bb_ord_index
;
5608 rgn_bb_table
[RGN_BLOCKS (rgn
) + *bb_ord_index
] = bb
->index
;
5611 /* FIXME: it is true only when not scheduling ebbs. */
5612 RGN_BLOCKS (rgn
+ 1) = RGN_BLOCKS (rgn
) + RGN_NR_BLOCKS (rgn
);
5615 /* Functions to support pipelining of outer loops. */
5617 /* Creates a new empty region and returns it's number. */
5619 sel_create_new_region (void)
5621 int new_rgn_number
= nr_regions
;
5623 RGN_NR_BLOCKS (new_rgn_number
) = 0;
5625 /* FIXME: This will work only when EBBs are not created. */
5626 if (new_rgn_number
!= 0)
5627 RGN_BLOCKS (new_rgn_number
) = RGN_BLOCKS (new_rgn_number
- 1) +
5628 RGN_NR_BLOCKS (new_rgn_number
- 1);
5630 RGN_BLOCKS (new_rgn_number
) = 0;
5632 /* Set the blocks of the next region so the other functions may
5633 calculate the number of blocks in the region. */
5634 RGN_BLOCKS (new_rgn_number
+ 1) = RGN_BLOCKS (new_rgn_number
) +
5635 RGN_NR_BLOCKS (new_rgn_number
);
5639 return new_rgn_number
;
5642 /* If X has a smaller topological sort number than Y, returns -1;
5643 if greater, returns 1. */
5645 bb_top_order_comparator (const void *x
, const void *y
)
5647 basic_block bb1
= *(const basic_block
*) x
;
5648 basic_block bb2
= *(const basic_block
*) y
;
5650 gcc_assert (bb1
== bb2
5651 || rev_top_order_index
[bb1
->index
]
5652 != rev_top_order_index
[bb2
->index
]);
5654 /* It's a reverse topological order in REV_TOP_ORDER_INDEX, so
5655 bbs with greater number should go earlier. */
5656 if (rev_top_order_index
[bb1
->index
] > rev_top_order_index
[bb2
->index
])
5662 /* Create a region for LOOP and return its number. If we don't want
5663 to pipeline LOOP, return -1. */
5665 make_region_from_loop (struct loop
*loop
)
5668 int new_rgn_number
= -1;
5671 /* Basic block index, to be assigned to BLOCK_TO_BB. */
5672 int bb_ord_index
= 0;
5673 basic_block
*loop_blocks
;
5674 basic_block preheader_block
;
5677 > (unsigned) PARAM_VALUE (PARAM_MAX_PIPELINE_REGION_BLOCKS
))
5680 /* Don't pipeline loops whose latch belongs to some of its inner loops. */
5681 for (inner
= loop
->inner
; inner
; inner
= inner
->inner
)
5682 if (flow_bb_inside_loop_p (inner
, loop
->latch
))
5685 loop
->ninsns
= num_loop_insns (loop
);
5686 if ((int) loop
->ninsns
> PARAM_VALUE (PARAM_MAX_PIPELINE_REGION_INSNS
))
5689 loop_blocks
= get_loop_body_in_custom_order (loop
, bb_top_order_comparator
);
5691 for (i
= 0; i
< loop
->num_nodes
; i
++)
5692 if (loop_blocks
[i
]->flags
& BB_IRREDUCIBLE_LOOP
)
5698 preheader_block
= loop_preheader_edge (loop
)->src
;
5699 gcc_assert (preheader_block
);
5700 gcc_assert (loop_blocks
[0] == loop
->header
);
5702 new_rgn_number
= sel_create_new_region ();
5704 sel_add_block_to_region (preheader_block
, &bb_ord_index
, new_rgn_number
);
5705 SET_BIT (bbs_in_loop_rgns
, preheader_block
->index
);
5707 for (i
= 0; i
< loop
->num_nodes
; i
++)
5709 /* Add only those blocks that haven't been scheduled in the inner loop.
5710 The exception is the basic blocks with bookkeeping code - they should
5711 be added to the region (and they actually don't belong to the loop
5712 body, but to the region containing that loop body). */
5714 gcc_assert (new_rgn_number
>= 0);
5716 if (! TEST_BIT (bbs_in_loop_rgns
, loop_blocks
[i
]->index
))
5718 sel_add_block_to_region (loop_blocks
[i
], &bb_ord_index
,
5720 SET_BIT (bbs_in_loop_rgns
, loop_blocks
[i
]->index
);
5725 MARK_LOOP_FOR_PIPELINING (loop
);
5727 return new_rgn_number
;
5730 /* Create a new region from preheader blocks LOOP_BLOCKS. */
5732 make_region_from_loop_preheader (VEC(basic_block
, heap
) **loop_blocks
)
5735 int new_rgn_number
= -1;
5738 /* Basic block index, to be assigned to BLOCK_TO_BB. */
5739 int bb_ord_index
= 0;
5741 new_rgn_number
= sel_create_new_region ();
5743 for (i
= 0; VEC_iterate (basic_block
, *loop_blocks
, i
, bb
); i
++)
5745 gcc_assert (new_rgn_number
>= 0);
5747 sel_add_block_to_region (bb
, &bb_ord_index
, new_rgn_number
);
5750 VEC_free (basic_block
, heap
, *loop_blocks
);
5751 gcc_assert (*loop_blocks
== NULL
);
5755 /* Create region(s) from loop nest LOOP, such that inner loops will be
5756 pipelined before outer loops. Returns true when a region for LOOP
5759 make_regions_from_loop_nest (struct loop
*loop
)
5761 struct loop
*cur_loop
;
5764 /* Traverse all inner nodes of the loop. */
5765 for (cur_loop
= loop
->inner
; cur_loop
; cur_loop
= cur_loop
->next
)
5766 if (! TEST_BIT (bbs_in_loop_rgns
, cur_loop
->header
->index
))
5769 /* At this moment all regular inner loops should have been pipelined.
5770 Try to create a region from this loop. */
5771 rgn_number
= make_region_from_loop (loop
);
5776 VEC_safe_push (loop_p
, heap
, loop_nests
, loop
);
5780 /* Initalize data structures needed. */
5782 sel_init_pipelining (void)
5784 /* Collect loop information to be used in outer loops pipelining. */
5785 loop_optimizer_init (LOOPS_HAVE_PREHEADERS
5786 | LOOPS_HAVE_FALLTHRU_PREHEADERS
5787 | LOOPS_HAVE_RECORDED_EXITS
5788 | LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS
);
5789 current_loop_nest
= NULL
;
5791 bbs_in_loop_rgns
= sbitmap_alloc (last_basic_block
);
5792 sbitmap_zero (bbs_in_loop_rgns
);
5794 recompute_rev_top_order ();
5797 /* Returns a struct loop for region RGN. */
5799 get_loop_nest_for_rgn (unsigned int rgn
)
5801 /* Regions created with extend_rgns don't have corresponding loop nests,
5802 because they don't represent loops. */
5803 if (rgn
< VEC_length (loop_p
, loop_nests
))
5804 return VEC_index (loop_p
, loop_nests
, rgn
);
5809 /* True when LOOP was included into pipelining regions. */
5811 considered_for_pipelining_p (struct loop
*loop
)
5813 if (loop_depth (loop
) == 0)
5816 /* Now, the loop could be too large or irreducible. Check whether its
5817 region is in LOOP_NESTS.
5818 We determine the region number of LOOP as the region number of its
5819 latch. We can't use header here, because this header could be
5820 just removed preheader and it will give us the wrong region number.
5821 Latch can't be used because it could be in the inner loop too. */
5822 if (LOOP_MARKED_FOR_PIPELINING_P (loop
) && pipelining_p
)
5824 int rgn
= CONTAINING_RGN (loop
->latch
->index
);
5826 gcc_assert ((unsigned) rgn
< VEC_length (loop_p
, loop_nests
));
5833 /* Makes regions from the rest of the blocks, after loops are chosen
5836 make_regions_from_the_rest (void)
5847 /* Index in rgn_bb_table where to start allocating new regions. */
5848 cur_rgn_blocks
= nr_regions
? RGN_BLOCKS (nr_regions
) : 0;
5850 /* Make regions from all the rest basic blocks - those that don't belong to
5851 any loop or belong to irreducible loops. Prepare the data structures
5854 /* LOOP_HDR[I] == -1 if I-th bb doesn't belong to any loop,
5855 LOOP_HDR[I] == LOOP_HDR[J] iff basic blocks I and J reside within the same
5857 loop_hdr
= XNEWVEC (int, last_basic_block
);
5858 degree
= XCNEWVEC (int, last_basic_block
);
5861 /* For each basic block that belongs to some loop assign the number
5862 of innermost loop it belongs to. */
5863 for (i
= 0; i
< last_basic_block
; i
++)
5868 if (bb
->loop_father
&& !bb
->loop_father
->num
== 0
5869 && !(bb
->flags
& BB_IRREDUCIBLE_LOOP
))
5870 loop_hdr
[bb
->index
] = bb
->loop_father
->num
;
5873 /* For each basic block degree is calculated as the number of incoming
5874 edges, that are going out of bbs that are not yet scheduled.
5875 The basic blocks that are scheduled have degree value of zero. */
5878 degree
[bb
->index
] = 0;
5880 if (!TEST_BIT (bbs_in_loop_rgns
, bb
->index
))
5882 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
5883 if (!TEST_BIT (bbs_in_loop_rgns
, e
->src
->index
))
5884 degree
[bb
->index
]++;
5887 degree
[bb
->index
] = -1;
5890 extend_rgns (degree
, &cur_rgn_blocks
, bbs_in_loop_rgns
, loop_hdr
);
5892 /* Any block that did not end up in a region is placed into a region
5895 if (degree
[bb
->index
] >= 0)
5897 rgn_bb_table
[cur_rgn_blocks
] = bb
->index
;
5898 RGN_NR_BLOCKS (nr_regions
) = 1;
5899 RGN_BLOCKS (nr_regions
) = cur_rgn_blocks
++;
5900 RGN_DONT_CALC_DEPS (nr_regions
) = 0;
5901 RGN_HAS_REAL_EBB (nr_regions
) = 0;
5902 CONTAINING_RGN (bb
->index
) = nr_regions
++;
5903 BLOCK_TO_BB (bb
->index
) = 0;
5910 /* Free data structures used in pipelining of loops. */
5911 void sel_finish_pipelining (void)
5916 /* Release aux fields so we don't free them later by mistake. */
5917 FOR_EACH_LOOP (li
, loop
, 0)
5920 loop_optimizer_finalize ();
5922 VEC_free (loop_p
, heap
, loop_nests
);
5924 free (rev_top_order_index
);
5925 rev_top_order_index
= NULL
;
5928 /* This function replaces the find_rgns when
5929 FLAG_SEL_SCHED_PIPELINING_OUTER_LOOPS is set. */
5931 sel_find_rgns (void)
5933 sel_init_pipelining ();
5941 FOR_EACH_LOOP (li
, loop
, (flag_sel_sched_pipelining_outer_loops
5943 : LI_ONLY_INNERMOST
))
5944 make_regions_from_loop_nest (loop
);
5947 /* Make regions from all the rest basic blocks and schedule them.
5948 These blocks include blocks that don't belong to any loop or belong
5949 to irreducible loops. */
5950 make_regions_from_the_rest ();
5952 /* We don't need bbs_in_loop_rgns anymore. */
5953 sbitmap_free (bbs_in_loop_rgns
);
5954 bbs_in_loop_rgns
= NULL
;
5957 /* Adds the preheader blocks from previous loop to current region taking
5958 it from LOOP_PREHEADER_BLOCKS (current_loop_nest).
5959 This function is only used with -fsel-sched-pipelining-outer-loops. */
5961 sel_add_loop_preheaders (void)
5965 VEC(basic_block
, heap
) *preheader_blocks
5966 = LOOP_PREHEADER_BLOCKS (current_loop_nest
);
5969 VEC_iterate (basic_block
, preheader_blocks
, i
, bb
);
5973 VEC_free (basic_block
, heap
, preheader_blocks
);
5976 /* While pipelining outer loops, returns TRUE if BB is a loop preheader.
5977 Please note that the function should also work when pipelining_p is
5978 false, because it is used when deciding whether we should or should
5979 not reschedule pipelined code. */
5981 sel_is_loop_preheader_p (basic_block bb
)
5983 if (current_loop_nest
)
5987 if (preheader_removed
)
5990 /* Preheader is the first block in the region. */
5991 if (BLOCK_TO_BB (bb
->index
) == 0)
5994 /* We used to find a preheader with the topological information.
5995 Check that the above code is equivalent to what we did before. */
5997 if (in_current_region_p (current_loop_nest
->header
))
5998 gcc_assert (!(BLOCK_TO_BB (bb
->index
)
5999 < BLOCK_TO_BB (current_loop_nest
->header
->index
)));
6001 /* Support the situation when the latch block of outer loop
6002 could be from here. */
6003 for (outer
= loop_outer (current_loop_nest
);
6005 outer
= loop_outer (outer
))
6006 if (considered_for_pipelining_p (outer
) && outer
->latch
== bb
)
6013 /* Checks whether JUMP leads to basic block DEST_BB and no other blocks. */
6015 jump_leads_only_to_bb_p (insn_t jump
, basic_block dest_bb
)
6017 basic_block jump_bb
= BLOCK_FOR_INSN (jump
);
6019 /* It is not jump, jump with side-effects or jump can lead to several
6021 if (!onlyjump_p (jump
)
6022 || !any_uncondjump_p (jump
))
6025 /* Several outgoing edges, abnormal edge or destination of jump is
6027 if (EDGE_COUNT (jump_bb
->succs
) != 1
6028 || EDGE_SUCC (jump_bb
, 0)->flags
& EDGE_ABNORMAL
6029 || EDGE_SUCC (jump_bb
, 0)->dest
!= dest_bb
)
6032 /* If not anything of the upper. */
6036 /* Removes the loop preheader from the current region and saves it in
6037 PREHEADER_BLOCKS of the father loop, so they will be added later to
6038 region that represents an outer loop. */
6040 sel_remove_loop_preheader (void)
6043 int cur_rgn
= CONTAINING_RGN (BB_TO_BLOCK (0));
6045 bool all_empty_p
= true;
6046 VEC(basic_block
, heap
) *preheader_blocks
6047 = LOOP_PREHEADER_BLOCKS (loop_outer (current_loop_nest
));
6049 gcc_assert (current_loop_nest
);
6050 old_len
= VEC_length (basic_block
, preheader_blocks
);
6052 /* Add blocks that aren't within the current loop to PREHEADER_BLOCKS. */
6053 for (i
= 0; i
< RGN_NR_BLOCKS (cur_rgn
); i
++)
6055 bb
= BASIC_BLOCK (BB_TO_BLOCK (i
));
6057 /* If the basic block belongs to region, but doesn't belong to
6058 corresponding loop, then it should be a preheader. */
6059 if (sel_is_loop_preheader_p (bb
))
6061 VEC_safe_push (basic_block
, heap
, preheader_blocks
, bb
);
6062 if (BB_END (bb
) != bb_note (bb
))
6063 all_empty_p
= false;
6067 /* Remove these blocks only after iterating over the whole region. */
6068 for (i
= VEC_length (basic_block
, preheader_blocks
) - 1;
6072 bb
= VEC_index (basic_block
, preheader_blocks
, i
);
6073 sel_remove_bb (bb
, false);
6076 if (!considered_for_pipelining_p (loop_outer (current_loop_nest
)))
6079 /* Immediately create new region from preheader. */
6080 make_region_from_loop_preheader (&preheader_blocks
);
6083 /* If all preheader blocks are empty - dont create new empty region.
6084 Instead, remove them completely. */
6085 for (i
= 0; VEC_iterate (basic_block
, preheader_blocks
, i
, bb
); i
++)
6089 basic_block prev_bb
= bb
->prev_bb
, next_bb
= bb
->next_bb
;
6091 /* Redirect all incoming edges to next basic block. */
6092 for (ei
= ei_start (bb
->preds
); (e
= ei_safe_edge (ei
)); )
6094 if (! (e
->flags
& EDGE_FALLTHRU
))
6095 redirect_edge_and_branch (e
, bb
->next_bb
);
6097 redirect_edge_succ (e
, bb
->next_bb
);
6099 gcc_assert (BB_NOTE_LIST (bb
) == NULL
);
6100 delete_and_free_basic_block (bb
);
6102 /* Check if after deleting preheader there is a nonconditional
6103 jump in PREV_BB that leads to the next basic block NEXT_BB.
6104 If it is so - delete this jump and clear data sets of its
6105 basic block if it becomes empty. */
6106 if (next_bb
->prev_bb
== prev_bb
6107 && prev_bb
!= ENTRY_BLOCK_PTR
6108 && jump_leads_only_to_bb_p (BB_END (prev_bb
), next_bb
))
6110 redirect_edge_and_branch (EDGE_SUCC (prev_bb
, 0), next_bb
);
6111 if (BB_END (prev_bb
) == bb_note (prev_bb
))
6112 free_data_sets (prev_bb
);
6116 VEC_free (basic_block
, heap
, preheader_blocks
);
6119 /* Store preheader within the father's loop structure. */
6120 SET_LOOP_PREHEADER_BLOCKS (loop_outer (current_loop_nest
),