1 /* Graphite polyhedral representation.
2 Copyright (C) 2009 Free Software Foundation, Inc.
3 Contributed by Sebastian Pop <sebastian.pop@amd.com> and
4 Tobias Grosser <grosser@fim.uni-passau.de>.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
29 #include "basic-block.h"
30 #include "diagnostic.h"
31 #include "tree-flow.h"
33 #include "tree-dump.h"
36 #include "tree-chrec.h"
37 #include "tree-data-ref.h"
38 #include "tree-scalar-evolution.h"
39 #include "tree-pass.h"
41 #include "value-prof.h"
42 #include "pointer-set.h"
47 #include "cloog/cloog.h"
50 #include "graphite-ppl.h"
52 #include "graphite-poly.h"
53 #include "graphite-dependences.h"
55 /* Return the maximal loop depth in SCOP. */
58 scop_max_loop_depth (scop_p scop
)
64 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
66 int nb_loops
= pbb_dim_iter_domain (pbb
);
67 if (max_nb_loops
< nb_loops
)
68 max_nb_loops
= nb_loops
;
74 /* Extend the scattering matrix of PBB to MAX_SCATTERING scattering
78 extend_scattering (poly_bb_p pbb
, int max_scattering
)
80 ppl_dimension_type nb_old_dims
, nb_new_dims
;
82 ppl_Coefficient_t coef
;
85 nb_added_dims
= max_scattering
- pbb_nb_scattering_transform (pbb
);
87 value_set_si (one
, 1);
88 ppl_new_Coefficient (&coef
);
89 ppl_assign_Coefficient_from_mpz_t (coef
, one
);
91 gcc_assert (nb_added_dims
>= 0);
93 nb_old_dims
= pbb_nb_scattering_transform (pbb
) + pbb_dim_iter_domain (pbb
)
94 + scop_nb_params (PBB_SCOP (pbb
));
95 nb_new_dims
= nb_old_dims
+ nb_added_dims
;
97 ppl_insert_dimensions (PBB_TRANSFORMED_SCATTERING (pbb
),
98 pbb_nb_scattering_transform (pbb
), nb_added_dims
);
99 PBB_NB_SCATTERING_TRANSFORM (pbb
) += nb_added_dims
;
101 /* Add identity matrix for the added dimensions. */
102 for (i
= max_scattering
- nb_added_dims
; i
< max_scattering
; i
++)
104 ppl_Constraint_t cstr
;
105 ppl_Linear_Expression_t expr
;
107 ppl_new_Linear_Expression_with_dimension (&expr
, nb_new_dims
);
108 ppl_Linear_Expression_add_to_coefficient (expr
, i
, coef
);
109 ppl_new_Constraint (&cstr
, expr
, PPL_CONSTRAINT_TYPE_EQUAL
);
110 ppl_Polyhedron_add_constraint (PBB_TRANSFORMED_SCATTERING (pbb
), cstr
);
111 ppl_delete_Constraint (cstr
);
112 ppl_delete_Linear_Expression (expr
);
115 ppl_delete_Coefficient (coef
);
119 /* All scattering matrices in SCOP will have the same number of scattering
123 unify_scattering_dimensions (scop_p scop
)
127 graphite_dim_t max_scattering
= 0;
129 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
130 max_scattering
= MAX (pbb_nb_scattering_transform (pbb
), max_scattering
);
132 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
133 extend_scattering (pbb
, max_scattering
);
135 return max_scattering
;
138 /* Prints to FILE the scattering function of PBB. */
141 print_scattering_function (FILE *file
, poly_bb_p pbb
)
145 if (!PBB_TRANSFORMED (pbb
))
148 fprintf (file
, "scattering bb_%d (\n", pbb_index (pbb
));
149 fprintf (file
, "# eq");
151 for (i
= 0; i
< pbb_nb_scattering_transform (pbb
); i
++)
152 fprintf (file
, " s%d", (int) i
);
154 for (i
= 0; i
< pbb_nb_local_vars (pbb
); i
++)
155 fprintf (file
, " lv%d", (int) i
);
157 for (i
= 0; i
< pbb_dim_iter_domain (pbb
); i
++)
158 fprintf (file
, " i%d", (int) i
);
160 for (i
= 0; i
< pbb_nb_params (pbb
); i
++)
161 fprintf (file
, " p%d", (int) i
);
163 fprintf (file
, " cst\n");
165 ppl_print_polyhedron_matrix (file
, PBB_TRANSFORMED_SCATTERING (pbb
));
167 fprintf (file
, ")\n");
170 /* Prints to FILE the iteration domain of PBB. */
173 print_iteration_domain (FILE *file
, poly_bb_p pbb
)
175 print_pbb_domain (file
, pbb
);
178 /* Prints to FILE the scattering functions of every PBB of SCOP. */
181 print_scattering_functions (FILE *file
, scop_p scop
)
186 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
187 print_scattering_function (file
, pbb
);
190 /* Prints to FILE the iteration domains of every PBB of SCOP. */
193 print_iteration_domains (FILE *file
, scop_p scop
)
198 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
199 print_iteration_domain (file
, pbb
);
202 /* Prints to STDERR the scattering function of PBB. */
205 debug_scattering_function (poly_bb_p pbb
)
207 print_scattering_function (stderr
, pbb
);
210 /* Prints to STDERR the iteration domain of PBB. */
213 debug_iteration_domain (poly_bb_p pbb
)
215 print_iteration_domain (stderr
, pbb
);
218 /* Prints to STDERR the scattering functions of every PBB of SCOP. */
221 debug_scattering_functions (scop_p scop
)
223 print_scattering_functions (stderr
, scop
);
226 /* Prints to STDERR the iteration domains of every PBB of SCOP. */
229 debug_iteration_domains (scop_p scop
)
231 print_iteration_domains (stderr
, scop
);
234 /* Apply graphite transformations to all the basic blocks of SCOP. */
237 apply_poly_transforms (scop_p scop
)
239 bool transform_done
= false;
241 /* Generate code even if we did not apply any real transformation.
242 This also allows to check the performance for the identity
243 transformation: GIMPLE -> GRAPHITE -> GIMPLE
244 Keep in mind that CLooG optimizes in control, so the loop structure
245 may change, even if we only use -fgraphite-identity. */
246 if (flag_graphite_identity
)
247 transform_done
= true;
249 if (flag_loop_parallelize_all
)
250 transform_done
= true;
254 transform_done
|= scop_do_strip_mine (scop
);
255 transform_done
|= scop_do_interchange (scop
);
259 if (flag_loop_strip_mine
)
260 transform_done
|= scop_do_strip_mine (scop
);
262 if (flag_loop_interchange
)
263 transform_done
|= scop_do_interchange (scop
);
266 return transform_done
;
269 /* Returns true when it PDR1 is a duplicate of PDR2: same PBB, and
270 their ACCESSES, TYPE, and NB_SUBSCRIPTS are the same. */
273 can_collapse_pdrs (poly_dr_p pdr1
, poly_dr_p pdr2
)
276 ppl_Pointset_Powerset_C_Polyhedron_t af1
, af2
, diff
;
278 if (PDR_PBB (pdr1
) != PDR_PBB (pdr2
)
279 || PDR_NB_SUBSCRIPTS (pdr1
) != PDR_NB_SUBSCRIPTS (pdr2
)
280 || PDR_TYPE (pdr1
) != PDR_TYPE (pdr2
))
283 af1
= PDR_ACCESSES (pdr1
);
284 af2
= PDR_ACCESSES (pdr2
);
285 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
287 ppl_Pointset_Powerset_C_Polyhedron_difference_assign (diff
, af2
);
289 res
= ppl_Pointset_Powerset_C_Polyhedron_is_empty (diff
);
290 ppl_delete_Pointset_Powerset_C_Polyhedron (diff
);
294 /* Removes duplicated data references in PBB. */
297 pbb_remove_duplicate_pdrs (poly_bb_p pbb
)
300 poly_dr_p pdr1
, pdr2
;
301 unsigned n
= VEC_length (poly_dr_p
, PBB_DRS (pbb
));
302 VEC (poly_dr_p
, heap
) *collapsed
= VEC_alloc (poly_dr_p
, heap
, n
);
304 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr1
); i
++)
305 for (j
= 0; VEC_iterate (poly_dr_p
, collapsed
, j
, pdr2
); j
++)
306 if (!can_collapse_pdrs (pdr1
, pdr2
))
307 VEC_quick_push (poly_dr_p
, collapsed
, pdr1
);
309 VEC_free (poly_dr_p
, heap
, collapsed
);
310 PBB_PDR_DUPLICATES_REMOVED (pbb
) = true;
313 /* Create a new polyhedral data reference and add it to PBB. It is
314 defined by its ACCESSES, its TYPE, and the number of subscripts
318 new_poly_dr (poly_bb_p pbb
, int dr_base_object_set
,
319 ppl_Pointset_Powerset_C_Polyhedron_t accesses
,
320 enum poly_dr_type type
, void *cdr
, graphite_dim_t nb_subscripts
)
323 poly_dr_p pdr
= XNEW (struct poly_dr
);
326 PDR_BASE_OBJECT_SET (pdr
) = dr_base_object_set
;
327 PDR_NB_REFS (pdr
) = 1;
329 PDR_ACCESSES (pdr
) = accesses
;
330 PDR_TYPE (pdr
) = type
;
332 PDR_NB_SUBSCRIPTS (pdr
) = nb_subscripts
;
333 VEC_safe_push (poly_dr_p
, heap
, PBB_DRS (pbb
), pdr
);
336 /* Free polyhedral data reference PDR. */
339 free_poly_dr (poly_dr_p pdr
)
341 ppl_delete_Pointset_Powerset_C_Polyhedron (PDR_ACCESSES (pdr
));
345 /* Create a new polyhedral black box. */
348 new_poly_bb (scop_p scop
, void *black_box
, bool reduction
)
350 poly_bb_p pbb
= XNEW (struct poly_bb
);
352 PBB_DOMAIN (pbb
) = NULL
;
353 PBB_SCOP (pbb
) = scop
;
354 pbb_set_black_box (pbb
, black_box
);
355 PBB_TRANSFORMED (pbb
) = NULL
;
356 PBB_SAVED (pbb
) = NULL
;
357 PBB_ORIGINAL (pbb
) = NULL
;
358 PBB_DRS (pbb
) = VEC_alloc (poly_dr_p
, heap
, 3);
359 PBB_IS_REDUCTION (pbb
) = reduction
;
360 PBB_PDR_DUPLICATES_REMOVED (pbb
) = false;
361 VEC_safe_push (poly_bb_p
, heap
, SCOP_BBS (scop
), pbb
);
364 /* Free polyhedral black box. */
367 free_poly_bb (poly_bb_p pbb
)
372 ppl_delete_Pointset_Powerset_C_Polyhedron (PBB_DOMAIN (pbb
));
374 if (PBB_TRANSFORMED (pbb
))
375 poly_scattering_free (PBB_TRANSFORMED (pbb
));
378 poly_scattering_free (PBB_SAVED (pbb
));
380 if (PBB_ORIGINAL (pbb
))
381 poly_scattering_free (PBB_ORIGINAL (pbb
));
384 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
387 VEC_free (poly_dr_p
, heap
, PBB_DRS (pbb
));
392 print_pdr_access_layout (FILE *file
, poly_dr_p pdr
)
396 fprintf (file
, "# eq");
398 for (i
= 0; i
< pdr_dim_iter_domain (pdr
); i
++)
399 fprintf (file
, " i%d", (int) i
);
401 for (i
= 0; i
< pdr_nb_params (pdr
); i
++)
402 fprintf (file
, " p%d", (int) i
);
404 fprintf (file
, " alias");
406 for (i
= 0; i
< PDR_NB_SUBSCRIPTS (pdr
); i
++)
407 fprintf (file
, " sub%d", (int) i
);
409 fprintf (file
, " cst\n");
412 /* Prints to FILE the polyhedral data reference PDR. */
415 print_pdr (FILE *file
, poly_dr_p pdr
)
417 fprintf (file
, "pdr_%d (", PDR_ID (pdr
));
419 switch (PDR_TYPE (pdr
))
422 fprintf (file
, "read \n");
426 fprintf (file
, "write \n");
430 fprintf (file
, "may_write \n");
437 dump_data_reference (file
, (data_reference_p
) PDR_CDR (pdr
));
439 fprintf (file
, "data accesses (\n");
440 print_pdr_access_layout (file
, pdr
);
441 ppl_print_powerset_matrix (file
, PDR_ACCESSES (pdr
));
442 fprintf (file
, ")\n");
444 fprintf (file
, ")\n");
447 /* Prints to STDERR the polyhedral data reference PDR. */
450 debug_pdr (poly_dr_p pdr
)
452 print_pdr (stderr
, pdr
);
455 /* Creates a new SCOP containing REGION. */
458 new_scop (void *region
)
460 scop_p scop
= XNEW (struct scop
);
462 SCOP_CONTEXT (scop
) = NULL
;
463 scop_set_region (scop
, region
);
464 SCOP_BBS (scop
) = VEC_alloc (poly_bb_p
, heap
, 3);
465 SCOP_ORIGINAL_PDDRS (scop
) = htab_create (10, hash_poly_ddr_p
,
466 eq_poly_ddr_p
, free_poly_ddr
);
467 SCOP_ORIGINAL_SCHEDULE (scop
) = NULL
;
468 SCOP_TRANSFORMED_SCHEDULE (scop
) = NULL
;
469 SCOP_SAVED_SCHEDULE (scop
) = NULL
;
476 free_scop (scop_p scop
)
481 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
484 VEC_free (poly_bb_p
, heap
, SCOP_BBS (scop
));
486 if (SCOP_CONTEXT (scop
))
487 ppl_delete_Pointset_Powerset_C_Polyhedron (SCOP_CONTEXT (scop
));
489 htab_delete (SCOP_ORIGINAL_PDDRS (scop
));
490 free_lst (SCOP_ORIGINAL_SCHEDULE (scop
));
491 free_lst (SCOP_TRANSFORMED_SCHEDULE (scop
));
492 free_lst (SCOP_SAVED_SCHEDULE (scop
));
496 /* Print to FILE the domain of PBB. */
499 print_pbb_domain (FILE *file
, poly_bb_p pbb
)
502 gimple_bb_p gbb
= PBB_BLACK_BOX (pbb
);
504 if (!PBB_DOMAIN (pbb
))
507 fprintf (file
, "domains bb_%d (\n", GBB_BB (gbb
)->index
);
508 fprintf (file
, "# eq");
510 for (i
= 0; i
< pbb_dim_iter_domain (pbb
); i
++)
511 fprintf (file
, " i%d", (int) i
);
513 for (i
= 0; i
< pbb_nb_params (pbb
); i
++)
514 fprintf (file
, " p%d", (int) i
);
516 fprintf (file
, " cst\n");
518 if (PBB_DOMAIN (pbb
))
519 ppl_print_powerset_matrix (file
, PBB_DOMAIN (pbb
));
521 fprintf (file
, ")\n");
524 /* Dump the cases of a graphite basic block GBB on FILE. */
527 dump_gbb_cases (FILE *file
, gimple_bb_p gbb
)
531 VEC (gimple
, heap
) *cases
;
536 cases
= GBB_CONDITION_CASES (gbb
);
537 if (VEC_empty (gimple
, cases
))
540 fprintf (file
, "cases bb_%d (", GBB_BB (gbb
)->index
);
542 for (i
= 0; VEC_iterate (gimple
, cases
, i
, stmt
); i
++)
543 print_gimple_stmt (file
, stmt
, 0, 0);
545 fprintf (file
, ")\n");
548 /* Dump conditions of a graphite basic block GBB on FILE. */
551 dump_gbb_conditions (FILE *file
, gimple_bb_p gbb
)
555 VEC (gimple
, heap
) *conditions
;
560 conditions
= GBB_CONDITIONS (gbb
);
561 if (VEC_empty (gimple
, conditions
))
564 fprintf (file
, "conditions bb_%d (", GBB_BB (gbb
)->index
);
566 for (i
= 0; VEC_iterate (gimple
, conditions
, i
, stmt
); i
++)
567 print_gimple_stmt (file
, stmt
, 0, 0);
569 fprintf (file
, ")\n");
572 /* Print to FILE all the data references of PBB. */
575 print_pdrs (FILE *file
, poly_bb_p pbb
)
580 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
581 print_pdr (file
, pdr
);
584 /* Print to STDERR all the data references of PBB. */
587 debug_pdrs (poly_bb_p pbb
)
589 print_pdrs (stderr
, pbb
);
592 /* Print to FILE the domain and scattering function of PBB. */
595 print_pbb (FILE *file
, poly_bb_p pbb
)
597 fprintf (file
, "pbb_%d (\n", pbb_index (pbb
));
598 dump_gbb_conditions (file
, PBB_BLACK_BOX (pbb
));
599 dump_gbb_cases (file
, PBB_BLACK_BOX (pbb
));
600 print_pdrs (file
, pbb
);
601 print_pbb_domain (file
, pbb
);
602 print_scattering_function (file
, pbb
);
603 fprintf (file
, ")\n");
606 /* Print to FILE the parameters of SCOP. */
609 print_scop_params (FILE *file
, scop_p scop
)
614 fprintf (file
, "parameters (\n");
615 for (i
= 0; VEC_iterate (tree
, SESE_PARAMS (SCOP_REGION (scop
)), i
, t
); i
++)
617 fprintf (file
, "p_%d -> ", i
);
618 print_generic_expr (file
, t
, 0);
619 fprintf (file
, "\n");
621 fprintf (file
, ")\n");
624 /* Print to FILE the context of SCoP. */
626 print_scop_context (FILE *file
, scop_p scop
)
630 fprintf (file
, "context (\n");
631 fprintf (file
, "# eq");
633 for (i
= 0; i
< scop_nb_params (scop
); i
++)
634 fprintf (file
, " p%d", (int) i
);
636 fprintf (file
, " cst\n");
638 if (SCOP_CONTEXT (scop
))
639 ppl_print_powerset_matrix (file
, SCOP_CONTEXT (scop
));
641 fprintf (file
, ")\n");
644 /* Print to FILE the SCOP. */
647 print_scop (FILE *file
, scop_p scop
)
652 fprintf (file
, "scop (\n");
653 print_scop_params (file
, scop
);
654 print_scop_context (file
, scop
);
656 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
657 print_pbb (file
, pbb
);
659 fprintf (file
, "original_lst (\n");
660 print_lst (file
, SCOP_ORIGINAL_SCHEDULE (scop
), 0);
661 fprintf (file
, ")\n");
663 fprintf (file
, "transformed_lst (\n");
664 print_lst (file
, SCOP_TRANSFORMED_SCHEDULE (scop
), 0);
665 fprintf (file
, ")\n");
667 fprintf (file
, ")\n");
670 /* Print to STDERR the domain of PBB. */
673 debug_pbb_domain (poly_bb_p pbb
)
675 print_pbb_domain (stderr
, pbb
);
678 /* Print to FILE the domain and scattering function of PBB. */
681 debug_pbb (poly_bb_p pbb
)
683 print_pbb (stderr
, pbb
);
686 /* Print to STDERR the context of SCOP. */
689 debug_scop_context (scop_p scop
)
691 print_scop_context (stderr
, scop
);
694 /* Print to STDERR the SCOP. */
697 debug_scop (scop_p scop
)
699 print_scop (stderr
, scop
);
702 /* Print to STDERR the parameters of SCOP. */
705 debug_scop_params (scop_p scop
)
707 print_scop_params (stderr
, scop
);
711 /* The dimension in the transformed scattering polyhedron of PBB
712 containing the scattering iterator for the loop at depth LOOP_DEPTH. */
715 psct_scattering_dim_for_loop_depth (poly_bb_p pbb
, graphite_dim_t loop_depth
)
717 ppl_const_Constraint_System_t pcs
;
718 ppl_Constraint_System_const_iterator_t cit
, cend
;
719 ppl_const_Constraint_t cstr
;
720 ppl_Polyhedron_t ph
= PBB_TRANSFORMED_SCATTERING (pbb
);
721 ppl_dimension_type iter
= psct_iterator_dim (pbb
, loop_depth
);
722 ppl_Linear_Expression_t expr
;
723 ppl_Coefficient_t coef
;
728 ppl_new_Coefficient (&coef
);
729 ppl_Polyhedron_get_constraints (ph
, &pcs
);
730 ppl_new_Constraint_System_const_iterator (&cit
);
731 ppl_new_Constraint_System_const_iterator (&cend
);
733 for (ppl_Constraint_System_begin (pcs
, cit
),
734 ppl_Constraint_System_end (pcs
, cend
);
735 !ppl_Constraint_System_const_iterator_equal_test (cit
, cend
);
736 ppl_Constraint_System_const_iterator_increment (cit
))
738 ppl_Constraint_System_const_iterator_dereference (cit
, &cstr
);
739 ppl_new_Linear_Expression_from_Constraint (&expr
, cstr
);
740 ppl_Linear_Expression_coefficient (expr
, iter
, coef
);
741 ppl_Coefficient_to_mpz_t (coef
, val
);
743 if (value_zero_p (val
))
745 ppl_delete_Linear_Expression (expr
);
749 for (i
= 0; i
< pbb_nb_scattering_transform (pbb
); i
++)
751 ppl_dimension_type scatter
= psct_scattering_dim (pbb
, i
);
753 ppl_Linear_Expression_coefficient (expr
, scatter
, coef
);
754 ppl_Coefficient_to_mpz_t (coef
, val
);
756 if (value_notzero_p (val
))
759 ppl_delete_Linear_Expression (expr
);
760 ppl_delete_Coefficient (coef
);
761 ppl_delete_Constraint_System_const_iterator (cit
);
762 ppl_delete_Constraint_System_const_iterator (cend
);
772 /* Returns the number of iterations NITER of the loop around PBB at
776 pbb_number_of_iterations (poly_bb_p pbb
,
777 graphite_dim_t loop_depth
,
780 ppl_Linear_Expression_t le
;
781 ppl_dimension_type dim
;
783 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PBB_DOMAIN (pbb
), &dim
);
784 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
785 ppl_set_coef (le
, pbb_iterator_dim (pbb
, loop_depth
), 1);
786 value_set_si (niter
, -1);
787 ppl_max_for_le_pointset (PBB_DOMAIN (pbb
), le
, niter
);
788 ppl_delete_Linear_Expression (le
);
791 /* Returns the number of iterations NITER of the loop around PBB at
792 time(scattering) dimension TIME_DEPTH. */
795 pbb_number_of_iterations_at_time (poly_bb_p pbb
,
796 graphite_dim_t time_depth
,
799 ppl_Pointset_Powerset_C_Polyhedron_t ext_domain
, sctr
;
800 ppl_Linear_Expression_t le
;
801 ppl_dimension_type dim
;
803 /* Takes together domain and scattering polyhedrons, and composes
804 them into the bigger polyhedron that has the following format:
806 t0..t_{n-1} | l0..l_{nlcl-1} | i0..i_{niter-1} | g0..g_{nparm-1}
809 | t0..t_{n-1} are time dimensions (scattering dimensions)
810 | l0..l_{nclc-1} are local variables in scattering function
811 | i0..i_{niter-1} are original iteration variables
812 | g0..g_{nparam-1} are global parameters. */
814 ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron (&sctr
,
815 PBB_TRANSFORMED_SCATTERING (pbb
));
817 /* Extend the iteration domain with the scattering dimensions:
818 0..0 | 0..0 | i0..i_{niter-1} | g0..g_{nparm-1}. */
819 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
820 (&ext_domain
, PBB_DOMAIN (pbb
));
821 ppl_insert_dimensions_pointset (ext_domain
, 0,
822 pbb_nb_scattering_transform (pbb
)
823 + pbb_nb_local_vars (pbb
));
825 /* Add to sctr the extended domain. */
826 ppl_Pointset_Powerset_C_Polyhedron_intersection_assign (sctr
, ext_domain
);
828 /* Extract the number of iterations. */
829 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (sctr
, &dim
);
830 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
831 ppl_set_coef (le
, time_depth
, 1);
832 value_set_si (niter
, -1);
833 ppl_max_for_le_pointset (sctr
, le
, niter
);
835 ppl_delete_Linear_Expression (le
);
836 ppl_delete_Pointset_Powerset_C_Polyhedron (sctr
);
837 ppl_delete_Pointset_Powerset_C_Polyhedron (ext_domain
);
840 /* Translates LOOP to LST. */
843 loop_to_lst (loop_p loop
, VEC (poly_bb_p
, heap
) *bbs
, int *i
)
846 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
848 for (; VEC_iterate (poly_bb_p
, bbs
, *i
, pbb
); (*i
)++)
851 basic_block bb
= GBB_BB (PBB_BLACK_BOX (pbb
));
853 if (bb
->loop_father
== loop
)
854 stmt
= new_lst_stmt (pbb
);
855 else if (flow_bb_inside_loop_p (loop
, bb
))
857 loop_p next
= loop
->inner
;
859 while (next
&& !flow_bb_inside_loop_p (next
, bb
))
862 stmt
= loop_to_lst (next
, bbs
, i
);
867 return new_lst_loop (seq
);
870 VEC_safe_push (lst_p
, heap
, seq
, stmt
);
873 return new_lst_loop (seq
);
876 /* Reads the original scattering of the SCOP and returns an LST
880 scop_to_lst (scop_p scop
)
883 int i
, n
= VEC_length (poly_bb_p
, SCOP_BBS (scop
));
884 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
885 sese region
= SCOP_REGION (scop
);
887 for (i
= 0; i
< n
; i
++)
889 poly_bb_p pbb
= VEC_index (poly_bb_p
, SCOP_BBS (scop
), i
);
890 loop_p loop
= outermost_loop_in_sese (region
, GBB_BB (PBB_BLACK_BOX (pbb
)));
892 if (loop_in_sese_p (loop
, region
))
893 res
= loop_to_lst (loop
, SCOP_BBS (scop
), &i
);
895 res
= new_lst_stmt (pbb
);
897 VEC_safe_push (lst_p
, heap
, seq
, res
);
900 res
= new_lst_loop (seq
);
901 SCOP_ORIGINAL_SCHEDULE (scop
) = res
;
902 SCOP_TRANSFORMED_SCHEDULE (scop
) = copy_lst (res
);
905 /* Print LST to FILE with INDENT spaces of indentation. */
908 print_lst (FILE *file
, lst_p lst
, int indent
)
913 indent_to (file
, indent
);
915 if (LST_LOOP_P (lst
))
920 if (LST_LOOP_FATHER (lst
))
921 fprintf (file
, "%d (loop", lst_dewey_number (lst
));
923 fprintf (file
, "(root");
925 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
926 print_lst (file
, l
, indent
+ 2);
931 fprintf (file
, "%d stmt_%d", lst_dewey_number (lst
), pbb_index (LST_PBB (lst
)));
934 /* Print LST to STDERR. */
937 debug_lst (lst_p lst
)
939 print_lst (stderr
, lst
, 0);
942 /* Pretty print to FILE the loop statement tree LST in DOT format. */
945 dot_lst_1 (FILE *file
, lst_p lst
)
950 if (LST_LOOP_P (lst
))
955 if (!LST_LOOP_FATHER (lst
))
956 fprintf (file
, "L -> L_%d_%d\n",
958 lst_dewey_number (lst
));
960 fprintf (file
, "L_%d_%d -> L_%d_%d\n",
961 lst_depth (LST_LOOP_FATHER (lst
)),
962 lst_dewey_number (LST_LOOP_FATHER (lst
)),
964 lst_dewey_number (lst
));
966 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
971 fprintf (file
, "L_%d_%d -> S_%d\n",
972 lst_depth (LST_LOOP_FATHER (lst
)),
973 lst_dewey_number (LST_LOOP_FATHER (lst
)),
974 pbb_index (LST_PBB (lst
)));
978 /* Display the LST using dotty. */
983 /* When debugging, enable the following code. This cannot be used
984 in production compilers because it calls "system". */
987 FILE *stream
= fopen ("/tmp/lst.dot", "w");
990 fputs ("digraph all {\n", stream
);
991 dot_lst_1 (stream
, lst
);
992 fputs ("}\n\n", stream
);
995 x
= system ("dotty /tmp/lst.dot");
997 fputs ("digraph all {\n", stderr
);
998 dot_lst_1 (stderr
, lst
);
999 fputs ("}\n\n", stderr
);