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 if (PBB_TRANSFORMED_SCATTERING (pbb
)
149 || PBB_ORIGINAL_SCATTERING (pbb
))
150 fprintf (file
, "# Scattering function is provided\n1\n");
153 fprintf (file
, "# Scattering function is not provided\n0\n");
157 fprintf (file
, "# scattering bb_%d (\n", pbb_index (pbb
));
158 fprintf (file
, "# eq");
160 for (i
= 0; i
< pbb_nb_scattering_transform (pbb
); i
++)
161 fprintf (file
, " s%d", (int) i
);
163 for (i
= 0; i
< pbb_nb_local_vars (pbb
); i
++)
164 fprintf (file
, " lv%d", (int) i
);
166 for (i
= 0; i
< pbb_dim_iter_domain (pbb
); i
++)
167 fprintf (file
, " i%d", (int) i
);
169 for (i
= 0; i
< pbb_nb_params (pbb
); i
++)
170 fprintf (file
, " p%d", (int) i
);
172 fprintf (file
, " cst\n");
174 /* Number of disjunct components. Remove this when
175 PBB_TRANSFORMED_SCATTERING will be a pointset_powerset. */
176 fprintf (file
, "1\n");
177 ppl_print_polyhedron_matrix (file
, PBB_TRANSFORMED_SCATTERING (pbb
)
178 ? PBB_TRANSFORMED_SCATTERING (pbb
)
179 : PBB_ORIGINAL_SCATTERING (pbb
));
181 fprintf (file
, "#)\n");
184 /* Prints to FILE the iteration domain of PBB. */
187 print_iteration_domain (FILE *file
, poly_bb_p pbb
)
189 print_pbb_domain (file
, pbb
);
192 /* Prints to FILE the scattering functions of every PBB of SCOP. */
195 print_scattering_functions (FILE *file
, scop_p scop
)
200 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
201 print_scattering_function (file
, pbb
);
204 /* Prints to FILE the iteration domains of every PBB of SCOP. */
207 print_iteration_domains (FILE *file
, scop_p scop
)
212 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
213 print_iteration_domain (file
, pbb
);
216 /* Prints to STDERR the scattering function of PBB. */
219 debug_scattering_function (poly_bb_p pbb
)
221 print_scattering_function (stderr
, pbb
);
224 /* Prints to STDERR the iteration domain of PBB. */
227 debug_iteration_domain (poly_bb_p pbb
)
229 print_iteration_domain (stderr
, pbb
);
232 /* Prints to STDERR the scattering functions of every PBB of SCOP. */
235 debug_scattering_functions (scop_p scop
)
237 print_scattering_functions (stderr
, scop
);
240 /* Prints to STDERR the iteration domains of every PBB of SCOP. */
243 debug_iteration_domains (scop_p scop
)
245 print_iteration_domains (stderr
, scop
);
248 /* Apply graphite transformations to all the basic blocks of SCOP. */
251 apply_poly_transforms (scop_p scop
)
253 bool transform_done
= false;
255 /* Generate code even if we did not apply any real transformation.
256 This also allows to check the performance for the identity
257 transformation: GIMPLE -> GRAPHITE -> GIMPLE
258 Keep in mind that CLooG optimizes in control, so the loop structure
259 may change, even if we only use -fgraphite-identity. */
260 if (flag_graphite_identity
)
261 transform_done
= true;
263 if (flag_loop_parallelize_all
)
264 transform_done
= true;
267 transform_done
|= scop_do_block (scop
);
270 if (flag_loop_strip_mine
)
271 transform_done
|= scop_do_strip_mine (scop
);
273 if (flag_loop_interchange
)
274 transform_done
|= scop_do_interchange (scop
);
277 return transform_done
;
280 /* Returns true when it PDR1 is a duplicate of PDR2: same PBB, and
281 their ACCESSES, TYPE, and NB_SUBSCRIPTS are the same. */
284 can_collapse_pdrs (poly_dr_p pdr1
, poly_dr_p pdr2
)
287 ppl_Pointset_Powerset_C_Polyhedron_t af1
, af2
, diff
;
289 if (PDR_PBB (pdr1
) != PDR_PBB (pdr2
)
290 || PDR_NB_SUBSCRIPTS (pdr1
) != PDR_NB_SUBSCRIPTS (pdr2
)
291 || PDR_TYPE (pdr1
) != PDR_TYPE (pdr2
))
294 af1
= PDR_ACCESSES (pdr1
);
295 af2
= PDR_ACCESSES (pdr2
);
296 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
298 ppl_Pointset_Powerset_C_Polyhedron_difference_assign (diff
, af2
);
300 res
= ppl_Pointset_Powerset_C_Polyhedron_is_empty (diff
);
301 ppl_delete_Pointset_Powerset_C_Polyhedron (diff
);
305 /* Removes duplicated data references in PBB. */
308 pbb_remove_duplicate_pdrs (poly_bb_p pbb
)
311 poly_dr_p pdr1
, pdr2
;
312 unsigned n
= VEC_length (poly_dr_p
, PBB_DRS (pbb
));
313 VEC (poly_dr_p
, heap
) *collapsed
= VEC_alloc (poly_dr_p
, heap
, n
);
315 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr1
); i
++)
316 for (j
= 0; VEC_iterate (poly_dr_p
, collapsed
, j
, pdr2
); j
++)
317 if (!can_collapse_pdrs (pdr1
, pdr2
))
318 VEC_quick_push (poly_dr_p
, collapsed
, pdr1
);
320 VEC_free (poly_dr_p
, heap
, collapsed
);
321 PBB_PDR_DUPLICATES_REMOVED (pbb
) = true;
324 /* Create a new polyhedral data reference and add it to PBB. It is
325 defined by its ACCESSES, its TYPE, and the number of subscripts
329 new_poly_dr (poly_bb_p pbb
, int dr_base_object_set
,
330 ppl_Pointset_Powerset_C_Polyhedron_t accesses
,
331 enum poly_dr_type type
, void *cdr
, graphite_dim_t nb_subscripts
)
334 poly_dr_p pdr
= XNEW (struct poly_dr
);
337 PDR_BASE_OBJECT_SET (pdr
) = dr_base_object_set
;
338 PDR_NB_REFS (pdr
) = 1;
340 PDR_ACCESSES (pdr
) = accesses
;
341 PDR_TYPE (pdr
) = type
;
343 PDR_NB_SUBSCRIPTS (pdr
) = nb_subscripts
;
344 VEC_safe_push (poly_dr_p
, heap
, PBB_DRS (pbb
), pdr
);
347 /* Free polyhedral data reference PDR. */
350 free_poly_dr (poly_dr_p pdr
)
352 ppl_delete_Pointset_Powerset_C_Polyhedron (PDR_ACCESSES (pdr
));
356 /* Create a new polyhedral black box. */
359 new_poly_bb (scop_p scop
, void *black_box
, bool reduction
)
361 poly_bb_p pbb
= XNEW (struct poly_bb
);
363 PBB_DOMAIN (pbb
) = NULL
;
364 PBB_SCOP (pbb
) = scop
;
365 pbb_set_black_box (pbb
, black_box
);
366 PBB_TRANSFORMED (pbb
) = NULL
;
367 PBB_SAVED (pbb
) = NULL
;
368 PBB_ORIGINAL (pbb
) = NULL
;
369 PBB_DRS (pbb
) = VEC_alloc (poly_dr_p
, heap
, 3);
370 PBB_IS_REDUCTION (pbb
) = reduction
;
371 PBB_PDR_DUPLICATES_REMOVED (pbb
) = false;
372 VEC_safe_push (poly_bb_p
, heap
, SCOP_BBS (scop
), pbb
);
375 /* Free polyhedral black box. */
378 free_poly_bb (poly_bb_p pbb
)
383 ppl_delete_Pointset_Powerset_C_Polyhedron (PBB_DOMAIN (pbb
));
385 if (PBB_TRANSFORMED (pbb
))
386 poly_scattering_free (PBB_TRANSFORMED (pbb
));
389 poly_scattering_free (PBB_SAVED (pbb
));
391 if (PBB_ORIGINAL (pbb
))
392 poly_scattering_free (PBB_ORIGINAL (pbb
));
395 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
398 VEC_free (poly_dr_p
, heap
, PBB_DRS (pbb
));
403 print_pdr_access_layout (FILE *file
, poly_dr_p pdr
)
407 fprintf (file
, "# eq");
409 for (i
= 0; i
< pdr_dim_iter_domain (pdr
); i
++)
410 fprintf (file
, " i%d", (int) i
);
412 for (i
= 0; i
< pdr_nb_params (pdr
); i
++)
413 fprintf (file
, " p%d", (int) i
);
415 fprintf (file
, " alias");
417 for (i
= 0; i
< PDR_NB_SUBSCRIPTS (pdr
); i
++)
418 fprintf (file
, " sub%d", (int) i
);
420 fprintf (file
, " cst\n");
423 /* Prints to FILE the polyhedral data reference PDR. */
426 print_pdr (FILE *file
, poly_dr_p pdr
)
428 fprintf (file
, "# pdr_%d (", PDR_ID (pdr
));
430 switch (PDR_TYPE (pdr
))
433 fprintf (file
, "read \n");
437 fprintf (file
, "write \n");
441 fprintf (file
, "may_write \n");
448 dump_data_reference (file
, (data_reference_p
) PDR_CDR (pdr
));
450 fprintf (file
, "# data accesses (\n");
451 print_pdr_access_layout (file
, pdr
);
452 ppl_print_powerset_matrix (file
, PDR_ACCESSES (pdr
));
453 fprintf (file
, "#)\n");
455 fprintf (file
, "#)\n");
458 /* Prints to STDERR the polyhedral data reference PDR. */
461 debug_pdr (poly_dr_p pdr
)
463 print_pdr (stderr
, pdr
);
466 /* Creates a new SCOP containing REGION. */
469 new_scop (void *region
)
471 scop_p scop
= XNEW (struct scop
);
473 SCOP_CONTEXT (scop
) = NULL
;
474 scop_set_region (scop
, region
);
475 SCOP_BBS (scop
) = VEC_alloc (poly_bb_p
, heap
, 3);
476 SCOP_ORIGINAL_PDDRS (scop
) = htab_create (10, hash_poly_ddr_p
,
477 eq_poly_ddr_p
, free_poly_ddr
);
478 SCOP_ORIGINAL_SCHEDULE (scop
) = NULL
;
479 SCOP_TRANSFORMED_SCHEDULE (scop
) = NULL
;
480 SCOP_SAVED_SCHEDULE (scop
) = NULL
;
481 POLY_SCOP_P (scop
) = false;
489 free_scop (scop_p scop
)
494 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
497 VEC_free (poly_bb_p
, heap
, SCOP_BBS (scop
));
499 if (SCOP_CONTEXT (scop
))
500 ppl_delete_Pointset_Powerset_C_Polyhedron (SCOP_CONTEXT (scop
));
502 htab_delete (SCOP_ORIGINAL_PDDRS (scop
));
503 free_lst (SCOP_ORIGINAL_SCHEDULE (scop
));
504 free_lst (SCOP_TRANSFORMED_SCHEDULE (scop
));
505 free_lst (SCOP_SAVED_SCHEDULE (scop
));
509 /* Print to FILE the domain of PBB. */
512 print_pbb_domain (FILE *file
, poly_bb_p pbb
)
515 gimple_bb_p gbb
= PBB_BLACK_BOX (pbb
);
517 if (!PBB_DOMAIN (pbb
))
520 fprintf (file
, "# Iteration domain of bb_%d (\n", GBB_BB (gbb
)->index
);
521 fprintf (file
, "# eq");
523 for (i
= 0; i
< pbb_dim_iter_domain (pbb
); i
++)
524 fprintf (file
, " i%d", (int) i
);
526 for (i
= 0; i
< pbb_nb_params (pbb
); i
++)
527 fprintf (file
, " p%d", (int) i
);
529 fprintf (file
, " cst\n");
531 if (PBB_DOMAIN (pbb
))
532 ppl_print_powerset_matrix (file
, PBB_DOMAIN (pbb
));
534 fprintf (file
, "0\n");
536 fprintf (file
, "#)\n");
539 /* Dump the cases of a graphite basic block GBB on FILE. */
542 dump_gbb_cases (FILE *file
, gimple_bb_p gbb
)
546 VEC (gimple
, heap
) *cases
;
551 cases
= GBB_CONDITION_CASES (gbb
);
552 if (VEC_empty (gimple
, cases
))
555 fprintf (file
, "# cases bb_%d (\n", GBB_BB (gbb
)->index
);
557 for (i
= 0; VEC_iterate (gimple
, cases
, i
, stmt
); i
++)
559 fprintf (file
, "# ");
560 print_gimple_stmt (file
, stmt
, 0, 0);
563 fprintf (file
, "#)\n");
566 /* Dump conditions of a graphite basic block GBB on FILE. */
569 dump_gbb_conditions (FILE *file
, gimple_bb_p gbb
)
573 VEC (gimple
, heap
) *conditions
;
578 conditions
= GBB_CONDITIONS (gbb
);
579 if (VEC_empty (gimple
, conditions
))
582 fprintf (file
, "# conditions bb_%d (\n", GBB_BB (gbb
)->index
);
584 for (i
= 0; VEC_iterate (gimple
, conditions
, i
, stmt
); i
++)
586 fprintf (file
, "# ");
587 print_gimple_stmt (file
, stmt
, 0, 0);
590 fprintf (file
, "#)\n");
593 /* Print to FILE all the data references of PBB. */
596 print_pdrs (FILE *file
, poly_bb_p pbb
)
603 if (VEC_length (poly_dr_p
, PBB_DRS (pbb
)) == 0)
605 fprintf (file
, "# Access informations are not provided\n0\n");
609 fprintf (file
, "# Data references (\n");
610 fprintf (file
, "# Access informations are provided\n1\n");
612 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
613 if (PDR_TYPE (pdr
) == PDR_READ
)
618 fprintf (file
, "# Read data references (\n");
619 fprintf (file
, "# Read access informations\n%d\n", nb_reads
);
620 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
621 if (PDR_TYPE (pdr
) == PDR_READ
)
622 print_pdr (file
, pdr
);
623 fprintf (file
, "#)\n");
625 fprintf (file
, "# Write data references (\n");
626 fprintf (file
, "# Write access informations\n%d\n", nb_writes
);
627 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
628 if (PDR_TYPE (pdr
) != PDR_READ
)
629 print_pdr (file
, pdr
);
630 fprintf (file
, "#)\n");
631 fprintf (file
, "#)\n");
634 /* Print to STDERR all the data references of PBB. */
637 debug_pdrs (poly_bb_p pbb
)
639 print_pdrs (stderr
, pbb
);
642 /* Print to FILE the body of PBB. */
645 print_pbb_body (FILE *file
, poly_bb_p pbb
)
647 fprintf (file
, "# Body (\n");
648 fprintf (file
, "# Statement body is provided\n1\n");
649 fprintf (file
, "# Original iterator names\n# Iterator names are not provided yet.\n");
650 fprintf (file
, "# Statement body\n");
651 fprintf (file
, "{\n");
652 dump_bb (pbb_bb (pbb
), file
, 0);
653 fprintf (file
, "}\n");
654 fprintf (file
, "#)\n");
657 /* Print to FILE the domain and scattering function of PBB. */
660 print_pbb (FILE *file
, poly_bb_p pbb
)
662 fprintf (file
, "# pbb_%d (\n", pbb_index (pbb
));
663 dump_gbb_conditions (file
, PBB_BLACK_BOX (pbb
));
664 dump_gbb_cases (file
, PBB_BLACK_BOX (pbb
));
665 print_pbb_domain (file
, pbb
);
666 print_scattering_function (file
, pbb
);
667 print_pdrs (file
, pbb
);
668 print_pbb_body (file
, pbb
);
669 fprintf (file
, "#)\n");
672 /* Print to FILE the parameters of SCOP. */
675 print_scop_params (FILE *file
, scop_p scop
)
680 fprintf (file
, "# parameters (\n");
682 if (VEC_length (tree
, SESE_PARAMS (SCOP_REGION (scop
))))
683 fprintf (file
, "# Parameter names are provided\n1\n# Parameter names \n");
685 fprintf (file
, "# Parameter names are not provided\n0\n");
687 for (i
= 0; VEC_iterate (tree
, SESE_PARAMS (SCOP_REGION (scop
)), i
, t
); i
++)
689 print_generic_expr (file
, t
, 0);
690 fprintf (file
, " # p_%d \n", i
);
692 fprintf (file
, "#)\n");
695 /* Print to FILE the context of SCoP. */
697 print_scop_context (FILE *file
, scop_p scop
)
701 fprintf (file
, "# Context (\n");
702 fprintf (file
, "# eq");
704 for (i
= 0; i
< scop_nb_params (scop
); i
++)
705 fprintf (file
, " p%d", (int) i
);
707 fprintf (file
, " cst\n");
709 if (SCOP_CONTEXT (scop
))
710 ppl_print_powerset_matrix (file
, SCOP_CONTEXT (scop
));
712 fprintf (file
, "0 %d\n", (int) scop_nb_params (scop
) + 2);
714 fprintf (file
, "# )\n");
717 /* Print to FILE the SCOP. */
720 print_scop (FILE *file
, scop_p scop
)
725 fprintf (file
, "SCoP #(\n");
726 fprintf (file
, "# Language\nGimple\n");
727 print_scop_context (file
, scop
);
728 print_scop_params (file
, scop
);
729 fprintf (file
, "# Number of statements\n%d\n",
730 VEC_length (poly_bb_p
, SCOP_BBS (scop
)));
732 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
733 print_pbb (file
, pbb
);
735 fprintf (file
, "# original_lst (\n");
736 print_lst (file
, SCOP_ORIGINAL_SCHEDULE (scop
), 0);
737 fprintf (file
, "\n#)\n");
739 fprintf (file
, "# transformed_lst (\n");
740 print_lst (file
, SCOP_TRANSFORMED_SCHEDULE (scop
), 0);
741 fprintf (file
, "\n#)\n");
743 fprintf (file
, "#)\n");
746 /* Print to STDERR the domain of PBB. */
749 debug_pbb_domain (poly_bb_p pbb
)
751 print_pbb_domain (stderr
, pbb
);
754 /* Print to FILE the domain and scattering function of PBB. */
757 debug_pbb (poly_bb_p pbb
)
759 print_pbb (stderr
, pbb
);
762 /* Print to STDERR the context of SCOP. */
765 debug_scop_context (scop_p scop
)
767 print_scop_context (stderr
, scop
);
770 /* Print to STDERR the SCOP. */
773 debug_scop (scop_p scop
)
775 print_scop (stderr
, scop
);
778 /* Print to STDERR the parameters of SCOP. */
781 debug_scop_params (scop_p scop
)
783 print_scop_params (stderr
, scop
);
787 /* The dimension in the transformed scattering polyhedron of PBB
788 containing the scattering iterator for the loop at depth LOOP_DEPTH. */
791 psct_scattering_dim_for_loop_depth (poly_bb_p pbb
, graphite_dim_t loop_depth
)
793 ppl_const_Constraint_System_t pcs
;
794 ppl_Constraint_System_const_iterator_t cit
, cend
;
795 ppl_const_Constraint_t cstr
;
796 ppl_Polyhedron_t ph
= PBB_TRANSFORMED_SCATTERING (pbb
);
797 ppl_dimension_type iter
= psct_iterator_dim (pbb
, loop_depth
);
798 ppl_Linear_Expression_t expr
;
799 ppl_Coefficient_t coef
;
804 ppl_new_Coefficient (&coef
);
805 ppl_Polyhedron_get_constraints (ph
, &pcs
);
806 ppl_new_Constraint_System_const_iterator (&cit
);
807 ppl_new_Constraint_System_const_iterator (&cend
);
809 for (ppl_Constraint_System_begin (pcs
, cit
),
810 ppl_Constraint_System_end (pcs
, cend
);
811 !ppl_Constraint_System_const_iterator_equal_test (cit
, cend
);
812 ppl_Constraint_System_const_iterator_increment (cit
))
814 ppl_Constraint_System_const_iterator_dereference (cit
, &cstr
);
815 ppl_new_Linear_Expression_from_Constraint (&expr
, cstr
);
816 ppl_Linear_Expression_coefficient (expr
, iter
, coef
);
817 ppl_Coefficient_to_mpz_t (coef
, val
);
819 if (value_zero_p (val
))
821 ppl_delete_Linear_Expression (expr
);
825 for (i
= 0; i
< pbb_nb_scattering_transform (pbb
); i
++)
827 ppl_dimension_type scatter
= psct_scattering_dim (pbb
, i
);
829 ppl_Linear_Expression_coefficient (expr
, scatter
, coef
);
830 ppl_Coefficient_to_mpz_t (coef
, val
);
832 if (value_notzero_p (val
))
835 ppl_delete_Linear_Expression (expr
);
836 ppl_delete_Coefficient (coef
);
837 ppl_delete_Constraint_System_const_iterator (cit
);
838 ppl_delete_Constraint_System_const_iterator (cend
);
848 /* Returns the number of iterations NITER of the loop around PBB at
852 pbb_number_of_iterations (poly_bb_p pbb
,
853 graphite_dim_t loop_depth
,
856 ppl_Linear_Expression_t le
;
857 ppl_dimension_type dim
;
859 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PBB_DOMAIN (pbb
), &dim
);
860 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
861 ppl_set_coef (le
, pbb_iterator_dim (pbb
, loop_depth
), 1);
862 value_set_si (niter
, -1);
863 ppl_max_for_le_pointset (PBB_DOMAIN (pbb
), le
, niter
);
864 ppl_delete_Linear_Expression (le
);
867 /* Returns the number of iterations NITER of the loop around PBB at
868 time(scattering) dimension TIME_DEPTH. */
871 pbb_number_of_iterations_at_time (poly_bb_p pbb
,
872 graphite_dim_t time_depth
,
875 ppl_Pointset_Powerset_C_Polyhedron_t ext_domain
, sctr
;
876 ppl_Linear_Expression_t le
;
877 ppl_dimension_type dim
;
879 /* Takes together domain and scattering polyhedrons, and composes
880 them into the bigger polyhedron that has the following format:
882 t0..t_{n-1} | l0..l_{nlcl-1} | i0..i_{niter-1} | g0..g_{nparm-1}
885 | t0..t_{n-1} are time dimensions (scattering dimensions)
886 | l0..l_{nclc-1} are local variables in scattering function
887 | i0..i_{niter-1} are original iteration variables
888 | g0..g_{nparam-1} are global parameters. */
890 ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron (&sctr
,
891 PBB_TRANSFORMED_SCATTERING (pbb
));
893 /* Extend the iteration domain with the scattering dimensions:
894 0..0 | 0..0 | i0..i_{niter-1} | g0..g_{nparm-1}. */
895 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
896 (&ext_domain
, PBB_DOMAIN (pbb
));
897 ppl_insert_dimensions_pointset (ext_domain
, 0,
898 pbb_nb_scattering_transform (pbb
)
899 + pbb_nb_local_vars (pbb
));
901 /* Add to sctr the extended domain. */
902 ppl_Pointset_Powerset_C_Polyhedron_intersection_assign (sctr
, ext_domain
);
904 /* Extract the number of iterations. */
905 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (sctr
, &dim
);
906 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
907 ppl_set_coef (le
, time_depth
, 1);
908 value_set_si (niter
, -1);
909 ppl_max_for_le_pointset (sctr
, le
, niter
);
911 ppl_delete_Linear_Expression (le
);
912 ppl_delete_Pointset_Powerset_C_Polyhedron (sctr
);
913 ppl_delete_Pointset_Powerset_C_Polyhedron (ext_domain
);
916 /* Translates LOOP to LST. */
919 loop_to_lst (loop_p loop
, VEC (poly_bb_p
, heap
) *bbs
, int *i
)
922 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
924 for (; VEC_iterate (poly_bb_p
, bbs
, *i
, pbb
); (*i
)++)
927 basic_block bb
= GBB_BB (PBB_BLACK_BOX (pbb
));
929 if (bb
->loop_father
== loop
)
930 stmt
= new_lst_stmt (pbb
);
931 else if (flow_bb_inside_loop_p (loop
, bb
))
933 loop_p next
= loop
->inner
;
935 while (next
&& !flow_bb_inside_loop_p (next
, bb
))
938 stmt
= loop_to_lst (next
, bbs
, i
);
943 return new_lst_loop (seq
);
946 VEC_safe_push (lst_p
, heap
, seq
, stmt
);
949 return new_lst_loop (seq
);
952 /* Reads the original scattering of the SCOP and returns an LST
956 scop_to_lst (scop_p scop
)
959 int i
, n
= VEC_length (poly_bb_p
, SCOP_BBS (scop
));
960 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
961 sese region
= SCOP_REGION (scop
);
963 for (i
= 0; i
< n
; i
++)
965 poly_bb_p pbb
= VEC_index (poly_bb_p
, SCOP_BBS (scop
), i
);
966 loop_p loop
= outermost_loop_in_sese (region
, GBB_BB (PBB_BLACK_BOX (pbb
)));
968 if (loop_in_sese_p (loop
, region
))
969 res
= loop_to_lst (loop
, SCOP_BBS (scop
), &i
);
971 res
= new_lst_stmt (pbb
);
973 VEC_safe_push (lst_p
, heap
, seq
, res
);
976 res
= new_lst_loop (seq
);
977 SCOP_ORIGINAL_SCHEDULE (scop
) = res
;
978 SCOP_TRANSFORMED_SCHEDULE (scop
) = copy_lst (res
);
981 /* Print to FILE on a new line COLUMN white spaces. */
984 lst_indent_to (FILE *file
, int column
)
989 fprintf (file
, "\n#");
991 for (i
= 0; i
< column
; i
++)
995 /* Print LST to FILE with INDENT spaces of indentation. */
998 print_lst (FILE *file
, lst_p lst
, int indent
)
1003 lst_indent_to (file
, indent
);
1005 if (LST_LOOP_P (lst
))
1010 if (LST_LOOP_FATHER (lst
))
1011 fprintf (file
, "%d (loop", lst_dewey_number (lst
));
1013 fprintf (file
, "#(root");
1015 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
1016 print_lst (file
, l
, indent
+ 2);
1018 fprintf (file
, ")");
1021 fprintf (file
, "%d stmt_%d", lst_dewey_number (lst
), pbb_index (LST_PBB (lst
)));
1024 /* Print LST to STDERR. */
1027 debug_lst (lst_p lst
)
1029 print_lst (stderr
, lst
, 0);
1032 /* Pretty print to FILE the loop statement tree LST in DOT format. */
1035 dot_lst_1 (FILE *file
, lst_p lst
)
1040 if (LST_LOOP_P (lst
))
1045 if (!LST_LOOP_FATHER (lst
))
1046 fprintf (file
, "L -> L_%d_%d\n",
1048 lst_dewey_number (lst
));
1050 fprintf (file
, "L_%d_%d -> L_%d_%d\n",
1051 lst_depth (LST_LOOP_FATHER (lst
)),
1052 lst_dewey_number (LST_LOOP_FATHER (lst
)),
1054 lst_dewey_number (lst
));
1056 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
1057 dot_lst_1 (file
, l
);
1061 fprintf (file
, "L_%d_%d -> S_%d\n",
1062 lst_depth (LST_LOOP_FATHER (lst
)),
1063 lst_dewey_number (LST_LOOP_FATHER (lst
)),
1064 pbb_index (LST_PBB (lst
)));
1068 /* Display the LST using dotty. */
1073 /* When debugging, enable the following code. This cannot be used
1074 in production compilers because it calls "system". */
1077 FILE *stream
= fopen ("/tmp/lst.dot", "w");
1078 gcc_assert (stream
);
1080 fputs ("digraph all {\n", stream
);
1081 dot_lst_1 (stream
, lst
);
1082 fputs ("}\n\n", stream
);
1085 x
= system ("dotty /tmp/lst.dot");
1087 fputs ("digraph all {\n", stderr
);
1088 dot_lst_1 (stderr
, lst
);
1089 fputs ("}\n\n", stderr
);