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);