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;
253 transform_done
|= scop_do_block (scop
);
256 if (flag_loop_strip_mine
)
257 transform_done
|= scop_do_strip_mine (scop
);
259 if (flag_loop_interchange
)
260 transform_done
|= scop_do_interchange (scop
);
263 return transform_done
;
266 /* Returns true when it PDR1 is a duplicate of PDR2: same PBB, and
267 their ACCESSES, TYPE, and NB_SUBSCRIPTS are the same. */
270 can_collapse_pdrs (poly_dr_p pdr1
, poly_dr_p pdr2
)
273 ppl_Pointset_Powerset_C_Polyhedron_t af1
, af2
, diff
;
275 if (PDR_PBB (pdr1
) != PDR_PBB (pdr2
)
276 || PDR_NB_SUBSCRIPTS (pdr1
) != PDR_NB_SUBSCRIPTS (pdr2
)
277 || PDR_TYPE (pdr1
) != PDR_TYPE (pdr2
))
280 af1
= PDR_ACCESSES (pdr1
);
281 af2
= PDR_ACCESSES (pdr2
);
282 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
284 ppl_Pointset_Powerset_C_Polyhedron_difference_assign (diff
, af2
);
286 res
= ppl_Pointset_Powerset_C_Polyhedron_is_empty (diff
);
287 ppl_delete_Pointset_Powerset_C_Polyhedron (diff
);
291 /* Removes duplicated data references in PBB. */
294 pbb_remove_duplicate_pdrs (poly_bb_p pbb
)
297 poly_dr_p pdr1
, pdr2
;
298 unsigned n
= VEC_length (poly_dr_p
, PBB_DRS (pbb
));
299 VEC (poly_dr_p
, heap
) *collapsed
= VEC_alloc (poly_dr_p
, heap
, n
);
301 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr1
); i
++)
302 for (j
= 0; VEC_iterate (poly_dr_p
, collapsed
, j
, pdr2
); j
++)
303 if (!can_collapse_pdrs (pdr1
, pdr2
))
304 VEC_quick_push (poly_dr_p
, collapsed
, pdr1
);
306 VEC_free (poly_dr_p
, heap
, collapsed
);
307 PBB_PDR_DUPLICATES_REMOVED (pbb
) = true;
310 /* Create a new polyhedral data reference and add it to PBB. It is
311 defined by its ACCESSES, its TYPE, and the number of subscripts
315 new_poly_dr (poly_bb_p pbb
, int dr_base_object_set
,
316 ppl_Pointset_Powerset_C_Polyhedron_t accesses
,
317 enum poly_dr_type type
, void *cdr
, graphite_dim_t nb_subscripts
)
320 poly_dr_p pdr
= XNEW (struct poly_dr
);
323 PDR_BASE_OBJECT_SET (pdr
) = dr_base_object_set
;
324 PDR_NB_REFS (pdr
) = 1;
326 PDR_ACCESSES (pdr
) = accesses
;
327 PDR_TYPE (pdr
) = type
;
329 PDR_NB_SUBSCRIPTS (pdr
) = nb_subscripts
;
330 VEC_safe_push (poly_dr_p
, heap
, PBB_DRS (pbb
), pdr
);
333 /* Free polyhedral data reference PDR. */
336 free_poly_dr (poly_dr_p pdr
)
338 ppl_delete_Pointset_Powerset_C_Polyhedron (PDR_ACCESSES (pdr
));
342 /* Create a new polyhedral black box. */
345 new_poly_bb (scop_p scop
, void *black_box
, bool reduction
)
347 poly_bb_p pbb
= XNEW (struct poly_bb
);
349 PBB_DOMAIN (pbb
) = NULL
;
350 PBB_SCOP (pbb
) = scop
;
351 pbb_set_black_box (pbb
, black_box
);
352 PBB_TRANSFORMED (pbb
) = NULL
;
353 PBB_SAVED (pbb
) = NULL
;
354 PBB_ORIGINAL (pbb
) = NULL
;
355 PBB_DRS (pbb
) = VEC_alloc (poly_dr_p
, heap
, 3);
356 PBB_IS_REDUCTION (pbb
) = reduction
;
357 PBB_PDR_DUPLICATES_REMOVED (pbb
) = false;
358 VEC_safe_push (poly_bb_p
, heap
, SCOP_BBS (scop
), pbb
);
361 /* Free polyhedral black box. */
364 free_poly_bb (poly_bb_p pbb
)
369 ppl_delete_Pointset_Powerset_C_Polyhedron (PBB_DOMAIN (pbb
));
371 if (PBB_TRANSFORMED (pbb
))
372 poly_scattering_free (PBB_TRANSFORMED (pbb
));
375 poly_scattering_free (PBB_SAVED (pbb
));
377 if (PBB_ORIGINAL (pbb
))
378 poly_scattering_free (PBB_ORIGINAL (pbb
));
381 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
384 VEC_free (poly_dr_p
, heap
, PBB_DRS (pbb
));
389 print_pdr_access_layout (FILE *file
, poly_dr_p pdr
)
393 fprintf (file
, "# eq");
395 for (i
= 0; i
< pdr_dim_iter_domain (pdr
); i
++)
396 fprintf (file
, " i%d", (int) i
);
398 for (i
= 0; i
< pdr_nb_params (pdr
); i
++)
399 fprintf (file
, " p%d", (int) i
);
401 fprintf (file
, " alias");
403 for (i
= 0; i
< PDR_NB_SUBSCRIPTS (pdr
); i
++)
404 fprintf (file
, " sub%d", (int) i
);
406 fprintf (file
, " cst\n");
409 /* Prints to FILE the polyhedral data reference PDR. */
412 print_pdr (FILE *file
, poly_dr_p pdr
)
414 fprintf (file
, "pdr_%d (", PDR_ID (pdr
));
416 switch (PDR_TYPE (pdr
))
419 fprintf (file
, "read \n");
423 fprintf (file
, "write \n");
427 fprintf (file
, "may_write \n");
434 dump_data_reference (file
, (data_reference_p
) PDR_CDR (pdr
));
436 fprintf (file
, "data accesses (\n");
437 print_pdr_access_layout (file
, pdr
);
438 ppl_print_powerset_matrix (file
, PDR_ACCESSES (pdr
));
439 fprintf (file
, ")\n");
441 fprintf (file
, ")\n");
444 /* Prints to STDERR the polyhedral data reference PDR. */
447 debug_pdr (poly_dr_p pdr
)
449 print_pdr (stderr
, pdr
);
452 /* Creates a new SCOP containing REGION. */
455 new_scop (void *region
)
457 scop_p scop
= XNEW (struct scop
);
459 SCOP_CONTEXT (scop
) = NULL
;
460 scop_set_region (scop
, region
);
461 SCOP_BBS (scop
) = VEC_alloc (poly_bb_p
, heap
, 3);
462 SCOP_ORIGINAL_PDDRS (scop
) = htab_create (10, hash_poly_ddr_p
,
463 eq_poly_ddr_p
, free_poly_ddr
);
464 SCOP_ORIGINAL_SCHEDULE (scop
) = NULL
;
465 SCOP_TRANSFORMED_SCHEDULE (scop
) = NULL
;
466 SCOP_SAVED_SCHEDULE (scop
) = NULL
;
473 free_scop (scop_p scop
)
478 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
481 VEC_free (poly_bb_p
, heap
, SCOP_BBS (scop
));
483 if (SCOP_CONTEXT (scop
))
484 ppl_delete_Pointset_Powerset_C_Polyhedron (SCOP_CONTEXT (scop
));
486 htab_delete (SCOP_ORIGINAL_PDDRS (scop
));
487 free_lst (SCOP_ORIGINAL_SCHEDULE (scop
));
488 free_lst (SCOP_TRANSFORMED_SCHEDULE (scop
));
489 free_lst (SCOP_SAVED_SCHEDULE (scop
));
493 /* Print to FILE the domain of PBB. */
496 print_pbb_domain (FILE *file
, poly_bb_p pbb
)
499 gimple_bb_p gbb
= PBB_BLACK_BOX (pbb
);
501 if (!PBB_DOMAIN (pbb
))
504 fprintf (file
, "domains bb_%d (\n", GBB_BB (gbb
)->index
);
505 fprintf (file
, "# eq");
507 for (i
= 0; i
< pbb_dim_iter_domain (pbb
); i
++)
508 fprintf (file
, " i%d", (int) i
);
510 for (i
= 0; i
< pbb_nb_params (pbb
); i
++)
511 fprintf (file
, " p%d", (int) i
);
513 fprintf (file
, " cst\n");
515 if (PBB_DOMAIN (pbb
))
516 ppl_print_powerset_matrix (file
, PBB_DOMAIN (pbb
));
518 fprintf (file
, ")\n");
521 /* Dump the cases of a graphite basic block GBB on FILE. */
524 dump_gbb_cases (FILE *file
, gimple_bb_p gbb
)
528 VEC (gimple
, heap
) *cases
;
533 cases
= GBB_CONDITION_CASES (gbb
);
534 if (VEC_empty (gimple
, cases
))
537 fprintf (file
, "cases bb_%d (", GBB_BB (gbb
)->index
);
539 for (i
= 0; VEC_iterate (gimple
, cases
, i
, stmt
); i
++)
540 print_gimple_stmt (file
, stmt
, 0, 0);
542 fprintf (file
, ")\n");
545 /* Dump conditions of a graphite basic block GBB on FILE. */
548 dump_gbb_conditions (FILE *file
, gimple_bb_p gbb
)
552 VEC (gimple
, heap
) *conditions
;
557 conditions
= GBB_CONDITIONS (gbb
);
558 if (VEC_empty (gimple
, conditions
))
561 fprintf (file
, "conditions bb_%d (", GBB_BB (gbb
)->index
);
563 for (i
= 0; VEC_iterate (gimple
, conditions
, i
, stmt
); i
++)
564 print_gimple_stmt (file
, stmt
, 0, 0);
566 fprintf (file
, ")\n");
569 /* Print to FILE all the data references of PBB. */
572 print_pdrs (FILE *file
, poly_bb_p pbb
)
577 for (i
= 0; VEC_iterate (poly_dr_p
, PBB_DRS (pbb
), i
, pdr
); i
++)
578 print_pdr (file
, pdr
);
581 /* Print to STDERR all the data references of PBB. */
584 debug_pdrs (poly_bb_p pbb
)
586 print_pdrs (stderr
, pbb
);
589 /* Print to FILE the domain and scattering function of PBB. */
592 print_pbb (FILE *file
, poly_bb_p pbb
)
594 fprintf (file
, "pbb_%d (\n", pbb_index (pbb
));
595 dump_gbb_conditions (file
, PBB_BLACK_BOX (pbb
));
596 dump_gbb_cases (file
, PBB_BLACK_BOX (pbb
));
597 print_pdrs (file
, pbb
);
598 print_pbb_domain (file
, pbb
);
599 print_scattering_function (file
, pbb
);
600 fprintf (file
, ")\n");
603 /* Print to FILE the parameters of SCOP. */
606 print_scop_params (FILE *file
, scop_p scop
)
611 fprintf (file
, "parameters (\n");
612 for (i
= 0; VEC_iterate (tree
, SESE_PARAMS (SCOP_REGION (scop
)), i
, t
); i
++)
614 fprintf (file
, "p_%d -> ", i
);
615 print_generic_expr (file
, t
, 0);
616 fprintf (file
, "\n");
618 fprintf (file
, ")\n");
621 /* Print to FILE the context of SCoP. */
623 print_scop_context (FILE *file
, scop_p scop
)
627 fprintf (file
, "context (\n");
628 fprintf (file
, "# eq");
630 for (i
= 0; i
< scop_nb_params (scop
); i
++)
631 fprintf (file
, " p%d", (int) i
);
633 fprintf (file
, " cst\n");
635 if (SCOP_CONTEXT (scop
))
636 ppl_print_powerset_matrix (file
, SCOP_CONTEXT (scop
));
638 fprintf (file
, ")\n");
641 /* Print to FILE the SCOP. */
644 print_scop (FILE *file
, scop_p scop
)
649 fprintf (file
, "scop (\n");
650 print_scop_params (file
, scop
);
651 print_scop_context (file
, scop
);
653 for (i
= 0; VEC_iterate (poly_bb_p
, SCOP_BBS (scop
), i
, pbb
); i
++)
654 print_pbb (file
, pbb
);
656 fprintf (file
, "original_lst (\n");
657 print_lst (file
, SCOP_ORIGINAL_SCHEDULE (scop
), 0);
658 fprintf (file
, ")\n");
660 fprintf (file
, "transformed_lst (\n");
661 print_lst (file
, SCOP_TRANSFORMED_SCHEDULE (scop
), 0);
662 fprintf (file
, ")\n");
664 fprintf (file
, ")\n");
667 /* Print to STDERR the domain of PBB. */
670 debug_pbb_domain (poly_bb_p pbb
)
672 print_pbb_domain (stderr
, pbb
);
675 /* Print to FILE the domain and scattering function of PBB. */
678 debug_pbb (poly_bb_p pbb
)
680 print_pbb (stderr
, pbb
);
683 /* Print to STDERR the context of SCOP. */
686 debug_scop_context (scop_p scop
)
688 print_scop_context (stderr
, scop
);
691 /* Print to STDERR the SCOP. */
694 debug_scop (scop_p scop
)
696 print_scop (stderr
, scop
);
699 /* Print to STDERR the parameters of SCOP. */
702 debug_scop_params (scop_p scop
)
704 print_scop_params (stderr
, scop
);
708 /* The dimension in the transformed scattering polyhedron of PBB
709 containing the scattering iterator for the loop at depth LOOP_DEPTH. */
712 psct_scattering_dim_for_loop_depth (poly_bb_p pbb
, graphite_dim_t loop_depth
)
714 ppl_const_Constraint_System_t pcs
;
715 ppl_Constraint_System_const_iterator_t cit
, cend
;
716 ppl_const_Constraint_t cstr
;
717 ppl_Polyhedron_t ph
= PBB_TRANSFORMED_SCATTERING (pbb
);
718 ppl_dimension_type iter
= psct_iterator_dim (pbb
, loop_depth
);
719 ppl_Linear_Expression_t expr
;
720 ppl_Coefficient_t coef
;
725 ppl_new_Coefficient (&coef
);
726 ppl_Polyhedron_get_constraints (ph
, &pcs
);
727 ppl_new_Constraint_System_const_iterator (&cit
);
728 ppl_new_Constraint_System_const_iterator (&cend
);
730 for (ppl_Constraint_System_begin (pcs
, cit
),
731 ppl_Constraint_System_end (pcs
, cend
);
732 !ppl_Constraint_System_const_iterator_equal_test (cit
, cend
);
733 ppl_Constraint_System_const_iterator_increment (cit
))
735 ppl_Constraint_System_const_iterator_dereference (cit
, &cstr
);
736 ppl_new_Linear_Expression_from_Constraint (&expr
, cstr
);
737 ppl_Linear_Expression_coefficient (expr
, iter
, coef
);
738 ppl_Coefficient_to_mpz_t (coef
, val
);
740 if (value_zero_p (val
))
742 ppl_delete_Linear_Expression (expr
);
746 for (i
= 0; i
< pbb_nb_scattering_transform (pbb
); i
++)
748 ppl_dimension_type scatter
= psct_scattering_dim (pbb
, i
);
750 ppl_Linear_Expression_coefficient (expr
, scatter
, coef
);
751 ppl_Coefficient_to_mpz_t (coef
, val
);
753 if (value_notzero_p (val
))
756 ppl_delete_Linear_Expression (expr
);
757 ppl_delete_Coefficient (coef
);
758 ppl_delete_Constraint_System_const_iterator (cit
);
759 ppl_delete_Constraint_System_const_iterator (cend
);
769 /* Returns the number of iterations NITER of the loop around PBB at
773 pbb_number_of_iterations (poly_bb_p pbb
,
774 graphite_dim_t loop_depth
,
777 ppl_Linear_Expression_t le
;
778 ppl_dimension_type dim
;
780 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (PBB_DOMAIN (pbb
), &dim
);
781 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
782 ppl_set_coef (le
, pbb_iterator_dim (pbb
, loop_depth
), 1);
783 value_set_si (niter
, -1);
784 ppl_max_for_le_pointset (PBB_DOMAIN (pbb
), le
, niter
);
785 ppl_delete_Linear_Expression (le
);
788 /* Returns the number of iterations NITER of the loop around PBB at
789 time(scattering) dimension TIME_DEPTH. */
792 pbb_number_of_iterations_at_time (poly_bb_p pbb
,
793 graphite_dim_t time_depth
,
796 ppl_Pointset_Powerset_C_Polyhedron_t ext_domain
, sctr
;
797 ppl_Linear_Expression_t le
;
798 ppl_dimension_type dim
;
800 /* Takes together domain and scattering polyhedrons, and composes
801 them into the bigger polyhedron that has the following format:
803 t0..t_{n-1} | l0..l_{nlcl-1} | i0..i_{niter-1} | g0..g_{nparm-1}
806 | t0..t_{n-1} are time dimensions (scattering dimensions)
807 | l0..l_{nclc-1} are local variables in scattering function
808 | i0..i_{niter-1} are original iteration variables
809 | g0..g_{nparam-1} are global parameters. */
811 ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron (&sctr
,
812 PBB_TRANSFORMED_SCATTERING (pbb
));
814 /* Extend the iteration domain with the scattering dimensions:
815 0..0 | 0..0 | i0..i_{niter-1} | g0..g_{nparm-1}. */
816 ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
817 (&ext_domain
, PBB_DOMAIN (pbb
));
818 ppl_insert_dimensions_pointset (ext_domain
, 0,
819 pbb_nb_scattering_transform (pbb
)
820 + pbb_nb_local_vars (pbb
));
822 /* Add to sctr the extended domain. */
823 ppl_Pointset_Powerset_C_Polyhedron_intersection_assign (sctr
, ext_domain
);
825 /* Extract the number of iterations. */
826 ppl_Pointset_Powerset_C_Polyhedron_space_dimension (sctr
, &dim
);
827 ppl_new_Linear_Expression_with_dimension (&le
, dim
);
828 ppl_set_coef (le
, time_depth
, 1);
829 value_set_si (niter
, -1);
830 ppl_max_for_le_pointset (sctr
, le
, niter
);
832 ppl_delete_Linear_Expression (le
);
833 ppl_delete_Pointset_Powerset_C_Polyhedron (sctr
);
834 ppl_delete_Pointset_Powerset_C_Polyhedron (ext_domain
);
837 /* Translates LOOP to LST. */
840 loop_to_lst (loop_p loop
, VEC (poly_bb_p
, heap
) *bbs
, int *i
)
843 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
845 for (; VEC_iterate (poly_bb_p
, bbs
, *i
, pbb
); (*i
)++)
848 basic_block bb
= GBB_BB (PBB_BLACK_BOX (pbb
));
850 if (bb
->loop_father
== loop
)
851 stmt
= new_lst_stmt (pbb
);
852 else if (flow_bb_inside_loop_p (loop
, bb
))
854 loop_p next
= loop
->inner
;
856 while (next
&& !flow_bb_inside_loop_p (next
, bb
))
859 stmt
= loop_to_lst (next
, bbs
, i
);
864 return new_lst_loop (seq
);
867 VEC_safe_push (lst_p
, heap
, seq
, stmt
);
870 return new_lst_loop (seq
);
873 /* Reads the original scattering of the SCOP and returns an LST
877 scop_to_lst (scop_p scop
)
880 int i
, n
= VEC_length (poly_bb_p
, SCOP_BBS (scop
));
881 VEC (lst_p
, heap
) *seq
= VEC_alloc (lst_p
, heap
, 5);
882 sese region
= SCOP_REGION (scop
);
884 for (i
= 0; i
< n
; i
++)
886 poly_bb_p pbb
= VEC_index (poly_bb_p
, SCOP_BBS (scop
), i
);
887 loop_p loop
= outermost_loop_in_sese (region
, GBB_BB (PBB_BLACK_BOX (pbb
)));
889 if (loop_in_sese_p (loop
, region
))
890 res
= loop_to_lst (loop
, SCOP_BBS (scop
), &i
);
892 res
= new_lst_stmt (pbb
);
894 VEC_safe_push (lst_p
, heap
, seq
, res
);
897 res
= new_lst_loop (seq
);
898 SCOP_ORIGINAL_SCHEDULE (scop
) = res
;
899 SCOP_TRANSFORMED_SCHEDULE (scop
) = copy_lst (res
);
902 /* Print LST to FILE with INDENT spaces of indentation. */
905 print_lst (FILE *file
, lst_p lst
, int indent
)
910 indent_to (file
, indent
);
912 if (LST_LOOP_P (lst
))
917 if (LST_LOOP_FATHER (lst
))
918 fprintf (file
, "%d (loop", lst_dewey_number (lst
));
920 fprintf (file
, "(root");
922 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
923 print_lst (file
, l
, indent
+ 2);
928 fprintf (file
, "%d stmt_%d", lst_dewey_number (lst
), pbb_index (LST_PBB (lst
)));
931 /* Print LST to STDERR. */
934 debug_lst (lst_p lst
)
936 print_lst (stderr
, lst
, 0);
939 /* Pretty print to FILE the loop statement tree LST in DOT format. */
942 dot_lst_1 (FILE *file
, lst_p lst
)
947 if (LST_LOOP_P (lst
))
952 if (!LST_LOOP_FATHER (lst
))
953 fprintf (file
, "L -> L_%d_%d\n",
955 lst_dewey_number (lst
));
957 fprintf (file
, "L_%d_%d -> L_%d_%d\n",
958 lst_depth (LST_LOOP_FATHER (lst
)),
959 lst_dewey_number (LST_LOOP_FATHER (lst
)),
961 lst_dewey_number (lst
));
963 for (i
= 0; VEC_iterate (lst_p
, LST_SEQ (lst
), i
, l
); i
++)
968 fprintf (file
, "L_%d_%d -> S_%d\n",
969 lst_depth (LST_LOOP_FATHER (lst
)),
970 lst_dewey_number (LST_LOOP_FATHER (lst
)),
971 pbb_index (LST_PBB (lst
)));
975 /* Display the LST using dotty. */
980 /* When debugging, enable the following code. This cannot be used
981 in production compilers because it calls "system". */
984 FILE *stream
= fopen ("/tmp/lst.dot", "w");
987 fputs ("digraph all {\n", stream
);
988 dot_lst_1 (stream
, lst
);
989 fputs ("}\n\n", stream
);
992 x
= system ("dotty /tmp/lst.dot");
994 fputs ("digraph all {\n", stderr
);
995 dot_lst_1 (stderr
, lst
);
996 fputs ("}\n\n", stderr
);