2 * Copyright 2011 Leiden University. All rights reserved.
3 * Copyright 2012-2013 Ecole Normale Superieure. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY LEIDEN UNIVERSITY ''AS IS'' AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL LEIDEN UNIVERSITY OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
24 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * The views and conclusions contained in the software and documentation
30 * are those of the authors and should not be interpreted as
31 * representing official policies, either expressed or implied, of
36 #include <isl/constraint.h>
37 #include <isl/union_set.h>
41 #define ARRAY_SIZE(array) (sizeof(array)/sizeof(*array))
43 static char *type_str
[] = {
44 [pet_expr_access
] = "access",
45 [pet_expr_call
] = "call",
46 [pet_expr_cast
] = "cast",
47 [pet_expr_double
] = "double",
48 [pet_expr_unary
] = "unary",
49 [pet_expr_binary
] = "binary",
50 [pet_expr_ternary
] = "ternary"
53 static char *op_str
[] = {
54 [pet_op_add_assign
] = "+=",
55 [pet_op_sub_assign
] = "-=",
56 [pet_op_mul_assign
] = "*=",
57 [pet_op_div_assign
] = "/=",
58 [pet_op_assign
] = "=",
69 [pet_op_post_inc
] = "++",
70 [pet_op_post_dec
] = "--",
71 [pet_op_pre_inc
] = "++",
72 [pet_op_pre_dec
] = "--",
73 [pet_op_address_of
] = "&",
74 [pet_op_kill
] = "kill"
77 /* pet_scop with extra information that is only used during parsing.
79 * In particular, we keep track of conditions under which we want
80 * to skip the rest of the current loop iteration (skip[pet_skip_now])
81 * and of conditions under which we want to skip subsequent
82 * loop iterations (skip[pet_skip_later]).
84 * The conditions are represented as index expressions defined
85 * over a zero-dimensiona domain. The index expression is either
86 * a boolean affine expression or an access to a variable, which
87 * is assumed to attain values zero and one. The condition holds
88 * if the variable has value one or if the affine expression
89 * has value one (typically for only part of the parameter space).
91 * A missing condition (skip[type] == NULL) means that we don't want
97 isl_multi_pw_aff
*skip
[2];
100 const char *pet_op_str(enum pet_op_type op
)
105 int pet_op_is_inc_dec(enum pet_op_type op
)
107 return op
== pet_op_post_inc
|| op
== pet_op_post_dec
||
108 op
== pet_op_pre_inc
|| op
== pet_op_pre_dec
;
111 const char *pet_type_str(enum pet_expr_type type
)
113 return type_str
[type
];
116 enum pet_op_type
pet_str_op(const char *str
)
120 for (i
= 0; i
< ARRAY_SIZE(op_str
); ++i
)
121 if (!strcmp(op_str
[i
], str
))
127 enum pet_expr_type
pet_str_type(const char *str
)
131 for (i
= 0; i
< ARRAY_SIZE(type_str
); ++i
)
132 if (!strcmp(type_str
[i
], str
))
138 /* Construct a pet_expr from an access relation.
139 * By default, it is considered to be a read access.
141 struct pet_expr
*pet_expr_from_access(__isl_take isl_map
*access
)
143 isl_ctx
*ctx
= isl_map_get_ctx(access
);
144 struct pet_expr
*expr
;
148 expr
= isl_calloc_type(ctx
, struct pet_expr
);
152 expr
->type
= pet_expr_access
;
153 expr
->acc
.access
= access
;
159 isl_map_free(access
);
163 /* Construct an access pet_expr from an index expression.
164 * By default, the access is considered to be a read access.
166 struct pet_expr
*pet_expr_from_index(__isl_take isl_multi_pw_aff
*index
)
170 access
= isl_map_from_multi_pw_aff(index
);
171 return pet_expr_from_access(access
);
174 /* Construct an access pet_expr from an index expression and
175 * the depth of the accessed array.
176 * By default, the access is considered to be a read access.
178 * If the number of indices is smaller than the depth of the array,
179 * then we assume that all elements of the remaining dimensions
182 struct pet_expr
*pet_expr_from_index_and_depth(
183 __isl_take isl_multi_pw_aff
*index
, int depth
)
189 access
= isl_map_from_multi_pw_aff(index
);
192 dim
= isl_map_dim(access
, isl_dim_out
);
194 isl_die(isl_map_get_ctx(access
), isl_error_internal
,
195 "number of indices greater than depth",
196 access
= isl_map_free(access
));
198 return pet_expr_from_access(access
);
200 id
= isl_map_get_tuple_id(access
, isl_dim_out
);
201 access
= isl_map_add_dims(access
, isl_dim_out
, depth
- dim
);
202 access
= isl_map_set_tuple_id(access
, isl_dim_out
, id
);
204 return pet_expr_from_access(access
);
207 /* Construct a pet_expr that kills the elements specified by "access".
209 struct pet_expr
*pet_expr_kill_from_access(__isl_take isl_map
*access
)
212 struct pet_expr
*expr
;
214 ctx
= isl_map_get_ctx(access
);
215 expr
= pet_expr_from_access(access
);
219 return pet_expr_new_unary(ctx
, pet_op_kill
, expr
);
222 /* Construct a pet_expr that kills the elements specified by
223 * the index expression "index" and the access relation "access".
225 * We currently ignore "index".
227 struct pet_expr
*pet_expr_kill_from_access_and_index(__isl_take isl_map
*access
,
228 __isl_take isl_multi_pw_aff
*index
)
230 if (!access
|| !index
)
232 isl_multi_pw_aff_free(index
);
233 return pet_expr_kill_from_access(access
);
235 isl_map_free(access
);
236 isl_multi_pw_aff_free(index
);
240 /* Construct a unary pet_expr that performs "op" on "arg".
242 struct pet_expr
*pet_expr_new_unary(isl_ctx
*ctx
, enum pet_op_type op
,
243 struct pet_expr
*arg
)
245 struct pet_expr
*expr
;
249 expr
= isl_alloc_type(ctx
, struct pet_expr
);
253 expr
->type
= pet_expr_unary
;
256 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
259 expr
->args
[pet_un_arg
] = arg
;
267 /* Construct a binary pet_expr that performs "op" on "lhs" and "rhs".
269 struct pet_expr
*pet_expr_new_binary(isl_ctx
*ctx
, enum pet_op_type op
,
270 struct pet_expr
*lhs
, struct pet_expr
*rhs
)
272 struct pet_expr
*expr
;
276 expr
= isl_alloc_type(ctx
, struct pet_expr
);
280 expr
->type
= pet_expr_binary
;
283 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 2);
286 expr
->args
[pet_bin_lhs
] = lhs
;
287 expr
->args
[pet_bin_rhs
] = rhs
;
296 /* Construct a ternary pet_expr that performs "cond" ? "lhs" : "rhs".
298 struct pet_expr
*pet_expr_new_ternary(isl_ctx
*ctx
, struct pet_expr
*cond
,
299 struct pet_expr
*lhs
, struct pet_expr
*rhs
)
301 struct pet_expr
*expr
;
303 if (!cond
|| !lhs
|| !rhs
)
305 expr
= isl_alloc_type(ctx
, struct pet_expr
);
309 expr
->type
= pet_expr_ternary
;
311 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 3);
314 expr
->args
[pet_ter_cond
] = cond
;
315 expr
->args
[pet_ter_true
] = lhs
;
316 expr
->args
[pet_ter_false
] = rhs
;
326 /* Construct a call pet_expr that calls function "name" with "n_arg"
327 * arguments. The caller is responsible for filling in the arguments.
329 struct pet_expr
*pet_expr_new_call(isl_ctx
*ctx
, const char *name
,
332 struct pet_expr
*expr
;
334 expr
= isl_alloc_type(ctx
, struct pet_expr
);
338 expr
->type
= pet_expr_call
;
340 expr
->name
= strdup(name
);
341 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, n_arg
);
342 if (!expr
->name
|| !expr
->args
)
343 return pet_expr_free(expr
);
348 /* Construct a pet_expr that represents the cast of "arg" to "type_name".
350 struct pet_expr
*pet_expr_new_cast(isl_ctx
*ctx
, const char *type_name
,
351 struct pet_expr
*arg
)
353 struct pet_expr
*expr
;
358 expr
= isl_alloc_type(ctx
, struct pet_expr
);
362 expr
->type
= pet_expr_cast
;
364 expr
->type_name
= strdup(type_name
);
365 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
366 if (!expr
->type_name
|| !expr
->args
)
378 /* Construct a pet_expr that represents the double "d".
380 struct pet_expr
*pet_expr_new_double(isl_ctx
*ctx
, double val
, const char *s
)
382 struct pet_expr
*expr
;
384 expr
= isl_calloc_type(ctx
, struct pet_expr
);
388 expr
->type
= pet_expr_double
;
390 expr
->d
.s
= strdup(s
);
392 return pet_expr_free(expr
);
397 void *pet_expr_free(struct pet_expr
*expr
)
404 for (i
= 0; i
< expr
->n_arg
; ++i
)
405 pet_expr_free(expr
->args
[i
]);
408 switch (expr
->type
) {
409 case pet_expr_access
:
410 isl_id_free(expr
->acc
.ref_id
);
411 isl_map_free(expr
->acc
.access
);
417 free(expr
->type_name
);
419 case pet_expr_double
:
423 case pet_expr_binary
:
424 case pet_expr_ternary
:
432 static void expr_dump(struct pet_expr
*expr
, int indent
)
439 fprintf(stderr
, "%*s", indent
, "");
441 switch (expr
->type
) {
442 case pet_expr_double
:
443 fprintf(stderr
, "%s\n", expr
->d
.s
);
445 case pet_expr_access
:
446 isl_id_dump(expr
->acc
.ref_id
);
447 fprintf(stderr
, "%*s", indent
, "");
448 isl_map_dump(expr
->acc
.access
);
449 fprintf(stderr
, "%*sread: %d\n", indent
+ 2,
451 fprintf(stderr
, "%*swrite: %d\n", indent
+ 2,
452 "", expr
->acc
.write
);
453 for (i
= 0; i
< expr
->n_arg
; ++i
)
454 expr_dump(expr
->args
[i
], indent
+ 2);
457 fprintf(stderr
, "%s\n", op_str
[expr
->op
]);
458 expr_dump(expr
->args
[pet_un_arg
], indent
+ 2);
460 case pet_expr_binary
:
461 fprintf(stderr
, "%s\n", op_str
[expr
->op
]);
462 expr_dump(expr
->args
[pet_bin_lhs
], indent
+ 2);
463 expr_dump(expr
->args
[pet_bin_rhs
], indent
+ 2);
465 case pet_expr_ternary
:
466 fprintf(stderr
, "?:\n");
467 expr_dump(expr
->args
[pet_ter_cond
], indent
+ 2);
468 expr_dump(expr
->args
[pet_ter_true
], indent
+ 2);
469 expr_dump(expr
->args
[pet_ter_false
], indent
+ 2);
472 fprintf(stderr
, "%s/%d\n", expr
->name
, expr
->n_arg
);
473 for (i
= 0; i
< expr
->n_arg
; ++i
)
474 expr_dump(expr
->args
[i
], indent
+ 2);
477 fprintf(stderr
, "(%s)\n", expr
->type_name
);
478 for (i
= 0; i
< expr
->n_arg
; ++i
)
479 expr_dump(expr
->args
[i
], indent
+ 2);
484 void pet_expr_dump(struct pet_expr
*expr
)
489 /* Does "expr" represent an access to an unnamed space, i.e.,
490 * does it represent an affine expression?
492 int pet_expr_is_affine(struct pet_expr
*expr
)
498 if (expr
->type
!= pet_expr_access
)
501 has_id
= isl_map_has_tuple_id(expr
->acc
.access
, isl_dim_out
);
508 /* Return the identifier of the array accessed by "expr".
510 __isl_give isl_id
*pet_expr_access_get_id(struct pet_expr
*expr
)
514 if (expr
->type
!= pet_expr_access
)
516 return isl_map_get_tuple_id(expr
->acc
.access
, isl_dim_out
);
519 /* Does "expr" represent an access to a scalar, i.e., zero-dimensional array?
521 int pet_expr_is_scalar_access(struct pet_expr
*expr
)
525 if (expr
->type
!= pet_expr_access
)
528 return isl_map_dim(expr
->acc
.access
, isl_dim_out
) == 0;
531 /* Return 1 if the two pet_exprs are equivalent.
533 int pet_expr_is_equal(struct pet_expr
*expr1
, struct pet_expr
*expr2
)
537 if (!expr1
|| !expr2
)
540 if (expr1
->type
!= expr2
->type
)
542 if (expr1
->n_arg
!= expr2
->n_arg
)
544 for (i
= 0; i
< expr1
->n_arg
; ++i
)
545 if (!pet_expr_is_equal(expr1
->args
[i
], expr2
->args
[i
]))
547 switch (expr1
->type
) {
548 case pet_expr_double
:
549 if (strcmp(expr1
->d
.s
, expr2
->d
.s
))
551 if (expr1
->d
.val
!= expr2
->d
.val
)
554 case pet_expr_access
:
555 if (expr1
->acc
.read
!= expr2
->acc
.read
)
557 if (expr1
->acc
.write
!= expr2
->acc
.write
)
559 if (expr1
->acc
.ref_id
!= expr2
->acc
.ref_id
)
561 if (!expr1
->acc
.access
|| !expr2
->acc
.access
)
563 if (!isl_map_is_equal(expr1
->acc
.access
, expr2
->acc
.access
))
567 case pet_expr_binary
:
568 case pet_expr_ternary
:
569 if (expr1
->op
!= expr2
->op
)
573 if (strcmp(expr1
->name
, expr2
->name
))
577 if (strcmp(expr1
->type_name
, expr2
->type_name
))
585 /* Add extra conditions on the parameters to all access relations in "expr".
587 struct pet_expr
*pet_expr_restrict(struct pet_expr
*expr
,
588 __isl_take isl_set
*cond
)
595 for (i
= 0; i
< expr
->n_arg
; ++i
) {
596 expr
->args
[i
] = pet_expr_restrict(expr
->args
[i
],
602 if (expr
->type
== pet_expr_access
) {
603 expr
->acc
.access
= isl_map_intersect_params(expr
->acc
.access
,
605 if (!expr
->acc
.access
)
613 return pet_expr_free(expr
);
616 /* Modify all expressions of type pet_expr_access in "expr"
617 * by calling "fn" on them.
619 struct pet_expr
*pet_expr_map_access(struct pet_expr
*expr
,
620 struct pet_expr
*(*fn
)(struct pet_expr
*expr
, void *user
),
628 for (i
= 0; i
< expr
->n_arg
; ++i
) {
629 expr
->args
[i
] = pet_expr_map_access(expr
->args
[i
], fn
, user
);
631 return pet_expr_free(expr
);
634 if (expr
->type
== pet_expr_access
)
635 expr
= fn(expr
, user
);
640 /* Call "fn" on each of the subexpressions of "expr" of type pet_expr_access.
642 * Return -1 on error (where fn return a negative value is treated as an error).
643 * Otherwise return 0.
645 int pet_expr_foreach_access_expr(struct pet_expr
*expr
,
646 int (*fn
)(struct pet_expr
*expr
, void *user
), void *user
)
653 for (i
= 0; i
< expr
->n_arg
; ++i
)
654 if (pet_expr_foreach_access_expr(expr
->args
[i
], fn
, user
) < 0)
657 if (expr
->type
== pet_expr_access
)
658 return fn(expr
, user
);
663 /* Modify the access relation of the given access expression
664 * based on the given iteration space transformation.
665 * If the access has any arguments then the domain of the access relation
666 * is a wrapped mapping from the iteration space to the space of
667 * argument values. We only need to change the domain of this wrapped
668 * mapping, so we extend the input transformation with an identity mapping
669 * on the space of argument values.
671 static struct pet_expr
*update_domain(struct pet_expr
*expr
, void *user
)
673 isl_map
*update
= user
;
676 update
= isl_map_copy(update
);
678 space
= isl_map_get_space(expr
->acc
.access
);
679 space
= isl_space_domain(space
);
680 if (!isl_space_is_wrapping(space
))
681 isl_space_free(space
);
684 space
= isl_space_unwrap(space
);
685 space
= isl_space_range(space
);
686 space
= isl_space_map_from_set(space
);
687 id
= isl_map_identity(space
);
688 update
= isl_map_product(update
, id
);
691 expr
->acc
.access
= isl_map_apply_domain(expr
->acc
.access
, update
);
692 if (!expr
->acc
.access
)
693 return pet_expr_free(expr
);
698 /* Modify all access relations in "expr" based on the given iteration space
701 static struct pet_expr
*expr_update_domain(struct pet_expr
*expr
,
702 __isl_take isl_map
*update
)
704 expr
= pet_expr_map_access(expr
, &update_domain
, update
);
705 isl_map_free(update
);
709 /* Construct a pet_stmt with given line number and statement
710 * number from a pet_expr.
711 * The initial iteration domain is the zero-dimensional universe.
712 * The name of the domain is given by "label" if it is non-NULL.
713 * Otherwise, the name is constructed as S_<id>.
714 * The domains of all access relations are modified to refer
715 * to the statement iteration domain.
717 struct pet_stmt
*pet_stmt_from_pet_expr(isl_ctx
*ctx
, int line
,
718 __isl_take isl_id
*label
, int id
, struct pet_expr
*expr
)
720 struct pet_stmt
*stmt
;
730 stmt
= isl_calloc_type(ctx
, struct pet_stmt
);
734 dim
= isl_space_set_alloc(ctx
, 0, 0);
736 dim
= isl_space_set_tuple_id(dim
, isl_dim_set
, label
);
738 snprintf(name
, sizeof(name
), "S_%d", id
);
739 dim
= isl_space_set_tuple_name(dim
, isl_dim_set
, name
);
741 dom
= isl_set_universe(isl_space_copy(dim
));
742 sched
= isl_map_from_domain(isl_set_copy(dom
));
744 dim
= isl_space_from_range(dim
);
745 add_name
= isl_map_universe(dim
);
746 expr
= expr_update_domain(expr
, add_name
);
750 stmt
->schedule
= sched
;
753 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
754 return pet_stmt_free(stmt
);
759 return pet_expr_free(expr
);
762 void *pet_stmt_free(struct pet_stmt
*stmt
)
769 isl_set_free(stmt
->domain
);
770 isl_map_free(stmt
->schedule
);
771 pet_expr_free(stmt
->body
);
773 for (i
= 0; i
< stmt
->n_arg
; ++i
)
774 pet_expr_free(stmt
->args
[i
]);
781 static void stmt_dump(struct pet_stmt
*stmt
, int indent
)
788 fprintf(stderr
, "%*s%d\n", indent
, "", stmt
->line
);
789 fprintf(stderr
, "%*s", indent
, "");
790 isl_set_dump(stmt
->domain
);
791 fprintf(stderr
, "%*s", indent
, "");
792 isl_map_dump(stmt
->schedule
);
793 expr_dump(stmt
->body
, indent
);
794 for (i
= 0; i
< stmt
->n_arg
; ++i
)
795 expr_dump(stmt
->args
[i
], indent
+ 2);
798 void pet_stmt_dump(struct pet_stmt
*stmt
)
803 struct pet_array
*pet_array_free(struct pet_array
*array
)
808 isl_set_free(array
->context
);
809 isl_set_free(array
->extent
);
810 isl_set_free(array
->value_bounds
);
811 free(array
->element_type
);
817 void pet_array_dump(struct pet_array
*array
)
822 isl_set_dump(array
->context
);
823 isl_set_dump(array
->extent
);
824 isl_set_dump(array
->value_bounds
);
825 fprintf(stderr
, "%s %s\n", array
->element_type
,
826 array
->live_out
? "live-out" : "");
829 /* Alloc a pet_scop structure, with extra room for information that
830 * is only used during parsing.
832 struct pet_scop
*pet_scop_alloc(isl_ctx
*ctx
)
834 return &isl_calloc_type(ctx
, struct pet_scop_ext
)->scop
;
837 /* Construct a pet_scop with room for n statements.
839 static struct pet_scop
*scop_alloc(isl_ctx
*ctx
, int n
)
842 struct pet_scop
*scop
;
844 scop
= pet_scop_alloc(ctx
);
848 space
= isl_space_params_alloc(ctx
, 0);
849 scop
->context
= isl_set_universe(isl_space_copy(space
));
850 scop
->context_value
= isl_set_universe(space
);
851 scop
->stmts
= isl_calloc_array(ctx
, struct pet_stmt
*, n
);
852 if (!scop
->context
|| !scop
->stmts
)
853 return pet_scop_free(scop
);
860 struct pet_scop
*pet_scop_empty(isl_ctx
*ctx
)
862 return scop_alloc(ctx
, 0);
865 /* Update "context" with respect to the valid parameter values for "access".
867 static __isl_give isl_set
*access_extract_context(__isl_keep isl_map
*access
,
868 __isl_take isl_set
*context
)
870 context
= isl_set_intersect(context
,
871 isl_map_params(isl_map_copy(access
)));
875 /* Update "context" with respect to the valid parameter values for "expr".
877 * If "expr" represents a ternary operator, then a parameter value
878 * needs to be valid for the condition and for at least one of the
879 * remaining two arguments.
880 * If the condition is an affine expression, then we can be a bit more specific.
881 * The parameter then has to be valid for the second argument for
882 * non-zero accesses and valid for the third argument for zero accesses.
884 static __isl_give isl_set
*expr_extract_context(struct pet_expr
*expr
,
885 __isl_take isl_set
*context
)
889 if (expr
->type
== pet_expr_ternary
) {
891 isl_set
*context1
, *context2
;
893 is_aff
= pet_expr_is_affine(expr
->args
[0]);
897 context
= expr_extract_context(expr
->args
[0], context
);
898 context1
= expr_extract_context(expr
->args
[1],
899 isl_set_copy(context
));
900 context2
= expr_extract_context(expr
->args
[2], context
);
906 access
= isl_map_copy(expr
->args
[0]->acc
.access
);
907 access
= isl_map_fix_si(access
, isl_dim_out
, 0, 0);
908 zero_set
= isl_map_params(access
);
909 context1
= isl_set_subtract(context1
,
910 isl_set_copy(zero_set
));
911 context2
= isl_set_intersect(context2
, zero_set
);
914 context
= isl_set_union(context1
, context2
);
915 context
= isl_set_coalesce(context
);
920 for (i
= 0; i
< expr
->n_arg
; ++i
)
921 context
= expr_extract_context(expr
->args
[i
], context
);
923 if (expr
->type
== pet_expr_access
)
924 context
= access_extract_context(expr
->acc
.access
, context
);
928 isl_set_free(context
);
932 /* Update "context" with respect to the valid parameter values for "stmt".
934 static __isl_give isl_set
*stmt_extract_context(struct pet_stmt
*stmt
,
935 __isl_take isl_set
*context
)
939 for (i
= 0; i
< stmt
->n_arg
; ++i
)
940 context
= expr_extract_context(stmt
->args
[i
], context
);
942 context
= expr_extract_context(stmt
->body
, context
);
947 /* Construct a pet_scop that contains the given pet_stmt.
949 struct pet_scop
*pet_scop_from_pet_stmt(isl_ctx
*ctx
, struct pet_stmt
*stmt
)
951 struct pet_scop
*scop
;
956 scop
= scop_alloc(ctx
, 1);
960 scop
->context
= stmt_extract_context(stmt
, scop
->context
);
964 scop
->stmts
[0] = stmt
;
973 /* Does "mpa" represent an access to an element of an unnamed space, i.e.,
974 * does it represent an affine expression?
976 static int multi_pw_aff_is_affine(__isl_keep isl_multi_pw_aff
*mpa
)
980 has_id
= isl_multi_pw_aff_has_tuple_id(mpa
, isl_dim_out
);
987 /* Return the piecewise affine expression "set ? 1 : 0" defined on "dom".
989 static __isl_give isl_pw_aff
*indicator_function(__isl_take isl_set
*set
,
990 __isl_take isl_set
*dom
)
993 pa
= isl_set_indicator_function(set
);
994 pa
= isl_pw_aff_intersect_domain(pa
, dom
);
998 /* Return "lhs || rhs", defined on the shared definition domain.
1000 static __isl_give isl_pw_aff
*pw_aff_or(__isl_take isl_pw_aff
*lhs
,
1001 __isl_take isl_pw_aff
*rhs
)
1006 dom
= isl_set_intersect(isl_pw_aff_domain(isl_pw_aff_copy(lhs
)),
1007 isl_pw_aff_domain(isl_pw_aff_copy(rhs
)));
1008 cond
= isl_set_union(isl_pw_aff_non_zero_set(lhs
),
1009 isl_pw_aff_non_zero_set(rhs
));
1010 cond
= isl_set_coalesce(cond
);
1011 return indicator_function(cond
, dom
);
1014 /* Combine ext1->skip[type] and ext2->skip[type] into ext->skip[type].
1015 * ext may be equal to either ext1 or ext2.
1017 * The two skips that need to be combined are assumed to be affine expressions.
1019 * We need to skip in ext if we need to skip in either ext1 or ext2.
1020 * We don't need to skip in ext if we don't need to skip in both ext1 and ext2.
1022 static struct pet_scop_ext
*combine_skips(struct pet_scop_ext
*ext
,
1023 struct pet_scop_ext
*ext1
, struct pet_scop_ext
*ext2
,
1026 isl_pw_aff
*skip
, *skip1
, *skip2
;
1030 if (!ext1
->skip
[type
] && !ext2
->skip
[type
])
1032 if (!ext1
->skip
[type
]) {
1035 ext
->skip
[type
] = ext2
->skip
[type
];
1036 ext2
->skip
[type
] = NULL
;
1039 if (!ext2
->skip
[type
]) {
1042 ext
->skip
[type
] = ext1
->skip
[type
];
1043 ext1
->skip
[type
] = NULL
;
1047 if (!multi_pw_aff_is_affine(ext1
->skip
[type
]) ||
1048 !multi_pw_aff_is_affine(ext2
->skip
[type
]))
1049 isl_die(isl_multi_pw_aff_get_ctx(ext1
->skip
[type
]),
1050 isl_error_internal
, "can only combine affine skips",
1051 return pet_scop_free(&ext
->scop
));
1053 skip1
= isl_multi_pw_aff_get_pw_aff(ext1
->skip
[type
], 0);
1054 skip2
= isl_multi_pw_aff_get_pw_aff(ext2
->skip
[type
], 0);
1055 skip
= pw_aff_or(skip1
, skip2
);
1056 isl_multi_pw_aff_free(ext1
->skip
[type
]);
1057 ext1
->skip
[type
] = NULL
;
1058 isl_multi_pw_aff_free(ext2
->skip
[type
]);
1059 ext2
->skip
[type
] = NULL
;
1060 ext
->skip
[type
] = isl_multi_pw_aff_from_pw_aff(skip
);
1061 if (!ext
->skip
[type
])
1062 return pet_scop_free(&ext
->scop
);
1067 /* Combine scop1->skip[type] and scop2->skip[type] into scop->skip[type],
1068 * where type takes on the values pet_skip_now and pet_skip_later.
1069 * scop may be equal to either scop1 or scop2.
1071 static struct pet_scop
*scop_combine_skips(struct pet_scop
*scop
,
1072 struct pet_scop
*scop1
, struct pet_scop
*scop2
)
1074 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1075 struct pet_scop_ext
*ext1
= (struct pet_scop_ext
*) scop1
;
1076 struct pet_scop_ext
*ext2
= (struct pet_scop_ext
*) scop2
;
1078 ext
= combine_skips(ext
, ext1
, ext2
, pet_skip_now
);
1079 ext
= combine_skips(ext
, ext1
, ext2
, pet_skip_later
);
1083 /* Update scop->start and scop->end to include the region from "start"
1084 * to "end". In particular, if scop->end == 0, then "scop" does not
1085 * have any offset information yet and we simply take the information
1086 * from "start" and "end". Otherwise, we update the fields if the
1087 * region from "start" to "end" is not already included.
1089 struct pet_scop
*pet_scop_update_start_end(struct pet_scop
*scop
,
1090 unsigned start
, unsigned end
)
1094 if (scop
->end
== 0) {
1095 scop
->start
= start
;
1098 if (start
< scop
->start
)
1099 scop
->start
= start
;
1100 if (end
> scop
->end
)
1107 /* Does "implication" appear in the list of implications of "scop"?
1109 static int is_known_implication(struct pet_scop
*scop
,
1110 struct pet_implication
*implication
)
1114 for (i
= 0; i
< scop
->n_implication
; ++i
) {
1115 struct pet_implication
*pi
= scop
->implications
[i
];
1118 if (pi
->satisfied
!= implication
->satisfied
)
1120 equal
= isl_map_is_equal(pi
->extension
, implication
->extension
);
1130 /* Store the concatenation of the impliciations of "scop1" and "scop2"
1131 * in "scop", removing duplicates (i.e., implications in "scop2" that
1132 * already appear in "scop1").
1134 static struct pet_scop
*scop_collect_implications(isl_ctx
*ctx
,
1135 struct pet_scop
*scop
, struct pet_scop
*scop1
, struct pet_scop
*scop2
)
1142 if (scop2
->n_implication
== 0) {
1143 scop
->n_implication
= scop1
->n_implication
;
1144 scop
->implications
= scop1
->implications
;
1145 scop1
->n_implication
= 0;
1146 scop1
->implications
= NULL
;
1150 if (scop1
->n_implication
== 0) {
1151 scop
->n_implication
= scop2
->n_implication
;
1152 scop
->implications
= scop2
->implications
;
1153 scop2
->n_implication
= 0;
1154 scop2
->implications
= NULL
;
1158 scop
->implications
= isl_calloc_array(ctx
, struct pet_implication
*,
1159 scop1
->n_implication
+ scop2
->n_implication
);
1160 if (!scop
->implications
)
1161 return pet_scop_free(scop
);
1163 for (i
= 0; i
< scop1
->n_implication
; ++i
) {
1164 scop
->implications
[i
] = scop1
->implications
[i
];
1165 scop1
->implications
[i
] = NULL
;
1168 scop
->n_implication
= scop1
->n_implication
;
1169 j
= scop1
->n_implication
;
1170 for (i
= 0; i
< scop2
->n_implication
; ++i
) {
1173 known
= is_known_implication(scop
, scop2
->implications
[i
]);
1175 return pet_scop_free(scop
);
1178 scop
->implications
[j
++] = scop2
->implications
[i
];
1179 scop2
->implications
[i
] = NULL
;
1181 scop
->n_implication
= j
;
1186 /* Combine the offset information of "scop1" and "scop2" into "scop".
1188 static struct pet_scop
*scop_combine_start_end(struct pet_scop
*scop
,
1189 struct pet_scop
*scop1
, struct pet_scop
*scop2
)
1192 scop
= pet_scop_update_start_end(scop
,
1193 scop1
->start
, scop1
->end
);
1195 scop
= pet_scop_update_start_end(scop
,
1196 scop2
->start
, scop2
->end
);
1200 /* Construct a pet_scop that contains the offset information,
1201 * arrays, statements and skip information in "scop1" and "scop2".
1203 static struct pet_scop
*pet_scop_add(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1204 struct pet_scop
*scop2
)
1207 struct pet_scop
*scop
= NULL
;
1209 if (!scop1
|| !scop2
)
1212 if (scop1
->n_stmt
== 0) {
1213 scop2
= scop_combine_skips(scop2
, scop1
, scop2
);
1214 pet_scop_free(scop1
);
1218 if (scop2
->n_stmt
== 0) {
1219 scop1
= scop_combine_skips(scop1
, scop1
, scop2
);
1220 pet_scop_free(scop2
);
1224 scop
= scop_alloc(ctx
, scop1
->n_stmt
+ scop2
->n_stmt
);
1228 scop
->arrays
= isl_calloc_array(ctx
, struct pet_array
*,
1229 scop1
->n_array
+ scop2
->n_array
);
1232 scop
->n_array
= scop1
->n_array
+ scop2
->n_array
;
1234 for (i
= 0; i
< scop1
->n_stmt
; ++i
) {
1235 scop
->stmts
[i
] = scop1
->stmts
[i
];
1236 scop1
->stmts
[i
] = NULL
;
1239 for (i
= 0; i
< scop2
->n_stmt
; ++i
) {
1240 scop
->stmts
[scop1
->n_stmt
+ i
] = scop2
->stmts
[i
];
1241 scop2
->stmts
[i
] = NULL
;
1244 for (i
= 0; i
< scop1
->n_array
; ++i
) {
1245 scop
->arrays
[i
] = scop1
->arrays
[i
];
1246 scop1
->arrays
[i
] = NULL
;
1249 for (i
= 0; i
< scop2
->n_array
; ++i
) {
1250 scop
->arrays
[scop1
->n_array
+ i
] = scop2
->arrays
[i
];
1251 scop2
->arrays
[i
] = NULL
;
1254 scop
= scop_collect_implications(ctx
, scop
, scop1
, scop2
);
1255 scop
= pet_scop_restrict_context(scop
, isl_set_copy(scop1
->context
));
1256 scop
= pet_scop_restrict_context(scop
, isl_set_copy(scop2
->context
));
1257 scop
= scop_combine_skips(scop
, scop1
, scop2
);
1258 scop
= scop_combine_start_end(scop
, scop1
, scop2
);
1260 pet_scop_free(scop1
);
1261 pet_scop_free(scop2
);
1264 pet_scop_free(scop1
);
1265 pet_scop_free(scop2
);
1266 pet_scop_free(scop
);
1270 /* Apply the skip condition "skip" to "scop".
1271 * That is, make sure "scop" is not executed when the condition holds.
1273 * If "skip" is an affine expression, we add the conditions under
1274 * which the expression is zero to the iteration domains.
1275 * Otherwise, we add a filter on the variable attaining the value zero.
1277 static struct pet_scop
*restrict_skip(struct pet_scop
*scop
,
1278 __isl_take isl_multi_pw_aff
*skip
)
1287 is_aff
= multi_pw_aff_is_affine(skip
);
1292 return pet_scop_filter(scop
, skip
, 0);
1294 pa
= isl_multi_pw_aff_get_pw_aff(skip
, 0);
1295 isl_multi_pw_aff_free(skip
);
1296 zero
= isl_set_params(isl_pw_aff_zero_set(pa
));
1297 scop
= pet_scop_restrict(scop
, zero
);
1301 isl_multi_pw_aff_free(skip
);
1302 return pet_scop_free(scop
);
1305 /* Construct a pet_scop that contains the arrays, statements and
1306 * skip information in "scop1" and "scop2", where the two scops
1307 * are executed "in sequence". That is, breaks and continues
1308 * in scop1 have an effect on scop2.
1310 struct pet_scop
*pet_scop_add_seq(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1311 struct pet_scop
*scop2
)
1313 if (scop1
&& pet_scop_has_skip(scop1
, pet_skip_now
))
1314 scop2
= restrict_skip(scop2
,
1315 pet_scop_get_skip(scop1
, pet_skip_now
));
1316 return pet_scop_add(ctx
, scop1
, scop2
);
1319 /* Construct a pet_scop that contains the arrays, statements and
1320 * skip information in "scop1" and "scop2", where the two scops
1321 * are executed "in parallel". That is, any break or continue
1322 * in scop1 has no effect on scop2.
1324 struct pet_scop
*pet_scop_add_par(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1325 struct pet_scop
*scop2
)
1327 return pet_scop_add(ctx
, scop1
, scop2
);
1330 void *pet_implication_free(struct pet_implication
*implication
)
1337 isl_map_free(implication
->extension
);
1343 void *pet_scop_free(struct pet_scop
*scop
)
1346 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1350 isl_set_free(scop
->context
);
1351 isl_set_free(scop
->context_value
);
1353 for (i
= 0; i
< scop
->n_array
; ++i
)
1354 pet_array_free(scop
->arrays
[i
]);
1357 for (i
= 0; i
< scop
->n_stmt
; ++i
)
1358 pet_stmt_free(scop
->stmts
[i
]);
1360 if (scop
->implications
)
1361 for (i
= 0; i
< scop
->n_implication
; ++i
)
1362 pet_implication_free(scop
->implications
[i
]);
1363 free(scop
->implications
);
1364 isl_multi_pw_aff_free(ext
->skip
[pet_skip_now
]);
1365 isl_multi_pw_aff_free(ext
->skip
[pet_skip_later
]);
1370 void pet_implication_dump(struct pet_implication
*implication
)
1375 fprintf(stderr
, "%d\n", implication
->satisfied
);
1376 isl_map_dump(implication
->extension
);
1379 void pet_scop_dump(struct pet_scop
*scop
)
1382 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1387 isl_set_dump(scop
->context
);
1388 isl_set_dump(scop
->context_value
);
1389 for (i
= 0; i
< scop
->n_array
; ++i
)
1390 pet_array_dump(scop
->arrays
[i
]);
1391 for (i
= 0; i
< scop
->n_stmt
; ++i
)
1392 pet_stmt_dump(scop
->stmts
[i
]);
1393 for (i
= 0; i
< scop
->n_implication
; ++i
)
1394 pet_implication_dump(scop
->implications
[i
]);
1397 fprintf(stderr
, "skip\n");
1398 isl_multi_pw_aff_dump(ext
->skip
[0]);
1399 isl_multi_pw_aff_dump(ext
->skip
[1]);
1403 /* Return 1 if the two pet_arrays are equivalent.
1405 * We don't compare element_size as this may be target dependent.
1407 int pet_array_is_equal(struct pet_array
*array1
, struct pet_array
*array2
)
1409 if (!array1
|| !array2
)
1412 if (!isl_set_is_equal(array1
->context
, array2
->context
))
1414 if (!isl_set_is_equal(array1
->extent
, array2
->extent
))
1416 if (!!array1
->value_bounds
!= !!array2
->value_bounds
)
1418 if (array1
->value_bounds
&&
1419 !isl_set_is_equal(array1
->value_bounds
, array2
->value_bounds
))
1421 if (strcmp(array1
->element_type
, array2
->element_type
))
1423 if (array1
->live_out
!= array2
->live_out
)
1425 if (array1
->uniquely_defined
!= array2
->uniquely_defined
)
1427 if (array1
->declared
!= array2
->declared
)
1429 if (array1
->exposed
!= array2
->exposed
)
1435 /* Return 1 if the two pet_stmts are equivalent.
1437 int pet_stmt_is_equal(struct pet_stmt
*stmt1
, struct pet_stmt
*stmt2
)
1441 if (!stmt1
|| !stmt2
)
1444 if (stmt1
->line
!= stmt2
->line
)
1446 if (!isl_set_is_equal(stmt1
->domain
, stmt2
->domain
))
1448 if (!isl_map_is_equal(stmt1
->schedule
, stmt2
->schedule
))
1450 if (!pet_expr_is_equal(stmt1
->body
, stmt2
->body
))
1452 if (stmt1
->n_arg
!= stmt2
->n_arg
)
1454 for (i
= 0; i
< stmt1
->n_arg
; ++i
) {
1455 if (!pet_expr_is_equal(stmt1
->args
[i
], stmt2
->args
[i
]))
1462 /* Return 1 if the two pet_implications are equivalent.
1464 int pet_implication_is_equal(struct pet_implication
*implication1
,
1465 struct pet_implication
*implication2
)
1467 if (!implication1
|| !implication2
)
1470 if (implication1
->satisfied
!= implication2
->satisfied
)
1472 if (!isl_map_is_equal(implication1
->extension
, implication2
->extension
))
1478 /* Return 1 if the two pet_scops are equivalent.
1480 int pet_scop_is_equal(struct pet_scop
*scop1
, struct pet_scop
*scop2
)
1484 if (!scop1
|| !scop2
)
1487 if (!isl_set_is_equal(scop1
->context
, scop2
->context
))
1489 if (!isl_set_is_equal(scop1
->context_value
, scop2
->context_value
))
1492 if (scop1
->n_array
!= scop2
->n_array
)
1494 for (i
= 0; i
< scop1
->n_array
; ++i
)
1495 if (!pet_array_is_equal(scop1
->arrays
[i
], scop2
->arrays
[i
]))
1498 if (scop1
->n_stmt
!= scop2
->n_stmt
)
1500 for (i
= 0; i
< scop1
->n_stmt
; ++i
)
1501 if (!pet_stmt_is_equal(scop1
->stmts
[i
], scop2
->stmts
[i
]))
1504 if (scop1
->n_implication
!= scop2
->n_implication
)
1506 for (i
= 0; i
< scop1
->n_implication
; ++i
)
1507 if (!pet_implication_is_equal(scop1
->implications
[i
],
1508 scop2
->implications
[i
]))
1514 /* Prefix the schedule of "stmt" with an extra dimension with constant
1517 struct pet_stmt
*pet_stmt_prefix(struct pet_stmt
*stmt
, int pos
)
1522 stmt
->schedule
= isl_map_insert_dims(stmt
->schedule
, isl_dim_out
, 0, 1);
1523 stmt
->schedule
= isl_map_fix_si(stmt
->schedule
, isl_dim_out
, 0, pos
);
1524 if (!stmt
->schedule
)
1525 return pet_stmt_free(stmt
);
1530 /* Prefix the schedules of all statements in "scop" with an extra
1531 * dimension with constant value "pos".
1533 struct pet_scop
*pet_scop_prefix(struct pet_scop
*scop
, int pos
)
1540 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
1541 scop
->stmts
[i
] = pet_stmt_prefix(scop
->stmts
[i
], pos
);
1542 if (!scop
->stmts
[i
])
1543 return pet_scop_free(scop
);
1549 /* Given a set with a parameter at "param_pos" that refers to the
1550 * iterator, "move" the iterator to the first set dimension.
1551 * That is, essentially equate the parameter to the first set dimension
1552 * and then project it out.
1554 * The first set dimension may however refer to a virtual iterator,
1555 * while the parameter refers to the "real" iterator.
1556 * We therefore need to take into account the affine expression "iv_map", which
1557 * expresses the real iterator in terms of the virtual iterator.
1558 * In particular, we equate the set dimension to the input of the map
1559 * and the parameter to the output of the map and then project out
1560 * everything we don't need anymore.
1562 static __isl_give isl_set
*internalize_iv(__isl_take isl_set
*set
,
1563 int param_pos
, __isl_take isl_aff
*iv_map
)
1565 isl_map
*map
, *map2
;
1566 map
= isl_map_from_domain(set
);
1567 map
= isl_map_add_dims(map
, isl_dim_out
, 1);
1568 map
= isl_map_equate(map
, isl_dim_in
, 0, isl_dim_out
, 0);
1569 map2
= isl_map_from_aff(iv_map
);
1570 map2
= isl_map_align_params(map2
, isl_map_get_space(map
));
1571 map
= isl_map_apply_range(map
, map2
);
1572 map
= isl_map_equate(map
, isl_dim_param
, param_pos
, isl_dim_out
, 0);
1573 map
= isl_map_project_out(map
, isl_dim_param
, param_pos
, 1);
1574 return isl_map_domain(map
);
1577 /* Data used in embed_access.
1578 * extend adds an iterator to the iteration domain
1579 * iv_map expresses the real iterator in terms of the virtual iterator
1580 * var_id represents the induction variable of the corresponding loop
1582 struct pet_embed_access
{
1588 /* Given an access expression, embed the associated access relation
1589 * in an extra outer loop.
1591 * We first update the iteration domain to insert the extra dimension.
1593 * If the access refers to the induction variable, then it is
1594 * turned into an access to the set of integers with index (and value)
1595 * equal to the induction variable.
1597 * If the induction variable appears in the constraints (as a parameter),
1598 * then the parameter is equated to the newly introduced iteration
1599 * domain dimension and subsequently projected out.
1601 * Similarly, if the accessed array is a virtual array (with user
1602 * pointer equal to NULL), as created by create_test_index,
1603 * then it is extended along with the domain of the access.
1605 static struct pet_expr
*embed_access(struct pet_expr
*expr
, void *user
)
1607 struct pet_embed_access
*data
= user
;
1609 isl_id
*array_id
= NULL
;
1612 expr
= update_domain(expr
, data
->extend
);
1616 access
= expr
->acc
.access
;
1618 if (isl_map_has_tuple_id(access
, isl_dim_out
))
1619 array_id
= isl_map_get_tuple_id(access
, isl_dim_out
);
1620 if (array_id
== data
->var_id
||
1621 (array_id
&& !isl_id_get_user(array_id
))) {
1622 access
= isl_map_insert_dims(access
, isl_dim_out
, 0, 1);
1623 access
= isl_map_equate(access
,
1624 isl_dim_in
, 0, isl_dim_out
, 0);
1625 if (array_id
== data
->var_id
)
1626 access
= isl_map_apply_range(access
,
1627 isl_map_from_aff(isl_aff_copy(data
->iv_map
)));
1629 access
= isl_map_set_tuple_id(access
, isl_dim_out
,
1630 isl_id_copy(array_id
));
1632 isl_id_free(array_id
);
1634 pos
= isl_map_find_dim_by_id(access
, isl_dim_param
, data
->var_id
);
1636 isl_set
*set
= isl_map_wrap(access
);
1637 set
= internalize_iv(set
, pos
, isl_aff_copy(data
->iv_map
));
1638 access
= isl_set_unwrap(set
);
1640 expr
->acc
.access
= isl_map_set_dim_id(access
, isl_dim_in
, 0,
1641 isl_id_copy(data
->var_id
));
1642 if (!expr
->acc
.access
)
1643 return pet_expr_free(expr
);
1648 /* Embed all access subexpressions of "expr" in an extra loop.
1649 * "extend" inserts an outer loop iterator in the iteration domains.
1650 * "iv_map" expresses the real iterator in terms of the virtual iterator
1651 * "var_id" represents the induction variable.
1653 static struct pet_expr
*expr_embed(struct pet_expr
*expr
,
1654 __isl_take isl_map
*extend
, __isl_take isl_aff
*iv_map
,
1655 __isl_keep isl_id
*var_id
)
1657 struct pet_embed_access data
=
1658 { .extend
= extend
, .iv_map
= iv_map
, .var_id
= var_id
};
1660 expr
= pet_expr_map_access(expr
, &embed_access
, &data
);
1661 isl_aff_free(iv_map
);
1662 isl_map_free(extend
);
1666 /* Embed the given pet_stmt in an extra outer loop with iteration domain
1667 * "dom" and schedule "sched". "var_id" represents the induction variable
1668 * of the loop. "iv_map" maps a possibly virtual iterator to the real iterator.
1669 * That is, it expresses the iterator that some of the parameters in "stmt"
1670 * may refer to in terms of the iterator used in "dom" and
1671 * the domain of "sched".
1673 * The iteration domain and schedule of the statement are updated
1674 * according to the iteration domain and schedule of the new loop.
1675 * If stmt->domain is a wrapped map, then the iteration domain
1676 * is the domain of this map, so we need to be careful to adjust
1679 * If the induction variable appears in the constraints (as a parameter)
1680 * of the current iteration domain or the schedule of the statement,
1681 * then the parameter is equated to the newly introduced iteration
1682 * domain dimension and subsequently projected out.
1684 * Finally, all access relations are updated based on the extra loop.
1686 static struct pet_stmt
*pet_stmt_embed(struct pet_stmt
*stmt
,
1687 __isl_take isl_set
*dom
, __isl_take isl_map
*sched
,
1688 __isl_take isl_aff
*iv_map
, __isl_take isl_id
*var_id
)
1699 if (isl_set_is_wrapping(stmt
->domain
)) {
1704 map
= isl_set_unwrap(stmt
->domain
);
1705 stmt_id
= isl_map_get_tuple_id(map
, isl_dim_in
);
1706 ran_dim
= isl_space_range(isl_map_get_space(map
));
1707 ext
= isl_map_from_domain_and_range(isl_set_copy(dom
),
1708 isl_set_universe(ran_dim
));
1709 map
= isl_map_flat_domain_product(ext
, map
);
1710 map
= isl_map_set_tuple_id(map
, isl_dim_in
,
1711 isl_id_copy(stmt_id
));
1712 dim
= isl_space_domain(isl_map_get_space(map
));
1713 stmt
->domain
= isl_map_wrap(map
);
1715 stmt_id
= isl_set_get_tuple_id(stmt
->domain
);
1716 stmt
->domain
= isl_set_flat_product(isl_set_copy(dom
),
1718 stmt
->domain
= isl_set_set_tuple_id(stmt
->domain
,
1719 isl_id_copy(stmt_id
));
1720 dim
= isl_set_get_space(stmt
->domain
);
1723 pos
= isl_set_find_dim_by_id(stmt
->domain
, isl_dim_param
, var_id
);
1725 stmt
->domain
= internalize_iv(stmt
->domain
, pos
,
1726 isl_aff_copy(iv_map
));
1728 stmt
->schedule
= isl_map_flat_product(sched
, stmt
->schedule
);
1729 stmt
->schedule
= isl_map_set_tuple_id(stmt
->schedule
,
1730 isl_dim_in
, stmt_id
);
1732 pos
= isl_map_find_dim_by_id(stmt
->schedule
, isl_dim_param
, var_id
);
1734 isl_set
*set
= isl_map_wrap(stmt
->schedule
);
1735 set
= internalize_iv(set
, pos
, isl_aff_copy(iv_map
));
1736 stmt
->schedule
= isl_set_unwrap(set
);
1739 dim
= isl_space_map_from_set(dim
);
1740 extend
= isl_map_identity(dim
);
1741 extend
= isl_map_remove_dims(extend
, isl_dim_in
, 0, 1);
1742 extend
= isl_map_set_tuple_id(extend
, isl_dim_in
,
1743 isl_map_get_tuple_id(extend
, isl_dim_out
));
1744 for (i
= 0; i
< stmt
->n_arg
; ++i
)
1745 stmt
->args
[i
] = expr_embed(stmt
->args
[i
], isl_map_copy(extend
),
1746 isl_aff_copy(iv_map
), var_id
);
1747 stmt
->body
= expr_embed(stmt
->body
, extend
, iv_map
, var_id
);
1750 isl_id_free(var_id
);
1752 for (i
= 0; i
< stmt
->n_arg
; ++i
)
1754 return pet_stmt_free(stmt
);
1755 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
1756 return pet_stmt_free(stmt
);
1760 isl_map_free(sched
);
1761 isl_aff_free(iv_map
);
1762 isl_id_free(var_id
);
1766 /* Embed the given pet_array in an extra outer loop with iteration domain
1768 * This embedding only has an effect on virtual arrays (those with
1769 * user pointer equal to NULL), which need to be extended along with
1770 * the iteration domain.
1772 static struct pet_array
*pet_array_embed(struct pet_array
*array
,
1773 __isl_take isl_set
*dom
)
1775 isl_id
*array_id
= NULL
;
1780 if (isl_set_has_tuple_id(array
->extent
))
1781 array_id
= isl_set_get_tuple_id(array
->extent
);
1783 if (array_id
&& !isl_id_get_user(array_id
)) {
1784 array
->extent
= isl_set_flat_product(dom
, array
->extent
);
1785 array
->extent
= isl_set_set_tuple_id(array
->extent
, array_id
);
1787 return pet_array_free(array
);
1790 isl_id_free(array_id
);
1799 /* Project out all unnamed parameters from "set" and return the result.
1801 static __isl_give isl_set
*set_project_out_unnamed_params(
1802 __isl_take isl_set
*set
)
1806 n
= isl_set_dim(set
, isl_dim_param
);
1807 for (i
= n
- 1; i
>= 0; --i
) {
1808 if (isl_set_has_dim_name(set
, isl_dim_param
, i
))
1810 set
= isl_set_project_out(set
, isl_dim_param
, i
, 1);
1816 /* Update the context with respect to an embedding into a loop
1817 * with iteration domain "dom" and induction variable "id".
1818 * "iv_map" expresses the real iterator (parameter "id") in terms
1819 * of a possibly virtual iterator (used in "dom").
1821 * If the current context is independent of "id", we don't need
1823 * Otherwise, a parameter value is invalid for the embedding if
1824 * any of the corresponding iterator values is invalid.
1825 * That is, a parameter value is valid only if all the corresponding
1826 * iterator values are valid.
1827 * We therefore compute the set of parameters
1829 * forall i in dom : valid (i)
1833 * not exists i in dom : not valid(i)
1837 * not exists i in dom \ valid(i)
1839 * Before we subtract valid(i) from dom, we first need to substitute
1840 * the real iterator for the virtual iterator.
1842 * If there are any unnamed parameters in "dom", then we consider
1843 * a parameter value to be valid if it is valid for any value of those
1844 * unnamed parameters. They are therefore projected out at the end.
1846 static __isl_give isl_set
*context_embed(__isl_take isl_set
*context
,
1847 __isl_keep isl_set
*dom
, __isl_keep isl_aff
*iv_map
,
1848 __isl_keep isl_id
*id
)
1853 pos
= isl_set_find_dim_by_id(context
, isl_dim_param
, id
);
1857 context
= isl_set_from_params(context
);
1858 context
= isl_set_add_dims(context
, isl_dim_set
, 1);
1859 context
= isl_set_equate(context
, isl_dim_param
, pos
, isl_dim_set
, 0);
1860 context
= isl_set_project_out(context
, isl_dim_param
, pos
, 1);
1861 ma
= isl_multi_aff_from_aff(isl_aff_copy(iv_map
));
1862 context
= isl_set_preimage_multi_aff(context
, ma
);
1863 context
= isl_set_subtract(isl_set_copy(dom
), context
);
1864 context
= isl_set_params(context
);
1865 context
= isl_set_complement(context
);
1866 context
= set_project_out_unnamed_params(context
);
1870 /* Update the implication with respect to an embedding into a loop
1871 * with iteration domain "dom".
1873 * Since embed_access extends virtual arrays along with the domain
1874 * of the access, we need to do the same with domain and range
1875 * of the implication. Since the original implication is only valid
1876 * within a given iteration of the loop, the extended implication
1877 * maps the extra array dimension corresponding to the extra loop
1880 static struct pet_implication
*pet_implication_embed(
1881 struct pet_implication
*implication
, __isl_take isl_set
*dom
)
1889 map
= isl_set_identity(dom
);
1890 id
= isl_map_get_tuple_id(implication
->extension
, isl_dim_in
);
1891 map
= isl_map_flat_product(map
, implication
->extension
);
1892 map
= isl_map_set_tuple_id(map
, isl_dim_in
, isl_id_copy(id
));
1893 map
= isl_map_set_tuple_id(map
, isl_dim_out
, id
);
1894 implication
->extension
= map
;
1895 if (!implication
->extension
)
1896 return pet_implication_free(implication
);
1904 /* Embed all statements and arrays in "scop" in an extra outer loop
1905 * with iteration domain "dom" and schedule "sched".
1906 * "id" represents the induction variable of the loop.
1907 * "iv_map" maps a possibly virtual iterator to the real iterator.
1908 * That is, it expresses the iterator that some of the parameters in "scop"
1909 * may refer to in terms of the iterator used in "dom" and
1910 * the domain of "sched".
1912 * Any skip conditions within the loop have no effect outside of the loop.
1913 * The caller is responsible for making sure skip[pet_skip_later] has been
1914 * taken into account.
1916 struct pet_scop
*pet_scop_embed(struct pet_scop
*scop
, __isl_take isl_set
*dom
,
1917 __isl_take isl_map
*sched
, __isl_take isl_aff
*iv_map
,
1918 __isl_take isl_id
*id
)
1925 pet_scop_reset_skip(scop
, pet_skip_now
);
1926 pet_scop_reset_skip(scop
, pet_skip_later
);
1928 scop
->context
= context_embed(scop
->context
, dom
, iv_map
, id
);
1932 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
1933 scop
->stmts
[i
] = pet_stmt_embed(scop
->stmts
[i
],
1934 isl_set_copy(dom
), isl_map_copy(sched
),
1935 isl_aff_copy(iv_map
), isl_id_copy(id
));
1936 if (!scop
->stmts
[i
])
1940 for (i
= 0; i
< scop
->n_array
; ++i
) {
1941 scop
->arrays
[i
] = pet_array_embed(scop
->arrays
[i
],
1943 if (!scop
->arrays
[i
])
1947 for (i
= 0; i
< scop
->n_implication
; ++i
) {
1948 scop
->implications
[i
] =
1949 pet_implication_embed(scop
->implications
[i
],
1951 if (!scop
->implications
[i
])
1956 isl_map_free(sched
);
1957 isl_aff_free(iv_map
);
1962 isl_map_free(sched
);
1963 isl_aff_free(iv_map
);
1965 return pet_scop_free(scop
);
1968 /* Add extra conditions on the parameters to iteration domain of "stmt".
1970 static struct pet_stmt
*stmt_restrict(struct pet_stmt
*stmt
,
1971 __isl_take isl_set
*cond
)
1976 stmt
->domain
= isl_set_intersect_params(stmt
->domain
, cond
);
1981 return pet_stmt_free(stmt
);
1984 /* Add extra conditions to scop->skip[type].
1986 * The new skip condition only holds if it held before
1987 * and the condition is true. It does not hold if it did not hold
1988 * before or the condition is false.
1990 * The skip condition is assumed to be an affine expression.
1992 static struct pet_scop
*pet_scop_restrict_skip(struct pet_scop
*scop
,
1993 enum pet_skip type
, __isl_keep isl_set
*cond
)
1995 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2001 if (!ext
->skip
[type
])
2004 if (!multi_pw_aff_is_affine(ext
->skip
[type
]))
2005 isl_die(isl_multi_pw_aff_get_ctx(ext
->skip
[type
]),
2006 isl_error_internal
, "can only resrict affine skips",
2007 return pet_scop_free(scop
));
2009 skip
= isl_multi_pw_aff_get_pw_aff(ext
->skip
[type
], 0);
2010 dom
= isl_pw_aff_domain(isl_pw_aff_copy(skip
));
2011 cond
= isl_set_copy(cond
);
2012 cond
= isl_set_from_params(cond
);
2013 cond
= isl_set_intersect(cond
, isl_pw_aff_non_zero_set(skip
));
2014 skip
= indicator_function(cond
, dom
);
2015 isl_multi_pw_aff_free(ext
->skip
[type
]);
2016 ext
->skip
[type
] = isl_multi_pw_aff_from_pw_aff(skip
);
2017 if (!ext
->skip
[type
])
2018 return pet_scop_free(scop
);
2023 /* Add extra conditions on the parameters to all iteration domains
2024 * and skip conditions.
2026 * A parameter value is valid for the result if it was valid
2027 * for the original scop and satisfies "cond" or if it does
2028 * not satisfy "cond" as in this case the scop is not executed
2029 * and the original constraints on the parameters are irrelevant.
2031 struct pet_scop
*pet_scop_restrict(struct pet_scop
*scop
,
2032 __isl_take isl_set
*cond
)
2036 scop
= pet_scop_restrict_skip(scop
, pet_skip_now
, cond
);
2037 scop
= pet_scop_restrict_skip(scop
, pet_skip_later
, cond
);
2042 scop
->context
= isl_set_intersect(scop
->context
, isl_set_copy(cond
));
2043 scop
->context
= isl_set_union(scop
->context
,
2044 isl_set_complement(isl_set_copy(cond
)));
2045 scop
->context
= isl_set_coalesce(scop
->context
);
2046 scop
->context
= set_project_out_unnamed_params(scop
->context
);
2050 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2051 scop
->stmts
[i
] = stmt_restrict(scop
->stmts
[i
],
2052 isl_set_copy(cond
));
2053 if (!scop
->stmts
[i
])
2061 return pet_scop_free(scop
);
2064 /* Construct a map that inserts a filter value with name "id" and value
2065 * "satisfied" in the list of filter values embedded in the set space "space".
2067 * If "space" does not contain any filter values yet, we first create
2068 * a map that inserts 0 filter values, i.e.,
2070 * space -> [space -> []]
2072 * We can now assume that space is of the form [dom -> [filters]]
2073 * We construct an identity mapping on dom and a mapping on filters
2074 * that inserts the new filter
2077 * [filters] -> [satisfied, filters]
2079 * and then compute the cross product
2081 * [dom -> [filters]] -> [dom -> [satisfied, filters]]
2083 static __isl_give isl_map
*insert_filter_map(__isl_take isl_space
*space
,
2084 __isl_take isl_id
*id
, int satisfied
)
2087 isl_map
*map
, *map_dom
, *map_ran
;
2090 if (isl_space_is_wrapping(space
)) {
2091 space2
= isl_space_map_from_set(isl_space_copy(space
));
2092 map
= isl_map_identity(space2
);
2093 space
= isl_space_unwrap(space
);
2095 space
= isl_space_from_domain(space
);
2096 map
= isl_map_universe(isl_space_copy(space
));
2097 map
= isl_map_reverse(isl_map_domain_map(map
));
2100 space2
= isl_space_domain(isl_space_copy(space
));
2101 map_dom
= isl_map_identity(isl_space_map_from_set(space2
));
2102 space
= isl_space_range(space
);
2103 map_ran
= isl_map_identity(isl_space_map_from_set(space
));
2104 map_ran
= isl_map_insert_dims(map_ran
, isl_dim_out
, 0, 1);
2105 map_ran
= isl_map_set_dim_id(map_ran
, isl_dim_out
, 0, id
);
2106 map_ran
= isl_map_fix_si(map_ran
, isl_dim_out
, 0, satisfied
);
2108 map
= isl_map_apply_range(map
, isl_map_product(map_dom
, map_ran
));
2113 /* Insert an argument expression corresponding to "test" in front
2114 * of the list of arguments described by *n_arg and *args.
2116 static int args_insert_access(unsigned *n_arg
, struct pet_expr
***args
,
2117 __isl_keep isl_map
*test
)
2120 isl_ctx
*ctx
= isl_map_get_ctx(test
);
2126 *args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
2130 struct pet_expr
**ext
;
2131 ext
= isl_calloc_array(ctx
, struct pet_expr
*, 1 + *n_arg
);
2134 for (i
= 0; i
< *n_arg
; ++i
)
2135 ext
[1 + i
] = (*args
)[i
];
2140 (*args
)[0] = pet_expr_from_access(isl_map_copy(test
));
2147 /* Make the expression "expr" depend on the value of "test"
2148 * being equal to "satisfied".
2150 * If "test" is an affine expression, we simply add the conditions
2151 * on the expression have the value "satisfied" to all access relations.
2153 * Otherwise, we add a filter to "expr" (which is then assumed to be
2154 * an access expression) corresponding to "test" being equal to "satisfied".
2156 struct pet_expr
*pet_expr_filter(struct pet_expr
*expr
,
2157 __isl_take isl_map
*test
, int satisfied
)
2167 if (!isl_map_has_tuple_id(test
, isl_dim_out
)) {
2168 test
= isl_map_fix_si(test
, isl_dim_out
, 0, satisfied
);
2169 return pet_expr_restrict(expr
, isl_map_params(test
));
2172 ctx
= isl_map_get_ctx(test
);
2173 if (expr
->type
!= pet_expr_access
)
2174 isl_die(ctx
, isl_error_invalid
,
2175 "can only filter access expressions", goto error
);
2177 space
= isl_space_domain(isl_map_get_space(expr
->acc
.access
));
2178 id
= isl_map_get_tuple_id(test
, isl_dim_out
);
2179 map
= insert_filter_map(space
, id
, satisfied
);
2181 expr
->acc
.access
= isl_map_apply_domain(expr
->acc
.access
, map
);
2182 if (!expr
->acc
.access
)
2185 if (args_insert_access(&expr
->n_arg
, &expr
->args
, test
) < 0)
2192 return pet_expr_free(expr
);
2195 /* Look through the applications in "scop" for any that can be
2196 * applied to the filter expressed by "map" and "satisified".
2197 * If there is any, then apply it to "map" and return the result.
2198 * Otherwise, return "map".
2199 * "id" is the identifier of the virtual array.
2201 * We only introduce at most one implication for any given virtual array,
2202 * so we can apply the implication and return as soon as we find one.
2204 static __isl_give isl_map
*apply_implications(struct pet_scop
*scop
,
2205 __isl_take isl_map
*map
, __isl_keep isl_id
*id
, int satisfied
)
2209 for (i
= 0; i
< scop
->n_implication
; ++i
) {
2210 struct pet_implication
*pi
= scop
->implications
[i
];
2213 if (pi
->satisfied
!= satisfied
)
2215 pi_id
= isl_map_get_tuple_id(pi
->extension
, isl_dim_in
);
2220 return isl_map_apply_range(map
, isl_map_copy(pi
->extension
));
2226 /* Is the filter expressed by "test" and "satisfied" implied
2227 * by filter "pos" on "domain", with filter "expr", taking into
2228 * account the implications of "scop"?
2230 * For filter on domain implying that expressed by "test" and "satisfied",
2231 * the filter needs to be an access to the same (virtual) array as "test" and
2232 * the filter value needs to be equal to "satisfied".
2233 * Moreover, the filter access relation, possibly extended by
2234 * the implications in "scop" needs to contain "test".
2236 static int implies_filter(struct pet_scop
*scop
,
2237 __isl_keep isl_map
*domain
, int pos
, struct pet_expr
*expr
,
2238 __isl_keep isl_map
*test
, int satisfied
)
2240 isl_id
*test_id
, *arg_id
;
2247 if (expr
->type
!= pet_expr_access
)
2249 test_id
= isl_map_get_tuple_id(test
, isl_dim_out
);
2250 arg_id
= pet_expr_access_get_id(expr
);
2251 isl_id_free(arg_id
);
2252 isl_id_free(test_id
);
2253 if (test_id
!= arg_id
)
2255 val
= isl_map_plain_get_val_if_fixed(domain
, isl_dim_out
, pos
);
2256 is_int
= isl_val_is_int(val
);
2258 s
= isl_val_get_num_si(val
);
2267 implied
= isl_map_copy(expr
->acc
.access
);
2268 implied
= apply_implications(scop
, implied
, test_id
, satisfied
);
2269 is_subset
= isl_map_is_subset(test
, implied
);
2270 isl_map_free(implied
);
2275 /* Is the filter expressed by "test" and "satisfied" implied
2276 * by any of the filters on the domain of "stmt", taking into
2277 * account the implications of "scop"?
2279 static int filter_implied(struct pet_scop
*scop
,
2280 struct pet_stmt
*stmt
, __isl_keep isl_map
*test
, int satisfied
)
2287 if (!scop
|| !stmt
|| !test
)
2289 if (scop
->n_implication
== 0)
2291 if (stmt
->n_arg
== 0)
2294 domain
= isl_set_unwrap(isl_set_copy(stmt
->domain
));
2297 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
2298 implied
= implies_filter(scop
, domain
, i
, stmt
->args
[i
],
2300 if (implied
< 0 || implied
)
2304 isl_map_free(domain
);
2308 /* Make the statement "stmt" depend on the value of "test"
2309 * being equal to "satisfied" by adjusting stmt->domain.
2311 * The domain of "test" corresponds to the (zero or more) outer dimensions
2312 * of the iteration domain.
2314 * We first extend "test" to apply to the entire iteration domain and
2315 * then check if the filter that we are about to add is implied
2316 * by any of the current filters, possibly taking into account
2317 * the implications in "scop". If so, we leave "stmt" untouched and return.
2319 * Otherwise, we insert an argument corresponding to a read to "test"
2320 * from the iteration domain of "stmt" in front of the list of arguments.
2321 * We also insert a corresponding output dimension in the wrapped
2322 * map contained in stmt->domain, with value set to "satisfied".
2324 static struct pet_stmt
*stmt_filter(struct pet_scop
*scop
,
2325 struct pet_stmt
*stmt
, __isl_take isl_map
*test
, int satisfied
)
2331 isl_map
*map
, *add_dom
;
2339 space
= isl_set_get_space(stmt
->domain
);
2340 if (isl_space_is_wrapping(space
))
2341 space
= isl_space_domain(isl_space_unwrap(space
));
2342 dom
= isl_set_universe(space
);
2343 n_test_dom
= isl_map_dim(test
, isl_dim_in
);
2344 add_dom
= isl_map_from_range(dom
);
2345 add_dom
= isl_map_add_dims(add_dom
, isl_dim_in
, n_test_dom
);
2346 for (i
= 0; i
< n_test_dom
; ++i
)
2347 add_dom
= isl_map_equate(add_dom
, isl_dim_in
, i
,
2349 test
= isl_map_apply_domain(test
, add_dom
);
2351 implied
= filter_implied(scop
, stmt
, test
, satisfied
);
2359 id
= isl_map_get_tuple_id(test
, isl_dim_out
);
2360 map
= insert_filter_map(isl_set_get_space(stmt
->domain
), id
, satisfied
);
2361 stmt
->domain
= isl_set_apply(stmt
->domain
, map
);
2363 if (args_insert_access(&stmt
->n_arg
, &stmt
->args
, test
) < 0)
2370 return pet_stmt_free(stmt
);
2373 /* Does "scop" have a skip condition of the given "type"?
2375 int pet_scop_has_skip(struct pet_scop
*scop
, enum pet_skip type
)
2377 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2381 return ext
->skip
[type
] != NULL
;
2384 /* Does "scop" have a skip condition of the given "type" that
2385 * is an affine expression?
2387 int pet_scop_has_affine_skip(struct pet_scop
*scop
, enum pet_skip type
)
2389 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2393 if (!ext
->skip
[type
])
2395 return multi_pw_aff_is_affine(ext
->skip
[type
]);
2398 /* Does "scop" have a skip condition of the given "type" that
2399 * is not an affine expression?
2401 int pet_scop_has_var_skip(struct pet_scop
*scop
, enum pet_skip type
)
2403 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2408 if (!ext
->skip
[type
])
2410 aff
= multi_pw_aff_is_affine(ext
->skip
[type
]);
2416 /* Does "scop" have a skip condition of the given "type" that
2417 * is affine and holds on the entire domain?
2419 int pet_scop_has_universal_skip(struct pet_scop
*scop
, enum pet_skip type
)
2421 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2427 is_aff
= pet_scop_has_affine_skip(scop
, type
);
2428 if (is_aff
< 0 || !is_aff
)
2431 pa
= isl_multi_pw_aff_get_pw_aff(ext
->skip
[type
], 0);
2432 set
= isl_pw_aff_non_zero_set(pa
);
2433 is_univ
= isl_set_plain_is_universe(set
);
2439 /* Replace scop->skip[type] by "skip".
2441 struct pet_scop
*pet_scop_set_skip(struct pet_scop
*scop
,
2442 enum pet_skip type
, __isl_take isl_multi_pw_aff
*skip
)
2444 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2449 isl_multi_pw_aff_free(ext
->skip
[type
]);
2450 ext
->skip
[type
] = skip
;
2454 isl_multi_pw_aff_free(skip
);
2455 return pet_scop_free(scop
);
2458 /* Return a copy of scop->skip[type].
2460 __isl_give isl_multi_pw_aff
*pet_scop_get_skip(struct pet_scop
*scop
,
2463 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2468 return isl_multi_pw_aff_copy(ext
->skip
[type
]);
2471 /* Assuming scop->skip[type] is an affine expression,
2472 * return the constraints on the parameters for which the skip condition
2475 __isl_give isl_set
*pet_scop_get_affine_skip_domain(struct pet_scop
*scop
,
2478 isl_multi_pw_aff
*skip
;
2481 skip
= pet_scop_get_skip(scop
, type
);
2482 pa
= isl_multi_pw_aff_get_pw_aff(skip
, 0);
2483 isl_multi_pw_aff_free(skip
);
2484 return isl_set_params(isl_pw_aff_non_zero_set(pa
));
2487 /* Return a map to the skip condition of the given type.
2489 __isl_give isl_map
*pet_scop_get_skip_map(struct pet_scop
*scop
,
2492 return isl_map_from_multi_pw_aff(pet_scop_get_skip(scop
, type
));
2495 /* Return the identifier of the variable that is accessed by
2496 * the skip condition of the given type.
2498 * The skip condition is assumed not to be an affine condition.
2500 __isl_give isl_id
*pet_scop_get_skip_id(struct pet_scop
*scop
,
2503 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2508 return isl_multi_pw_aff_get_tuple_id(ext
->skip
[type
], isl_dim_out
);
2511 /* Return an access pet_expr corresponding to the skip condition
2512 * of the given type.
2514 struct pet_expr
*pet_scop_get_skip_expr(struct pet_scop
*scop
,
2517 return pet_expr_from_access(pet_scop_get_skip_map(scop
, type
));
2520 /* Drop the the skip condition scop->skip[type].
2522 void pet_scop_reset_skip(struct pet_scop
*scop
, enum pet_skip type
)
2524 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2529 isl_multi_pw_aff_free(ext
->skip
[type
]);
2530 ext
->skip
[type
] = NULL
;
2533 /* Make the skip condition (if any) depend on the value of "test" being
2534 * equal to "satisfied".
2536 * We only support the case where the original skip condition is universal,
2537 * i.e., where skipping is unconditional, and where satisfied == 1.
2538 * In this case, the skip condition is changed to skip only when
2539 * "test" is equal to one.
2541 static struct pet_scop
*pet_scop_filter_skip(struct pet_scop
*scop
,
2542 enum pet_skip type
, __isl_keep isl_map
*test
, int satisfied
)
2548 if (!pet_scop_has_skip(scop
, type
))
2552 is_univ
= pet_scop_has_universal_skip(scop
, type
);
2554 return pet_scop_free(scop
);
2555 if (satisfied
&& is_univ
) {
2556 isl_space
*space
= isl_map_get_space(test
);
2557 isl_multi_pw_aff
*skip
;
2558 skip
= isl_multi_pw_aff_zero(space
);
2559 scop
= pet_scop_set_skip(scop
, type
, skip
);
2563 isl_die(isl_map_get_ctx(test
), isl_error_internal
,
2564 "skip expression cannot be filtered",
2565 return pet_scop_free(scop
));
2571 /* Make all statements in "scop" depend on the value of "test"
2572 * being equal to "satisfied" by adjusting their domains.
2574 struct pet_scop
*pet_scop_filter(struct pet_scop
*scop
,
2575 __isl_take isl_multi_pw_aff
*test
, int satisfied
)
2578 isl_map
*map
= isl_map_from_multi_pw_aff(test
);
2580 scop
= pet_scop_filter_skip(scop
, pet_skip_now
, map
, satisfied
);
2581 scop
= pet_scop_filter_skip(scop
, pet_skip_later
, map
, satisfied
);
2586 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2587 scop
->stmts
[i
] = stmt_filter(scop
, scop
->stmts
[i
],
2588 isl_map_copy(map
), satisfied
);
2589 if (!scop
->stmts
[i
])
2597 return pet_scop_free(scop
);
2600 /* Add all parameters in "expr" to "dim" and return the result.
2602 static __isl_give isl_space
*expr_collect_params(struct pet_expr
*expr
,
2603 __isl_take isl_space
*dim
)
2609 for (i
= 0; i
< expr
->n_arg
; ++i
)
2611 dim
= expr_collect_params(expr
->args
[i
], dim
);
2613 if (expr
->type
== pet_expr_access
)
2614 dim
= isl_space_align_params(dim
,
2615 isl_map_get_space(expr
->acc
.access
));
2619 isl_space_free(dim
);
2620 return pet_expr_free(expr
);
2623 /* Add all parameters in "stmt" to "dim" and return the result.
2625 static __isl_give isl_space
*stmt_collect_params(struct pet_stmt
*stmt
,
2626 __isl_take isl_space
*dim
)
2631 dim
= isl_space_align_params(dim
, isl_set_get_space(stmt
->domain
));
2632 dim
= isl_space_align_params(dim
, isl_map_get_space(stmt
->schedule
));
2633 dim
= expr_collect_params(stmt
->body
, dim
);
2637 isl_space_free(dim
);
2638 return pet_stmt_free(stmt
);
2641 /* Add all parameters in "array" to "dim" and return the result.
2643 static __isl_give isl_space
*array_collect_params(struct pet_array
*array
,
2644 __isl_take isl_space
*dim
)
2649 dim
= isl_space_align_params(dim
, isl_set_get_space(array
->context
));
2650 dim
= isl_space_align_params(dim
, isl_set_get_space(array
->extent
));
2654 pet_array_free(array
);
2655 return isl_space_free(dim
);
2658 /* Add all parameters in "scop" to "dim" and return the result.
2660 static __isl_give isl_space
*scop_collect_params(struct pet_scop
*scop
,
2661 __isl_take isl_space
*dim
)
2668 for (i
= 0; i
< scop
->n_array
; ++i
)
2669 dim
= array_collect_params(scop
->arrays
[i
], dim
);
2671 for (i
= 0; i
< scop
->n_stmt
; ++i
)
2672 dim
= stmt_collect_params(scop
->stmts
[i
], dim
);
2676 isl_space_free(dim
);
2677 return pet_scop_free(scop
);
2680 /* Add all parameters in "dim" to all access relations in "expr".
2682 static struct pet_expr
*expr_propagate_params(struct pet_expr
*expr
,
2683 __isl_take isl_space
*dim
)
2690 for (i
= 0; i
< expr
->n_arg
; ++i
) {
2692 expr_propagate_params(expr
->args
[i
],
2693 isl_space_copy(dim
));
2698 if (expr
->type
== pet_expr_access
) {
2699 expr
->acc
.access
= isl_map_align_params(expr
->acc
.access
,
2700 isl_space_copy(dim
));
2701 if (!expr
->acc
.access
)
2705 isl_space_free(dim
);
2708 isl_space_free(dim
);
2709 return pet_expr_free(expr
);
2712 /* Add all parameters in "dim" to the domain, schedule and
2713 * all access relations in "stmt".
2715 static struct pet_stmt
*stmt_propagate_params(struct pet_stmt
*stmt
,
2716 __isl_take isl_space
*dim
)
2721 stmt
->domain
= isl_set_align_params(stmt
->domain
, isl_space_copy(dim
));
2722 stmt
->schedule
= isl_map_align_params(stmt
->schedule
,
2723 isl_space_copy(dim
));
2724 stmt
->body
= expr_propagate_params(stmt
->body
, isl_space_copy(dim
));
2726 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
2729 isl_space_free(dim
);
2732 isl_space_free(dim
);
2733 return pet_stmt_free(stmt
);
2736 /* Add all parameters in "dim" to "array".
2738 static struct pet_array
*array_propagate_params(struct pet_array
*array
,
2739 __isl_take isl_space
*dim
)
2744 array
->context
= isl_set_align_params(array
->context
,
2745 isl_space_copy(dim
));
2746 array
->extent
= isl_set_align_params(array
->extent
,
2747 isl_space_copy(dim
));
2748 if (array
->value_bounds
) {
2749 array
->value_bounds
= isl_set_align_params(array
->value_bounds
,
2750 isl_space_copy(dim
));
2751 if (!array
->value_bounds
)
2755 if (!array
->context
|| !array
->extent
)
2758 isl_space_free(dim
);
2761 isl_space_free(dim
);
2762 return pet_array_free(array
);
2765 /* Add all parameters in "dim" to "scop".
2767 static struct pet_scop
*scop_propagate_params(struct pet_scop
*scop
,
2768 __isl_take isl_space
*dim
)
2775 for (i
= 0; i
< scop
->n_array
; ++i
) {
2776 scop
->arrays
[i
] = array_propagate_params(scop
->arrays
[i
],
2777 isl_space_copy(dim
));
2778 if (!scop
->arrays
[i
])
2782 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2783 scop
->stmts
[i
] = stmt_propagate_params(scop
->stmts
[i
],
2784 isl_space_copy(dim
));
2785 if (!scop
->stmts
[i
])
2789 isl_space_free(dim
);
2792 isl_space_free(dim
);
2793 return pet_scop_free(scop
);
2796 /* Update all isl_sets and isl_maps in "scop" such that they all
2797 * have the same parameters.
2799 struct pet_scop
*pet_scop_align_params(struct pet_scop
*scop
)
2806 dim
= isl_set_get_space(scop
->context
);
2807 dim
= scop_collect_params(scop
, dim
);
2809 scop
->context
= isl_set_align_params(scop
->context
, isl_space_copy(dim
));
2810 scop
= scop_propagate_params(scop
, dim
);
2815 /* Check if the given access relation accesses a (0D) array that corresponds
2816 * to one of the parameters in "dim". If so, replace the array access
2817 * by an access to the set of integers with as index (and value)
2820 static __isl_give isl_map
*access_detect_parameter(__isl_take isl_map
*access
,
2821 __isl_take isl_space
*dim
)
2823 isl_id
*array_id
= NULL
;
2826 if (isl_map_has_tuple_id(access
, isl_dim_out
)) {
2827 array_id
= isl_map_get_tuple_id(access
, isl_dim_out
);
2828 pos
= isl_space_find_dim_by_id(dim
, isl_dim_param
, array_id
);
2830 isl_space_free(dim
);
2833 isl_id_free(array_id
);
2837 pos
= isl_map_find_dim_by_id(access
, isl_dim_param
, array_id
);
2839 access
= isl_map_insert_dims(access
, isl_dim_param
, 0, 1);
2840 access
= isl_map_set_dim_id(access
, isl_dim_param
, 0, array_id
);
2843 isl_id_free(array_id
);
2845 access
= isl_map_insert_dims(access
, isl_dim_out
, 0, 1);
2846 access
= isl_map_equate(access
, isl_dim_param
, pos
, isl_dim_out
, 0);
2851 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2852 * in "dim" by a value equal to the corresponding parameter.
2854 static struct pet_expr
*expr_detect_parameter_accesses(struct pet_expr
*expr
,
2855 __isl_take isl_space
*dim
)
2862 for (i
= 0; i
< expr
->n_arg
; ++i
) {
2864 expr_detect_parameter_accesses(expr
->args
[i
],
2865 isl_space_copy(dim
));
2870 if (expr
->type
== pet_expr_access
) {
2871 expr
->acc
.access
= access_detect_parameter(expr
->acc
.access
,
2872 isl_space_copy(dim
));
2873 if (!expr
->acc
.access
)
2877 isl_space_free(dim
);
2880 isl_space_free(dim
);
2881 return pet_expr_free(expr
);
2884 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2885 * in "dim" by a value equal to the corresponding parameter.
2887 static struct pet_stmt
*stmt_detect_parameter_accesses(struct pet_stmt
*stmt
,
2888 __isl_take isl_space
*dim
)
2893 stmt
->body
= expr_detect_parameter_accesses(stmt
->body
,
2894 isl_space_copy(dim
));
2896 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
2899 isl_space_free(dim
);
2902 isl_space_free(dim
);
2903 return pet_stmt_free(stmt
);
2906 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2907 * in "dim" by a value equal to the corresponding parameter.
2909 static struct pet_scop
*scop_detect_parameter_accesses(struct pet_scop
*scop
,
2910 __isl_take isl_space
*dim
)
2917 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2918 scop
->stmts
[i
] = stmt_detect_parameter_accesses(scop
->stmts
[i
],
2919 isl_space_copy(dim
));
2920 if (!scop
->stmts
[i
])
2924 isl_space_free(dim
);
2927 isl_space_free(dim
);
2928 return pet_scop_free(scop
);
2931 /* Replace all accesses to (0D) arrays that correspond to any of
2932 * the parameters used in "scop" by a value equal
2933 * to the corresponding parameter.
2935 struct pet_scop
*pet_scop_detect_parameter_accesses(struct pet_scop
*scop
)
2942 dim
= isl_set_get_space(scop
->context
);
2943 dim
= scop_collect_params(scop
, dim
);
2945 scop
= scop_detect_parameter_accesses(scop
, dim
);
2950 /* Add all read access relations (if "read" is set) and/or all write
2951 * access relations (if "write" is set) to "accesses" and return the result.
2953 static __isl_give isl_union_map
*expr_collect_accesses(struct pet_expr
*expr
,
2954 int read
, int write
, __isl_take isl_union_map
*accesses
)
2963 for (i
= 0; i
< expr
->n_arg
; ++i
)
2964 accesses
= expr_collect_accesses(expr
->args
[i
],
2965 read
, write
, accesses
);
2967 if (expr
->type
== pet_expr_access
&& !pet_expr_is_affine(expr
) &&
2968 ((read
&& expr
->acc
.read
) || (write
&& expr
->acc
.write
)))
2969 accesses
= isl_union_map_add_map(accesses
,
2970 isl_map_copy(expr
->acc
.access
));
2975 /* Collect and return all read access relations (if "read" is set)
2976 * and/or all write access relations (if "write" is set) in "stmt".
2978 static __isl_give isl_union_map
*stmt_collect_accesses(struct pet_stmt
*stmt
,
2979 int read
, int write
, __isl_take isl_space
*dim
)
2981 isl_union_map
*accesses
;
2986 accesses
= isl_union_map_empty(dim
);
2987 accesses
= expr_collect_accesses(stmt
->body
, read
, write
, accesses
);
2988 accesses
= isl_union_map_intersect_domain(accesses
,
2989 isl_union_set_from_set(isl_set_copy(stmt
->domain
)));
2994 /* Collect and return all read access relations (if "read" is set)
2995 * and/or all write access relations (if "write" is set) in "scop".
2997 static __isl_give isl_union_map
*scop_collect_accesses(struct pet_scop
*scop
,
2998 int read
, int write
)
3001 isl_union_map
*accesses
;
3006 accesses
= isl_union_map_empty(isl_set_get_space(scop
->context
));
3008 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3009 isl_union_map
*accesses_i
;
3010 isl_space
*dim
= isl_set_get_space(scop
->context
);
3011 accesses_i
= stmt_collect_accesses(scop
->stmts
[i
],
3013 accesses
= isl_union_map_union(accesses
, accesses_i
);
3019 __isl_give isl_union_map
*pet_scop_collect_reads(struct pet_scop
*scop
)
3021 return scop_collect_accesses(scop
, 1, 0);
3024 __isl_give isl_union_map
*pet_scop_collect_writes(struct pet_scop
*scop
)
3026 return scop_collect_accesses(scop
, 0, 1);
3029 /* Collect and return the union of iteration domains in "scop".
3031 __isl_give isl_union_set
*pet_scop_collect_domains(struct pet_scop
*scop
)
3035 isl_union_set
*domain
;
3040 domain
= isl_union_set_empty(isl_set_get_space(scop
->context
));
3042 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3043 domain_i
= isl_set_copy(scop
->stmts
[i
]->domain
);
3044 domain
= isl_union_set_add_set(domain
, domain_i
);
3050 /* Collect and return the schedules of the statements in "scop".
3051 * The range is normalized to the maximal number of scheduling
3054 __isl_give isl_union_map
*pet_scop_collect_schedule(struct pet_scop
*scop
)
3057 isl_map
*schedule_i
;
3058 isl_union_map
*schedule
;
3059 int depth
, max_depth
= 0;
3064 schedule
= isl_union_map_empty(isl_set_get_space(scop
->context
));
3066 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3067 depth
= isl_map_dim(scop
->stmts
[i
]->schedule
, isl_dim_out
);
3068 if (depth
> max_depth
)
3072 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3073 schedule_i
= isl_map_copy(scop
->stmts
[i
]->schedule
);
3074 depth
= isl_map_dim(schedule_i
, isl_dim_out
);
3075 schedule_i
= isl_map_add_dims(schedule_i
, isl_dim_out
,
3077 for (j
= depth
; j
< max_depth
; ++j
)
3078 schedule_i
= isl_map_fix_si(schedule_i
,
3080 schedule
= isl_union_map_add_map(schedule
, schedule_i
);
3086 /* Does expression "expr" write to "id"?
3088 static int expr_writes(struct pet_expr
*expr
, __isl_keep isl_id
*id
)
3093 for (i
= 0; i
< expr
->n_arg
; ++i
) {
3094 int writes
= expr_writes(expr
->args
[i
], id
);
3095 if (writes
< 0 || writes
)
3099 if (expr
->type
!= pet_expr_access
)
3101 if (!expr
->acc
.write
)
3103 if (pet_expr_is_affine(expr
))
3106 write_id
= pet_expr_access_get_id(expr
);
3107 isl_id_free(write_id
);
3112 return write_id
== id
;
3115 /* Does statement "stmt" write to "id"?
3117 static int stmt_writes(struct pet_stmt
*stmt
, __isl_keep isl_id
*id
)
3119 return expr_writes(stmt
->body
, id
);
3122 /* Is there any write access in "scop" that accesses "id"?
3124 int pet_scop_writes(struct pet_scop
*scop
, __isl_keep isl_id
*id
)
3131 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3132 int writes
= stmt_writes(scop
->stmts
[i
], id
);
3133 if (writes
< 0 || writes
)
3140 /* Add a reference identifier to access expression "expr".
3141 * "user" points to an integer that contains the sequence number
3142 * of the next reference.
3144 static struct pet_expr
*access_add_ref_id(struct pet_expr
*expr
, void *user
)
3153 ctx
= isl_map_get_ctx(expr
->acc
.access
);
3154 snprintf(name
, sizeof(name
), "__pet_ref_%d", (*n_ref
)++);
3155 expr
->acc
.ref_id
= isl_id_alloc(ctx
, name
, NULL
);
3156 if (!expr
->acc
.ref_id
)
3157 return pet_expr_free(expr
);
3162 /* Add a reference identifier to all access expressions in "stmt".
3163 * "n_ref" points to an integer that contains the sequence number
3164 * of the next reference.
3166 static struct pet_stmt
*stmt_add_ref_ids(struct pet_stmt
*stmt
, int *n_ref
)
3173 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
3174 stmt
->args
[i
] = pet_expr_map_access(stmt
->args
[i
],
3175 &access_add_ref_id
, n_ref
);
3177 return pet_stmt_free(stmt
);
3180 stmt
->body
= pet_expr_map_access(stmt
->body
, &access_add_ref_id
, n_ref
);
3182 return pet_stmt_free(stmt
);
3187 /* Add a reference identifier to all access expressions in "scop".
3189 struct pet_scop
*pet_scop_add_ref_ids(struct pet_scop
*scop
)
3198 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3199 scop
->stmts
[i
] = stmt_add_ref_ids(scop
->stmts
[i
], &n_ref
);
3200 if (!scop
->stmts
[i
])
3201 return pet_scop_free(scop
);
3207 /* Reset the user pointer on the tuple id and all parameter ids in "set".
3209 static __isl_give isl_set
*set_anonymize(__isl_take isl_set
*set
)
3213 n
= isl_set_dim(set
, isl_dim_param
);
3214 for (i
= 0; i
< n
; ++i
) {
3215 isl_id
*id
= isl_set_get_dim_id(set
, isl_dim_param
, i
);
3216 const char *name
= isl_id_get_name(id
);
3217 set
= isl_set_set_dim_name(set
, isl_dim_param
, i
, name
);
3221 if (!isl_set_is_params(set
) && isl_set_has_tuple_id(set
)) {
3222 isl_id
*id
= isl_set_get_tuple_id(set
);
3223 const char *name
= isl_id_get_name(id
);
3224 set
= isl_set_set_tuple_name(set
, name
);
3231 /* Reset the user pointer on the tuple ids and all parameter ids in "map".
3233 static __isl_give isl_map
*map_anonymize(__isl_take isl_map
*map
)
3237 n
= isl_map_dim(map
, isl_dim_param
);
3238 for (i
= 0; i
< n
; ++i
) {
3239 isl_id
*id
= isl_map_get_dim_id(map
, isl_dim_param
, i
);
3240 const char *name
= isl_id_get_name(id
);
3241 map
= isl_map_set_dim_name(map
, isl_dim_param
, i
, name
);
3245 if (isl_map_has_tuple_id(map
, isl_dim_in
)) {
3246 isl_id
*id
= isl_map_get_tuple_id(map
, isl_dim_in
);
3247 const char *name
= isl_id_get_name(id
);
3248 map
= isl_map_set_tuple_name(map
, isl_dim_in
, name
);
3252 if (isl_map_has_tuple_id(map
, isl_dim_out
)) {
3253 isl_id
*id
= isl_map_get_tuple_id(map
, isl_dim_out
);
3254 const char *name
= isl_id_get_name(id
);
3255 map
= isl_map_set_tuple_name(map
, isl_dim_out
, name
);
3262 /* Reset the user pointer on all parameter ids in "array".
3264 static struct pet_array
*array_anonymize(struct pet_array
*array
)
3269 array
->context
= set_anonymize(array
->context
);
3270 array
->extent
= set_anonymize(array
->extent
);
3271 if (!array
->context
|| !array
->extent
)
3272 return pet_array_free(array
);
3277 /* Reset the user pointer on all parameter and tuple ids in
3278 * the access relation of the access expression "expr".
3280 static struct pet_expr
*access_anonymize(struct pet_expr
*expr
, void *user
)
3282 expr
->acc
.access
= map_anonymize(expr
->acc
.access
);
3283 if (!expr
->acc
.access
)
3284 return pet_expr_free(expr
);
3289 /* Reset the user pointer on all parameter and tuple ids in "stmt".
3291 static struct pet_stmt
*stmt_anonymize(struct pet_stmt
*stmt
)
3300 stmt
->domain
= set_anonymize(stmt
->domain
);
3301 stmt
->schedule
= map_anonymize(stmt
->schedule
);
3302 if (!stmt
->domain
|| !stmt
->schedule
)
3303 return pet_stmt_free(stmt
);
3305 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
3306 stmt
->args
[i
] = pet_expr_map_access(stmt
->args
[i
],
3307 &access_anonymize
, NULL
);
3309 return pet_stmt_free(stmt
);
3312 stmt
->body
= pet_expr_map_access(stmt
->body
,
3313 &access_anonymize
, NULL
);
3315 return pet_stmt_free(stmt
);
3320 /* Reset the user pointer on the tuple ids and all parameter ids
3323 static struct pet_implication
*implication_anonymize(
3324 struct pet_implication
*implication
)
3329 implication
->extension
= map_anonymize(implication
->extension
);
3330 if (!implication
->extension
)
3331 return pet_implication_free(implication
);
3336 /* Reset the user pointer on all parameter and tuple ids in "scop".
3338 struct pet_scop
*pet_scop_anonymize(struct pet_scop
*scop
)
3345 scop
->context
= set_anonymize(scop
->context
);
3346 scop
->context_value
= set_anonymize(scop
->context_value
);
3347 if (!scop
->context
|| !scop
->context_value
)
3348 return pet_scop_free(scop
);
3350 for (i
= 0; i
< scop
->n_array
; ++i
) {
3351 scop
->arrays
[i
] = array_anonymize(scop
->arrays
[i
]);
3352 if (!scop
->arrays
[i
])
3353 return pet_scop_free(scop
);
3356 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3357 scop
->stmts
[i
] = stmt_anonymize(scop
->stmts
[i
]);
3358 if (!scop
->stmts
[i
])
3359 return pet_scop_free(scop
);
3362 for (i
= 0; i
< scop
->n_implication
; ++i
) {
3363 scop
->implications
[i
] =
3364 implication_anonymize(scop
->implications
[i
]);
3365 if (!scop
->implications
[i
])
3366 return pet_scop_free(scop
);
3372 /* If "value_bounds" contains any bounds on the variable accessed by "arg",
3373 * then intersect the range of "map" with the valid set of values.
3375 static __isl_give isl_map
*access_apply_value_bounds(__isl_take isl_map
*map
,
3376 struct pet_expr
*arg
, __isl_keep isl_union_map
*value_bounds
)
3381 isl_ctx
*ctx
= isl_map_get_ctx(map
);
3383 id
= pet_expr_access_get_id(arg
);
3384 space
= isl_space_alloc(ctx
, 0, 0, 1);
3385 space
= isl_space_set_tuple_id(space
, isl_dim_in
, id
);
3386 vb
= isl_union_map_extract_map(value_bounds
, space
);
3387 if (!isl_map_plain_is_empty(vb
))
3388 map
= isl_map_intersect_range(map
, isl_map_range(vb
));
3395 /* Given a set "domain", return a wrapped relation with the given set
3396 * as domain and a range of dimension "n_arg", where each coordinate
3397 * is either unbounded or, if the corresponding element of args is of
3398 * type pet_expr_access, bounded by the bounds specified by "value_bounds".
3400 static __isl_give isl_set
*apply_value_bounds(__isl_take isl_set
*domain
,
3401 unsigned n_arg
, struct pet_expr
**args
,
3402 __isl_keep isl_union_map
*value_bounds
)
3408 map
= isl_map_from_domain(domain
);
3409 space
= isl_map_get_space(map
);
3410 space
= isl_space_add_dims(space
, isl_dim_out
, 1);
3412 for (i
= 0; i
< n_arg
; ++i
) {
3414 struct pet_expr
*arg
= args
[i
];
3416 map_i
= isl_map_universe(isl_space_copy(space
));
3417 if (arg
->type
== pet_expr_access
)
3418 map_i
= access_apply_value_bounds(map_i
, arg
,
3420 map
= isl_map_flat_range_product(map
, map_i
);
3422 isl_space_free(space
);
3424 return isl_map_wrap(map
);
3427 /* Data used in access_gist() callback.
3429 struct pet_access_gist_data
{
3431 isl_union_map
*value_bounds
;
3434 /* Given an expression "expr" of type pet_expr_access, compute
3435 * the gist of the associated access relation with respect to
3436 * data->domain and the bounds on the values of the arguments
3437 * of the expression.
3439 static struct pet_expr
*access_gist(struct pet_expr
*expr
, void *user
)
3441 struct pet_access_gist_data
*data
= user
;
3444 domain
= isl_set_copy(data
->domain
);
3445 if (expr
->n_arg
> 0)
3446 domain
= apply_value_bounds(domain
, expr
->n_arg
, expr
->args
,
3447 data
->value_bounds
);
3449 expr
->acc
.access
= isl_map_gist_domain(expr
->acc
.access
, domain
);
3450 if (!expr
->acc
.access
)
3451 return pet_expr_free(expr
);
3456 /* Compute the gist of the iteration domain and all access relations
3457 * of "stmt" based on the constraints on the parameters specified by "context"
3458 * and the constraints on the values of nested accesses specified
3459 * by "value_bounds".
3461 static struct pet_stmt
*stmt_gist(struct pet_stmt
*stmt
,
3462 __isl_keep isl_set
*context
, __isl_keep isl_union_map
*value_bounds
)
3467 struct pet_access_gist_data data
;
3472 data
.domain
= isl_set_copy(stmt
->domain
);
3473 data
.value_bounds
= value_bounds
;
3474 if (stmt
->n_arg
> 0)
3475 data
.domain
= isl_map_domain(isl_set_unwrap(data
.domain
));
3477 data
.domain
= isl_set_intersect_params(data
.domain
,
3478 isl_set_copy(context
));
3480 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
3481 stmt
->args
[i
] = pet_expr_map_access(stmt
->args
[i
],
3482 &access_gist
, &data
);
3487 stmt
->body
= pet_expr_map_access(stmt
->body
, &access_gist
, &data
);
3491 isl_set_free(data
.domain
);
3493 space
= isl_set_get_space(stmt
->domain
);
3494 if (isl_space_is_wrapping(space
))
3495 space
= isl_space_domain(isl_space_unwrap(space
));
3496 domain
= isl_set_universe(space
);
3497 domain
= isl_set_intersect_params(domain
, isl_set_copy(context
));
3498 if (stmt
->n_arg
> 0)
3499 domain
= apply_value_bounds(domain
, stmt
->n_arg
, stmt
->args
,
3501 stmt
->domain
= isl_set_gist(stmt
->domain
, domain
);
3503 return pet_stmt_free(stmt
);
3507 isl_set_free(data
.domain
);
3508 return pet_stmt_free(stmt
);
3511 /* Compute the gist of the extent of the array
3512 * based on the constraints on the parameters specified by "context".
3514 static struct pet_array
*array_gist(struct pet_array
*array
,
3515 __isl_keep isl_set
*context
)
3520 array
->extent
= isl_set_gist_params(array
->extent
,
3521 isl_set_copy(context
));
3523 return pet_array_free(array
);
3528 /* Compute the gist of all sets and relations in "scop"
3529 * based on the constraints on the parameters specified by "scop->context"
3530 * and the constraints on the values of nested accesses specified
3531 * by "value_bounds".
3533 struct pet_scop
*pet_scop_gist(struct pet_scop
*scop
,
3534 __isl_keep isl_union_map
*value_bounds
)
3541 scop
->context
= isl_set_coalesce(scop
->context
);
3543 return pet_scop_free(scop
);
3545 for (i
= 0; i
< scop
->n_array
; ++i
) {
3546 scop
->arrays
[i
] = array_gist(scop
->arrays
[i
], scop
->context
);
3547 if (!scop
->arrays
[i
])
3548 return pet_scop_free(scop
);
3551 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3552 scop
->stmts
[i
] = stmt_gist(scop
->stmts
[i
], scop
->context
,
3554 if (!scop
->stmts
[i
])
3555 return pet_scop_free(scop
);
3561 /* Intersect the context of "scop" with "context".
3562 * To ensure that we don't introduce any unnamed parameters in
3563 * the context of "scop", we first remove the unnamed parameters
3566 struct pet_scop
*pet_scop_restrict_context(struct pet_scop
*scop
,
3567 __isl_take isl_set
*context
)
3572 context
= set_project_out_unnamed_params(context
);
3573 scop
->context
= isl_set_intersect(scop
->context
, context
);
3575 return pet_scop_free(scop
);
3579 isl_set_free(context
);
3580 return pet_scop_free(scop
);
3583 /* Drop the current context of "scop". That is, replace the context
3584 * by a universal set.
3586 struct pet_scop
*pet_scop_reset_context(struct pet_scop
*scop
)
3593 space
= isl_set_get_space(scop
->context
);
3594 isl_set_free(scop
->context
);
3595 scop
->context
= isl_set_universe(space
);
3597 return pet_scop_free(scop
);
3602 /* Append "array" to the arrays of "scop".
3604 struct pet_scop
*pet_scop_add_array(struct pet_scop
*scop
,
3605 struct pet_array
*array
)
3608 struct pet_array
**arrays
;
3610 if (!array
|| !scop
)
3613 ctx
= isl_set_get_ctx(scop
->context
);
3614 arrays
= isl_realloc_array(ctx
, scop
->arrays
, struct pet_array
*,
3618 scop
->arrays
= arrays
;
3619 scop
->arrays
[scop
->n_array
] = array
;
3624 pet_array_free(array
);
3625 return pet_scop_free(scop
);
3628 /* Create and return an implication on filter values equal to "satisfied"
3629 * with extension "map".
3631 static struct pet_implication
*new_implication(__isl_take isl_map
*map
,
3635 struct pet_implication
*implication
;
3639 ctx
= isl_map_get_ctx(map
);
3640 implication
= isl_alloc_type(ctx
, struct pet_implication
);
3644 implication
->extension
= map
;
3645 implication
->satisfied
= satisfied
;
3653 /* Add an implication on filter values equal to "satisfied"
3654 * with extension "map" to "scop".
3656 struct pet_scop
*pet_scop_add_implication(struct pet_scop
*scop
,
3657 __isl_take isl_map
*map
, int satisfied
)
3660 struct pet_implication
*implication
;
3661 struct pet_implication
**implications
;
3663 implication
= new_implication(map
, satisfied
);
3664 if (!scop
|| !implication
)
3667 ctx
= isl_set_get_ctx(scop
->context
);
3668 implications
= isl_realloc_array(ctx
, scop
->implications
,
3669 struct pet_implication
*,
3670 scop
->n_implication
+ 1);
3673 scop
->implications
= implications
;
3674 scop
->implications
[scop
->n_implication
] = implication
;
3675 scop
->n_implication
++;
3679 pet_implication_free(implication
);
3680 return pet_scop_free(scop
);