2 * Copyright 2011 Leiden University. All rights reserved.
3 * Copyright 2012 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 either by a variable, which
85 * is assumed to attain values zero and one, or by a boolean affine
86 * expression. The condition holds if the variable has value one
87 * or if the affine expression has value one (typically for only
88 * part of the parameter space).
90 * A missing condition (skip[type] == NULL) means that we don't want
99 const char *pet_op_str(enum pet_op_type op
)
104 int pet_op_is_inc_dec(enum pet_op_type op
)
106 return op
== pet_op_post_inc
|| op
== pet_op_post_dec
||
107 op
== pet_op_pre_inc
|| op
== pet_op_pre_dec
;
110 const char *pet_type_str(enum pet_expr_type type
)
112 return type_str
[type
];
115 enum pet_op_type
pet_str_op(const char *str
)
119 for (i
= 0; i
< ARRAY_SIZE(op_str
); ++i
)
120 if (!strcmp(op_str
[i
], str
))
126 enum pet_expr_type
pet_str_type(const char *str
)
130 for (i
= 0; i
< ARRAY_SIZE(type_str
); ++i
)
131 if (!strcmp(type_str
[i
], str
))
137 /* Construct a pet_expr from an access relation.
138 * By default, it is considered to be a read access.
140 struct pet_expr
*pet_expr_from_access(__isl_take isl_map
*access
)
142 isl_ctx
*ctx
= isl_map_get_ctx(access
);
143 struct pet_expr
*expr
;
147 expr
= isl_calloc_type(ctx
, struct pet_expr
);
151 expr
->type
= pet_expr_access
;
152 expr
->acc
.access
= access
;
158 isl_map_free(access
);
162 /* Construct a pet_expr that kills the elements specified by "access".
164 struct pet_expr
*pet_expr_kill_from_access(__isl_take isl_map
*access
)
167 struct pet_expr
*expr
;
169 ctx
= isl_map_get_ctx(access
);
170 expr
= pet_expr_from_access(access
);
174 return pet_expr_new_unary(ctx
, pet_op_kill
, expr
);
177 /* Construct a unary pet_expr that performs "op" on "arg".
179 struct pet_expr
*pet_expr_new_unary(isl_ctx
*ctx
, enum pet_op_type op
,
180 struct pet_expr
*arg
)
182 struct pet_expr
*expr
;
186 expr
= isl_alloc_type(ctx
, struct pet_expr
);
190 expr
->type
= pet_expr_unary
;
193 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
196 expr
->args
[pet_un_arg
] = arg
;
204 /* Construct a binary pet_expr that performs "op" on "lhs" and "rhs".
206 struct pet_expr
*pet_expr_new_binary(isl_ctx
*ctx
, enum pet_op_type op
,
207 struct pet_expr
*lhs
, struct pet_expr
*rhs
)
209 struct pet_expr
*expr
;
213 expr
= isl_alloc_type(ctx
, struct pet_expr
);
217 expr
->type
= pet_expr_binary
;
220 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 2);
223 expr
->args
[pet_bin_lhs
] = lhs
;
224 expr
->args
[pet_bin_rhs
] = rhs
;
233 /* Construct a ternary pet_expr that performs "cond" ? "lhs" : "rhs".
235 struct pet_expr
*pet_expr_new_ternary(isl_ctx
*ctx
, struct pet_expr
*cond
,
236 struct pet_expr
*lhs
, struct pet_expr
*rhs
)
238 struct pet_expr
*expr
;
240 if (!cond
|| !lhs
|| !rhs
)
242 expr
= isl_alloc_type(ctx
, struct pet_expr
);
246 expr
->type
= pet_expr_ternary
;
248 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 3);
251 expr
->args
[pet_ter_cond
] = cond
;
252 expr
->args
[pet_ter_true
] = lhs
;
253 expr
->args
[pet_ter_false
] = rhs
;
263 /* Construct a call pet_expr that calls function "name" with "n_arg"
264 * arguments. The caller is responsible for filling in the arguments.
266 struct pet_expr
*pet_expr_new_call(isl_ctx
*ctx
, const char *name
,
269 struct pet_expr
*expr
;
271 expr
= isl_alloc_type(ctx
, struct pet_expr
);
275 expr
->type
= pet_expr_call
;
277 expr
->name
= strdup(name
);
278 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, n_arg
);
279 if (!expr
->name
|| !expr
->args
)
280 return pet_expr_free(expr
);
285 /* Construct a pet_expr that represents the cast of "arg" to "type_name".
287 struct pet_expr
*pet_expr_new_cast(isl_ctx
*ctx
, const char *type_name
,
288 struct pet_expr
*arg
)
290 struct pet_expr
*expr
;
295 expr
= isl_alloc_type(ctx
, struct pet_expr
);
299 expr
->type
= pet_expr_cast
;
301 expr
->type_name
= strdup(type_name
);
302 expr
->args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
303 if (!expr
->type_name
|| !expr
->args
)
315 /* Construct a pet_expr that represents the double "d".
317 struct pet_expr
*pet_expr_new_double(isl_ctx
*ctx
, double val
, const char *s
)
319 struct pet_expr
*expr
;
321 expr
= isl_calloc_type(ctx
, struct pet_expr
);
325 expr
->type
= pet_expr_double
;
327 expr
->d
.s
= strdup(s
);
329 return pet_expr_free(expr
);
334 void *pet_expr_free(struct pet_expr
*expr
)
341 for (i
= 0; i
< expr
->n_arg
; ++i
)
342 pet_expr_free(expr
->args
[i
]);
345 switch (expr
->type
) {
346 case pet_expr_access
:
347 isl_map_free(expr
->acc
.access
);
353 free(expr
->type_name
);
355 case pet_expr_double
:
359 case pet_expr_binary
:
360 case pet_expr_ternary
:
368 static void expr_dump(struct pet_expr
*expr
, int indent
)
375 fprintf(stderr
, "%*s", indent
, "");
377 switch (expr
->type
) {
378 case pet_expr_double
:
379 fprintf(stderr
, "%s\n", expr
->d
.s
);
381 case pet_expr_access
:
382 isl_map_dump(expr
->acc
.access
);
383 fprintf(stderr
, "%*sread: %d\n", indent
+ 2,
385 fprintf(stderr
, "%*swrite: %d\n", indent
+ 2,
386 "", expr
->acc
.write
);
387 for (i
= 0; i
< expr
->n_arg
; ++i
)
388 expr_dump(expr
->args
[i
], indent
+ 2);
391 fprintf(stderr
, "%s\n", op_str
[expr
->op
]);
392 expr_dump(expr
->args
[pet_un_arg
], indent
+ 2);
394 case pet_expr_binary
:
395 fprintf(stderr
, "%s\n", op_str
[expr
->op
]);
396 expr_dump(expr
->args
[pet_bin_lhs
], indent
+ 2);
397 expr_dump(expr
->args
[pet_bin_rhs
], indent
+ 2);
399 case pet_expr_ternary
:
400 fprintf(stderr
, "?:\n");
401 expr_dump(expr
->args
[pet_ter_cond
], indent
+ 2);
402 expr_dump(expr
->args
[pet_ter_true
], indent
+ 2);
403 expr_dump(expr
->args
[pet_ter_false
], indent
+ 2);
406 fprintf(stderr
, "%s/%d\n", expr
->name
, expr
->n_arg
);
407 for (i
= 0; i
< expr
->n_arg
; ++i
)
408 expr_dump(expr
->args
[i
], indent
+ 2);
411 fprintf(stderr
, "(%s)\n", expr
->type_name
);
412 for (i
= 0; i
< expr
->n_arg
; ++i
)
413 expr_dump(expr
->args
[i
], indent
+ 2);
418 void pet_expr_dump(struct pet_expr
*expr
)
423 /* Does "expr" represent an access to an unnamed space, i.e.,
424 * does it represent an affine expression?
426 int pet_expr_is_affine(struct pet_expr
*expr
)
432 if (expr
->type
!= pet_expr_access
)
435 has_id
= isl_map_has_tuple_id(expr
->acc
.access
, isl_dim_out
);
442 /* Return 1 if the two pet_exprs are equivalent.
444 int pet_expr_is_equal(struct pet_expr
*expr1
, struct pet_expr
*expr2
)
448 if (!expr1
|| !expr2
)
451 if (expr1
->type
!= expr2
->type
)
453 if (expr1
->n_arg
!= expr2
->n_arg
)
455 for (i
= 0; i
< expr1
->n_arg
; ++i
)
456 if (!pet_expr_is_equal(expr1
->args
[i
], expr2
->args
[i
]))
458 switch (expr1
->type
) {
459 case pet_expr_double
:
460 if (strcmp(expr1
->d
.s
, expr2
->d
.s
))
462 if (expr1
->d
.val
!= expr2
->d
.val
)
465 case pet_expr_access
:
466 if (expr1
->acc
.read
!= expr2
->acc
.read
)
468 if (expr1
->acc
.write
!= expr2
->acc
.write
)
470 if (!expr1
->acc
.access
|| !expr2
->acc
.access
)
472 if (!isl_map_is_equal(expr1
->acc
.access
, expr2
->acc
.access
))
476 case pet_expr_binary
:
477 case pet_expr_ternary
:
478 if (expr1
->op
!= expr2
->op
)
482 if (strcmp(expr1
->name
, expr2
->name
))
486 if (strcmp(expr1
->type_name
, expr2
->type_name
))
494 /* Add extra conditions on the parameters to all access relations in "expr".
496 struct pet_expr
*pet_expr_restrict(struct pet_expr
*expr
,
497 __isl_take isl_set
*cond
)
504 for (i
= 0; i
< expr
->n_arg
; ++i
) {
505 expr
->args
[i
] = pet_expr_restrict(expr
->args
[i
],
511 if (expr
->type
== pet_expr_access
) {
512 expr
->acc
.access
= isl_map_intersect_params(expr
->acc
.access
,
514 if (!expr
->acc
.access
)
522 return pet_expr_free(expr
);
525 /* Modify all access relations in "expr" by calling "fn" on them.
527 struct pet_expr
*pet_expr_foreach_access(struct pet_expr
*expr
,
528 __isl_give isl_map
*(*fn
)(__isl_take isl_map
*access
, void *user
),
536 for (i
= 0; i
< expr
->n_arg
; ++i
) {
537 expr
->args
[i
] = pet_expr_foreach_access(expr
->args
[i
], fn
, user
);
539 return pet_expr_free(expr
);
542 if (expr
->type
== pet_expr_access
) {
543 expr
->acc
.access
= fn(expr
->acc
.access
, user
);
544 if (!expr
->acc
.access
)
545 return pet_expr_free(expr
);
551 /* Modify all expressions of type pet_expr_access in "expr"
552 * by calling "fn" on them.
554 struct pet_expr
*pet_expr_foreach_access_expr(struct pet_expr
*expr
,
555 struct pet_expr
*(*fn
)(struct pet_expr
*expr
, void *user
),
563 for (i
= 0; i
< expr
->n_arg
; ++i
) {
564 expr
->args
[i
] = pet_expr_foreach_access_expr(expr
->args
[i
],
567 return pet_expr_free(expr
);
570 if (expr
->type
== pet_expr_access
)
571 expr
= fn(expr
, user
);
576 /* Modify the given access relation based on the given iteration space
578 * If the access has any arguments then the domain of the access relation
579 * is a wrapped mapping from the iteration space to the space of
580 * argument values. We only need to change the domain of this wrapped
581 * mapping, so we extend the input transformation with an identity mapping
582 * on the space of argument values.
584 static __isl_give isl_map
*update_domain(__isl_take isl_map
*access
,
587 isl_map
*update
= user
;
590 update
= isl_map_copy(update
);
592 dim
= isl_map_get_space(access
);
593 dim
= isl_space_domain(dim
);
594 if (!isl_space_is_wrapping(dim
))
598 dim
= isl_space_unwrap(dim
);
599 dim
= isl_space_range(dim
);
600 dim
= isl_space_map_from_set(dim
);
601 id
= isl_map_identity(dim
);
602 update
= isl_map_product(update
, id
);
605 return isl_map_apply_domain(access
, update
);
608 /* Modify all access relations in "expr" based on the given iteration space
611 static struct pet_expr
*expr_update_domain(struct pet_expr
*expr
,
612 __isl_take isl_map
*update
)
614 expr
= pet_expr_foreach_access(expr
, &update_domain
, update
);
615 isl_map_free(update
);
619 /* Construct a pet_stmt with given line number and statement
620 * number from a pet_expr.
621 * The initial iteration domain is the zero-dimensional universe.
622 * The name of the domain is given by "label" if it is non-NULL.
623 * Otherwise, the name is constructed as S_<id>.
624 * The domains of all access relations are modified to refer
625 * to the statement iteration domain.
627 struct pet_stmt
*pet_stmt_from_pet_expr(isl_ctx
*ctx
, int line
,
628 __isl_take isl_id
*label
, int id
, struct pet_expr
*expr
)
630 struct pet_stmt
*stmt
;
640 stmt
= isl_calloc_type(ctx
, struct pet_stmt
);
644 dim
= isl_space_set_alloc(ctx
, 0, 0);
646 dim
= isl_space_set_tuple_id(dim
, isl_dim_set
, label
);
648 snprintf(name
, sizeof(name
), "S_%d", id
);
649 dim
= isl_space_set_tuple_name(dim
, isl_dim_set
, name
);
651 dom
= isl_set_universe(isl_space_copy(dim
));
652 sched
= isl_map_from_domain(isl_set_copy(dom
));
654 dim
= isl_space_from_range(dim
);
655 add_name
= isl_map_universe(dim
);
656 expr
= expr_update_domain(expr
, add_name
);
660 stmt
->schedule
= sched
;
663 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
664 return pet_stmt_free(stmt
);
669 return pet_expr_free(expr
);
672 void *pet_stmt_free(struct pet_stmt
*stmt
)
679 isl_set_free(stmt
->domain
);
680 isl_map_free(stmt
->schedule
);
681 pet_expr_free(stmt
->body
);
683 for (i
= 0; i
< stmt
->n_arg
; ++i
)
684 pet_expr_free(stmt
->args
[i
]);
691 static void stmt_dump(struct pet_stmt
*stmt
, int indent
)
698 fprintf(stderr
, "%*s%d\n", indent
, "", stmt
->line
);
699 fprintf(stderr
, "%*s", indent
, "");
700 isl_set_dump(stmt
->domain
);
701 fprintf(stderr
, "%*s", indent
, "");
702 isl_map_dump(stmt
->schedule
);
703 expr_dump(stmt
->body
, indent
);
704 for (i
= 0; i
< stmt
->n_arg
; ++i
)
705 expr_dump(stmt
->args
[i
], indent
+ 2);
708 void pet_stmt_dump(struct pet_stmt
*stmt
)
713 struct pet_array
*pet_array_free(struct pet_array
*array
)
718 isl_set_free(array
->context
);
719 isl_set_free(array
->extent
);
720 isl_set_free(array
->value_bounds
);
721 free(array
->element_type
);
727 void pet_array_dump(struct pet_array
*array
)
732 isl_set_dump(array
->context
);
733 isl_set_dump(array
->extent
);
734 isl_set_dump(array
->value_bounds
);
735 fprintf(stderr
, "%s %s\n", array
->element_type
,
736 array
->live_out
? "live-out" : "");
739 /* Alloc a pet_scop structure, with extra room for information that
740 * is only used during parsing.
742 struct pet_scop
*pet_scop_alloc(isl_ctx
*ctx
)
744 return &isl_calloc_type(ctx
, struct pet_scop_ext
)->scop
;
747 /* Construct a pet_scop with room for n statements.
749 static struct pet_scop
*scop_alloc(isl_ctx
*ctx
, int n
)
752 struct pet_scop
*scop
;
754 scop
= pet_scop_alloc(ctx
);
758 space
= isl_space_params_alloc(ctx
, 0);
759 scop
->context
= isl_set_universe(isl_space_copy(space
));
760 scop
->context_value
= isl_set_universe(space
);
761 scop
->stmts
= isl_calloc_array(ctx
, struct pet_stmt
*, n
);
762 if (!scop
->context
|| !scop
->stmts
)
763 return pet_scop_free(scop
);
770 struct pet_scop
*pet_scop_empty(isl_ctx
*ctx
)
772 return scop_alloc(ctx
, 0);
775 /* Update "context" with respect to the valid parameter values for "access".
777 static __isl_give isl_set
*access_extract_context(__isl_keep isl_map
*access
,
778 __isl_take isl_set
*context
)
780 context
= isl_set_intersect(context
,
781 isl_map_params(isl_map_copy(access
)));
785 /* Update "context" with respect to the valid parameter values for "expr".
787 * If "expr" represents a ternary operator, then a parameter value
788 * needs to be valid for the condition and for at least one of the
789 * remaining two arguments.
790 * If the condition is an affine expression, then we can be a bit more specific.
791 * The parameter then has to be valid for the second argument for
792 * non-zero accesses and valid for the third argument for zero accesses.
794 static __isl_give isl_set
*expr_extract_context(struct pet_expr
*expr
,
795 __isl_take isl_set
*context
)
799 if (expr
->type
== pet_expr_ternary
) {
801 isl_set
*context1
, *context2
;
803 is_aff
= pet_expr_is_affine(expr
->args
[0]);
807 context
= expr_extract_context(expr
->args
[0], context
);
808 context1
= expr_extract_context(expr
->args
[1],
809 isl_set_copy(context
));
810 context2
= expr_extract_context(expr
->args
[2], context
);
816 access
= isl_map_copy(expr
->args
[0]->acc
.access
);
817 access
= isl_map_fix_si(access
, isl_dim_out
, 0, 0);
818 zero_set
= isl_map_params(access
);
819 context1
= isl_set_subtract(context1
,
820 isl_set_copy(zero_set
));
821 context2
= isl_set_intersect(context2
, zero_set
);
824 context
= isl_set_union(context1
, context2
);
825 context
= isl_set_coalesce(context
);
830 for (i
= 0; i
< expr
->n_arg
; ++i
)
831 context
= expr_extract_context(expr
->args
[i
], context
);
833 if (expr
->type
== pet_expr_access
)
834 context
= access_extract_context(expr
->acc
.access
, context
);
838 isl_set_free(context
);
842 /* Update "context" with respect to the valid parameter values for "stmt".
844 static __isl_give isl_set
*stmt_extract_context(struct pet_stmt
*stmt
,
845 __isl_take isl_set
*context
)
849 for (i
= 0; i
< stmt
->n_arg
; ++i
)
850 context
= expr_extract_context(stmt
->args
[i
], context
);
852 context
= expr_extract_context(stmt
->body
, context
);
857 /* Construct a pet_scop that contains the given pet_stmt.
859 struct pet_scop
*pet_scop_from_pet_stmt(isl_ctx
*ctx
, struct pet_stmt
*stmt
)
861 struct pet_scop
*scop
;
866 scop
= scop_alloc(ctx
, 1);
868 scop
->context
= stmt_extract_context(stmt
, scop
->context
);
872 scop
->stmts
[0] = stmt
;
881 /* Does "set" represent an element of an unnamed space, i.e.,
882 * does it represent an affine expression?
884 static int set_is_affine(__isl_keep isl_set
*set
)
888 has_id
= isl_set_has_tuple_id(set
);
895 /* Combine ext1->skip[type] and ext2->skip[type] into ext->skip[type].
896 * ext may be equal to either ext1 or ext2.
898 * The two skips that need to be combined are assumed to be affine expressions.
900 * We need to skip in ext if we need to skip in either ext1 or ext2.
901 * We don't need to skip in ext if we don't need to skip in both ext1 and ext2.
903 static struct pet_scop_ext
*combine_skips(struct pet_scop_ext
*ext
,
904 struct pet_scop_ext
*ext1
, struct pet_scop_ext
*ext2
,
907 isl_set
*set
, *skip1
, *skip2
;
911 if (!ext1
->skip
[type
] && !ext2
->skip
[type
])
913 if (!ext1
->skip
[type
]) {
916 ext
->skip
[type
] = ext2
->skip
[type
];
917 ext2
->skip
[type
] = NULL
;
920 if (!ext2
->skip
[type
]) {
923 ext
->skip
[type
] = ext1
->skip
[type
];
924 ext1
->skip
[type
] = NULL
;
928 if (!set_is_affine(ext1
->skip
[type
]) ||
929 !set_is_affine(ext2
->skip
[type
]))
930 isl_die(isl_set_get_ctx(ext1
->skip
[type
]), isl_error_internal
,
931 "can only combine affine skips",
932 return pet_scop_free(&ext
->scop
));
934 skip1
= isl_set_copy(ext1
->skip
[type
]);
935 skip2
= isl_set_copy(ext2
->skip
[type
]);
936 set
= isl_set_intersect(
937 isl_set_fix_si(isl_set_copy(skip1
), isl_dim_set
, 0, 0),
938 isl_set_fix_si(isl_set_copy(skip2
), isl_dim_set
, 0, 0));
939 set
= isl_set_union(set
, isl_set_fix_si(skip1
, isl_dim_set
, 0, 1));
940 set
= isl_set_union(set
, isl_set_fix_si(skip2
, isl_dim_set
, 0, 1));
941 set
= isl_set_coalesce(set
);
942 isl_set_free(ext1
->skip
[type
]);
943 ext1
->skip
[type
] = NULL
;
944 isl_set_free(ext2
->skip
[type
]);
945 ext2
->skip
[type
] = NULL
;
946 ext
->skip
[type
] = set
;
947 if (!ext
->skip
[type
])
948 return pet_scop_free(&ext
->scop
);
953 /* Combine scop1->skip[type] and scop2->skip[type] into scop->skip[type],
954 * where type takes on the values pet_skip_now and pet_skip_later.
955 * scop may be equal to either scop1 or scop2.
957 static struct pet_scop
*scop_combine_skips(struct pet_scop
*scop
,
958 struct pet_scop
*scop1
, struct pet_scop
*scop2
)
960 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
961 struct pet_scop_ext
*ext1
= (struct pet_scop_ext
*) scop1
;
962 struct pet_scop_ext
*ext2
= (struct pet_scop_ext
*) scop2
;
964 ext
= combine_skips(ext
, ext1
, ext2
, pet_skip_now
);
965 ext
= combine_skips(ext
, ext1
, ext2
, pet_skip_later
);
969 /* Update scop->start and scop->end to include the region from "start"
970 * to "end". In particular, if scop->end == 0, then "scop" does not
971 * have any offset information yet and we simply take the information
972 * from "start" and "end". Otherwise, we update the fields if the
973 * region from "start" to "end" is not already included.
975 struct pet_scop
*pet_scop_update_start_end(struct pet_scop
*scop
,
976 unsigned start
, unsigned end
)
980 if (scop
->end
== 0) {
984 if (start
< scop
->start
)
993 /* Combine the offset information of "scop1" and "scop2" into "scop".
995 static struct pet_scop
*scop_combine_start_end(struct pet_scop
*scop
,
996 struct pet_scop
*scop1
, struct pet_scop
*scop2
)
999 scop
= pet_scop_update_start_end(scop
,
1000 scop1
->start
, scop1
->end
);
1002 scop
= pet_scop_update_start_end(scop
,
1003 scop2
->start
, scop2
->end
);
1007 /* Construct a pet_scop that contains the offset information,
1008 * arrays, statements and skip information in "scop1" and "scop2".
1010 static struct pet_scop
*pet_scop_add(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1011 struct pet_scop
*scop2
)
1014 struct pet_scop
*scop
;
1016 if (!scop1
|| !scop2
)
1019 if (scop1
->n_stmt
== 0) {
1020 scop2
= scop_combine_skips(scop2
, scop1
, scop2
);
1021 pet_scop_free(scop1
);
1025 if (scop2
->n_stmt
== 0) {
1026 scop1
= scop_combine_skips(scop1
, scop1
, scop2
);
1027 pet_scop_free(scop2
);
1031 scop
= scop_alloc(ctx
, scop1
->n_stmt
+ scop2
->n_stmt
);
1035 scop
->arrays
= isl_calloc_array(ctx
, struct pet_array
*,
1036 scop1
->n_array
+ scop2
->n_array
);
1039 scop
->n_array
= scop1
->n_array
+ scop2
->n_array
;
1041 for (i
= 0; i
< scop1
->n_stmt
; ++i
) {
1042 scop
->stmts
[i
] = scop1
->stmts
[i
];
1043 scop1
->stmts
[i
] = NULL
;
1046 for (i
= 0; i
< scop2
->n_stmt
; ++i
) {
1047 scop
->stmts
[scop1
->n_stmt
+ i
] = scop2
->stmts
[i
];
1048 scop2
->stmts
[i
] = NULL
;
1051 for (i
= 0; i
< scop1
->n_array
; ++i
) {
1052 scop
->arrays
[i
] = scop1
->arrays
[i
];
1053 scop1
->arrays
[i
] = NULL
;
1056 for (i
= 0; i
< scop2
->n_array
; ++i
) {
1057 scop
->arrays
[scop1
->n_array
+ i
] = scop2
->arrays
[i
];
1058 scop2
->arrays
[i
] = NULL
;
1061 scop
= pet_scop_restrict_context(scop
, isl_set_copy(scop1
->context
));
1062 scop
= pet_scop_restrict_context(scop
, isl_set_copy(scop2
->context
));
1063 scop
= scop_combine_skips(scop
, scop1
, scop2
);
1064 scop
= scop_combine_start_end(scop
, scop1
, scop2
);
1066 pet_scop_free(scop1
);
1067 pet_scop_free(scop2
);
1070 pet_scop_free(scop1
);
1071 pet_scop_free(scop2
);
1075 /* Apply the skip condition "skip" to "scop".
1076 * That is, make sure "scop" is not executed when the condition holds.
1078 * If "skip" is an affine expression, we add the conditions under
1079 * which the expression is zero to the iteration domains.
1080 * Otherwise, we add a filter on the variable attaining the value zero.
1082 static struct pet_scop
*restrict_skip(struct pet_scop
*scop
,
1083 __isl_take isl_set
*skip
)
1091 is_aff
= set_is_affine(skip
);
1096 return pet_scop_filter(scop
, isl_map_from_range(skip
), 0);
1098 skip
= isl_set_fix_si(skip
, isl_dim_set
, 0, 0);
1099 scop
= pet_scop_restrict(scop
, isl_set_params(skip
));
1104 return pet_scop_free(scop
);
1107 /* Construct a pet_scop that contains the arrays, statements and
1108 * skip information in "scop1" and "scop2", where the two scops
1109 * are executed "in sequence". That is, breaks and continues
1110 * in scop1 have an effect on scop2.
1112 struct pet_scop
*pet_scop_add_seq(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1113 struct pet_scop
*scop2
)
1115 if (scop1
&& pet_scop_has_skip(scop1
, pet_skip_now
))
1116 scop2
= restrict_skip(scop2
,
1117 pet_scop_get_skip(scop1
, pet_skip_now
));
1118 return pet_scop_add(ctx
, scop1
, scop2
);
1121 /* Construct a pet_scop that contains the arrays, statements and
1122 * skip information in "scop1" and "scop2", where the two scops
1123 * are executed "in parallel". That is, any break or continue
1124 * in scop1 has no effect on scop2.
1126 struct pet_scop
*pet_scop_add_par(isl_ctx
*ctx
, struct pet_scop
*scop1
,
1127 struct pet_scop
*scop2
)
1129 return pet_scop_add(ctx
, scop1
, scop2
);
1132 void *pet_scop_free(struct pet_scop
*scop
)
1135 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1139 isl_set_free(scop
->context
);
1140 isl_set_free(scop
->context_value
);
1142 for (i
= 0; i
< scop
->n_array
; ++i
)
1143 pet_array_free(scop
->arrays
[i
]);
1146 for (i
= 0; i
< scop
->n_stmt
; ++i
)
1147 pet_stmt_free(scop
->stmts
[i
]);
1149 isl_set_free(ext
->skip
[pet_skip_now
]);
1150 isl_set_free(ext
->skip
[pet_skip_later
]);
1155 void pet_scop_dump(struct pet_scop
*scop
)
1158 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1163 isl_set_dump(scop
->context
);
1164 isl_set_dump(scop
->context_value
);
1165 for (i
= 0; i
< scop
->n_array
; ++i
)
1166 pet_array_dump(scop
->arrays
[i
]);
1167 for (i
= 0; i
< scop
->n_stmt
; ++i
)
1168 pet_stmt_dump(scop
->stmts
[i
]);
1171 fprintf(stderr
, "skip\n");
1172 isl_set_dump(ext
->skip
[0]);
1173 isl_set_dump(ext
->skip
[1]);
1177 /* Return 1 if the two pet_arrays are equivalent.
1179 * We don't compare element_size as this may be target dependent.
1181 int pet_array_is_equal(struct pet_array
*array1
, struct pet_array
*array2
)
1183 if (!array1
|| !array2
)
1186 if (!isl_set_is_equal(array1
->context
, array2
->context
))
1188 if (!isl_set_is_equal(array1
->extent
, array2
->extent
))
1190 if (!!array1
->value_bounds
!= !!array2
->value_bounds
)
1192 if (array1
->value_bounds
&&
1193 !isl_set_is_equal(array1
->value_bounds
, array2
->value_bounds
))
1195 if (strcmp(array1
->element_type
, array2
->element_type
))
1197 if (array1
->live_out
!= array2
->live_out
)
1199 if (array1
->uniquely_defined
!= array2
->uniquely_defined
)
1201 if (array1
->declared
!= array2
->declared
)
1203 if (array1
->exposed
!= array2
->exposed
)
1209 /* Return 1 if the two pet_stmts are equivalent.
1211 int pet_stmt_is_equal(struct pet_stmt
*stmt1
, struct pet_stmt
*stmt2
)
1215 if (!stmt1
|| !stmt2
)
1218 if (stmt1
->line
!= stmt2
->line
)
1220 if (!isl_set_is_equal(stmt1
->domain
, stmt2
->domain
))
1222 if (!isl_map_is_equal(stmt1
->schedule
, stmt2
->schedule
))
1224 if (!pet_expr_is_equal(stmt1
->body
, stmt2
->body
))
1226 if (stmt1
->n_arg
!= stmt2
->n_arg
)
1228 for (i
= 0; i
< stmt1
->n_arg
; ++i
) {
1229 if (!pet_expr_is_equal(stmt1
->args
[i
], stmt2
->args
[i
]))
1236 /* Return 1 if the two pet_scops are equivalent.
1238 int pet_scop_is_equal(struct pet_scop
*scop1
, struct pet_scop
*scop2
)
1242 if (!scop1
|| !scop2
)
1245 if (!isl_set_is_equal(scop1
->context
, scop2
->context
))
1247 if (!isl_set_is_equal(scop1
->context_value
, scop2
->context_value
))
1250 if (scop1
->n_array
!= scop2
->n_array
)
1252 for (i
= 0; i
< scop1
->n_array
; ++i
)
1253 if (!pet_array_is_equal(scop1
->arrays
[i
], scop2
->arrays
[i
]))
1256 if (scop1
->n_stmt
!= scop2
->n_stmt
)
1258 for (i
= 0; i
< scop1
->n_stmt
; ++i
)
1259 if (!pet_stmt_is_equal(scop1
->stmts
[i
], scop2
->stmts
[i
]))
1265 /* Prefix the schedule of "stmt" with an extra dimension with constant
1268 struct pet_stmt
*pet_stmt_prefix(struct pet_stmt
*stmt
, int pos
)
1273 stmt
->schedule
= isl_map_insert_dims(stmt
->schedule
, isl_dim_out
, 0, 1);
1274 stmt
->schedule
= isl_map_fix_si(stmt
->schedule
, isl_dim_out
, 0, pos
);
1275 if (!stmt
->schedule
)
1276 return pet_stmt_free(stmt
);
1281 /* Prefix the schedules of all statements in "scop" with an extra
1282 * dimension with constant value "pos".
1284 struct pet_scop
*pet_scop_prefix(struct pet_scop
*scop
, int pos
)
1291 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
1292 scop
->stmts
[i
] = pet_stmt_prefix(scop
->stmts
[i
], pos
);
1293 if (!scop
->stmts
[i
])
1294 return pet_scop_free(scop
);
1300 /* Given a set with a parameter at "param_pos" that refers to the
1301 * iterator, "move" the iterator to the first set dimension.
1302 * That is, essentially equate the parameter to the first set dimension
1303 * and then project it out.
1305 * The first set dimension may however refer to a virtual iterator,
1306 * while the parameter refers to the "real" iterator.
1307 * We therefore need to take into account the mapping "iv_map", which
1308 * maps the virtual iterator to the real iterator.
1309 * In particular, we equate the set dimension to the input of the map
1310 * and the parameter to the output of the map and then project out
1311 * everything we don't need anymore.
1313 static __isl_give isl_set
*internalize_iv(__isl_take isl_set
*set
,
1314 int param_pos
, __isl_take isl_map
*iv_map
)
1317 map
= isl_map_from_domain(set
);
1318 map
= isl_map_add_dims(map
, isl_dim_out
, 1);
1319 map
= isl_map_equate(map
, isl_dim_in
, 0, isl_dim_out
, 0);
1320 iv_map
= isl_map_align_params(iv_map
, isl_map_get_space(map
));
1321 map
= isl_map_apply_range(map
, iv_map
);
1322 map
= isl_map_equate(map
, isl_dim_param
, param_pos
, isl_dim_out
, 0);
1323 map
= isl_map_project_out(map
, isl_dim_param
, param_pos
, 1);
1324 return isl_map_domain(map
);
1327 /* Data used in embed_access.
1328 * extend adds an iterator to the iteration domain
1329 * iv_map maps the virtual iterator to the real iterator
1330 * var_id represents the induction variable of the corresponding loop
1332 struct pet_embed_access
{
1338 /* Embed the access relation in an extra outer loop.
1340 * We first update the iteration domain to insert the extra dimension.
1342 * If the access refers to the induction variable, then it is
1343 * turned into an access to the set of integers with index (and value)
1344 * equal to the induction variable.
1346 * If the induction variable appears in the constraints (as a parameter),
1347 * then the parameter is equated to the newly introduced iteration
1348 * domain dimension and subsequently projected out.
1350 * Similarly, if the accessed array is a virtual array (with user
1351 * pointer equal to NULL), as created by create_test_access,
1352 * then it is extended along with the domain of the access.
1354 static __isl_give isl_map
*embed_access(__isl_take isl_map
*access
,
1357 struct pet_embed_access
*data
= user
;
1358 isl_id
*array_id
= NULL
;
1361 access
= update_domain(access
, data
->extend
);
1363 if (isl_map_has_tuple_id(access
, isl_dim_out
))
1364 array_id
= isl_map_get_tuple_id(access
, isl_dim_out
);
1365 if (array_id
== data
->var_id
||
1366 (array_id
&& !isl_id_get_user(array_id
))) {
1367 access
= isl_map_insert_dims(access
, isl_dim_out
, 0, 1);
1368 access
= isl_map_equate(access
,
1369 isl_dim_in
, 0, isl_dim_out
, 0);
1370 if (array_id
== data
->var_id
)
1371 access
= isl_map_apply_range(access
,
1372 isl_map_copy(data
->iv_map
));
1374 access
= isl_map_set_tuple_id(access
, isl_dim_out
,
1375 isl_id_copy(array_id
));
1377 isl_id_free(array_id
);
1379 pos
= isl_map_find_dim_by_id(access
, isl_dim_param
, data
->var_id
);
1381 isl_set
*set
= isl_map_wrap(access
);
1382 set
= internalize_iv(set
, pos
, isl_map_copy(data
->iv_map
));
1383 access
= isl_set_unwrap(set
);
1385 access
= isl_map_set_dim_id(access
, isl_dim_in
, 0,
1386 isl_id_copy(data
->var_id
));
1391 /* Embed all access relations in "expr" in an extra loop.
1392 * "extend" inserts an outer loop iterator in the iteration domains.
1393 * "iv_map" maps the virtual iterator to the real iterator
1394 * "var_id" represents the induction variable.
1396 static struct pet_expr
*expr_embed(struct pet_expr
*expr
,
1397 __isl_take isl_map
*extend
, __isl_take isl_map
*iv_map
,
1398 __isl_keep isl_id
*var_id
)
1400 struct pet_embed_access data
=
1401 { .extend
= extend
, .iv_map
= iv_map
, .var_id
= var_id
};
1403 expr
= pet_expr_foreach_access(expr
, &embed_access
, &data
);
1404 isl_map_free(iv_map
);
1405 isl_map_free(extend
);
1409 /* Embed the given pet_stmt in an extra outer loop with iteration domain
1410 * "dom" and schedule "sched". "var_id" represents the induction variable
1411 * of the loop. "iv_map" maps a possibly virtual iterator to the real iterator.
1412 * That is, it maps the iterator used in "dom" and the domain of "sched"
1413 * to the iterator that some of the parameters in "stmt" may refer to.
1415 * The iteration domain and schedule of the statement are updated
1416 * according to the iteration domain and schedule of the new loop.
1417 * If stmt->domain is a wrapped map, then the iteration domain
1418 * is the domain of this map, so we need to be careful to adjust
1421 * If the induction variable appears in the constraints (as a parameter)
1422 * of the current iteration domain or the schedule of the statement,
1423 * then the parameter is equated to the newly introduced iteration
1424 * domain dimension and subsequently projected out.
1426 * Finally, all access relations are updated based on the extra loop.
1428 static struct pet_stmt
*pet_stmt_embed(struct pet_stmt
*stmt
,
1429 __isl_take isl_set
*dom
, __isl_take isl_map
*sched
,
1430 __isl_take isl_map
*iv_map
, __isl_take isl_id
*var_id
)
1441 if (isl_set_is_wrapping(stmt
->domain
)) {
1446 map
= isl_set_unwrap(stmt
->domain
);
1447 stmt_id
= isl_map_get_tuple_id(map
, isl_dim_in
);
1448 ran_dim
= isl_space_range(isl_map_get_space(map
));
1449 ext
= isl_map_from_domain_and_range(isl_set_copy(dom
),
1450 isl_set_universe(ran_dim
));
1451 map
= isl_map_flat_domain_product(ext
, map
);
1452 map
= isl_map_set_tuple_id(map
, isl_dim_in
,
1453 isl_id_copy(stmt_id
));
1454 dim
= isl_space_domain(isl_map_get_space(map
));
1455 stmt
->domain
= isl_map_wrap(map
);
1457 stmt_id
= isl_set_get_tuple_id(stmt
->domain
);
1458 stmt
->domain
= isl_set_flat_product(isl_set_copy(dom
),
1460 stmt
->domain
= isl_set_set_tuple_id(stmt
->domain
,
1461 isl_id_copy(stmt_id
));
1462 dim
= isl_set_get_space(stmt
->domain
);
1465 pos
= isl_set_find_dim_by_id(stmt
->domain
, isl_dim_param
, var_id
);
1467 stmt
->domain
= internalize_iv(stmt
->domain
, pos
,
1468 isl_map_copy(iv_map
));
1470 stmt
->schedule
= isl_map_flat_product(sched
, stmt
->schedule
);
1471 stmt
->schedule
= isl_map_set_tuple_id(stmt
->schedule
,
1472 isl_dim_in
, stmt_id
);
1474 pos
= isl_map_find_dim_by_id(stmt
->schedule
, isl_dim_param
, var_id
);
1476 isl_set
*set
= isl_map_wrap(stmt
->schedule
);
1477 set
= internalize_iv(set
, pos
, isl_map_copy(iv_map
));
1478 stmt
->schedule
= isl_set_unwrap(set
);
1481 dim
= isl_space_map_from_set(dim
);
1482 extend
= isl_map_identity(dim
);
1483 extend
= isl_map_remove_dims(extend
, isl_dim_in
, 0, 1);
1484 extend
= isl_map_set_tuple_id(extend
, isl_dim_in
,
1485 isl_map_get_tuple_id(extend
, isl_dim_out
));
1486 for (i
= 0; i
< stmt
->n_arg
; ++i
)
1487 stmt
->args
[i
] = expr_embed(stmt
->args
[i
], isl_map_copy(extend
),
1488 isl_map_copy(iv_map
), var_id
);
1489 stmt
->body
= expr_embed(stmt
->body
, extend
, iv_map
, var_id
);
1492 isl_id_free(var_id
);
1494 for (i
= 0; i
< stmt
->n_arg
; ++i
)
1496 return pet_stmt_free(stmt
);
1497 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
1498 return pet_stmt_free(stmt
);
1502 isl_map_free(sched
);
1503 isl_map_free(iv_map
);
1504 isl_id_free(var_id
);
1508 /* Embed the given pet_array in an extra outer loop with iteration domain
1510 * This embedding only has an effect on virtual arrays (those with
1511 * user pointer equal to NULL), which need to be extended along with
1512 * the iteration domain.
1514 static struct pet_array
*pet_array_embed(struct pet_array
*array
,
1515 __isl_take isl_set
*dom
)
1517 isl_id
*array_id
= NULL
;
1522 if (isl_set_has_tuple_id(array
->extent
))
1523 array_id
= isl_set_get_tuple_id(array
->extent
);
1525 if (array_id
&& !isl_id_get_user(array_id
)) {
1526 array
->extent
= isl_set_flat_product(dom
, array
->extent
);
1527 array
->extent
= isl_set_set_tuple_id(array
->extent
, array_id
);
1530 isl_id_free(array_id
);
1539 /* Project out all unnamed parameters from "set" and return the result.
1541 static __isl_give isl_set
*set_project_out_unnamed_params(
1542 __isl_take isl_set
*set
)
1546 n
= isl_set_dim(set
, isl_dim_param
);
1547 for (i
= n
- 1; i
>= 0; --i
) {
1548 if (isl_set_has_dim_name(set
, isl_dim_param
, i
))
1550 set
= isl_set_project_out(set
, isl_dim_param
, i
, 1);
1556 /* Update the context with respect to an embedding into a loop
1557 * with iteration domain "dom" and induction variable "id".
1558 * "iv_map" maps a possibly virtual iterator (used in "dom")
1559 * to the real iterator (parameter "id").
1561 * If the current context is independent of "id", we don't need
1563 * Otherwise, a parameter value is invalid for the embedding if
1564 * any of the corresponding iterator values is invalid.
1565 * That is, a parameter value is valid only if all the corresponding
1566 * iterator values are valid.
1567 * We therefore compute the set of parameters
1569 * forall i in dom : valid (i)
1573 * not exists i in dom : not valid(i)
1577 * not exists i in dom \ valid(i)
1579 * Before we subtract valid(i) from dom, we first need to map
1580 * the real iterator to the virtual iterator.
1582 * If there are any unnamed parameters in "dom", then we consider
1583 * a parameter value to be valid if it is valid for any value of those
1584 * unnamed parameters. They are therefore projected out at the end.
1586 static __isl_give isl_set
*context_embed(__isl_take isl_set
*context
,
1587 __isl_keep isl_set
*dom
, __isl_keep isl_map
*iv_map
,
1588 __isl_keep isl_id
*id
)
1592 pos
= isl_set_find_dim_by_id(context
, isl_dim_param
, id
);
1596 context
= isl_set_from_params(context
);
1597 context
= isl_set_add_dims(context
, isl_dim_set
, 1);
1598 context
= isl_set_equate(context
, isl_dim_param
, pos
, isl_dim_set
, 0);
1599 context
= isl_set_project_out(context
, isl_dim_param
, pos
, 1);
1600 context
= isl_set_apply(context
, isl_map_reverse(isl_map_copy(iv_map
)));
1601 context
= isl_set_subtract(isl_set_copy(dom
), context
);
1602 context
= isl_set_params(context
);
1603 context
= isl_set_complement(context
);
1604 context
= set_project_out_unnamed_params(context
);
1608 /* Embed all statements and arrays in "scop" in an extra outer loop
1609 * with iteration domain "dom" and schedule "sched".
1610 * "id" represents the induction variable of the loop.
1611 * "iv_map" maps a possibly virtual iterator to the real iterator.
1612 * That is, it maps the iterator used in "dom" and the domain of "sched"
1613 * to the iterator that some of the parameters in "scop" may refer to.
1615 * Any skip conditions within the loop have no effect outside of the loop.
1616 * The caller is responsible for making sure skip[pet_skip_later] has been
1617 * taken into account.
1619 struct pet_scop
*pet_scop_embed(struct pet_scop
*scop
, __isl_take isl_set
*dom
,
1620 __isl_take isl_map
*sched
, __isl_take isl_map
*iv_map
,
1621 __isl_take isl_id
*id
)
1628 pet_scop_reset_skip(scop
, pet_skip_now
);
1629 pet_scop_reset_skip(scop
, pet_skip_later
);
1631 scop
->context
= context_embed(scop
->context
, dom
, iv_map
, id
);
1635 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
1636 scop
->stmts
[i
] = pet_stmt_embed(scop
->stmts
[i
],
1637 isl_set_copy(dom
), isl_map_copy(sched
),
1638 isl_map_copy(iv_map
), isl_id_copy(id
));
1639 if (!scop
->stmts
[i
])
1643 for (i
= 0; i
< scop
->n_array
; ++i
) {
1644 scop
->arrays
[i
] = pet_array_embed(scop
->arrays
[i
],
1646 if (!scop
->arrays
[i
])
1651 isl_map_free(sched
);
1652 isl_map_free(iv_map
);
1657 isl_map_free(sched
);
1658 isl_map_free(iv_map
);
1660 return pet_scop_free(scop
);
1663 /* Add extra conditions on the parameters to iteration domain of "stmt".
1665 static struct pet_stmt
*stmt_restrict(struct pet_stmt
*stmt
,
1666 __isl_take isl_set
*cond
)
1671 stmt
->domain
= isl_set_intersect_params(stmt
->domain
, cond
);
1676 return pet_stmt_free(stmt
);
1679 /* Add extra conditions to scop->skip[type].
1681 * The new skip condition only holds if it held before
1682 * and the condition is true. It does not hold if it did not hold
1683 * before or the condition is false.
1685 * The skip condition is assumed to be an affine expression.
1687 static struct pet_scop
*pet_scop_restrict_skip(struct pet_scop
*scop
,
1688 enum pet_skip type
, __isl_keep isl_set
*cond
)
1690 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1696 if (!ext
->skip
[type
])
1699 if (!set_is_affine(ext
->skip
[type
]))
1700 isl_die(isl_set_get_ctx(ext
->skip
[type
]), isl_error_internal
,
1701 "can only resrict affine skips",
1702 return pet_scop_free(scop
));
1704 skip
= ext
->skip
[type
];
1705 skip
= isl_set_intersect_params(skip
, isl_set_copy(cond
));
1706 set
= isl_set_from_params(isl_set_copy(cond
));
1707 set
= isl_set_complement(set
);
1708 set
= isl_set_add_dims(set
, isl_dim_set
, 1);
1709 set
= isl_set_fix_si(set
, isl_dim_set
, 0, 0);
1710 skip
= isl_set_union(skip
, set
);
1711 ext
->skip
[type
] = skip
;
1712 if (!ext
->skip
[type
])
1713 return pet_scop_free(scop
);
1718 /* Add extra conditions on the parameters to all iteration domains
1719 * and skip conditions.
1721 * A parameter value is valid for the result if it was valid
1722 * for the original scop and satisfies "cond" or if it does
1723 * not satisfy "cond" as in this case the scop is not executed
1724 * and the original constraints on the parameters are irrelevant.
1726 struct pet_scop
*pet_scop_restrict(struct pet_scop
*scop
,
1727 __isl_take isl_set
*cond
)
1731 scop
= pet_scop_restrict_skip(scop
, pet_skip_now
, cond
);
1732 scop
= pet_scop_restrict_skip(scop
, pet_skip_later
, cond
);
1737 scop
->context
= isl_set_intersect(scop
->context
, isl_set_copy(cond
));
1738 scop
->context
= isl_set_union(scop
->context
,
1739 isl_set_complement(isl_set_copy(cond
)));
1740 scop
->context
= isl_set_coalesce(scop
->context
);
1741 scop
->context
= set_project_out_unnamed_params(scop
->context
);
1745 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
1746 scop
->stmts
[i
] = stmt_restrict(scop
->stmts
[i
],
1747 isl_set_copy(cond
));
1748 if (!scop
->stmts
[i
])
1756 return pet_scop_free(scop
);
1759 /* Construct a map that inserts a filter value with name "id" and value
1760 * "satisfied" in the list of filter values embedded in the set space "space".
1762 * If "space" does not contain any filter values yet, we first create
1763 * a map that inserts 0 filter values, i.e.,
1765 * space -> [space -> []]
1767 * We can now assume that space is of the form [dom -> [filters]]
1768 * We construct an identity mapping on dom and a mapping on filters
1769 * that inserts the new filter
1772 * [filters] -> [satisfied, filters]
1774 * and then compute the cross product
1776 * [dom -> [filters]] -> [dom -> [satisfied, filters]]
1778 static __isl_give isl_map
*insert_filter_map(__isl_take isl_space
*space
,
1779 __isl_take isl_id
*id
, int satisfied
)
1782 isl_map
*map
, *map_dom
, *map_ran
;
1785 if (isl_space_is_wrapping(space
)) {
1786 space2
= isl_space_map_from_set(isl_space_copy(space
));
1787 map
= isl_map_identity(space2
);
1788 space
= isl_space_unwrap(space
);
1790 space
= isl_space_from_domain(space
);
1791 map
= isl_map_universe(isl_space_copy(space
));
1792 map
= isl_map_reverse(isl_map_domain_map(map
));
1795 space2
= isl_space_domain(isl_space_copy(space
));
1796 map_dom
= isl_map_identity(isl_space_map_from_set(space2
));
1797 space
= isl_space_range(space
);
1798 map_ran
= isl_map_identity(isl_space_map_from_set(space
));
1799 map_ran
= isl_map_insert_dims(map_ran
, isl_dim_out
, 0, 1);
1800 map_ran
= isl_map_set_dim_id(map_ran
, isl_dim_out
, 0, id
);
1801 map_ran
= isl_map_fix_si(map_ran
, isl_dim_out
, 0, satisfied
);
1803 map
= isl_map_apply_range(map
, isl_map_product(map_dom
, map_ran
));
1808 /* Insert an argument expression corresponding to "test" in front
1809 * of the list of arguments described by *n_arg and *args.
1811 static int args_insert_access(unsigned *n_arg
, struct pet_expr
***args
,
1812 __isl_keep isl_map
*test
)
1815 isl_ctx
*ctx
= isl_map_get_ctx(test
);
1821 *args
= isl_calloc_array(ctx
, struct pet_expr
*, 1);
1825 struct pet_expr
**ext
;
1826 ext
= isl_calloc_array(ctx
, struct pet_expr
*, 1 + *n_arg
);
1829 for (i
= 0; i
< *n_arg
; ++i
)
1830 ext
[1 + i
] = (*args
)[i
];
1835 (*args
)[0] = pet_expr_from_access(isl_map_copy(test
));
1842 /* Make the expression "expr" depend on the value of "test"
1843 * being equal to "satisfied".
1845 * If "test" is an affine expression, we simply add the conditions
1846 * on the expression have the value "satisfied" to all access relations.
1848 * Otherwise, we add a filter to "expr" (which is then assumed to be
1849 * an access expression) corresponding to "test" being equal to "satisfied".
1851 struct pet_expr
*pet_expr_filter(struct pet_expr
*expr
,
1852 __isl_take isl_map
*test
, int satisfied
)
1862 if (!isl_map_has_tuple_id(test
, isl_dim_out
)) {
1863 test
= isl_map_fix_si(test
, isl_dim_out
, 0, satisfied
);
1864 return pet_expr_restrict(expr
, isl_map_params(test
));
1867 ctx
= isl_map_get_ctx(test
);
1868 if (expr
->type
!= pet_expr_access
)
1869 isl_die(ctx
, isl_error_invalid
,
1870 "can only filter access expressions", goto error
);
1872 space
= isl_space_domain(isl_map_get_space(expr
->acc
.access
));
1873 id
= isl_map_get_tuple_id(test
, isl_dim_out
);
1874 map
= insert_filter_map(space
, id
, satisfied
);
1876 expr
->acc
.access
= isl_map_apply_domain(expr
->acc
.access
, map
);
1877 if (!expr
->acc
.access
)
1880 if (args_insert_access(&expr
->n_arg
, &expr
->args
, test
) < 0)
1887 return pet_expr_free(expr
);
1890 /* Make the statement "stmt" depend on the value of "test"
1891 * being equal to "satisfied" by adjusting stmt->domain.
1893 * The domain of "test" corresponds to the (zero or more) outer dimensions
1894 * of the iteration domain.
1896 * We insert an argument corresponding to a read to "test"
1897 * from the iteration domain of "stmt" in front of the list of arguments.
1898 * We also insert a corresponding output dimension in the wrapped
1899 * map contained in stmt->domain, with value set to "satisfied".
1901 static struct pet_stmt
*stmt_filter(struct pet_stmt
*stmt
,
1902 __isl_take isl_map
*test
, int satisfied
)
1907 isl_map
*map
, *add_dom
;
1915 id
= isl_map_get_tuple_id(test
, isl_dim_out
);
1916 map
= insert_filter_map(isl_set_get_space(stmt
->domain
), id
, satisfied
);
1917 stmt
->domain
= isl_set_apply(stmt
->domain
, map
);
1919 space
= isl_space_unwrap(isl_set_get_space(stmt
->domain
));
1920 dom
= isl_set_universe(isl_space_domain(space
));
1921 n_test_dom
= isl_map_dim(test
, isl_dim_in
);
1922 add_dom
= isl_map_from_range(dom
);
1923 add_dom
= isl_map_add_dims(add_dom
, isl_dim_in
, n_test_dom
);
1924 for (i
= 0; i
< n_test_dom
; ++i
)
1925 add_dom
= isl_map_equate(add_dom
, isl_dim_in
, i
,
1927 test
= isl_map_apply_domain(test
, add_dom
);
1929 if (args_insert_access(&stmt
->n_arg
, &stmt
->args
, test
) < 0)
1936 return pet_stmt_free(stmt
);
1939 /* Does "scop" have a skip condition of the given "type"?
1941 int pet_scop_has_skip(struct pet_scop
*scop
, enum pet_skip type
)
1943 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1947 return ext
->skip
[type
] != NULL
;
1950 /* Does "scop" have a skip condition of the given "type" that
1951 * is an affine expression?
1953 int pet_scop_has_affine_skip(struct pet_scop
*scop
, enum pet_skip type
)
1955 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1959 if (!ext
->skip
[type
])
1961 return set_is_affine(ext
->skip
[type
]);
1964 /* Does "scop" have a skip condition of the given "type" that
1965 * is not an affine expression?
1967 int pet_scop_has_var_skip(struct pet_scop
*scop
, enum pet_skip type
)
1969 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1974 if (!ext
->skip
[type
])
1976 aff
= set_is_affine(ext
->skip
[type
]);
1982 /* Does "scop" have a skip condition of the given "type" that
1983 * is affine and holds on the entire domain?
1985 int pet_scop_has_universal_skip(struct pet_scop
*scop
, enum pet_skip type
)
1987 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
1992 is_aff
= pet_scop_has_affine_skip(scop
, type
);
1993 if (is_aff
< 0 || !is_aff
)
1996 set
= isl_set_copy(ext
->skip
[type
]);
1997 set
= isl_set_fix_si(set
, isl_dim_set
, 0, 1);
1998 set
= isl_set_params(set
);
1999 is_univ
= isl_set_plain_is_universe(set
);
2005 /* Replace scop->skip[type] by "skip".
2007 struct pet_scop
*pet_scop_set_skip(struct pet_scop
*scop
,
2008 enum pet_skip type
, __isl_take isl_set
*skip
)
2010 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2015 isl_set_free(ext
->skip
[type
]);
2016 ext
->skip
[type
] = skip
;
2021 return pet_scop_free(scop
);
2024 /* Return a copy of scop->skip[type].
2026 __isl_give isl_set
*pet_scop_get_skip(struct pet_scop
*scop
,
2029 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2034 return isl_set_copy(ext
->skip
[type
]);
2037 /* Return a map to the skip condition of the given type.
2039 __isl_give isl_map
*pet_scop_get_skip_map(struct pet_scop
*scop
,
2042 return isl_map_from_range(pet_scop_get_skip(scop
, type
));
2045 /* Return an access pet_expr corresponding to the skip condition
2046 * of the given type.
2048 struct pet_expr
*pet_scop_get_skip_expr(struct pet_scop
*scop
,
2051 return pet_expr_from_access(pet_scop_get_skip_map(scop
, type
));
2054 /* Drop the the skip condition scop->skip[type].
2056 void pet_scop_reset_skip(struct pet_scop
*scop
, enum pet_skip type
)
2058 struct pet_scop_ext
*ext
= (struct pet_scop_ext
*) scop
;
2063 isl_set_free(ext
->skip
[type
]);
2064 ext
->skip
[type
] = NULL
;
2067 /* Make the skip condition (if any) depend on the value of "test" being
2068 * equal to "satisfied".
2070 * We only support the case where the original skip condition is universal,
2071 * i.e., where skipping is unconditional, and where satisfied == 1.
2072 * In this case, the skip condition is changed to skip only when
2073 * "test" is equal to one.
2075 static struct pet_scop
*pet_scop_filter_skip(struct pet_scop
*scop
,
2076 enum pet_skip type
, __isl_keep isl_map
*test
, int satisfied
)
2082 if (!pet_scop_has_skip(scop
, type
))
2086 is_univ
= pet_scop_has_universal_skip(scop
, type
);
2088 return pet_scop_free(scop
);
2089 if (satisfied
&& is_univ
) {
2090 scop
= pet_scop_set_skip(scop
, type
,
2091 isl_map_range(isl_map_copy(test
)));
2095 isl_die(isl_map_get_ctx(test
), isl_error_internal
,
2096 "skip expression cannot be filtered",
2097 return pet_scop_free(scop
));
2103 /* Make all statements in "scop" depend on the value of "test"
2104 * being equal to "satisfied" by adjusting their domains.
2106 struct pet_scop
*pet_scop_filter(struct pet_scop
*scop
,
2107 __isl_take isl_map
*test
, int satisfied
)
2111 scop
= pet_scop_filter_skip(scop
, pet_skip_now
, test
, satisfied
);
2112 scop
= pet_scop_filter_skip(scop
, pet_skip_later
, test
, satisfied
);
2117 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2118 scop
->stmts
[i
] = stmt_filter(scop
->stmts
[i
],
2119 isl_map_copy(test
), satisfied
);
2120 if (!scop
->stmts
[i
])
2128 return pet_scop_free(scop
);
2131 /* Do the filters "i" and "j" always have the same value?
2133 static int equal_filter_values(__isl_keep isl_set
*domain
, int i
, int j
)
2135 isl_map
*map
, *test
;
2138 map
= isl_set_unwrap(isl_set_copy(domain
));
2139 test
= isl_map_universe(isl_map_get_space(map
));
2140 test
= isl_map_equate(test
, isl_dim_out
, i
, isl_dim_out
, j
);
2141 equal
= isl_map_is_subset(map
, test
);
2148 /* Merge filters "i" and "j" into a single filter ("i") with as filter
2149 * access relation, the union of the two access relations.
2151 static struct pet_stmt
*merge_filter_pair(struct pet_stmt
*stmt
, int i
, int j
)
2159 stmt
->args
[i
]->acc
.access
= isl_map_union(stmt
->args
[i
]->acc
.access
,
2160 isl_map_copy(stmt
->args
[j
]->acc
.access
));
2161 stmt
->args
[i
]->acc
.access
= isl_map_coalesce(stmt
->args
[i
]->acc
.access
);
2163 pet_expr_free(stmt
->args
[j
]);
2164 for (k
= j
; k
< stmt
->n_arg
- 1; ++k
)
2165 stmt
->args
[k
] = stmt
->args
[k
+ 1];
2168 map
= isl_set_unwrap(stmt
->domain
);
2169 map
= isl_map_project_out(map
, isl_dim_out
, j
, 1);
2170 stmt
->domain
= isl_map_wrap(map
);
2172 if (!stmt
->domain
|| !stmt
->args
[i
]->acc
.access
)
2173 return pet_stmt_free(stmt
);
2178 /* Look for any pair of filters that access the same filter variable
2179 * and that have the same filter value and merge them into a single
2180 * filter with as filter access relation the union of the filter access
2183 static struct pet_stmt
*stmt_merge_filters(struct pet_stmt
*stmt
)
2186 isl_space
*space_i
, *space_j
;
2190 if (stmt
->n_arg
<= 1)
2193 for (i
= 0; i
< stmt
->n_arg
- 1; ++i
) {
2194 if (stmt
->args
[i
]->type
!= pet_expr_access
)
2196 if (pet_expr_is_affine(stmt
->args
[i
]))
2199 space_i
= isl_map_get_space(stmt
->args
[i
]->acc
.access
);
2201 for (j
= stmt
->n_arg
- 1; j
> i
; --j
) {
2204 if (stmt
->args
[j
]->type
!= pet_expr_access
)
2206 if (pet_expr_is_affine(stmt
->args
[j
]))
2209 space_j
= isl_map_get_space(stmt
->args
[j
]->acc
.access
);
2211 eq
= isl_space_is_equal(space_i
, space_j
);
2213 eq
= equal_filter_values(stmt
->domain
, i
, j
);
2215 stmt
= merge_filter_pair(stmt
, i
, j
);
2217 isl_space_free(space_j
);
2219 if (eq
< 0 || !stmt
)
2223 isl_space_free(space_i
);
2226 return pet_stmt_free(stmt
);
2232 /* Look for any pair of filters that access the same filter variable
2233 * and that have the same filter value and merge them into a single
2234 * filter with as filter access relation the union of the filter access
2237 struct pet_scop
*pet_scop_merge_filters(struct pet_scop
*scop
)
2244 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2245 scop
->stmts
[i
] = stmt_merge_filters(scop
->stmts
[i
]);
2246 if (!scop
->stmts
[i
])
2247 return pet_scop_free(scop
);
2253 /* Add all parameters in "expr" to "dim" and return the result.
2255 static __isl_give isl_space
*expr_collect_params(struct pet_expr
*expr
,
2256 __isl_take isl_space
*dim
)
2262 for (i
= 0; i
< expr
->n_arg
; ++i
)
2264 dim
= expr_collect_params(expr
->args
[i
], dim
);
2266 if (expr
->type
== pet_expr_access
)
2267 dim
= isl_space_align_params(dim
,
2268 isl_map_get_space(expr
->acc
.access
));
2272 isl_space_free(dim
);
2273 return pet_expr_free(expr
);
2276 /* Add all parameters in "stmt" to "dim" and return the result.
2278 static __isl_give isl_space
*stmt_collect_params(struct pet_stmt
*stmt
,
2279 __isl_take isl_space
*dim
)
2284 dim
= isl_space_align_params(dim
, isl_set_get_space(stmt
->domain
));
2285 dim
= isl_space_align_params(dim
, isl_map_get_space(stmt
->schedule
));
2286 dim
= expr_collect_params(stmt
->body
, dim
);
2290 isl_space_free(dim
);
2291 return pet_stmt_free(stmt
);
2294 /* Add all parameters in "array" to "dim" and return the result.
2296 static __isl_give isl_space
*array_collect_params(struct pet_array
*array
,
2297 __isl_take isl_space
*dim
)
2302 dim
= isl_space_align_params(dim
, isl_set_get_space(array
->context
));
2303 dim
= isl_space_align_params(dim
, isl_set_get_space(array
->extent
));
2307 pet_array_free(array
);
2308 return isl_space_free(dim
);
2311 /* Add all parameters in "scop" to "dim" and return the result.
2313 static __isl_give isl_space
*scop_collect_params(struct pet_scop
*scop
,
2314 __isl_take isl_space
*dim
)
2321 for (i
= 0; i
< scop
->n_array
; ++i
)
2322 dim
= array_collect_params(scop
->arrays
[i
], dim
);
2324 for (i
= 0; i
< scop
->n_stmt
; ++i
)
2325 dim
= stmt_collect_params(scop
->stmts
[i
], dim
);
2329 isl_space_free(dim
);
2330 return pet_scop_free(scop
);
2333 /* Add all parameters in "dim" to all access relations in "expr".
2335 static struct pet_expr
*expr_propagate_params(struct pet_expr
*expr
,
2336 __isl_take isl_space
*dim
)
2343 for (i
= 0; i
< expr
->n_arg
; ++i
) {
2345 expr_propagate_params(expr
->args
[i
],
2346 isl_space_copy(dim
));
2351 if (expr
->type
== pet_expr_access
) {
2352 expr
->acc
.access
= isl_map_align_params(expr
->acc
.access
,
2353 isl_space_copy(dim
));
2354 if (!expr
->acc
.access
)
2358 isl_space_free(dim
);
2361 isl_space_free(dim
);
2362 return pet_expr_free(expr
);
2365 /* Add all parameters in "dim" to the domain, schedule and
2366 * all access relations in "stmt".
2368 static struct pet_stmt
*stmt_propagate_params(struct pet_stmt
*stmt
,
2369 __isl_take isl_space
*dim
)
2374 stmt
->domain
= isl_set_align_params(stmt
->domain
, isl_space_copy(dim
));
2375 stmt
->schedule
= isl_map_align_params(stmt
->schedule
,
2376 isl_space_copy(dim
));
2377 stmt
->body
= expr_propagate_params(stmt
->body
, isl_space_copy(dim
));
2379 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
2382 isl_space_free(dim
);
2385 isl_space_free(dim
);
2386 return pet_stmt_free(stmt
);
2389 /* Add all parameters in "dim" to "array".
2391 static struct pet_array
*array_propagate_params(struct pet_array
*array
,
2392 __isl_take isl_space
*dim
)
2397 array
->context
= isl_set_align_params(array
->context
,
2398 isl_space_copy(dim
));
2399 array
->extent
= isl_set_align_params(array
->extent
,
2400 isl_space_copy(dim
));
2401 if (array
->value_bounds
) {
2402 array
->value_bounds
= isl_set_align_params(array
->value_bounds
,
2403 isl_space_copy(dim
));
2404 if (!array
->value_bounds
)
2408 if (!array
->context
|| !array
->extent
)
2411 isl_space_free(dim
);
2414 isl_space_free(dim
);
2415 return pet_array_free(array
);
2418 /* Add all parameters in "dim" to "scop".
2420 static struct pet_scop
*scop_propagate_params(struct pet_scop
*scop
,
2421 __isl_take isl_space
*dim
)
2428 for (i
= 0; i
< scop
->n_array
; ++i
) {
2429 scop
->arrays
[i
] = array_propagate_params(scop
->arrays
[i
],
2430 isl_space_copy(dim
));
2431 if (!scop
->arrays
[i
])
2435 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2436 scop
->stmts
[i
] = stmt_propagate_params(scop
->stmts
[i
],
2437 isl_space_copy(dim
));
2438 if (!scop
->stmts
[i
])
2442 isl_space_free(dim
);
2445 isl_space_free(dim
);
2446 return pet_scop_free(scop
);
2449 /* Update all isl_sets and isl_maps in "scop" such that they all
2450 * have the same parameters.
2452 struct pet_scop
*pet_scop_align_params(struct pet_scop
*scop
)
2459 dim
= isl_set_get_space(scop
->context
);
2460 dim
= scop_collect_params(scop
, dim
);
2462 scop
->context
= isl_set_align_params(scop
->context
, isl_space_copy(dim
));
2463 scop
= scop_propagate_params(scop
, dim
);
2468 /* Check if the given access relation accesses a (0D) array that corresponds
2469 * to one of the parameters in "dim". If so, replace the array access
2470 * by an access to the set of integers with as index (and value)
2473 static __isl_give isl_map
*access_detect_parameter(__isl_take isl_map
*access
,
2474 __isl_take isl_space
*dim
)
2476 isl_id
*array_id
= NULL
;
2479 if (isl_map_has_tuple_id(access
, isl_dim_out
)) {
2480 array_id
= isl_map_get_tuple_id(access
, isl_dim_out
);
2481 pos
= isl_space_find_dim_by_id(dim
, isl_dim_param
, array_id
);
2483 isl_space_free(dim
);
2486 isl_id_free(array_id
);
2490 pos
= isl_map_find_dim_by_id(access
, isl_dim_param
, array_id
);
2492 access
= isl_map_insert_dims(access
, isl_dim_param
, 0, 1);
2493 access
= isl_map_set_dim_id(access
, isl_dim_param
, 0, array_id
);
2496 isl_id_free(array_id
);
2498 access
= isl_map_insert_dims(access
, isl_dim_out
, 0, 1);
2499 access
= isl_map_equate(access
, isl_dim_param
, pos
, isl_dim_out
, 0);
2504 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2505 * in "dim" by a value equal to the corresponding parameter.
2507 static struct pet_expr
*expr_detect_parameter_accesses(struct pet_expr
*expr
,
2508 __isl_take isl_space
*dim
)
2515 for (i
= 0; i
< expr
->n_arg
; ++i
) {
2517 expr_detect_parameter_accesses(expr
->args
[i
],
2518 isl_space_copy(dim
));
2523 if (expr
->type
== pet_expr_access
) {
2524 expr
->acc
.access
= access_detect_parameter(expr
->acc
.access
,
2525 isl_space_copy(dim
));
2526 if (!expr
->acc
.access
)
2530 isl_space_free(dim
);
2533 isl_space_free(dim
);
2534 return pet_expr_free(expr
);
2537 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2538 * in "dim" by a value equal to the corresponding parameter.
2540 static struct pet_stmt
*stmt_detect_parameter_accesses(struct pet_stmt
*stmt
,
2541 __isl_take isl_space
*dim
)
2546 stmt
->body
= expr_detect_parameter_accesses(stmt
->body
,
2547 isl_space_copy(dim
));
2549 if (!stmt
->domain
|| !stmt
->schedule
|| !stmt
->body
)
2552 isl_space_free(dim
);
2555 isl_space_free(dim
);
2556 return pet_stmt_free(stmt
);
2559 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
2560 * in "dim" by a value equal to the corresponding parameter.
2562 static struct pet_scop
*scop_detect_parameter_accesses(struct pet_scop
*scop
,
2563 __isl_take isl_space
*dim
)
2570 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2571 scop
->stmts
[i
] = stmt_detect_parameter_accesses(scop
->stmts
[i
],
2572 isl_space_copy(dim
));
2573 if (!scop
->stmts
[i
])
2577 isl_space_free(dim
);
2580 isl_space_free(dim
);
2581 return pet_scop_free(scop
);
2584 /* Replace all accesses to (0D) arrays that correspond to any of
2585 * the parameters used in "scop" by a value equal
2586 * to the corresponding parameter.
2588 struct pet_scop
*pet_scop_detect_parameter_accesses(struct pet_scop
*scop
)
2595 dim
= isl_set_get_space(scop
->context
);
2596 dim
= scop_collect_params(scop
, dim
);
2598 scop
= scop_detect_parameter_accesses(scop
, dim
);
2603 /* Add all read access relations (if "read" is set) and/or all write
2604 * access relations (if "write" is set) to "accesses" and return the result.
2606 static __isl_give isl_union_map
*expr_collect_accesses(struct pet_expr
*expr
,
2607 int read
, int write
, __isl_take isl_union_map
*accesses
)
2616 for (i
= 0; i
< expr
->n_arg
; ++i
)
2617 accesses
= expr_collect_accesses(expr
->args
[i
],
2618 read
, write
, accesses
);
2620 if (expr
->type
== pet_expr_access
&&
2621 isl_map_has_tuple_id(expr
->acc
.access
, isl_dim_out
) &&
2622 ((read
&& expr
->acc
.read
) || (write
&& expr
->acc
.write
)))
2623 accesses
= isl_union_map_add_map(accesses
,
2624 isl_map_copy(expr
->acc
.access
));
2629 /* Collect and return all read access relations (if "read" is set)
2630 * and/or all write access relations (if "write" is set) in "stmt".
2632 static __isl_give isl_union_map
*stmt_collect_accesses(struct pet_stmt
*stmt
,
2633 int read
, int write
, __isl_take isl_space
*dim
)
2635 isl_union_map
*accesses
;
2640 accesses
= isl_union_map_empty(dim
);
2641 accesses
= expr_collect_accesses(stmt
->body
, read
, write
, accesses
);
2642 accesses
= isl_union_map_intersect_domain(accesses
,
2643 isl_union_set_from_set(isl_set_copy(stmt
->domain
)));
2648 /* Collect and return all read access relations (if "read" is set)
2649 * and/or all write access relations (if "write" is set) in "scop".
2651 static __isl_give isl_union_map
*scop_collect_accesses(struct pet_scop
*scop
,
2652 int read
, int write
)
2655 isl_union_map
*accesses
;
2660 accesses
= isl_union_map_empty(isl_set_get_space(scop
->context
));
2662 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2663 isl_union_map
*accesses_i
;
2664 isl_space
*dim
= isl_set_get_space(scop
->context
);
2665 accesses_i
= stmt_collect_accesses(scop
->stmts
[i
],
2667 accesses
= isl_union_map_union(accesses
, accesses_i
);
2673 __isl_give isl_union_map
*pet_scop_collect_reads(struct pet_scop
*scop
)
2675 return scop_collect_accesses(scop
, 1, 0);
2678 __isl_give isl_union_map
*pet_scop_collect_writes(struct pet_scop
*scop
)
2680 return scop_collect_accesses(scop
, 0, 1);
2683 /* Collect and return the union of iteration domains in "scop".
2685 __isl_give isl_union_set
*pet_scop_collect_domains(struct pet_scop
*scop
)
2689 isl_union_set
*domain
;
2694 domain
= isl_union_set_empty(isl_set_get_space(scop
->context
));
2696 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2697 domain_i
= isl_set_copy(scop
->stmts
[i
]->domain
);
2698 domain
= isl_union_set_add_set(domain
, domain_i
);
2704 /* Collect and return the schedules of the statements in "scop".
2705 * The range is normalized to the maximal number of scheduling
2708 __isl_give isl_union_map
*pet_scop_collect_schedule(struct pet_scop
*scop
)
2711 isl_map
*schedule_i
;
2712 isl_union_map
*schedule
;
2713 int depth
, max_depth
= 0;
2718 schedule
= isl_union_map_empty(isl_set_get_space(scop
->context
));
2720 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2721 depth
= isl_map_dim(scop
->stmts
[i
]->schedule
, isl_dim_out
);
2722 if (depth
> max_depth
)
2726 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2727 schedule_i
= isl_map_copy(scop
->stmts
[i
]->schedule
);
2728 depth
= isl_map_dim(schedule_i
, isl_dim_out
);
2729 schedule_i
= isl_map_add_dims(schedule_i
, isl_dim_out
,
2731 for (j
= depth
; j
< max_depth
; ++j
)
2732 schedule_i
= isl_map_fix_si(schedule_i
,
2734 schedule
= isl_union_map_add_map(schedule
, schedule_i
);
2740 /* Does expression "expr" write to "id"?
2742 static int expr_writes(struct pet_expr
*expr
, __isl_keep isl_id
*id
)
2747 for (i
= 0; i
< expr
->n_arg
; ++i
) {
2748 int writes
= expr_writes(expr
->args
[i
], id
);
2749 if (writes
< 0 || writes
)
2753 if (expr
->type
!= pet_expr_access
)
2755 if (!expr
->acc
.write
)
2757 if (!isl_map_has_tuple_id(expr
->acc
.access
, isl_dim_out
))
2760 write_id
= isl_map_get_tuple_id(expr
->acc
.access
, isl_dim_out
);
2761 isl_id_free(write_id
);
2766 return write_id
== id
;
2769 /* Does statement "stmt" write to "id"?
2771 static int stmt_writes(struct pet_stmt
*stmt
, __isl_keep isl_id
*id
)
2773 return expr_writes(stmt
->body
, id
);
2776 /* Is there any write access in "scop" that accesses "id"?
2778 int pet_scop_writes(struct pet_scop
*scop
, __isl_keep isl_id
*id
)
2785 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2786 int writes
= stmt_writes(scop
->stmts
[i
], id
);
2787 if (writes
< 0 || writes
)
2794 /* Reset the user pointer on the tuple id and all parameter ids in "set".
2796 static __isl_give isl_set
*set_anonymize(__isl_take isl_set
*set
)
2800 n
= isl_set_dim(set
, isl_dim_param
);
2801 for (i
= 0; i
< n
; ++i
) {
2802 isl_id
*id
= isl_set_get_dim_id(set
, isl_dim_param
, i
);
2803 const char *name
= isl_id_get_name(id
);
2804 set
= isl_set_set_dim_name(set
, isl_dim_param
, i
, name
);
2808 if (!isl_set_is_params(set
) && isl_set_has_tuple_id(set
)) {
2809 isl_id
*id
= isl_set_get_tuple_id(set
);
2810 const char *name
= isl_id_get_name(id
);
2811 set
= isl_set_set_tuple_name(set
, name
);
2818 /* Reset the user pointer on the tuple ids and all parameter ids in "map".
2820 static __isl_give isl_map
*map_anonymize(__isl_take isl_map
*map
)
2824 n
= isl_map_dim(map
, isl_dim_param
);
2825 for (i
= 0; i
< n
; ++i
) {
2826 isl_id
*id
= isl_map_get_dim_id(map
, isl_dim_param
, i
);
2827 const char *name
= isl_id_get_name(id
);
2828 map
= isl_map_set_dim_name(map
, isl_dim_param
, i
, name
);
2832 if (isl_map_has_tuple_id(map
, isl_dim_in
)) {
2833 isl_id
*id
= isl_map_get_tuple_id(map
, isl_dim_in
);
2834 const char *name
= isl_id_get_name(id
);
2835 map
= isl_map_set_tuple_name(map
, isl_dim_in
, name
);
2839 if (isl_map_has_tuple_id(map
, isl_dim_out
)) {
2840 isl_id
*id
= isl_map_get_tuple_id(map
, isl_dim_out
);
2841 const char *name
= isl_id_get_name(id
);
2842 map
= isl_map_set_tuple_name(map
, isl_dim_out
, name
);
2849 /* Reset the user pointer on all parameter ids in "array".
2851 static struct pet_array
*array_anonymize(struct pet_array
*array
)
2856 array
->context
= set_anonymize(array
->context
);
2857 array
->extent
= set_anonymize(array
->extent
);
2858 if (!array
->context
|| !array
->extent
)
2859 return pet_array_free(array
);
2864 /* Reset the user pointer on all parameter and tuple ids in "access".
2866 static __isl_give isl_map
*access_anonymize(__isl_take isl_map
*access
,
2869 access
= map_anonymize(access
);
2874 /* Reset the user pointer on all parameter and tuple ids in "stmt".
2876 static struct pet_stmt
*stmt_anonymize(struct pet_stmt
*stmt
)
2885 stmt
->domain
= set_anonymize(stmt
->domain
);
2886 stmt
->schedule
= map_anonymize(stmt
->schedule
);
2887 if (!stmt
->domain
|| !stmt
->schedule
)
2888 return pet_stmt_free(stmt
);
2890 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
2891 stmt
->args
[i
] = pet_expr_foreach_access(stmt
->args
[i
],
2892 &access_anonymize
, NULL
);
2894 return pet_stmt_free(stmt
);
2897 stmt
->body
= pet_expr_foreach_access(stmt
->body
,
2898 &access_anonymize
, NULL
);
2900 return pet_stmt_free(stmt
);
2905 /* Reset the user pointer on all parameter and tuple ids in "scop".
2907 struct pet_scop
*pet_scop_anonymize(struct pet_scop
*scop
)
2914 scop
->context
= set_anonymize(scop
->context
);
2915 scop
->context_value
= set_anonymize(scop
->context_value
);
2916 if (!scop
->context
|| !scop
->context_value
)
2917 return pet_scop_free(scop
);
2919 for (i
= 0; i
< scop
->n_array
; ++i
) {
2920 scop
->arrays
[i
] = array_anonymize(scop
->arrays
[i
]);
2921 if (!scop
->arrays
[i
])
2922 return pet_scop_free(scop
);
2925 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
2926 scop
->stmts
[i
] = stmt_anonymize(scop
->stmts
[i
]);
2927 if (!scop
->stmts
[i
])
2928 return pet_scop_free(scop
);
2934 /* Given a set "domain", return a wrapped relation with the given set
2935 * as domain and a range of dimension "n_arg", where each coordinate
2936 * is either unbounded or, if the corresponding element of args is of
2937 * type pet_expr_access, bounded by the bounds specified by "value_bounds".
2939 static __isl_give isl_set
*apply_value_bounds(__isl_take isl_set
*domain
,
2940 unsigned n_arg
, struct pet_expr
**args
,
2941 __isl_keep isl_union_map
*value_bounds
)
2946 isl_ctx
*ctx
= isl_set_get_ctx(domain
);
2948 map
= isl_map_from_domain(domain
);
2949 space
= isl_map_get_space(map
);
2950 space
= isl_space_add_dims(space
, isl_dim_out
, 1);
2952 for (i
= 0; i
< n_arg
; ++i
) {
2954 struct pet_expr
*arg
= args
[i
];
2958 map_i
= isl_map_universe(isl_space_copy(space
));
2959 if (arg
->type
== pet_expr_access
) {
2961 id
= isl_map_get_tuple_id(arg
->acc
.access
, isl_dim_out
);
2962 space2
= isl_space_alloc(ctx
, 0, 0, 1);
2963 space2
= isl_space_set_tuple_id(space2
, isl_dim_in
, id
);
2964 vb
= isl_union_map_extract_map(value_bounds
, space2
);
2965 if (!isl_map_plain_is_empty(vb
))
2966 map_i
= isl_map_intersect_range(map_i
,
2971 map
= isl_map_flat_range_product(map
, map_i
);
2973 isl_space_free(space
);
2975 return isl_map_wrap(map
);
2978 /* Data used in access_gist() callback.
2980 struct pet_access_gist_data
{
2982 isl_union_map
*value_bounds
;
2985 /* Given an expression "expr" of type pet_expr_access, compute
2986 * the gist of the associated access relation with respect to
2987 * data->domain and the bounds on the values of the arguments
2988 * of the expression.
2990 static struct pet_expr
*access_gist(struct pet_expr
*expr
, void *user
)
2992 struct pet_access_gist_data
*data
= user
;
2995 domain
= isl_set_copy(data
->domain
);
2996 if (expr
->n_arg
> 0)
2997 domain
= apply_value_bounds(domain
, expr
->n_arg
, expr
->args
,
2998 data
->value_bounds
);
3000 expr
->acc
.access
= isl_map_gist_domain(expr
->acc
.access
, domain
);
3001 if (!expr
->acc
.access
)
3002 return pet_expr_free(expr
);
3007 /* Compute the gist of the iteration domain and all access relations
3008 * of "stmt" based on the constraints on the parameters specified by "context"
3009 * and the constraints on the values of nested accesses specified
3010 * by "value_bounds".
3012 static struct pet_stmt
*stmt_gist(struct pet_stmt
*stmt
,
3013 __isl_keep isl_set
*context
, __isl_keep isl_union_map
*value_bounds
)
3018 struct pet_access_gist_data data
;
3023 data
.domain
= isl_set_copy(stmt
->domain
);
3024 data
.value_bounds
= value_bounds
;
3025 if (stmt
->n_arg
> 0)
3026 data
.domain
= isl_map_domain(isl_set_unwrap(data
.domain
));
3028 data
.domain
= isl_set_intersect_params(data
.domain
,
3029 isl_set_copy(context
));
3031 for (i
= 0; i
< stmt
->n_arg
; ++i
) {
3032 stmt
->args
[i
] = pet_expr_foreach_access_expr(stmt
->args
[i
],
3033 &access_gist
, &data
);
3038 stmt
->body
= pet_expr_foreach_access_expr(stmt
->body
,
3039 &access_gist
, &data
);
3043 isl_set_free(data
.domain
);
3045 space
= isl_set_get_space(stmt
->domain
);
3046 if (isl_space_is_wrapping(space
))
3047 space
= isl_space_domain(isl_space_unwrap(space
));
3048 domain
= isl_set_universe(space
);
3049 domain
= isl_set_intersect_params(domain
, isl_set_copy(context
));
3050 if (stmt
->n_arg
> 0)
3051 domain
= apply_value_bounds(domain
, stmt
->n_arg
, stmt
->args
,
3053 stmt
->domain
= isl_set_gist(stmt
->domain
, domain
);
3055 return pet_stmt_free(stmt
);
3059 isl_set_free(data
.domain
);
3060 return pet_stmt_free(stmt
);
3063 /* Compute the gist of the extent of the array
3064 * based on the constraints on the parameters specified by "context".
3066 static struct pet_array
*array_gist(struct pet_array
*array
,
3067 __isl_keep isl_set
*context
)
3072 array
->extent
= isl_set_gist_params(array
->extent
,
3073 isl_set_copy(context
));
3075 return pet_array_free(array
);
3080 /* Compute the gist of all sets and relations in "scop"
3081 * based on the constraints on the parameters specified by "scop->context"
3082 * and the constraints on the values of nested accesses specified
3083 * by "value_bounds".
3085 struct pet_scop
*pet_scop_gist(struct pet_scop
*scop
,
3086 __isl_keep isl_union_map
*value_bounds
)
3093 scop
->context
= isl_set_coalesce(scop
->context
);
3095 return pet_scop_free(scop
);
3097 for (i
= 0; i
< scop
->n_array
; ++i
) {
3098 scop
->arrays
[i
] = array_gist(scop
->arrays
[i
], scop
->context
);
3099 if (!scop
->arrays
[i
])
3100 return pet_scop_free(scop
);
3103 for (i
= 0; i
< scop
->n_stmt
; ++i
) {
3104 scop
->stmts
[i
] = stmt_gist(scop
->stmts
[i
], scop
->context
,
3106 if (!scop
->stmts
[i
])
3107 return pet_scop_free(scop
);
3113 /* Intersect the context of "scop" with "context".
3114 * To ensure that we don't introduce any unnamed parameters in
3115 * the context of "scop", we first remove the unnamed parameters
3118 struct pet_scop
*pet_scop_restrict_context(struct pet_scop
*scop
,
3119 __isl_take isl_set
*context
)
3124 context
= set_project_out_unnamed_params(context
);
3125 scop
->context
= isl_set_intersect(scop
->context
, context
);
3127 return pet_scop_free(scop
);
3131 isl_set_free(context
);
3132 return pet_scop_free(scop
);
3135 /* Drop the current context of "scop". That is, replace the context
3136 * by a universal set.
3138 struct pet_scop
*pet_scop_reset_context(struct pet_scop
*scop
)
3145 space
= isl_set_get_space(scop
->context
);
3146 isl_set_free(scop
->context
);
3147 scop
->context
= isl_set_universe(space
);
3149 return pet_scop_free(scop
);
3154 /* Append "array" to the arrays of "scop".
3156 struct pet_scop
*pet_scop_add_array(struct pet_scop
*scop
,
3157 struct pet_array
*array
)
3160 struct pet_array
**arrays
;
3162 if (!array
|| !scop
)
3165 ctx
= isl_set_get_ctx(scop
->context
);
3166 arrays
= isl_realloc_array(ctx
, scop
->arrays
, struct pet_array
*,
3170 scop
->arrays
= arrays
;
3171 scop
->arrays
[scop
->n_array
] = array
;
3176 pet_array_free(array
);
3177 return pet_scop_free(scop
);