2 * Copyright 2011 Leiden University. All rights reserved.
3 * Copyright 2012-2014 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
44 #include "value_bounds.h"
46 #define ARRAY_SIZE(array) (sizeof(array)/sizeof(*array))
48 static char *type_str
[] = {
49 [pet_expr_access
] = "access",
50 [pet_expr_call
] = "call",
51 [pet_expr_cast
] = "cast",
52 [pet_expr_double
] = "double",
53 [pet_expr_int
] = "int",
57 static char *op_str
[] = {
58 [pet_op_add_assign
] = "+=",
59 [pet_op_sub_assign
] = "-=",
60 [pet_op_mul_assign
] = "*=",
61 [pet_op_div_assign
] = "/=",
62 [pet_op_assign
] = "=",
77 [pet_op_post_inc
] = "++",
78 [pet_op_post_dec
] = "--",
79 [pet_op_pre_inc
] = "++",
80 [pet_op_pre_dec
] = "--",
81 [pet_op_address_of
] = "&",
90 [pet_op_assume
] = "assume",
91 [pet_op_kill
] = "kill"
94 const char *pet_op_str(enum pet_op_type op
)
99 int pet_op_is_inc_dec(enum pet_op_type op
)
101 return op
== pet_op_post_inc
|| op
== pet_op_post_dec
||
102 op
== pet_op_pre_inc
|| op
== pet_op_pre_dec
;
105 const char *pet_type_str(enum pet_expr_type type
)
107 return type_str
[type
];
110 enum pet_op_type
pet_str_op(const char *str
)
114 for (i
= 0; i
< ARRAY_SIZE(op_str
); ++i
)
115 if (!strcmp(op_str
[i
], str
))
121 enum pet_expr_type
pet_str_type(const char *str
)
125 for (i
= 0; i
< ARRAY_SIZE(type_str
); ++i
)
126 if (!strcmp(type_str
[i
], str
))
132 /* Construct a pet_expr of the given type.
134 __isl_give pet_expr
*pet_expr_alloc(isl_ctx
*ctx
, enum pet_expr_type type
)
138 expr
= isl_calloc_type(ctx
, struct pet_expr
);
150 /* Construct an access pet_expr from an access relation and an index expression.
151 * By default, it is considered to be a read access.
153 __isl_give pet_expr
*pet_expr_from_access_and_index( __isl_take isl_map
*access
,
154 __isl_take isl_multi_pw_aff
*index
)
156 isl_ctx
*ctx
= isl_map_get_ctx(access
);
159 if (!index
|| !access
)
161 expr
= pet_expr_alloc(ctx
, pet_expr_access
);
165 expr
->acc
.access
= access
;
166 expr
->acc
.index
= index
;
172 isl_map_free(access
);
173 isl_multi_pw_aff_free(index
);
177 /* Construct an access pet_expr from an index expression.
178 * By default, the access is considered to be a read access.
180 __isl_give pet_expr
*pet_expr_from_index(__isl_take isl_multi_pw_aff
*index
)
184 access
= isl_map_from_multi_pw_aff(isl_multi_pw_aff_copy(index
));
185 return pet_expr_from_access_and_index(access
, index
);
188 /* Extend the range of "access" with "n" dimensions, retaining
189 * the tuple identifier on this range.
191 * If "access" represents a member access, then extend the range
194 static __isl_give isl_map
*extend_range(__isl_take isl_map
*access
, int n
)
198 id
= isl_map_get_tuple_id(access
, isl_dim_out
);
200 if (!isl_map_range_is_wrapping(access
)) {
201 access
= isl_map_add_dims(access
, isl_dim_out
, n
);
205 domain
= isl_map_copy(access
);
206 domain
= isl_map_range_factor_domain(domain
);
207 access
= isl_map_range_factor_range(access
);
208 access
= extend_range(access
, n
);
209 access
= isl_map_range_product(domain
, access
);
212 access
= isl_map_set_tuple_id(access
, isl_dim_out
, id
);
217 /* Finalize the construction of an access expression by setting
218 * the depth of the accessed array.
220 * The index expression may have been updated by
221 * pet_expr_access_subscript and/or pet_expr_access_member
222 * without the access relation having been updated accordingly.
223 * We perform this update here, taking into account the depth
224 * of the accessed array.
226 * If the number of indices is smaller than the depth of the array,
227 * then we assume that all elements of the remaining dimensions
230 __isl_give pet_expr
*pet_expr_access_set_depth(__isl_take pet_expr
*expr
,
236 expr
= pet_expr_cow(expr
);
240 access
= isl_map_from_multi_pw_aff(pet_expr_access_get_index(expr
));
242 return pet_expr_free(expr
);
244 dim
= isl_map_dim(access
, isl_dim_out
);
246 isl_die(isl_map_get_ctx(access
), isl_error_internal
,
247 "number of indices greater than depth",
248 access
= isl_map_free(access
));
251 access
= extend_range(access
, depth
- dim
);
253 return pet_expr_access_set_access(expr
, access
);
256 /* Construct a pet_expr that kills the elements specified by
257 * the index expression "index" and the access relation "access".
259 __isl_give pet_expr
*pet_expr_kill_from_access_and_index(
260 __isl_take isl_map
*access
, __isl_take isl_multi_pw_aff
*index
)
264 if (!access
|| !index
)
267 expr
= pet_expr_from_access_and_index(access
, index
);
268 expr
= pet_expr_access_set_read(expr
, 0);
269 return pet_expr_new_unary(pet_op_kill
, expr
);
271 isl_map_free(access
);
272 isl_multi_pw_aff_free(index
);
276 /* Construct a unary pet_expr that performs "op" on "arg".
278 __isl_give pet_expr
*pet_expr_new_unary(enum pet_op_type op
,
279 __isl_take pet_expr
*arg
)
286 ctx
= pet_expr_get_ctx(arg
);
287 expr
= pet_expr_alloc(ctx
, pet_expr_op
);
288 expr
= pet_expr_set_n_arg(expr
, 1);
293 expr
->args
[pet_un_arg
] = arg
;
301 /* Construct a binary pet_expr that performs "op" on "lhs" and "rhs",
302 * where the result is represented using a type of "type_size" bits
303 * (may be zero if unknown or if the type is not an integer).
305 __isl_give pet_expr
*pet_expr_new_binary(int type_size
, enum pet_op_type op
,
306 __isl_take pet_expr
*lhs
, __isl_take pet_expr
*rhs
)
313 ctx
= pet_expr_get_ctx(lhs
);
314 expr
= pet_expr_alloc(ctx
, pet_expr_op
);
315 expr
= pet_expr_set_n_arg(expr
, 2);
320 expr
->type_size
= type_size
;
321 expr
->args
[pet_bin_lhs
] = lhs
;
322 expr
->args
[pet_bin_rhs
] = rhs
;
331 /* Construct a ternary pet_expr that performs "cond" ? "lhs" : "rhs".
333 __isl_give pet_expr
*pet_expr_new_ternary(__isl_take pet_expr
*cond
,
334 __isl_take pet_expr
*lhs
, __isl_take pet_expr
*rhs
)
339 if (!cond
|| !lhs
|| !rhs
)
341 ctx
= pet_expr_get_ctx(cond
);
342 expr
= pet_expr_alloc(ctx
, pet_expr_op
);
343 expr
= pet_expr_set_n_arg(expr
, 3);
347 expr
->op
= pet_op_cond
;
348 expr
->args
[pet_ter_cond
] = cond
;
349 expr
->args
[pet_ter_true
] = lhs
;
350 expr
->args
[pet_ter_false
] = rhs
;
360 /* Construct a call pet_expr that calls function "name" with "n_arg"
361 * arguments. The caller is responsible for filling in the arguments.
363 __isl_give pet_expr
*pet_expr_new_call(isl_ctx
*ctx
, const char *name
,
368 expr
= pet_expr_alloc(ctx
, pet_expr_call
);
369 expr
= pet_expr_set_n_arg(expr
, n_arg
);
373 expr
->name
= strdup(name
);
375 return pet_expr_free(expr
);
380 /* Construct a pet_expr that represents the cast of "arg" to "type_name".
382 __isl_give pet_expr
*pet_expr_new_cast(const char *type_name
,
383 __isl_take pet_expr
*arg
)
391 ctx
= pet_expr_get_ctx(arg
);
392 expr
= pet_expr_alloc(ctx
, pet_expr_cast
);
393 expr
= pet_expr_set_n_arg(expr
, 1);
397 expr
->type_name
= strdup(type_name
);
398 if (!expr
->type_name
)
410 /* Construct a pet_expr that represents the double "d".
412 __isl_give pet_expr
*pet_expr_new_double(isl_ctx
*ctx
,
413 double val
, const char *s
)
417 expr
= pet_expr_alloc(ctx
, pet_expr_double
);
422 expr
->d
.s
= strdup(s
);
424 return pet_expr_free(expr
);
429 /* Construct a pet_expr that represents the integer value "v".
431 __isl_give pet_expr
*pet_expr_new_int(__isl_take isl_val
*v
)
439 ctx
= isl_val_get_ctx(v
);
440 expr
= pet_expr_alloc(ctx
, pet_expr_int
);
452 static __isl_give pet_expr
*pet_expr_dup(__isl_keep pet_expr
*expr
)
460 dup
= pet_expr_alloc(expr
->ctx
, expr
->type
);
461 dup
= pet_expr_set_type_size(dup
, expr
->type_size
);
462 dup
= pet_expr_set_n_arg(dup
, expr
->n_arg
);
463 for (i
= 0; i
< expr
->n_arg
; ++i
)
464 dup
= pet_expr_set_arg(dup
, i
, pet_expr_copy(expr
->args
[i
]));
466 switch (expr
->type
) {
467 case pet_expr_access
:
468 if (expr
->acc
.ref_id
)
469 dup
= pet_expr_access_set_ref_id(dup
,
470 isl_id_copy(expr
->acc
.ref_id
));
471 dup
= pet_expr_access_set_access(dup
,
472 isl_map_copy(expr
->acc
.access
));
473 dup
= pet_expr_access_set_index(dup
,
474 isl_multi_pw_aff_copy(expr
->acc
.index
));
475 dup
= pet_expr_access_set_read(dup
, expr
->acc
.read
);
476 dup
= pet_expr_access_set_write(dup
, expr
->acc
.write
);
479 dup
= pet_expr_call_set_name(dup
, expr
->name
);
482 dup
= pet_expr_cast_set_type_name(dup
, expr
->type_name
);
484 case pet_expr_double
:
485 dup
= pet_expr_double_set(dup
, expr
->d
.val
, expr
->d
.s
);
488 dup
= pet_expr_int_set_val(dup
, isl_val_copy(expr
->i
));
491 dup
= pet_expr_op_set_type(dup
, expr
->op
);
494 dup
= pet_expr_free(dup
);
501 __isl_give pet_expr
*pet_expr_cow(__isl_take pet_expr
*expr
)
509 return pet_expr_dup(expr
);
512 __isl_null pet_expr
*pet_expr_free(__isl_take pet_expr
*expr
)
521 for (i
= 0; i
< expr
->n_arg
; ++i
)
522 pet_expr_free(expr
->args
[i
]);
525 switch (expr
->type
) {
526 case pet_expr_access
:
527 isl_id_free(expr
->acc
.ref_id
);
528 isl_map_free(expr
->acc
.access
);
529 isl_multi_pw_aff_free(expr
->acc
.index
);
535 free(expr
->type_name
);
537 case pet_expr_double
:
541 isl_val_free(expr
->i
);
548 isl_ctx_deref(expr
->ctx
);
553 /* Return an additional reference to "expr".
555 __isl_give pet_expr
*pet_expr_copy(__isl_keep pet_expr
*expr
)
564 /* Return the isl_ctx in which "expr" was created.
566 isl_ctx
*pet_expr_get_ctx(__isl_keep pet_expr
*expr
)
568 return expr
? expr
->ctx
: NULL
;
571 /* Return the type of "expr".
573 enum pet_expr_type
pet_expr_get_type(__isl_keep pet_expr
*expr
)
576 return pet_expr_error
;
580 /* Return the number of arguments of "expr".
582 int pet_expr_get_n_arg(__isl_keep pet_expr
*expr
)
590 /* Set the number of arguments of "expr" to "n".
592 * If "expr" originally had more arguments, then remove the extra arguments.
593 * If "expr" originally had fewer arguments, then create space for
594 * the extra arguments ans initialize them to NULL.
596 __isl_give pet_expr
*pet_expr_set_n_arg(__isl_take pet_expr
*expr
, int n
)
603 if (expr
->n_arg
== n
)
605 expr
= pet_expr_cow(expr
);
609 if (n
< expr
->n_arg
) {
610 for (i
= n
; i
< expr
->n_arg
; ++i
)
611 pet_expr_free(expr
->args
[i
]);
616 args
= isl_realloc_array(expr
->ctx
, expr
->args
, pet_expr
*, n
);
618 return pet_expr_free(expr
);
620 for (i
= expr
->n_arg
; i
< n
; ++i
)
621 expr
->args
[i
] = NULL
;
627 /* Return the argument of "expr" at position "pos".
629 __isl_give pet_expr
*pet_expr_get_arg(__isl_keep pet_expr
*expr
, int pos
)
633 if (pos
< 0 || pos
>= expr
->n_arg
)
634 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
635 "position out of bounds", return NULL
);
637 return pet_expr_copy(expr
->args
[pos
]);
640 /* Replace the argument of "expr" at position "pos" by "arg".
642 __isl_give pet_expr
*pet_expr_set_arg(__isl_take pet_expr
*expr
, int pos
,
643 __isl_take pet_expr
*arg
)
647 if (pos
< 0 || pos
>= expr
->n_arg
)
648 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
649 "position out of bounds", goto error
);
650 if (expr
->args
[pos
] == arg
) {
655 expr
= pet_expr_cow(expr
);
659 pet_expr_free(expr
->args
[pos
]);
660 expr
->args
[pos
] = arg
;
669 /* Does "expr" perform a comparison operation?
671 int pet_expr_is_comparison(__isl_keep pet_expr
*expr
)
675 if (expr
->type
!= pet_expr_op
)
690 /* Does "expr" perform a boolean operation?
692 int pet_expr_is_boolean(__isl_keep pet_expr
*expr
)
696 if (expr
->type
!= pet_expr_op
)
708 /* Does "expr" perform a min operation?
710 int pet_expr_is_min(__isl_keep pet_expr
*expr
)
714 if (expr
->type
!= pet_expr_call
)
716 if (expr
->n_arg
!= 2)
718 if (strcmp(expr
->name
, "min") != 0)
723 /* Does "expr" perform a max operation?
725 int pet_expr_is_max(__isl_keep pet_expr
*expr
)
729 if (expr
->type
!= pet_expr_call
)
731 if (expr
->n_arg
!= 2)
733 if (strcmp(expr
->name
, "max") != 0)
738 /* Does "expr" represent an access to an unnamed space, i.e.,
739 * does it represent an affine expression?
741 int pet_expr_is_affine(__isl_keep pet_expr
*expr
)
747 if (expr
->type
!= pet_expr_access
)
750 has_id
= isl_map_has_tuple_id(expr
->acc
.access
, isl_dim_out
);
757 /* Does "expr" represent an access to a scalar, i.e., a zero-dimensional array,
758 * not part of any struct?
760 int pet_expr_is_scalar_access(__isl_keep pet_expr
*expr
)
764 if (expr
->type
!= pet_expr_access
)
766 if (isl_map_range_is_wrapping(expr
->acc
.access
))
769 return isl_map_dim(expr
->acc
.access
, isl_dim_out
) == 0;
772 /* Return 1 if the two pet_exprs are equivalent.
774 int pet_expr_is_equal(__isl_keep pet_expr
*expr1
, __isl_keep pet_expr
*expr2
)
778 if (!expr1
|| !expr2
)
781 if (expr1
->type
!= expr2
->type
)
783 if (expr1
->n_arg
!= expr2
->n_arg
)
785 for (i
= 0; i
< expr1
->n_arg
; ++i
)
786 if (!pet_expr_is_equal(expr1
->args
[i
], expr2
->args
[i
]))
788 switch (expr1
->type
) {
791 case pet_expr_double
:
792 if (strcmp(expr1
->d
.s
, expr2
->d
.s
))
794 if (expr1
->d
.val
!= expr2
->d
.val
)
798 if (!isl_val_eq(expr1
->i
, expr2
->i
))
801 case pet_expr_access
:
802 if (expr1
->acc
.read
!= expr2
->acc
.read
)
804 if (expr1
->acc
.write
!= expr2
->acc
.write
)
806 if (expr1
->acc
.ref_id
!= expr2
->acc
.ref_id
)
808 if (!expr1
->acc
.access
|| !expr2
->acc
.access
)
810 if (!isl_map_is_equal(expr1
->acc
.access
, expr2
->acc
.access
))
812 if (!expr1
->acc
.index
|| !expr2
->acc
.index
)
814 if (!isl_multi_pw_aff_plain_is_equal(expr1
->acc
.index
,
819 if (expr1
->op
!= expr2
->op
)
823 if (strcmp(expr1
->name
, expr2
->name
))
827 if (strcmp(expr1
->type_name
, expr2
->type_name
))
835 /* Does the access expression "expr" read the accessed elements?
837 int pet_expr_access_is_read(__isl_keep pet_expr
*expr
)
841 if (expr
->type
!= pet_expr_access
)
842 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
843 "not an access expression", return -1);
845 return expr
->acc
.read
;
848 /* Does the access expression "expr" write to the accessed elements?
850 int pet_expr_access_is_write(__isl_keep pet_expr
*expr
)
854 if (expr
->type
!= pet_expr_access
)
855 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
856 "not an access expression", return -1);
858 return expr
->acc
.write
;
861 /* Return the identifier of the array accessed by "expr".
863 * If "expr" represents a member access, then return the identifier
864 * of the outer structure array.
866 __isl_give isl_id
*pet_expr_access_get_id(__isl_keep pet_expr
*expr
)
870 if (expr
->type
!= pet_expr_access
)
871 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
872 "not an access expression", return NULL
);
874 if (isl_map_range_is_wrapping(expr
->acc
.access
)) {
878 space
= isl_map_get_space(expr
->acc
.access
);
879 space
= isl_space_range(space
);
880 while (space
&& isl_space_is_wrapping(space
))
881 space
= isl_space_domain(isl_space_unwrap(space
));
882 id
= isl_space_get_tuple_id(space
, isl_dim_set
);
883 isl_space_free(space
);
888 return isl_map_get_tuple_id(expr
->acc
.access
, isl_dim_out
);
891 /* Return the parameter space of "expr".
893 __isl_give isl_space
*pet_expr_access_get_parameter_space(
894 __isl_keep pet_expr
*expr
)
900 if (expr
->type
!= pet_expr_access
)
901 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
902 "not an access expression", return NULL
);
904 space
= isl_multi_pw_aff_get_space(expr
->acc
.index
);
905 space
= isl_space_params(space
);
910 /* Return the space of the data accessed by "expr".
912 __isl_give isl_space
*pet_expr_access_get_data_space(__isl_keep pet_expr
*expr
)
918 if (expr
->type
!= pet_expr_access
)
919 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
920 "not an access expression", return NULL
);
922 space
= isl_multi_pw_aff_get_space(expr
->acc
.index
);
923 space
= isl_space_range(space
);
928 /* Modify all expressions of type pet_expr_access in "expr"
929 * by calling "fn" on them.
931 __isl_give pet_expr
*pet_expr_map_access(__isl_take pet_expr
*expr
,
932 __isl_give pet_expr
*(*fn
)(__isl_take pet_expr
*expr
, void *user
),
937 n
= pet_expr_get_n_arg(expr
);
938 for (i
= 0; i
< n
; ++i
) {
939 pet_expr
*arg
= pet_expr_get_arg(expr
, i
);
940 arg
= pet_expr_map_access(arg
, fn
, user
);
941 expr
= pet_expr_set_arg(expr
, i
, arg
);
947 if (expr
->type
== pet_expr_access
)
948 expr
= fn(expr
, user
);
953 /* Call "fn" on each of the subexpressions of "expr" of type "type".
955 * Return -1 on error (where fn returning a negative value is treated as
957 * Otherwise return 0.
959 int pet_expr_foreach_expr_of_type(__isl_keep pet_expr
*expr
,
960 enum pet_expr_type type
,
961 int (*fn
)(__isl_keep pet_expr
*expr
, void *user
), void *user
)
968 for (i
= 0; i
< expr
->n_arg
; ++i
)
969 if (pet_expr_foreach_expr_of_type(expr
->args
[i
],
973 if (expr
->type
== type
)
974 return fn(expr
, user
);
979 /* Call "fn" on each of the subexpressions of "expr" of type pet_expr_access.
981 * Return -1 on error (where fn returning a negative value is treated as
983 * Otherwise return 0.
985 int pet_expr_foreach_access_expr(__isl_keep pet_expr
*expr
,
986 int (*fn
)(__isl_keep pet_expr
*expr
, void *user
), void *user
)
988 return pet_expr_foreach_expr_of_type(expr
, pet_expr_access
, fn
, user
);
991 /* Call "fn" on each of the subexpressions of "expr" of type pet_expr_call.
993 * Return -1 on error (where fn returning a negative value is treated as
995 * Otherwise return 0.
997 int pet_expr_foreach_call_expr(__isl_keep pet_expr
*expr
,
998 int (*fn
)(__isl_keep pet_expr
*expr
, void *user
), void *user
)
1000 return pet_expr_foreach_expr_of_type(expr
, pet_expr_call
, fn
, user
);
1003 /* Internal data structure for pet_expr_writes.
1004 * "id" is the identifier that we are looking for.
1005 * "found" is set if we have found the identifier being written to.
1007 struct pet_expr_writes_data
{
1012 /* Given an access expression, check if it writes to data->id.
1013 * If so, set data->found and abort the search.
1015 static int writes(__isl_keep pet_expr
*expr
, void *user
)
1017 struct pet_expr_writes_data
*data
= user
;
1020 if (!expr
->acc
.write
)
1022 if (pet_expr_is_affine(expr
))
1025 write_id
= pet_expr_access_get_id(expr
);
1026 isl_id_free(write_id
);
1031 if (write_id
!= data
->id
)
1038 /* Does expression "expr" write to "id"?
1040 int pet_expr_writes(__isl_keep pet_expr
*expr
, __isl_keep isl_id
*id
)
1042 struct pet_expr_writes_data data
;
1046 if (pet_expr_foreach_access_expr(expr
, &writes
, &data
) < 0 &&
1053 /* Move the "n" dimensions of "src_type" starting at "src_pos" of
1054 * index expression and access relation of "expr"
1055 * to dimensions of "dst_type" at "dst_pos".
1057 __isl_give pet_expr
*pet_expr_access_move_dims(__isl_take pet_expr
*expr
,
1058 enum isl_dim_type dst_type
, unsigned dst_pos
,
1059 enum isl_dim_type src_type
, unsigned src_pos
, unsigned n
)
1061 expr
= pet_expr_cow(expr
);
1064 if (expr
->type
!= pet_expr_access
)
1065 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1066 "not an access pet_expr", return pet_expr_free(expr
));
1068 expr
->acc
.access
= isl_map_move_dims(expr
->acc
.access
,
1069 dst_type
, dst_pos
, src_type
, src_pos
, n
);
1070 expr
->acc
.index
= isl_multi_pw_aff_move_dims(expr
->acc
.index
,
1071 dst_type
, dst_pos
, src_type
, src_pos
, n
);
1072 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1073 return pet_expr_free(expr
);
1078 /* Replace the index expression and access relation of "expr"
1079 * by their preimages under the function represented by "ma".
1081 __isl_give pet_expr
*pet_expr_access_pullback_multi_aff(
1082 __isl_take pet_expr
*expr
, __isl_take isl_multi_aff
*ma
)
1084 expr
= pet_expr_cow(expr
);
1087 if (expr
->type
!= pet_expr_access
)
1088 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1089 "not an access pet_expr", goto error
);
1091 expr
->acc
.access
= isl_map_preimage_domain_multi_aff(expr
->acc
.access
,
1092 isl_multi_aff_copy(ma
));
1093 expr
->acc
.index
= isl_multi_pw_aff_pullback_multi_aff(expr
->acc
.index
,
1095 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1096 return pet_expr_free(expr
);
1100 isl_multi_aff_free(ma
);
1101 pet_expr_free(expr
);
1105 /* Replace the index expression and access relation of "expr"
1106 * by their preimages under the function represented by "mpa".
1108 __isl_give pet_expr
*pet_expr_access_pullback_multi_pw_aff(
1109 __isl_take pet_expr
*expr
, __isl_take isl_multi_pw_aff
*mpa
)
1111 expr
= pet_expr_cow(expr
);
1114 if (expr
->type
!= pet_expr_access
)
1115 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1116 "not an access pet_expr", goto error
);
1118 expr
->acc
.access
= isl_map_preimage_domain_multi_pw_aff(
1119 expr
->acc
.access
, isl_multi_pw_aff_copy(mpa
));
1120 expr
->acc
.index
= isl_multi_pw_aff_pullback_multi_pw_aff(
1121 expr
->acc
.index
, mpa
);
1122 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1123 return pet_expr_free(expr
);
1127 isl_multi_pw_aff_free(mpa
);
1128 pet_expr_free(expr
);
1132 /* Return the access relation of access expression "expr".
1134 __isl_give isl_map
*pet_expr_access_get_access(__isl_keep pet_expr
*expr
)
1138 if (expr
->type
!= pet_expr_access
)
1139 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1140 "not an access expression", return NULL
);
1142 return isl_map_copy(expr
->acc
.access
);
1145 /* Return the index expression of access expression "expr".
1147 __isl_give isl_multi_pw_aff
*pet_expr_access_get_index(
1148 __isl_keep pet_expr
*expr
)
1152 if (expr
->type
!= pet_expr_access
)
1153 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1154 "not an access expression", return NULL
);
1156 return isl_multi_pw_aff_copy(expr
->acc
.index
);
1159 /* Align the parameters of expr->acc.index and expr->acc.access.
1161 __isl_give pet_expr
*pet_expr_access_align_params(__isl_take pet_expr
*expr
)
1163 expr
= pet_expr_cow(expr
);
1166 if (expr
->type
!= pet_expr_access
)
1167 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1168 "not an access expression", return pet_expr_free(expr
));
1170 expr
->acc
.access
= isl_map_align_params(expr
->acc
.access
,
1171 isl_multi_pw_aff_get_space(expr
->acc
.index
));
1172 expr
->acc
.index
= isl_multi_pw_aff_align_params(expr
->acc
.index
,
1173 isl_map_get_space(expr
->acc
.access
));
1174 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1175 return pet_expr_free(expr
);
1180 /* Add extra conditions on the parameters to all access relations in "expr".
1182 * The conditions are not added to the index expression. Instead, they
1183 * are used to try and simplify the index expression.
1185 __isl_give pet_expr
*pet_expr_restrict(__isl_take pet_expr
*expr
,
1186 __isl_take isl_set
*cond
)
1190 expr
= pet_expr_cow(expr
);
1194 for (i
= 0; i
< expr
->n_arg
; ++i
) {
1195 expr
->args
[i
] = pet_expr_restrict(expr
->args
[i
],
1196 isl_set_copy(cond
));
1201 if (expr
->type
== pet_expr_access
) {
1202 expr
->acc
.access
= isl_map_intersect_params(expr
->acc
.access
,
1203 isl_set_copy(cond
));
1204 expr
->acc
.index
= isl_multi_pw_aff_gist_params(
1205 expr
->acc
.index
, isl_set_copy(cond
));
1206 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1214 return pet_expr_free(expr
);
1217 /* Modify the access relation and index expression
1218 * of the given access expression
1219 * based on the given iteration space transformation.
1220 * In particular, precompose the access relation and index expression
1221 * with the update function.
1223 * If the access has any arguments then the domain of the access relation
1224 * is a wrapped mapping from the iteration space to the space of
1225 * argument values. We only need to change the domain of this wrapped
1226 * mapping, so we extend the input transformation with an identity mapping
1227 * on the space of argument values.
1229 __isl_give pet_expr
*pet_expr_access_update_domain(__isl_take pet_expr
*expr
,
1230 __isl_keep isl_multi_pw_aff
*update
)
1234 expr
= pet_expr_cow(expr
);
1237 if (expr
->type
!= pet_expr_access
)
1238 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1239 "not an access expression", return pet_expr_free(expr
));
1241 update
= isl_multi_pw_aff_copy(update
);
1243 space
= isl_map_get_space(expr
->acc
.access
);
1244 space
= isl_space_domain(space
);
1245 if (!isl_space_is_wrapping(space
))
1246 isl_space_free(space
);
1248 isl_multi_pw_aff
*id
;
1249 space
= isl_space_unwrap(space
);
1250 space
= isl_space_range(space
);
1251 space
= isl_space_map_from_set(space
);
1252 id
= isl_multi_pw_aff_identity(space
);
1253 update
= isl_multi_pw_aff_product(update
, id
);
1256 expr
->acc
.access
= isl_map_preimage_domain_multi_pw_aff(
1258 isl_multi_pw_aff_copy(update
));
1259 expr
->acc
.index
= isl_multi_pw_aff_pullback_multi_pw_aff(
1260 expr
->acc
.index
, update
);
1261 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1262 return pet_expr_free(expr
);
1267 static __isl_give pet_expr
*update_domain(__isl_take pet_expr
*expr
, void *user
)
1269 isl_multi_pw_aff
*update
= user
;
1271 return pet_expr_access_update_domain(expr
, update
);
1274 /* Modify all access relations in "expr" by precomposing them with
1275 * the given iteration space transformation.
1277 __isl_give pet_expr
*pet_expr_update_domain(__isl_take pet_expr
*expr
,
1278 __isl_take isl_multi_pw_aff
*update
)
1280 expr
= pet_expr_map_access(expr
, &update_domain
, update
);
1281 isl_multi_pw_aff_free(update
);
1285 /* Add all parameters in "space" to the access relation and index expression
1288 static __isl_give pet_expr
*align_params(__isl_take pet_expr
*expr
, void *user
)
1290 isl_space
*space
= user
;
1292 expr
= pet_expr_cow(expr
);
1295 if (expr
->type
!= pet_expr_access
)
1296 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1297 "not an access expression", return pet_expr_free(expr
));
1299 expr
->acc
.access
= isl_map_align_params(expr
->acc
.access
,
1300 isl_space_copy(space
));
1301 expr
->acc
.index
= isl_multi_pw_aff_align_params(expr
->acc
.index
,
1302 isl_space_copy(space
));
1303 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1304 return pet_expr_free(expr
);
1309 /* Add all parameters in "space" to all access relations and index expressions
1312 __isl_give pet_expr
*pet_expr_align_params(__isl_take pet_expr
*expr
,
1313 __isl_take isl_space
*space
)
1315 expr
= pet_expr_map_access(expr
, &align_params
, space
);
1316 isl_space_free(space
);
1320 /* Insert an argument expression corresponding to "test" in front
1321 * of the list of arguments described by *n_arg and *args.
1323 static __isl_give pet_expr
*insert_access_arg(__isl_take pet_expr
*expr
,
1324 __isl_keep isl_multi_pw_aff
*test
)
1327 isl_ctx
*ctx
= isl_multi_pw_aff_get_ctx(test
);
1330 return pet_expr_free(expr
);
1331 expr
= pet_expr_cow(expr
);
1336 expr
->args
= isl_calloc_array(ctx
, pet_expr
*, 1);
1338 return pet_expr_free(expr
);
1341 ext
= isl_calloc_array(ctx
, pet_expr
*, 1 + expr
->n_arg
);
1343 return pet_expr_free(expr
);
1344 for (i
= 0; i
< expr
->n_arg
; ++i
)
1345 ext
[1 + i
] = expr
->args
[i
];
1350 expr
->args
[0] = pet_expr_from_index(isl_multi_pw_aff_copy(test
));
1352 return pet_expr_free(expr
);
1357 /* Make the expression "expr" depend on the value of "test"
1358 * being equal to "satisfied".
1360 * If "test" is an affine expression, we simply add the conditions
1361 * on the expression having the value "satisfied" to all access relations
1362 * and index expressions.
1364 * Otherwise, we add a filter to "expr" (which is then assumed to be
1365 * an access expression) corresponding to "test" being equal to "satisfied".
1367 __isl_give pet_expr
*pet_expr_filter(__isl_take pet_expr
*expr
,
1368 __isl_take isl_multi_pw_aff
*test
, int satisfied
)
1373 isl_pw_multi_aff
*pma
;
1375 expr
= pet_expr_cow(expr
);
1379 if (!isl_multi_pw_aff_has_tuple_id(test
, isl_dim_out
)) {
1383 pa
= isl_multi_pw_aff_get_pw_aff(test
, 0);
1384 isl_multi_pw_aff_free(test
);
1386 cond
= isl_pw_aff_non_zero_set(pa
);
1388 cond
= isl_pw_aff_zero_set(pa
);
1389 return pet_expr_restrict(expr
, isl_set_params(cond
));
1392 ctx
= isl_multi_pw_aff_get_ctx(test
);
1393 if (expr
->type
!= pet_expr_access
)
1394 isl_die(ctx
, isl_error_invalid
,
1395 "can only filter access expressions", goto error
);
1397 space
= isl_space_domain(isl_map_get_space(expr
->acc
.access
));
1398 id
= isl_multi_pw_aff_get_tuple_id(test
, isl_dim_out
);
1399 pma
= pet_filter_insert_pma(space
, id
, satisfied
);
1401 expr
->acc
.access
= isl_map_preimage_domain_pw_multi_aff(
1403 isl_pw_multi_aff_copy(pma
));
1404 expr
->acc
.index
= isl_multi_pw_aff_pullback_pw_multi_aff(
1405 expr
->acc
.index
, pma
);
1406 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1409 expr
= insert_access_arg(expr
, test
);
1411 isl_multi_pw_aff_free(test
);
1414 isl_multi_pw_aff_free(test
);
1415 return pet_expr_free(expr
);
1418 /* Check if the given index expression accesses a (0D) array that corresponds
1419 * to one of the parameters in "space". If so, replace the array access
1420 * by an access to the set of integers with as index (and value)
1423 static __isl_give isl_multi_pw_aff
*index_detect_parameter(
1424 __isl_take isl_multi_pw_aff
*index
, __isl_take isl_space
*space
)
1426 isl_local_space
*ls
;
1427 isl_id
*array_id
= NULL
;
1431 if (isl_multi_pw_aff_has_tuple_id(index
, isl_dim_out
)) {
1432 array_id
= isl_multi_pw_aff_get_tuple_id(index
, isl_dim_out
);
1433 pos
= isl_space_find_dim_by_id(space
, isl_dim_param
, array_id
);
1435 isl_space_free(space
);
1438 isl_id_free(array_id
);
1442 space
= isl_multi_pw_aff_get_domain_space(index
);
1443 isl_multi_pw_aff_free(index
);
1445 pos
= isl_space_find_dim_by_id(space
, isl_dim_param
, array_id
);
1447 space
= isl_space_insert_dims(space
, isl_dim_param
, 0, 1);
1448 space
= isl_space_set_dim_id(space
, isl_dim_param
, 0, array_id
);
1451 isl_id_free(array_id
);
1453 ls
= isl_local_space_from_space(space
);
1454 aff
= isl_aff_var_on_domain(ls
, isl_dim_param
, pos
);
1455 index
= isl_multi_pw_aff_from_pw_aff(isl_pw_aff_from_aff(aff
));
1460 /* Check if the given access relation accesses a (0D) array that corresponds
1461 * to one of the parameters in "space". If so, replace the array access
1462 * by an access to the set of integers with as index (and value)
1465 static __isl_give isl_map
*access_detect_parameter(__isl_take isl_map
*access
,
1466 __isl_take isl_space
*space
)
1468 isl_id
*array_id
= NULL
;
1471 if (isl_map_has_tuple_id(access
, isl_dim_out
)) {
1472 array_id
= isl_map_get_tuple_id(access
, isl_dim_out
);
1473 pos
= isl_space_find_dim_by_id(space
, isl_dim_param
, array_id
);
1475 isl_space_free(space
);
1478 isl_id_free(array_id
);
1482 pos
= isl_map_find_dim_by_id(access
, isl_dim_param
, array_id
);
1484 access
= isl_map_insert_dims(access
, isl_dim_param
, 0, 1);
1485 access
= isl_map_set_dim_id(access
, isl_dim_param
, 0, array_id
);
1488 isl_id_free(array_id
);
1490 access
= isl_map_insert_dims(access
, isl_dim_out
, 0, 1);
1491 access
= isl_map_equate(access
, isl_dim_param
, pos
, isl_dim_out
, 0);
1496 /* If "expr" accesses a (0D) array that corresponds to one of the parameters
1497 * in "space" then replace it by a value equal to the corresponding parameter.
1499 static __isl_give pet_expr
*detect_parameter_accesses(__isl_take pet_expr
*expr
,
1502 isl_space
*space
= user
;
1504 expr
= pet_expr_cow(expr
);
1507 if (expr
->type
!= pet_expr_access
)
1508 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1509 "not an access expression", return pet_expr_free(expr
));
1511 expr
->acc
.access
= access_detect_parameter(expr
->acc
.access
,
1512 isl_space_copy(space
));
1513 expr
->acc
.index
= index_detect_parameter(expr
->acc
.index
,
1514 isl_space_copy(space
));
1515 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1516 return pet_expr_free(expr
);
1521 /* Replace all accesses to (0D) arrays that correspond to one of the parameters
1522 * in "space" by a value equal to the corresponding parameter.
1524 __isl_give pet_expr
*pet_expr_detect_parameter_accesses(
1525 __isl_take pet_expr
*expr
, __isl_take isl_space
*space
)
1527 expr
= pet_expr_map_access(expr
, &detect_parameter_accesses
, space
);
1528 isl_space_free(space
);
1532 /* Add a reference identifier to access expression "expr".
1533 * "user" points to an integer that contains the sequence number
1534 * of the next reference.
1536 static __isl_give pet_expr
*access_add_ref_id(__isl_take pet_expr
*expr
,
1543 expr
= pet_expr_cow(expr
);
1546 if (expr
->type
!= pet_expr_access
)
1547 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1548 "not an access expression", return pet_expr_free(expr
));
1550 ctx
= isl_map_get_ctx(expr
->acc
.access
);
1551 snprintf(name
, sizeof(name
), "__pet_ref_%d", (*n_ref
)++);
1552 expr
->acc
.ref_id
= isl_id_alloc(ctx
, name
, NULL
);
1553 if (!expr
->acc
.ref_id
)
1554 return pet_expr_free(expr
);
1559 __isl_give pet_expr
*pet_expr_add_ref_ids(__isl_take pet_expr
*expr
, int *n_ref
)
1561 return pet_expr_map_access(expr
, &access_add_ref_id
, n_ref
);
1564 /* Reset the user pointer on all parameter and tuple ids in
1565 * the access relation and the index expressions
1566 * of the access expression "expr".
1568 static __isl_give pet_expr
*access_anonymize(__isl_take pet_expr
*expr
,
1571 expr
= pet_expr_cow(expr
);
1574 if (expr
->type
!= pet_expr_access
)
1575 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1576 "not an access expression", return pet_expr_free(expr
));
1578 expr
->acc
.access
= isl_map_reset_user(expr
->acc
.access
);
1579 expr
->acc
.index
= isl_multi_pw_aff_reset_user(expr
->acc
.index
);
1580 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1581 return pet_expr_free(expr
);
1586 __isl_give pet_expr
*pet_expr_anonymize(__isl_take pet_expr
*expr
)
1588 return pet_expr_map_access(expr
, &access_anonymize
, NULL
);
1591 /* Data used in access_gist() callback.
1593 struct pet_access_gist_data
{
1595 isl_union_map
*value_bounds
;
1598 /* Given an expression "expr" of type pet_expr_access, compute
1599 * the gist of the associated access relation and index expression
1600 * with respect to data->domain and the bounds on the values of the arguments
1601 * of the expression.
1603 * The arguments of "expr" have been gisted right before "expr" itself
1604 * is gisted. The gisted arguments may have become equal where before
1605 * they may not have been (obviously) equal. We therefore take
1606 * the opportunity to remove duplicate arguments here.
1608 static __isl_give pet_expr
*access_gist(__isl_take pet_expr
*expr
, void *user
)
1610 struct pet_access_gist_data
*data
= user
;
1613 expr
= pet_expr_remove_duplicate_args(expr
);
1614 expr
= pet_expr_cow(expr
);
1617 if (expr
->type
!= pet_expr_access
)
1618 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1619 "not an access expression", return pet_expr_free(expr
));
1621 domain
= isl_set_copy(data
->domain
);
1622 if (expr
->n_arg
> 0)
1623 domain
= pet_value_bounds_apply(domain
, expr
->n_arg
, expr
->args
,
1624 data
->value_bounds
);
1626 expr
->acc
.access
= isl_map_gist_domain(expr
->acc
.access
,
1627 isl_set_copy(domain
));
1628 expr
->acc
.index
= isl_multi_pw_aff_gist(expr
->acc
.index
, domain
);
1629 if (!expr
->acc
.access
|| !expr
->acc
.index
)
1630 return pet_expr_free(expr
);
1635 __isl_give pet_expr
*pet_expr_gist(__isl_take pet_expr
*expr
,
1636 __isl_keep isl_set
*context
, __isl_keep isl_union_map
*value_bounds
)
1638 struct pet_access_gist_data data
= { context
, value_bounds
};
1640 return pet_expr_map_access(expr
, &access_gist
, &data
);
1643 /* Mark "expr" as a read dependening on "read".
1645 __isl_give pet_expr
*pet_expr_access_set_read(__isl_take pet_expr
*expr
,
1649 return pet_expr_free(expr
);
1650 if (expr
->type
!= pet_expr_access
)
1651 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1652 "not an access expression", return pet_expr_free(expr
));
1653 if (expr
->acc
.read
== read
)
1655 expr
= pet_expr_cow(expr
);
1658 expr
->acc
.read
= read
;
1663 /* Mark "expr" as a write dependening on "write".
1665 __isl_give pet_expr
*pet_expr_access_set_write(__isl_take pet_expr
*expr
,
1669 return pet_expr_free(expr
);
1670 if (expr
->type
!= pet_expr_access
)
1671 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1672 "not an access expression", return pet_expr_free(expr
));
1673 if (expr
->acc
.write
== write
)
1675 expr
= pet_expr_cow(expr
);
1678 expr
->acc
.write
= write
;
1683 /* Replace the access relation of "expr" by "access".
1685 __isl_give pet_expr
*pet_expr_access_set_access(__isl_take pet_expr
*expr
,
1686 __isl_take isl_map
*access
)
1688 expr
= pet_expr_cow(expr
);
1689 if (!expr
|| !access
)
1691 if (expr
->type
!= pet_expr_access
)
1692 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1693 "not an access expression", goto error
);
1694 isl_map_free(expr
->acc
.access
);
1695 expr
->acc
.access
= access
;
1699 isl_map_free(access
);
1700 pet_expr_free(expr
);
1704 /* Replace the index expression of "expr" by "index".
1706 __isl_give pet_expr
*pet_expr_access_set_index(__isl_take pet_expr
*expr
,
1707 __isl_take isl_multi_pw_aff
*index
)
1709 expr
= pet_expr_cow(expr
);
1710 if (!expr
|| !index
)
1712 if (expr
->type
!= pet_expr_access
)
1713 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1714 "not an access expression", goto error
);
1715 isl_multi_pw_aff_free(expr
->acc
.index
);
1716 expr
->acc
.index
= index
;
1720 isl_multi_pw_aff_free(index
);
1721 pet_expr_free(expr
);
1725 /* Return the reference identifier of access expression "expr".
1727 __isl_give isl_id
*pet_expr_access_get_ref_id(__isl_keep pet_expr
*expr
)
1731 if (expr
->type
!= pet_expr_access
)
1732 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1733 "not an access expression", return NULL
);
1735 return isl_id_copy(expr
->acc
.ref_id
);
1738 /* Replace the reference identifier of access expression "expr" by "ref_id".
1740 __isl_give pet_expr
*pet_expr_access_set_ref_id(__isl_take pet_expr
*expr
,
1741 __isl_take isl_id
*ref_id
)
1743 expr
= pet_expr_cow(expr
);
1744 if (!expr
|| !ref_id
)
1746 if (expr
->type
!= pet_expr_access
)
1747 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1748 "not an access expression", goto error
);
1749 isl_id_free(expr
->acc
.ref_id
);
1750 expr
->acc
.ref_id
= ref_id
;
1754 isl_id_free(ref_id
);
1755 pet_expr_free(expr
);
1759 /* Tag the access relation "access" with "id".
1760 * That is, insert the id as the range of a wrapped relation
1761 * in the domain of "access".
1763 * If "access" is of the form
1767 * then the result is of the form
1769 * [D[i] -> id[]] -> A[a]
1771 __isl_give isl_map
*pet_expr_tag_access(__isl_keep pet_expr
*expr
,
1772 __isl_take isl_map
*access
)
1778 if (expr
->type
!= pet_expr_access
)
1779 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1780 "not an access expression",
1781 return isl_map_free(access
));
1783 id
= isl_id_copy(expr
->acc
.ref_id
);
1784 space
= isl_space_range(isl_map_get_space(access
));
1785 space
= isl_space_from_range(space
);
1786 space
= isl_space_set_tuple_id(space
, isl_dim_in
, id
);
1787 add_tag
= isl_map_universe(space
);
1788 access
= isl_map_domain_product(access
, add_tag
);
1793 /* Return the relation mapping pairs of domain iterations and argument
1794 * values to the corresponding accessed data elements.
1796 __isl_give isl_map
*pet_expr_access_get_dependent_access(
1797 __isl_keep pet_expr
*expr
)
1801 if (expr
->type
!= pet_expr_access
)
1802 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1803 "not an access expression", return NULL
);
1805 return isl_map_copy(expr
->acc
.access
);
1808 /* Return the relation mapping domain iterations to all possibly
1809 * accessed data elements.
1810 * In particular, take the access relation and project out the values
1811 * of the arguments, if any.
1813 __isl_give isl_map
*pet_expr_access_get_may_access(__isl_keep pet_expr
*expr
)
1821 if (expr
->type
!= pet_expr_access
)
1822 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1823 "not an access expression", return NULL
);
1825 access
= pet_expr_access_get_dependent_access(expr
);
1826 if (expr
->n_arg
== 0)
1829 space
= isl_space_domain(isl_map_get_space(access
));
1830 map
= isl_map_universe(isl_space_unwrap(space
));
1831 map
= isl_map_domain_map(map
);
1832 access
= isl_map_apply_domain(access
, map
);
1837 /* Return a relation mapping domain iterations to definitely
1838 * accessed data elements, assuming the statement containing
1839 * the expression is executed.
1841 * If there are no arguments, then all elements are accessed.
1842 * Otherwise, we conservatively return an empty relation.
1844 __isl_give isl_map
*pet_expr_access_get_must_access(__isl_keep pet_expr
*expr
)
1850 if (expr
->type
!= pet_expr_access
)
1851 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1852 "not an access expression", return NULL
);
1854 if (expr
->n_arg
== 0)
1855 return pet_expr_access_get_dependent_access(expr
);
1857 space
= isl_map_get_space(expr
->acc
.access
);
1858 space
= isl_space_domain_factor_domain(space
);
1860 return isl_map_empty(space
);
1863 /* Return the relation mapping domain iterations to all possibly
1864 * accessed data elements, with its domain tagged with the reference
1867 __isl_give isl_map
*pet_expr_access_get_tagged_may_access(
1868 __isl_keep pet_expr
*expr
)
1875 access
= pet_expr_access_get_may_access(expr
);
1876 access
= pet_expr_tag_access(expr
, access
);
1881 /* Return the operation type of operation expression "expr".
1883 enum pet_op_type
pet_expr_op_get_type(__isl_keep pet_expr
*expr
)
1887 if (expr
->type
!= pet_expr_op
)
1888 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1889 "not an operation expression", return pet_op_last
);
1894 /* Replace the operation type of operation expression "expr" by "type".
1896 __isl_give pet_expr
*pet_expr_op_set_type(__isl_take pet_expr
*expr
,
1897 enum pet_op_type type
)
1900 return pet_expr_free(expr
);
1901 if (expr
->type
!= pet_expr_op
)
1902 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1903 "not an operation expression",
1904 return pet_expr_free(expr
));
1905 if (expr
->op
== type
)
1907 expr
= pet_expr_cow(expr
);
1915 /* Return the name of the function called by "expr".
1917 __isl_keep
const char *pet_expr_call_get_name(__isl_keep pet_expr
*expr
)
1921 if (expr
->type
!= pet_expr_call
)
1922 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1923 "not a call expression", return NULL
);
1927 /* Replace the name of the function called by "expr" by "name".
1929 __isl_give pet_expr
*pet_expr_call_set_name(__isl_take pet_expr
*expr
,
1930 __isl_keep
const char *name
)
1932 expr
= pet_expr_cow(expr
);
1934 return pet_expr_free(expr
);
1935 if (expr
->type
!= pet_expr_call
)
1936 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1937 "not a call expression", return pet_expr_free(expr
));
1939 expr
->name
= strdup(name
);
1941 return pet_expr_free(expr
);
1945 /* Replace the type of the cast performed by "expr" by "name".
1947 __isl_give pet_expr
*pet_expr_cast_set_type_name(__isl_take pet_expr
*expr
,
1948 __isl_keep
const char *name
)
1950 expr
= pet_expr_cow(expr
);
1952 return pet_expr_free(expr
);
1953 if (expr
->type
!= pet_expr_cast
)
1954 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1955 "not a cast expression", return pet_expr_free(expr
));
1956 free(expr
->type_name
);
1957 expr
->type_name
= strdup(name
);
1958 if (!expr
->type_name
)
1959 return pet_expr_free(expr
);
1963 /* Return the value of the integer represented by "expr".
1965 __isl_give isl_val
*pet_expr_int_get_val(__isl_keep pet_expr
*expr
)
1969 if (expr
->type
!= pet_expr_int
)
1970 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1971 "not an int expression", return NULL
);
1973 return isl_val_copy(expr
->i
);
1976 /* Replace the value of the integer represented by "expr" by "v".
1978 __isl_give pet_expr
*pet_expr_int_set_val(__isl_take pet_expr
*expr
,
1979 __isl_take isl_val
*v
)
1981 expr
= pet_expr_cow(expr
);
1984 if (expr
->type
!= pet_expr_int
)
1985 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
1986 "not an int expression", goto error
);
1987 isl_val_free(expr
->i
);
1993 pet_expr_free(expr
);
1997 /* Replace the value and string representation of the double
1998 * represented by "expr" by "d" and "s".
2000 __isl_give pet_expr
*pet_expr_double_set(__isl_take pet_expr
*expr
,
2001 double d
, __isl_keep
const char *s
)
2003 expr
= pet_expr_cow(expr
);
2005 return pet_expr_free(expr
);
2006 if (expr
->type
!= pet_expr_double
)
2007 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2008 "not a double expression", return pet_expr_free(expr
));
2011 expr
->d
.s
= strdup(s
);
2013 return pet_expr_free(expr
);
2017 /* Return a string representation of the double expression "expr".
2019 __isl_give
char *pet_expr_double_get_str(__isl_keep pet_expr
*expr
)
2023 if (expr
->type
!= pet_expr_double
)
2024 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2025 "not a double expression", return NULL
);
2026 return strdup(expr
->d
.s
);
2029 /* Return a piecewise affine expression defined on the specified domain
2030 * that represents NaN.
2032 static __isl_give isl_pw_aff
*non_affine(__isl_take isl_space
*space
)
2034 return isl_pw_aff_nan_on_domain(isl_local_space_from_space(space
));
2037 /* This function is called when we come across an access that is
2038 * nested in what is supposed to be an affine expression.
2039 * "pc" is the context in which the affine expression is created.
2040 * If nesting is allowed in "pc", we return an affine expression that is
2041 * equal to a new parameter corresponding to this nested access.
2042 * Otherwise, we return NaN.
2044 * Note that we currently don't allow nested accesses themselves
2045 * to contain any nested accesses, so we check if "expr" itself
2046 * involves any nested accesses (either explicitly as arguments
2047 * or implicitly through parameters) and return NaN if it does.
2049 * The new parameter is resolved in resolve_nested.
2051 static __isl_give isl_pw_aff
*nested_access(__isl_keep pet_expr
*expr
,
2052 __isl_keep pet_context
*pc
)
2057 isl_local_space
*ls
;
2063 if (!pet_context_allow_nesting(pc
))
2064 return non_affine(pet_context_get_space(pc
));
2066 if (pet_expr_get_type(expr
) != pet_expr_access
)
2067 isl_die(pet_expr_get_ctx(expr
), isl_error_internal
,
2068 "not an access expression", return NULL
);
2070 if (expr
->n_arg
> 0)
2071 return non_affine(pet_context_get_space(pc
));
2073 space
= pet_expr_access_get_parameter_space(expr
);
2074 nested
= pet_nested_any_in_space(space
);
2075 isl_space_free(space
);
2077 return non_affine(pet_context_get_space(pc
));
2079 ctx
= pet_expr_get_ctx(expr
);
2080 id
= pet_nested_pet_expr(pet_expr_copy(expr
));
2081 space
= pet_context_get_space(pc
);
2082 space
= isl_space_insert_dims(space
, isl_dim_param
, 0, 1);
2084 space
= isl_space_set_dim_id(space
, isl_dim_param
, 0, id
);
2085 ls
= isl_local_space_from_space(space
);
2086 aff
= isl_aff_var_on_domain(ls
, isl_dim_param
, 0);
2088 return isl_pw_aff_from_aff(aff
);
2091 /* Extract an affine expression from the access pet_expr "expr".
2092 * "pc" is the context in which the affine expression is created.
2094 * If "expr" is actually an affine expression rather than
2095 * a real access, then we return that expression.
2096 * Otherwise, we require that "expr" is of an integral type.
2097 * If not, we return NaN.
2099 * If we are accessing a scalar (i.e., not an array and not a member)
2100 * and if that scalar can be treated as a parameter (because it is
2101 * not assigned a known or unknown value in the relevant part of the AST),
2102 * then we return an affine expression equal to that parameter.
2104 * If the variable has been assigned a known affine expression,
2105 * then we return that expression.
2107 * Otherwise, we return an expression that is equal to a parameter
2108 * representing "expr" (if "allow_nested" is set).
2110 static __isl_give isl_pw_aff
*extract_affine_from_access(
2111 __isl_keep pet_expr
*expr
, __isl_keep pet_context
*pc
)
2116 isl_local_space
*ls
;
2119 if (pet_expr_is_affine(expr
)) {
2121 isl_multi_pw_aff
*mpa
;
2123 mpa
= pet_expr_access_get_index(expr
);
2124 pa
= isl_multi_pw_aff_get_pw_aff(mpa
, 0);
2125 isl_multi_pw_aff_free(mpa
);
2129 if (pet_expr_get_type_size(expr
) == 0)
2130 return non_affine(pet_context_get_space(pc
));
2132 if (!pet_expr_is_scalar_access(expr
))
2133 return nested_access(expr
, pc
);
2135 id
= pet_expr_access_get_id(expr
);
2136 if (pet_context_is_assigned(pc
, id
)) {
2139 pa
= pet_context_get_value(pc
, id
);
2142 if (!isl_pw_aff_involves_nan(pa
))
2144 isl_pw_aff_free(pa
);
2145 return nested_access(expr
, pc
);
2148 space
= pet_context_get_space(pc
);
2150 pos
= isl_space_find_dim_by_id(space
, isl_dim_param
, id
);
2154 pos
= isl_space_dim(space
, isl_dim_param
);
2155 space
= isl_space_add_dims(space
, isl_dim_param
, 1);
2156 space
= isl_space_set_dim_id(space
, isl_dim_param
, pos
, id
);
2159 ls
= isl_local_space_from_space(space
);
2160 aff
= isl_aff_var_on_domain(ls
, isl_dim_param
, pos
);
2162 return isl_pw_aff_from_aff(aff
);
2165 /* Construct an affine expression from the integer constant "expr".
2166 * "pc" is the context in which the affine expression is created.
2168 static __isl_give isl_pw_aff
*extract_affine_from_int(__isl_keep pet_expr
*expr
,
2169 __isl_keep pet_context
*pc
)
2171 isl_local_space
*ls
;
2177 ls
= isl_local_space_from_space(pet_context_get_space(pc
));
2178 aff
= isl_aff_val_on_domain(ls
, pet_expr_int_get_val(expr
));
2180 return isl_pw_aff_from_aff(aff
);
2183 /* Extract an affine expression from an addition or subtraction operation.
2184 * Return NaN if we are unable to extract an affine expression.
2186 * "pc" is the context in which the affine expression is created.
2188 static __isl_give isl_pw_aff
*extract_affine_add_sub(__isl_keep pet_expr
*expr
,
2189 __isl_keep pet_context
*pc
)
2196 if (expr
->n_arg
!= 2)
2197 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2198 "expecting two arguments", return NULL
);
2200 lhs
= pet_expr_extract_affine(expr
->args
[0], pc
);
2201 rhs
= pet_expr_extract_affine(expr
->args
[1], pc
);
2203 switch (pet_expr_op_get_type(expr
)) {
2205 return isl_pw_aff_add(lhs
, rhs
);
2207 return isl_pw_aff_sub(lhs
, rhs
);
2209 isl_pw_aff_free(lhs
);
2210 isl_pw_aff_free(rhs
);
2211 isl_die(pet_expr_get_ctx(expr
), isl_error_internal
,
2212 "not an addition or subtraction operation",
2218 /* Extract an affine expression from an integer division or a modulo operation.
2219 * Return NaN if we are unable to extract an affine expression.
2221 * "pc" is the context in which the affine expression is created.
2223 * In particular, if "expr" is lhs/rhs, then return
2225 * lhs >= 0 ? floor(lhs/rhs) : ceil(lhs/rhs)
2227 * If "expr" is lhs%rhs, then return
2229 * lhs - rhs * (lhs >= 0 ? floor(lhs/rhs) : ceil(lhs/rhs))
2231 * If the second argument (rhs) is not a (positive) integer constant,
2232 * then we fail to extract an affine expression.
2234 static __isl_give isl_pw_aff
*extract_affine_div_mod(__isl_keep pet_expr
*expr
,
2235 __isl_keep pet_context
*pc
)
2243 if (expr
->n_arg
!= 2)
2244 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2245 "expecting two arguments", return NULL
);
2247 rhs
= pet_expr_extract_affine(expr
->args
[1], pc
);
2249 is_cst
= isl_pw_aff_is_cst(rhs
);
2250 if (is_cst
< 0 || !is_cst
) {
2251 isl_pw_aff_free(rhs
);
2252 return non_affine(pet_context_get_space(pc
));
2255 lhs
= pet_expr_extract_affine(expr
->args
[0], pc
);
2257 switch (pet_expr_op_get_type(expr
)) {
2259 return isl_pw_aff_tdiv_q(lhs
, rhs
);
2261 return isl_pw_aff_tdiv_r(lhs
, rhs
);
2263 isl_pw_aff_free(lhs
);
2264 isl_pw_aff_free(rhs
);
2265 isl_die(pet_expr_get_ctx(expr
), isl_error_internal
,
2266 "not a div or mod operator", return NULL
);
2271 /* Extract an affine expression from a multiplication operation.
2272 * Return NaN if we are unable to extract an affine expression.
2273 * In particular, if neither of the arguments is a (piecewise) constant
2274 * then we return NaN.
2276 * "pc" is the context in which the affine expression is created.
2278 static __isl_give isl_pw_aff
*extract_affine_mul(__isl_keep pet_expr
*expr
,
2279 __isl_keep pet_context
*pc
)
2281 int lhs_cst
, rhs_cst
;
2287 if (expr
->n_arg
!= 2)
2288 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2289 "expecting two arguments", return NULL
);
2291 lhs
= pet_expr_extract_affine(expr
->args
[0], pc
);
2292 rhs
= pet_expr_extract_affine(expr
->args
[1], pc
);
2294 lhs_cst
= isl_pw_aff_is_cst(lhs
);
2295 rhs_cst
= isl_pw_aff_is_cst(rhs
);
2296 if (lhs_cst
< 0 || rhs_cst
< 0 || (!lhs_cst
&& !rhs_cst
)) {
2297 isl_pw_aff_free(lhs
);
2298 isl_pw_aff_free(rhs
);
2299 return non_affine(pet_context_get_space(pc
));
2302 return isl_pw_aff_mul(lhs
, rhs
);
2305 /* Extract an affine expression from a negation operation.
2306 * Return NaN if we are unable to extract an affine expression.
2308 * "pc" is the context in which the affine expression is created.
2310 static __isl_give isl_pw_aff
*extract_affine_neg(__isl_keep pet_expr
*expr
,
2311 __isl_keep pet_context
*pc
)
2317 if (expr
->n_arg
!= 1)
2318 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2319 "expecting one argument", return NULL
);
2321 res
= pet_expr_extract_affine(expr
->args
[0], pc
);
2322 return isl_pw_aff_neg(res
);
2325 /* Extract an affine expression from a conditional operation.
2326 * Return NaN if we are unable to extract an affine expression.
2328 * "pc" is the context in which the affine expression is created.
2330 static __isl_give isl_pw_aff
*extract_affine_cond(__isl_keep pet_expr
*expr
,
2331 __isl_keep pet_context
*pc
)
2333 isl_pw_aff
*cond
, *lhs
, *rhs
;
2337 if (expr
->n_arg
!= 3)
2338 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2339 "expecting three arguments", return NULL
);
2341 cond
= pet_expr_extract_affine_condition(expr
->args
[0], pc
);
2342 lhs
= pet_expr_extract_affine(expr
->args
[1], pc
);
2343 rhs
= pet_expr_extract_affine(expr
->args
[2], pc
);
2345 return isl_pw_aff_cond(cond
, lhs
, rhs
);
2352 static __isl_give isl_pw_aff
*wrap(__isl_take isl_pw_aff
*pwaff
, unsigned width
)
2357 ctx
= isl_pw_aff_get_ctx(pwaff
);
2358 mod
= isl_val_int_from_ui(ctx
, width
);
2359 mod
= isl_val_2exp(mod
);
2361 pwaff
= isl_pw_aff_mod_val(pwaff
, mod
);
2366 /* Limit the domain of "pwaff" to those elements where the function
2369 * 2^{width-1} <= pwaff < 2^{width-1}
2371 static __isl_give isl_pw_aff
*avoid_overflow(__isl_take isl_pw_aff
*pwaff
,
2376 isl_space
*space
= isl_pw_aff_get_domain_space(pwaff
);
2377 isl_local_space
*ls
= isl_local_space_from_space(space
);
2382 ctx
= isl_pw_aff_get_ctx(pwaff
);
2383 v
= isl_val_int_from_ui(ctx
, width
- 1);
2384 v
= isl_val_2exp(v
);
2386 bound
= isl_aff_zero_on_domain(ls
);
2387 bound
= isl_aff_add_constant_val(bound
, v
);
2388 b
= isl_pw_aff_from_aff(bound
);
2390 dom
= isl_pw_aff_lt_set(isl_pw_aff_copy(pwaff
), isl_pw_aff_copy(b
));
2391 pwaff
= isl_pw_aff_intersect_domain(pwaff
, dom
);
2393 b
= isl_pw_aff_neg(b
);
2394 dom
= isl_pw_aff_ge_set(isl_pw_aff_copy(pwaff
), b
);
2395 pwaff
= isl_pw_aff_intersect_domain(pwaff
, dom
);
2400 /* Handle potential overflows on signed computations.
2402 * If options->signed_overflow is set to PET_OVERFLOW_AVOID,
2403 * then we adjust the domain of "pa" to avoid overflows.
2405 static __isl_give isl_pw_aff
*signed_overflow(__isl_take isl_pw_aff
*pa
,
2409 struct pet_options
*options
;
2414 ctx
= isl_pw_aff_get_ctx(pa
);
2415 options
= isl_ctx_peek_pet_options(ctx
);
2416 if (!options
|| options
->signed_overflow
== PET_OVERFLOW_AVOID
)
2417 pa
= avoid_overflow(pa
, width
);
2422 /* Extract an affine expression from some an operation.
2423 * Return NaN if we are unable to extract an affine expression.
2424 * If the result of a binary (non boolean) operation is unsigned,
2425 * then we wrap it based on the size of the type. If the result is signed,
2426 * then we ensure that no overflow occurs.
2428 * "pc" is the context in which the affine expression is created.
2430 static __isl_give isl_pw_aff
*extract_affine_from_op(__isl_keep pet_expr
*expr
,
2431 __isl_keep pet_context
*pc
)
2436 switch (pet_expr_op_get_type(expr
)) {
2439 res
= extract_affine_add_sub(expr
, pc
);
2443 res
= extract_affine_div_mod(expr
, pc
);
2446 res
= extract_affine_mul(expr
, pc
);
2449 return extract_affine_neg(expr
, pc
);
2451 return extract_affine_cond(expr
, pc
);
2461 return pet_expr_extract_affine_condition(expr
, pc
);
2463 return non_affine(pet_context_get_space(pc
));
2468 if (isl_pw_aff_involves_nan(res
)) {
2469 isl_space
*space
= isl_pw_aff_get_domain_space(res
);
2470 isl_pw_aff_free(res
);
2471 return non_affine(space
);
2474 type_size
= pet_expr_get_type_size(expr
);
2476 res
= wrap(res
, type_size
);
2478 res
= signed_overflow(res
, -type_size
);
2483 /* Extract an affine expression from some special function calls.
2484 * Return NaN if we are unable to extract an affine expression.
2485 * In particular, we handle "min", "max", "ceild", "floord",
2486 * "intMod", "intFloor" and "intCeil".
2487 * In case of the latter five, the second argument needs to be
2488 * a (positive) integer constant.
2490 * "pc" is the context in which the affine expression is created.
2492 static __isl_give isl_pw_aff
*extract_affine_from_call(
2493 __isl_keep pet_expr
*expr
, __isl_keep pet_context
*pc
)
2495 isl_pw_aff
*aff1
, *aff2
;
2499 n
= pet_expr_get_n_arg(expr
);
2500 name
= pet_expr_call_get_name(expr
);
2501 if (!(n
== 2 && !strcmp(name
, "min")) &&
2502 !(n
== 2 && !strcmp(name
, "max")) &&
2503 !(n
== 2 && !strcmp(name
, "intMod")) &&
2504 !(n
== 2 && !strcmp(name
, "intFloor")) &&
2505 !(n
== 2 && !strcmp(name
, "intCeil")) &&
2506 !(n
== 2 && !strcmp(name
, "floord")) &&
2507 !(n
== 2 && !strcmp(name
, "ceild")))
2508 return non_affine(pet_context_get_space(pc
));
2510 if (!strcmp(name
, "min") || !strcmp(name
, "max")) {
2511 aff1
= pet_expr_extract_affine(expr
->args
[0], pc
);
2512 aff2
= pet_expr_extract_affine(expr
->args
[1], pc
);
2514 if (!strcmp(name
, "min"))
2515 aff1
= isl_pw_aff_min(aff1
, aff2
);
2517 aff1
= isl_pw_aff_max(aff1
, aff2
);
2518 } else if (!strcmp(name
, "intMod")) {
2521 if (pet_expr_get_type(expr
->args
[1]) != pet_expr_int
)
2522 return non_affine(pet_context_get_space(pc
));
2523 v
= pet_expr_int_get_val(expr
->args
[1]);
2524 aff1
= pet_expr_extract_affine(expr
->args
[0], pc
);
2525 aff1
= isl_pw_aff_mod_val(aff1
, v
);
2529 if (pet_expr_get_type(expr
->args
[1]) != pet_expr_int
)
2530 return non_affine(pet_context_get_space(pc
));
2531 v
= pet_expr_int_get_val(expr
->args
[1]);
2532 aff1
= pet_expr_extract_affine(expr
->args
[0], pc
);
2533 aff1
= isl_pw_aff_scale_down_val(aff1
, v
);
2534 if (!strcmp(name
, "floord") || !strcmp(name
, "intFloor"))
2535 aff1
= isl_pw_aff_floor(aff1
);
2537 aff1
= isl_pw_aff_ceil(aff1
);
2543 /* Extract an affine expression from "expr", if possible.
2544 * Otherwise return NaN.
2546 * "pc" is the context in which the affine expression is created.
2548 __isl_give isl_pw_aff
*pet_expr_extract_affine(__isl_keep pet_expr
*expr
,
2549 __isl_keep pet_context
*pc
)
2554 switch (pet_expr_get_type(expr
)) {
2555 case pet_expr_access
:
2556 return extract_affine_from_access(expr
, pc
);
2558 return extract_affine_from_int(expr
, pc
);
2560 return extract_affine_from_op(expr
, pc
);
2562 return extract_affine_from_call(expr
, pc
);
2564 case pet_expr_double
:
2565 case pet_expr_error
:
2566 return non_affine(pet_context_get_space(pc
));
2570 /* Extract an affine expressions representing the comparison "LHS op RHS"
2571 * Return NaN if we are unable to extract such an affine expression.
2573 * "pc" is the context in which the affine expression is created.
2575 * If the comparison is of the form
2579 * then the expression is constructed as the conjunction of
2584 * A similar optimization is performed for max(a,b) <= c.
2585 * We do this because that will lead to simpler representations
2586 * of the expression.
2587 * If isl is ever enhanced to explicitly deal with min and max expressions,
2588 * this optimization can be removed.
2590 __isl_give isl_pw_aff
*pet_expr_extract_comparison(enum pet_op_type op
,
2591 __isl_keep pet_expr
*lhs
, __isl_keep pet_expr
*rhs
,
2592 __isl_keep pet_context
*pc
)
2594 isl_pw_aff
*lhs_pa
, *rhs_pa
;
2596 if (op
== pet_op_gt
)
2597 return pet_expr_extract_comparison(pet_op_lt
, rhs
, lhs
, pc
);
2598 if (op
== pet_op_ge
)
2599 return pet_expr_extract_comparison(pet_op_le
, rhs
, lhs
, pc
);
2601 if (op
== pet_op_lt
|| op
== pet_op_le
) {
2602 if (pet_expr_is_min(rhs
)) {
2603 lhs_pa
= pet_expr_extract_comparison(op
, lhs
,
2605 rhs_pa
= pet_expr_extract_comparison(op
, lhs
,
2607 return pet_and(lhs_pa
, rhs_pa
);
2609 if (pet_expr_is_max(lhs
)) {
2610 lhs_pa
= pet_expr_extract_comparison(op
, lhs
->args
[0],
2612 rhs_pa
= pet_expr_extract_comparison(op
, lhs
->args
[1],
2614 return pet_and(lhs_pa
, rhs_pa
);
2618 lhs_pa
= pet_expr_extract_affine(lhs
, pc
);
2619 rhs_pa
= pet_expr_extract_affine(rhs
, pc
);
2621 return pet_comparison(op
, lhs_pa
, rhs_pa
);
2624 /* Extract an affine expressions from the comparison "expr".
2625 * Return NaN if we are unable to extract such an affine expression.
2627 * "pc" is the context in which the affine expression is created.
2629 static __isl_give isl_pw_aff
*extract_comparison(__isl_keep pet_expr
*expr
,
2630 __isl_keep pet_context
*pc
)
2632 enum pet_op_type type
;
2636 if (expr
->n_arg
!= 2)
2637 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2638 "expecting two arguments", return NULL
);
2640 type
= pet_expr_op_get_type(expr
);
2641 return pet_expr_extract_comparison(type
, expr
->args
[0], expr
->args
[1],
2645 /* Extract an affine expression representing the boolean operation
2646 * expressed by "expr".
2647 * Return NaN if we are unable to extract an affine expression.
2649 * "pc" is the context in which the affine expression is created.
2651 static __isl_give isl_pw_aff
*extract_boolean(__isl_keep pet_expr
*expr
,
2652 __isl_keep pet_context
*pc
)
2654 isl_pw_aff
*lhs
, *rhs
;
2660 n
= pet_expr_get_n_arg(expr
);
2661 lhs
= pet_expr_extract_affine_condition(expr
->args
[0], pc
);
2663 return pet_not(lhs
);
2665 rhs
= pet_expr_extract_affine_condition(expr
->args
[1], pc
);
2666 return pet_boolean(pet_expr_op_get_type(expr
), lhs
, rhs
);
2669 /* Extract the affine expression "expr != 0 ? 1 : 0".
2670 * Return NaN if we are unable to extract an affine expression.
2672 * "pc" is the context in which the affine expression is created.
2674 static __isl_give isl_pw_aff
*extract_implicit_condition(
2675 __isl_keep pet_expr
*expr
, __isl_keep pet_context
*pc
)
2679 res
= pet_expr_extract_affine(expr
, pc
);
2680 return pet_to_bool(res
);
2683 /* Extract a boolean affine expression from "expr".
2684 * Return NaN if we are unable to extract an affine expression.
2686 * "pc" is the context in which the affine expression is created.
2688 * If "expr" is neither a comparison nor a boolean operation,
2689 * then we assume it is an affine expression and return the
2690 * boolean expression "expr != 0 ? 1 : 0".
2692 __isl_give isl_pw_aff
*pet_expr_extract_affine_condition(
2693 __isl_keep pet_expr
*expr
, __isl_keep pet_context
*pc
)
2698 if (pet_expr_is_comparison(expr
))
2699 return extract_comparison(expr
, pc
);
2700 if (pet_expr_is_boolean(expr
))
2701 return extract_boolean(expr
, pc
);
2703 return extract_implicit_condition(expr
, pc
);
2706 /* Return the number of bits needed to represent the type of "expr".
2707 * See the description of the type_size field of pet_expr.
2709 int pet_expr_get_type_size(__isl_keep pet_expr
*expr
)
2711 return expr
? expr
->type_size
: 0;
2714 /* Replace the number of bits needed to represent the type of "expr"
2716 * See the description of the type_size field of pet_expr.
2718 __isl_give pet_expr
*pet_expr_set_type_size(__isl_take pet_expr
*expr
,
2721 expr
= pet_expr_cow(expr
);
2725 expr
->type_size
= type_size
;
2730 /* Extend an access expression "expr" with an additional index "index".
2731 * In particular, add "index" as an extra argument to "expr" and
2732 * adjust the index expression of "expr" to refer to this extra argument.
2733 * The caller is responsible for calling pet_expr_access_set_depth
2734 * to update the corresponding access relation.
2736 * Note that we only collect the individual index expressions as
2737 * arguments of "expr" here.
2738 * An attempt to integrate them into the index expression of "expr"
2739 * is performed in pet_expr_access_plug_in_args.
2741 __isl_give pet_expr
*pet_expr_access_subscript(__isl_take pet_expr
*expr
,
2742 __isl_take pet_expr
*index
)
2746 isl_local_space
*ls
;
2749 expr
= pet_expr_cow(expr
);
2750 if (!expr
|| !index
)
2752 if (expr
->type
!= pet_expr_access
)
2753 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2754 "not an access pet_expr", goto error
);
2756 n
= pet_expr_get_n_arg(expr
);
2757 expr
= pet_expr_insert_arg(expr
, n
, index
);
2761 space
= isl_multi_pw_aff_get_domain_space(expr
->acc
.index
);
2762 ls
= isl_local_space_from_space(space
);
2763 pa
= isl_pw_aff_from_aff(isl_aff_var_on_domain(ls
, isl_dim_set
, n
));
2764 expr
->acc
.index
= pet_array_subscript(expr
->acc
.index
, pa
);
2765 if (!expr
->acc
.index
)
2766 return pet_expr_free(expr
);
2770 pet_expr_free(expr
);
2771 pet_expr_free(index
);
2775 /* Extend an access expression "expr" with an additional member acces to "id".
2776 * In particular, extend the index expression of "expr" to include
2777 * the additional member access.
2778 * The caller is responsible for calling pet_expr_access_set_depth
2779 * to update the corresponding access relation.
2781 __isl_give pet_expr
*pet_expr_access_member(__isl_take pet_expr
*expr
,
2782 __isl_take isl_id
*id
)
2785 isl_multi_pw_aff
*field_access
;
2787 expr
= pet_expr_cow(expr
);
2790 if (expr
->type
!= pet_expr_access
)
2791 isl_die(pet_expr_get_ctx(expr
), isl_error_invalid
,
2792 "not an access pet_expr", goto error
);
2794 space
= isl_multi_pw_aff_get_domain_space(expr
->acc
.index
);
2795 space
= isl_space_from_domain(space
);
2796 space
= isl_space_set_tuple_id(space
, isl_dim_out
, id
);
2797 field_access
= isl_multi_pw_aff_zero(space
);
2798 expr
->acc
.index
= pet_array_member(expr
->acc
.index
, field_access
);
2799 if (!expr
->acc
.index
)
2800 return pet_expr_free(expr
);
2804 pet_expr_free(expr
);
2809 void pet_expr_dump_with_indent(__isl_keep pet_expr
*expr
, int indent
)
2816 fprintf(stderr
, "%*s", indent
, "");
2818 switch (expr
->type
) {
2819 case pet_expr_double
:
2820 fprintf(stderr
, "%s\n", expr
->d
.s
);
2823 isl_val_dump(expr
->i
);
2825 case pet_expr_access
:
2826 if (expr
->acc
.ref_id
) {
2827 isl_id_dump(expr
->acc
.ref_id
);
2828 fprintf(stderr
, "%*s", indent
, "");
2830 isl_map_dump(expr
->acc
.access
);
2831 fprintf(stderr
, "%*s", indent
, "");
2832 isl_multi_pw_aff_dump(expr
->acc
.index
);
2833 fprintf(stderr
, "%*sread: %d\n", indent
+ 2,
2834 "", expr
->acc
.read
);
2835 fprintf(stderr
, "%*swrite: %d\n", indent
+ 2,
2836 "", expr
->acc
.write
);
2837 for (i
= 0; i
< expr
->n_arg
; ++i
)
2838 pet_expr_dump_with_indent(expr
->args
[i
], indent
+ 2);
2841 fprintf(stderr
, "%s\n", op_str
[expr
->op
]);
2842 for (i
= 0; i
< expr
->n_arg
; ++i
)
2843 pet_expr_dump_with_indent(expr
->args
[i
], indent
+ 2);
2846 fprintf(stderr
, "%s/%d\n", expr
->name
, expr
->n_arg
);
2847 for (i
= 0; i
< expr
->n_arg
; ++i
)
2848 pet_expr_dump_with_indent(expr
->args
[i
], indent
+ 2);
2851 fprintf(stderr
, "(%s)\n", expr
->type_name
);
2852 for (i
= 0; i
< expr
->n_arg
; ++i
)
2853 pet_expr_dump_with_indent(expr
->args
[i
], indent
+ 2);
2855 case pet_expr_error
:
2856 fprintf(stderr
, "ERROR\n");
2861 void pet_expr_dump(__isl_keep pet_expr
*expr
)
2863 pet_expr_dump_with_indent(expr
, 0);