expr.h

   1 #ifndef PET_EXPR_H
   2 #define PET_EXPR_H
   3
   4 #include <pet.h>
   5
   6 #include "context.h"
   7 #include "expr_access_type.h"
   8 #include "summary.h"
   9
  10 #if defined(__cplusplus)
  11 extern "C" {
  12 #endif
  13
  14 /* d is valid when type == pet_expr_double
  15  * i isl valid when type == pet_expr_int
  16  * acc is valid when type == pet_expr_access
  17  * c is valid when type == pet_expr_call
  18  * type is valid when type == pet_expr_cast
  19  * op is valid otherwise
  20  *
  21  * If type_size is not zero, then the expression is of an integer type
  22  * and type_size represents the size of the type in bits.
  23  * If type_size is greater than zero, then the type is unsigned
  24  * and the number of bits is equal to type_size.
  25  * If type_size is less than zero, then the type is signed
  26  * and the number of bits is equal to -type_size.
  27  * type_size may also be zero if the size is (still) unknown.
  28  *
  29  * For each access expression inside the body of a statement, acc.ref_id
  30  * is a unique reference identifier.
  31  * acc.index represents the index expression, while acc.access
  32  * represents the corresponding access relations.
  33  * The output dimension of the index expression may be smaller
  34  * than the number of dimensions of the accessed array (recorded
  35  * in acc.depth).
  36  * The target space of the access relation, on the other hand,
  37  * is equal to the array space.
  38  * The entries in acc.access may be NULL if they can be derived directly from
  39  * acc.index and acc.depth in construct_access_relation or if they are
  40  * irrelevant for the given type of access.
  41  * In particular, the entries of acc.access may be NULL if there are
  42  * no additional constraints on the access relations.
  43  * Both acc.index and the acc.access entries usually map an iteration space
  44  * to a (partial) data space.
  45  * If the access has arguments, however, then the domain of the
  46  * mapping is a wrapped mapping from the iteration space
  47  * to a space of dimensionality equal to the number of arguments.
  48  * Each dimension in this space corresponds to the value of the
  49  * corresponding argument.
  50  *
  51  * The ranges of the index expressions and access relations may
  52  * also be wrapped relations, in which case the expression represents
  53  * a member access, with the structure represented by the domain
  54  * of this wrapped relation and the member represented by the range.
  55  * In case of nested member accesses, the domain is itself a wrapped
  56  * relation.
  57  *
  58  * If the data space is unnamed (and 1D), then it represents
  59  * the set of integers.  That is, the access represents a value that
  60  * is equal to the index.
  61  *
  62  * An access expresssion is marked "read" if it represents a read and
  63  * marked "write" if it represents a write.  A single access expression
  64  * may be marked both read and write.
  65  * Alternatively, the expression may be marked "kill", in which case it
  66  * is the argument of a kill operation and represents the set of
  67  * killed array elements.  Such accesses are marked neither read nor write.
  68  * Since a kill can never be a read (or a write), the killed access
  69  * relation is stored in the same location as the may read access relation.
  70  *
  71  * A function call is represented by the name of the called function and
  72  * an optional function summary (the value NULL indicating that there is
  73  * no function summary).
  74  *
  75  * A double is represented as both an (approximate) value "val" and
  76  * a string representation "s".
  77  */
  78 struct pet_expr {
  79         int ref;
  80         isl_ctx *ctx;
  81
  82         enum pet_expr_type type;
  83
  84         int type_size;
  85
  86         unsigned n_arg;
  87         pet_expr **args;
  88
  89         union {
  90                 struct {
  91                         isl_id *ref_id;
  92                         isl_multi_pw_aff *index;
  93                         int depth;
  94                         unsigned read : 1;
  95                         unsigned write : 1;
  96                         unsigned kill : 1;
  97                         isl_union_map *access[pet_expr_access_end];
  98                 } acc;
  99                 enum pet_op_type op;
 100                 struct {
 101                         char *name;
 102                         pet_function_summary *summary;
 103                 } c;
 104                 char *type_name;
 105                 struct {
 106                         double val;
 107                         char *s;
 108                 } d;
 109                 isl_val *i;
 110         };
 111 };
 112
 113 const char *pet_type_str(enum pet_expr_type type);
 114 enum pet_expr_type pet_str_type(const char *str);
 115
 116 enum pet_op_type pet_str_op(const char *str);
 117
 118 __isl_give pet_expr *pet_expr_alloc(isl_ctx *ctx, enum pet_expr_type type);
 119 __isl_give pet_expr *pet_expr_kill_from_access_and_index(
 120         __isl_take isl_map *access, __isl_take isl_multi_pw_aff *index);
 121 __isl_give pet_expr *pet_expr_new_unary(int type_size, enum pet_op_type op,
 122         __isl_take pet_expr *arg);
 123 __isl_give pet_expr *pet_expr_new_binary(int type_size, enum pet_op_type op,
 124         __isl_take pet_expr *lhs, __isl_take pet_expr *rhs);
 125 __isl_give pet_expr *pet_expr_new_ternary(__isl_take pet_expr *cond,
 126         __isl_take pet_expr *lhs, __isl_take pet_expr *rhs);
 127 __isl_give pet_expr *pet_expr_new_call(isl_ctx *ctx, const char *name,
 128         unsigned n_arg);
 129 __isl_give pet_expr *pet_expr_new_double(isl_ctx *ctx, double d, const char *s);
 130 __isl_give pet_expr *pet_expr_new_int(__isl_take isl_val *v);
 131
 132 __isl_give pet_expr *pet_expr_cow(__isl_take pet_expr *expr);
 133
 134 __isl_give isl_pw_aff *pet_expr_extract_affine_condition(
 135         __isl_keep pet_expr *expr, __isl_keep pet_context *pc);
 136 __isl_give isl_pw_aff *pet_expr_extract_comparison(enum pet_op_type op,
 137         __isl_keep pet_expr *lhs, __isl_keep pet_expr *rhs,
 138         __isl_keep pet_context *pc);
 139 __isl_give pet_expr *pet_expr_resolve_assume(__isl_take pet_expr *expr,
 140         __isl_keep pet_context *pc);
 141
 142 int pet_expr_is_assume(__isl_keep pet_expr *expr);
 143 int pet_expr_is_boolean(__isl_keep pet_expr *expr);
 144 int pet_expr_is_comparison(__isl_keep pet_expr *expr);
 145 int pet_expr_is_min(__isl_keep pet_expr *expr);
 146 int pet_expr_is_max(__isl_keep pet_expr *expr);
 147 int pet_expr_is_scalar_access(__isl_keep pet_expr *expr);
 148 int pet_expr_is_equal(__isl_keep pet_expr *expr1, __isl_keep pet_expr *expr2);
 149
 150 __isl_give isl_space *pet_expr_access_get_parameter_space(
 151         __isl_take pet_expr *expr);
 152 __isl_give isl_space *pet_expr_access_get_augmented_domain_space(
 153         __isl_keep pet_expr *expr);
 154 __isl_give isl_space *pet_expr_access_get_domain_space(
 155         __isl_keep pet_expr *expr);
 156 __isl_give isl_space *pet_expr_access_get_data_space(__isl_keep pet_expr *expr);
 157
 158 __isl_give isl_map *pet_expr_access_get_may_access(__isl_keep pet_expr *expr);
 159
 160 __isl_give pet_expr *pet_expr_map_access(__isl_take pet_expr *expr,
 161         __isl_give pet_expr *(*fn)(__isl_take pet_expr *expr, void *user),
 162         void *user);
 163 __isl_give pet_expr *pet_expr_map_call(__isl_take pet_expr *expr,
 164         __isl_give pet_expr *(*fn)(__isl_take pet_expr *expr, void *user),
 165         void *user);
 166
 167 __isl_give isl_union_map *pet_expr_access_get_access(__isl_keep pet_expr *expr,
 168         enum pet_expr_access_type type);
 169 __isl_give pet_expr *pet_expr_access_set_access(__isl_take pet_expr *expr,
 170         enum pet_expr_access_type type, __isl_take isl_union_map *access);
 171 __isl_give pet_expr *pet_expr_access_set_index(__isl_take pet_expr *expr,
 172         __isl_take isl_multi_pw_aff *index);
 173
 174 int pet_expr_is_sub_access(__isl_keep pet_expr *expr1,
 175         __isl_keep pet_expr *expr2, int n_arg);
 176
 177 int pet_expr_writes(__isl_keep pet_expr *expr, __isl_keep isl_id *id);
 178
 179 __isl_give pet_expr *pet_expr_access_move_dims(__isl_take pet_expr *expr,
 180         enum isl_dim_type dst_type, unsigned dst_pos,
 181         enum isl_dim_type src_type, unsigned src_pos, unsigned n);
 182 __isl_give pet_expr *pet_expr_access_pullback_multi_aff(
 183         __isl_take pet_expr *expr, __isl_take isl_multi_aff *ma);
 184 __isl_give pet_expr *pet_expr_access_pullback_multi_pw_aff(
 185         __isl_take pet_expr *expr, __isl_take isl_multi_pw_aff *mpa);
 186 __isl_give pet_expr *pet_expr_access_align_params(__isl_take pet_expr *expr);
 187 __isl_give pet_expr *pet_expr_restrict(__isl_take pet_expr *expr,
 188         __isl_take isl_set *cond);
 189 __isl_give pet_expr *pet_expr_access_update_domain(__isl_take pet_expr *expr,
 190         __isl_keep isl_multi_pw_aff *update);
 191 __isl_give pet_expr *pet_expr_update_domain(__isl_take pet_expr *expr,
 192         __isl_take isl_multi_pw_aff *update);
 193 __isl_give pet_expr *pet_expr_align_params(__isl_take pet_expr *expr,
 194         __isl_take isl_space *space);
 195 __isl_give pet_expr *pet_expr_filter(__isl_take pet_expr *expr,
 196         __isl_take isl_multi_pw_aff *test, int satisfied);
 197 __isl_give pet_expr *pet_expr_add_ref_ids(__isl_take pet_expr *expr,
 198         int *n_ref);
 199 __isl_give pet_expr *pet_expr_anonymize(__isl_take pet_expr *expr);
 200 __isl_give pet_expr *pet_expr_gist(__isl_take pet_expr *expr,
 201         __isl_keep isl_set *context, __isl_keep isl_union_map *value_bounds);
 202
 203 __isl_give isl_union_map *pet_expr_tag_access(__isl_keep pet_expr *expr,
 204         __isl_take isl_union_map *access);
 205
 206 __isl_give pet_expr *pet_expr_access_subscript(__isl_take pet_expr *base,
 207         __isl_take pet_expr *index);
 208 __isl_give pet_expr *pet_expr_access_member(__isl_take pet_expr *base,
 209         __isl_take isl_id *member);
 210
 211 int pet_expr_call_has_summary(__isl_keep pet_expr *expr);
 212 __isl_give pet_function_summary *pet_expr_call_get_summary(
 213         __isl_keep pet_expr *expr);
 214 __isl_give pet_expr *pet_expr_call_set_summary(__isl_take pet_expr *expr,
 215         __isl_take pet_function_summary *summary);
 216
 217 int pet_expr_get_type_size(__isl_keep pet_expr *expr);
 218 __isl_give pet_expr *pet_expr_set_type_size(__isl_take pet_expr *expr,
 219         int type_size);
 220 __isl_give pet_expr *pet_expr_access_set_depth(__isl_take pet_expr *expr,
 221         int depth);
 222
 223 __isl_give pet_expr *pet_expr_insert_domain(__isl_take pet_expr *expr,
 224         __isl_take isl_space *space);
 225
 226 void pet_expr_dump_with_indent(__isl_keep pet_expr *expr, int indent);
 227
 228 #if defined(__cplusplus)
 229 }
 230 #endif
 231
 232 #endif