1 /* Gimple Represented as Polyhedra.
2 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
3 Contributed by Sebastian Pop <sebastian.pop@inria.fr>
4 and Tobias Grosser <grosser@fim.uni-passau.de>.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
31 #include "cloog/cloog.h"
32 #include "graphite-cloog-util.h"
33 #include "graphite-cloog-compat.h"
35 /* Counts the number of constraints in PCS. */
38 ppl_Constrain_System_number_of_constraints (ppl_const_Constraint_System_t pcs)
40 ppl_Constraint_System_const_iterator_t cit, end;
43 ppl_new_Constraint_System_const_iterator (&cit);
44 ppl_new_Constraint_System_const_iterator (&end);
46 for (ppl_Constraint_System_begin (pcs, cit),
47 ppl_Constraint_System_end (pcs, end);
48 !ppl_Constraint_System_const_iterator_equal_test (cit, end);
49 ppl_Constraint_System_const_iterator_increment (cit))
52 ppl_delete_Constraint_System_const_iterator (cit);
53 ppl_delete_Constraint_System_const_iterator (end);
58 oppose_constraint (CloogMatrix *m, int row)
62 /* Do not oppose the first column: it is the eq/ineq one. */
63 for (k = 1; k < m->NbColumns; k++)
64 mpz_neg (m->p[row][k], m->p[row][k]);
67 /* Inserts constraint CSTR at row ROW of matrix M. */
70 insert_constraint_into_matrix (CloogMatrix *m, int row,
71 ppl_const_Constraint_t cstr)
74 ppl_dimension_type i, dim, nb_cols = m->NbColumns;
76 ppl_Constraint_space_dimension (cstr, &dim);
77 ppl_new_Coefficient (&c);
79 for (i = 0; i < dim; i++)
81 ppl_Constraint_coefficient (cstr, i, c);
82 ppl_Coefficient_to_mpz_t (c, m->p[row][i + 1]);
85 for (i = dim; i < nb_cols - 1; i++)
86 mpz_set_si (m->p[row][i + 1], 0);
88 ppl_Constraint_inhomogeneous_term (cstr, c);
89 ppl_Coefficient_to_mpz_t (c, m->p[row][nb_cols - 1]);
90 mpz_set_si (m->p[row][0], 1);
92 switch (ppl_Constraint_type (cstr))
94 case PPL_CONSTRAINT_TYPE_LESS_THAN:
95 oppose_constraint (m, row);
96 case PPL_CONSTRAINT_TYPE_GREATER_THAN:
97 mpz_sub_ui (m->p[row][nb_cols - 1],
98 m->p[row][nb_cols - 1], 1);
101 case PPL_CONSTRAINT_TYPE_LESS_OR_EQUAL:
102 oppose_constraint (m, row);
103 case PPL_CONSTRAINT_TYPE_GREATER_OR_EQUAL:
106 case PPL_CONSTRAINT_TYPE_EQUAL:
107 mpz_set_si (m->p[row][0], 0);
111 /* Not yet implemented. */
115 ppl_delete_Coefficient (c);
118 /* Creates a CloogMatrix from constraint system PCS. */
121 new_Cloog_Matrix_from_ppl_Constraint_System (ppl_const_Constraint_System_t pcs)
124 ppl_Constraint_System_const_iterator_t cit, end;
125 ppl_dimension_type dim;
129 rows = ppl_Constrain_System_number_of_constraints (pcs);
130 ppl_Constraint_System_space_dimension (pcs, &dim);
131 matrix = cloog_matrix_alloc (rows, dim + 2);
132 ppl_new_Constraint_System_const_iterator (&cit);
133 ppl_new_Constraint_System_const_iterator (&end);
135 for (ppl_Constraint_System_begin (pcs, cit),
136 ppl_Constraint_System_end (pcs, end);
137 !ppl_Constraint_System_const_iterator_equal_test (cit, end);
138 ppl_Constraint_System_const_iterator_increment (cit))
140 ppl_const_Constraint_t c;
141 ppl_Constraint_System_const_iterator_dereference (cit, &c);
142 insert_constraint_into_matrix (matrix, row, c);
146 ppl_delete_Constraint_System_const_iterator (cit);
147 ppl_delete_Constraint_System_const_iterator (end);
152 /* Creates a CloogMatrix from polyhedron PH. */
155 new_Cloog_Matrix_from_ppl_Polyhedron (ppl_const_Polyhedron_t ph)
157 ppl_const_Constraint_System_t pcs;
160 ppl_Polyhedron_get_constraints (ph, &pcs);
161 res = new_Cloog_Matrix_from_ppl_Constraint_System (pcs);
166 /* Translates row ROW of the CloogMatrix MATRIX to a PPL Constraint. */
168 static ppl_Constraint_t
169 cloog_matrix_to_ppl_constraint (CloogMatrix *matrix, int row)
172 ppl_Constraint_t cstr;
173 ppl_Coefficient_t coef;
174 ppl_Linear_Expression_t expr;
175 ppl_dimension_type dim = matrix->NbColumns - 2;
177 ppl_new_Coefficient (&coef);
178 ppl_new_Linear_Expression_with_dimension (&expr, dim);
180 for (j = 1; j < matrix->NbColumns - 1; j++)
182 ppl_assign_Coefficient_from_mpz_t (coef, matrix->p[row][j]);
183 ppl_Linear_Expression_add_to_coefficient (expr, j - 1, coef);
186 ppl_assign_Coefficient_from_mpz_t (coef,
187 matrix->p[row][matrix->NbColumns - 1]);
188 ppl_Linear_Expression_add_to_inhomogeneous (expr, coef);
189 ppl_delete_Coefficient (coef);
191 if (mpz_sgn (matrix->p[row][0]) == 0)
192 ppl_new_Constraint (&cstr, expr, PPL_CONSTRAINT_TYPE_EQUAL);
194 ppl_new_Constraint (&cstr, expr, PPL_CONSTRAINT_TYPE_GREATER_OR_EQUAL);
196 ppl_delete_Linear_Expression (expr);
200 /* Creates a PPL constraint system from MATRIX. */
203 new_Constraint_System_from_Cloog_Matrix (ppl_Constraint_System_t *pcs,
208 ppl_new_Constraint_System (pcs);
210 for (i = 0; i < matrix->NbRows; i++)
212 ppl_Constraint_t c = cloog_matrix_to_ppl_constraint (matrix, i);
213 ppl_Constraint_System_insert_Constraint (*pcs, c);
214 ppl_delete_Constraint (c);
218 /* Creates a PPL Polyhedron from MATRIX. */
221 new_C_Polyhedron_from_Cloog_Matrix (ppl_Polyhedron_t *ph,
224 ppl_Constraint_System_t cs;
225 new_Constraint_System_from_Cloog_Matrix (&cs, matrix);
226 ppl_new_C_Polyhedron_recycle_Constraint_System (ph, cs);
229 /* Creates a CloogDomain from polyhedron PH. */
232 new_Cloog_Domain_from_ppl_Polyhedron (ppl_const_Polyhedron_t ph, int nb_params,
233 CloogState *state ATTRIBUTE_UNUSED)
235 CloogMatrix *mat = new_Cloog_Matrix_from_ppl_Polyhedron (ph);
236 CloogDomain *res = cloog_domain_from_cloog_matrix (state, mat, nb_params);
237 cloog_matrix_free (mat);
241 /* Create a CloogScattering from polyhedron PH. */
244 new_Cloog_Scattering_from_ppl_Polyhedron (ppl_const_Polyhedron_t ph,
245 int nb_params ATTRIBUTE_UNUSED,
246 int nb_scatt ATTRIBUTE_UNUSED,
247 CloogState *state ATTRIBUTE_UNUSED)
250 CloogMatrix *mat = new_Cloog_Matrix_from_ppl_Polyhedron (ph);
251 CloogScattering *res = cloog_scattering_from_cloog_matrix (state, mat,
255 cloog_matrix_free (mat);
258 return new_Cloog_Domain_from_ppl_Polyhedron (ph, nb_params, state);
262 /* Creates a CloogDomain from a pointset powerset PS. */
265 new_Cloog_Domain_from_ppl_Pointset_Powerset
266 (ppl_Pointset_Powerset_C_Polyhedron_t ps, int nb_params,
267 CloogState *state ATTRIBUTE_UNUSED)
269 CloogDomain *res = NULL;
270 ppl_Pointset_Powerset_C_Polyhedron_iterator_t it, end;
272 ppl_new_Pointset_Powerset_C_Polyhedron_iterator (&it);
273 ppl_new_Pointset_Powerset_C_Polyhedron_iterator (&end);
275 for (ppl_Pointset_Powerset_C_Polyhedron_iterator_begin (ps, it),
276 ppl_Pointset_Powerset_C_Polyhedron_iterator_end (ps, end);
277 !ppl_Pointset_Powerset_C_Polyhedron_iterator_equal_test (it, end);
278 ppl_Pointset_Powerset_C_Polyhedron_iterator_increment (it))
280 ppl_const_Polyhedron_t ph;
283 ppl_Pointset_Powerset_C_Polyhedron_iterator_dereference (it, &ph);
284 tmp = new_Cloog_Domain_from_ppl_Polyhedron (ph, nb_params, state);
289 res = cloog_domain_union (res, tmp);
292 ppl_delete_Pointset_Powerset_C_Polyhedron_iterator (it);
293 ppl_delete_Pointset_Powerset_C_Polyhedron_iterator (end);
295 gcc_assert (res != NULL);