Move cloog-related functions from graphite-ppl.{c,h} to new graphite-cloog-util.{c,h}.

2010-07-05  Andreas Simbuerger  <simbuerg@fim.uni-passau.de>

	* Makefile.in
	(OBJS-common): Added graphite-cloog-util.o.
	(graphite-clast-to-gimple.o): Added graphite-cloog-util.h.
	(graphite-cloog-util.o): New.
	(graphite-ppl.o): Added graphite-cloog-util.h.
	* graphite-clast-to-gimple.c:
	Added graphite-cloog-util.h to include statements.
	* graphite-cloog-util.c: New.
	(new_Cloog_Matrix_from_ppl_Polyhedron): Moved from graphite-ppl.c.
	(new_Cloog_Domain_from_ppl_Polyhedron): Same.
	(new_Cloog_Domain_from_ppl_Pointset_Powerset): Same.
	(new_C_Polyhedron_from_Cloog_Matrix): Same.
	(insert_constraint_into_matrix): Same.
	(ppl_Constrain_System_number_of_constraints): Same.
	(new_Cloog_Matrix_from_ppl_Constraint_System): Same.
	(oppose_constraint): Same.
	(cloog_matrix_to_ppl_constraint): Same.
	(new_Constraint_System_from_Cloog_Matrix): Same.
	* graphite-cloog-util.h: New.
	(new_Cloog_Matrix_from_ppl_Polyhedron): Moved from graphite-ppl.h.
	(new_Cloog_Domain_from_ppl_Polyhedron): Same.
	(new_Cloog_Domain_from_ppl_Pointset_Powerset): Same.
	(new_C_Polyhedron_from_Cloog_Matrix): Same.
	(insert_constraint_into_matrix): Same.
	* graphite-ppl.c:
	Added graphite-cloog-util.h to include statements.
	(new_Cloog_Matrix_from_ppl_Polyhedron): Moved to graphite-cloog-util.c.
	(new_Cloog_Domain_from_ppl_Polyhedron): Same.
	(new_Cloog_Domain_from_ppl_Pointset_Powerset): Same.
	(new_C_Polyhedron_from_Cloog_Matrix): Same.
	(insert_constraint_into_matrix): Same.
	(ppl_Constrain_System_number_of_constraints): Same.
	(new_Cloog_Matrix_from_ppl_Constraint_System): Same.
	(oppose_constraint): Same.
	(cloog_matrix_to_ppl_constraint): Same.
	(new_Constraint_System_from_Cloog_Matrix): Same.
	* graphite-ppl.h:
	(new_Cloog_Matrix_from_ppl_Polyhedron): Moved to
	graphite-cloog-util.h.
	(new_Cloog_Domain_from_ppl_Polyhedron): Same.
	(new_Cloog_Domain_from_ppl_Pointset_Powerset): Same.
	(new_C_Polyhedron_from_Cloog_Matrix): Same.
	(insert_constraint_into_matrix): Same.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@163134 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 275 insertions, 0 deletions

diff --git a/gcc/graphite-cloog-util.c b/gcc/graphite-cloog-util.c
new file mode 100644
index 00000000000..21a7872324c
--- /dev/null
+++ b/gcc/graphite-cloog-util.c
@@ -0,0 +1,275 @@
+/* Gimple Represented as Polyhedra.
+   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+   Contributed by Sebastian Pop <sebastian.pop@inria.fr>
+   and Tobias Grosser <grosser@fim.uni-passau.de>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "ggc.h"
+
+#ifdef HAVE_cloog
+
+#include "ppl_c.h"
+#include "cloog/cloog.h"
+#include "graphite-cloog-util.h"
+
+/* Counts the number of constraints in PCS.  */
+
+static int
+ppl_Constrain_System_number_of_constraints (ppl_const_Constraint_System_t pcs)
+{
+  ppl_Constraint_System_const_iterator_t cit, end;
+  int num = 0;
+
+  ppl_new_Constraint_System_const_iterator (&cit);
+  ppl_new_Constraint_System_const_iterator (&end);
+
+  for (ppl_Constraint_System_begin (pcs, cit),
+       ppl_Constraint_System_end (pcs, end);
+       !ppl_Constraint_System_const_iterator_equal_test (cit, end);
+       ppl_Constraint_System_const_iterator_increment (cit))
+    num++;
+
+  ppl_delete_Constraint_System_const_iterator (cit);
+  ppl_delete_Constraint_System_const_iterator (end);
+  return num;
+}
+
+static void
+oppose_constraint (CloogMatrix *m, int row)
+{
+  int k;
+
+  /* Do not oppose the first column: it is the eq/ineq one.  */
+  for (k = 1; k < m->NbColumns; k++)
+    mpz_neg (m->p[row][k], m->p[row][k]);
+}
+
+/* Inserts constraint CSTR at row ROW of matrix M.  */
+
+static void
+insert_constraint_into_matrix (CloogMatrix *m, int row,
+			       ppl_const_Constraint_t cstr)
+{
+  ppl_Coefficient_t c;
+  ppl_dimension_type i, dim, nb_cols = m->NbColumns;
+
+  ppl_Constraint_space_dimension (cstr, &dim);
+  ppl_new_Coefficient (&c);
+
+  for (i = 0; i < dim; i++)
+    {
+      ppl_Constraint_coefficient (cstr, i, c);
+      ppl_Coefficient_to_mpz_t (c, m->p[row][i + 1]);
+    }
+
+  for (i = dim; i < nb_cols - 1; i++)
+    mpz_set_si (m->p[row][i + 1], 0);
+
+  ppl_Constraint_inhomogeneous_term  (cstr, c);
+  ppl_Coefficient_to_mpz_t (c, m->p[row][nb_cols - 1]);
+  mpz_set_si (m->p[row][0], 1);
+
+  switch (ppl_Constraint_type (cstr))
+    {
+    case PPL_CONSTRAINT_TYPE_LESS_THAN:
+      oppose_constraint (m, row);
+    case PPL_CONSTRAINT_TYPE_GREATER_THAN:
+      mpz_sub_ui (m->p[row][nb_cols - 1],
+		     m->p[row][nb_cols - 1], 1);
+      break;
+
+    case PPL_CONSTRAINT_TYPE_LESS_OR_EQUAL:
+      oppose_constraint (m, row);
+    case PPL_CONSTRAINT_TYPE_GREATER_OR_EQUAL:
+      break;
+
+    case PPL_CONSTRAINT_TYPE_EQUAL:
+      mpz_set_si (m->p[row][0], 0);
+      break;
+
+    default:
+      /* Not yet implemented.  */
+      gcc_unreachable();
+    }
+
+  ppl_delete_Coefficient (c);
+}
+
+/* Creates a CloogMatrix from constraint system PCS.  */
+
+static CloogMatrix *
+new_Cloog_Matrix_from_ppl_Constraint_System (ppl_const_Constraint_System_t pcs)
+{
+  CloogMatrix *matrix;
+  ppl_Constraint_System_const_iterator_t cit, end;
+  ppl_dimension_type dim;
+  int rows;
+  int row = 0;
+
+  rows = ppl_Constrain_System_number_of_constraints (pcs);
+  ppl_Constraint_System_space_dimension (pcs, &dim);
+  matrix = cloog_matrix_alloc (rows, dim + 2);
+  ppl_new_Constraint_System_const_iterator (&cit);
+  ppl_new_Constraint_System_const_iterator (&end);
+
+  for (ppl_Constraint_System_begin (pcs, cit),
+       ppl_Constraint_System_end (pcs, end);
+       !ppl_Constraint_System_const_iterator_equal_test (cit, end);
+       ppl_Constraint_System_const_iterator_increment (cit))
+    {
+      ppl_const_Constraint_t c;
+      ppl_Constraint_System_const_iterator_dereference (cit, &c);
+      insert_constraint_into_matrix (matrix, row, c);
+      row++;
+    }
+
+  ppl_delete_Constraint_System_const_iterator (cit);
+  ppl_delete_Constraint_System_const_iterator (end);
+
+  return matrix;
+}
+
+/* Creates a CloogMatrix from polyhedron PH.  */
+
+CloogMatrix *
+new_Cloog_Matrix_from_ppl_Polyhedron (ppl_const_Polyhedron_t ph)
+{
+  ppl_const_Constraint_System_t pcs;
+  CloogMatrix *res;
+
+  ppl_Polyhedron_get_constraints (ph, &pcs);
+  res = new_Cloog_Matrix_from_ppl_Constraint_System (pcs);
+
+  return res;
+}
+
+/* Translates row ROW of the CloogMatrix MATRIX to a PPL Constraint.  */
+
+static ppl_Constraint_t
+cloog_matrix_to_ppl_constraint (CloogMatrix *matrix, int row)
+{
+  int j;
+  ppl_Constraint_t cstr;
+  ppl_Coefficient_t coef;
+  ppl_Linear_Expression_t expr;
+  ppl_dimension_type dim = matrix->NbColumns - 2;
+
+  ppl_new_Coefficient (&coef);
+  ppl_new_Linear_Expression_with_dimension (&expr, dim);
+
+  for (j = 1; j < matrix->NbColumns - 1; j++)
+    {
+      ppl_assign_Coefficient_from_mpz_t (coef, matrix->p[row][j]);
+      ppl_Linear_Expression_add_to_coefficient (expr, j - 1, coef);
+    }
+
+  ppl_assign_Coefficient_from_mpz_t (coef,
+				     matrix->p[row][matrix->NbColumns - 1]);
+  ppl_Linear_Expression_add_to_inhomogeneous (expr, coef);
+  ppl_delete_Coefficient (coef);
+
+  if (mpz_sgn (matrix->p[row][0]))
+    ppl_new_Constraint (&cstr, expr, PPL_CONSTRAINT_TYPE_EQUAL);
+  else
+    ppl_new_Constraint (&cstr, expr, PPL_CONSTRAINT_TYPE_GREATER_OR_EQUAL);
+
+  ppl_delete_Linear_Expression (expr);
+  return cstr;
+}
+
+/* Creates a PPL constraint system from MATRIX.  */
+
+static void
+new_Constraint_System_from_Cloog_Matrix (ppl_Constraint_System_t *pcs,
+					 CloogMatrix *matrix)
+{
+  int i;
+
+  ppl_new_Constraint_System (pcs);
+
+  for (i = 0; i < matrix->NbRows; i++)
+    {
+      ppl_Constraint_t c = cloog_matrix_to_ppl_constraint (matrix, i);
+      ppl_Constraint_System_insert_Constraint (*pcs, c);
+      ppl_delete_Constraint (c);
+    }
+}
+
+/* Creates a PPL Polyhedron from MATRIX.  */
+
+void
+new_C_Polyhedron_from_Cloog_Matrix (ppl_Polyhedron_t *ph,
+				      CloogMatrix *matrix)
+{
+  ppl_Constraint_System_t cs;
+  new_Constraint_System_from_Cloog_Matrix (&cs, matrix);
+  ppl_new_C_Polyhedron_recycle_Constraint_System (ph, cs);
+}
+
+/* Creates a CloogDomain from polyhedron PH.  */
+
+CloogDomain *
+new_Cloog_Domain_from_ppl_Polyhedron (ppl_const_Polyhedron_t ph)
+{
+  CloogMatrix *mat = new_Cloog_Matrix_from_ppl_Polyhedron (ph);
+  CloogDomain *res = cloog_domain_matrix2domain (mat);
+  cloog_matrix_free (mat);
+  return res;
+}
+
+/* Creates a CloogDomain from a pointset powerset PS.  */
+
+CloogDomain *
+new_Cloog_Domain_from_ppl_Pointset_Powerset (
+  ppl_Pointset_Powerset_C_Polyhedron_t ps)
+{
+  CloogDomain *res = NULL;
+  ppl_Pointset_Powerset_C_Polyhedron_iterator_t it, end;
+
+  ppl_new_Pointset_Powerset_C_Polyhedron_iterator (&it);
+  ppl_new_Pointset_Powerset_C_Polyhedron_iterator (&end);
+
+  for (ppl_Pointset_Powerset_C_Polyhedron_iterator_begin (ps, it),
+       ppl_Pointset_Powerset_C_Polyhedron_iterator_end (ps, end);
+       !ppl_Pointset_Powerset_C_Polyhedron_iterator_equal_test (it, end);
+       ppl_Pointset_Powerset_C_Polyhedron_iterator_increment (it))
+    {
+      ppl_const_Polyhedron_t ph;
+      CloogDomain *tmp;
+
+      ppl_Pointset_Powerset_C_Polyhedron_iterator_dereference (it, &ph);
+      tmp = new_Cloog_Domain_from_ppl_Polyhedron (ph);
+
+      if (res == NULL)
+	res = tmp;
+      else
+	res = cloog_domain_union (res, tmp);
+    }
+
+  ppl_delete_Pointset_Powerset_C_Polyhedron_iterator (it);
+  ppl_delete_Pointset_Powerset_C_Polyhedron_iterator (end);
+
+  gcc_assert (res != NULL);
+
+  return res;
+}
+#endif