/*

  $Id$

  Copyright 1989-2016 MINES ParisTech

  This file is part of PIPS.

  PIPS 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 of the License, or
  any later version.

  PIPS 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 PIPS.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifdef HAVE_CONFIG_H
#include "pips_config.h"
#endif

#include <stdint.h>
#include <stdlib.h>

#include "genC.h"
#include "misc.h"
#include "linear.h"

#include "ri.h"

#include "freia.h"
#include "hwac.h"

/*
  @brief compile one dag with AIPO optimizations
  @param ls statements underlying the full dag
  @param occs image occurences
  @param exchanges statements to exchange because of dependences
  @return the list of allocated intermediate images
*/
list freia_aipo_compile_calls
(string module,
 dag fulld,
 list /* of statements */ ls,
 const hash_table occs,
 hash_table exchanges,
 int number)
{
  pips_debug(3, "considering %d statements\n", (int) gen_length(ls));
  pips_assert("some statements", ls);

  // about aipo statistics: no helper file to put them...

  // handle intermediate images
  hash_table init = hash_table_make(hash_pointer, 0);
  list new_images = dag_fix_image_reuse(fulld, init, occs);

  // optimize dag
  list added_before = NIL, added_after = NIL;
  freia_dag_optimize(fulld, exchanges, &added_before, &added_after);

  // dump final optimised dag
  dag_dot_dump_prefix(module, "dag_cleaned_", number, fulld,
                      added_before, added_after);

  // now may put actual allocations, which messes up statement numbers
  list reals =
    freia_allocate_new_images_if_needed(ls, new_images, occs, init, NULL);

  // ??? should it be NIL because it is not useful in AIPO->AIPO?
  freia_insert_added_stats(ls, added_before, true);
  added_before = NIL;
  freia_insert_added_stats(ls, added_after, false);
  added_after = NIL;

  // cleanup
  gen_free_list(new_images);
  hash_table_free(init);

  return reals;
}