/* Header for dependency analysis
   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   Free Software Foundation, Inc.
   Contributed by Paul Brook

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/>.  */

/****************************** Enums *********************************/
typedef enum
{
  NOT_ELEMENTAL,        /* Not elemental case: normal dependency check.  */
  ELEM_CHECK_VARIABLE,  /* Test whether variables overlap.  */
  ELEM_DONT_CHECK_VARIABLE  /* Test whether variables overlap only if used 
			       in an expression.  */
}
gfc_dep_check;


/*********************** Functions prototypes **************************/

bool gfc_ref_needs_temporary_p (gfc_ref *);
bool gfc_full_array_ref_p (gfc_ref *, bool *);
gfc_expr *gfc_get_noncopying_intrinsic_argument (gfc_expr *);
int gfc_check_fncall_dependency (gfc_expr *, sym_intent, gfc_symbol *,
				 gfc_actual_arglist *, gfc_dep_check);
int gfc_check_dependency (gfc_expr *, gfc_expr *, bool);
int gfc_is_same_range (gfc_array_ref *, gfc_array_ref *, int, int);
int gfc_expr_is_one (gfc_expr *, int);

int gfc_dep_resolver(gfc_ref *, gfc_ref *);
int gfc_are_equivalenced_arrays (gfc_expr *, gfc_expr *);