1  /* Header file for misc range functions. -*- C++ -*-
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     Contributed by Aldy Hernandez <aldyh@redhat.com>.
       4  
       5  This file is part of GCC.
       6  
       7  GCC is free software; you can redistribute it and/or modify it under
       8  the terms of the GNU General Public License as published by the Free
       9  Software Foundation; either version 3, or (at your option) any later
      10  version.
      11  
      12  GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13  WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15   for more details.
      16  
      17  You should have received a copy of the GNU General Public License
      18  along with GCC; see the file COPYING3.  If not see
      19  <http://www.gnu.org/licenses/>.  */
      20  
      21  #ifndef GCC_RANGE_H
      22  #define GCC_RANGE_H
      23  
      24  value_range range_zero (tree type);
      25  value_range range_nonzero (tree type);
      26  value_range range_positives (tree type);
      27  value_range range_negatives (tree type);
      28  
      29  // Return an irange instance that is a boolean TRUE.
      30  
      31  inline int_range<1>
      32  range_true (tree type)
      33  {
      34    unsigned prec = TYPE_PRECISION (type);
      35    return int_range<2> (type, wi::one (prec), wi::one (prec));
      36  }
      37  
      38  // Return an irange instance that is a boolean FALSE.
      39  
      40  inline int_range<1>
      41  range_false (tree type)
      42  {
      43    unsigned prec = TYPE_PRECISION (type);
      44    return int_range<2> (type, wi::zero (prec), wi::zero (prec));
      45  }
      46  
      47  // Return an irange that covers both true and false.
      48  
      49  inline int_range<1>
      50  range_true_and_false (tree type)
      51  {
      52    unsigned prec = TYPE_PRECISION (type);
      53    if (prec == 1)
      54      return int_range<2> (type);
      55    return int_range<2> (type, wi::zero (prec), wi::one (prec));
      56  }
      57  
      58  #endif // GCC_RANGE_H