gcc/analyzer/complexity.h

   1 /* Measuring the complexity of svalues/regions.
   2    Copyright (C) 2020-2021 Free Software Foundation, Inc.
   3    Contributed by David Malcolm <dmalcolm@redhat.com>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it
   8 under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful, but
  13 WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 General Public License 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_ANALYZER_COMPLEXITY_H
  22 #define GCC_ANALYZER_COMPLEXITY_H
  23
  24 namespace ana {
  25
  26 /* A measurement of the complexity of an svalue or region, so that
  27    we can impose bounds on the growth of these tree-like structures
  28    and thus avoid infinite chains of analysis.  */
  29
  30 struct complexity
  31 {
  32   complexity (unsigned num_nodes, unsigned max_depth)
  33   : m_num_nodes (num_nodes), m_max_depth (max_depth)
  34   {}
  35
  36   complexity (const region *reg);
  37   complexity (const svalue *sval);
  38   static complexity from_pair (const complexity &c1, const complexity &c);
  39   static complexity from_vec_svalue (const vec<const svalue *> &vec);
  40
  41   /* The total number of svalues and regions in the tree of this
  42      entity, including the entity itself.  */
  43   unsigned m_num_nodes;
  44
  45   /* The maximum depth of the tree of this entity, including the
  46      entity itself.  */
  47   unsigned m_max_depth;
  48 };
  49
  50 } // namespace ana
  51
  52 #endif /* GCC_ANALYZER_COMPLEXITY_H */