| /* Gimple range edge header file. |
| Copyright (C) 2020-2021 Free Software Foundation, Inc. |
| Contributed by Andrew MacLeod <amacleod@redhat.com> |
| and Aldy Hernandez <aldyh@redhat.com>. |
| |
| 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/>. */ |
| |
| #ifndef GIMPLE_RANGE_EDGE_H |
| #define GIMPLE_RANGE_EDGE_H |
| |
| // This class is used to query ranges on constant edges in GIMPLE. |
| // |
| // For a COND_EXPR, the TRUE edge will return [1,1] and the false edge a [0,0]. |
| // |
| // For SWITCH_EXPR, it is awkward to calculate ranges. When a request |
| // is made, the entire switch is evalauted and the results cached. |
| // Any future requests to that switch will use the cached value, providing |
| // dramatic decrease in computation time. |
| // |
| // The API is simple, just ask for the range on the edge. |
| // The return value is NULL for no range, or the branch statement which the |
| // edge gets the range from, along with the range. |
| |
| class outgoing_range |
| { |
| public: |
| outgoing_range (); |
| ~outgoing_range (); |
| gimple *edge_range_p (irange &r, edge e); |
| private: |
| void calc_switch_ranges (gswitch *sw); |
| bool get_edge_range (irange &r, gimple *s, edge e); |
| |
| hash_map<edge, irange *> *m_edge_table; |
| irange_allocator m_range_allocator; |
| }; |
| |
| // If there is a range control statment at the end of block BB, return it. |
| gimple *gimple_outgoing_range_stmt_p (basic_block bb); |
| |
| #endif // GIMPLE_RANGE_EDGE_H |