| 1 | /* Gimple range edge header file. |
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| 2 | Copyright (C) 2020-2023 Free Software Foundation, Inc. |
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| 3 | Contributed by Andrew MacLeod <amacleod@redhat.com> |
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| 4 | and Aldy Hernandez <aldyh@redhat.com>. |
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| 5 | |
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| 6 | This file is part of GCC. |
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| 7 | |
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| 8 | GCC is free software; you can redistribute it and/or modify |
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| 9 | it under the terms of the GNU General Public License as published by |
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| 10 | the Free Software Foundation; either version 3, or (at your option) |
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| 11 | any later version. |
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| 12 | |
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| 13 | GCC is distributed in the hope that it will be useful, |
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | GNU General Public License for more details. |
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| 17 | |
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| 18 | You should have received a copy of the GNU General Public License |
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| 19 | along with GCC; see the file COPYING3. If not see |
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| 20 | <http://www.gnu.org/licenses/>. */ |
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| 21 | |
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| 22 | #ifndef GIMPLE_RANGE_EDGE_H |
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| 23 | #define GIMPLE_RANGE_EDGE_H |
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| 24 | |
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| 25 | // This class is used to query ranges on constant edges in GIMPLE. |
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| 26 | // |
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| 27 | // For a COND_EXPR, the TRUE edge will return [1,1] and the false edge a [0,0]. |
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| 28 | // |
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| 29 | // For SWITCH_EXPR, it is awkward to calculate ranges. When a request |
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| 30 | // is made, the entire switch is evaluated and the results cached. |
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| 31 | // Any future requests to that switch will use the cached value, providing |
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| 32 | // dramatic decrease in computation time. |
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| 33 | // |
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| 34 | // The API is simple, just ask for the range on the edge. |
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| 35 | // The return value is NULL for no range, or the branch statement which the |
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| 36 | // edge gets the range from, along with the range. |
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| 37 | |
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| 38 | class gimple_outgoing_range |
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| 39 | { |
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| 40 | public: |
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| 41 | gimple_outgoing_range (int max_sw_edges = INT_MAX); |
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| 42 | ~gimple_outgoing_range (); |
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| 43 | gimple *edge_range_p (irange &r, edge e); |
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| 44 | private: |
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| 45 | void calc_switch_ranges (gswitch *sw); |
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| 46 | bool switch_edge_range (irange &r, gswitch *sw, edge e); |
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| 47 | |
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| 48 | int m_max_edges; |
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| 49 | hash_map<edge, vrange_storage *> *m_edge_table; |
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| 50 | class vrange_allocator *m_range_allocator; |
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| 51 | }; |
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| 52 | |
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| 53 | // If there is a range control statement at the end of block BB, return it. |
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| 54 | gimple *gimple_outgoing_range_stmt_p (basic_block bb); |
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| 55 | // Return the range on edge E if it is from a GCOND. Either TRUE or FALSE. |
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| 56 | void gcond_edge_range (irange &r, edge e); |
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| 57 | |
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| 58 | #endif // GIMPLE_RANGE_EDGE_H |
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| 59 | |
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