59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
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/* Gimple range edge header file.
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Copyright (C) 2020-2023 Free Software Foundation, Inc.
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Contributed by Andrew MacLeod <amacleod@redhat.com>
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and Aldy Hernandez <aldyh@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GIMPLE_RANGE_EDGE_H
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#define GIMPLE_RANGE_EDGE_H
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// This class is used to query ranges on constant edges in GIMPLE.
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//
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// For a COND_EXPR, the TRUE edge will return [1,1] and the false edge a [0,0].
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//
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// For SWITCH_EXPR, it is awkward to calculate ranges. When a request
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// is made, the entire switch is evaluated and the results cached.
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// Any future requests to that switch will use the cached value, providing
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// dramatic decrease in computation time.
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//
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// The API is simple, just ask for the range on the edge.
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// The return value is NULL for no range, or the branch statement which the
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// edge gets the range from, along with the range.
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class gimple_outgoing_range
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{
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public:
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gimple_outgoing_range (int max_sw_edges = INT_MAX);
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~gimple_outgoing_range ();
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gimple *edge_range_p (irange &r, edge e);
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private:
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void calc_switch_ranges (gswitch *sw);
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bool switch_edge_range (irange &r, gswitch *sw, edge e);
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int m_max_edges;
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hash_map<edge, irange *> *m_edge_table;
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class obstack_vrange_allocator *m_range_allocator;
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};
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// If there is a range control statement at the end of block BB, return it.
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gimple *gimple_outgoing_range_stmt_p (basic_block bb);
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// Return the range on edge E if it is from a GCOND. Either TRUE or FALSE.
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void gcond_edge_range (irange &r, edge e);
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#endif // GIMPLE_RANGE_EDGE_H
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