59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
/* Gimple range edge header file.
|
|
Copyright (C) 2020-2023 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 evaluated 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 gimple_outgoing_range
|
|
{
|
|
public:
|
|
gimple_outgoing_range (int max_sw_edges = INT_MAX);
|
|
~gimple_outgoing_range ();
|
|
gimple *edge_range_p (irange &r, edge e);
|
|
private:
|
|
void calc_switch_ranges (gswitch *sw);
|
|
bool switch_edge_range (irange &r, gswitch *sw, edge e);
|
|
|
|
int m_max_edges;
|
|
hash_map<edge, irange *> *m_edge_table;
|
|
class obstack_vrange_allocator *m_range_allocator;
|
|
};
|
|
|
|
// If there is a range control statement at the end of block BB, return it.
|
|
gimple *gimple_outgoing_range_stmt_p (basic_block bb);
|
|
// Return the range on edge E if it is from a GCOND. Either TRUE or FALSE.
|
|
void gcond_edge_range (irange &r, edge e);
|
|
|
|
#endif // GIMPLE_RANGE_EDGE_H
|