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/* Support routines for Value Range Propagation (VRP).
Copyright (C) 2016-2020 Free Software Foundation, Inc.
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 GCC_GIMPLE_SSA_EVRP_ANALYZE_H
#define GCC_GIMPLE_SSA_EVRP_ANALYZE_H
class evrp_range_analyzer
{
public:
evrp_range_analyzer (bool update_global_ranges);
~evrp_range_analyzer (void)
{
delete vr_values;
stack.release ();
}
void enter (basic_block);
void push_marker (void);
void pop_to_marker (void);
void leave (basic_block);
void record_ranges_from_stmt (gimple *, bool);
/* Main interface to retrieve range information. */
const value_range_equiv *get_value_range (const_tree op)
{ return vr_values->get_value_range (op); }
/* Record a new unwindable range. */
void push_value_range (tree var, value_range_equiv *vr);
/* Dump all the current value ranges. This is primarily
a debugging interface. */
void dump_all_value_ranges (FILE *fp)
{ vr_values->dump_all_value_ranges (fp); }
/* A bit of a wart. This should ideally go away. */
void vrp_visit_cond_stmt (gcond *cond, edge *e)
{ return vr_values->vrp_visit_cond_stmt (cond, e); }
/* Get the underlying vr_values class instance. If TRANSFER is
true, then we are transferring ownership. Else we keep ownership.
This should be converted to a unique_ptr. */
class vr_values *get_vr_values (void) { return vr_values; }
private:
DISABLE_COPY_AND_ASSIGN (evrp_range_analyzer);
class vr_values *vr_values;
void pop_value_range ();
value_range_equiv *try_find_new_range (tree, tree op, tree_code code,
tree limit);
void record_ranges_from_incoming_edge (basic_block);
void record_ranges_from_phis (basic_block);
void set_ssa_range_info (tree, value_range_equiv *);
/* STACK holds the old VR. */
auto_vec<std::pair <tree, value_range_equiv *> > stack;
/* True if we are updating global ranges, false otherwise. */
bool m_update_global_ranges;
};
#endif /* GCC_GIMPLE_SSA_EVRP_ANALYZE_H */
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