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/* Support routines for Value Range Propagation (VRP).
Copyright (C) 2016-2017 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 (void);
~evrp_range_analyzer (void)
{
delete vr_values;
stack.release ();
}
void enter (basic_block);
void leave (basic_block);
void record_ranges_from_stmt (gimple *);
/* Main interface to retrieve range information. */
value_range *get_value_range (const_tree op)
{ return vr_values->get_value_range (op); }
/* 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 (bool transfer)
{
class vr_values *x = vr_values;
if (transfer)
vr_values = NULL;
return x;
}
private:
DISABLE_COPY_AND_ASSIGN (evrp_range_analyzer);
class vr_values *vr_values;
void push_value_range (tree var, value_range *vr);
value_range *pop_value_range (tree var);
value_range *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);
/* STACK holds the old VR. */
auto_vec<std::pair <tree, value_range*> > stack;
};
#endif /* GCC_GIMPLE_SSA_EVRP_ANALYZE_H */