gcc/gimple-range.h

/* Header file for the GIMPLE range interface.
   Copyright (C) 2019-2021 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 GCC_GIMPLE_RANGE_H
#define GCC_GIMPLE_RANGE_H


#include "range.h"
#include "value-query.h"
#include "range-op.h"
#include "gimple-range-edge.h"
#include "gimple-range-fold.h"
#include "gimple-range-gori.h"
#include "gimple-range-cache.h"

// This is the basic range generator interface.
//
// This base class provides all the API entry points, but only provides
// functionality at the statement level.  Ie, it can calculate ranges on
// statements, but does no additonal lookup.
//
// All the range_of_* methods will return a range if the types is
// supported by the range engine.  It may be the full range for the
// type, AKA varying_p or it may be a refined range.  If the range
// type is not supported, then false is returned.  Non-statement
// related methods return whatever the current global value is.


class gimple_ranger : public range_query
{
public:
  gimple_ranger ();
  virtual bool range_of_stmt (irange &r, gimple *, tree name = NULL) OVERRIDE;
  virtual bool range_of_expr (irange &r, tree name, gimple * = NULL) OVERRIDE;
  virtual bool range_on_edge (irange &r, edge e, tree name) OVERRIDE;
  virtual void range_on_entry (irange &r, basic_block bb, tree name);
  virtual void range_on_exit (irange &r, basic_block bb, tree name);
  void export_global_ranges ();
  inline gori_compute &gori ()  { return m_cache.m_gori; }
  virtual void dump (FILE *f) OVERRIDE;
  void dump_bb (FILE *f, basic_block bb);
protected:
  bool fold_range_internal (irange &r, gimple *s, tree name);
  ranger_cache m_cache;
};


// This class overloads the ranger routines to provide tracing facilties
// Entry and exit values to each of the APIs is placed in the dumpfile.

class trace_ranger : public gimple_ranger
{
public:
  trace_ranger ();
  virtual bool range_of_stmt (irange &r, gimple *s, tree name = NULL_TREE);
  virtual bool range_of_expr (irange &r, tree name, gimple *s = NULL);
  virtual bool range_on_edge (irange &r, edge e, tree name);
  virtual void range_on_entry (irange &r, basic_block bb, tree name);
  virtual void range_on_exit (irange &r, basic_block bb, tree name);
private:
  static const unsigned bump = 2;
  unsigned indent;
  unsigned trace_count;		// Current trace index count.

  bool dumping (unsigned counter, bool trailing = false);
  bool trailer (unsigned counter, const char *caller, bool result, tree name,
		const irange &r);
};

// Flag to enable debugging the various internal Caches.
#define DEBUG_RANGE_CACHE (dump_file && (param_evrp_mode & EVRP_MODE_DEBUG))

extern gimple_ranger *enable_ranger (struct function *);
extern void disable_ranger (struct function *);

#endif // GCC_GIMPLE_RANGE_H