f86c2e7196
2019-07-31 Richard Biener <rguenther@suse.de> * vr-values.h (vr_values::swap_vr_value): New. (vr_values::free_value_range): likewise. * vr-values.c (vr_values::swap_vr_value): Implement. * gimple-ssa-evrp-analyze.h (evrp_range_analyzer::pop_value_range): Do not return a range or take a var. (evrp_range_analyzer::stack): Change back to recording a non-const value_range *. * gimple-ssa-evrp-analyze.c (evrp_range_analyzer::record_ranges_from_stmt): Free unused value-range. (evrp_range_analyzer::pop_to_marker): Adjust. (evrp_range_analyzer::push_value_range): Use new swap_vr_value. (evrp_range_analyzer::pop_value_range): Likewise. Free the no longer needed value-range. From-SVN: r273930
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/* Support routines for Value Range Propagation (VRP).
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Copyright (C) 2016-2019 Free Software Foundation, Inc.
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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 GCC_GIMPLE_SSA_EVRP_ANALYZE_H
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#define GCC_GIMPLE_SSA_EVRP_ANALYZE_H
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class evrp_range_analyzer
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{
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public:
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evrp_range_analyzer (bool update_global_ranges);
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~evrp_range_analyzer (void)
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{
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delete vr_values;
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stack.release ();
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}
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void enter (basic_block);
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void push_marker (void);
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void pop_to_marker (void);
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void leave (basic_block);
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void record_ranges_from_stmt (gimple *, bool);
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/* Main interface to retrieve range information. */
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const value_range *get_value_range (const_tree op)
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{ return vr_values->get_value_range (op); }
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/* Record a new unwindable range. */
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void push_value_range (tree var, value_range *vr);
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/* Dump all the current value ranges. This is primarily
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a debugging interface. */
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void dump_all_value_ranges (FILE *fp)
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{ vr_values->dump_all_value_ranges (fp); }
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/* A bit of a wart. This should ideally go away. */
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void vrp_visit_cond_stmt (gcond *cond, edge *e)
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{ return vr_values->vrp_visit_cond_stmt (cond, e); }
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/* Get the underlying vr_values class instance. If TRANSFER is
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true, then we are transferring ownership. Else we keep ownership.
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This should be converted to a unique_ptr. */
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class vr_values *get_vr_values (void) { return vr_values; }
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private:
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DISABLE_COPY_AND_ASSIGN (evrp_range_analyzer);
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class vr_values *vr_values;
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void pop_value_range ();
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value_range *try_find_new_range (tree, tree op, tree_code code, tree limit);
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void record_ranges_from_incoming_edge (basic_block);
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void record_ranges_from_phis (basic_block);
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void set_ssa_range_info (tree, value_range *);
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/* STACK holds the old VR. */
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auto_vec<std::pair <tree, value_range *> > stack;
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/* True if we are updating global ranges, false otherwise. */
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bool m_update_global_ranges;
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};
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#endif /* GCC_GIMPLE_SSA_EVRP_ANALYZE_H */
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