| /* Support routines for Value Range Propagation (VRP). |
| Copyright (C) 2016-2021 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 vr_values |
| { |
| public: |
| evrp_range_analyzer (bool update_global_ranges); |
| ~evrp_range_analyzer (void) |
| { |
| 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); |
| |
| /* Record a new unwindable range. */ |
| void push_value_range (tree var, value_range_equiv *vr); |
| |
| private: |
| DISABLE_COPY_AND_ASSIGN (evrp_range_analyzer); |
| |
| 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 */ |