1 /* Support routines for Value Range Propagation (VRP). 2 Copyright (C) 2016-2018 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GCC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef GCC_GIMPLE_SSA_EVRP_ANALYZE_H 21 #define GCC_GIMPLE_SSA_EVRP_ANALYZE_H 22 23 class evrp_range_analyzer 24 { 25 public: 26 evrp_range_analyzer (void); 27 ~evrp_range_analyzer (void) 28 { 29 delete vr_values; 30 stack.release (); 31 } 32 33 void enter (basic_block); 34 void push_marker (void); 35 void pop_to_marker (void); 36 void leave (basic_block); 37 void record_ranges_from_stmt (gimple *, bool); 38 39 /* Main interface to retrieve range information. */ 40 value_range *get_value_range (const_tree op) 41 { return vr_values->get_value_range (op); } 42 43 /* Record a new unwindable range. */ 44 void push_value_range (tree var, value_range *vr); 45 46 /* Dump all the current value ranges. This is primarily 47 a debugging interface. */ 48 void dump_all_value_ranges (FILE *fp) 49 { vr_values->dump_all_value_ranges (fp); } 50 51 /* A bit of a wart. This should ideally go away. */ 52 void vrp_visit_cond_stmt (gcond *cond, edge *e) 53 { return vr_values->vrp_visit_cond_stmt (cond, e); } 54 55 /* Get the underlying vr_values class instance. If TRANSFER is 56 true, then we are transferring ownership. Else we keep ownership. 57 58 This should be converted to a unique_ptr. */ 59 class vr_values *get_vr_values (void) { return vr_values; } 60 61 private: 62 DISABLE_COPY_AND_ASSIGN (evrp_range_analyzer); 63 class vr_values *vr_values; 64 65 value_range *pop_value_range (tree var); 66 value_range *try_find_new_range (tree, tree op, tree_code code, tree limit); 67 void record_ranges_from_incoming_edge (basic_block); 68 void record_ranges_from_phis (basic_block); 69 void set_ssa_range_info (tree, value_range *); 70 71 /* STACK holds the old VR. */ 72 auto_vec<std::pair <tree, value_range*> > stack; 73 }; 74 75 #endif /* GCC_GIMPLE_SSA_EVRP_ANALYZE_H */ 76