| /* 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_TREE_VRP_H |
| #define GCC_TREE_VRP_H |
| |
| /* Type of value ranges. See value_range below for a |
| description of these types. */ |
| enum value_range_type { VR_UNDEFINED, VR_RANGE, |
| VR_ANTI_RANGE, VR_VARYING, VR_LAST }; |
| |
| /* Range of values that can be associated with an SSA_NAME after VRP |
| has executed. */ |
| struct GTY((for_user)) value_range |
| { |
| /* Lattice value represented by this range. */ |
| enum value_range_type type; |
| |
| /* Minimum and maximum values represented by this range. These |
| values should be interpreted as follows: |
| |
| - If TYPE is VR_UNDEFINED or VR_VARYING then MIN and MAX must |
| be NULL. |
| |
| - If TYPE == VR_RANGE then MIN holds the minimum value and |
| MAX holds the maximum value of the range [MIN, MAX]. |
| |
| - If TYPE == ANTI_RANGE the variable is known to NOT |
| take any values in the range [MIN, MAX]. */ |
| tree min; |
| tree max; |
| |
| /* Set of SSA names whose value ranges are equivalent to this one. |
| This set is only valid when TYPE is VR_RANGE or VR_ANTI_RANGE. */ |
| bitmap equiv; |
| }; |
| |
| extern void vrp_intersect_ranges (value_range *vr0, value_range *vr1); |
| extern void vrp_meet (value_range *vr0, const value_range *vr1); |
| extern void dump_value_range (FILE *, const value_range *); |
| extern void extract_range_from_unary_expr (value_range *vr, |
| enum tree_code code, |
| tree type, |
| value_range *vr0_, |
| tree op0_type); |
| |
| extern bool vrp_operand_equal_p (const_tree, const_tree); |
| |
| struct assert_info |
| { |
| /* Predicate code for the ASSERT_EXPR. Must be COMPARISON_CLASS_P. */ |
| enum tree_code comp_code; |
| |
| /* Name to register the assert for. */ |
| tree name; |
| |
| /* Value being compared against. */ |
| tree val; |
| |
| /* Expression to compare. */ |
| tree expr; |
| }; |
| |
| extern void register_edge_assert_for (tree, edge, enum tree_code, |
| tree, tree, vec<assert_info> &); |
| extern bool stmt_interesting_for_vrp (gimple *); |
| extern void set_value_range_to_varying (value_range *); |
| extern int range_includes_zero_p (tree, tree); |
| extern bool infer_value_range (gimple *, tree, tree_code *, tree *); |
| |
| extern void set_value_range_to_nonnull (value_range *, tree); |
| extern void set_value_range (value_range *, enum value_range_type, tree, |
| tree, bitmap); |
| extern void set_and_canonicalize_value_range (value_range *, |
| enum value_range_type, |
| tree, tree, bitmap); |
| extern bool vrp_bitmap_equal_p (const_bitmap, const_bitmap); |
| extern bool range_is_nonnull (value_range *); |
| extern tree value_range_constant_singleton (value_range *); |
| extern bool symbolic_range_p (value_range *); |
| extern int compare_values (tree, tree); |
| extern int compare_values_warnv (tree, tree, bool *); |
| extern bool vrp_val_is_min (const_tree); |
| extern bool vrp_val_is_max (const_tree); |
| extern void copy_value_range (value_range *, value_range *); |
| extern void set_value_range_to_value (value_range *, tree, bitmap); |
| extern void extract_range_from_binary_expr_1 (value_range *, enum tree_code, |
| tree, value_range *, |
| value_range *); |
| extern tree vrp_val_min (const_tree); |
| extern tree vrp_val_max (const_tree); |
| extern void set_value_range_to_null (value_range *, tree); |
| extern bool range_int_cst_p (value_range *); |
| extern int operand_less_p (tree, tree); |
| extern bool find_case_label_range (gswitch *, tree, tree, size_t *, size_t *); |
| extern bool find_case_label_index (gswitch *, size_t, tree, size_t *); |
| extern bool zero_nonzero_bits_from_vr (const tree, value_range *, |
| wide_int *, wide_int *); |
| extern bool overflow_comparison_p (tree_code, tree, tree, bool, tree *); |
| extern bool range_int_cst_singleton_p (value_range *); |
| extern int value_inside_range (tree, tree, tree); |
| extern tree get_single_symbol (tree, bool *, tree *); |
| |
| |
| struct switch_update { |
| gswitch *stmt; |
| tree vec; |
| }; |
| |
| extern vec<edge> to_remove_edges; |
| extern vec<switch_update> to_update_switch_stmts; |
| |
| #endif /* GCC_TREE_VRP_H */ |