| /* Support routines for Value Range Propagation (VRP). |
| Copyright (C) 2016-2020 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 |
| |
| #include "value-range.h" |
| |
| /* Note value_range_equiv cannot currently be used with GC memory, |
| only value_range is fully set up for this. */ |
| class GTY((user)) value_range_equiv : public value_range |
| { |
| public: |
| value_range_equiv (); |
| value_range_equiv (const value_range &); |
| /* Deep-copies equiv bitmap argument. */ |
| value_range_equiv (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE); |
| |
| /* Shallow-copies equiv bitmap. */ |
| value_range_equiv (const value_range_equiv &) /* = delete */; |
| /* Shallow-copies equiv bitmap. */ |
| value_range_equiv& operator=(const value_range_equiv &) /* = delete */; |
| |
| /* Move equiv bitmap from source range. */ |
| void move (value_range_equiv *); |
| |
| /* Leaves equiv bitmap alone. */ |
| void update (tree, tree, value_range_kind = VR_RANGE); |
| /* Deep-copies equiv bitmap argument. */ |
| void set (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE); |
| void set (tree); |
| |
| bool operator== (const value_range_equiv &) const /* = delete */; |
| bool operator!= (const value_range_equiv &) const /* = delete */; |
| void intersect (const value_range_equiv *); |
| void union_ (const value_range_equiv *); |
| bool equal_p (const value_range_equiv &, bool ignore_equivs) const; |
| |
| /* Types of value ranges. */ |
| void set_undefined (); |
| void set_varying (tree); |
| |
| /* Equivalence bitmap methods. */ |
| bitmap equiv () const; |
| void equiv_clear (); |
| void equiv_add (const_tree, const value_range_equiv *, |
| bitmap_obstack * = NULL); |
| |
| /* Misc methods. */ |
| void deep_copy (const value_range_equiv *); |
| void dump (FILE *) const; |
| void dump () const; |
| |
| private: |
| /* Deep-copies bitmap argument. */ |
| void set_equiv (bitmap); |
| void check (); |
| |
| /* 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 m_equiv; |
| }; |
| |
| inline |
| value_range_equiv::value_range_equiv () |
| : value_range () |
| { |
| m_equiv = NULL; |
| } |
| |
| inline bitmap |
| value_range_equiv::equiv () const |
| { |
| return m_equiv; |
| } |
| |
| extern void dump_value_range (FILE *, const value_range_equiv *); |
| |
| 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 bool infer_value_range (gimple *, tree, tree_code *, tree *); |
| |
| extern bool range_int_cst_p (const value_range *); |
| |
| extern int compare_values (tree, tree); |
| extern int compare_values_warnv (tree, tree, bool *); |
| extern int operand_less_p (tree, tree); |
| |
| void range_fold_unary_expr (value_range *, enum tree_code, tree type, |
| const value_range *, tree op0_type); |
| void range_fold_binary_expr (value_range *, enum tree_code, tree type, |
| const value_range *, const value_range *); |
| |
| extern enum value_range_kind intersect_range_with_nonzero_bits |
| (enum value_range_kind, wide_int *, wide_int *, const wide_int &, signop); |
| |
| 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 overflow_comparison_p (tree_code, tree, tree, bool, tree *); |
| extern tree get_single_symbol (tree, bool *, tree *); |
| extern void maybe_set_nonzero_bits (edge, tree); |
| extern value_range_kind determine_value_range (tree, wide_int *, wide_int *); |
| |
| #endif /* GCC_TREE_VRP_H */ |