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1 : : /* Header file for gimple range inference.
2 : : Copyright (C) 2022-2024 Free Software Foundation, Inc.
3 : : Contributed by Andrew MacLeod <amacleod@redhat.com>.
4 : :
5 : : This file is part of GCC.
6 : :
7 : : GCC is free software; you can redistribute it and/or modify it under
8 : : the terms of the GNU General Public License as published by the Free
9 : : Software Foundation; either version 3, or (at your option) any later
10 : : version.
11 : :
12 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 : : for more details.
16 : :
17 : : You should have received a copy of the GNU General Public License
18 : : along with GCC; see the file COPYING3. If not see
19 : : <http://www.gnu.org/licenses/>. */
20 : :
21 : : #ifndef GCC_GIMPLE_RANGE_SIDE_H
22 : : #define GCC_GIMPLE_RANGE_SIDE_H
23 : :
24 : : // Inferred ranges are ranges which are applied to use operands as a by product
25 : : // of executing an operation.
26 : :
27 : : // This class manages an on-demand summary of inferred ranges for a statement.
28 : : // It can be instantiated as required and provides a list of inferred ranges.
29 : : // New inferred ranges should be added in the constructor of this class.
30 : :
31 : 2970604538 : class gimple_infer_range
32 : : {
33 : : public:
34 : : gimple_infer_range (gimple *s);
35 : 304491518 : inline unsigned num () const { return num_args; }
36 : 20221043 : inline tree name (unsigned index) const
37 : 20221043 : { gcc_checking_assert (index < num_args); return m_names[index]; }
38 : 33173936 : inline const vrange& range (unsigned index) const
39 : 33173936 : { gcc_checking_assert (index < num_args); return m_ranges[index]; }
40 : : void add_range (tree name, vrange &range);
41 : : void add_nonzero (tree name);
42 : : private:
43 : : void check_assume_func (gcall *call);
44 : : unsigned num_args;
45 : : static const int size_limit = 10;
46 : : tree m_names[size_limit];
47 : : Value_Range m_ranges[size_limit];
48 : : inline void bump_index () { if (num_args < size_limit - 1) num_args++; }
49 : : };
50 : :
51 : : // This class manages a list of inferred ranges for each basic block.
52 : : // As inferences are made, they can be registered to a block and later
53 : : // queried. When constructed with a TRUE flag, immediate uses chains are
54 : : // followed the first time a name is referenced and block populated if
55 : : // there are any inferred ranges.
56 : :
57 : : class infer_range_manager
58 : : {
59 : : public:
60 : : infer_range_manager (bool do_search);
61 : : ~infer_range_manager ();
62 : : void add_range (tree name, basic_block bb, const vrange &r);
63 : : void add_nonzero (tree name, basic_block bb);
64 : : bool has_range_p (tree name, basic_block bb);
65 : : bool has_range_p (basic_block bb);
66 : : bool maybe_adjust_range (vrange &r, tree name, basic_block bb);
67 : : private:
68 : : class exit_range_head
69 : : {
70 : : public:
71 : : bitmap m_names; // list of names with an outgoing range.
72 : : class exit_range *head;
73 : : int m_num_ranges;
74 : : exit_range *find_ptr (tree name);
75 : : };
76 : : void register_all_uses (tree name);
77 : : vec <exit_range_head> m_on_exit;
78 : : const vrange &get_nonzero (tree name);
79 : : vec <vrange *> m_nonzero;
80 : : bitmap m_seen;
81 : : bitmap_obstack m_bitmaps;
82 : : struct obstack m_list_obstack;
83 : : class vrange_allocator *m_range_allocator;
84 : : };
85 : :
86 : : #endif // GCC_GIMPLE_RANGE_SIDE_H
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