1 /* Header file for gimple ranger SSA cache.
2 Copyright (C) 2017-2021 Free Software Foundation, Inc.
3 Contributed by Andrew MacLeod <amacleod@redhat.com>.
5 This file is part of GCC.
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
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
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/>. */
21 #ifndef GCC_SSA_RANGE_CACHE_H
22 #define GCC_SSA_RANGE_CACHE_H
24 #include "gimple-range-gori.h"
26 // Class used to track non-null references of an SSA name. A vector
27 // of bitmaps indexed by SSA name is maintained. When indexed by
28 // basic block, an on-bit indicates there is a non-null dereference
29 // for that SSA in that block.
36 bool non_null_deref_p (tree name
, basic_block bb
, bool search_dom
= true);
39 void process_name (tree name
);
40 bitmap_obstack m_bitmaps
;
43 // This class manages a vector of pointers to ssa_block ranges. It
44 // provides the basis for the "range on entry" cache for all
47 class block_range_cache
51 ~block_range_cache ();
53 void set_bb_range (tree name
, const basic_block bb
, const irange
&r
);
54 bool get_bb_range (irange
&r
, tree name
, const basic_block bb
);
55 bool bb_range_p (tree name
, const basic_block bb
);
58 void dump (FILE *f
, basic_block bb
, bool print_varying
= true);
60 vec
<class ssa_block_ranges
*> m_ssa_ranges
;
61 ssa_block_ranges
&get_block_ranges (tree name
);
62 ssa_block_ranges
*query_block_ranges (tree name
);
63 irange_allocator
*m_irange_allocator
;
64 bitmap_obstack m_bitmaps
;
67 // This global cache is used with the range engine as markers for what
68 // has been visited during this incarnation. Once the ranger evaluates
69 // a name, it is typically not re-evaluated again.
71 class ssa_global_cache
76 bool get_global_range (irange
&r
, tree name
) const;
77 bool set_global_range (tree name
, const irange
&r
);
78 void clear_global_range (tree name
);
80 void dump (FILE *f
= stderr
);
83 class irange_allocator
*m_irange_allocator
;
86 // This class provides all the caches a global ranger may need, and makes
87 // them available for gori-computes to query so outgoing edges can be
88 // properly calculated.
90 class ranger_cache
: public range_query
93 ranger_cache (class gimple_ranger
&q
);
96 virtual bool range_of_expr (irange
&r
, tree name
, gimple
*stmt
);
97 virtual bool range_on_edge (irange
&r
, edge e
, tree expr
);
98 bool block_range (irange
&r
, basic_block bb
, tree name
, bool calc
= true);
100 bool get_global_range (irange
&r
, tree name
) const;
101 bool get_non_stale_global_range (irange
&r
, tree name
);
102 void set_global_range (tree name
, const irange
&r
);
104 bool enable_new_values (bool state
);
105 non_null_ref m_non_null
;
108 void dump_bb (FILE *f
, basic_block bb
);
109 virtual void dump (FILE *f
) OVERRIDE
;
111 ssa_global_cache m_globals
;
112 block_range_cache m_on_entry
;
113 class temporal_cache
*m_temporal
;
114 void add_to_update (basic_block bb
);
115 void fill_block_cache (tree name
, basic_block bb
, basic_block def_bb
);
116 void propagate_cache (tree name
);
118 void range_of_def (irange
&r
, tree name
, basic_block bb
);
119 void entry_range (irange
&r
, tree expr
, basic_block bb
);
120 void exit_range (irange
&r
, tree expr
, basic_block bb
);
122 void propagate_updated_value (tree name
, basic_block bb
);
124 vec
<basic_block
> m_workback
;
125 vec
<basic_block
> m_update_list
;
127 // Iterative "poor value" calculations.
130 basic_block bb
; // Block which value needs to be calculated in.
131 tree calc
; // SSA_NAME which needs its value calculated.
133 bool push_poor_value (basic_block bb
, tree name
);
134 vec
<update_record
> m_poor_value_list
;
135 class gimple_ranger
&query
;
139 #endif // GCC_SSA_RANGE_CACHE_H