1 /* Utilities for ipa analysis.
2 Copyright (C) 2004-2018 Free Software Foundation, Inc.
3 Contributed by Kenneth Zadeck <zadeck@naturalbridge.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_IPA_UTILS_H
22 #define GCC_IPA_UTILS_H
27 /* This field will have the samy value for any two nodes in the same strongly
28 connected component. */
32 struct cgraph_node
* next_cycle
;
38 void ipa_print_order (FILE*, const char *, struct cgraph_node
**, int);
39 int ipa_reduced_postorder (struct cgraph_node
**, bool, bool,
40 bool (*ignore_edge
) (struct cgraph_edge
*));
41 void ipa_free_postorder_info (void);
42 vec
<cgraph_node
*> ipa_get_nodes_in_cycle (struct cgraph_node
*);
43 bool ipa_edge_within_scc (struct cgraph_edge
*);
44 int ipa_reverse_postorder (struct cgraph_node
**);
45 tree
get_base_var (tree
);
46 void ipa_merge_profiles (struct cgraph_node
*dst
,
47 struct cgraph_node
*src
, bool preserve_body
= false);
48 bool recursive_call_p (tree
, tree
);
50 /* In ipa-profile.c */
51 bool ipa_propagate_frequency (struct cgraph_node
*node
);
56 typedef odr_type_d
*odr_type
;
57 void build_type_inheritance_graph (void);
58 void rebuild_type_inheritance_graph (void);
59 void update_type_inheritance_graph (void);
61 possible_polymorphic_call_targets (tree
, HOST_WIDE_INT
,
62 ipa_polymorphic_call_context
,
63 bool *copletep
= NULL
,
64 void **cache_token
= NULL
,
65 bool speuclative
= false);
66 odr_type
get_odr_type (tree
, bool insert
= false);
67 bool odr_type_p (const_tree
);
68 bool possible_polymorphic_call_target_p (tree ref
, gimple
*stmt
, struct cgraph_node
*n
);
69 void dump_possible_polymorphic_call_targets (FILE *, tree
, HOST_WIDE_INT
,
70 const ipa_polymorphic_call_context
&);
71 bool possible_polymorphic_call_target_p (tree
, HOST_WIDE_INT
,
72 const ipa_polymorphic_call_context
&,
73 struct cgraph_node
*);
74 tree
polymorphic_ctor_dtor_p (tree
, bool);
75 tree
inlined_polymorphic_ctor_dtor_block_p (tree
, bool);
76 bool decl_maybe_in_construction_p (tree
, tree
, gimple
*, tree
);
77 tree
vtable_pointer_value_to_binfo (const_tree
);
78 bool vtable_pointer_value_to_vtable (const_tree
, tree
*, unsigned HOST_WIDE_INT
*);
79 tree
subbinfo_with_vtable_at_offset (tree
, unsigned HOST_WIDE_INT
, tree
);
80 void compare_virtual_tables (varpool_node
*, varpool_node
*);
81 bool type_all_derivations_known_p (const_tree
);
82 bool type_known_to_have_no_derivations_p (tree
);
83 bool contains_polymorphic_type_p (const_tree
);
84 void register_odr_type (tree
);
85 bool types_must_be_same_for_odr (tree
, tree
);
86 bool types_odr_comparable (tree
, tree
, bool strict
= false);
87 cgraph_node
*try_speculative_devirtualization (tree
, HOST_WIDE_INT
,
88 ipa_polymorphic_call_context
);
89 void warn_types_mismatch (tree t1
, tree t2
, location_t loc1
= UNKNOWN_LOCATION
,
90 location_t loc2
= UNKNOWN_LOCATION
);
91 bool odr_or_derived_type_p (const_tree t
);
92 bool odr_types_equivalent_p (tree type1
, tree type2
);
94 /* Return vector containing possible targets of polymorphic call E.
95 If COMPLETEP is non-NULL, store true if the list is complete.
96 CACHE_TOKEN (if non-NULL) will get stored to an unique ID of entry
97 in the target cache. If user needs to visit every target list
98 just once, it can memoize them.
100 Returned vector is placed into cache. It is NOT caller's responsibility
101 to free it. The vector can be freed on cgraph_remove_node call if
102 the particular node is a virtual function present in the cache. */
104 inline vec
<cgraph_node
*>
105 possible_polymorphic_call_targets (struct cgraph_edge
*e
,
106 bool *completep
= NULL
,
107 void **cache_token
= NULL
,
108 bool speculative
= false)
110 ipa_polymorphic_call_context
context(e
);
112 return possible_polymorphic_call_targets (e
->indirect_info
->otr_type
,
113 e
->indirect_info
->otr_token
,
115 completep
, cache_token
,
119 /* Same as above but taking OBJ_TYPE_REF as an parameter. */
121 inline vec
<cgraph_node
*>
122 possible_polymorphic_call_targets (tree ref
,
124 bool *completep
= NULL
,
125 void **cache_token
= NULL
)
127 ipa_polymorphic_call_context
context (current_function_decl
, ref
, call
);
129 return possible_polymorphic_call_targets (obj_type_ref_class (ref
),
131 (OBJ_TYPE_REF_TOKEN (ref
)),
133 completep
, cache_token
);
136 /* Dump possible targets of a polymorphic call E into F. */
139 dump_possible_polymorphic_call_targets (FILE *f
, struct cgraph_edge
*e
)
141 ipa_polymorphic_call_context
context(e
);
143 dump_possible_polymorphic_call_targets (f
, e
->indirect_info
->otr_type
,
144 e
->indirect_info
->otr_token
,
148 /* Return true if N can be possibly target of a polymorphic call of
152 possible_polymorphic_call_target_p (struct cgraph_edge
*e
,
153 struct cgraph_node
*n
)
155 ipa_polymorphic_call_context
context(e
);
157 return possible_polymorphic_call_target_p (e
->indirect_info
->otr_type
,
158 e
->indirect_info
->otr_token
,
162 /* Return true if BINFO corresponds to a type with virtual methods.
164 Every type has several BINFOs. One is the BINFO associated by the type
165 while other represents bases of derived types. The BINFOs representing
166 bases do not have BINFO_VTABLE pointer set when this is the single
167 inheritance (because vtables are shared). Look up the BINFO of type
168 and check presence of its vtable. */
171 polymorphic_type_binfo_p (const_tree binfo
)
173 return (BINFO_TYPE (binfo
) && TYPE_BINFO (BINFO_TYPE (binfo
))
174 && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (binfo
))));
177 /* Return true if T is a type with linkage defined. */
180 type_with_linkage_p (const_tree t
)
182 if (!TYPE_NAME (t
) || TREE_CODE (TYPE_NAME (t
)) != TYPE_DECL
)
185 /* To support -fno-lto-odr-type-merigng recognize types with vtables
187 if (RECORD_OR_UNION_TYPE_P (t
)
188 && TYPE_BINFO (t
) && BINFO_VTABLE (TYPE_BINFO (t
)))
191 /* After free_lang_data was run and -flto-odr-type-merging we can recongize
192 types with linkage by presence of mangled name. */
193 if (DECL_ASSEMBLER_NAME_SET_P (TYPE_NAME (t
)))
196 /* If free lang data was not run check if indeed the type looks like C++
197 type with linkage. */
198 if (in_lto_p
|| !TYPE_STUB_DECL (t
))
201 if (!RECORD_OR_UNION_TYPE_P (t
) && TREE_CODE (t
) != ENUMERAL_TYPE
)
204 /* Builtin types do not define linkage, their TYPE_CONTEXT is NULL. */
205 if (!TYPE_CONTEXT (t
))
211 /* Return true if T is in anonymous namespace.
212 This works only on those C++ types with linkage defined. */
215 type_in_anonymous_namespace_p (const_tree t
)
217 gcc_checking_assert (type_with_linkage_p (t
));
219 /* free_lang_data clears TYPE_STUB_DECL but sets assembler name to
221 if (DECL_ASSEMBLER_NAME_SET_P (TYPE_NAME (t
)))
222 return !strcmp ("<anon>",
224 (DECL_ASSEMBLER_NAME (TYPE_NAME (t
))));
225 else if (!TYPE_STUB_DECL (t
))
228 return !TREE_PUBLIC (TYPE_STUB_DECL (t
));
231 /* Return true of T is type with One Definition Rule info attached.
232 It means that either it is anonymous type or it has assembler name
236 odr_type_p (const_tree t
)
238 /* We do not have this information when not in LTO, but we do not need
239 to care, since it is used only for type merging. */
240 gcc_checking_assert (in_lto_p
|| flag_lto
);
242 if (!type_with_linkage_p (t
))
245 /* To support -fno-lto-odr-type-merging consider types with vtables ODR. */
246 if (type_in_anonymous_namespace_p (t
))
249 if (TYPE_NAME (t
) && DECL_ASSEMBLER_NAME_SET_P (TYPE_NAME (t
)))
251 /* C++ FE uses magic <anon> as assembler names of anonymous types.
252 verify that this match with type_in_anonymous_namespace_p. */
253 gcc_checking_assert (strcmp ("<anon>",
255 (DECL_ASSEMBLER_NAME (TYPE_NAME (t
)))));
261 #endif /* GCC_IPA_UTILS_H */