aix: Fix _STDC_FORMAT_MACROS in inttypes.h [PR97044]
[official-gcc.git] / gcc / ipa-ref.c
blob241828ee973ea4276ac785a4142a60dbaf77dc6e
1 /* Interprocedural reference lists.
2 Copyright (C) 2010-2020 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka
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
10 version.
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.
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 #include "config.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "target.h"
25 #include "tree.h"
26 #include "cgraph.h"
28 /* Remove reference. */
30 void
31 ipa_ref::remove_reference ()
33 struct ipa_ref_list *list = referred_ref_list ();
34 struct ipa_ref_list *list2 = referring_ref_list ();
35 vec<ipa_ref_t, va_gc> *old_references = list2->references;
36 struct ipa_ref *last;
38 gcc_assert (list->referring[referred_index] == this);
40 last = list->referring.last ();
41 if (this != last)
43 if (use == IPA_REF_ALIAS)
45 /* If deleted item is IPA_REF_ALIAS, we have to move last
46 item of IPA_REF_LIST type to the deleted position. After that
47 we replace last node with deletion slot. */
48 struct ipa_ref *last_alias = list->last_alias ();
50 if (last_alias && referred_index < last_alias->referred_index
51 && last_alias != last)
53 unsigned last_alias_index = last_alias->referred_index;
55 list->referring[referred_index] = last_alias;
56 list->referring[referred_index]->referred_index = referred_index;
58 /* New position for replacement is previous index
59 of the last_alias. */
60 referred_index = last_alias_index;
64 list->referring[referred_index] = list->referring.last ();
65 list->referring[referred_index]->referred_index= referred_index;
67 list->referring.pop ();
69 last = &list2->references->last ();
71 struct ipa_ref *ref = this;
73 if (ref != last)
75 *ref = *last;
76 ref->referred_ref_list ()->referring[referred_index] = ref;
78 list2->references->pop ();
79 gcc_assert (list2->references == old_references);
82 /* Return true when execution of reference can lead to return from
83 function. */
85 bool
86 ipa_ref::cannot_lead_to_return ()
88 return dyn_cast <cgraph_node *> (referring)->cannot_return_p ();
91 /* Return reference list this reference is in. */
93 struct ipa_ref_list *
94 ipa_ref::referring_ref_list (void)
96 return &referring->ref_list;
99 /* Return reference list this reference is in. */
101 struct ipa_ref_list *
102 ipa_ref::referred_ref_list (void)
104 return &referred->ref_list;