mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-01 11:52:47 +00:00
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/* Interprocedural reference lists.
|
|
Copyright (C) 2010-2019 Free Software Foundation, Inc.
|
|
Contributed by Jan Hubicka
|
|
|
|
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/>. */
|
|
|
|
#include "config.h"
|
|
#include "system.h"
|
|
#include "coretypes.h"
|
|
#include "target.h"
|
|
#include "tree.h"
|
|
#include "cgraph.h"
|
|
|
|
/* Remove reference. */
|
|
|
|
void
|
|
ipa_ref::remove_reference ()
|
|
{
|
|
struct ipa_ref_list *list = referred_ref_list ();
|
|
struct ipa_ref_list *list2 = referring_ref_list ();
|
|
vec<ipa_ref_t, va_gc> *old_references = list2->references;
|
|
struct ipa_ref *last;
|
|
|
|
gcc_assert (list->referring[referred_index] == this);
|
|
|
|
last = list->referring.last ();
|
|
if (this != last)
|
|
{
|
|
if (use == IPA_REF_ALIAS)
|
|
{
|
|
/* If deleted item is IPA_REF_ALIAS, we have to move last
|
|
item of IPA_REF_LIST type to the deleted position. After that
|
|
we replace last node with deletion slot. */
|
|
struct ipa_ref *last_alias = list->last_alias ();
|
|
|
|
if (last_alias && referred_index < last_alias->referred_index
|
|
&& last_alias != last)
|
|
{
|
|
unsigned last_alias_index = last_alias->referred_index;
|
|
|
|
list->referring[referred_index] = last_alias;
|
|
list->referring[referred_index]->referred_index = referred_index;
|
|
|
|
/* New position for replacement is previous index
|
|
of the last_alias. */
|
|
referred_index = last_alias_index;
|
|
}
|
|
}
|
|
|
|
list->referring[referred_index] = list->referring.last ();
|
|
list->referring[referred_index]->referred_index= referred_index;
|
|
}
|
|
list->referring.pop ();
|
|
|
|
last = &list2->references->last ();
|
|
|
|
struct ipa_ref *ref = this;
|
|
|
|
if (ref != last)
|
|
{
|
|
*ref = *last;
|
|
ref->referred_ref_list ()->referring[referred_index] = ref;
|
|
}
|
|
list2->references->pop ();
|
|
gcc_assert (list2->references == old_references);
|
|
}
|
|
|
|
/* Return true when execution of reference can lead to return from
|
|
function. */
|
|
|
|
bool
|
|
ipa_ref::cannot_lead_to_return ()
|
|
{
|
|
return dyn_cast <cgraph_node *> (referring)->cannot_return_p ();
|
|
}
|
|
|
|
/* Return reference list this reference is in. */
|
|
|
|
struct ipa_ref_list *
|
|
ipa_ref::referring_ref_list (void)
|
|
{
|
|
return &referring->ref_list;
|
|
}
|
|
|
|
/* Return reference list this reference is in. */
|
|
|
|
struct ipa_ref_list *
|
|
ipa_ref::referred_ref_list (void)
|
|
{
|
|
return &referred->ref_list;
|
|
}
|