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/* Interprocedural reference lists.
Copyright (C) 2010
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 "tree.h"
#include "ggc.h"
#include "target.h"
#include "cgraph.h"
static const char *ipa_ref_use_name[] = {"read","write","addr"};
/* Return ipa reference from REFERING_NODE or REFERING_VARPOOL_NODE
to REFERED_NODE or REFERED_VARPOOL_NODE. USE_TYPE specify type
of the use and STMT the statement (if it exists). */
struct ipa_ref *
ipa_record_reference (struct cgraph_node *refering_node,
struct varpool_node *refering_varpool_node,
struct cgraph_node *refered_node,
struct varpool_node *refered_varpool_node,
enum ipa_ref_use use_type, gimple stmt)
{
struct ipa_ref *ref;
struct ipa_ref_list *list, *list2;
VEC(ipa_ref_t,gc) *old_references;
gcc_assert ((!refering_node) ^ (!refering_varpool_node));
gcc_assert ((!refered_node) ^ (!refered_varpool_node));
gcc_assert (!stmt || refering_node);
list = (refering_node ? &refering_node->ref_list
: &refering_varpool_node->ref_list);
old_references = list->references;
VEC_safe_grow (ipa_ref_t, gc, list->references,
VEC_length (ipa_ref_t, list->references) + 1);
ref = VEC_last (ipa_ref_t, list->references);
list2 = (refered_node ? &refered_node->ref_list
: &refered_varpool_node->ref_list);
VEC_safe_push (ipa_ref_ptr, heap, list2->refering, ref);
ref->refered_index = VEC_length (ipa_ref_ptr, list2->refering) - 1;
if (refering_node)
{
ref->refering.cgraph_node = refering_node;
ref->refering_type = IPA_REF_CGRAPH;
}
else
{
ref->refering.varpool_node = refering_varpool_node;
ref->refering_type = IPA_REF_VARPOOL;
gcc_assert (use_type == IPA_REF_ADDR);
}
if (refered_node)
{
ref->refered.cgraph_node = refered_node;
ref->refered_type = IPA_REF_CGRAPH;
gcc_assert (use_type == IPA_REF_ADDR);
}
else
{
varpool_mark_needed_node (refered_varpool_node);
ref->refered.varpool_node = refered_varpool_node;
ref->refered_type = IPA_REF_VARPOOL;
}
ref->stmt = stmt;
ref->use = use_type;
/* If vector was moved in memory, update pointers. */
if (old_references != list->references)
{
int i;
for (i = 0; ipa_ref_list_reference_iterate (list, i, ref); i++)
VEC_replace (ipa_ref_ptr,
ipa_ref_refered_ref_list (ref)->refering,
ref->refered_index, ref);
}
return ref;
}
/* Remove reference REF. */
void
ipa_remove_reference (struct ipa_ref *ref)
{
struct ipa_ref_list *list = ipa_ref_refered_ref_list (ref);
struct ipa_ref_list *list2 = ipa_ref_refering_ref_list (ref);
VEC(ipa_ref_t,gc) *old_references = list2->references;
struct ipa_ref *last;
gcc_assert (VEC_index (ipa_ref_ptr, list->refering, ref->refered_index) == ref);
last = VEC_last (ipa_ref_ptr, list->refering);
if (ref != last)
{
VEC_replace (ipa_ref_ptr, list->refering,
ref->refered_index,
VEC_last (ipa_ref_ptr, list->refering));
VEC_index (ipa_ref_ptr, list->refering,
ref->refered_index)->refered_index = ref->refered_index;
}
VEC_pop (ipa_ref_ptr, list->refering);
last = VEC_last (ipa_ref_t, list2->references);
if (ref != last)
{
*ref = *last;
VEC_replace (ipa_ref_ptr,
ipa_ref_refered_ref_list (ref)->refering,
ref->refered_index, ref);
}
VEC_pop (ipa_ref_t, list2->references);
gcc_assert (list2->references == old_references);
}
/* Remove all references in ref list LIST. */
void
ipa_remove_all_references (struct ipa_ref_list *list)
{
while (VEC_length (ipa_ref_t, list->references))
ipa_remove_reference (VEC_last (ipa_ref_t, list->references));
VEC_free (ipa_ref_t, gc, list->references);
list->references = NULL;
}
/* Remove all references in ref list LIST. */
void
ipa_remove_all_refering (struct ipa_ref_list *list)
{
while (VEC_length (ipa_ref_ptr, list->refering))
ipa_remove_reference (VEC_last (ipa_ref_ptr, list->refering));
VEC_free (ipa_ref_ptr, heap, list->refering);
list->refering = NULL;
}
/* Dump references in LIST to FILE. */
void
ipa_dump_references (FILE * file, struct ipa_ref_list *list)
{
struct ipa_ref *ref;
int i;
for (i = 0; ipa_ref_list_reference_iterate (list, i, ref); i++)
{
if (ref->refered_type == IPA_REF_CGRAPH)
{
fprintf (file, " fn:%s/%i (%s)", cgraph_node_name (ipa_ref_node (ref)),
ipa_ref_node (ref)->uid,
ipa_ref_use_name [ref->use]);
}
else
fprintf (file, " var:%s (%s)",
varpool_node_name (ipa_ref_varpool_node (ref)),
ipa_ref_use_name [ref->use]);
}
fprintf (file, "\n");
}
/* Dump refering in LIST to FILE. */
void
ipa_dump_refering (FILE * file, struct ipa_ref_list *list)
{
struct ipa_ref *ref;
int i;
for (i = 0; ipa_ref_list_refering_iterate (list, i, ref); i++)
{
if (ref->refering_type == IPA_REF_CGRAPH)
fprintf (file, " fn:%s/%i (%s)",
cgraph_node_name (ipa_ref_refering_node (ref)),
ipa_ref_refering_node (ref)->uid,
ipa_ref_use_name [ref->use]);
else
fprintf (file, " var:%s (%s)",
varpool_node_name (ipa_ref_refering_varpool_node (ref)),
ipa_ref_use_name [ref->use]);
}
fprintf (file, "\n");
}
/* Clone all references from SRC to DEST_NODE or DEST_VARPOOL_NODE. */
void
ipa_clone_references (struct cgraph_node *dest_node,
struct varpool_node *dest_varpool_node,
struct ipa_ref_list *src)
{
struct ipa_ref *ref;
int i;
for (i = 0; ipa_ref_list_reference_iterate (src, i, ref); i++)
ipa_record_reference (dest_node, dest_varpool_node,
ref->refered_type == IPA_REF_CGRAPH
? ipa_ref_node (ref) : NULL,
ref->refered_type == IPA_REF_VARPOOL
? ipa_ref_varpool_node (ref) : NULL,
ref->use, ref->stmt);
}
/* Clone all refering from SRC to DEST_NODE or DEST_VARPOOL_NODE. */
void
ipa_clone_refering (struct cgraph_node *dest_node,
struct varpool_node *dest_varpool_node,
struct ipa_ref_list *src)
{
struct ipa_ref *ref;
int i;
for (i = 0; ipa_ref_list_refering_iterate (src, i, ref); i++)
ipa_record_reference (
ref->refering_type == IPA_REF_CGRAPH
? ipa_ref_refering_node (ref) : NULL,
ref->refering_type == IPA_REF_VARPOOL
? ipa_ref_refering_varpool_node (ref) : NULL,
dest_node, dest_varpool_node,
ref->use, ref->stmt);
}
/* Return true when execution of REF can load to return from
function. */
bool
ipa_ref_cannot_lead_to_return (struct ipa_ref *ref)
{
return cgraph_node_cannot_return (ipa_ref_refering_node (ref));
}
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