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/* IPA 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/>. */
struct cgraph_node;
struct varpool_node;
/* How the reference is done. */
enum GTY(()) ipa_ref_use
{
IPA_REF_LOAD,
IPA_REF_STORE,
IPA_REF_ADDR,
IPA_REF_ALIAS
};
/* Type of refering or refered type. */
enum GTY(()) ipa_ref_type
{
IPA_REF_CGRAPH,
IPA_REF_VARPOOL
};
/* We can have references spanning both callgraph and varpool,
so all pointers needs to be of both types. */
union GTY(()) ipa_ref_ptr_u
{
struct cgraph_node * GTY((tag ("IPA_REF_CGRAPH"))) cgraph_node;
struct varpool_node * GTY((tag ("IPA_REF_VARPOOL"))) varpool_node;
};
/* Record of reference in callgraph or varpool. */
struct GTY(()) ipa_ref
{
union ipa_ref_ptr_u GTY ((desc ("%1.refering_type"))) refering;
union ipa_ref_ptr_u GTY ((desc ("%1.refered_type"))) refered;
gimple stmt;
unsigned int refered_index;
ENUM_BITFIELD (ipa_ref_type) refering_type:1;
ENUM_BITFIELD (ipa_ref_type) refered_type:1;
ENUM_BITFIELD (ipa_ref_use) use:2;
};
typedef struct ipa_ref ipa_ref_t;
typedef struct ipa_ref *ipa_ref_ptr;
DEF_VEC_O(ipa_ref_t);
DEF_VEC_ALLOC_O(ipa_ref_t,gc);
DEF_VEC_P(ipa_ref_ptr);
DEF_VEC_ALLOC_P(ipa_ref_ptr,heap);
/* List of references. This is stored in both callgraph and varpool nodes. */
struct GTY(()) ipa_ref_list
{
/* Store actual references in references vector. */
VEC(ipa_ref_t,gc) *references;
/* Refering is vector of pointers to references. It must not live in GGC space
or GGC will try to mark middle of references vectors. */
VEC(ipa_ref_ptr,heap) * GTY((skip)) refering;
};
struct ipa_ref * ipa_record_reference (struct cgraph_node *,
struct varpool_node *,
struct cgraph_node *,
struct varpool_node *,
enum ipa_ref_use, gimple);
void ipa_remove_reference (struct ipa_ref *);
void ipa_remove_all_references (struct ipa_ref_list *);
void ipa_remove_all_refering (struct ipa_ref_list *);
void ipa_dump_references (FILE *, struct ipa_ref_list *);
void ipa_dump_refering (FILE *, struct ipa_ref_list *);
void ipa_clone_references (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
void ipa_clone_refering (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);
bool ipa_ref_has_aliases_p (struct ipa_ref_list *);
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