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jeremybenn |
/* IPA reference lists.
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Copyright (C) 2010
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Free Software Foundation, Inc.
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Contributed by Jan Hubicka
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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struct cgraph_node;
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struct varpool_node;
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/* How the reference is done. */
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enum GTY(()) ipa_ref_use
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{
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IPA_REF_LOAD,
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IPA_REF_STORE,
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IPA_REF_ADDR,
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IPA_REF_ALIAS
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};
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/* Type of refering or refered type. */
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enum GTY(()) ipa_ref_type
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{
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IPA_REF_CGRAPH,
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IPA_REF_VARPOOL
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};
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/* We can have references spanning both callgraph and varpool,
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so all pointers needs to be of both types. */
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union GTY(()) ipa_ref_ptr_u
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{
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struct cgraph_node * GTY((tag ("IPA_REF_CGRAPH"))) cgraph_node;
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struct varpool_node * GTY((tag ("IPA_REF_VARPOOL"))) varpool_node;
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};
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/* Record of reference in callgraph or varpool. */
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struct GTY(()) ipa_ref
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{
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union ipa_ref_ptr_u GTY ((desc ("%1.refering_type"))) refering;
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union ipa_ref_ptr_u GTY ((desc ("%1.refered_type"))) refered;
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gimple stmt;
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unsigned int refered_index;
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ENUM_BITFIELD (ipa_ref_type) refering_type:1;
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ENUM_BITFIELD (ipa_ref_type) refered_type:1;
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ENUM_BITFIELD (ipa_ref_use) use:2;
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};
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typedef struct ipa_ref ipa_ref_t;
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typedef struct ipa_ref *ipa_ref_ptr;
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DEF_VEC_O(ipa_ref_t);
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DEF_VEC_ALLOC_O(ipa_ref_t,gc);
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DEF_VEC_P(ipa_ref_ptr);
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DEF_VEC_ALLOC_P(ipa_ref_ptr,heap);
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/* List of references. This is stored in both callgraph and varpool nodes. */
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struct GTY(()) ipa_ref_list
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{
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/* Store actual references in references vector. */
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VEC(ipa_ref_t,gc) *references;
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/* Refering is vector of pointers to references. It must not live in GGC space
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or GGC will try to mark middle of references vectors. */
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VEC(ipa_ref_ptr,heap) * GTY((skip)) refering;
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};
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struct ipa_ref * ipa_record_reference (struct cgraph_node *,
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struct varpool_node *,
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struct cgraph_node *,
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struct varpool_node *,
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enum ipa_ref_use, gimple);
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void ipa_remove_reference (struct ipa_ref *);
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void ipa_remove_all_references (struct ipa_ref_list *);
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void ipa_remove_all_refering (struct ipa_ref_list *);
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void ipa_dump_references (FILE *, struct ipa_ref_list *);
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void ipa_dump_refering (FILE *, struct ipa_ref_list *);
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void ipa_clone_references (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
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void ipa_clone_refering (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
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bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);
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bool ipa_ref_has_aliases_p (struct ipa_ref_list *);
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