gcc/ipa-ref.h

   1 /* IPA reference lists.
   2    Copyright (C) 2010-2013 Free Software Foundation, Inc.
   3    Contributed by Jan Hubicka
   4
   5 This file is part of GCC.
   6
   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.
  11
  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.
  16
  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/>.  */
  20
  21 struct cgraph_node;
  22 struct varpool_node;
  23 union symtab_node_def;
  24 typedef union symtab_node_def *symtab_node;
  25 typedef const union symtab_node_def *const_symtab_node;
  26
  27
  28 /* How the reference is done.  */
  29 enum GTY(()) ipa_ref_use
  30 {
  31   IPA_REF_LOAD,
  32   IPA_REF_STORE,
  33   IPA_REF_ADDR,
  34   IPA_REF_ALIAS
  35 };
  36
  37 /* Record of reference in callgraph or varpool.  */
  38 struct GTY(()) ipa_ref
  39 {
  40   symtab_node referring;
  41   symtab_node referred;
  42   gimple stmt;
  43   unsigned int referred_index;
  44   ENUM_BITFIELD (ipa_ref_use) use:2;
  45 };
  46
  47 typedef struct ipa_ref ipa_ref_t;
  48 typedef struct ipa_ref *ipa_ref_ptr;
  49
  50
  51 /* List of references.  This is stored in both callgraph and varpool nodes.  */
  52 struct GTY(()) ipa_ref_list
  53 {
  54   /* Store actual references in references vector.  */
  55   vec<ipa_ref_t, va_gc> *references;
  56   /* Referring is vector of pointers to references.  It must not live in GGC space
  57      or GGC will try to mark middle of references vectors.  */
  58   vec<ipa_ref_ptr>  GTY((skip)) referring;
  59 };
  60
  61 struct ipa_ref * ipa_record_reference (symtab_node,
  62                                        symtab_node,
  63                                        enum ipa_ref_use, gimple);
  64
  65 void ipa_remove_reference (struct ipa_ref *);
  66 void ipa_remove_all_references (struct ipa_ref_list *);
  67 void ipa_remove_all_referring (struct ipa_ref_list *);
  68 void ipa_dump_references (FILE *, struct ipa_ref_list *);
  69 void ipa_dump_referring (FILE *, struct ipa_ref_list *);
  70 void ipa_clone_references (symtab_node, struct ipa_ref_list *);
  71 void ipa_clone_referring (symtab_node, struct ipa_ref_list *);
  72 bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);
  73 bool ipa_ref_has_aliases_p (struct ipa_ref_list *);
  74 struct ipa_ref * ipa_find_reference (symtab_node, symtab_node, gimple);