gcc/ipa-ref.h

   1 /* IPA reference lists.
   2    Copyright (C) 2010
   3    Free Software Foundation, Inc.
   4    Contributed by Jan Hubicka
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 struct cgraph_node;
  23 struct varpool_node;
  24 union symtab_node_def;
  25 typedef union symtab_node_def *symtab_node;
  26 typedef const union symtab_node_def *const_symtab_node;
  27
  28
  29 /* How the reference is done.  */
  30 enum GTY(()) ipa_ref_use
  31 {
  32   IPA_REF_LOAD,
  33   IPA_REF_STORE,
  34   IPA_REF_ADDR,
  35   IPA_REF_ALIAS
  36 };
  37
  38 /* Record of reference in callgraph or varpool.  */
  39 struct GTY(()) ipa_ref
  40 {
  41   symtab_node referring;
  42   symtab_node referred;
  43   gimple stmt;
  44   unsigned int referred_index;
  45   ENUM_BITFIELD (ipa_ref_use) use:2;
  46 };
  47
  48 typedef struct ipa_ref ipa_ref_t;
  49 typedef struct ipa_ref *ipa_ref_ptr;
  50
  51
  52 /* List of references.  This is stored in both callgraph and varpool nodes.  */
  53 struct GTY(()) ipa_ref_list
  54 {
  55   /* Store actual references in references vector.  */
  56   vec<ipa_ref_t, va_gc> *references;
  57   /* Referring is vector of pointers to references.  It must not live in GGC space
  58      or GGC will try to mark middle of references vectors.  */
  59   vec<ipa_ref_ptr>  GTY((skip)) referring;
  60 };
  61
  62 struct ipa_ref * ipa_record_reference (symtab_node,
  63                                        symtab_node,
  64                                        enum ipa_ref_use, gimple);
  65
  66 void ipa_remove_reference (struct ipa_ref *);
  67 void ipa_remove_all_references (struct ipa_ref_list *);
  68 void ipa_remove_all_referring (struct ipa_ref_list *);
  69 void ipa_dump_references (FILE *, struct ipa_ref_list *);
  70 void ipa_dump_referring (FILE *, struct ipa_ref_list *);
  71 void ipa_clone_references (symtab_node, struct ipa_ref_list *);
  72 void ipa_clone_referring (symtab_node, struct ipa_ref_list *);
  73 bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);
  74 bool ipa_ref_has_aliases_p (struct ipa_ref_list *);