gcc/symtab-clones.cc

   1 /* Support for virtual clones in symbol table.
   2    Copyright (C) 2003-2022 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 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "backend.h"
  25 #include "tree.h"
  26 #include "gimple.h"
  27 #include "predict.h"
  28 #include "target.h"
  29 #include "rtl.h"
  30 #include "alloc-pool.h"
  31 #include "cgraph.h"
  32 #include "symbol-summary.h"
  33 #include "symtab-clones.h"
  34 #include "lto-streamer.h"
  35 #include "data-streamer.h"
  36
  37 namespace {
  38
  39 /* Function summary for clone_infos.  */
  40 class GTY((user)) clone_infos_t: public function_summary <clone_info *>
  41 {
  42 public:
  43   clone_infos_t (symbol_table *table, bool ggc):
  44     function_summary<clone_info *> (table, ggc) { }
  45 };
  46
  47 }  /* anon namespace  */
  48
  49 /* Return thunk_info possibly creating new one.  */
  50 clone_info *
  51 clone_info::get_create (cgraph_node *node)
  52 {
  53   if (!symtab->m_clones)
  54     {
  55       symtab->m_clones
  56          = new (ggc_alloc_no_dtor <function_summary <clone_info *>> ())
  57              function_summary <clone_info *> (symtab, true);
  58       symtab->m_clones->disable_insertion_hook ();
  59       symtab->m_clones->disable_duplication_hook ();
  60     }
  61   return symtab->m_clones->get_create (node);
  62 }