gcc/symtab-clones.h

   1 /* Representation of adjustment made to virtual clones in the symbol table.
   2    Copyright (C) 2003-2021 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 #ifndef GCC_SYMTAB_CLONES_H
  22 #define GCC_SYMTAB_CLONES_H
  23
  24 struct GTY(()) clone_info
  25 {
  26   /* Constructor.  */
  27   clone_info ()
  28     : tree_map (NULL),
  29       param_adjustments (NULL),
  30       performed_splits (NULL)
  31   {
  32   }
  33   /* Constants discovered by IPA-CP, i.e. which parameter should be replaced
  34      with what.  */
  35   vec<ipa_replace_map *, va_gc> *tree_map;
  36   /* Parameter modification that IPA-SRA decided to perform.  */
  37   ipa_param_adjustments *param_adjustments;
  38   /* Lists of dummy-decl and offset pairs representing split formal parameters
  39      in the caller.  Offsets of all new replacements are enumerated, those
  40      coming from the same original parameter have the same dummy decl stored
  41      along with them.
  42
  43      Dummy decls sit in call statement arguments followed by new parameter
  44      decls (or their SSA names) in between (caller) clone materialization and
  45      call redirection.  Redirection then recognizes the dummy variable and
  46      together with the stored offsets can reconstruct what exactly the new
  47      parameter decls represent and can leave in place only those that the
  48      callee expects.  */
  49   vec<ipa_param_performed_split, va_gc> *performed_splits;
  50
  51   /* Return clone_info, if available.  */
  52   static clone_info *get (cgraph_node *node);
  53
  54   /* Return clone_info possibly creating new one.  */
  55   static clone_info *get_create (cgraph_node *node);
  56
  57   /* Remove clone_info.  */
  58   static void remove (cgraph_node *node);
  59
  60   /* Release all clone_infos.  */
  61   static void release (void);
  62 };
  63
  64 /* Return clone_info, if available.  */
  65 inline clone_info *
  66 clone_info::get (cgraph_node *node)
  67 {
  68   if (!symtab->m_clones)
  69     return NULL;
  70   return symtab->m_clones->get (node);
  71 }
  72
  73
  74 /* Remove clone_info association for NODE.  */
  75 inline void
  76 clone_info::remove (cgraph_node *node)
  77 {
  78   symtab->m_clones->remove (node);
  79 }
  80
  81 /* Free clone info summaries.  */
  82 inline void
  83 clone_info::release ()
  84 {
  85   if (symtab->m_clones)
  86     ggc_delete (symtab->m_clones);
  87   symtab->m_clones = NULL;
  88 }
  89
  90 #endif  /* GCC_SYMTAB_CLONES_H  */