gcc/tree-nested.h

   1 /* Header file for Nested function decomposition for GIMPLE.
   2    Copyright (C) 2013-2021 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_TREE_NESTED_H
  21 #define GCC_TREE_NESTED_H
  22
  23 extern tree build_addr (tree);
  24 extern void insert_field_into_struct (tree, tree);
  25 extern void lower_nested_functions (tree);
  26
  27 class nested_function_info
  28 {
  29 public:
  30   /* Constructor.  */
  31   nested_function_info ()
  32     : origin (NULL),
  33       nested (NULL),
  34       next_nested (NULL)
  35   {
  36   }
  37   /* Copy constructor.  We can not simply copy the structure,
  38      because the linked lists would go wrong.  However we should never
  39      need that.  */
  40   nested_function_info (const nested_function_info &)
  41   {
  42      gcc_unreachable ();
  43   }
  44   ~nested_function_info ();
  45
  46   /* Return nested_function_info, if available.  */
  47   static nested_function_info *get (cgraph_node *node);
  48
  49   /* Return nested_function_info possibly creating new one.  */
  50   static nested_function_info *get_create (cgraph_node *node);
  51
  52   /* Release all nested_function_infos.  */
  53   static void release (void);
  54
  55   /* For nested functions points to function the node is nested in.  */
  56   cgraph_node *origin;
  57   /* Points to first nested function, if any.  */
  58   cgraph_node *nested;
  59   /* Pointer to the next function with same origin, if any.  */
  60   cgraph_node *next_nested;
  61 };
  62
  63 extern void maybe_record_nested_function (cgraph_node *node);
  64 extern void unnest_function (cgraph_node *node);
  65
  66 /* If there are functions nested in NODE, return first one.  */
  67 inline cgraph_node *
  68 first_nested_function (cgraph_node *node)
  69 {
  70   nested_function_info *info = nested_function_info::get (node);
  71   return info ? info->nested : NULL;
  72 }
  73
  74 /* Return next nested function (used to iterate from first_nested_function).  */
  75 inline cgraph_node *
  76 next_nested_function (cgraph_node *node)
  77 {
  78   return nested_function_info::get (node)->next_nested;
  79 }
  80
  81 /* Return origin of nested function (and NULL otherwise).  */
  82 inline cgraph_node *
  83 nested_function_origin (cgraph_node *node)
  84 {
  85   nested_function_info *info = nested_function_info::get (node);
  86   return info ? info->origin : NULL;
  87 }
  88
  89 #endif /* GCC_TREE_NESTED_H */