gcc/cgraph.h

   1 /* Callgraph handling code.
   2    Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #ifndef GCC_CGRAPH_H
  23 #define GCC_CGRAPH_H
  24
  25 /* The cgraph data strutcture.
  26    Each function decl has assigned cgraph_node listing calees and callers.  */
  27
  28 struct cgraph_node
  29 {
  30   tree decl;
  31   struct cgraph_edge *callees;
  32   struct cgraph_edge *callers;
  33   struct cgraph_node *next;
  34   /* For nested functions points to function the node is nested in.  */
  35   struct cgraph_node *origin;
  36   /* Points to first nested function, if any.  */
  37   struct cgraph_node *nested;
  38   /* Pointer to the next function with same origin, if any.  */
  39   struct cgraph_node *next_nested;
  40   void *aux;
  41
  42   /* Set when function must be output - it is externally visible
  43      or it's address is taken.  */
  44   bool needed;
  45   /* Set when function is reachable by call from other function
  46      that is eighter reachable or needed.  */
  47   bool reachable;
  48   /* Set when the frontend has been asked to lower representation of this
  49      function into trees.  Callees lists are not available when lowered
  50      is not set.  */
  51   bool lowered;
  52   /* Set when function is scheduled to be assembled.  */
  53   bool output;
  54 };
  55
  56 struct cgraph_edge
  57 {
  58   struct cgraph_node *caller, *callee;
  59   struct cgraph_edge *next_caller;
  60   struct cgraph_edge *next_callee;
  61 };
  62
  63 extern struct cgraph_node *cgraph_nodes;
  64 extern int cgraph_n_nodes;
  65
  66 /* In cgraph.c  */
  67 void dump_cgraph                        PARAMS ((FILE *));
  68 void cgraph_remove_call                 PARAMS ((tree, tree));
  69 struct cgraph_edge *cgraph_record_call  PARAMS ((tree, tree));
  70 struct cgraph_node *cgraph_node         PARAMS ((tree decl));
  71 bool cgraph_calls_p                     PARAMS ((tree, tree));
  72
  73 /* In cgraphunit.c  */
  74 void cgraph_finalize_function           PARAMS ((tree, tree));
  75 void cgraph_finalize_compilation_unit   PARAMS ((void));
  76 void cgraph_create_edges                PARAMS ((tree, tree));
  77 void cgraph_optimize                    PARAMS ((void));
  78 void cgraph_mark_needed_node            PARAMS ((struct cgraph_node *, int));
  79
  80 #endif  /* GCC_CGRAPH_H  */