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/* Callgraph handling code.
Copyright (C) 2003 Free Software Foundation, Inc.
Contributed by Jan Hubicka
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef GCC_CGRAPH_H
#define GCC_CGRAPH_H
/* Information about the function collected locally.
Available after function is lowered */
struct cgraph_local_info
{
/* Set when function function is visiable in current compilation unit only
and it's address is never taken. */
bool local;
/* Set when function is small enought to be inlinable many times. */
bool inline_many;
/* Set when function can be inlined once (false only for functions calling
alloca, using varargs and so on). */
bool can_inline_once;
};
/* Information about the function that needs to be computed globally
once compilation is finished. Available only with -funit-at-time. */
struct cgraph_global_info
{
/* Set when the function will be inlined exactly once. */
bool inline_once;
};
/* Information about the function that is propagated by the RTL backend.
Available only for functions that has been already assembled. */
struct cgraph_rtl_info
{
bool const_function, pure_function;
int preferred_incoming_stack_boundary;
};
/* The cgraph data strutcture.
Each function decl has assigned cgraph_node listing calees and callers. */
struct cgraph_node
{
tree decl;
struct cgraph_edge *callees;
struct cgraph_edge *callers;
struct cgraph_node *next, *previous;
/* For nested functions points to function the node is nested in. */
struct cgraph_node *origin;
/* Points to first nested function, if any. */
struct cgraph_node *nested;
/* Pointer to the next function with same origin, if any. */
struct cgraph_node *next_nested;
void *aux;
/* Set when function must be output - it is externally visible
or it's address is taken. */
bool needed;
/* Set when function is reachable by call from other function
that is eighter reachable or needed. */
bool reachable;
/* Set when the frontend has been asked to lower representation of this
function into trees. Callees lists are not available when lowered
is not set. */
bool lowered;
/* Set when function is scheduled to be assembled. */
bool output;
struct cgraph_local_info local;
struct cgraph_global_info global;
struct cgraph_rtl_info rtl;
};
struct cgraph_edge
{
struct cgraph_node *caller, *callee;
struct cgraph_edge *next_caller;
struct cgraph_edge *next_callee;
};
extern struct cgraph_node *cgraph_nodes;
extern int cgraph_n_nodes;
extern bool cgraph_global_info_ready;
/* In cgraph.c */
void dump_cgraph PARAMS ((FILE *));
void cgraph_remove_call PARAMS ((tree, tree));
void cgraph_remove_node PARAMS ((struct cgraph_node *));
struct cgraph_edge *cgraph_record_call PARAMS ((tree, tree));
struct cgraph_node *cgraph_node PARAMS ((tree decl));
bool cgraph_calls_p PARAMS ((tree, tree));
struct cgraph_local_info *cgraph_local_info PARAMS ((tree));
struct cgraph_global_info *cgraph_global_info PARAMS ((tree));
struct cgraph_rtl_info *cgraph_rtl_info PARAMS ((tree));
/* In cgraphunit.c */
void cgraph_finalize_function PARAMS ((tree, tree));
void cgraph_finalize_compilation_unit PARAMS ((void));
void cgraph_create_edges PARAMS ((tree, tree));
void cgraph_optimize PARAMS ((void));
void cgraph_mark_needed_node PARAMS ((struct cgraph_node *, int));
#endif /* GCC_CGRAPH_H */
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