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/* Callgraph handling code.
Copyright (C) 2003, 2004 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 analyzed. */
struct cgraph_local_info GTY(())
{
/* Size of the function before inlining. */
int self_insns;
/* Set when function function is visible in current compilation unit only
and it's address is never taken. */
bool local;
/* Set once it has been finalized so we consider it to be output. */
bool finalized;
/* False when there something makes inlining impossible (such as va_arg). */
bool inlinable;
/* True when function should be inlined independently on it's size. */
bool disregard_inline_limits;
/* True when the function has been originally extern inline, but it is
redefined now. */
bool redefined_extern_inline;
};
/* Information about the function that needs to be computed globally
once compilation is finished. Available only with -funit-at-time. */
struct cgraph_global_info GTY(())
{
/* Estimated size of the function after inlining. */
int insns;
/* Number of times given function will be cloned during output. */
int cloned_times;
/* Set when the function will be inlined exactly once. */
bool inline_once;
/* Set to true for all reachable functions before inlining is decided.
Once we inline all calls to the function and the function is local,
it is set to false. */
bool will_be_output;
/* Set iff at least one of the caller edges has inline_call flag set. */
bool inlined;
};
/* Information about the function that is propagated by the RTL backend.
Available only for functions that has been already assembled. */
struct cgraph_rtl_info GTY(())
{
bool const_function;
bool pure_function;
int preferred_incoming_stack_boundary;
};
/* The cgraph data structure.
Each function decl has assigned cgraph_node listing callees and callers. */
struct cgraph_node GTY((chain_next ("%h.next"), chain_prev ("%h.previous")))
{
tree decl;
struct cgraph_edge *callees;
struct cgraph_edge *callers;
struct cgraph_node *next;
struct cgraph_node *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;
/* Pointer to the next function in cgraph_nodes_queue. */
struct cgraph_node *next_needed;
PTR GTY ((skip (""))) aux;
struct cgraph_local_info local;
struct cgraph_global_info global;
struct cgraph_rtl_info rtl;
/* Unique id of the node. */
int uid;
/* 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 either reachable or needed. */
bool reachable;
/* Set once the function has been instantiated and its callee
lists created. */
bool analyzed;
/* Set when function is scheduled to be assembled. */
bool output;
};
struct cgraph_edge GTY(())
{
struct cgraph_node *caller;
struct cgraph_node *callee;
struct cgraph_edge *next_caller;
struct cgraph_edge *next_callee;
/* When NULL, inline this call. When non-NULL, points to the explanation
why function was not inlined. */
const char *inline_failed;
};
/* The cgraph_varpool data structure.
Each static variable decl has assigned cgraph_varpool_node. */
struct cgraph_varpool_node GTY(())
{
tree decl;
/* Pointer to the next function in cgraph_varpool_nodes_queue. */
struct cgraph_varpool_node *next_needed;
/* Set when function must be output - it is externally visible
or it's address is taken. */
bool needed;
/* Set once it has been finalized so we consider it to be output. */
bool finalized;
/* Set when function is scheduled to be assembled. */
bool output;
};
extern GTY(()) struct cgraph_node *cgraph_nodes;
extern GTY(()) int cgraph_n_nodes;
extern GTY(()) int cgraph_max_uid;
extern bool cgraph_global_info_ready;
extern GTY(()) struct cgraph_node *cgraph_nodes_queue;
extern FILE *cgraph_dump_file;
extern GTY(()) int cgraph_varpool_n_nodes;
extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
/* In cgraph.c */
void dump_cgraph (FILE *);
void cgraph_remove_edge (struct cgraph_node *, struct cgraph_node *);
void cgraph_remove_call (tree, tree);
void cgraph_remove_node (struct cgraph_node *);
struct cgraph_edge *cgraph_record_call (tree, tree);
struct cgraph_node *cgraph_node (tree decl);
struct cgraph_node *cgraph_node_for_identifier (tree id);
bool cgraph_calls_p (tree, tree);
struct cgraph_local_info *cgraph_local_info (tree);
struct cgraph_global_info *cgraph_global_info (tree);
struct cgraph_rtl_info *cgraph_rtl_info (tree);
const char * cgraph_node_name (struct cgraph_node *);
struct cgraph_varpool_node *cgraph_varpool_node (tree decl);
struct cgraph_varpool_node *cgraph_varpool_node_for_identifier (tree id);
void cgraph_varpool_mark_needed_node (struct cgraph_varpool_node *);
void cgraph_varpool_finalize_decl (tree);
bool cgraph_varpool_assemble_pending_decls (void);
bool cgraph_function_possibly_inlined_p (tree);
/* In cgraphunit.c */
bool cgraph_assemble_pending_functions (void);
void cgraph_finalize_function (tree, bool);
void cgraph_finalize_compilation_unit (void);
void cgraph_create_edges (tree, tree);
void cgraph_optimize (void);
void cgraph_mark_needed_node (struct cgraph_node *);
void cgraph_mark_reachable_node (struct cgraph_node *);
bool cgraph_inline_p (tree, tree, const char **reason);
#endif /* GCC_CGRAPH_H */
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