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/* Callgraph handling code.
Copyright (C) 2003, 2004, 2005 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
#include "tree.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 its 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 its size. */
bool disregard_inline_limits;
/* True when the function has been originally extern inline, but it is
redefined now. */
bool redefined_extern_inline;
/* True if statics_read_for_function and
statics_written_for_function contain valid data. */
bool for_functions_valid;
};
/* 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(())
{
/* For inline clones this points to the function they will be inlined into. */
struct cgraph_node *inlined_to;
/* Estimated size of the function after inlining. */
int insns;
/* Set iff the function has been inlined at least once. */
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(())
{
int preferred_incoming_stack_boundary;
bool const_function;
bool pure_function;
};
/* 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;
/* Pointer to the next clone. */
struct cgraph_node *next_clone;
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 its 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;
/* Set for aliases once they got through assemble_alias. */
bool alias;
};
struct cgraph_edge GTY((chain_next ("%h.next_caller"), chain_prev ("%h.prev_caller")))
{
struct cgraph_node *caller;
struct cgraph_node *callee;
struct cgraph_edge *prev_caller;
struct cgraph_edge *next_caller;
struct cgraph_edge *prev_callee;
struct cgraph_edge *next_callee;
tree call_expr;
PTR GTY ((skip (""))) aux;
/* 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. */
struct cgraph_varpool_node *next;
/* 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 its 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;
/* Set for aliases once they got through assemble_alias. */
bool alias;
};
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 GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
/* In cgraph.c */
void dump_cgraph (FILE *);
void dump_cgraph_node (FILE *, struct cgraph_node *);
void cgraph_remove_edge (struct cgraph_edge *);
void cgraph_remove_node (struct cgraph_node *);
void cgraph_node_remove_callees (struct cgraph_node *node);
struct cgraph_edge *cgraph_create_edge (struct cgraph_node *,
struct cgraph_node *,
tree);
struct cgraph_node *cgraph_node (tree decl);
struct cgraph_node *cgraph_node_for_asm (tree asmname);
struct cgraph_edge *cgraph_edge (struct cgraph_node *, tree call_expr);
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_edge * cgraph_clone_edge (struct cgraph_edge *, struct cgraph_node *, tree);
struct cgraph_node * cgraph_clone_node (struct cgraph_node *);
struct cgraph_varpool_node *cgraph_varpool_node (tree decl);
struct cgraph_varpool_node *cgraph_varpool_node_for_asm (tree asmname);
void cgraph_varpool_mark_needed_node (struct cgraph_varpool_node *);
void cgraph_varpool_finalize_decl (tree);
bool cgraph_varpool_assemble_pending_decls (void);
void cgraph_redirect_edge_callee (struct cgraph_edge *, struct cgraph_node *);
bool cgraph_function_possibly_inlined_p (tree);
void cgraph_unnest_node (struct cgraph_node *node);
/* 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 (struct cgraph_node *, 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 (struct cgraph_edge *, const char **reason);
bool cgraph_preserve_function_body_p (tree);
void verify_cgraph (void);
void verify_cgraph_node (struct cgraph_node *);
void cgraph_mark_inline_edge (struct cgraph_edge *e);
void cgraph_clone_inlined_nodes (struct cgraph_edge *e, bool duplicate);
void cgraph_build_static_cdtor (char which, tree body, int priority);
void cgraph_reset_static_var_maps (void);
void init_cgraph (void);
#endif /* GCC_CGRAPH_H */
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