335 lines
12 KiB
C
335 lines
12 KiB
C
/* 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, 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#ifndef GCC_CGRAPH_H
|
|
#define GCC_CGRAPH_H
|
|
#include "tree.h"
|
|
#include "basic-block.h"
|
|
|
|
enum availability
|
|
{
|
|
/* Not yet set by cgraph_function_body_availability. */
|
|
AVAIL_UNSET,
|
|
/* Function body/variable initializer is unknown. */
|
|
AVAIL_NOT_AVAILABLE,
|
|
/* Function body/variable initializer is known but might be replaced
|
|
by a different one from other compilation unit and thus needs to
|
|
be dealt with a care. Like AVAIL_NOT_AVAILABLE it can have
|
|
arbitrary side effects on escaping variables and functions, while
|
|
like AVAILABLE it might access static variables. */
|
|
AVAIL_OVERWRITABLE,
|
|
/* Function body/variable initializer is known and will be used in final
|
|
program. */
|
|
AVAIL_AVAILABLE,
|
|
/* Function body/variable initializer is known and all it's uses are explicitly
|
|
visible within current unit (ie it's address is never taken and it is not
|
|
exported to other units).
|
|
Currently used only for functions. */
|
|
AVAIL_LOCAL
|
|
};
|
|
|
|
/* 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. */
|
|
unsigned local : 1;
|
|
|
|
/* Set when function is visible by other units. */
|
|
unsigned externally_visible : 1;
|
|
|
|
/* Set once it has been finalized so we consider it to be output. */
|
|
unsigned finalized : 1;
|
|
|
|
/* False when there something makes inlining impossible (such as va_arg). */
|
|
unsigned inlinable : 1;
|
|
|
|
/* True when function should be inlined independently on its size. */
|
|
unsigned disregard_inline_limits : 1;
|
|
|
|
/* True when the function has been originally extern inline, but it is
|
|
redefined now. */
|
|
unsigned redefined_extern_inline : 1;
|
|
|
|
/* True if statics_read_for_function and
|
|
statics_written_for_function contain valid data. */
|
|
unsigned for_functions_valid : 1;
|
|
|
|
/* True if the function is going to be emitted in some other translation
|
|
unit, referenced from vtable. */
|
|
unsigned vtable_method : 1;
|
|
};
|
|
|
|
/* 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;
|
|
|
|
/* Estimated growth after inlining. INT_MIN if not computed. */
|
|
int estimated_growth;
|
|
|
|
/* 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;
|
|
};
|
|
|
|
/* 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;
|
|
struct cgraph_node *prev_clone;
|
|
/* Pointer to a single unique cgraph node for this function. If the
|
|
function is to be output, this is the copy that will survive. */
|
|
struct cgraph_node *master_clone;
|
|
/* For functions with many calls sites it holds map from call expression
|
|
to the edge to speed up cgraph_edge function. */
|
|
htab_t GTY((param_is (struct cgraph_edge))) call_site_hash;
|
|
|
|
PTR GTY ((skip)) aux;
|
|
|
|
struct cgraph_local_info local;
|
|
struct cgraph_global_info global;
|
|
struct cgraph_rtl_info rtl;
|
|
|
|
/* Expected number of executions: calculated in profile.c. */
|
|
gcov_type count;
|
|
/* Unique id of the node. */
|
|
int uid;
|
|
/* Ordering of all cgraph nodes. */
|
|
int order;
|
|
|
|
/* Set when function must be output - it is externally visible
|
|
or its address is taken. */
|
|
unsigned needed : 1;
|
|
/* Set when function is reachable by call from other function
|
|
that is either reachable or needed. */
|
|
unsigned reachable : 1;
|
|
/* Set once the function is lowered (i.e. its CFG is built). */
|
|
unsigned lowered : 1;
|
|
/* Set once the function has been instantiated and its callee
|
|
lists created. */
|
|
unsigned analyzed : 1;
|
|
/* Set when function is scheduled to be assembled. */
|
|
unsigned output : 1;
|
|
/* Set for aliases once they got through assemble_alias. */
|
|
unsigned alias : 1;
|
|
|
|
/* In non-unit-at-a-time mode the function body of inline candidates is saved
|
|
into clone before compiling so the function in original form can be
|
|
inlined later. This pointer points to the clone. */
|
|
tree inline_decl;
|
|
};
|
|
|
|
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_stmt;
|
|
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;
|
|
/* Expected number of executions: calculated in profile.c. */
|
|
gcov_type count;
|
|
/* Depth of loop nest, 1 means no loop nest. */
|
|
int loop_nest;
|
|
};
|
|
|
|
typedef struct cgraph_edge *cgraph_edge_p;
|
|
|
|
DEF_VEC_P(cgraph_edge_p);
|
|
DEF_VEC_ALLOC_P(cgraph_edge_p,heap);
|
|
|
|
/* 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;
|
|
/* Ordering of all cgraph nodes. */
|
|
int order;
|
|
|
|
/* Set when function must be output - it is externally visible
|
|
or its address is taken. */
|
|
unsigned needed : 1;
|
|
/* Needed variables might become dead by optimization. This flag
|
|
forces the variable to be output even if it appears dead otherwise. */
|
|
unsigned force_output : 1;
|
|
/* Set once the variable has been instantiated and its callee
|
|
lists created. */
|
|
unsigned analyzed : 1;
|
|
/* Set once it has been finalized so we consider it to be output. */
|
|
unsigned finalized : 1;
|
|
/* Set when variable is scheduled to be assembled. */
|
|
unsigned output : 1;
|
|
/* Set when function is visible by other units. */
|
|
unsigned externally_visible : 1;
|
|
/* Set for aliases once they got through assemble_alias. */
|
|
unsigned alias : 1;
|
|
};
|
|
|
|
/* Every top level asm statement is put into a cgraph_asm_node. */
|
|
|
|
struct cgraph_asm_node GTY(())
|
|
{
|
|
/* Next asm node. */
|
|
struct cgraph_asm_node *next;
|
|
/* String for this asm node. */
|
|
tree asm_str;
|
|
/* Ordering of all cgraph nodes. */
|
|
int order;
|
|
};
|
|
|
|
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 bool cgraph_function_flags_ready;
|
|
extern GTY(()) struct cgraph_node *cgraph_nodes_queue;
|
|
extern GTY(()) struct cgraph_node *cgraph_expand_queue;
|
|
|
|
extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_first_unanalyzed_node;
|
|
extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_last_needed_node;
|
|
extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
|
|
extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes;
|
|
extern GTY(()) struct cgraph_asm_node *cgraph_asm_nodes;
|
|
extern GTY(()) int cgraph_order;
|
|
|
|
/* In cgraph.c */
|
|
void dump_cgraph (FILE *);
|
|
void dump_cgraph_node (FILE *, struct cgraph_node *);
|
|
void cgraph_insert_node_to_hashtable (struct cgraph_node *node);
|
|
void dump_varpool (FILE *);
|
|
void dump_cgraph_varpool_node (FILE *, struct cgraph_varpool_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, gcov_type, int);
|
|
struct cgraph_node *cgraph_node (tree);
|
|
struct cgraph_node *cgraph_node_for_asm (tree asmname);
|
|
struct cgraph_edge *cgraph_edge (struct cgraph_node *, tree);
|
|
void cgraph_set_call_stmt (struct cgraph_edge *, 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_edge * cgraph_clone_edge (struct cgraph_edge *,
|
|
struct cgraph_node *,
|
|
tree, gcov_type, int, bool);
|
|
struct cgraph_node * cgraph_clone_node (struct cgraph_node *, gcov_type,
|
|
int, bool);
|
|
|
|
struct cgraph_varpool_node *cgraph_varpool_node (tree);
|
|
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);
|
|
void cgraph_redirect_edge_callee (struct cgraph_edge *, struct cgraph_node *);
|
|
|
|
struct cgraph_asm_node *cgraph_add_asm_node (tree);
|
|
|
|
bool cgraph_function_possibly_inlined_p (tree);
|
|
void cgraph_unnest_node (struct cgraph_node *);
|
|
void cgraph_varpool_enqueue_needed_node (struct cgraph_varpool_node *);
|
|
void cgraph_varpool_reset_queue (void);
|
|
bool decide_is_variable_needed (struct cgraph_varpool_node *, tree);
|
|
|
|
enum availability cgraph_function_body_availability (struct cgraph_node *);
|
|
enum availability cgraph_variable_initializer_availability (struct cgraph_varpool_node *);
|
|
bool cgraph_is_master_clone (struct cgraph_node *);
|
|
struct cgraph_node *cgraph_master_clone (struct cgraph_node *);
|
|
void cgraph_add_new_function (tree);
|
|
|
|
/* In cgraphunit.c */
|
|
bool cgraph_assemble_pending_functions (void);
|
|
bool cgraph_varpool_assemble_pending_decls (void);
|
|
void cgraph_finalize_function (tree, bool);
|
|
void cgraph_finalize_compilation_unit (void);
|
|
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_build_static_cdtor (char which, tree body, int priority);
|
|
void cgraph_reset_static_var_maps (void);
|
|
void init_cgraph (void);
|
|
struct cgraph_node *cgraph_function_versioning (struct cgraph_node *,
|
|
VEC(cgraph_edge_p,heap)*,
|
|
varray_type);
|
|
void cgraph_analyze_function (struct cgraph_node *);
|
|
struct cgraph_node *save_inline_function_body (struct cgraph_node *);
|
|
|
|
/* In ipa.c */
|
|
bool cgraph_remove_unreachable_nodes (bool, FILE *);
|
|
int cgraph_postorder (struct cgraph_node **);
|
|
|
|
/* In ipa-inline.c */
|
|
bool cgraph_decide_inlining_incrementally (struct cgraph_node *, bool);
|
|
void cgraph_clone_inlined_nodes (struct cgraph_edge *, bool, bool);
|
|
void cgraph_mark_inline_edge (struct cgraph_edge *, bool);
|
|
bool cgraph_default_inline_p (struct cgraph_node *, const char **);
|
|
#endif /* GCC_CGRAPH_H */
|