/* Callgraph handling code.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Jan Hubicka
This file is part of GCC.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#ifndef GCC_CGRAPH_H
#define GCC_CGRAPH_H
-#include "hashtab.h"
-#include "bitmap.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. */
int self_insns;
/* Set when function function is visible in current compilation unit only
- and it's address is never taken. */
+ and its address is never taken. */
bool local;
- /* Set when function is defined in another compilation unit. */
- bool external;
-
- /* Set when this function calls a function external of the
- compilation unit. In general, such calls are modeled as reading
- and writing all variables (both bits on) but sometime there are
- attributes on the called function so we can do better. */
- bool calls_read_all;
- bool calls_write_all;
+ /* Set when function is visible by other units. */
+ bool externally_visible;
/* 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. */
+ /* 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
/* True if statics_read_for_function and
statics_written_for_function contain valid data. */
bool for_functions_valid;
+
+ /* True if the function is going to be emitted in some other translation
+ unit, referenced from vtable. */
+ bool vtable_method;
};
/* Information about the function that needs to be computed globally
/* 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;
};
struct cgraph_rtl_info GTY(())
{
int preferred_incoming_stack_boundary;
- bool const_function;
- bool pure_function;
};
-/* FIXME -- PROFILE-RESTRUCTURE: When the next round of the profiling
- code gets merged in, it will contain a restructing where ssa form
- is built for every function within the compilation unit before the
- rest of the compilation continues. When this reorgination is done,
- it will no longer be necessary to have the _decl_uid versions of
- local_static_vars_info and global_static_vars_info structures.
- Having both structures is now requirred because the _ann_uid values
- for static variables are reset as each function is compiled.
- Currently, the analysis is done using the _decl_uid versions and
- converted to the _var_ann versions on demand.
-
- Also, the var_anns_valid fields within these structures can also go
- away.
-*/
-
-/* The static variables defined within the compilation unit that are
- loaded or stored directly by function that owns this structure. */
-
-struct local_static_vars_info_d GTY(())
-{
- bitmap statics_read_by_decl_uid;
- bitmap statics_written_by_decl_uid;
-};
-
-struct global_static_vars_info_d GTY(())
-{
- bitmap statics_read_by_decl_uid;
- bitmap statics_written_by_decl_uid;
- bitmap statics_read_by_ann_uid;
- bitmap statics_written_by_ann_uid;
- bitmap statics_not_read_by_decl_uid;
- bitmap statics_not_written_by_decl_uid;
- bitmap statics_not_read_by_ann_uid;
- bitmap statics_not_written_by_ann_uid;
-
- /* var_anns_valid is reset at the start of compilation for each
- function because the indexing that the "_var_anns" is based
- on is invalidated between function compilations. This allows for
- lazy creation of the "_var_ann" variables. */
- bool var_anns_valid;
-};
-
-/* Statics that are read and written by some set of functions. The
- local ones are based on the loads and stores local to the function.
- The global ones are based on the local info as well as the
- transitive closure of the functions that are called. The
- structures are separated to allow the global structures to be
- shared between several functions since every function within a
- strongly connected component will have the same information. This
- sharing saves both time and space in the computation of the vectors
- as well as their translation from decl_uid form to ann_uid
- form. */
-
-typedef struct local_static_vars_info_d *local_static_vars_info_t;
-typedef struct global_static_vars_info_d *global_static_vars_info_t;
-
-struct static_vars_info_d GTY(())
-{
- local_static_vars_info_t local;
- global_static_vars_info_t global;
-};
-
-typedef struct static_vars_info_d *static_vars_info_t;
-
/* The cgraph data structure.
Each function decl has assigned cgraph_node listing callees and callers. */
struct cgraph_node *next_needed;
/* Pointer to the next clone. */
struct cgraph_node *next_clone;
- /* Pointer to next node in a recursive call graph cycle; */
- struct cgraph_node *next_cycle;
+ 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;
+
PTR GTY ((skip)) aux;
struct cgraph_local_info local;
struct cgraph_global_info global;
struct cgraph_rtl_info rtl;
- /* Pointer to the structure that contains the sets of global
- variables modified by function calls. */
- static_vars_info_t static_vars_info;
-
+ /* Expected number of executions: calculated in profile.c. */
+ gcov_type count;
/* Unique id of the node. */
int uid;
/* Set when function must be output - it is externally visible
- or it's address is taken. */
+ 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 is lowered (ie it's CFG is built). */
+ bool lowered;
/* 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 when function is visible by other units. */
+ bool externally_visible;
+ /* Set for aliases once they got through assemble_alias. */
+ bool alias;
};
-struct cgraph_edge GTY((chain_next ("%h.next_caller")))
+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;
+ 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;
};
/* The cgraph_varpool data structure.
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 it's address is taken. */
+ or its address is taken. */
bool needed;
+ /* Needed variables might become dead by optimization. This flag
+ forces the variable to be output even if it appears dead otherwise. */
+ bool force_output;
+ /* Set once the variable has been instantiated and its callee
+ lists created. */
+ bool analyzed;
/* Set once it has been finalized so we consider it to be output. */
bool finalized;
- /* Set when function is scheduled to be assembled. */
+ /* Set when variable is scheduled to be assembled. */
bool output;
+ /* Set when function is visible by other units. */
+ bool externally_visible;
+ /* 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 bool cgraph_function_flags_ready;
extern GTY(()) struct cgraph_node *cgraph_nodes_queue;
-extern GTY(()) int cgraph_varpool_n_nodes;
+extern GTY(()) struct cgraph_varpool_node *cgraph_varpool_first_unanalyzed_node;
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 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);
-struct cgraph_node *cgraph_node (tree decl);
-struct cgraph_edge *cgraph_edge (struct cgraph_node *, tree call_expr);
-bool cgraph_calls_p (tree, tree);
+ 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);
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_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);
-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 *);
+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 *);
/* In cgraphunit.c */
bool cgraph_assemble_pending_functions (void);
+bool cgraph_varpool_assemble_pending_decls (void);
void cgraph_finalize_function (tree, bool);
+void cgraph_lower_function (struct cgraph_node *);
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_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);
-bitmap get_global_statics_not_read (tree fn);
-bitmap get_global_statics_not_written(tree fn);
void init_cgraph (void);
-
+struct cgraph_node *cgraph_function_versioning (struct cgraph_node *,
+ varray_type, varray_type);
+
+/* 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 */
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