/* Data and Control Flow Analysis for Trees.
- Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@redhat.com>
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)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#ifndef _TREE_FLOW_H
#define _TREE_FLOW_H 1
struct basic_block_def;
typedef struct basic_block_def *basic_block;
#endif
+struct static_var_ann_d;
-/* True if the code is in ssa form. */
-extern bool in_ssa_p;
+/* The reasons a variable may escape a function. */
+enum escape_type
+{
+ NO_ESCAPE = 0, /* Doesn't escape. */
+ ESCAPE_STORED_IN_GLOBAL = 1 << 0,
+ ESCAPE_TO_ASM = 1 << 1, /* Passed by address to an assembly
+ statement. */
+ ESCAPE_TO_CALL = 1 << 2, /* Escapes to a function call. */
+ ESCAPE_BAD_CAST = 1 << 3, /* Cast from pointer to integer */
+ ESCAPE_TO_RETURN = 1 << 4, /* Returned from function. */
+ ESCAPE_TO_PURE_CONST = 1 << 5, /* Escapes to a pure or constant
+ function call. */
+ ESCAPE_IS_GLOBAL = 1 << 6, /* Is a global variable. */
+ ESCAPE_IS_PARM = 1 << 7, /* Is an incoming function argument. */
+ ESCAPE_UNKNOWN = 1 << 8 /* We believe it escapes for
+ some reason not enumerated
+ above. */
+};
+
+/* Memory reference statistics for individual memory symbols,
+ collected during alias analysis. */
+struct mem_sym_stats_d GTY(())
+{
+ /* Memory symbol. */
+ tree var;
+
+ /* Nonzero if this entry has been assigned a partition. */
+ unsigned int partitioned_p : 1;
+
+ /* Nonzero if VAR is a memory partition tag that already contains
+ call-clobbered variables in its partition set. */
+ unsigned int has_call_clobbered_vars : 1;
+
+ /* Number of direct reference sites. A direct reference to VAR is any
+ reference of the form 'VAR = ' or ' = VAR'. For GIMPLE reg
+ pointers, this is the number of sites where the pointer is
+ dereferenced. */
+ long num_direct_writes;
+ long num_direct_reads;
+
+ /* Number of indirect reference sites. An indirect reference to VAR
+ is any reference via a pointer that contains VAR in its points-to
+ set or, in the case of call-clobbered symbols, a function call. */
+ long num_indirect_writes;
+ long num_indirect_reads;
+
+ /* Execution frequency. This is the sum of the execution
+ frequencies of all the statements that reference this object
+ weighted by the number of references in each statement. This is
+ the main key used to sort the list of symbols to partition.
+ Symbols with high execution frequencies are put at the bottom of
+ the work list (ie, they are partitioned last).
+ Execution frequencies are taken directly from each basic block,
+ so compiling with PGO enabled will increase the precision of this
+ estimate. */
+ long frequency_reads;
+ long frequency_writes;
+
+ /* Set of memory tags that contain VAR in their alias set. */
+ bitmap parent_tags;
+};
+
+typedef struct mem_sym_stats_d *mem_sym_stats_t;
+DEF_VEC_P(mem_sym_stats_t);
+DEF_VEC_ALLOC_P(mem_sym_stats_t, heap);
+
+/* Memory reference statistics collected during alias analysis. */
+struct mem_ref_stats_d GTY(())
+{
+ /* Number of statements that make memory references. */
+ long num_mem_stmts;
+
+ /* Number of statements that make function calls. */
+ long num_call_sites;
+
+ /* Number of statements that make calls to pure/const functions. */
+ long num_pure_const_call_sites;
+
+ /* Number of ASM statements. */
+ long num_asm_sites;
+
+ /* Estimated number of virtual operands needed as computed by
+ compute_memory_partitions. */
+ long num_vuses;
+ long num_vdefs;
+
+ /* This maps every symbol used to make "memory" references
+ (pointers, arrays, structures, etc) to an instance of struct
+ mem_sym_stats_d describing reference statistics for the symbol. */
+ struct pointer_map_t * GTY((skip)) mem_sym_stats;
+};
+
+
+/* Gimple dataflow datastructure. All publicly available fields shall have
+ gimple_ accessor defined in tree-flow-inline.h, all publicly modifiable
+ fields should have gimple_set accessor. */
+struct gimple_df GTY(())
+{
+ /* Array of all variables referenced in the function. */
+ htab_t GTY((param_is (union tree_node))) referenced_vars;
+
+ /* A list of all the noreturn calls passed to modify_stmt.
+ cleanup_control_flow uses it to detect cases where a mid-block
+ indirect call has been turned into a noreturn call. When this
+ happens, all the instructions after the call are no longer
+ reachable and must be deleted as dead. */
+ VEC(tree,gc) *modified_noreturn_calls;
+
+ /* Array of all SSA_NAMEs used in the function. */
+ VEC(tree,gc) *ssa_names;
+
+ /* Artificial variable used to model the effects of function calls. */
+ tree global_var;
+
+ /* Artificial variable used to model the effects of nonlocal
+ variables. */
+ tree nonlocal_all;
+
+ /* Call clobbered variables in the function. If bit I is set, then
+ REFERENCED_VARS (I) is call-clobbered. */
+ bitmap call_clobbered_vars;
+
+ /* Addressable variables in the function. If bit I is set, then
+ REFERENCED_VARS (I) has had its address taken. Note that
+ CALL_CLOBBERED_VARS and ADDRESSABLE_VARS are not related. An
+ addressable variable is not necessarily call-clobbered (e.g., a
+ local addressable whose address does not escape) and not all
+ call-clobbered variables are addressable (e.g., a local static
+ variable). */
+ bitmap addressable_vars;
+
+ /* Free list of SSA_NAMEs. */
+ tree free_ssanames;
+
+ /* Hashtable holding definition for symbol. If this field is not NULL, it
+ means that the first reference to this variable in the function is a
+ USE or a VUSE. In those cases, the SSA renamer creates an SSA name
+ for this variable with an empty defining statement. */
+ htab_t GTY((param_is (union tree_node))) default_defs;
+
+ /* 'true' after aliases have been computed (see compute_may_aliases). */
+ unsigned int aliases_computed_p : 1;
+
+ /* True if the code is in ssa form. */
+ unsigned int in_ssa_p : 1;
+
+ struct ssa_operands ssa_operands;
+
+ /* Hashtable of variables annotations. Used for static variables only;
+ local variables have direct pointer in the tree node. */
+ htab_t GTY((param_is (struct static_var_ann_d))) var_anns;
+
+ /* Memory reference statistics collected during alias analysis.
+ This information is used to drive the memory partitioning
+ heuristics in compute_memory_partitions. */
+ struct mem_ref_stats_d mem_ref_stats;
+};
+
+/* Accessors for internal use only. Generic code should use abstraction
+ provided by tree-flow-inline.h or specific modules. */
+#define FREE_SSANAMES(fun) (fun)->gimple_df->free_ssanames
+#define SSANAMES(fun) (fun)->gimple_df->ssa_names
+#define MODIFIED_NORETURN_CALLS(fun) (fun)->gimple_df->modified_noreturn_calls
+#define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs
typedef struct
{
/* Nonzero if this pointer points to NULL. */
unsigned int pt_null : 1;
+ /* Mask of reasons this pointer's value escapes the function */
+ ENUM_BITFIELD (escape_type) escape_mask : 9;
+
/* Set of variables that this pointer may point to. */
bitmap pt_vars;
pointer will be represented by this memory tag, instead of the type
tag computed by TBAA. */
tree name_mem_tag;
-
- /* Mask of reasons this pointer's value escapes the function */
- unsigned int escape_mask;
};
/*---------------------------------------------------------------------------
- Tree annotations stored in tree_common.ann
+ Tree annotations stored in tree_base.ann
---------------------------------------------------------------------------*/
enum tree_ann_type { TREE_ANN_COMMON, VAR_ANN, FUNCTION_ANN, STMT_ANN };
NEED_PHI_STATE_MAYBE
};
-struct subvar;
-typedef struct subvar *subvar_t;
-/* This structure represents a fake sub-variable for a structure field. */
-struct subvar GTY(())
-{
- /* Fake variable. */
- tree var;
+/* The "no alias" attribute allows alias analysis to make more
+ aggressive assumptions when assigning alias sets, computing
+ points-to information and memory partitions. These attributes
+ are the result of user annotations or flags (e.g.,
+ -fargument-noalias). */
+enum noalias_state {
+ /* Default state. No special assumptions can be made about this
+ symbol. */
+ MAY_ALIAS = 0,
+
+ /* The symbol does not alias with other symbols that have a
+ NO_ALIAS* attribute. */
+ NO_ALIAS,
+
+ /* The symbol does not alias with other symbols that have a
+ NO_ALIAS*, and it may not alias with global symbols. */
+ NO_ALIAS_GLOBAL,
- /* Next subvar for this structure. */
- subvar_t next;
+ /* The symbol does not alias with any other symbols. */
+ NO_ALIAS_ANYTHING
};
+
+typedef VEC(tree,gc) *subvar_t;
+
struct var_ann_d GTY(())
{
struct tree_ann_common_d common;
been seen yet or not. */
unsigned out_of_ssa_tag : 1;
- /* Used when building root_var structures in tree_ssa_live.[ch]. */
- unsigned root_var_processed : 1;
-
- /* Nonzero if this variable is in the alias set of another variable. */
- unsigned is_aliased : 1;
+ /* Used when building base variable structures in a var_map. */
+ unsigned base_var_processed : 1;
/* Nonzero if this variable was used after SSA optimizations were
applied. We set this when translating out of SSA form. */
ENUM_BITFIELD (need_phi_state) need_phi_state : 2;
/* Used during operand processing to determine if this variable is already
- in the vuse list. */
+ in the VUSE list. */
unsigned in_vuse_list : 1;
/* Used during operand processing to determine if this variable is already
- in the v_may_def list. */
- unsigned in_v_may_def_list : 1;
+ in the VDEF list. */
+ unsigned in_vdef_list : 1;
- /* True for HEAP and PARM_NOALIAS artificial variables. */
+ /* True for HEAP artificial variables. These variables represent
+ the memory area allocated by a call to malloc. */
unsigned is_heapvar : 1;
- /* An artificial variable representing the memory location pointed-to by
- all the pointer symbols that flow-insensitive alias analysis
- (mostly type-based) considers to be aliased. If the variable is
- not a pointer or if it is never dereferenced, this must be NULL. */
- tree symbol_mem_tag;
+ /* True if the variable is call clobbered. */
+ unsigned call_clobbered : 1;
+
+ /* This field describes several "no alias" attributes that some
+ symbols are known to have. See the enum's definition for more
+ information on each attribute. */
+ ENUM_BITFIELD (noalias_state) noalias_state : 2;
- /* Variables that may alias this variable. */
- VEC(tree, gc) *may_aliases;
+ /* Mask of values saying the reasons why this variable has escaped
+ the function. */
+ ENUM_BITFIELD (escape_type) escape_mask : 9;
+
+ /* Memory partition tag assigned to this symbol. */
+ tree mpt;
+
+ /* If this variable is a pointer P that has been dereferenced, this
+ field is an artificial variable that represents the memory
+ location *P. Every other pointer Q that is type-compatible with
+ P will also have the same memory tag. If the variable is not a
+ pointer or if it is never dereferenced, this must be NULL.
+ FIXME, do we really need this here? How much slower would it be
+ to convert to hash table? */
+ tree symbol_mem_tag;
/* Used when going out of SSA form to indicate which partition this
variable represents storage for. */
unsigned partition;
- /* Used by the root-var object in tree-ssa-live.[ch]. */
- unsigned root_index;
+ /* Used by var_map for the base index of ssa base variables. */
+ unsigned base_index;
/* During into-ssa and the dominator optimizer, this field holds the
current version of this variable (an SSA_NAME). */
tree current_def;
-
- /* If this variable is a structure, this fields holds a list of
- symbols representing each of the fields of the structure. */
- subvar_t subvars;
- /* Mask of values saying the reasons why this variable has escaped
- the function. */
- unsigned int escape_mask;
+ /* If this variable is a structure, this fields holds an array
+ of symbols representing each of the fields of the structure. */
+ VEC(tree,gc) *subvars;
+};
+
+/* Container for variable annotation used by hashtable for annotations for
+ static variables. */
+struct static_var_ann_d GTY(())
+{
+ struct var_ann_d ann;
+ unsigned int uid;
};
struct function_ann_d GTY(())
{
struct tree_ann_common_d common;
- /* Nonzero if the statement has been modified (meaning that the operands
- need to be scanned again). */
- unsigned modified : 1;
-
- /* Nonzero if the statement makes references to volatile storage. */
- unsigned has_volatile_ops : 1;
-
- /* Nonzero if the statement makes a function call that may clobber global
- and local addressable variables. */
- unsigned makes_clobbering_call : 1;
-
/* Basic block that contains this statement. */
basic_block bb;
pass which needs statement UIDs. */
unsigned int uid;
- /* Linked list of histograms for value-based profiling. This is really a
- struct histogram_value*. We use void* to avoid having to export that
- everywhere, and to avoid having to put it in GC memory. */
-
- void * GTY ((skip (""))) histograms;
+ /* Nonzero if the statement references memory (at least one of its
+ expressions contains a non-register operand). */
+ unsigned references_memory : 1;
+
+ /* Nonzero if the statement has been modified (meaning that the operands
+ need to be scanned again). */
+ unsigned modified : 1;
+
+ /* Nonzero if the statement makes references to volatile storage. */
+ unsigned has_volatile_ops : 1;
};
union tree_ann_d GTY((desc ("ann_type ((tree_ann_t)&%h)")))
struct stmt_ann_d GTY((tag ("STMT_ANN"))) stmt;
};
-extern GTY(()) VEC(tree,gc) *modified_noreturn_calls;
-
typedef union tree_ann_d *tree_ann_t;
typedef struct var_ann_d *var_ann_t;
typedef struct function_ann_d *function_ann_t;
typedef struct stmt_ann_d *stmt_ann_t;
typedef struct tree_ann_common_d *tree_ann_common_t;
-static inline tree_ann_common_t tree_common_ann (tree);
+static inline tree_ann_common_t tree_common_ann (const_tree);
static inline tree_ann_common_t get_tree_common_ann (tree);
-static inline var_ann_t var_ann (tree);
+static inline var_ann_t var_ann (const_tree);
static inline var_ann_t get_var_ann (tree);
-static inline function_ann_t function_ann (tree);
+static inline function_ann_t function_ann (const_tree);
static inline function_ann_t get_function_ann (tree);
static inline stmt_ann_t stmt_ann (tree);
static inline bool has_stmt_ann (tree);
static inline bool noreturn_call_p (tree);
static inline void update_stmt (tree);
static inline bool stmt_modified_p (tree);
-static inline VEC(tree, gc) *may_aliases (tree);
-static inline int get_lineno (tree);
-static inline const char *get_filename (tree);
-static inline bool is_exec_stmt (tree);
-static inline bool is_label_stmt (tree);
+static inline bitmap may_aliases (const_tree);
+static inline int get_lineno (const_tree);
static inline bitmap addresses_taken (tree);
/*---------------------------------------------------------------------------
};
/* Accessors for basic block annotations. */
-static inline tree phi_nodes (basic_block);
+static inline tree phi_nodes (const_basic_block);
static inline void set_phi_nodes (basic_block, tree);
/*---------------------------------------------------------------------------
extern unsigned int int_tree_map_hash (const void *);
extern int int_tree_map_eq (const void *, const void *);
+extern unsigned int uid_decl_map_hash (const void *);
+extern int uid_decl_map_eq (const void *, const void *);
+
typedef struct
{
htab_iterator hti;
VEC_iterate (tree, (VEC), (ITER).i, (VAR)); \
(ITER).i++)
-/* Array of all variables referenced in the function. */
-extern GTY((param_is (struct int_tree_map))) htab_t referenced_vars;
-
-/* Default defs for undefined symbols. */
-extern GTY((param_is (struct int_tree_map))) htab_t default_defs;
-
extern tree referenced_var_lookup (unsigned int);
extern bool referenced_var_check_and_insert (tree);
-#define num_referenced_vars htab_elements (referenced_vars)
+#define num_referenced_vars htab_elements (gimple_referenced_vars (cfun))
#define referenced_var(i) referenced_var_lookup (i)
-/* Array of all SSA_NAMEs used in the function. */
-extern GTY(()) VEC(tree,gc) *ssa_names;
-
-#define num_ssa_names (VEC_length (tree, ssa_names))
-#define ssa_name(i) (VEC_index (tree, ssa_names, (i)))
-
-/* Artificial variable used to model the effects of function calls. */
-extern GTY(()) tree global_var;
-
-/* Artificial variable used to model the effects of nonlocal
- variables. */
-extern GTY(()) tree nonlocal_all;
-
-/* Call clobbered variables in the function. If bit I is set, then
- REFERENCED_VARS (I) is call-clobbered. */
-extern bitmap call_clobbered_vars;
-
-/* Addressable variables in the function. If bit I is set, then
- REFERENCED_VARS (I) has had its address taken. */
-extern bitmap addressable_vars;
-
-/* 'true' after aliases have been computed (see compute_may_aliases). */
-extern bool aliases_computed_p;
+#define num_ssa_names (VEC_length (tree, cfun->gimple_df->ssa_names))
+#define ssa_name(i) (VEC_index (tree, cfun->gimple_df->ssa_names, (i)))
/* Macros for showing usage statistics. */
#define SCALE(x) ((unsigned long) ((x) < 1024*10 \
extern struct omp_region *new_omp_region (basic_block, enum tree_code,
struct omp_region *);
extern void free_omp_regions (void);
+void omp_expand_local (basic_block);
+extern tree find_omp_clause (tree, enum tree_code);
+tree copy_var_decl (tree, tree, tree);
/*---------------------------------------------------------------------------
Function prototypes
#define PENDING_STMT(e) ((e)->insns.t)
extern void delete_tree_cfg_annotations (void);
-extern void disband_implicit_edges (void);
-extern bool stmt_ends_bb_p (tree);
-extern bool is_ctrl_stmt (tree);
-extern bool is_ctrl_altering_stmt (tree);
-extern bool computed_goto_p (tree);
-extern bool simple_goto_p (tree);
-extern bool tree_can_make_abnormal_goto (tree);
+extern bool stmt_ends_bb_p (const_tree);
+extern bool is_ctrl_stmt (const_tree);
+extern bool is_ctrl_altering_stmt (const_tree);
+extern bool computed_goto_p (const_tree);
+extern bool simple_goto_p (const_tree);
+extern bool tree_can_make_abnormal_goto (const_tree);
extern basic_block single_noncomplex_succ (basic_block bb);
extern void tree_dump_bb (basic_block, FILE *, int);
extern void debug_tree_bb (basic_block);
extern void dump_tree_cfg (FILE *, int);
extern void debug_tree_cfg (int);
extern void dump_cfg_stats (FILE *);
+extern void dot_cfg (void);
extern void debug_cfg_stats (void);
-extern void debug_loop_ir (void);
-extern void print_loop_ir (FILE *);
+extern void debug_loops (int);
+extern void debug_loop (struct loop *, int);
+extern void debug_loop_num (unsigned, int);
+extern void print_loops (FILE *, int);
+extern void print_loops_bb (FILE *, basic_block, int, int);
extern void cleanup_dead_labels (void);
extern void group_case_labels (void);
extern tree first_stmt (basic_block);
extern tree last_stmt (basic_block);
-extern tree *last_stmt_ptr (basic_block);
extern tree last_and_only_stmt (basic_block);
extern edge find_taken_edge (basic_block, tree);
extern basic_block label_to_block_fn (struct function *, tree);
extern void notice_special_calls (tree);
extern void clear_special_calls (void);
extern void verify_stmts (void);
+extern void verify_gimple (void);
+extern void verify_gimple_1 (tree);
extern tree tree_block_label (basic_block);
extern void extract_true_false_edges_from_block (basic_block, edge *, edge *);
extern bool tree_duplicate_sese_region (edge, edge, basic_block *, unsigned,
basic_block *);
+extern bool tree_duplicate_sese_tail (edge, edge, basic_block *, unsigned,
+ basic_block *);
extern void add_phi_args_after_copy_bb (basic_block);
-extern void add_phi_args_after_copy (basic_block *, unsigned);
+extern void add_phi_args_after_copy (basic_block *, unsigned, edge);
extern bool tree_purge_dead_abnormal_call_edges (basic_block);
extern bool tree_purge_dead_eh_edges (basic_block);
-extern bool tree_purge_all_dead_eh_edges (bitmap);
+extern bool tree_purge_all_dead_eh_edges (const_bitmap);
extern tree gimplify_val (block_stmt_iterator *, tree, tree);
extern tree gimplify_build1 (block_stmt_iterator *, enum tree_code,
tree, tree);
extern void end_recording_case_labels (void);
extern basic_block move_sese_region_to_fn (struct function *, basic_block,
basic_block);
+void remove_edge_and_dominated_blocks (edge);
+void mark_virtual_ops_in_bb (basic_block);
/* In tree-cfgcleanup.c */
+extern bitmap cfgcleanup_altered_bbs;
extern bool cleanup_tree_cfg (void);
-extern void cleanup_tree_cfg_loop (void);
/* In tree-pretty-print.c. */
extern void dump_generic_bb (FILE *, basic_block, int, int);
+extern const char *op_symbol_code (enum tree_code);
/* In tree-dfa.c */
extern var_ann_t create_var_ann (tree);
extern void debug_subvars_for (tree);
extern tree get_virtual_var (tree);
extern void add_referenced_var (tree);
-extern void mark_new_vars_to_rename (tree);
+extern void remove_referenced_var (tree);
+extern void mark_symbols_for_renaming (tree);
extern void find_new_referenced_vars (tree *);
-
extern tree make_rename_temp (tree, const char *);
extern void set_default_def (tree, tree);
-extern tree default_def (tree);
-extern tree default_def_fn (struct function *, tree);
+extern tree gimple_default_def (struct function *, tree);
+extern bool stmt_references_abnormal_ssa_name (tree);
+extern bool refs_may_alias_p (tree, tree);
+extern tree get_single_def_stmt (tree);
+extern tree get_single_def_stmt_from_phi (tree, tree);
+extern tree get_single_def_stmt_with_phi (tree, tree);
/* In tree-phinodes.c */
extern void reserve_phi_args_for_new_edge (basic_block);
extern tree create_phi_node (tree, basic_block);
extern void add_phi_arg (tree, tree, edge);
extern void remove_phi_args (edge);
-extern void remove_phi_node (tree, tree);
+extern void remove_phi_node (tree, tree, bool);
extern tree phi_reverse (tree);
/* In gimple-low.c */
extern void record_vars_into (tree, tree);
extern void record_vars (tree);
-extern bool block_may_fallthru (tree);
+extern bool block_may_fallthru (const_tree);
/* In tree-ssa-alias.c */
+extern unsigned int compute_may_aliases (void);
extern void dump_may_aliases_for (FILE *, tree);
extern void debug_may_aliases_for (tree);
extern void dump_alias_info (FILE *);
extern void dump_points_to_info_for (FILE *, tree);
extern void debug_points_to_info_for (tree);
extern bool may_be_aliased (tree);
-extern bool is_aliased_with (tree, tree);
extern struct ptr_info_def *get_ptr_info (tree);
extern void new_type_alias (tree, tree, tree);
-extern void count_uses_and_derefs (tree, tree, unsigned *, unsigned *, bool *);
+extern void count_uses_and_derefs (tree, tree, unsigned *, unsigned *,
+ unsigned *);
static inline subvar_t get_subvars_for_var (tree);
static inline tree get_subvar_at (tree, unsigned HOST_WIDE_INT);
-static inline bool ref_contains_array_ref (tree);
-static inline bool array_ref_contains_indirect_ref (tree);
+static inline bool ref_contains_array_ref (const_tree);
+static inline bool array_ref_contains_indirect_ref (const_tree);
extern tree get_ref_base_and_extent (tree, HOST_WIDE_INT *,
HOST_WIDE_INT *, HOST_WIDE_INT *);
-static inline bool var_can_have_subvars (tree);
+static inline bool var_can_have_subvars (const_tree);
static inline bool overlap_subvar (unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT,
- tree, bool *);
+ const_tree, bool *);
+extern tree create_tag_raw (enum tree_code, tree, const char *);
+extern void delete_mem_ref_stats (struct function *);
+extern void dump_mem_ref_stats (FILE *);
+extern void debug_mem_ref_stats (void);
+extern void debug_memory_partitions (void);
+extern void debug_mem_sym_stats (tree var);
+extern void dump_mem_sym_stats_for_var (FILE *, tree);
+extern void debug_all_mem_sym_stats (void);
/* Call-back function for walk_use_def_chains(). At each reaching
definition, a function with this prototype is called. */
typedef bool (*walk_use_def_chains_fn) (tree, tree, void *);
+/* In tree-ssa-alias-warnings.c */
+extern void strict_aliasing_warning_backend (void);
+
/* In tree-ssa.c */
+
+/* Mapping for redirected edges. */
+struct _edge_var_map GTY(())
+{
+ tree result; /* PHI result. */
+ tree def; /* PHI arg definition. */
+};
+typedef struct _edge_var_map edge_var_map;
+
+DEF_VEC_O(edge_var_map);
+DEF_VEC_ALLOC_O(edge_var_map, heap);
+
+/* A vector of var maps. */
+typedef VEC(edge_var_map, heap) *edge_var_map_vector;
+
+extern void redirect_edge_var_map_add (edge, tree, tree);
+extern void redirect_edge_var_map_clear (edge);
+extern void redirect_edge_var_map_dup (edge, edge);
+extern edge_var_map_vector redirect_edge_var_map_vector (edge);
+extern void redirect_edge_var_map_destroy (void);
+
+
extern void init_tree_ssa (void);
extern edge ssa_redirect_edge (edge, basic_block);
extern void flush_pending_stmts (edge);
extern bool tree_ssa_useless_type_conversion (tree);
-extern bool tree_ssa_useless_type_conversion_1 (tree, tree);
+extern bool useless_type_conversion_p (tree, tree);
+extern bool types_compatible_p (tree, tree);
extern void verify_ssa (bool);
extern void delete_tree_ssa (void);
-extern void register_new_def (tree, VEC(tree,heap) **);
extern void walk_use_def_chains (tree, walk_use_def_chains_fn, void *, bool);
extern bool stmt_references_memory_p (tree);
+extern bool ssa_undefined_value_p (tree);
+
/* In tree-into-ssa.c */
void update_ssa (unsigned);
bool name_mappings_registered_p (void);
bool name_registered_for_update_p (tree);
bitmap ssa_names_to_replace (void);
-void release_ssa_name_after_update_ssa (tree name);
+void release_ssa_name_after_update_ssa (tree);
void compute_global_livein (bitmap, bitmap);
tree duplicate_ssa_name (tree, tree);
void mark_sym_for_renaming (tree);
/* In tree-ssa-ccp.c */
bool fold_stmt (tree *);
bool fold_stmt_inplace (tree);
+tree get_symbol_constant_value (tree);
+tree fold_const_aggregate_ref (tree);
tree widen_bitfield (tree, tree, tree);
/* In tree-vrp.c */
-tree vrp_evaluate_conditional (tree, bool);
+tree vrp_evaluate_conditional (tree, tree);
void simplify_stmt_using_ranges (tree);
/* In tree-ssa-dom.c */
a loop (provided that assumptions == true and
may_be_zero == false), more precisely the number
of executions of the latch of the loop. */
- tree additional_info; /* The boolean expression. Sometimes we use additional
- knowledge to simplify the other expressions
- contained in this structure (for example the
- knowledge about value ranges of operands on entry to
- the loop). If this is a case, conjunction of such
- condition is stored in this field, so that we do not
- lose the information: for example if may_be_zero
- is (n <= 0) and niter is (unsigned) n, we know
- that the number of iterations is at most
- MAX_SIGNED_INT. However if the (n <= 0) assumption
- is eliminated (by looking at the guard on entry of
- the loop), then the information would be lost. */
+ double_int max; /* The upper bound on the number of iterations of
+ the loop. */
/* The simplified shape of the exit condition. The loop exits if
CONTROL CMP BOUND is false, where CMP is one of NE_EXPR,
};
/* In tree-vectorizer.c */
-unsigned vectorize_loops (struct loops *);
-extern bool vect_can_force_dr_alignment_p (tree, unsigned int);
+unsigned vectorize_loops (void);
+extern bool vect_can_force_dr_alignment_p (const_tree, unsigned int);
extern tree get_vectype_for_scalar_type (tree);
/* In tree-ssa-phiopt.c */
bool empty_block_p (basic_block);
+basic_block *blocks_in_phiopt_order (void);
/* In tree-ssa-loop*.c */
-void tree_ssa_lim (struct loops *);
-unsigned int tree_ssa_unswitch_loops (struct loops *);
-unsigned int canonicalize_induction_variables (struct loops *);
-unsigned int tree_unroll_loops_completely (struct loops *, bool);
-unsigned int tree_ssa_prefetch_arrays (struct loops *);
-unsigned int remove_empty_loops (struct loops *);
-void tree_ssa_iv_optimize (struct loops *);
+void tree_ssa_lim (void);
+unsigned int tree_ssa_unswitch_loops (void);
+unsigned int canonicalize_induction_variables (void);
+unsigned int tree_unroll_loops_completely (bool);
+unsigned int tree_ssa_prefetch_arrays (void);
+unsigned int remove_empty_loops (void);
+void tree_ssa_iv_optimize (void);
+unsigned tree_predictive_commoning (void);
+bool parallelize_loops (void);
bool number_of_iterations_exit (struct loop *, edge,
struct tree_niter_desc *niter, bool);
tree find_loop_niter (struct loop *, edge *);
tree loop_niter_by_eval (struct loop *, edge);
tree find_loop_niter_by_eval (struct loop *, edge *);
-void estimate_numbers_of_iterations (struct loops *);
+void estimate_numbers_of_iterations (void);
bool scev_probably_wraps_p (tree, tree, tree, struct loop *, bool);
bool convert_affine_scev (struct loop *, tree, tree *, tree *, tree, bool);
bool nowrap_type_p (tree);
enum ev_direction {EV_DIR_GROWS, EV_DIR_DECREASES, EV_DIR_UNKNOWN};
-enum ev_direction scev_direction (tree);
+enum ev_direction scev_direction (const_tree);
-void free_numbers_of_iterations_estimates (struct loops *);
+void free_numbers_of_iterations_estimates (void);
void free_numbers_of_iterations_estimates_loop (struct loop *);
void rewrite_into_loop_closed_ssa (bitmap, unsigned);
void verify_loop_closed_ssa (void);
-void loop_commit_inserts (void);
bool for_each_index (tree *, bool (*) (tree, tree *, void *), void *);
void create_iv (tree, tree, tree, struct loop *, block_stmt_iterator *, bool,
tree *, tree *);
-void split_loop_exit_edge (edge);
-unsigned force_expr_to_var_cost (tree);
-basic_block bsi_insert_on_edge_immediate_loop (edge, tree);
+basic_block split_loop_exit_edge (edge);
void standard_iv_increment_position (struct loop *, block_stmt_iterator *,
bool *);
basic_block ip_end_pos (struct loop *);
basic_block ip_normal_pos (struct loop *);
-bool tree_duplicate_loop_to_header_edge (struct loop *, edge, struct loops *,
+bool tree_duplicate_loop_to_header_edge (struct loop *, edge,
unsigned int, sbitmap,
- edge, edge *,
- unsigned int *, int);
-struct loop *tree_ssa_loop_version (struct loops *, struct loop *, tree,
+ edge, VEC (edge, heap) **,
+ int);
+struct loop *slpeel_tree_duplicate_loop_to_edge_cfg (struct loop *, edge);
+void rename_variables_in_loop (struct loop *);
+struct loop *tree_ssa_loop_version (struct loop *, tree,
basic_block *);
tree expand_simple_operations (tree);
void substitute_in_loop_info (struct loop *, tree, tree);
edge single_dom_exit (struct loop *);
bool can_unroll_loop_p (struct loop *loop, unsigned factor,
struct tree_niter_desc *niter);
-void tree_unroll_loop (struct loops *, struct loop *, unsigned,
+void tree_unroll_loop (struct loop *, unsigned,
edge, struct tree_niter_desc *);
+typedef void (*transform_callback)(struct loop *, void *);
+void tree_transform_and_unroll_loop (struct loop *, unsigned,
+ edge, struct tree_niter_desc *,
+ transform_callback, void *);
bool contains_abnormal_ssa_name_p (tree);
+bool stmt_dominates_stmt_p (tree, tree);
+void mark_virtual_ops_for_renaming (tree);
/* In tree-ssa-threadedge.c */
extern bool potentially_threadable_block (basic_block);
extern void thread_across_edge (tree, edge, bool,
- VEC(tree, heap) **, tree (*) (tree));
+ VEC(tree, heap) **, tree (*) (tree, tree));
/* In tree-ssa-loop-im.c */
/* The possibilities of statement movement. */
MOVE_POSSIBLE /* Unlimited movement. */
};
extern enum move_pos movement_possibility (tree);
-
-/* The reasons a variable may escape a function. */
-enum escape_type
- {
- NO_ESCAPE = 0, /* Doesn't escape. */
- ESCAPE_STORED_IN_GLOBAL = 1 << 1,
- ESCAPE_TO_ASM = 1 << 2, /* Passed by address to an assembly
- statement. */
- ESCAPE_TO_CALL = 1 << 3, /* Escapes to a function call. */
- ESCAPE_BAD_CAST = 1 << 4, /* Cast from pointer to integer */
- ESCAPE_TO_RETURN = 1 << 5, /* Returned from function. */
- ESCAPE_TO_PURE_CONST = 1 << 6, /* Escapes to a pure or constant
- function call. */
- ESCAPE_IS_GLOBAL = 1 << 7, /* Is a global variable. */
- ESCAPE_IS_PARM = 1 << 8, /* Is an incoming function parameter. */
- ESCAPE_UNKNOWN = 1 << 9 /* We believe it escapes for some reason
- not enumerated above. */
- };
+char *get_lsm_tmp_name (tree, unsigned);
/* In tree-flow-inline.h */
-static inline bool is_call_clobbered (tree);
+static inline bool is_call_clobbered (const_tree);
static inline void mark_call_clobbered (tree, unsigned int);
static inline void set_is_used (tree);
-static inline bool unmodifiable_var_p (tree);
+static inline bool unmodifiable_var_p (const_tree);
/* In tree-eh.c */
extern void make_eh_edges (tree);
extern bool tree_could_trap_p (tree);
extern bool tree_could_throw_p (tree);
-extern bool tree_can_throw_internal (tree);
+extern bool tree_can_throw_internal (const_tree);
extern bool tree_can_throw_external (tree);
-extern int lookup_stmt_eh_region (tree);
+extern int lookup_stmt_eh_region (const_tree);
extern void add_stmt_to_eh_region (tree, int);
extern bool remove_stmt_from_eh_region (tree);
extern bool maybe_clean_or_replace_eh_stmt (tree, tree);
/* In tree-vn.c */
+tree make_value_handle (tree);
+void set_value_handle (tree, tree);
bool expressions_equal_p (tree, tree);
static inline tree get_value_handle (tree);
-hashval_t vn_compute (tree, hashval_t);
void sort_vuses (VEC (tree, gc) *);
-tree vn_lookup_or_add (tree, tree);
+void sort_vuses_heap (VEC (tree, heap) *);
+tree vn_lookup_or_add (tree);
+tree vn_lookup_or_add_with_stmt (tree, tree);
tree vn_lookup_or_add_with_vuses (tree, VEC (tree, gc) *);
void vn_add (tree, tree);
void vn_add_with_vuses (tree, tree, VEC (tree, gc) *);
-tree vn_lookup (tree, tree);
+tree vn_lookup_with_stmt (tree, tree);
+tree vn_lookup (tree);
tree vn_lookup_with_vuses (tree, VEC (tree, gc) *);
-void vn_init (void);
-void vn_delete (void);
/* In tree-ssa-sink.c */
bool is_hidden_global_store (tree);
bool sra_type_can_be_decomposed_p (tree);
/* In tree-loop-linear.c */
-extern void linear_transform_loops (struct loops *);
+extern void linear_transform_loops (void);
+
+/* In tree-data-ref.c */
+extern void tree_check_data_deps (void);
/* In tree-ssa-loop-ivopts.c */
bool expr_invariant_in_loop_p (struct loop *, tree);
-bool multiplier_allowed_in_address_p (HOST_WIDE_INT);
+bool multiplier_allowed_in_address_p (HOST_WIDE_INT, enum machine_mode);
unsigned multiply_by_cost (HOST_WIDE_INT, enum machine_mode);
/* In tree-ssa-threadupdate.c. */
-extern bool thread_through_all_blocks (void);
+extern bool thread_through_all_blocks (bool);
extern void register_jump_thread (edge, edge);
/* In gimplify.c */
tree force_gimple_operand (tree, tree *, bool, tree);
-tree force_gimple_operand_bsi (block_stmt_iterator *, tree, bool, tree);
+tree force_gimple_operand_bsi (block_stmt_iterator *, tree, bool, tree,
+ bool, enum bsi_iterator_update);
+tree gimple_fold_indirect_ref (tree);
/* In tree-ssa-structalias.c */
bool find_what_p_points_to (tree);
/* In tree-ssa-address.c */
-/* Affine combination of trees. We keep track of at most MAX_AFF_ELTS elements
- to make things simpler; this is sufficient in most cases. */
-
-#define MAX_AFF_ELTS 8
-
-struct affine_tree_combination
-{
- /* Type of the result of the combination. */
- tree type;
-
- /* Mask modulo that the operations are performed. */
- unsigned HOST_WIDE_INT mask;
-
- /* Constant offset. */
- unsigned HOST_WIDE_INT offset;
-
- /* Number of elements of the combination. */
- unsigned n;
-
- /* Elements and their coefficients. */
- tree elts[MAX_AFF_ELTS];
- unsigned HOST_WIDE_INT coefs[MAX_AFF_ELTS];
-
- /* Remainder of the expression. */
- tree rest;
-};
-
/* Description of a memory address. */
struct mem_address
tree symbol, base, index, step, offset;
};
+struct affine_tree_combination;
tree create_mem_ref (block_stmt_iterator *, tree,
struct affine_tree_combination *);
rtx addr_for_mem_ref (struct mem_address *, bool);
void get_address_description (tree, struct mem_address *);
tree maybe_fold_tmr (tree);
-/* This structure is simply used during pushing fields onto the fieldstack
- to track the offset of the field, since bitpos_of_field gives it relative
- to its immediate containing type, and we want it relative to the ultimate
- containing object. */
+/* This structure is used during pushing fields onto the fieldstack
+ to track the offset of the field, since bitpos_of_field gives it
+ relative to its immediate containing type, and we want it relative
+ to the ultimate containing object. */
struct fieldoff
{
+ /* Type of the field. */
tree type;
+
+ /* Size, in bits, of the field. */
tree size;
+
+ /* Field. */
tree decl;
+
+ /* Offset from the base of the base containing object to this field. */
HOST_WIDE_INT offset;
+
+ /* Alias set for the field. */
+ alias_set_type alias_set;
+
+ /* True, if this offset can be a base for further component accesses. */
+ unsigned base_for_components : 1;
};
typedef struct fieldoff fieldoff_s;
DEF_VEC_O(fieldoff_s);
DEF_VEC_ALLOC_O(fieldoff_s,heap);
int push_fields_onto_fieldstack (tree, VEC(fieldoff_s,heap) **,
- HOST_WIDE_INT, bool *);
+ HOST_WIDE_INT, bool *, tree);
void sort_fieldstack (VEC(fieldoff_s,heap) *);
void init_alias_heapvars (void);
void delete_alias_heapvars (void);
+unsigned int execute_fixup_cfg (void);
#include "tree-flow-inline.h"
void swap_tree_operands (tree, tree *, tree *);
-extern void recalculate_used_alone (void);
-extern bool updating_used_alone;
-
int least_common_multiple (int, int);
#endif /* _TREE_FLOW_H */