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
---------------------------------------------------------------------------*/
-enum tree_ann_type { TREE_ANN_COMMON, VAR_ANN, STMT_ANN };
+enum tree_ann_type { TREE_ANN_COMMON, VAR_ANN, FUNCTION_ANN, STMT_ANN };
struct tree_ann_common_d GTY(())
{
NEED_PHI_STATE_MAYBE
};
-
-/* When computing aliasing information, we represent the memory pointed-to
- by pointers with artificial variables called "memory tags" (MT). There
- are two kinds of tags: type and name. Type tags (TMT) are used in
- type-based alias analysis, they represent all the pointed-to locations
- and variables of the same alias set class. Name tags (NMT) are used in
- flow-sensitive points-to alias analysis, they represent the variables
- and memory locations pointed-to by a specific SSA_NAME pointer. */
-enum mem_tag_kind {
- /* This variable is not a memory tag. */
- NOT_A_TAG,
-
- /* This variable is a type memory tag (TMT). */
- TYPE_TAG,
-
- /* This variable is a name memory tag (NMT). */
- NAME_TAG,
-
- /* This variable represents a structure field. */
- STRUCT_FIELD
-};
-
struct subvar;
typedef struct subvar *subvar_t;
/* Fake variable. */
tree var;
- /* Offset inside structure. */
- unsigned HOST_WIDE_INT offset;
-
- /* Size of the field. */
- unsigned HOST_WIDE_INT size;
-
/* Next subvar for this structure. */
subvar_t next;
};
/* Used when building root_var structures in tree_ssa_live.[ch]. */
unsigned root_var_processed : 1;
- /* If nonzero, this variable is a memory tag. */
- ENUM_BITFIELD (mem_tag_kind) mem_tag_kind : 2;
-
- /* Nonzero if this variable is an alias tag that represents references to
- other variables (i.e., this variable appears in the MAY_ALIASES array
- of other variables). */
- unsigned is_alias_tag : 1;
+ /* Nonzero if this variable is in the alias set of another variable. */
+ unsigned is_aliased : 1;
/* Nonzero if this variable was used after SSA optimizations were
applied. We set this when translating out of SSA form. */
unsigned in_v_may_def_list : 1;
/* An artificial variable representing the memory location pointed-to by
- all the pointers that TBAA (type-based alias analysis) considers
- to be aliased. If the variable is not a pointer or if it is never
- dereferenced, this must be NULL. */
- tree type_mem_tag;
+ 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;
/* Variables that may alias this variable. */
- varray_type may_aliases;
+ VEC(tree, gc) *may_aliases;
/* Used when going out of SSA form to indicate which partition this
variable represents storage for. */
/* Used by the root-var object in tree-ssa-live.[ch]. */
unsigned root_index;
- /* Default definition for this 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. */
- tree default_def;
-
/* During into-ssa and the dominator optimizer, this field holds the
current version of this variable (an SSA_NAME). */
tree current_def;
- /* Pointer to the structure that contains the sets of global
- variables modified by function calls. This field is only used
- for FUNCTION_DECLs. */
- ipa_reference_vars_info_t GTY ((skip)) reference_vars_info;
-
/* 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;
};
+struct function_ann_d GTY(())
+{
+ struct tree_ann_common_d common;
+
+ /* Pointer to the structure that contains the sets of global
+ variables modified by function calls. This field is only used
+ for FUNCTION_DECLs. */
+ ipa_reference_vars_info_t GTY ((skip)) reference_vars_info;
+};
typedef struct immediate_use_iterator_d
{
+ /* This is the current use the iterator is processing. */
ssa_use_operand_t *imm_use;
+ /* This marks the last use in the list (use node from SSA_NAME) */
ssa_use_operand_t *end_p;
+ /* This node is inserted and used to mark the end of the uses for a stmt. */
ssa_use_operand_t iter_node;
+ /* This is the next ssa_name to visit. IMM_USE may get removed before
+ the next one is traversed to, so it must be cached early. */
+ ssa_use_operand_t *next_imm_name;
} imm_use_iterator;
!end_readonly_imm_use_p (&(ITER)); \
(DEST) = next_readonly_imm_use (&(ITER)))
+/* Use this iterator to visit each stmt which has a use of SSAVAR. */
-#define FOR_EACH_IMM_USE_SAFE(DEST, ITER, SSAVAR) \
- for ((DEST) = first_safe_imm_use (&(ITER), (SSAVAR)); \
- !end_safe_imm_use_p (&(ITER)); \
- (DEST) = next_safe_imm_use (&(ITER)))
+#define FOR_EACH_IMM_USE_STMT(STMT, ITER, SSAVAR) \
+ for ((STMT) = first_imm_use_stmt (&(ITER), (SSAVAR)); \
+ !end_imm_use_stmt_p (&(ITER)); \
+ (STMT) = next_imm_use_stmt (&(ITER)))
-#define BREAK_FROM_SAFE_IMM_USE(ITER) \
+/* Use this to terminate the FOR_EACH_IMM_USE_STMT loop early. Failure to
+ do so will result in leaving a iterator marker node in the immediate
+ use list, and nothing good will come from that. */
+#define BREAK_FROM_IMM_USE_STMT(ITER) \
{ \
- end_safe_imm_use_traverse (&(ITER)); \
+ end_imm_use_stmt_traverse (&(ITER)); \
break; \
}
+
+/* Use this iterator in combination with FOR_EACH_IMM_USE_STMT to
+ get access to each occurrence of ssavar on the stmt returned by
+ that iterator.. for instance:
+
+ FOR_EACH_IMM_USE_STMT (stmt, iter, var)
+ {
+ FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
+ {
+ SET_USE (use_p) = blah;
+ }
+ update_stmt (stmt);
+ } */
+
+#define FOR_EACH_IMM_USE_ON_STMT(DEST, ITER) \
+ for ((DEST) = first_imm_use_on_stmt (&(ITER)); \
+ !end_imm_use_on_stmt_p (&(ITER)); \
+ (DEST) = next_imm_use_on_stmt (&(ITER)))
+
+
+
struct stmt_ann_d GTY(())
{
struct tree_ann_common_d common;
need to be scanned again). */
unsigned modified : 1;
- /* Nonzero if the statement makes aliased loads. */
- unsigned makes_aliased_loads : 1;
-
- /* Nonzero if the statement makes aliased stores. */
- unsigned makes_aliased_stores : 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 tree_ann_common_d GTY((tag ("TREE_ANN_COMMON"))) common;
- struct var_ann_d GTY((tag ("VAR_ANN"))) decl;
+ struct var_ann_d GTY((tag ("VAR_ANN"))) vdecl;
+ struct function_ann_d GTY((tag ("FUNCTION_ANN"))) fdecl;
struct stmt_ann_d GTY((tag ("STMT_ANN"))) stmt;
};
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;
static inline tree_ann_t tree_ann (tree);
static inline tree_ann_t get_tree_ann (tree);
static inline var_ann_t var_ann (tree);
static inline var_ann_t get_var_ann (tree);
+static inline function_ann_t function_ann (tree);
+static inline function_ann_t get_function_ann (tree);
static inline stmt_ann_t stmt_ann (tree);
static inline stmt_ann_t get_stmt_ann (tree);
static inline enum tree_ann_type ann_type (tree_ann_t);
static inline bool noreturn_call_p (tree);
static inline void update_stmt (tree);
static inline bool stmt_modified_p (tree);
-static inline varray_type may_aliases (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 addresses_taken (tree);
-static inline void set_default_def (tree, tree);
-static inline tree default_def (tree);
/*---------------------------------------------------------------------------
Structure representing predictions in tree level.
---------------------------------------------------------------------------*/
-struct edge_prediction GTY((chain_next ("%h.next")))
+struct edge_prediction GTY((chain_next ("%h.ep_next")))
{
- struct edge_prediction *next;
- edge edge;
- enum br_predictor predictor;
- int probability;
+ struct edge_prediction *ep_next;
+ edge ep_edge;
+ enum br_predictor ep_predictor;
+ int ep_probability;
};
/* Accessors for basic block annotations. */
/* 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 tree referenced_var_lookup_if_exists (unsigned int);
#define num_referenced_vars htab_elements (referenced_vars)
#define referenced_var(i) referenced_var_lookup (i)
static inline tree bsi_stmt (block_stmt_iterator);
static inline tree * bsi_stmt_ptr (block_stmt_iterator);
-extern void bsi_remove (block_stmt_iterator *);
+extern void bsi_remove (block_stmt_iterator *, bool);
extern void bsi_move_before (block_stmt_iterator *, block_stmt_iterator *);
extern void bsi_move_after (block_stmt_iterator *, block_stmt_iterator *);
extern void bsi_move_to_bb_end (block_stmt_iterator *, basic_block);
extern void bsi_replace (const block_stmt_iterator *, tree, bool);
/*---------------------------------------------------------------------------
+ OpenMP Region Tree
+---------------------------------------------------------------------------*/
+
+/* Parallel region information. Every parallel and workshare
+ directive is enclosed between two markers, the OMP_* directive
+ and a corresponding OMP_RETURN statement. */
+
+struct omp_region
+{
+ /* The enclosing region. */
+ struct omp_region *outer;
+
+ /* First child region. */
+ struct omp_region *inner;
+
+ /* Next peer region. */
+ struct omp_region *next;
+
+ /* Block containing the omp directive as its last stmt. */
+ basic_block entry;
+
+ /* Block containing the OMP_RETURN as its last stmt. */
+ basic_block exit;
+
+ /* Block containing the OMP_CONTINUE as its last stmt. */
+ basic_block cont;
+
+ /* If this is a combined parallel+workshare region, this is a list
+ of additional arguments needed by the combined parallel+workshare
+ library call. */
+ tree ws_args;
+
+ /* The code for the omp directive of this region. */
+ enum tree_code type;
+
+ /* Schedule kind, only used for OMP_FOR type regions. */
+ enum omp_clause_schedule_kind sched_kind;
+
+ /* True if this is a combined parallel+workshare region. */
+ bool is_combined_parallel;
+};
+
+extern struct omp_region *root_omp_region;
+extern struct omp_region *new_omp_region (basic_block, enum tree_code,
+ struct omp_region *);
+extern void free_omp_regions (void);
+
+/*---------------------------------------------------------------------------
Function prototypes
---------------------------------------------------------------------------*/
/* In tree-cfg.c */
extern bool is_ctrl_altering_stmt (tree);
extern bool computed_goto_p (tree);
extern bool simple_goto_p (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 basic_block debug_tree_bb_n (int);
extern void replace_uses_by (tree, tree);
extern void start_recording_case_labels (void);
extern void end_recording_case_labels (void);
+extern basic_block move_sese_region_to_fn (struct function *, basic_block,
+ basic_block);
/* In tree-cfgcleanup.c */
extern bool cleanup_tree_cfg (void);
/* In tree-dfa.c */
extern var_ann_t create_var_ann (tree);
+extern function_ann_t create_function_ann (tree);
extern stmt_ann_t create_stmt_ann (tree);
extern tree_ann_t create_tree_ann (tree);
-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 tree phi_reverse (tree);
extern void dump_dfa_stats (FILE *);
extern void debug_dfa_stats (void);
extern void debug_referenced_vars (void);
extern void dump_subvars_for (FILE *, tree);
extern void debug_subvars_for (tree);
extern tree get_virtual_var (tree);
-extern void add_referenced_tmp_var (tree);
+extern void add_referenced_var (tree);
extern void mark_new_vars_to_rename (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);
+
+/* 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 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 block);
+extern bool block_may_fallthru (tree);
/* In tree-ssa-alias.c */
extern void dump_may_aliases_for (FILE *, 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 add_type_alias (tree, tree);
-extern void new_type_alias (tree, tree);
+extern void new_type_alias (tree, tree, tree);
extern void count_uses_and_derefs (tree, tree, unsigned *, unsigned *, bool *);
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 ref_contains_indirect_ref (tree);
-extern tree okay_component_ref_for_subvars (tree, unsigned HOST_WIDE_INT *,
- unsigned HOST_WIDE_INT *);
+static inline bool array_ref_contains_indirect_ref (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 overlap_subvar (unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT,
- subvar_t, bool *);
+ tree, bool *);
/* Call-back function for walk_use_def_chains(). At each reaching
definition, a function with this prototype is called. */
extern bool may_propagate_copy (tree, tree);
extern bool may_propagate_copy_into_asm (tree);
+/* Affine iv. */
+
+typedef struct
+{
+ /* Iv = BASE + STEP * i. */
+ tree base, step;
+
+ /* True if this iv does not overflow. */
+ bool no_overflow;
+} affine_iv;
+
/* Description of number of iterations of a loop. All the expressions inside
the structure can be evaluated at the end of the loop's preheader
(and due to ssa form, also anywhere inside the body of the loop). */
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. */
+
+ /* The simplified shape of the exit condition. The loop exits if
+ CONTROL CMP BOUND is false, where CMP is one of NE_EXPR,
+ LT_EXPR, or GT_EXPR, and step of CONTROL is positive if CMP is
+ LE_EXPR and negative if CMP is GE_EXPR. This information is used
+ by loop unrolling. */
+ affine_iv control;
+ tree bound;
+ enum tree_code cmp;
};
/* In tree-vectorizer.c */
void vectorize_loops (struct loops *);
+extern bool vect_can_force_dr_alignment_p (tree, unsigned int);
+extern tree get_vectype_for_scalar_type (tree);
/* In tree-ssa-phiopt.c */
bool empty_block_p (basic_block);
/* In tree-ssa-loop*.c */
void tree_ssa_lim (struct loops *);
-void tree_ssa_unswitch_loops (struct loops *);
-void canonicalize_induction_variables (struct loops *);
-void tree_unroll_loops_completely (struct loops *, bool);
-void remove_empty_loops (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 *);
bool number_of_iterations_exit (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 *);
-bool scev_probably_wraps_p (tree, tree, tree, tree, struct loop *, bool *,
- bool *);
-tree convert_step (struct loop *, tree, tree, tree, tree);
+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);
+
void free_numbers_of_iterations_estimates (struct loops *);
void free_numbers_of_iterations_estimates_loop (struct loop *);
void rewrite_into_loop_closed_ssa (bitmap, unsigned);
void create_iv (tree, tree, tree, struct loop *, block_stmt_iterator *, bool,
tree *, tree *);
void split_loop_exit_edge (edge);
-void compute_phi_arg_on_exit (edge, tree, tree);
unsigned force_expr_to_var_cost (tree);
basic_block bsi_insert_on_edge_immediate_loop (edge, tree);
void standard_iv_increment_position (struct loop *, block_stmt_iterator *,
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,
+ edge, struct tree_niter_desc *);
+bool contains_abnormal_ssa_name_p (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));
/* In tree-ssa-loop-im.c */
/* The possibilities of statement 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. */
+ };
+
/* In tree-flow-inline.h */
static inline bool is_call_clobbered (tree);
-static inline void mark_call_clobbered (tree);
+static inline void mark_call_clobbered (tree, unsigned int);
static inline void set_is_used (tree);
static inline bool unmodifiable_var_p (tree);
/* In tree-vn.c */
bool expressions_equal_p (tree, tree);
tree get_value_handle (tree);
-hashval_t vn_compute (tree, hashval_t, tree);
+hashval_t vn_compute (tree, hashval_t);
+void sort_vuses (VEC (tree, gc) *);
tree vn_lookup_or_add (tree, tree);
-void vn_add (tree, 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_vuses (tree, VEC (tree, gc) *);
void vn_init (void);
void vn_delete (void);
unsigned multiply_by_cost (HOST_WIDE_INT, enum machine_mode);
/* In tree-ssa-threadupdate.c. */
-extern bool thread_through_all_blocks (bitmap);
+extern bool thread_through_all_blocks (void);
+extern void register_jump_thread (edge, edge);
/* In gimplify.c */
tree force_gimple_operand (tree, tree *, bool, tree);
/* In tree-ssa-structalias.c */
bool find_what_p_points_to (tree);
+/* In tree-ssa-live.c */
+extern void remove_unused_locals (void);
+
/* In tree-ssa-address.c */
/* Affine combination of trees. We keep track of at most MAX_AFF_ELTS elements
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
struct fieldoff
{
- tree field;
+ tree type;
+ tree size;
+ tree decl;
HOST_WIDE_INT offset;
};
typedef struct fieldoff fieldoff_s;
HOST_WIDE_INT, bool *);
void sort_fieldstack (VEC(fieldoff_s,heap) *);
+void init_alias_heapvars (void);
+void delete_alias_heapvars (void);
+
#include "tree-flow-inline.h"
+void swap_tree_operands (tree, tree *, tree *);
+
+extern void recalculate_used_alone (void);
+extern bool updating_used_alone;
#endif /* _TREE_FLOW_H */
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