#endif
/*---------------------------------------------------------------------------
+ Attributes for SSA_NAMEs.
+
+ NOTE: These structures are stored in struct tree_ssa_name
+ but are only used by the tree optimizers, so it makes better sense
+ to declare them here to avoid recompiling unrelated files when
+ making changes.
+---------------------------------------------------------------------------*/
+
+/* Aliasing information for SSA_NAMEs representing pointer variables. */
+struct ptr_info_def GTY(())
+{
+ /* Nonzero if points-to analysis couldn't determine where this pointer
+ is pointing to. */
+ unsigned int pt_anything : 1;
+
+ /* Nonzero if this pointer is the result of a call to malloc. */
+ unsigned int pt_malloc : 1;
+
+ /* Nonzero if the value of this pointer escapes the current function. */
+ unsigned int value_escapes_p : 1;
+
+ /* Nonzero if this pointer is dereferenced. */
+ unsigned int is_dereferenced : 1;
+
+ /* Set of variables that this pointer may point to. */
+ bitmap pt_vars;
+
+ /* If this pointer has been dereferenced, and points-to information is
+ more precise than type-based aliasing, indirect references to this
+ pointer will be represented by this memory tag, instead of the type
+ tag computed by TBAA. */
+ tree name_mem_tag;
+};
+
+
+/*---------------------------------------------------------------------------
Tree annotations stored in tree_common.ann
---------------------------------------------------------------------------*/
enum tree_ann_type { TREE_ANN_COMMON, VAR_ANN, STMT_ANN };
/* Annotation type. */
enum tree_ann_type type;
+ /* Auxiliary info specific to a pass. At all times, this
+ should either point to valid data or be NULL. */
+ PTR GTY ((skip (""))) aux;
+
/* The value handle for this expression. Used by GVN-PRE. */
tree GTY((skip)) value_handle;
};
{
struct tree_ann_common_d common;
- /* Nonzero if this variable has uses which may not appear
- in the IL. This can happen in the following cases:
-
- 1. If the variable is used in a variable length
- array declaration.
-
- 2. If the variable is the return value in a C++
- function where the named return value optimization
- has been performed. */
- unsigned has_hidden_use : 1;
-
/* Used by the out of SSA pass to determine whether this variable has
been seen yet or not. */
unsigned out_of_ssa_tag : 1;
static inline int num_immediate_uses (dataflow_t);
static inline tree immediate_use (dataflow_t, int);
static inline dataflow_t get_immediate_uses (tree);
-static inline bool has_hidden_use (tree);
-static inline void set_has_hidden_use (tree);
static inline void set_default_def (tree, tree);
static inline tree default_def (tree);
static inline bool may_be_aliased (tree);
/* Chain of PHI nodes for this block. */
tree phi_nodes;
- /* Chain of EPHI nodes created in this block. */
- tree ephi_nodes;
-
/* Number of predecessors for this block. This is only valid during
SSA rewriting. It is not maintained after conversion into SSA form. */
int num_preds;
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;
extern void debug_cfg_stats (void);
extern void debug_loop_ir (void);
extern void print_loop_ir (FILE *);
+extern void cleanup_dead_labels (void);
+extern void group_case_labels (void);
extern void cleanup_tree_cfg (void);
extern tree first_stmt (basic_block);
extern tree last_stmt (basic_block);
extern void verify_stmts (void);
extern tree tree_block_label (basic_block bb);
extern void extract_true_false_edges_from_block (basic_block, edge *, edge *);
+extern bool tree_purge_dead_eh_edges (basic_block);
+extern bool tree_purge_all_dead_eh_edges (bitmap);
/* In tree-pretty-print.c. */
extern void dump_generic_bb (FILE *, basic_block, int, int);
extern void debug_alias_info (void);
extern void dump_points_to_info (FILE *);
extern void debug_points_to_info (void);
+extern void dump_points_to_info_for (FILE *, tree);
+extern void debug_points_to_info_for (tree);
/* Call-back function for walk_use_def_chains(). At each reaching
definition, a function with this prototype is called. */
extern void delete_tree_ssa (void);
extern void register_new_def (tree, varray_type *);
extern void walk_use_def_chains (tree, walk_use_def_chains_fn, void *);
+extern void kill_redundant_phi_nodes (void);
/* In tree-into-ssa.c */
-extern void rewrite_into_ssa (void);
+extern void rewrite_into_ssa (bool);
+extern void rewrite_ssa_into_ssa (bitmap);
+
+void compute_global_livein (bitmap, bitmap);
+tree duplicate_ssa_name (tree, tree);
/* In tree-ssa-ccp.c */
bool fold_stmt (tree *);
extern void propagate_value (use_operand_p, tree);
extern void propagate_tree_value (tree *, tree);
extern void replace_exp (use_operand_p, tree);
-extern bool cprop_into_stmt (tree, varray_type);
-extern void cprop_into_successor_phis (basic_block, varray_type, bitmap);
+extern bool may_propagate_copy (tree, tree);
+
+/* 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). */
+
+struct tree_niter_desc
+{
+ tree assumptions; /* The boolean expression. If this expression evalutes
+ to false, then the other fields in this structure
+ should not be used; there is no guarantee that they
+ will be correct. */
+ tree may_be_zero; /* The booleand expression. If it evaluates to true,
+ the loop will exit in the first iteration (i.e.
+ its latch will not be executed), even if the niter
+ field says otherwise. */
+ tree niter; /* The expression giving the number of iterations of
+ 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. */
+};
+
+/* In tree-ssa-loop*.c */
+
+void tree_ssa_lim (struct loops *);
+
+void number_of_iterations_cond (tree, tree, tree, enum tree_code, tree, tree,
+ struct tree_niter_desc *);
+bool number_of_iterations_exit (struct loop *, edge,
+ struct tree_niter_desc *niter);
+tree loop_niter_by_eval (struct loop *, edge);
+tree find_loop_niter_by_eval (struct loop *, edge *);
+void estimate_numbers_of_iterations (struct loops *);
+tree can_count_iv_in_wider_type (struct loop *, tree, tree, tree, tree);
+void free_numbers_of_iterations_estimates (struct loops *);
+void loop_commit_inserts (void);
+bool for_each_index (tree *, bool (*) (tree, tree *, void *), void *);
/* In tree-flow-inline.h */
static inline int phi_arg_from_edge (tree, edge);
-static inline bool may_propagate_copy (tree, tree);
static inline bool is_call_clobbered (tree);
static inline void mark_call_clobbered (tree);
extern bool tree_could_throw_p (tree);
extern bool tree_can_throw_internal (tree);
extern bool tree_can_throw_external (tree);
+extern int lookup_stmt_eh_region (tree);
extern void add_stmt_to_eh_region (tree, int);
+extern bool remove_stmt_from_eh_region (tree);
+extern bool maybe_clean_eh_stmt (tree);
/* In tree-ssa-pre.c */
void add_to_value (tree, tree);
/* In tree-vn.c */
-bool expressions_equal_p (tree e1, tree e2);
+bool expressions_equal_p (tree, tree);
tree get_value_handle (tree);
-hashval_t vn_compute (tree, hashval_t);
-tree vn_lookup_or_add (tree);
-void vn_add (tree, tree);
-tree vn_lookup (tree);
+hashval_t vn_compute (tree, hashval_t, vuse_optype);
+tree vn_lookup_or_add (tree, vuse_optype);
+void vn_add (tree, tree, vuse_optype);
+tree vn_lookup (tree, vuse_optype);
void vn_init (void);
void vn_delete (void);
OSDN Git Service
