/* Vectorizer
- Copyright (C) 2003-2013 Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
Contributed by Dorit Naishlos <dorit@il.ibm.com>
This file is part of GCC.
values unknown at compile time. */
int min_profitable_iters;
+ /* Threshold of number of iterations below which vectorzation will not be
+ performed. It is calculated from MIN_PROFITABLE_ITERS and
+ PARAM_MIN_VECT_LOOP_BOUND. */
+ unsigned int th;
+
/* Is the loop vectorizable? */
bool vectorizable;
vec<gimple> reduction_chains;
/* Hash table used to choose the best peeling option. */
- hash_table <peel_info_hasher> peeling_htab;
+ hash_table<peel_info_hasher> *peeling_htab;
/* Cost data used by the target cost model. */
void *target_cost_data;
fix it up. */
bool operands_swapped;
+ /* True if there are no loop carried data dependencies in the loop.
+ If loop->safelen <= 1, then this is always true, either the loop
+ didn't have any loop carried data dependencies, or the loop is being
+ vectorized guarded with some runtime alias checks, or couldn't
+ be vectorized at all, but then this field shouldn't be used.
+ For loop->safelen >= 2, the user has asserted that there are no
+ backward dependencies, but there still could be loop carried forward
+ dependencies in such loops. This flag will be false if normal
+ vectorizer data dependency analysis would fail or require versioning
+ for alias, but because of loop->safelen >= 2 it has been vectorized
+ even without versioning for alias. E.g. in:
+ #pragma omp simd
+ for (int i = 0; i < m; i++)
+ a[i] = a[i + k] * c;
+ (or #pragma simd or #pragma ivdep) we can vectorize this and it will
+ DTRT even for k > 0 && k < m, but without safelen we would not
+ vectorize this, so this field would be false. */
+ bool no_data_dependencies;
+
+ /* If if-conversion versioned this loop before conversion, this is the
+ loop version without if-conversion. */
+ struct loop *scalar_loop;
+
} *loop_vec_info;
/* Access Functions. */
cost model. */
#define LOOP_VINFO_NITERS_UNCHANGED(L) (L)->num_iters_unchanged
#define LOOP_VINFO_COST_MODEL_MIN_ITERS(L) (L)->min_profitable_iters
+#define LOOP_VINFO_COST_MODEL_THRESHOLD(L) (L)->th
#define LOOP_VINFO_VECTORIZABLE_P(L) (L)->vectorizable
#define LOOP_VINFO_VECT_FACTOR(L) (L)->vectorization_factor
#define LOOP_VINFO_PTR_MASK(L) (L)->ptr_mask
#define LOOP_VINFO_PEELING_FOR_GAPS(L) (L)->peeling_for_gaps
#define LOOP_VINFO_OPERANDS_SWAPPED(L) (L)->operands_swapped
#define LOOP_VINFO_PEELING_FOR_NITER(L) (L)->peeling_for_niter
+#define LOOP_VINFO_NO_DATA_DEPENDENCIES(L) (L)->no_data_dependencies
+#define LOOP_VINFO_SCALAR_LOOP(L) (L)->scalar_loop
#define LOOP_REQUIRES_VERSIONING_FOR_ALIGNMENT(L) \
- (L)->may_misalign_stmts.length () > 0
+ ((L)->may_misalign_stmts.length () > 0)
#define LOOP_REQUIRES_VERSIONING_FOR_ALIAS(L) \
- (L)->may_alias_ddrs.length () > 0
+ ((L)->may_alias_ddrs.length () > 0)
#define LOOP_VINFO_NITERS_KNOWN_P(L) \
(tree_fits_shwi_p ((L)->num_iters) && tree_to_shwi ((L)->num_iters) > 0)
is 1. */
unsigned int gap;
+ /* The minimum negative dependence distance this stmt participates in
+ or zero if none. */
+ unsigned int min_neg_dist;
+
/* Not all stmts in the loop need to be vectorized. e.g, the increment
of the loop induction variable and computation of array indexes. relevant
indicates whether the stmt needs to be vectorized. */
#define STMT_VINFO_GROUP_SAME_DR_STMT(S) (S)->same_dr_stmt
#define STMT_VINFO_GROUPED_ACCESS(S) ((S)->first_element != NULL && (S)->data_ref_info)
#define STMT_VINFO_LOOP_PHI_EVOLUTION_PART(S) (S)->loop_phi_evolution_part
+#define STMT_VINFO_MIN_NEG_DIST(S) (S)->min_neg_dist
#define GROUP_FIRST_ELEMENT(S) (S)->first_element
#define GROUP_NEXT_ELEMENT(S) (S)->next_element
conversion. */
#define MAX_INTERM_CVT_STEPS 3
-/* The maximum vectorization factor supported by any target (V32QI). */
-#define MAX_VECTORIZATION_FACTOR 32
+/* The maximum vectorization factor supported by any target (V64QI). */
+#define MAX_VECTORIZATION_FACTOR 64
/* Avoid GTY(()) on stmt_vec_info. */
typedef void *vec_void_p;
static inline bool
unlimited_cost_model (loop_p loop)
{
- if (loop != NULL && loop->force_vect
+ if (loop != NULL && loop->force_vectorize
&& flag_simd_cost_model != VECT_COST_MODEL_DEFAULT)
return flag_simd_cost_model == VECT_COST_MODEL_UNLIMITED;
return (flag_vect_cost_model == VECT_COST_MODEL_UNLIMITED);
in tree-vect-loop-manip.c. */
extern void slpeel_make_loop_iterate_ntimes (struct loop *, tree);
extern bool slpeel_can_duplicate_loop_p (const struct loop *, const_edge);
-struct loop *slpeel_tree_duplicate_loop_to_edge_cfg (struct loop *, edge);
+struct loop *slpeel_tree_duplicate_loop_to_edge_cfg (struct loop *,
+ struct loop *, edge);
extern void vect_loop_versioning (loop_vec_info, unsigned int, bool);
extern void vect_do_peeling_for_loop_bound (loop_vec_info, tree, tree,
unsigned int, bool);
extern bool vect_supportable_shift (enum tree_code, tree);
extern void vect_get_vec_defs (tree, tree, gimple, vec<tree> *,
vec<tree> *, slp_tree, int);
-extern tree vect_gen_perm_mask (tree, unsigned char *);
+extern tree vect_gen_perm_mask_any (tree, const unsigned char *);
+extern tree vect_gen_perm_mask_checked (tree, const unsigned char *);
/* In tree-vect-data-refs.c. */
extern bool vect_can_force_dr_alignment_p (const_tree, unsigned int);
extern bool vect_prune_runtime_alias_test_list (loop_vec_info);
extern tree vect_check_gather (gimple, loop_vec_info, tree *, tree *,
int *);
-extern bool vect_analyze_data_refs (loop_vec_info, bb_vec_info, int *);
+extern bool vect_analyze_data_refs (loop_vec_info, bb_vec_info, int *,
+ unsigned *);
extern tree vect_create_data_ref_ptr (gimple, tree, struct loop *, tree,
tree *, gimple_stmt_iterator *,
- gimple *, bool, bool *);
+ gimple *, bool, bool *,
+ tree = NULL_TREE);
extern tree bump_vector_ptr (tree, gimple, gimple_stmt_iterator *, gimple, tree);
extern tree vect_create_destination_var (tree, tree);
extern bool vect_grouped_store_supported (tree, unsigned HOST_WIDE_INT);
extern void vect_record_grouped_load_vectors (gimple, vec<tree> );
extern tree vect_get_new_vect_var (tree, enum vect_var_kind, const char *);
extern tree vect_create_addr_base_for_vector_ref (gimple, gimple_seq *,
- tree, struct loop *);
+ tree, struct loop *,
+ tree = NULL_TREE);
/* In tree-vect-loop.c. */
/* FORNOW: Used in tree-parloops.c. */
slp_instance, bool);
extern bool vect_schedule_slp (loop_vec_info, bb_vec_info);
extern void vect_update_slp_costs_according_to_vf (loop_vec_info);
-extern bool vect_analyze_slp (loop_vec_info, bb_vec_info);
+extern bool vect_analyze_slp (loop_vec_info, bb_vec_info, unsigned);
extern bool vect_make_slp_decision (loop_vec_info);
extern void vect_detect_hybrid_slp (loop_vec_info);
extern void vect_get_slp_defs (vec<tree> , slp_tree,
Additional pattern recognition functions can (and will) be added
in the future. */
typedef gimple (* vect_recog_func_ptr) (vec<gimple> *, tree *, tree *);
-#define NUM_PATTERNS 11
+#define NUM_PATTERNS 12
void vect_pattern_recog (loop_vec_info, bb_vec_info);
/* In tree-vectorizer.c. */
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