Line data Source code
1 : /* Vectorizer
2 : Copyright (C) 2003-2026 Free Software Foundation, Inc.
3 : Contributed by Dorit Naishlos <dorit@il.ibm.com>
4 :
5 : This file is part of GCC.
6 :
7 : GCC is free software; you can redistribute it and/or modify it under
8 : the terms of the GNU General Public License as published by the Free
9 : Software Foundation; either version 3, or (at your option) any later
10 : version.
11 :
12 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 : for more details.
16 :
17 : You should have received a copy of the GNU General Public License
18 : along with GCC; see the file COPYING3. If not see
19 : <http://www.gnu.org/licenses/>. */
20 :
21 : #ifndef GCC_TREE_VECTORIZER_H
22 : #define GCC_TREE_VECTORIZER_H
23 :
24 : typedef class _stmt_vec_info *stmt_vec_info;
25 : typedef struct _slp_tree *slp_tree;
26 :
27 : #include "tree-data-ref.h"
28 : #include "tree-hash-traits.h"
29 : #include "target.h"
30 : #include "internal-fn.h"
31 : #include "tree-ssa-operands.h"
32 : #include "gimple-match.h"
33 : #include "dominance.h"
34 :
35 : /* Used for naming of new temporaries. */
36 : enum vect_var_kind {
37 : vect_simple_var,
38 : vect_pointer_var,
39 : vect_scalar_var,
40 : vect_mask_var
41 : };
42 :
43 : /* Defines type of operation. */
44 : enum operation_type {
45 : unary_op = 1,
46 : binary_op,
47 : ternary_op
48 : };
49 :
50 : /* Define type of available alignment support. */
51 : enum dr_alignment_support {
52 : dr_unaligned_unsupported,
53 : dr_unaligned_supported,
54 : dr_explicit_realign,
55 : dr_explicit_realign_optimized,
56 : dr_aligned
57 : };
58 :
59 : /* Define type of peeling support to indicate how peeling for alignment can help
60 : make vectorization supported. */
61 : enum peeling_support {
62 : peeling_known_supported,
63 : peeling_maybe_supported,
64 : peeling_unsupported
65 : };
66 :
67 : /* Define type of def-use cross-iteration cycle. */
68 : enum vect_def_type {
69 : vect_uninitialized_def = 0,
70 : vect_constant_def = 1,
71 : vect_external_def,
72 : vect_internal_def,
73 : vect_induction_def,
74 : vect_reduction_def,
75 : vect_double_reduction_def,
76 : vect_nested_cycle,
77 : vect_first_order_recurrence,
78 : vect_condition_def,
79 : vect_unknown_def_type
80 : };
81 :
82 : /* Define operation type of linear/non-linear induction variable. */
83 : enum vect_induction_op_type {
84 : vect_step_op_add = 0,
85 : vect_step_op_neg,
86 : vect_step_op_mul,
87 : vect_step_op_shl,
88 : vect_step_op_shr
89 : };
90 :
91 : /* Define type of reduction. */
92 : enum vect_reduction_type {
93 : TREE_CODE_REDUCTION,
94 : COND_REDUCTION,
95 : INTEGER_INDUC_COND_REDUCTION,
96 : CONST_COND_REDUCTION,
97 :
98 : /* Retain a scalar phi and use a FOLD_EXTRACT_LAST within the loop
99 : to implement:
100 :
101 : for (int i = 0; i < VF; ++i)
102 : res = cond[i] ? val[i] : res; */
103 : EXTRACT_LAST_REDUCTION,
104 :
105 : /* Use a folding reduction within the loop to implement:
106 :
107 : for (int i = 0; i < VF; ++i)
108 : res = res OP val[i];
109 :
110 : (with no reassocation). */
111 : FOLD_LEFT_REDUCTION
112 : };
113 :
114 : #define VECTORIZABLE_CYCLE_DEF(D) (((D) == vect_reduction_def) \
115 : || ((D) == vect_double_reduction_def) \
116 : || ((D) == vect_nested_cycle))
117 :
118 : /* Structure to encapsulate information about a group of like
119 : instructions to be presented to the target cost model. */
120 : struct stmt_info_for_cost {
121 : int count;
122 : enum vect_cost_for_stmt kind;
123 : enum vect_cost_model_location where;
124 : stmt_vec_info stmt_info;
125 : slp_tree node;
126 : tree vectype;
127 : int misalign;
128 : };
129 :
130 : typedef vec<stmt_info_for_cost> stmt_vector_for_cost;
131 :
132 : /* Maps base addresses to an innermost_loop_behavior and the stmt it was
133 : derived from that gives the maximum known alignment for that base. */
134 : typedef hash_map<tree_operand_hash,
135 : std::pair<stmt_vec_info, innermost_loop_behavior *> >
136 : vec_base_alignments;
137 :
138 : /* Represents elements [START, START + LENGTH) of cyclical array OPS*
139 : (i.e. OPS repeated to give at least START + LENGTH elements) */
140 : struct vect_scalar_ops_slice
141 : {
142 : tree op (unsigned int i) const;
143 : bool all_same_p () const;
144 :
145 : vec<tree> *ops;
146 : unsigned int start;
147 : unsigned int length;
148 : };
149 :
150 : /* Return element I of the slice. */
151 : inline tree
152 2711904 : vect_scalar_ops_slice::op (unsigned int i) const
153 : {
154 5423808 : return (*ops)[(i + start) % ops->length ()];
155 : }
156 :
157 : /* Hash traits for vect_scalar_ops_slice. */
158 : struct vect_scalar_ops_slice_hash : typed_noop_remove<vect_scalar_ops_slice>
159 : {
160 : typedef vect_scalar_ops_slice value_type;
161 : typedef vect_scalar_ops_slice compare_type;
162 :
163 : static const bool empty_zero_p = true;
164 :
165 : static void mark_deleted (value_type &s) { s.length = ~0U; }
166 0 : static void mark_empty (value_type &s) { s.length = 0; }
167 426092 : static bool is_deleted (const value_type &s) { return s.length == ~0U; }
168 4018329 : static bool is_empty (const value_type &s) { return s.length == 0; }
169 : static hashval_t hash (const value_type &);
170 : static bool equal (const value_type &, const compare_type &);
171 : };
172 :
173 : /* Describes how we're going to vectorize an individual load or store,
174 : or a group of loads or stores. */
175 : enum vect_memory_access_type {
176 : VMAT_UNINITIALIZED,
177 :
178 : /* An access to an invariant address. This is used only for loads. */
179 : VMAT_INVARIANT,
180 :
181 : /* A simple contiguous access. */
182 : VMAT_CONTIGUOUS,
183 :
184 : /* A contiguous access that goes down in memory rather than up,
185 : with no additional permutation. This is used only for stores
186 : of invariants. */
187 : VMAT_CONTIGUOUS_DOWN,
188 :
189 : /* A simple contiguous access in which the elements need to be reversed
190 : after loading or before storing. */
191 : VMAT_CONTIGUOUS_REVERSE,
192 :
193 : /* An access that uses IFN_LOAD_LANES or IFN_STORE_LANES. */
194 : VMAT_LOAD_STORE_LANES,
195 :
196 : /* An access in which each scalar element is loaded or stored
197 : individually. */
198 : VMAT_ELEMENTWISE,
199 :
200 : /* A hybrid of VMAT_CONTIGUOUS and VMAT_ELEMENTWISE, used for grouped
201 : SLP accesses. Each unrolled iteration uses a contiguous load
202 : or store for the whole group, but the groups from separate iterations
203 : are combined in the same way as for VMAT_ELEMENTWISE. */
204 : VMAT_STRIDED_SLP,
205 :
206 : /* The access uses gather loads or scatter stores. */
207 : VMAT_GATHER_SCATTER_LEGACY,
208 : VMAT_GATHER_SCATTER_IFN,
209 : VMAT_GATHER_SCATTER_EMULATED
210 : };
211 :
212 : /* Returns whether MAT is any of the VMAT_GATHER_SCATTER_* kinds. */
213 :
214 : inline bool
215 6344942 : mat_gather_scatter_p (vect_memory_access_type mat)
216 : {
217 6344942 : return (mat == VMAT_GATHER_SCATTER_LEGACY
218 : || mat == VMAT_GATHER_SCATTER_IFN
219 6344942 : || mat == VMAT_GATHER_SCATTER_EMULATED);
220 : }
221 :
222 : /*-----------------------------------------------------------------*/
223 : /* Info on vectorized defs. */
224 : /*-----------------------------------------------------------------*/
225 : enum stmt_vec_info_type {
226 : undef_vec_info_type = 0,
227 : load_vec_info_type,
228 : store_vec_info_type,
229 : shift_vec_info_type,
230 : op_vec_info_type,
231 : call_vec_info_type,
232 : call_simd_clone_vec_info_type,
233 : assignment_vec_info_type,
234 : condition_vec_info_type,
235 : comparison_vec_info_type,
236 : reduc_vec_info_type,
237 : induc_vec_info_type,
238 : type_promotion_vec_info_type,
239 : type_demotion_vec_info_type,
240 : type_conversion_vec_info_type,
241 : cycle_phi_info_type,
242 : lc_phi_info_type,
243 : phi_info_type,
244 : recurr_info_type,
245 : loop_exit_ctrl_vec_info_type,
246 : permute_info_type
247 : };
248 :
249 : /************************************************************************
250 : SLP
251 : ************************************************************************/
252 : typedef vec<std::pair<unsigned, unsigned> > lane_permutation_t;
253 : typedef auto_vec<std::pair<unsigned, unsigned>, 16> auto_lane_permutation_t;
254 : typedef vec<unsigned> load_permutation_t;
255 : typedef auto_vec<unsigned, 16> auto_load_permutation_t;
256 :
257 3311228 : struct vect_data {
258 2062446 : virtual ~vect_data () = default;
259 : };
260 :
261 : /* Analysis data from vectorizable_simd_clone_call for
262 : call_simd_clone_vec_info_type. */
263 : struct vect_simd_clone_data : vect_data {
264 1903 : virtual ~vect_simd_clone_data () = default;
265 1436 : vect_simd_clone_data () = default;
266 467 : vect_simd_clone_data (vect_simd_clone_data &&other) = default;
267 :
268 : /* Selected SIMD clone and clone for in-branch. */
269 : cgraph_node *clone;
270 : cgraph_node *clone_inbranch;
271 :
272 : /* Selected SIMD clone's function info. First vector element
273 : is NULL_TREE, followed by a pair of trees (base + step)
274 : for linear arguments (pair of NULLs for other arguments). */
275 : auto_vec<tree> simd_clone_info;
276 : };
277 :
278 : /* Analysis data from vectorizable_load and vectorizable_store for
279 : load_vec_info_type and store_vec_info_type. */
280 : struct vect_load_store_data : vect_data {
281 1246879 : vect_load_store_data (vect_load_store_data &&other) = default;
282 2062446 : vect_load_store_data () = default;
283 3308684 : virtual ~vect_load_store_data () = default;
284 :
285 : vect_memory_access_type memory_access_type;
286 : dr_alignment_support alignment_support_scheme;
287 : int misalignment;
288 : internal_fn lanes_ifn; // VMAT_LOAD_STORE_LANES
289 : poly_int64 poffset;
290 : union {
291 : internal_fn ifn; // VMAT_GATHER_SCATTER_IFN
292 : tree decl; // VMAT_GATHER_SCATTER_DECL
293 : } gs;
294 : tree strided_offset_vectype; // VMAT_GATHER_SCATTER_IFN, originally strided
295 : /* Load/store type with larger element mode used for punning the vectype. */
296 : tree ls_type; // VMAT_GATHER_SCATTER_IFN
297 : /* This is set to a supported offset vector type if we don't support the
298 : originally requested offset type, otherwise NULL.
299 : If nonzero there will be an additional offset conversion before
300 : the gather/scatter. */
301 : tree supported_offset_vectype; // VMAT_GATHER_SCATTER_IFN
302 : /* Similar for scale. Only nonzero if we don't support the requested
303 : scale. Then we need to multiply the offset vector before the
304 : gather/scatter. */
305 : int supported_scale; // VMAT_GATHER_SCATTER_IFN
306 : auto_vec<int> elsvals;
307 : /* True if the load requires a load permutation. */
308 : bool slp_perm; // SLP_TREE_LOAD_PERMUTATION
309 : unsigned n_perms; // SLP_TREE_LOAD_PERMUTATION
310 : unsigned n_loads; // SLP_TREE_LOAD_PERMUTATION
311 : /* Whether the load permutation is consecutive and simple. */
312 : bool subchain_p; // VMAT_STRIDED_SLP and VMAT_GATHER_SCATTER
313 : };
314 :
315 : /* A computation tree of an SLP instance. Each node corresponds to a group of
316 : stmts to be packed in a SIMD stmt. */
317 : struct _slp_tree {
318 : _slp_tree ();
319 : ~_slp_tree ();
320 :
321 : void push_vec_def (gimple *def);
322 8465 : void push_vec_def (tree def) { vec_defs.quick_push (def); }
323 :
324 : /* Nodes that contain def-stmts of this node statements operands. */
325 : vec<slp_tree> children;
326 :
327 : /* A group of scalar stmts to be vectorized together. */
328 : vec<stmt_vec_info> stmts;
329 : /* A group of scalar operands to be vectorized together. */
330 : vec<tree> ops;
331 : /* A set of lane indices that are live and to be code-generated from
332 : this SLP node. */
333 : vec<unsigned> live_lanes;
334 :
335 : /* The representative that should be used for analysis and
336 : code generation. */
337 : stmt_vec_info representative;
338 :
339 : struct {
340 : /* SLP cycle the node resides in, or -1. */
341 : int id;
342 : /* The SLP operand index with the edge on the SLP cycle, or -1. */
343 : int reduc_idx;
344 : } cycle_info;
345 :
346 : /* Load permutation relative to the stores, NULL if there is no
347 : permutation. */
348 : load_permutation_t load_permutation;
349 : /* Lane permutation of the operands scalar lanes encoded as pairs
350 : of { operand number, lane number }. The number of elements
351 : denotes the number of output lanes. */
352 : lane_permutation_t lane_permutation;
353 :
354 : tree vectype;
355 : /* Vectorized defs. */
356 : vec<tree> vec_defs;
357 :
358 : /* Reference count in the SLP graph. */
359 : unsigned int refcnt;
360 : /* The maximum number of vector elements for the subtree rooted
361 : at this node. */
362 : poly_uint64 max_nunits;
363 : /* The DEF type of this node. */
364 : enum vect_def_type def_type;
365 : /* The number of scalar lanes produced by this node. */
366 : unsigned int lanes;
367 : /* The operation of this node. */
368 : enum tree_code code;
369 : /* For gather/scatter memory operations the scale each offset element
370 : should be multiplied by before being added to the base. */
371 : int gs_scale;
372 : /* For gather/scatter memory operations the loop-invariant base value. */
373 : tree gs_base;
374 : /* Whether uses of this load or feeders of this store are suitable
375 : for load/store-lanes. */
376 : bool ldst_lanes;
377 : /* For BB vect, flag to indicate this load node should be vectorized
378 : as to avoid STLF fails because of related stores. */
379 : bool avoid_stlf_fail;
380 :
381 : int vertex;
382 :
383 : /* The kind of operation as determined by analysis and optional
384 : kind specific data. */
385 : enum stmt_vec_info_type type;
386 : vect_data *data;
387 :
388 : template <class T>
389 2063882 : T& get_data (T& else_) { return data ? *static_cast <T *> (data) : else_; }
390 :
391 : /* If not NULL this is a cached failed SLP discovery attempt with
392 : the lanes that failed during SLP discovery as 'false'. This is
393 : a copy of the matches array. */
394 : bool *failed;
395 :
396 : /* Allocate from slp_tree_pool. */
397 : static void *operator new (size_t);
398 :
399 : /* Return memory to slp_tree_pool. */
400 : static void operator delete (void *, size_t);
401 :
402 : /* Linked list of nodes to release when we free the slp_tree_pool. */
403 : slp_tree next_node;
404 : slp_tree prev_node;
405 : };
406 :
407 : /* The enum describes the type of operations that an SLP instance
408 : can perform. */
409 :
410 : enum slp_instance_kind {
411 : slp_inst_kind_store,
412 : slp_inst_kind_reduc_group,
413 : slp_inst_kind_reduc_chain,
414 : slp_inst_kind_bb_reduc,
415 : slp_inst_kind_ctor,
416 : slp_inst_kind_gcond
417 : };
418 :
419 : /* SLP instance is a sequence of stmts in a loop that can be packed into
420 : SIMD stmts. */
421 : typedef class _slp_instance {
422 : public:
423 : /* The root of SLP tree. */
424 : slp_tree root;
425 :
426 : /* For vector constructors, the constructor stmt that the SLP tree is built
427 : from, NULL otherwise. */
428 : vec<stmt_vec_info> root_stmts;
429 :
430 : /* For slp_inst_kind_bb_reduc the defs that were not vectorized, NULL
431 : otherwise. */
432 : vec<tree> remain_defs;
433 :
434 : /* The group of nodes that contain loads of this SLP instance. */
435 : vec<slp_tree> loads;
436 :
437 : /* The SLP node containing the reduction PHIs. */
438 : slp_tree reduc_phis;
439 :
440 : /* Vector cost of this entry to the SLP graph. */
441 : stmt_vector_for_cost cost_vec;
442 :
443 : /* If this instance is the main entry of a subgraph the set of
444 : entries into the same subgraph, including itself. */
445 : vec<_slp_instance *> subgraph_entries;
446 :
447 : /* The type of operation the SLP instance is performing. */
448 : slp_instance_kind kind;
449 :
450 : dump_user_location_t location () const;
451 : } *slp_instance;
452 :
453 :
454 : /* Access Functions. */
455 : #define SLP_INSTANCE_TREE(S) (S)->root
456 : #define SLP_INSTANCE_LOADS(S) (S)->loads
457 : #define SLP_INSTANCE_ROOT_STMTS(S) (S)->root_stmts
458 : #define SLP_INSTANCE_REMAIN_DEFS(S) (S)->remain_defs
459 : #define SLP_INSTANCE_KIND(S) (S)->kind
460 :
461 : #define SLP_TREE_CHILDREN(S) (S)->children
462 : #define SLP_TREE_SCALAR_STMTS(S) (S)->stmts
463 : #define SLP_TREE_SCALAR_OPS(S) (S)->ops
464 : #define SLP_TREE_LIVE_LANES(S) (S)->live_lanes
465 : #define SLP_TREE_REF_COUNT(S) (S)->refcnt
466 : #define SLP_TREE_VEC_DEFS(S) (S)->vec_defs
467 : #define SLP_TREE_LOAD_PERMUTATION(S) (S)->load_permutation
468 : #define SLP_TREE_LANE_PERMUTATION(S) (S)->lane_permutation
469 : #define SLP_TREE_DEF_TYPE(S) (S)->def_type
470 : #define SLP_TREE_VECTYPE(S) (S)->vectype
471 : #define SLP_TREE_REPRESENTATIVE(S) (S)->representative
472 : #define SLP_TREE_LANES(S) (S)->lanes
473 : #define SLP_TREE_CODE(S) (S)->code
474 : #define SLP_TREE_TYPE(S) (S)->type
475 : #define SLP_TREE_GS_SCALE(S) (S)->gs_scale
476 : #define SLP_TREE_GS_BASE(S) (S)->gs_base
477 : #define SLP_TREE_REDUC_IDX(S) (S)->cycle_info.reduc_idx
478 : #define SLP_TREE_PERMUTE_P(S) ((S)->code == VEC_PERM_EXPR)
479 :
480 : inline vect_memory_access_type
481 1247793 : SLP_TREE_MEMORY_ACCESS_TYPE (slp_tree node)
482 : {
483 482764 : if (SLP_TREE_TYPE (node) == load_vec_info_type
484 425834 : || SLP_TREE_TYPE (node) == store_vec_info_type)
485 230208 : return static_cast<vect_load_store_data *> (node->data)->memory_access_type;
486 : return VMAT_UNINITIALIZED;
487 : }
488 :
489 : enum vect_partial_vector_style {
490 : vect_partial_vectors_none,
491 : vect_partial_vectors_while_ult,
492 : vect_partial_vectors_avx512,
493 : vect_partial_vectors_len
494 : };
495 :
496 : /* Key for map that records association between
497 : scalar conditions and corresponding loop mask, and
498 : is populated by vect_record_loop_mask. */
499 :
500 : struct scalar_cond_masked_key
501 : {
502 63264 : scalar_cond_masked_key (tree t, unsigned ncopies_)
503 63264 : : ncopies (ncopies_)
504 : {
505 63264 : get_cond_ops_from_tree (t);
506 : }
507 :
508 : void get_cond_ops_from_tree (tree);
509 :
510 : unsigned ncopies;
511 : bool inverted_p;
512 : tree_code code;
513 : tree op0;
514 : tree op1;
515 : };
516 :
517 : template<>
518 : struct default_hash_traits<scalar_cond_masked_key>
519 : {
520 : typedef scalar_cond_masked_key compare_type;
521 : typedef scalar_cond_masked_key value_type;
522 :
523 : static inline hashval_t
524 71851 : hash (value_type v)
525 : {
526 71851 : inchash::hash h;
527 71851 : h.add_int (v.code);
528 71851 : inchash::add_expr (v.op0, h, 0);
529 71851 : inchash::add_expr (v.op1, h, 0);
530 71851 : h.add_int (v.ncopies);
531 71851 : h.add_flag (v.inverted_p);
532 71851 : return h.end ();
533 : }
534 :
535 : static inline bool
536 10315 : equal (value_type existing, value_type candidate)
537 : {
538 10315 : return (existing.ncopies == candidate.ncopies
539 10099 : && existing.code == candidate.code
540 6517 : && existing.inverted_p == candidate.inverted_p
541 5044 : && operand_equal_p (existing.op0, candidate.op0, 0)
542 13449 : && operand_equal_p (existing.op1, candidate.op1, 0));
543 : }
544 :
545 : static const bool empty_zero_p = true;
546 :
547 : static inline void
548 0 : mark_empty (value_type &v)
549 : {
550 0 : v.ncopies = 0;
551 0 : v.inverted_p = false;
552 : }
553 :
554 : static inline bool
555 9117502 : is_empty (value_type v)
556 : {
557 9055411 : return v.ncopies == 0;
558 : }
559 :
560 : static inline void mark_deleted (value_type &) {}
561 :
562 : static inline bool is_deleted (const value_type &)
563 : {
564 : return false;
565 : }
566 :
567 54783 : static inline void remove (value_type &) {}
568 : };
569 :
570 : typedef hash_set<scalar_cond_masked_key> scalar_cond_masked_set_type;
571 :
572 : /* Key and map that records association between vector conditions and
573 : corresponding loop mask, and is populated by prepare_vec_mask. */
574 :
575 : typedef pair_hash<tree_operand_hash, tree_operand_hash> tree_cond_mask_hash;
576 : typedef hash_set<tree_cond_mask_hash> vec_cond_masked_set_type;
577 :
578 : /* Describes two objects whose addresses must be unequal for the vectorized
579 : loop to be valid. */
580 : typedef std::pair<tree, tree> vec_object_pair;
581 :
582 : /* Records that vectorization is only possible if abs (EXPR) >= MIN_VALUE.
583 : UNSIGNED_P is true if we can assume that abs (EXPR) == EXPR. */
584 : class vec_lower_bound {
585 : public:
586 : vec_lower_bound () {}
587 1622 : vec_lower_bound (tree e, bool u, poly_uint64 m)
588 1622 : : expr (e), unsigned_p (u), min_value (m) {}
589 :
590 : tree expr;
591 : bool unsigned_p;
592 : poly_uint64 min_value;
593 : };
594 :
595 : /* Vectorizer state shared between different analyses like vector sizes
596 : of the same CFG region. */
597 : class vec_info_shared {
598 : public:
599 : vec_info_shared();
600 : ~vec_info_shared();
601 :
602 : void save_datarefs();
603 : void check_datarefs();
604 :
605 : /* All data references. Freed by free_data_refs, so not an auto_vec. */
606 : vec<data_reference_p> datarefs;
607 : vec<data_reference> datarefs_copy;
608 :
609 : /* The loop nest in which the data dependences are computed. */
610 : auto_vec<loop_p> loop_nest;
611 :
612 : /* All data dependences. Freed by free_dependence_relations, so not
613 : an auto_vec. */
614 : vec<ddr_p> ddrs;
615 : };
616 :
617 : /* Vectorizer state common between loop and basic-block vectorization. */
618 : class vec_info {
619 : public:
620 : typedef hash_set<int_hash<machine_mode, E_VOIDmode, E_BLKmode> > mode_set;
621 : enum vec_kind { bb, loop };
622 :
623 : vec_info (vec_kind, vec_info_shared *);
624 : ~vec_info ();
625 :
626 : stmt_vec_info add_stmt (gimple *);
627 : stmt_vec_info add_pattern_stmt (gimple *, stmt_vec_info);
628 : stmt_vec_info resync_stmt_addr (gimple *);
629 : stmt_vec_info lookup_stmt (gimple *);
630 : stmt_vec_info lookup_def (tree);
631 : stmt_vec_info lookup_single_use (tree);
632 : class dr_vec_info *lookup_dr (data_reference *);
633 : void move_dr (stmt_vec_info, stmt_vec_info);
634 : void remove_stmt (stmt_vec_info);
635 : void replace_stmt (gimple_stmt_iterator *, stmt_vec_info, gimple *);
636 : void insert_on_entry (stmt_vec_info, gimple *);
637 : void insert_seq_on_entry (stmt_vec_info, gimple_seq);
638 :
639 : /* The type of vectorization. */
640 : vec_kind kind;
641 :
642 : /* Shared vectorizer state. */
643 : vec_info_shared *shared;
644 :
645 : /* The mapping of GIMPLE UID to stmt_vec_info. */
646 : vec<stmt_vec_info> stmt_vec_infos;
647 : /* Whether the above mapping is complete. */
648 : bool stmt_vec_info_ro;
649 :
650 : /* Whether we've done a transform we think OK to not update virtual
651 : SSA form. */
652 : bool any_known_not_updated_vssa;
653 :
654 : /* The SLP graph. */
655 : auto_vec<slp_instance> slp_instances;
656 :
657 : /* Maps base addresses to an innermost_loop_behavior that gives the maximum
658 : known alignment for that base. */
659 : vec_base_alignments base_alignments;
660 :
661 : /* All interleaving chains of stores, represented by the first
662 : stmt in the chain. */
663 : auto_vec<stmt_vec_info> grouped_stores;
664 :
665 : /* The set of vector modes used in the vectorized region. */
666 : mode_set used_vector_modes;
667 :
668 : /* The argument we should pass to related_vector_mode when looking up
669 : the vector mode for a scalar mode, or VOIDmode if we haven't yet
670 : made any decisions about which vector modes to use. */
671 : machine_mode vector_mode;
672 :
673 : /* The basic blocks in the vectorization region. For _loop_vec_info,
674 : the memory is internally managed, while for _bb_vec_info, it points
675 : to element space of an external auto_vec<>. This inconsistency is
676 : not a good class design pattern. TODO: improve it with an unified
677 : auto_vec<> whose lifetime is confined to vec_info object. */
678 : basic_block *bbs;
679 :
680 : /* The count of the basic blocks in the vectorization region. */
681 : unsigned int nbbs;
682 :
683 : /* Used to keep a sequence of def stmts of a pattern stmt that are loop
684 : invariant if they exists.
685 : The sequence is emitted in the loop preheader should the loop be vectorized
686 : and are reset when undoing patterns. */
687 : gimple_seq inv_pattern_def_seq;
688 :
689 : private:
690 : stmt_vec_info new_stmt_vec_info (gimple *stmt);
691 : void set_vinfo_for_stmt (gimple *, stmt_vec_info, bool = true);
692 : void free_stmt_vec_infos ();
693 : void free_stmt_vec_info (stmt_vec_info);
694 : };
695 :
696 : class _loop_vec_info;
697 : class _bb_vec_info;
698 :
699 : template<>
700 : template<>
701 : inline bool
702 368826845 : is_a_helper <_loop_vec_info *>::test (vec_info *i)
703 : {
704 368216745 : return i->kind == vec_info::loop;
705 : }
706 :
707 : template<>
708 : template<>
709 : inline bool
710 70238763 : is_a_helper <_bb_vec_info *>::test (vec_info *i)
711 : {
712 70238763 : return i->kind == vec_info::bb;
713 : }
714 :
715 : /* In general, we can divide the vector statements in a vectorized loop
716 : into related groups ("rgroups") and say that for each rgroup there is
717 : some nS such that the rgroup operates on nS values from one scalar
718 : iteration followed by nS values from the next. That is, if VF is the
719 : vectorization factor of the loop, the rgroup operates on a sequence:
720 :
721 : (1,1) (1,2) ... (1,nS) (2,1) ... (2,nS) ... (VF,1) ... (VF,nS)
722 :
723 : where (i,j) represents a scalar value with index j in a scalar
724 : iteration with index i.
725 :
726 : [ We use the term "rgroup" to emphasise that this grouping isn't
727 : necessarily the same as the grouping of statements used elsewhere.
728 : For example, if we implement a group of scalar loads using gather
729 : loads, we'll use a separate gather load for each scalar load, and
730 : thus each gather load will belong to its own rgroup. ]
731 :
732 : In general this sequence will occupy nV vectors concatenated
733 : together. If these vectors have nL lanes each, the total number
734 : of scalar values N is given by:
735 :
736 : N = nS * VF = nV * nL
737 :
738 : None of nS, VF, nV and nL are required to be a power of 2. nS and nV
739 : are compile-time constants but VF and nL can be variable (if the target
740 : supports variable-length vectors).
741 :
742 : In classical vectorization, each iteration of the vector loop would
743 : handle exactly VF iterations of the original scalar loop. However,
744 : in vector loops that are able to operate on partial vectors, a
745 : particular iteration of the vector loop might handle fewer than VF
746 : iterations of the scalar loop. The vector lanes that correspond to
747 : iterations of the scalar loop are said to be "active" and the other
748 : lanes are said to be "inactive".
749 :
750 : In such vector loops, many rgroups need to be controlled to ensure
751 : that they have no effect for the inactive lanes. Conceptually, each
752 : such rgroup needs a sequence of booleans in the same order as above,
753 : but with each (i,j) replaced by a boolean that indicates whether
754 : iteration i is active. This sequence occupies nV vector controls
755 : that again have nL lanes each. Thus the control sequence as a whole
756 : consists of VF independent booleans that are each repeated nS times.
757 :
758 : Taking mask-based approach as a partially-populated vectors example.
759 : We make the simplifying assumption that if a sequence of nV masks is
760 : suitable for one (nS,nL) pair, we can reuse it for (nS/2,nL/2) by
761 : VIEW_CONVERTing it. This holds for all current targets that support
762 : fully-masked loops. For example, suppose the scalar loop is:
763 :
764 : float *f;
765 : double *d;
766 : for (int i = 0; i < n; ++i)
767 : {
768 : f[i * 2 + 0] += 1.0f;
769 : f[i * 2 + 1] += 2.0f;
770 : d[i] += 3.0;
771 : }
772 :
773 : and suppose that vectors have 256 bits. The vectorized f accesses
774 : will belong to one rgroup and the vectorized d access to another:
775 :
776 : f rgroup: nS = 2, nV = 1, nL = 8
777 : d rgroup: nS = 1, nV = 1, nL = 4
778 : VF = 4
779 :
780 : [ In this simple example the rgroups do correspond to the normal
781 : SLP grouping scheme. ]
782 :
783 : If only the first three lanes are active, the masks we need are:
784 :
785 : f rgroup: 1 1 | 1 1 | 1 1 | 0 0
786 : d rgroup: 1 | 1 | 1 | 0
787 :
788 : Here we can use a mask calculated for f's rgroup for d's, but not
789 : vice versa.
790 :
791 : Thus for each value of nV, it is enough to provide nV masks, with the
792 : mask being calculated based on the highest nL (or, equivalently, based
793 : on the highest nS) required by any rgroup with that nV. We therefore
794 : represent the entire collection of masks as a two-level table, with the
795 : first level being indexed by nV - 1 (since nV == 0 doesn't exist) and
796 : the second being indexed by the mask index 0 <= i < nV. */
797 :
798 : /* The controls (like masks or lengths) needed by rgroups with nV vectors,
799 : according to the description above. */
800 : struct rgroup_controls {
801 : /* The largest nS for all rgroups that use these controls.
802 : For vect_partial_vectors_avx512 this is the constant nscalars_per_iter
803 : for all members of the group. */
804 : unsigned int max_nscalars_per_iter;
805 :
806 : /* For the largest nS recorded above, the loop controls divide each scalar
807 : into FACTOR equal-sized pieces. This is useful if we need to split
808 : element-based accesses into byte-based accesses.
809 : For vect_partial_vectors_avx512 this records nV instead. */
810 : unsigned int factor;
811 :
812 : /* This is a vector type with MAX_NSCALARS_PER_ITER * VF / nV elements.
813 : For mask-based controls, it is the type of the masks in CONTROLS.
814 : For length-based controls, it can be any vector type that has the
815 : specified number of elements; the type of the elements doesn't matter. */
816 : tree type;
817 :
818 : /* When there is no uniformly used LOOP_VINFO_RGROUP_COMPARE_TYPE this
819 : is the rgroup specific type used. */
820 : tree compare_type;
821 :
822 : /* A vector of nV controls, in iteration order. */
823 : vec<tree> controls;
824 :
825 : /* In case of len_load and len_store with a bias there is only one
826 : rgroup. This holds the adjusted loop length for the this rgroup. */
827 : tree bias_adjusted_ctrl;
828 : };
829 :
830 573065 : struct vec_loop_masks
831 : {
832 503788 : bool is_empty () const { return mask_set.is_empty (); }
833 :
834 : /* Set to record vectype, nvector pairs. */
835 : hash_set<pair_hash <nofree_ptr_hash <tree_node>,
836 : int_hash<unsigned, 0>>> mask_set;
837 :
838 : /* rgroup_controls used for the partial vector scheme. */
839 : auto_vec<rgroup_controls> rgc_vec;
840 : };
841 :
842 : typedef auto_vec<rgroup_controls> vec_loop_lens;
843 :
844 : typedef auto_vec<std::pair<data_reference*, tree> > drs_init_vec;
845 :
846 : /* Abstraction around info on reductions which is still in stmt_vec_info
847 : but will be duplicated or moved elsewhere. */
848 202932 : class vect_reduc_info_s
849 : {
850 : public:
851 : /* The def type of the main reduction PHI, vect_reduction_def or
852 : vect_double_reduction_def. */
853 : enum vect_def_type def_type;
854 :
855 : /* The reduction type as detected by
856 : vect_is_simple_reduction and vectorizable_reduction. */
857 : enum vect_reduction_type reduc_type;
858 :
859 : /* The original scalar reduction code, to be used in the epilogue. */
860 : code_helper reduc_code;
861 :
862 : /* A vector internal function we should use in the epilogue. */
863 : internal_fn reduc_fn;
864 :
865 : /* For loop reduction with multiple vectorized results (ncopies > 1), a
866 : lane-reducing operation participating in it may not use all of those
867 : results, this field specifies result index starting from which any
868 : following land-reducing operation would be assigned to. */
869 : unsigned int reduc_result_pos;
870 :
871 : /* Whether this represents a reduction chain. */
872 : bool is_reduc_chain;
873 :
874 : /* Whether we force a single cycle PHI during reduction vectorization. */
875 : bool force_single_cycle;
876 :
877 : /* The vector type for performing the actual reduction operation. */
878 : tree reduc_vectype;
879 :
880 : /* The vector type we should use for the final reduction in the epilogue
881 : when we reduce a mask. */
882 : tree reduc_vectype_for_mask;
883 :
884 : /* The neutral operand to use, if any. */
885 : tree neutral_op;
886 :
887 : /* For INTEGER_INDUC_COND_REDUCTION, the initial value to be used. */
888 : tree induc_cond_initial_val;
889 :
890 : /* If not NULL the value to be added to compute final reduction value. */
891 : tree reduc_epilogue_adjustment;
892 :
893 : /* If non-null, the reduction is being performed by an epilogue loop
894 : and we have decided to reuse this accumulator from the main loop. */
895 : struct vect_reusable_accumulator *reused_accumulator;
896 :
897 : /* If the vector code is performing N scalar reductions in parallel,
898 : this variable gives the initial scalar values of those N reductions. */
899 : auto_vec<tree> reduc_initial_values;
900 :
901 : /* If the vector code is performing N scalar reductions in parallel, this
902 : variable gives the vectorized code's final (scalar) result for each of
903 : those N reductions. In other words, REDUC_SCALAR_RESULTS[I] replaces
904 : the original scalar code's loop-closed SSA PHI for reduction number I. */
905 : auto_vec<tree> reduc_scalar_results;
906 : };
907 :
908 : typedef class vect_reduc_info_s *vect_reduc_info;
909 :
910 : #define VECT_REDUC_INFO_DEF_TYPE(I) ((I)->def_type)
911 : #define VECT_REDUC_INFO_TYPE(I) ((I)->reduc_type)
912 : #define VECT_REDUC_INFO_CODE(I) ((I)->reduc_code)
913 : #define VECT_REDUC_INFO_FN(I) ((I)->reduc_fn)
914 : #define VECT_REDUC_INFO_SCALAR_RESULTS(I) ((I)->reduc_scalar_results)
915 : #define VECT_REDUC_INFO_INITIAL_VALUES(I) ((I)->reduc_initial_values)
916 : #define VECT_REDUC_INFO_REUSED_ACCUMULATOR(I) ((I)->reused_accumulator)
917 : #define VECT_REDUC_INFO_INDUC_COND_INITIAL_VAL(I) ((I)->induc_cond_initial_val)
918 : #define VECT_REDUC_INFO_EPILOGUE_ADJUSTMENT(I) ((I)->reduc_epilogue_adjustment)
919 : #define VECT_REDUC_INFO_VECTYPE(I) ((I)->reduc_vectype)
920 : #define VECT_REDUC_INFO_VECTYPE_FOR_MASK(I) ((I)->reduc_vectype_for_mask)
921 : #define VECT_REDUC_INFO_FORCE_SINGLE_CYCLE(I) ((I)->force_single_cycle)
922 : #define VECT_REDUC_INFO_RESULT_POS(I) ((I)->reduc_result_pos)
923 : #define VECT_REDUC_INFO_NEUTRAL_OP(I) ((I)->neutral_op)
924 :
925 : /* Information about a reduction accumulator from the main loop that could
926 : conceivably be reused as the input to a reduction in an epilogue loop. */
927 : struct vect_reusable_accumulator {
928 : /* The final value of the accumulator, which forms the input to the
929 : reduction operation. */
930 : tree reduc_input;
931 :
932 : /* The stmt_vec_info that describes the reduction (i.e. the one for
933 : which is_reduc_info is true). */
934 : vect_reduc_info reduc_info;
935 : };
936 :
937 : /*-----------------------------------------------------------------*/
938 : /* Info on vectorized loops. */
939 : /*-----------------------------------------------------------------*/
940 : typedef class _loop_vec_info : public vec_info {
941 : public:
942 : _loop_vec_info (class loop *, vec_info_shared *);
943 : ~_loop_vec_info ();
944 :
945 : /* The loop to which this info struct refers to. */
946 : class loop *loop;
947 :
948 : /* Number of latch executions. */
949 : tree num_itersm1;
950 : /* Number of iterations. */
951 : tree num_iters;
952 : /* Number of iterations of the original loop. */
953 : tree num_iters_unchanged;
954 : /* Condition under which this loop is analyzed and versioned. */
955 : tree num_iters_assumptions;
956 :
957 : /* The cost of the vector code. */
958 : class vector_costs *vector_costs;
959 :
960 : /* The cost of the scalar code. */
961 : class vector_costs *scalar_costs;
962 :
963 : /* Threshold of number of iterations below which vectorization will not be
964 : performed. It is calculated from MIN_PROFITABLE_ITERS and
965 : param_min_vect_loop_bound. */
966 : unsigned int th;
967 :
968 : /* When applying loop versioning, the vector form should only be used
969 : if the number of scalar iterations is >= this value, on top of all
970 : the other requirements. Ignored when loop versioning is not being
971 : used. */
972 : poly_uint64 versioning_threshold;
973 :
974 : /* Unrolling factor. In case of suitable super-word parallelism
975 : it can be that no unrolling is needed, and thus this is 1. */
976 : poly_uint64 vectorization_factor;
977 :
978 : /* If this loop is an epilogue loop whose main loop can be skipped,
979 : MAIN_LOOP_EDGE is the edge from the main loop to this loop's
980 : preheader. SKIP_MAIN_LOOP_EDGE is then the edge that skips the
981 : main loop and goes straight to this loop's preheader.
982 :
983 : Both fields are null otherwise. */
984 : edge main_loop_edge;
985 : edge skip_main_loop_edge;
986 :
987 : /* If this loop is an epilogue loop that might be skipped after executing
988 : the main loop, this edge is the one that skips the epilogue. */
989 : edge skip_this_loop_edge;
990 :
991 : /* Reduction descriptors of this loop. Referenced to from SLP nodes
992 : by index. */
993 : auto_vec<vect_reduc_info> reduc_infos;
994 :
995 : /* The vectorized form of a standard reduction replaces the original
996 : scalar code's final result (a loop-closed SSA PHI) with the result
997 : of a vector-to-scalar reduction operation. After vectorization,
998 : this variable maps these vector-to-scalar results to information
999 : about the reductions that generated them. */
1000 : hash_map<tree, vect_reusable_accumulator> reusable_accumulators;
1001 :
1002 : /* The number of times that the target suggested we unroll the vector loop
1003 : in order to promote more ILP. This value will be used to re-analyze the
1004 : loop for vectorization and if successful the value will be folded into
1005 : vectorization_factor (and therefore exactly divides
1006 : vectorization_factor). */
1007 : unsigned int suggested_unroll_factor;
1008 :
1009 : /* Maximum runtime vectorization factor, or MAX_VECTORIZATION_FACTOR
1010 : if there is no particular limit. */
1011 : unsigned HOST_WIDE_INT max_vectorization_factor;
1012 :
1013 : /* The masks that a fully-masked loop should use to avoid operating
1014 : on inactive scalars. */
1015 : vec_loop_masks masks;
1016 :
1017 : /* The lengths that a loop with length should use to avoid operating
1018 : on inactive scalars. */
1019 : vec_loop_lens lens;
1020 :
1021 : /* Set of scalar conditions that have loop mask applied. */
1022 : scalar_cond_masked_set_type scalar_cond_masked_set;
1023 :
1024 : /* Set of vector conditions that have loop mask applied. */
1025 : vec_cond_masked_set_type vec_cond_masked_set;
1026 :
1027 : /* If we are using a loop mask to align memory addresses, this variable
1028 : contains the number of vector elements that we should skip in the
1029 : first iteration of the vector loop (i.e. the number of leading
1030 : elements that should be false in the first mask). */
1031 : tree mask_skip_niters;
1032 :
1033 : /* If we are using a loop mask to align memory addresses and we're in an
1034 : early break loop then this variable contains the number of elements that
1035 : were skipped during the initial iteration of the loop. */
1036 : tree mask_skip_niters_pfa_offset;
1037 :
1038 : /* The type that the loop control IV should be converted to before
1039 : testing which of the VF scalars are active and inactive.
1040 : Only meaningful if LOOP_VINFO_USING_PARTIAL_VECTORS_P. */
1041 : tree rgroup_compare_type;
1042 :
1043 : /* For #pragma omp simd if (x) loops the x expression. If constant 0,
1044 : the loop should not be vectorized, if constant non-zero, simd_if_cond
1045 : shouldn't be set and loop vectorized normally, if SSA_NAME, the loop
1046 : should be versioned on that condition, using scalar loop if the condition
1047 : is false and vectorized loop otherwise. */
1048 : tree simd_if_cond;
1049 :
1050 : /* The type that the vector loop control IV should have when
1051 : LOOP_VINFO_USING_PARTIAL_VECTORS_P is true. */
1052 : tree rgroup_iv_type;
1053 :
1054 : /* The style used for implementing partial vectors when
1055 : LOOP_VINFO_USING_PARTIAL_VECTORS_P is true. */
1056 : vect_partial_vector_style partial_vector_style;
1057 :
1058 : /* Unknown DRs according to which loop was peeled. */
1059 : class dr_vec_info *unaligned_dr;
1060 :
1061 : /* peeling_for_alignment indicates whether peeling for alignment will take
1062 : place, and what the peeling factor should be:
1063 : peeling_for_alignment = X means:
1064 : If X=0: Peeling for alignment will not be applied.
1065 : If X>0: Peel first X iterations.
1066 : If X=-1: Generate a runtime test to calculate the number of iterations
1067 : to be peeled, using the dataref recorded in the field
1068 : unaligned_dr. */
1069 : int peeling_for_alignment;
1070 :
1071 : /* The mask used to check the alignment of pointers or arrays. */
1072 : poly_uint64 ptr_mask;
1073 :
1074 : /* The maximum speculative read amount in VLA modes for runtime check. */
1075 : poly_uint64 max_spec_read_amount;
1076 :
1077 : /* Indicates whether the loop has any non-linear IV. */
1078 : bool nonlinear_iv;
1079 :
1080 : /* Data Dependence Relations defining address ranges that are candidates
1081 : for a run-time aliasing check. */
1082 : auto_vec<ddr_p> may_alias_ddrs;
1083 :
1084 : /* Data Dependence Relations defining address ranges together with segment
1085 : lengths from which the run-time aliasing check is built. */
1086 : auto_vec<dr_with_seg_len_pair_t> comp_alias_ddrs;
1087 :
1088 : /* Check that the addresses of each pair of objects is unequal. */
1089 : auto_vec<vec_object_pair> check_unequal_addrs;
1090 :
1091 : /* List of values that are required to be nonzero. This is used to check
1092 : whether things like "x[i * n] += 1;" are safe and eventually gets added
1093 : to the checks for lower bounds below. */
1094 : auto_vec<tree> check_nonzero;
1095 :
1096 : /* List of values that need to be checked for a minimum value. */
1097 : auto_vec<vec_lower_bound> lower_bounds;
1098 :
1099 : /* Statements in the loop that have data references that are candidates for a
1100 : runtime (loop versioning) misalignment check. */
1101 : auto_vec<stmt_vec_info> may_misalign_stmts;
1102 :
1103 : /* Reduction cycles detected in the loop. Used in loop-aware SLP. */
1104 : auto_vec<stmt_vec_info> reductions;
1105 :
1106 : /* Defs that could not be analyzed such as OMP SIMD calls without
1107 : a LHS. */
1108 : auto_vec<stmt_vec_info> alternate_defs;
1109 :
1110 : /* Cost vector for a single scalar iteration. */
1111 : auto_vec<stmt_info_for_cost> scalar_cost_vec;
1112 :
1113 : /* Map of IV base/step expressions to inserted name in the preheader. */
1114 : hash_map<tree_operand_hash, tree> *ivexpr_map;
1115 :
1116 : /* Map of OpenMP "omp simd array" scan variables to corresponding
1117 : rhs of the store of the initializer. */
1118 : hash_map<tree, tree> *scan_map;
1119 :
1120 : /* The factor used to over weight those statements in an inner loop
1121 : relative to the loop being vectorized. */
1122 : unsigned int inner_loop_cost_factor;
1123 :
1124 : /* Is the loop vectorizable? */
1125 : bool vectorizable;
1126 :
1127 : /* Records whether we still have the option of vectorizing this loop
1128 : using partially-populated vectors; in other words, whether it is
1129 : still possible for one iteration of the vector loop to handle
1130 : fewer than VF scalars. */
1131 : bool can_use_partial_vectors_p;
1132 :
1133 : /* Records whether we must use niter masking for correctness reasons. */
1134 : bool must_use_partial_vectors_p;
1135 :
1136 : /* True if we've decided to use partially-populated vectors, so that
1137 : the vector loop can handle fewer than VF scalars. */
1138 : bool using_partial_vectors_p;
1139 :
1140 : /* True if we've decided to use a decrementing loop control IV that counts
1141 : scalars. This can be done for any loop that:
1142 :
1143 : (a) uses length "controls"; and
1144 : (b) can iterate more than once. */
1145 : bool using_decrementing_iv_p;
1146 :
1147 : /* True if we've decided to use output of select_vl to adjust IV of
1148 : both loop control and data reference pointer. This is only true
1149 : for single-rgroup control. */
1150 : bool using_select_vl_p;
1151 :
1152 : /* True if we've decided to use peeling with versioning together, which allows
1153 : unaligned unsupported data refs to be uniformly aligned after a certain
1154 : amount of peeling (mutual alignment). Otherwise, we use versioning alone
1155 : so these data refs must be already aligned to a power-of-two boundary
1156 : without peeling. */
1157 : bool allow_mutual_alignment;
1158 :
1159 : /* The bias for len_load and len_store. For now, only 0 and -1 are
1160 : supported. -1 must be used when a backend does not support
1161 : len_load/len_store with a length of zero. */
1162 : signed char partial_load_store_bias;
1163 :
1164 : /* When we have grouped data accesses with gaps, we may introduce invalid
1165 : memory accesses. We peel the last iteration of the loop to prevent
1166 : this. */
1167 : bool peeling_for_gaps;
1168 :
1169 : /* When the number of iterations is not a multiple of the vector size
1170 : we need to peel off iterations at the end to form an epilogue loop. */
1171 : bool peeling_for_niter;
1172 :
1173 : /* When the loop has early breaks that we can vectorize we need to peel
1174 : the loop for the break finding loop. */
1175 : bool early_breaks;
1176 :
1177 : /* List of loop additional IV conditionals found in the loop. */
1178 : auto_vec<gcond *> conds;
1179 :
1180 : /* Main loop IV cond. */
1181 : gcond* loop_iv_cond;
1182 :
1183 : /* True if we have an unroll factor requested by the user through pragma GCC
1184 : unroll. */
1185 : bool user_unroll;
1186 :
1187 : /* True if there are no loop carried data dependencies in the loop.
1188 : If loop->safelen <= 1, then this is always true, either the loop
1189 : didn't have any loop carried data dependencies, or the loop is being
1190 : vectorized guarded with some runtime alias checks, or couldn't
1191 : be vectorized at all, but then this field shouldn't be used.
1192 : For loop->safelen >= 2, the user has asserted that there are no
1193 : backward dependencies, but there still could be loop carried forward
1194 : dependencies in such loops. This flag will be false if normal
1195 : vectorizer data dependency analysis would fail or require versioning
1196 : for alias, but because of loop->safelen >= 2 it has been vectorized
1197 : even without versioning for alias. E.g. in:
1198 : #pragma omp simd
1199 : for (int i = 0; i < m; i++)
1200 : a[i] = a[i + k] * c;
1201 : (or #pragma simd or #pragma ivdep) we can vectorize this and it will
1202 : DTRT even for k > 0 && k < m, but without safelen we would not
1203 : vectorize this, so this field would be false. */
1204 : bool no_data_dependencies;
1205 :
1206 : /* Mark loops having masked stores. */
1207 : bool has_mask_store;
1208 :
1209 : /* Queued scaling factor for the scalar loop. */
1210 : profile_probability scalar_loop_scaling;
1211 :
1212 : /* If if-conversion versioned this loop before conversion, this is the
1213 : loop version without if-conversion. */
1214 : class loop *scalar_loop;
1215 :
1216 : /* For loops being epilogues of already vectorized loops
1217 : this points to the main vectorized loop. Otherwise NULL. */
1218 : _loop_vec_info *main_loop_info;
1219 :
1220 : /* For loops being epilogues of already vectorized loops
1221 : this points to the preceeding vectorized (possibly epilogue) loop.
1222 : Otherwise NULL. */
1223 : _loop_vec_info *orig_loop_info;
1224 :
1225 : /* Used to store loop_vec_infos of the epilogue of this loop during
1226 : analysis. */
1227 : _loop_vec_info *epilogue_vinfo;
1228 :
1229 : /* If this is an epilogue loop the DR advancement applied. */
1230 : tree drs_advanced_by;
1231 :
1232 : /* The controlling loop exit for the current loop when vectorizing.
1233 : For counted loops, this IV controls the natural exits of the loop. */
1234 : edge vec_loop_main_exit;
1235 :
1236 : /* The controlling loop exit for the epilogue loop when vectorizing.
1237 : For counted loops, this IV controls the natural exits of the loop. */
1238 : edge vec_epilogue_loop_main_exit;
1239 :
1240 : /* The controlling loop exit for the scalar loop being vectorized.
1241 : For counted loops, this IV controls the natural exits of the loop. */
1242 : edge scalar_loop_main_exit;
1243 :
1244 : /* Used to store the list of stores needing to be moved if doing early
1245 : break vectorization as they would violate the scalar loop semantics if
1246 : vectorized in their current location. These are stored in order that they
1247 : need to be moved. */
1248 : auto_vec<gimple *> early_break_stores;
1249 :
1250 : /* The final basic block where to move statements to. In the case of
1251 : multiple exits this could be pretty far away. */
1252 : basic_block early_break_dest_bb;
1253 :
1254 : /* Statements whose VUSES need updating if early break vectorization is to
1255 : happen. */
1256 : auto_vec<gimple*> early_break_vuses;
1257 :
1258 : /* The IV adjustment value for inductions that needs to be materialized
1259 : inside the relavent exit blocks in order to adjust for early break. */
1260 : tree early_break_niters_var;
1261 :
1262 : /* The type of the variable to be used to create the scalar IV for early break
1263 : loops. */
1264 : tree early_break_iv_type;
1265 :
1266 : /* Record statements that are needed to be live for early break vectorization
1267 : but may not have an LC PHI node materialized yet in the exits. */
1268 : auto_vec<stmt_vec_info> early_break_live_ivs;
1269 : } *loop_vec_info;
1270 :
1271 : /* Access Functions. */
1272 : #define LOOP_VINFO_LOOP(L) (L)->loop
1273 : #define LOOP_VINFO_MAIN_EXIT(L) (L)->vec_loop_main_exit
1274 : #define LOOP_VINFO_EPILOGUE_MAIN_EXIT(L) (L)->vec_epilogue_loop_main_exit
1275 : #define LOOP_VINFO_SCALAR_MAIN_EXIT(L) (L)->scalar_loop_main_exit
1276 : #define LOOP_VINFO_BBS(L) (L)->bbs
1277 : #define LOOP_VINFO_NBBS(L) (L)->nbbs
1278 : #define LOOP_VINFO_NITERSM1(L) (L)->num_itersm1
1279 : #define LOOP_VINFO_NITERS(L) (L)->num_iters
1280 : #define LOOP_VINFO_NITERS_UNCOUNTED_P(L) (LOOP_VINFO_NITERS (L) \
1281 : == chrec_dont_know)
1282 : /* Since LOOP_VINFO_NITERS and LOOP_VINFO_NITERSM1 can change after
1283 : prologue peeling retain total unchanged scalar loop iterations for
1284 : cost model. */
1285 : #define LOOP_VINFO_NITERS_UNCHANGED(L) (L)->num_iters_unchanged
1286 : #define LOOP_VINFO_NITERS_ASSUMPTIONS(L) (L)->num_iters_assumptions
1287 : #define LOOP_VINFO_COST_MODEL_THRESHOLD(L) (L)->th
1288 : #define LOOP_VINFO_VERSIONING_THRESHOLD(L) (L)->versioning_threshold
1289 : #define LOOP_VINFO_VECTORIZABLE_P(L) (L)->vectorizable
1290 : #define LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P(L) (L)->can_use_partial_vectors_p
1291 : #define LOOP_VINFO_MUST_USE_PARTIAL_VECTORS_P(L) (L)->must_use_partial_vectors_p
1292 : #define LOOP_VINFO_USING_PARTIAL_VECTORS_P(L) (L)->using_partial_vectors_p
1293 : #define LOOP_VINFO_USING_DECREMENTING_IV_P(L) (L)->using_decrementing_iv_p
1294 : #define LOOP_VINFO_USING_SELECT_VL_P(L) (L)->using_select_vl_p
1295 : #define LOOP_VINFO_ALLOW_MUTUAL_ALIGNMENT(L) (L)->allow_mutual_alignment
1296 : #define LOOP_VINFO_PARTIAL_LOAD_STORE_BIAS(L) (L)->partial_load_store_bias
1297 : #define LOOP_VINFO_VECT_FACTOR(L) (L)->vectorization_factor
1298 : #define LOOP_VINFO_MAX_VECT_FACTOR(L) (L)->max_vectorization_factor
1299 : #define LOOP_VINFO_MASKS(L) (L)->masks
1300 : #define LOOP_VINFO_LENS(L) (L)->lens
1301 : #define LOOP_VINFO_MASK_SKIP_NITERS(L) (L)->mask_skip_niters
1302 : #define LOOP_VINFO_MASK_NITERS_PFA_OFFSET(L) (L)->mask_skip_niters_pfa_offset
1303 : #define LOOP_VINFO_RGROUP_COMPARE_TYPE(L) (L)->rgroup_compare_type
1304 : #define LOOP_VINFO_RGROUP_IV_TYPE(L) (L)->rgroup_iv_type
1305 : #define LOOP_VINFO_PARTIAL_VECTORS_STYLE(L) (L)->partial_vector_style
1306 : #define LOOP_VINFO_PTR_MASK(L) (L)->ptr_mask
1307 : #define LOOP_VINFO_MAX_SPEC_READ_AMOUNT(L) (L)->max_spec_read_amount
1308 : #define LOOP_VINFO_LOOP_NEST(L) (L)->shared->loop_nest
1309 : #define LOOP_VINFO_DATAREFS(L) (L)->shared->datarefs
1310 : #define LOOP_VINFO_DDRS(L) (L)->shared->ddrs
1311 : #define LOOP_VINFO_INT_NITERS(L) (TREE_INT_CST_LOW ((L)->num_iters))
1312 : #define LOOP_VINFO_PEELING_FOR_ALIGNMENT(L) (L)->peeling_for_alignment
1313 : #define LOOP_VINFO_NON_LINEAR_IV(L) (L)->nonlinear_iv
1314 : #define LOOP_VINFO_UNALIGNED_DR(L) (L)->unaligned_dr
1315 : #define LOOP_VINFO_MAY_MISALIGN_STMTS(L) (L)->may_misalign_stmts
1316 : #define LOOP_VINFO_MAY_ALIAS_DDRS(L) (L)->may_alias_ddrs
1317 : #define LOOP_VINFO_COMP_ALIAS_DDRS(L) (L)->comp_alias_ddrs
1318 : #define LOOP_VINFO_CHECK_UNEQUAL_ADDRS(L) (L)->check_unequal_addrs
1319 : #define LOOP_VINFO_CHECK_NONZERO(L) (L)->check_nonzero
1320 : #define LOOP_VINFO_LOWER_BOUNDS(L) (L)->lower_bounds
1321 : #define LOOP_VINFO_USER_UNROLL(L) (L)->user_unroll
1322 : #define LOOP_VINFO_GROUPED_STORES(L) (L)->grouped_stores
1323 : #define LOOP_VINFO_SLP_INSTANCES(L) (L)->slp_instances
1324 : #define LOOP_VINFO_REDUCTIONS(L) (L)->reductions
1325 : #define LOOP_VINFO_PEELING_FOR_GAPS(L) (L)->peeling_for_gaps
1326 : #define LOOP_VINFO_PEELING_FOR_NITER(L) (L)->peeling_for_niter
1327 : #define LOOP_VINFO_EARLY_BREAKS(L) (L)->early_breaks
1328 : #define LOOP_VINFO_EARLY_BRK_STORES(L) (L)->early_break_stores
1329 : #define LOOP_VINFO_EARLY_BREAKS_VECT_PEELED(L) \
1330 : ((single_pred ((L)->loop->latch) != (L)->vec_loop_main_exit->src) \
1331 : || LOOP_VINFO_NITERS_UNCOUNTED_P (L))
1332 : #define LOOP_VINFO_EARLY_BREAKS_LIVE_IVS(L) \
1333 : (L)->early_break_live_ivs
1334 : #define LOOP_VINFO_EARLY_BRK_DEST_BB(L) (L)->early_break_dest_bb
1335 : #define LOOP_VINFO_EARLY_BRK_VUSES(L) (L)->early_break_vuses
1336 : #define LOOP_VINFO_EARLY_BRK_NITERS_VAR(L) (L)->early_break_niters_var
1337 : #define LOOP_VINFO_EARLY_BRK_IV_TYPE(L) (L)->early_break_iv_type
1338 : #define LOOP_VINFO_LOOP_CONDS(L) (L)->conds
1339 : #define LOOP_VINFO_LOOP_IV_COND(L) (L)->loop_iv_cond
1340 : #define LOOP_VINFO_NO_DATA_DEPENDENCIES(L) (L)->no_data_dependencies
1341 : #define LOOP_VINFO_SCALAR_LOOP(L) (L)->scalar_loop
1342 : #define LOOP_VINFO_SCALAR_LOOP_SCALING(L) (L)->scalar_loop_scaling
1343 : #define LOOP_VINFO_HAS_MASK_STORE(L) (L)->has_mask_store
1344 : #define LOOP_VINFO_SCALAR_ITERATION_COST(L) (L)->scalar_cost_vec
1345 : #define LOOP_VINFO_MAIN_LOOP_INFO(L) (L)->main_loop_info
1346 : #define LOOP_VINFO_ORIG_LOOP_INFO(L) (L)->orig_loop_info
1347 : #define LOOP_VINFO_SIMD_IF_COND(L) (L)->simd_if_cond
1348 : #define LOOP_VINFO_INNER_LOOP_COST_FACTOR(L) (L)->inner_loop_cost_factor
1349 : #define LOOP_VINFO_INV_PATTERN_DEF_SEQ(L) (L)->inv_pattern_def_seq
1350 : #define LOOP_VINFO_DRS_ADVANCED_BY(L) (L)->drs_advanced_by
1351 : #define LOOP_VINFO_ALTERNATE_DEFS(L) (L)->alternate_defs
1352 :
1353 : #define LOOP_VINFO_FULLY_MASKED_P(L) \
1354 : (LOOP_VINFO_USING_PARTIAL_VECTORS_P (L) \
1355 : && !LOOP_VINFO_MASKS (L).is_empty ())
1356 :
1357 : #define LOOP_VINFO_FULLY_WITH_LENGTH_P(L) \
1358 : (LOOP_VINFO_USING_PARTIAL_VECTORS_P (L) \
1359 : && !LOOP_VINFO_LENS (L).is_empty ())
1360 :
1361 : #define LOOP_REQUIRES_VERSIONING_FOR_ALIGNMENT(L) \
1362 : ((L)->may_misalign_stmts.length () > 0)
1363 : #define LOOP_REQUIRES_VERSIONING_FOR_SPEC_READ(L) \
1364 : (maybe_gt ((L)->max_spec_read_amount, 0U))
1365 : #define LOOP_REQUIRES_VERSIONING_FOR_ALIAS(L) \
1366 : ((L)->comp_alias_ddrs.length () > 0 \
1367 : || (L)->check_unequal_addrs.length () > 0 \
1368 : || (L)->lower_bounds.length () > 0)
1369 : #define LOOP_REQUIRES_VERSIONING_FOR_NITERS(L) \
1370 : (LOOP_VINFO_NITERS_ASSUMPTIONS (L))
1371 : #define LOOP_REQUIRES_VERSIONING_FOR_SIMD_IF_COND(L) \
1372 : (LOOP_VINFO_SIMD_IF_COND (L))
1373 : #define LOOP_REQUIRES_VERSIONING(L) \
1374 : (LOOP_REQUIRES_VERSIONING_FOR_ALIGNMENT (L) \
1375 : || LOOP_REQUIRES_VERSIONING_FOR_SPEC_READ (L) \
1376 : || LOOP_REQUIRES_VERSIONING_FOR_ALIAS (L) \
1377 : || LOOP_REQUIRES_VERSIONING_FOR_NITERS (L) \
1378 : || LOOP_REQUIRES_VERSIONING_FOR_SIMD_IF_COND (L))
1379 :
1380 : #define LOOP_VINFO_USE_VERSIONING_WITHOUT_PEELING(L) \
1381 : ((L)->may_misalign_stmts.length () > 0 \
1382 : && !LOOP_VINFO_ALLOW_MUTUAL_ALIGNMENT (L))
1383 :
1384 : #define LOOP_VINFO_NITERS_KNOWN_P(L) \
1385 : (tree_fits_shwi_p ((L)->num_iters) && tree_to_shwi ((L)->num_iters) > 0)
1386 :
1387 : #define LOOP_VINFO_EPILOGUE_P(L) \
1388 : (LOOP_VINFO_ORIG_LOOP_INFO (L) != NULL)
1389 :
1390 : #define LOOP_VINFO_ORIG_MAX_VECT_FACTOR(L) \
1391 : (LOOP_VINFO_MAX_VECT_FACTOR (LOOP_VINFO_ORIG_LOOP_INFO (L)))
1392 :
1393 : /* Wrapper for loop_vec_info, for tracking success/failure, where a non-NULL
1394 : value signifies success, and a NULL value signifies failure, supporting
1395 : propagating an opt_problem * describing the failure back up the call
1396 : stack. */
1397 : typedef opt_pointer_wrapper <loop_vec_info> opt_loop_vec_info;
1398 :
1399 : inline loop_vec_info
1400 532247 : loop_vec_info_for_loop (class loop *loop)
1401 : {
1402 532247 : return (loop_vec_info) loop->aux;
1403 : }
1404 :
1405 : struct slp_root
1406 : {
1407 1219231 : slp_root (slp_instance_kind kind_, vec<stmt_vec_info> stmts_,
1408 12824 : vec<stmt_vec_info> roots_, vec<tree> remain_ = vNULL)
1409 1219231 : : kind(kind_), stmts(stmts_), roots(roots_), remain(remain_) {}
1410 : slp_instance_kind kind;
1411 : vec<stmt_vec_info> stmts;
1412 : vec<stmt_vec_info> roots;
1413 : vec<tree> remain;
1414 : };
1415 :
1416 : typedef class _bb_vec_info : public vec_info
1417 : {
1418 : public:
1419 : _bb_vec_info (vec<basic_block> bbs, vec_info_shared *);
1420 : ~_bb_vec_info ();
1421 :
1422 : vec<slp_root> roots;
1423 : } *bb_vec_info;
1424 :
1425 : #define BB_VINFO_BBS(B) (B)->bbs
1426 : #define BB_VINFO_NBBS(B) (B)->nbbs
1427 : #define BB_VINFO_GROUPED_STORES(B) (B)->grouped_stores
1428 : #define BB_VINFO_SLP_INSTANCES(B) (B)->slp_instances
1429 : #define BB_VINFO_DATAREFS(B) (B)->shared->datarefs
1430 : #define BB_VINFO_DDRS(B) (B)->shared->ddrs
1431 :
1432 : /* Indicates whether/how a variable is used in the scope of loop/basic
1433 : block. */
1434 : enum vect_relevant {
1435 : vect_unused_in_scope = 0,
1436 :
1437 : /* The def is only used outside the loop. */
1438 : vect_used_only_live,
1439 : /* The def is in the inner loop, and the use is in the outer loop, and the
1440 : use is a reduction stmt. */
1441 : vect_used_in_outer_by_reduction,
1442 : /* The def is in the inner loop, and the use is in the outer loop (and is
1443 : not part of reduction). */
1444 : vect_used_in_outer,
1445 :
1446 : /* defs that feed computations that end up (only) in a reduction. These
1447 : defs may be used by non-reduction stmts, but eventually, any
1448 : computations/values that are affected by these defs are used to compute
1449 : a reduction (i.e. don't get stored to memory, for example). We use this
1450 : to identify computations that we can change the order in which they are
1451 : computed. */
1452 : vect_used_by_reduction,
1453 :
1454 : vect_used_in_scope
1455 : };
1456 :
1457 : /* The type of vectorization. pure_slp means the stmt is covered by the
1458 : SLP graph, not_vect means it is not. This is mostly used by BB
1459 : vectorization. */
1460 : enum slp_vect_type {
1461 : not_vect = 0,
1462 : pure_slp,
1463 : };
1464 :
1465 : /* Says whether a statement is a load, a store of a vectorized statement
1466 : result, or a store of an invariant value. */
1467 : enum vec_load_store_type {
1468 : VLS_LOAD,
1469 : VLS_STORE,
1470 : VLS_STORE_INVARIANT
1471 : };
1472 :
1473 : class dr_vec_info {
1474 : public:
1475 : /* The data reference itself. */
1476 : data_reference *dr;
1477 : /* The statement that contains the data reference. */
1478 : stmt_vec_info stmt;
1479 : /* The analysis group this DR belongs to when doing BB vectorization.
1480 : DRs of the same group belong to the same conditional execution context. */
1481 : unsigned group;
1482 : /* The misalignment in bytes of the reference, or -1 if not known. */
1483 : int misalignment;
1484 : /* The byte alignment that we'd ideally like the reference to have,
1485 : and the value that misalignment is measured against. */
1486 : poly_uint64 target_alignment;
1487 : /* If true the alignment of base_decl needs to be increased. */
1488 : bool base_misaligned;
1489 :
1490 : /* Set by early break vectorization when this DR needs peeling for alignment
1491 : for correctness. */
1492 : bool safe_speculative_read_required;
1493 :
1494 : /* Set by early break vectorization when this DR's scalar accesses are known
1495 : to be inbounds of a known bounds loop. */
1496 : bool scalar_access_known_in_bounds;
1497 :
1498 : tree base_decl;
1499 :
1500 : /* Stores current vectorized loop's offset. To be added to the DR's
1501 : offset to calculate current offset of data reference. */
1502 : tree offset;
1503 : };
1504 :
1505 : typedef struct data_reference *dr_p;
1506 :
1507 : class _stmt_vec_info {
1508 : public:
1509 :
1510 : /* Indicates whether this stmts is part of a computation whose result is
1511 : used outside the loop. */
1512 : bool live;
1513 :
1514 : /* Stmt is part of some pattern (computation idiom) */
1515 : bool in_pattern_p;
1516 :
1517 : /* True if the statement was created during pattern recognition as
1518 : part of the replacement for RELATED_STMT. This implies that the
1519 : statement isn't part of any basic block, although for convenience
1520 : its gimple_bb is the same as for RELATED_STMT. */
1521 : bool pattern_stmt_p;
1522 :
1523 : /* Is this statement vectorizable or should it be skipped in (partial)
1524 : vectorization. */
1525 : bool vectorizable;
1526 :
1527 : /* The stmt to which this info struct refers to. */
1528 : gimple *stmt;
1529 :
1530 : /* The vector type to be used for the LHS of this statement. */
1531 : tree vectype;
1532 :
1533 : /* The following is relevant only for stmts that contain a non-scalar
1534 : data-ref (array/pointer/struct access). A GIMPLE stmt is expected to have
1535 : at most one such data-ref. */
1536 :
1537 : dr_vec_info dr_aux;
1538 :
1539 : /* Information about the data-ref relative to this loop
1540 : nest (the loop that is being considered for vectorization). */
1541 : innermost_loop_behavior dr_wrt_vec_loop;
1542 :
1543 : /* For loop PHI nodes, the base and evolution part of it. This makes sure
1544 : this information is still available in vect_update_ivs_after_vectorizer
1545 : where we may not be able to re-analyze the PHI nodes evolution as
1546 : peeling for the prologue loop can make it unanalyzable. The evolution
1547 : part is still correct after peeling, but the base may have changed from
1548 : the version here. */
1549 : tree loop_phi_evolution_base_unchanged;
1550 : tree loop_phi_evolution_part;
1551 : enum vect_induction_op_type loop_phi_evolution_type;
1552 :
1553 : /* Used for various bookkeeping purposes, generally holding a pointer to
1554 : some other stmt S that is in some way "related" to this stmt.
1555 : Current use of this field is:
1556 : If this stmt is part of a pattern (i.e. the field 'in_pattern_p' is
1557 : true): S is the "pattern stmt" that represents (and replaces) the
1558 : sequence of stmts that constitutes the pattern. Similarly, the
1559 : related_stmt of the "pattern stmt" points back to this stmt (which is
1560 : the last stmt in the original sequence of stmts that constitutes the
1561 : pattern). */
1562 : stmt_vec_info related_stmt;
1563 :
1564 : /* Used to keep a sequence of def stmts of a pattern stmt if such exists.
1565 : The sequence is attached to the original statement rather than the
1566 : pattern statement. */
1567 : gimple_seq pattern_def_seq;
1568 :
1569 : /* Classify the def of this stmt. */
1570 : enum vect_def_type def_type;
1571 :
1572 : /* Whether the stmt is SLPed, loop-based vectorized, or both. */
1573 : enum slp_vect_type slp_type;
1574 :
1575 : /* Interleaving chains info. */
1576 : /* First element in the group. */
1577 : stmt_vec_info first_element;
1578 : /* Pointer to the next element in the group. */
1579 : stmt_vec_info next_element;
1580 : /* The size of the group. */
1581 : unsigned int size;
1582 : /* For loads only, the gap from the previous load. For consecutive loads, GAP
1583 : is 1. */
1584 : unsigned int gap;
1585 :
1586 : /* The minimum negative dependence distance this stmt participates in
1587 : or zero if none. */
1588 : unsigned int min_neg_dist;
1589 :
1590 : /* Not all stmts in the loop need to be vectorized. e.g, the increment
1591 : of the loop induction variable and computation of array indexes. relevant
1592 : indicates whether the stmt needs to be vectorized. */
1593 : enum vect_relevant relevant;
1594 :
1595 : /* For loads if this is a gather, for stores if this is a scatter. */
1596 : bool gather_scatter_p;
1597 :
1598 : /* True if this is an access with loop-invariant stride. */
1599 : bool strided_p;
1600 :
1601 : /* For both loads and stores. */
1602 : unsigned simd_lane_access_p : 3;
1603 :
1604 : /* On a reduction PHI the reduction type as detected by
1605 : vect_is_simple_reduction. */
1606 : enum vect_reduction_type reduc_type;
1607 :
1608 : /* On a reduction PHI, the original reduction code as detected by
1609 : vect_is_simple_reduction. */
1610 : code_helper reduc_code;
1611 :
1612 : /* On a stmt participating in a reduction the index of the operand
1613 : on the reduction SSA cycle. */
1614 : int reduc_idx;
1615 :
1616 : /* On a reduction PHI the def returned by vect_is_simple_reduction.
1617 : On the def returned by vect_is_simple_reduction the corresponding PHI. */
1618 : stmt_vec_info reduc_def;
1619 :
1620 : /* If nonzero, the lhs of the statement could be truncated to this
1621 : many bits without affecting any users of the result. */
1622 : unsigned int min_output_precision;
1623 :
1624 : /* If nonzero, all non-boolean input operands have the same precision,
1625 : and they could each be truncated to this many bits without changing
1626 : the result. */
1627 : unsigned int min_input_precision;
1628 :
1629 : /* If OPERATION_BITS is nonzero, the statement could be performed on
1630 : an integer with the sign and number of bits given by OPERATION_SIGN
1631 : and OPERATION_BITS without changing the result. */
1632 : unsigned int operation_precision;
1633 : signop operation_sign;
1634 :
1635 : /* If the statement produces a boolean result, this value describes
1636 : how we should choose the associated vector type. The possible
1637 : values are:
1638 :
1639 : - an integer precision N if we should use the vector mask type
1640 : associated with N-bit integers. This is only used if all relevant
1641 : input booleans also want the vector mask type for N-bit integers,
1642 : or if we can convert them into that form by pattern-matching.
1643 :
1644 : - ~0U if we considered choosing a vector mask type but decided
1645 : to treat the boolean as a normal integer type instead.
1646 :
1647 : - 0 otherwise. This means either that the operation isn't one that
1648 : could have a vector mask type (and so should have a normal vector
1649 : type instead) or that we simply haven't made a choice either way. */
1650 : unsigned int mask_precision;
1651 :
1652 : /* True if this is only suitable for SLP vectorization. */
1653 : bool slp_vect_only_p;
1654 : };
1655 :
1656 : /* Information about a gather/scatter call. */
1657 : struct gather_scatter_info {
1658 : /* The internal function to use for the gather/scatter operation,
1659 : or IFN_LAST if a built-in function should be used instead. */
1660 : internal_fn ifn;
1661 :
1662 : /* The FUNCTION_DECL for the built-in gather/scatter function,
1663 : or null if an internal function should be used instead. */
1664 : tree decl;
1665 :
1666 : /* The loop-invariant base value. */
1667 : tree base;
1668 :
1669 : /* The TBBA alias pointer the value of which determines the alignment
1670 : of the scalar accesses. */
1671 : tree alias_ptr;
1672 :
1673 : /* The original scalar offset, which is a non-loop-invariant SSA_NAME. */
1674 : tree offset;
1675 :
1676 : /* Each offset element should be multiplied by this amount before
1677 : being added to the base. */
1678 : int scale;
1679 :
1680 : /* The type of the vectorized offset. */
1681 : tree offset_vectype;
1682 :
1683 : /* The type of the scalar elements after loading or before storing. */
1684 : tree element_type;
1685 :
1686 : /* The type of the scalar elements being loaded or stored. */
1687 : tree memory_type;
1688 : };
1689 :
1690 : /* Access Functions. */
1691 : #define STMT_VINFO_STMT(S) (S)->stmt
1692 : #define STMT_VINFO_RELEVANT(S) (S)->relevant
1693 : #define STMT_VINFO_LIVE_P(S) (S)->live
1694 : #define STMT_VINFO_VECTYPE(S) (S)->vectype
1695 : #define STMT_VINFO_VECTORIZABLE(S) (S)->vectorizable
1696 : #define STMT_VINFO_DATA_REF(S) ((S)->dr_aux.dr + 0)
1697 : #define STMT_VINFO_GATHER_SCATTER_P(S) (S)->gather_scatter_p
1698 : #define STMT_VINFO_STRIDED_P(S) (S)->strided_p
1699 : #define STMT_VINFO_SIMD_LANE_ACCESS_P(S) (S)->simd_lane_access_p
1700 : #define STMT_VINFO_REDUC_IDX(S) (S)->reduc_idx
1701 :
1702 : #define STMT_VINFO_DR_WRT_VEC_LOOP(S) (S)->dr_wrt_vec_loop
1703 : #define STMT_VINFO_DR_BASE_ADDRESS(S) (S)->dr_wrt_vec_loop.base_address
1704 : #define STMT_VINFO_DR_INIT(S) (S)->dr_wrt_vec_loop.init
1705 : #define STMT_VINFO_DR_OFFSET(S) (S)->dr_wrt_vec_loop.offset
1706 : #define STMT_VINFO_DR_STEP(S) (S)->dr_wrt_vec_loop.step
1707 : #define STMT_VINFO_DR_BASE_ALIGNMENT(S) (S)->dr_wrt_vec_loop.base_alignment
1708 : #define STMT_VINFO_DR_BASE_MISALIGNMENT(S) \
1709 : (S)->dr_wrt_vec_loop.base_misalignment
1710 : #define STMT_VINFO_DR_OFFSET_ALIGNMENT(S) \
1711 : (S)->dr_wrt_vec_loop.offset_alignment
1712 : #define STMT_VINFO_DR_STEP_ALIGNMENT(S) \
1713 : (S)->dr_wrt_vec_loop.step_alignment
1714 :
1715 : #define STMT_VINFO_DR_INFO(S) \
1716 : (gcc_checking_assert ((S)->dr_aux.stmt == (S)), &(S)->dr_aux)
1717 :
1718 : #define STMT_VINFO_IN_PATTERN_P(S) (S)->in_pattern_p
1719 : #define STMT_VINFO_RELATED_STMT(S) (S)->related_stmt
1720 : #define STMT_VINFO_PATTERN_DEF_SEQ(S) (S)->pattern_def_seq
1721 : #define STMT_VINFO_DEF_TYPE(S) (S)->def_type
1722 : #define STMT_VINFO_GROUPED_ACCESS(S) \
1723 : ((S)->dr_aux.dr && DR_GROUP_FIRST_ELEMENT(S))
1724 : #define STMT_VINFO_LOOP_PHI_EVOLUTION_BASE_UNCHANGED(S) (S)->loop_phi_evolution_base_unchanged
1725 : #define STMT_VINFO_LOOP_PHI_EVOLUTION_PART(S) (S)->loop_phi_evolution_part
1726 : #define STMT_VINFO_LOOP_PHI_EVOLUTION_TYPE(S) (S)->loop_phi_evolution_type
1727 : #define STMT_VINFO_MIN_NEG_DIST(S) (S)->min_neg_dist
1728 : #define STMT_VINFO_REDUC_TYPE(S) (S)->reduc_type
1729 : #define STMT_VINFO_REDUC_CODE(S) (S)->reduc_code
1730 : #define STMT_VINFO_REDUC_DEF(S) (S)->reduc_def
1731 : #define STMT_VINFO_SLP_VECT_ONLY(S) (S)->slp_vect_only_p
1732 : #define STMT_VINFO_REDUC_VECTYPE_IN(S) (S)->reduc_vectype_in
1733 :
1734 : #define DR_GROUP_FIRST_ELEMENT(S) \
1735 : (gcc_checking_assert ((S)->dr_aux.dr), (S)->first_element)
1736 : #define DR_GROUP_NEXT_ELEMENT(S) \
1737 : (gcc_checking_assert ((S)->dr_aux.dr), (S)->next_element)
1738 : #define DR_GROUP_SIZE(S) \
1739 : (gcc_checking_assert ((S)->dr_aux.dr), (S)->size)
1740 : #define DR_GROUP_GAP(S) \
1741 : (gcc_checking_assert ((S)->dr_aux.dr), (S)->gap)
1742 :
1743 : #define STMT_VINFO_RELEVANT_P(S) ((S)->relevant != vect_unused_in_scope)
1744 :
1745 : #define PURE_SLP_STMT(S) ((S)->slp_type == pure_slp)
1746 : #define STMT_SLP_TYPE(S) (S)->slp_type
1747 :
1748 :
1749 : /* Contains the scalar or vector costs for a vec_info. */
1750 : class vector_costs
1751 : {
1752 : public:
1753 : vector_costs (vec_info *, bool);
1754 0 : virtual ~vector_costs () {}
1755 :
1756 : /* Update the costs in response to adding COUNT copies of a statement.
1757 :
1758 : - WHERE specifies whether the cost occurs in the loop prologue,
1759 : the loop body, or the loop epilogue.
1760 : - KIND is the kind of statement, which is always meaningful.
1761 : - STMT_INFO or NODE, if nonnull, describe the statement that will be
1762 : vectorized.
1763 : - VECTYPE, if nonnull, is the vector type that the vectorized
1764 : statement will operate on. Note that this should be used in
1765 : preference to STMT_VINFO_VECTYPE (STMT_INFO) since the latter
1766 : is not correct for SLP.
1767 : - for unaligned_load and unaligned_store statements, MISALIGN is
1768 : the byte misalignment of the load or store relative to the target's
1769 : preferred alignment for VECTYPE, or DR_MISALIGNMENT_UNKNOWN
1770 : if the misalignment is not known.
1771 :
1772 : Return the calculated cost as well as recording it. The return
1773 : value is used for dumping purposes. */
1774 : virtual unsigned int add_stmt_cost (int count, vect_cost_for_stmt kind,
1775 : stmt_vec_info stmt_info,
1776 : slp_tree node,
1777 : tree vectype, int misalign,
1778 : vect_cost_model_location where);
1779 :
1780 : /* Finish calculating the cost of the code. The results can be
1781 : read back using the functions below.
1782 :
1783 : If the costs describe vector code, SCALAR_COSTS gives the costs
1784 : of the corresponding scalar code, otherwise it is null. */
1785 : virtual void finish_cost (const vector_costs *scalar_costs);
1786 :
1787 : /* The costs in THIS and OTHER both describe ways of vectorizing
1788 : a main loop. Return true if the costs described by THIS are
1789 : cheaper than the costs described by OTHER. Return false if any
1790 : of the following are true:
1791 :
1792 : - THIS and OTHER are of equal cost
1793 : - OTHER is better than THIS
1794 : - we can't be sure about the relative costs of THIS and OTHER. */
1795 : virtual bool better_main_loop_than_p (const vector_costs *other) const;
1796 :
1797 : /* Likewise, but the costs in THIS and OTHER both describe ways of
1798 : vectorizing an epilogue loop of MAIN_LOOP. */
1799 : virtual bool better_epilogue_loop_than_p (const vector_costs *other,
1800 : loop_vec_info main_loop) const;
1801 :
1802 : unsigned int prologue_cost () const;
1803 : unsigned int body_cost () const;
1804 : unsigned int epilogue_cost () const;
1805 : unsigned int outside_cost () const;
1806 : unsigned int total_cost () const;
1807 :
1808 : unsigned int suggested_unroll_factor () const;
1809 : machine_mode suggested_epilogue_mode (int &masked) const;
1810 :
1811 32297 : vec_info *vinfo () const { return m_vinfo; }
1812 7447795 : bool costing_for_scalar () const { return m_costing_for_scalar; }
1813 :
1814 : protected:
1815 : unsigned int record_stmt_cost (stmt_vec_info, vect_cost_model_location,
1816 : unsigned int);
1817 : unsigned int adjust_cost_for_freq (stmt_vec_info, vect_cost_model_location,
1818 : unsigned int);
1819 : int compare_inside_loop_cost (const vector_costs *) const;
1820 : int compare_outside_loop_cost (const vector_costs *) const;
1821 :
1822 : /* The region of code that we're considering vectorizing. */
1823 : vec_info *m_vinfo;
1824 :
1825 : /* True if we're costing the scalar code, false if we're costing
1826 : the vector code. */
1827 : bool m_costing_for_scalar;
1828 :
1829 : /* The costs of the three regions, indexed by vect_cost_model_location. */
1830 : unsigned int m_costs[3];
1831 :
1832 : /* The suggested unrolling factor determined at finish_cost. */
1833 : unsigned int m_suggested_unroll_factor;
1834 :
1835 : /* The suggested mode to be used for a vectorized epilogue or VOIDmode,
1836 : determined at finish_cost. m_masked_epilogue specifies whether the
1837 : epilogue should use masked vectorization, regardless of the
1838 : --param vect-partial-vector-usage default. If -1 then the
1839 : --param setting takes precedence. If the user explicitly specified
1840 : --param vect-partial-vector-usage then that takes precedence. */
1841 : machine_mode m_suggested_epilogue_mode;
1842 : int m_masked_epilogue;
1843 :
1844 : /* True if finish_cost has been called. */
1845 : bool m_finished;
1846 : };
1847 :
1848 : /* Create costs for VINFO. COSTING_FOR_SCALAR is true if the costs
1849 : are for scalar code, false if they are for vector code. */
1850 :
1851 : inline
1852 2086803 : vector_costs::vector_costs (vec_info *vinfo, bool costing_for_scalar)
1853 2086803 : : m_vinfo (vinfo),
1854 2086803 : m_costing_for_scalar (costing_for_scalar),
1855 2086803 : m_costs (),
1856 2086803 : m_suggested_unroll_factor(1),
1857 2086803 : m_suggested_epilogue_mode(VOIDmode),
1858 2086803 : m_masked_epilogue (-1),
1859 2086803 : m_finished (false)
1860 : {
1861 : }
1862 :
1863 : /* Return the cost of the prologue code (in abstract units). */
1864 :
1865 : inline unsigned int
1866 1265206 : vector_costs::prologue_cost () const
1867 : {
1868 1265206 : gcc_checking_assert (m_finished);
1869 1265206 : return m_costs[vect_prologue];
1870 : }
1871 :
1872 : /* Return the cost of the body code (in abstract units). */
1873 :
1874 : inline unsigned int
1875 1984332 : vector_costs::body_cost () const
1876 : {
1877 1984332 : gcc_checking_assert (m_finished);
1878 1984332 : return m_costs[vect_body];
1879 : }
1880 :
1881 : /* Return the cost of the epilogue code (in abstract units). */
1882 :
1883 : inline unsigned int
1884 1265206 : vector_costs::epilogue_cost () const
1885 : {
1886 1265206 : gcc_checking_assert (m_finished);
1887 1265206 : return m_costs[vect_epilogue];
1888 : }
1889 :
1890 : /* Return the cost of the prologue and epilogue code (in abstract units). */
1891 :
1892 : inline unsigned int
1893 482988 : vector_costs::outside_cost () const
1894 : {
1895 482988 : return prologue_cost () + epilogue_cost ();
1896 : }
1897 :
1898 : /* Return the cost of the prologue, body and epilogue code
1899 : (in abstract units). */
1900 :
1901 : inline unsigned int
1902 124472 : vector_costs::total_cost () const
1903 : {
1904 124472 : return body_cost () + outside_cost ();
1905 : }
1906 :
1907 : /* Return the suggested unroll factor. */
1908 :
1909 : inline unsigned int
1910 124104 : vector_costs::suggested_unroll_factor () const
1911 : {
1912 124104 : gcc_checking_assert (m_finished);
1913 124104 : return m_suggested_unroll_factor;
1914 : }
1915 :
1916 : /* Return the suggested epilogue mode. */
1917 :
1918 : inline machine_mode
1919 14266 : vector_costs::suggested_epilogue_mode (int &masked_p) const
1920 : {
1921 14266 : gcc_checking_assert (m_finished);
1922 14266 : masked_p = m_masked_epilogue;
1923 14266 : return m_suggested_epilogue_mode;
1924 : }
1925 :
1926 : #define VECT_MAX_COST 1000
1927 :
1928 : /* The maximum number of intermediate steps required in multi-step type
1929 : conversion. */
1930 : #define MAX_INTERM_CVT_STEPS 3
1931 :
1932 : #define MAX_VECTORIZATION_FACTOR INT_MAX
1933 :
1934 : /* Nonzero if TYPE represents a (scalar) boolean type or type
1935 : in the middle-end compatible with it (unsigned precision 1 integral
1936 : types). Used to determine which types should be vectorized as
1937 : VECTOR_BOOLEAN_TYPE_P. */
1938 :
1939 : #define VECT_SCALAR_BOOLEAN_TYPE_P(TYPE) \
1940 : (TREE_CODE (TYPE) == BOOLEAN_TYPE \
1941 : || ((TREE_CODE (TYPE) == INTEGER_TYPE \
1942 : || TREE_CODE (TYPE) == ENUMERAL_TYPE) \
1943 : && TYPE_PRECISION (TYPE) == 1 \
1944 : && TYPE_UNSIGNED (TYPE)))
1945 :
1946 : inline bool
1947 11422193 : nested_in_vect_loop_p (class loop *loop, stmt_vec_info stmt_info)
1948 : {
1949 11422193 : return (loop->inner
1950 9279050 : && (loop->inner == (gimple_bb (stmt_info->stmt))->loop_father));
1951 : }
1952 :
1953 : /* PHI is either a scalar reduction phi or a scalar induction phi.
1954 : Return the initial value of the variable on entry to the containing
1955 : loop. */
1956 :
1957 : inline tree
1958 33842 : vect_phi_initial_value (gphi *phi)
1959 : {
1960 33842 : basic_block bb = gimple_bb (phi);
1961 33842 : edge pe = loop_preheader_edge (bb->loop_father);
1962 33842 : gcc_assert (pe->dest == bb);
1963 33842 : return PHI_ARG_DEF_FROM_EDGE (phi, pe);
1964 : }
1965 :
1966 : /* Return true if STMT_INFO should produce a vector mask type rather than
1967 : a normal nonmask type. */
1968 :
1969 : inline bool
1970 7076980 : vect_use_mask_type_p (stmt_vec_info stmt_info)
1971 : {
1972 7076980 : return stmt_info->mask_precision && stmt_info->mask_precision != ~0U;
1973 : }
1974 :
1975 : /* Return TRUE if a statement represented by STMT_INFO is a part of a
1976 : pattern. */
1977 :
1978 : inline bool
1979 127180196 : is_pattern_stmt_p (stmt_vec_info stmt_info)
1980 : {
1981 81153847 : return stmt_info->pattern_stmt_p;
1982 : }
1983 :
1984 : /* If STMT_INFO is a pattern statement, return the statement that it
1985 : replaces, otherwise return STMT_INFO itself. */
1986 :
1987 : inline stmt_vec_info
1988 50312438 : vect_orig_stmt (stmt_vec_info stmt_info)
1989 : {
1990 37905035 : if (is_pattern_stmt_p (stmt_info))
1991 3430556 : return STMT_VINFO_RELATED_STMT (stmt_info);
1992 : return stmt_info;
1993 : }
1994 :
1995 : /* Return the later statement between STMT1_INFO and STMT2_INFO. */
1996 :
1997 : inline stmt_vec_info
1998 6064605 : get_later_stmt (stmt_vec_info stmt1_info, stmt_vec_info stmt2_info)
1999 : {
2000 6064605 : gimple *stmt1 = vect_orig_stmt (stmt1_info)->stmt;
2001 6064605 : gimple *stmt2 = vect_orig_stmt (stmt2_info)->stmt;
2002 6064605 : if (gimple_bb (stmt1) == gimple_bb (stmt2))
2003 : {
2004 6038988 : if (gimple_uid (stmt1) > gimple_uid (stmt2))
2005 : return stmt1_info;
2006 : else
2007 : return stmt2_info;
2008 : }
2009 : /* ??? We should be really calling this function only with stmts
2010 : in the same BB but we can recover if there's a domination
2011 : relationship between them. */
2012 25617 : else if (dominated_by_p (CDI_DOMINATORS,
2013 25617 : gimple_bb (stmt1), gimple_bb (stmt2)))
2014 : return stmt1_info;
2015 8922 : else if (dominated_by_p (CDI_DOMINATORS,
2016 8922 : gimple_bb (stmt2), gimple_bb (stmt1)))
2017 : return stmt2_info;
2018 0 : gcc_unreachable ();
2019 : }
2020 :
2021 : /* If STMT_INFO has been replaced by a pattern statement, return the
2022 : replacement statement, otherwise return STMT_INFO itself. */
2023 :
2024 : inline stmt_vec_info
2025 51601174 : vect_stmt_to_vectorize (stmt_vec_info stmt_info)
2026 : {
2027 51601174 : if (STMT_VINFO_IN_PATTERN_P (stmt_info))
2028 1547449 : return STMT_VINFO_RELATED_STMT (stmt_info);
2029 : return stmt_info;
2030 : }
2031 :
2032 : /* Return true if BB is a loop header. */
2033 :
2034 : inline bool
2035 1515808 : is_loop_header_bb_p (basic_block bb)
2036 : {
2037 1515808 : if (bb == (bb->loop_father)->header)
2038 1505126 : return true;
2039 :
2040 : return false;
2041 : }
2042 :
2043 : /* Return pow2 (X). */
2044 :
2045 : inline int
2046 : vect_pow2 (int x)
2047 : {
2048 : int i, res = 1;
2049 :
2050 : for (i = 0; i < x; i++)
2051 : res *= 2;
2052 :
2053 : return res;
2054 : }
2055 :
2056 : /* Alias targetm.vectorize.builtin_vectorization_cost. */
2057 :
2058 : inline int
2059 9122185 : builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
2060 : tree vectype, int misalign)
2061 : {
2062 9055038 : return targetm.vectorize.builtin_vectorization_cost (type_of_cost,
2063 : vectype, misalign);
2064 : }
2065 :
2066 : /* Get cost by calling cost target builtin. */
2067 :
2068 : inline
2069 152 : int vect_get_stmt_cost (enum vect_cost_for_stmt type_of_cost)
2070 : {
2071 66995 : return builtin_vectorization_cost (type_of_cost, NULL, 0);
2072 : }
2073 :
2074 : /* Alias targetm.vectorize.init_cost. */
2075 :
2076 : inline vector_costs *
2077 2086803 : init_cost (vec_info *vinfo, bool costing_for_scalar)
2078 : {
2079 2086803 : return targetm.vectorize.create_costs (vinfo, costing_for_scalar);
2080 : }
2081 :
2082 : extern void dump_stmt_cost (FILE *, int, enum vect_cost_for_stmt,
2083 : stmt_vec_info, slp_tree, tree, int, unsigned,
2084 : enum vect_cost_model_location);
2085 :
2086 : /* Dump and add costs. */
2087 :
2088 : inline unsigned
2089 7447795 : add_stmt_cost (vector_costs *costs, int count,
2090 : enum vect_cost_for_stmt kind,
2091 : stmt_vec_info stmt_info, slp_tree node,
2092 : tree vectype, int misalign,
2093 : enum vect_cost_model_location where)
2094 : {
2095 : /* Even though a vector type might be set on stmt do not pass that on when
2096 : costing the scalar IL. A SLP node shouldn't have been recorded. */
2097 7447795 : if (costs->costing_for_scalar ())
2098 : {
2099 3861690 : vectype = NULL_TREE;
2100 3861690 : gcc_checking_assert (node == NULL);
2101 : }
2102 7447795 : unsigned cost = costs->add_stmt_cost (count, kind, stmt_info, node, vectype,
2103 : misalign, where);
2104 7447795 : if (dump_file && (dump_flags & TDF_DETAILS))
2105 218578 : dump_stmt_cost (dump_file, count, kind, stmt_info, node, vectype, misalign,
2106 : cost, where);
2107 7447795 : return cost;
2108 : }
2109 :
2110 : inline unsigned
2111 81866 : add_stmt_cost (vector_costs *costs, int count, enum vect_cost_for_stmt kind,
2112 : enum vect_cost_model_location where)
2113 : {
2114 81866 : gcc_assert (kind == cond_branch_taken || kind == cond_branch_not_taken
2115 : || kind == scalar_stmt);
2116 81866 : return add_stmt_cost (costs, count, kind, NULL, NULL, NULL_TREE, 0, where);
2117 : }
2118 :
2119 : inline unsigned
2120 3834780 : add_stmt_cost (vector_costs *costs, stmt_info_for_cost *i)
2121 : {
2122 3834780 : return add_stmt_cost (costs, i->count, i->kind, i->stmt_info, i->node,
2123 3834780 : i->vectype, i->misalign, i->where);
2124 : }
2125 :
2126 : inline void
2127 642041 : add_stmt_costs (vector_costs *costs, stmt_vector_for_cost *cost_vec)
2128 : {
2129 642041 : stmt_info_for_cost *cost;
2130 642041 : unsigned i;
2131 3860817 : FOR_EACH_VEC_ELT (*cost_vec, i, cost)
2132 3218776 : add_stmt_cost (costs, cost->count, cost->kind, cost->stmt_info,
2133 : cost->node, cost->vectype, cost->misalign, cost->where);
2134 642041 : }
2135 :
2136 : /*-----------------------------------------------------------------*/
2137 : /* Info on data references alignment. */
2138 : /*-----------------------------------------------------------------*/
2139 : #define DR_MISALIGNMENT_UNKNOWN (-1)
2140 : #define DR_MISALIGNMENT_UNINITIALIZED (-2)
2141 :
2142 : inline void
2143 2561891 : set_dr_misalignment (dr_vec_info *dr_info, int val)
2144 : {
2145 2561891 : dr_info->misalignment = val;
2146 : }
2147 :
2148 : extern int dr_misalignment (dr_vec_info *dr_info, tree vectype,
2149 : poly_int64 offset = 0);
2150 :
2151 : #define SET_DR_MISALIGNMENT(DR, VAL) set_dr_misalignment (DR, VAL)
2152 :
2153 : /* Only defined once DR_MISALIGNMENT is defined. */
2154 : inline const poly_uint64
2155 7999700 : dr_target_alignment (dr_vec_info *dr_info)
2156 : {
2157 7999700 : if (STMT_VINFO_GROUPED_ACCESS (dr_info->stmt))
2158 5905013 : dr_info = STMT_VINFO_DR_INFO (DR_GROUP_FIRST_ELEMENT (dr_info->stmt));
2159 7999700 : return dr_info->target_alignment;
2160 : }
2161 : #define DR_TARGET_ALIGNMENT(DR) dr_target_alignment (DR)
2162 : #define DR_SCALAR_KNOWN_BOUNDS(DR) (DR)->scalar_access_known_in_bounds
2163 :
2164 : /* Return if the stmt_vec_info requires peeling for alignment. */
2165 : inline bool
2166 4457034 : dr_safe_speculative_read_required (stmt_vec_info stmt_info)
2167 : {
2168 4457034 : dr_vec_info *dr_info;
2169 4457034 : if (STMT_VINFO_GROUPED_ACCESS (stmt_info))
2170 1663860 : dr_info = STMT_VINFO_DR_INFO (DR_GROUP_FIRST_ELEMENT (stmt_info));
2171 : else
2172 2793174 : dr_info = STMT_VINFO_DR_INFO (stmt_info);
2173 :
2174 4457034 : return dr_info->safe_speculative_read_required;
2175 : }
2176 :
2177 : /* Set the safe_speculative_read_required for the stmt_vec_info, if group
2178 : access then set on the fist element otherwise set on DR directly. */
2179 : inline void
2180 225460 : dr_set_safe_speculative_read_required (stmt_vec_info stmt_info,
2181 : bool requires_alignment)
2182 : {
2183 225460 : dr_vec_info *dr_info;
2184 225460 : if (STMT_VINFO_GROUPED_ACCESS (stmt_info))
2185 67717 : dr_info = STMT_VINFO_DR_INFO (DR_GROUP_FIRST_ELEMENT (stmt_info));
2186 : else
2187 157743 : dr_info = STMT_VINFO_DR_INFO (stmt_info);
2188 :
2189 225460 : dr_info->safe_speculative_read_required = requires_alignment;
2190 225460 : }
2191 :
2192 : inline void
2193 1577343 : set_dr_target_alignment (dr_vec_info *dr_info, poly_uint64 val)
2194 : {
2195 1577343 : dr_info->target_alignment = val;
2196 : }
2197 : #define SET_DR_TARGET_ALIGNMENT(DR, VAL) set_dr_target_alignment (DR, VAL)
2198 :
2199 : /* Return true if data access DR_INFO is aligned to the targets
2200 : preferred alignment for VECTYPE (which may be less than a full vector). */
2201 :
2202 : inline bool
2203 377013 : aligned_access_p (dr_vec_info *dr_info, tree vectype)
2204 : {
2205 377013 : return (dr_misalignment (dr_info, vectype) == 0);
2206 : }
2207 :
2208 : /* Return TRUE if the (mis-)alignment of the data access is known with
2209 : respect to the targets preferred alignment for VECTYPE, and FALSE
2210 : otherwise. */
2211 :
2212 : inline bool
2213 2247248 : known_alignment_for_access_p (dr_vec_info *dr_info, tree vectype)
2214 : {
2215 2011208 : return (dr_misalignment (dr_info, vectype) != DR_MISALIGNMENT_UNKNOWN);
2216 : }
2217 :
2218 : /* Return the minimum alignment in bytes that the vectorized version
2219 : of DR_INFO is guaranteed to have. */
2220 :
2221 : inline unsigned int
2222 273347 : vect_known_alignment_in_bytes (dr_vec_info *dr_info, tree vectype,
2223 : poly_int64 offset = 0)
2224 : {
2225 273347 : int misalignment = dr_misalignment (dr_info, vectype, offset);
2226 273347 : if (misalignment == DR_MISALIGNMENT_UNKNOWN)
2227 133205 : return TYPE_ALIGN_UNIT (TREE_TYPE (DR_REF (dr_info->dr)));
2228 140142 : else if (misalignment == 0)
2229 97655 : return known_alignment (DR_TARGET_ALIGNMENT (dr_info));
2230 42487 : return misalignment & -misalignment;
2231 : }
2232 :
2233 : /* Return the behavior of DR_INFO with respect to the vectorization context
2234 : (which for outer loop vectorization might not be the behavior recorded
2235 : in DR_INFO itself). */
2236 :
2237 : inline innermost_loop_behavior *
2238 5603469 : vect_dr_behavior (vec_info *vinfo, dr_vec_info *dr_info)
2239 : {
2240 5603469 : stmt_vec_info stmt_info = dr_info->stmt;
2241 5603469 : loop_vec_info loop_vinfo = dyn_cast<loop_vec_info> (vinfo);
2242 2150334 : if (loop_vinfo == NULL
2243 2150334 : || !nested_in_vect_loop_p (LOOP_VINFO_LOOP (loop_vinfo), stmt_info))
2244 5599532 : return &DR_INNERMOST (dr_info->dr);
2245 : else
2246 3937 : return &STMT_VINFO_DR_WRT_VEC_LOOP (stmt_info);
2247 : }
2248 :
2249 : /* Return the offset calculated by adding the offset of this DR_INFO to the
2250 : corresponding data_reference's offset. If CHECK_OUTER then use
2251 : vect_dr_behavior to select the appropriate data_reference to use. */
2252 :
2253 : inline tree
2254 733401 : get_dr_vinfo_offset (vec_info *vinfo,
2255 : dr_vec_info *dr_info, bool check_outer = false)
2256 : {
2257 733401 : innermost_loop_behavior *base;
2258 733401 : if (check_outer)
2259 693615 : base = vect_dr_behavior (vinfo, dr_info);
2260 : else
2261 39786 : base = &dr_info->dr->innermost;
2262 :
2263 733401 : tree offset = base->offset;
2264 :
2265 733401 : if (!dr_info->offset)
2266 : return offset;
2267 :
2268 18958 : offset = fold_convert (sizetype, offset);
2269 18958 : return fold_build2 (PLUS_EXPR, TREE_TYPE (dr_info->offset), offset,
2270 : dr_info->offset);
2271 : }
2272 :
2273 :
2274 : /* Return the vect cost model for LOOP. */
2275 : inline enum vect_cost_model
2276 2377073 : loop_cost_model (loop_p loop)
2277 : {
2278 2377073 : if (loop != NULL
2279 1719520 : && loop->force_vectorize
2280 77344 : && flag_simd_cost_model != VECT_COST_MODEL_DEFAULT)
2281 : return flag_simd_cost_model;
2282 2299729 : return flag_vect_cost_model;
2283 : }
2284 :
2285 : /* Return true if the vect cost model is unlimited. */
2286 : inline bool
2287 1650794 : unlimited_cost_model (loop_p loop)
2288 : {
2289 1650794 : return loop_cost_model (loop) == VECT_COST_MODEL_UNLIMITED;
2290 : }
2291 :
2292 : /* Return true if the loop described by LOOP_VINFO is fully-masked and
2293 : if the first iteration should use a partial mask in order to achieve
2294 : alignment. */
2295 :
2296 : inline bool
2297 264538 : vect_use_loop_mask_for_alignment_p (loop_vec_info loop_vinfo)
2298 : {
2299 : /* With early break vectorization we don't know whether the accesses will stay
2300 : inside the loop or not. TODO: The early break adjustment code can be
2301 : implemented the same way as vectorizable_linear_induction. However we
2302 : can't test this today so reject it. */
2303 85 : return (LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
2304 85 : && LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo)
2305 264542 : && !(LOOP_VINFO_NON_LINEAR_IV (loop_vinfo)
2306 0 : && LOOP_VINFO_EARLY_BREAKS (loop_vinfo)));
2307 : }
2308 :
2309 : /* Return the number of vectors of type VECTYPE that are needed to get
2310 : NUNITS elements. NUNITS should be based on the vectorization factor,
2311 : so it is always a known multiple of the number of elements in VECTYPE. */
2312 :
2313 : inline unsigned int
2314 7268395 : vect_get_num_vectors (poly_uint64 nunits, tree vectype)
2315 : {
2316 7268395 : return exact_div (nunits, TYPE_VECTOR_SUBPARTS (vectype)).to_constant ();
2317 : }
2318 :
2319 : /* Return the number of vectors in the context of vectorization region VINFO,
2320 : needed for a group of statements and a vector type as specified by NODE. */
2321 :
2322 : inline unsigned int
2323 7267566 : vect_get_num_copies (vec_info *vinfo, slp_tree node)
2324 : {
2325 7267566 : poly_uint64 vf;
2326 :
2327 7267566 : if (loop_vec_info loop_vinfo = dyn_cast <loop_vec_info> (vinfo))
2328 3305249 : vf = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
2329 : else
2330 : vf = 1;
2331 :
2332 7267566 : vf *= SLP_TREE_LANES (node);
2333 7267566 : tree vectype = SLP_TREE_VECTYPE (node);
2334 :
2335 7267566 : return vect_get_num_vectors (vf, vectype);
2336 : }
2337 :
2338 : /* Update maximum unit count *MAX_NUNITS so that it accounts for
2339 : NUNITS. *MAX_NUNITS can be 1 if we haven't yet recorded anything. */
2340 :
2341 : inline void
2342 9497957 : vect_update_max_nunits (poly_uint64 *max_nunits, poly_uint64 nunits)
2343 : {
2344 : /* All unit counts have the form vec_info::vector_size * X for some
2345 : rational X, so two unit sizes must have a common multiple.
2346 : Everything is a multiple of the initial value of 1. */
2347 4184753 : *max_nunits = force_common_multiple (*max_nunits, nunits);
2348 : }
2349 :
2350 : /* Update maximum unit count *MAX_NUNITS so that it accounts for
2351 : the number of units in vector type VECTYPE. *MAX_NUNITS can be 1
2352 : if we haven't yet recorded any vector types. */
2353 :
2354 : inline void
2355 5313204 : vect_update_max_nunits (poly_uint64 *max_nunits, tree vectype)
2356 : {
2357 5313204 : vect_update_max_nunits (max_nunits, TYPE_VECTOR_SUBPARTS (vectype));
2358 5313204 : }
2359 :
2360 : /* Return the vectorization factor that should be used for costing
2361 : purposes while vectorizing the loop described by LOOP_VINFO.
2362 : Pick a reasonable estimate if the vectorization factor isn't
2363 : known at compile time. */
2364 :
2365 : inline unsigned int
2366 1275150 : vect_vf_for_cost (loop_vec_info loop_vinfo)
2367 : {
2368 1275150 : return estimated_poly_value (LOOP_VINFO_VECT_FACTOR (loop_vinfo));
2369 : }
2370 :
2371 : /* Estimate the number of elements in VEC_TYPE for costing purposes.
2372 : Pick a reasonable estimate if the exact number isn't known at
2373 : compile time. */
2374 :
2375 : inline unsigned int
2376 31285 : vect_nunits_for_cost (tree vec_type)
2377 : {
2378 31285 : return estimated_poly_value (TYPE_VECTOR_SUBPARTS (vec_type));
2379 : }
2380 :
2381 : /* Return the maximum possible vectorization factor for LOOP_VINFO. */
2382 :
2383 : inline unsigned HOST_WIDE_INT
2384 105598 : vect_max_vf (loop_vec_info loop_vinfo)
2385 : {
2386 105598 : unsigned HOST_WIDE_INT vf;
2387 105598 : if (LOOP_VINFO_VECT_FACTOR (loop_vinfo).is_constant (&vf))
2388 105598 : return vf;
2389 : return MAX_VECTORIZATION_FACTOR;
2390 : }
2391 :
2392 : /* Return the size of the value accessed by unvectorized data reference
2393 : DR_INFO. This is only valid once STMT_VINFO_VECTYPE has been calculated
2394 : for the associated gimple statement, since that guarantees that DR_INFO
2395 : accesses either a scalar or a scalar equivalent. ("Scalar equivalent"
2396 : here includes things like V1SI, which can be vectorized in the same way
2397 : as a plain SI.) */
2398 :
2399 : inline unsigned int
2400 1950308 : vect_get_scalar_dr_size (dr_vec_info *dr_info)
2401 : {
2402 1950308 : return tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (DR_REF (dr_info->dr))));
2403 : }
2404 :
2405 : /* Return true if LOOP_VINFO requires a runtime check for whether the
2406 : vector loop is profitable. */
2407 :
2408 : inline bool
2409 71005 : vect_apply_runtime_profitability_check_p (loop_vec_info loop_vinfo)
2410 : {
2411 71005 : unsigned int th = LOOP_VINFO_COST_MODEL_THRESHOLD (loop_vinfo);
2412 37492 : return (!LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo)
2413 71005 : && th >= vect_vf_for_cost (loop_vinfo));
2414 : }
2415 :
2416 : /* Return true if CODE is a lane-reducing opcode. */
2417 :
2418 : inline bool
2419 381193 : lane_reducing_op_p (code_helper code)
2420 : {
2421 381193 : return code == DOT_PROD_EXPR || code == WIDEN_SUM_EXPR || code == SAD_EXPR;
2422 : }
2423 :
2424 : /* Return true if STMT is a lane-reducing statement. */
2425 :
2426 : inline bool
2427 459804 : lane_reducing_stmt_p (gimple *stmt)
2428 : {
2429 459804 : if (auto *assign = dyn_cast <gassign *> (stmt))
2430 318534 : return lane_reducing_op_p (gimple_assign_rhs_code (assign));
2431 : return false;
2432 : }
2433 :
2434 : /* Source location + hotness information. */
2435 : extern dump_user_location_t vect_location;
2436 :
2437 : /* A macro for calling:
2438 : dump_begin_scope (MSG, vect_location);
2439 : via an RAII object, thus printing "=== MSG ===\n" to the dumpfile etc,
2440 : and then calling
2441 : dump_end_scope ();
2442 : once the object goes out of scope, thus capturing the nesting of
2443 : the scopes.
2444 :
2445 : These scopes affect dump messages within them: dump messages at the
2446 : top level implicitly default to MSG_PRIORITY_USER_FACING, whereas those
2447 : in a nested scope implicitly default to MSG_PRIORITY_INTERNALS. */
2448 :
2449 : #define DUMP_VECT_SCOPE(MSG) \
2450 : AUTO_DUMP_SCOPE (MSG, vect_location)
2451 :
2452 : /* A sentinel class for ensuring that the "vect_location" global gets
2453 : reset at the end of a scope.
2454 :
2455 : The "vect_location" global is used during dumping and contains a
2456 : location_t, which could contain references to a tree block via the
2457 : ad-hoc data. This data is used for tracking inlining information,
2458 : but it's not a GC root; it's simply assumed that such locations never
2459 : get accessed if the blocks are optimized away.
2460 :
2461 : Hence we need to ensure that such locations are purged at the end
2462 : of any operations using them (e.g. via this class). */
2463 :
2464 : class auto_purge_vect_location
2465 : {
2466 : public:
2467 : ~auto_purge_vect_location ();
2468 : };
2469 :
2470 : /*-----------------------------------------------------------------*/
2471 : /* Function prototypes. */
2472 : /*-----------------------------------------------------------------*/
2473 :
2474 : /* Simple loop peeling and versioning utilities for vectorizer's purposes -
2475 : in tree-vect-loop-manip.cc. */
2476 : extern void vect_set_loop_condition (class loop *, edge, loop_vec_info,
2477 : tree, tree, tree, bool);
2478 : extern bool slpeel_can_duplicate_loop_p (const class loop *, const_edge,
2479 : const_edge);
2480 : class loop *slpeel_tree_duplicate_loop_to_edge_cfg (class loop *, edge,
2481 : class loop *, edge,
2482 : edge, edge *, bool = true,
2483 : vec<basic_block> * = NULL,
2484 : bool = false, bool = false);
2485 : class loop *vect_loop_versioning (loop_vec_info, gimple *);
2486 : extern class loop *vect_do_peeling (loop_vec_info, tree, tree,
2487 : tree *, tree *, tree *, int, bool, bool,
2488 : tree *);
2489 : extern tree vect_get_main_loop_result (loop_vec_info, tree, tree);
2490 : extern void vect_prepare_for_masked_peels (loop_vec_info);
2491 : extern dump_user_location_t find_loop_location (class loop *);
2492 : extern bool vect_can_advance_ivs_p (loop_vec_info);
2493 : extern void vect_update_inits_of_drs (loop_vec_info, tree, tree_code);
2494 : extern edge vec_init_loop_exit_info (class loop *);
2495 : extern void vect_iv_increment_position (edge, gimple_stmt_iterator *, bool *);
2496 :
2497 : /* In tree-vect-stmts.cc. */
2498 : extern tree get_related_vectype_for_scalar_type (machine_mode, tree,
2499 : poly_uint64 = 0);
2500 : extern tree get_vectype_for_scalar_type (vec_info *, tree, unsigned int = 0);
2501 : extern tree get_vectype_for_scalar_type (vec_info *, tree, slp_tree);
2502 : extern tree get_mask_type_for_scalar_type (vec_info *, tree, unsigned int = 0);
2503 : extern tree get_mask_type_for_scalar_type (vec_info *, tree, slp_tree);
2504 : extern tree get_same_sized_vectype (tree, tree);
2505 : extern bool vect_chooses_same_modes_p (vec_info *, machine_mode);
2506 : extern bool vect_chooses_same_modes_p (machine_mode, machine_mode);
2507 : extern bool vect_get_loop_mask_type (loop_vec_info);
2508 : extern bool vect_is_simple_use (tree, vec_info *, enum vect_def_type *,
2509 : stmt_vec_info * = NULL, gimple ** = NULL);
2510 : extern bool vect_is_simple_use (vec_info *, slp_tree,
2511 : unsigned, tree *, slp_tree *,
2512 : enum vect_def_type *,
2513 : tree *, stmt_vec_info * = NULL);
2514 : extern bool vect_maybe_update_slp_op_vectype (slp_tree, tree);
2515 : extern tree perm_mask_for_reverse (tree);
2516 : extern bool supportable_widening_operation (code_helper, tree, tree, bool,
2517 : code_helper*, code_helper*,
2518 : int*, vec<tree> *);
2519 : extern bool supportable_narrowing_operation (code_helper, tree, tree,
2520 : code_helper *, int *,
2521 : vec<tree> *);
2522 : extern bool supportable_indirect_convert_operation (code_helper,
2523 : tree, tree,
2524 : vec<std::pair<tree, tree_code> > &,
2525 : tree = NULL_TREE,
2526 : slp_tree = NULL);
2527 : extern int compare_step_with_zero (vec_info *, stmt_vec_info);
2528 :
2529 : extern unsigned record_stmt_cost (stmt_vector_for_cost *, int,
2530 : enum vect_cost_for_stmt, stmt_vec_info,
2531 : tree, int, enum vect_cost_model_location);
2532 : extern unsigned record_stmt_cost (stmt_vector_for_cost *, int,
2533 : enum vect_cost_for_stmt, slp_tree,
2534 : tree, int, enum vect_cost_model_location);
2535 : extern unsigned record_stmt_cost (stmt_vector_for_cost *, int,
2536 : enum vect_cost_for_stmt,
2537 : enum vect_cost_model_location);
2538 : extern unsigned record_stmt_cost (stmt_vector_for_cost *, int,
2539 : enum vect_cost_for_stmt, stmt_vec_info,
2540 : slp_tree, tree, int,
2541 : enum vect_cost_model_location);
2542 :
2543 : /* Overload of record_stmt_cost with VECTYPE derived from STMT_INFO. */
2544 :
2545 : inline unsigned
2546 1771387 : record_stmt_cost (stmt_vector_for_cost *body_cost_vec, int count,
2547 : enum vect_cost_for_stmt kind, stmt_vec_info stmt_info,
2548 : int misalign, enum vect_cost_model_location where)
2549 : {
2550 1770858 : return record_stmt_cost (body_cost_vec, count, kind, stmt_info,
2551 1770858 : STMT_VINFO_VECTYPE (stmt_info), misalign, where);
2552 : }
2553 :
2554 : /* Overload of record_stmt_cost with VECTYPE derived from SLP node. */
2555 :
2556 : inline unsigned
2557 1638827 : record_stmt_cost (stmt_vector_for_cost *body_cost_vec, int count,
2558 : enum vect_cost_for_stmt kind, slp_tree node,
2559 : int misalign, enum vect_cost_model_location where)
2560 : {
2561 1436630 : return record_stmt_cost (body_cost_vec, count, kind, node,
2562 68830 : SLP_TREE_VECTYPE (node), misalign, where);
2563 : }
2564 :
2565 : extern void vect_finish_replace_stmt (vec_info *, stmt_vec_info, gimple *);
2566 : extern void vect_finish_stmt_generation (vec_info *, stmt_vec_info, gimple *,
2567 : gimple_stmt_iterator *);
2568 : extern opt_result vect_mark_stmts_to_be_vectorized (loop_vec_info, bool *);
2569 : extern tree vect_get_store_rhs (stmt_vec_info);
2570 : void vect_get_vec_defs (vec_info *, slp_tree,
2571 : tree, vec<tree> *,
2572 : tree = NULL, vec<tree> * = NULL,
2573 : tree = NULL, vec<tree> * = NULL,
2574 : tree = NULL, vec<tree> * = NULL);
2575 : extern tree vect_init_vector (vec_info *, stmt_vec_info, tree, tree,
2576 : gimple_stmt_iterator *);
2577 : extern tree vect_get_slp_vect_def (slp_tree, unsigned);
2578 : extern bool vect_transform_stmt (vec_info *, stmt_vec_info,
2579 : gimple_stmt_iterator *,
2580 : slp_tree, slp_instance);
2581 : extern void vect_remove_stores (vec_info *, stmt_vec_info);
2582 : extern bool vect_nop_conversion_p (stmt_vec_info);
2583 : extern opt_result vect_analyze_stmt (vec_info *, slp_tree,
2584 : slp_instance, stmt_vector_for_cost *);
2585 : extern void vect_get_load_cost (vec_info *, stmt_vec_info, slp_tree, int,
2586 : dr_alignment_support, int, bool,
2587 : unsigned int *, unsigned int *,
2588 : stmt_vector_for_cost *,
2589 : stmt_vector_for_cost *, bool);
2590 : extern void vect_get_store_cost (vec_info *, stmt_vec_info, slp_tree, int,
2591 : dr_alignment_support, int,
2592 : unsigned int *, stmt_vector_for_cost *);
2593 : extern bool vect_supportable_shift (vec_info *, enum tree_code, tree);
2594 : extern tree vect_gen_perm_mask_any (tree, const vec_perm_indices &);
2595 : extern tree vect_gen_perm_mask_checked (tree, const vec_perm_indices &);
2596 : extern void optimize_mask_stores (class loop*);
2597 : extern tree vect_gen_while (gimple_seq *, tree, tree, tree,
2598 : const char * = nullptr);
2599 : extern tree vect_gen_while_not (gimple_seq *, tree, tree, tree);
2600 : extern opt_result vect_get_vector_types_for_stmt (vec_info *,
2601 : stmt_vec_info, tree *,
2602 : tree *, unsigned int = 0);
2603 : extern opt_tree vect_get_mask_type_for_stmt (stmt_vec_info, unsigned int = 0);
2604 :
2605 : /* In tree-if-conv.cc. */
2606 : extern bool ref_within_array_bound (gimple *, tree);
2607 :
2608 : /* In tree-vect-data-refs.cc. */
2609 : extern bool vect_can_force_dr_alignment_p (const_tree, poly_uint64);
2610 : extern enum dr_alignment_support vect_supportable_dr_alignment
2611 : (vec_info *, dr_vec_info *, tree, int,
2612 : bool = false);
2613 : extern tree vect_get_smallest_scalar_type (stmt_vec_info, tree);
2614 : extern opt_result vect_analyze_data_ref_dependences (loop_vec_info, unsigned int *);
2615 : extern bool vect_slp_analyze_instance_dependence (vec_info *, slp_instance);
2616 : extern opt_result vect_enhance_data_refs_alignment (loop_vec_info);
2617 : extern void vect_analyze_data_refs_alignment (loop_vec_info);
2618 : extern bool vect_slp_analyze_instance_alignment (vec_info *, slp_instance);
2619 : extern opt_result vect_analyze_data_ref_accesses (vec_info *, vec<int> *);
2620 : extern opt_result vect_prune_runtime_alias_test_list (loop_vec_info);
2621 : extern bool vect_gather_scatter_fn_p (vec_info *, bool, bool, tree, tree,
2622 : tree, int, int *, internal_fn *, tree *,
2623 : tree *, vec<int> * = nullptr);
2624 : extern bool vect_check_gather_scatter (stmt_vec_info, tree,
2625 : loop_vec_info, gather_scatter_info *,
2626 : vec<int> * = nullptr);
2627 : extern void vect_describe_gather_scatter_call (stmt_vec_info,
2628 : gather_scatter_info *);
2629 : extern opt_result vect_find_stmt_data_reference (loop_p, gimple *,
2630 : vec<data_reference_p> *,
2631 : vec<int> *, int);
2632 : extern opt_result vect_analyze_data_refs (vec_info *, bool *);
2633 : extern void vect_record_base_alignments (vec_info *);
2634 : extern tree vect_create_data_ref_ptr (vec_info *,
2635 : stmt_vec_info, tree, class loop *, tree,
2636 : tree *, gimple_stmt_iterator *,
2637 : gimple **, bool,
2638 : tree = NULL_TREE);
2639 : extern tree bump_vector_ptr (vec_info *, tree, gimple *, gimple_stmt_iterator *,
2640 : stmt_vec_info, tree);
2641 : extern void vect_copy_ref_info (tree, tree);
2642 : extern tree vect_create_destination_var (tree, tree);
2643 : extern bool vect_grouped_store_supported (tree, unsigned HOST_WIDE_INT);
2644 : extern internal_fn vect_store_lanes_supported (tree, unsigned HOST_WIDE_INT, bool);
2645 : extern bool vect_grouped_load_supported (tree, bool, unsigned HOST_WIDE_INT);
2646 : extern internal_fn vect_load_lanes_supported (tree, unsigned HOST_WIDE_INT,
2647 : bool, vec<int> * = nullptr);
2648 : extern tree vect_setup_realignment (vec_info *,
2649 : stmt_vec_info, tree, gimple_stmt_iterator *,
2650 : tree *, enum dr_alignment_support, tree,
2651 : class loop **);
2652 : extern tree vect_get_new_vect_var (tree, enum vect_var_kind, const char *);
2653 : extern tree vect_get_new_ssa_name (tree, enum vect_var_kind,
2654 : const char * = NULL);
2655 : extern tree vect_create_addr_base_for_vector_ref (vec_info *,
2656 : stmt_vec_info, gimple_seq *,
2657 : tree);
2658 :
2659 : /* In tree-vect-loop.cc. */
2660 : extern tree neutral_op_for_reduction (tree, code_helper, tree, bool = true);
2661 : extern widest_int vect_iv_limit_for_partial_vectors (loop_vec_info loop_vinfo);
2662 : bool vect_rgroup_iv_might_wrap_p (loop_vec_info, rgroup_controls *);
2663 : /* Used in gimple-loop-interchange.c and tree-parloops.cc. */
2664 : extern bool check_reduction_path (dump_user_location_t, loop_p, gphi *, tree,
2665 : enum tree_code);
2666 : extern bool needs_fold_left_reduction_p (tree, code_helper);
2667 : /* Drive for loop analysis stage. */
2668 : extern opt_loop_vec_info vect_analyze_loop (class loop *, gimple *,
2669 : vec_info_shared *);
2670 : extern tree vect_build_loop_niters (loop_vec_info, bool * = NULL);
2671 : extern void vect_gen_vector_loop_niters (loop_vec_info, tree, tree *,
2672 : tree *, bool);
2673 : extern tree vect_halve_mask_nunits (tree, machine_mode);
2674 : extern tree vect_double_mask_nunits (tree, machine_mode);
2675 : extern void vect_record_loop_mask (loop_vec_info, vec_loop_masks *,
2676 : unsigned int, tree, tree);
2677 : extern tree vect_get_loop_mask (loop_vec_info, gimple_stmt_iterator *,
2678 : vec_loop_masks *,
2679 : unsigned int, tree, unsigned int);
2680 : extern void vect_record_loop_len (loop_vec_info, vec_loop_lens *, unsigned int,
2681 : tree, unsigned int);
2682 : extern tree vect_get_loop_len (loop_vec_info, gimple_stmt_iterator *,
2683 : vec_loop_lens *, unsigned int, tree,
2684 : unsigned int, unsigned int, bool);
2685 : extern tree vect_gen_loop_len_mask (loop_vec_info, gimple_stmt_iterator *,
2686 : gimple_stmt_iterator *, vec_loop_lens *,
2687 : unsigned int, tree, tree, unsigned int,
2688 : unsigned int);
2689 : extern gimple_seq vect_gen_len (tree, tree, tree, tree);
2690 : extern vect_reduc_info info_for_reduction (loop_vec_info, slp_tree);
2691 : extern bool reduction_fn_for_scalar_code (code_helper, internal_fn *);
2692 : extern unsigned vect_min_prec_for_max_niters (loop_vec_info, unsigned int);
2693 : /* Drive for loop transformation stage. */
2694 : extern class loop *vect_transform_loop (loop_vec_info, gimple *);
2695 907048 : struct vect_loop_form_info
2696 : {
2697 : tree number_of_iterations;
2698 : tree number_of_iterationsm1;
2699 : tree assumptions;
2700 : auto_vec<gcond *> conds;
2701 : gcond *inner_loop_cond;
2702 : edge loop_exit;
2703 : };
2704 : extern opt_result vect_analyze_loop_form (class loop *, gimple *,
2705 : vect_loop_form_info *);
2706 : extern loop_vec_info vect_create_loop_vinfo (class loop *, vec_info_shared *,
2707 : const vect_loop_form_info *,
2708 : loop_vec_info = nullptr);
2709 : extern bool vectorizable_live_operation (vec_info *, stmt_vec_info,
2710 : slp_tree, slp_instance, int,
2711 : bool, stmt_vector_for_cost *);
2712 : extern bool vectorizable_lane_reducing (loop_vec_info, stmt_vec_info,
2713 : slp_tree, stmt_vector_for_cost *);
2714 : extern bool vectorizable_reduction (loop_vec_info, stmt_vec_info,
2715 : slp_tree, slp_instance,
2716 : stmt_vector_for_cost *);
2717 : extern bool vectorizable_induction (loop_vec_info, stmt_vec_info,
2718 : slp_tree, stmt_vector_for_cost *);
2719 : extern bool vect_transform_reduction (loop_vec_info, stmt_vec_info,
2720 : gimple_stmt_iterator *,
2721 : slp_tree);
2722 : extern bool vect_transform_cycle_phi (loop_vec_info, stmt_vec_info,
2723 : slp_tree, slp_instance);
2724 : extern bool vectorizable_lc_phi (loop_vec_info, stmt_vec_info, slp_tree);
2725 : extern bool vect_transform_lc_phi (loop_vec_info, stmt_vec_info, slp_tree);
2726 : extern bool vectorizable_phi (bb_vec_info, stmt_vec_info, slp_tree,
2727 : stmt_vector_for_cost *);
2728 : extern bool vectorizable_recurr (loop_vec_info, stmt_vec_info,
2729 : slp_tree, stmt_vector_for_cost *);
2730 : extern bool vectorizable_early_exit (loop_vec_info, stmt_vec_info,
2731 : gimple_stmt_iterator *,
2732 : slp_tree, stmt_vector_for_cost *);
2733 : extern bool vect_emulated_vector_p (tree);
2734 : extern bool vect_can_vectorize_without_simd_p (tree_code);
2735 : extern bool vect_can_vectorize_without_simd_p (code_helper);
2736 : extern int vect_get_known_peeling_cost (loop_vec_info, int);
2737 : extern tree cse_and_gimplify_to_preheader (loop_vec_info, tree);
2738 :
2739 : /* Nonlinear induction. */
2740 : extern tree vect_peel_nonlinear_iv_init (gimple_seq*, tree, tree,
2741 : tree, enum vect_induction_op_type,
2742 : bool);
2743 :
2744 : /* In tree-vect-slp.cc. */
2745 : extern void vect_slp_init (void);
2746 : extern void vect_slp_fini (void);
2747 : extern void vect_free_slp_instance (slp_instance);
2748 : extern bool vect_transform_slp_perm_load (vec_info *, slp_tree, const vec<tree> &,
2749 : gimple_stmt_iterator *, poly_uint64,
2750 : bool, unsigned *,
2751 : unsigned * = nullptr, bool = false);
2752 : extern bool vectorizable_slp_permutation (vec_info *, gimple_stmt_iterator *,
2753 : slp_tree, stmt_vector_for_cost *);
2754 : extern bool vect_slp_analyze_operations (vec_info *);
2755 : extern void vect_schedule_slp (vec_info *, const vec<slp_instance> &);
2756 : extern opt_result vect_analyze_slp (vec_info *, unsigned, bool);
2757 : extern bool vect_make_slp_decision (loop_vec_info);
2758 : extern bool vect_detect_hybrid_slp (loop_vec_info);
2759 : extern void vect_optimize_slp (vec_info *);
2760 : extern void vect_gather_slp_loads (vec_info *);
2761 : extern tree vect_get_slp_scalar_def (slp_tree, unsigned);
2762 : extern void vect_get_slp_defs (slp_tree, vec<tree> *);
2763 : extern void vect_get_slp_defs (vec_info *, slp_tree, vec<vec<tree> > *,
2764 : unsigned n = -1U);
2765 : extern bool vect_slp_if_converted_bb (basic_block bb, loop_p orig_loop);
2766 : extern bool vect_slp_function (function *);
2767 : extern stmt_vec_info vect_find_last_scalar_stmt_in_slp (slp_tree);
2768 : extern stmt_vec_info vect_find_first_scalar_stmt_in_slp (slp_tree);
2769 : extern bool is_simple_and_all_uses_invariant (stmt_vec_info, loop_vec_info);
2770 : extern bool can_duplicate_and_interleave_p (vec_info *, unsigned int, tree,
2771 : unsigned int * = NULL,
2772 : tree * = NULL, tree * = NULL);
2773 : extern void duplicate_and_interleave (vec_info *, gimple_seq *, tree,
2774 : const vec<tree> &, unsigned int, vec<tree> &);
2775 : extern int vect_get_place_in_interleaving_chain (stmt_vec_info, stmt_vec_info);
2776 : extern slp_tree vect_create_new_slp_node (unsigned, tree_code);
2777 : extern void vect_free_slp_tree (slp_tree);
2778 : extern bool compatible_calls_p (gcall *, gcall *, bool);
2779 : extern int vect_slp_child_index_for_operand (const stmt_vec_info, int op);
2780 :
2781 : extern tree prepare_vec_mask (loop_vec_info, tree, tree, tree,
2782 : gimple_stmt_iterator *);
2783 : extern tree vect_get_mask_load_else (int, tree);
2784 : extern bool vect_load_perm_consecutive_p (slp_tree, unsigned = UINT_MAX);
2785 :
2786 : /* In tree-vect-patterns.cc. */
2787 : extern void
2788 : vect_mark_pattern_stmts (vec_info *, stmt_vec_info, gimple *, tree);
2789 : extern bool vect_get_range_info (tree, wide_int*, wide_int*);
2790 :
2791 : /* Pattern recognition functions.
2792 : Additional pattern recognition functions can (and will) be added
2793 : in the future. */
2794 : void vect_pattern_recog (vec_info *);
2795 :
2796 : /* In tree-vectorizer.cc. */
2797 : unsigned vectorize_loops (void);
2798 : void vect_free_loop_info_assumptions (class loop *);
2799 : gimple *vect_loop_vectorized_call (class loop *, gcond **cond = NULL);
2800 : bool vect_stmt_dominates_stmt_p (gimple *, gimple *);
2801 :
2802 : /* SLP Pattern matcher types, tree-vect-slp-patterns.cc. */
2803 :
2804 : /* Forward declaration of possible two operands operation that can be matched
2805 : by the complex numbers pattern matchers. */
2806 : enum _complex_operation : unsigned;
2807 :
2808 : /* All possible load permute values that could result from the partial data-flow
2809 : analysis. */
2810 : typedef enum _complex_perm_kinds {
2811 : PERM_UNKNOWN,
2812 : PERM_EVENODD,
2813 : PERM_ODDEVEN,
2814 : PERM_ODDODD,
2815 : PERM_EVENEVEN,
2816 : /* Can be combined with any other PERM values. */
2817 : PERM_TOP
2818 : } complex_perm_kinds_t;
2819 :
2820 : /* Cache from nodes to the load permutation they represent. */
2821 : typedef hash_map <slp_tree, complex_perm_kinds_t>
2822 : slp_tree_to_load_perm_map_t;
2823 :
2824 : /* Cache from nodes pair to being compatible or not. */
2825 : typedef pair_hash <nofree_ptr_hash <_slp_tree>,
2826 : nofree_ptr_hash <_slp_tree>> slp_node_hash;
2827 : typedef hash_map <slp_node_hash, bool> slp_compat_nodes_map_t;
2828 :
2829 :
2830 : /* Vector pattern matcher base class. All SLP pattern matchers must inherit
2831 : from this type. */
2832 :
2833 : class vect_pattern
2834 : {
2835 : protected:
2836 : /* The number of arguments that the IFN requires. */
2837 : unsigned m_num_args;
2838 :
2839 : /* The internal function that will be used when a pattern is created. */
2840 : internal_fn m_ifn;
2841 :
2842 : /* The current node being inspected. */
2843 : slp_tree *m_node;
2844 :
2845 : /* The list of operands to be the children for the node produced when the
2846 : internal function is created. */
2847 : vec<slp_tree> m_ops;
2848 :
2849 : /* Default constructor where NODE is the root of the tree to inspect. */
2850 1171 : vect_pattern (slp_tree *node, vec<slp_tree> *m_ops, internal_fn ifn)
2851 1171 : {
2852 1171 : this->m_ifn = ifn;
2853 1171 : this->m_node = node;
2854 1171 : this->m_ops.create (0);
2855 1171 : if (m_ops)
2856 32 : this->m_ops.safe_splice (*m_ops);
2857 : }
2858 :
2859 : public:
2860 :
2861 : /* Create a new instance of the pattern matcher class of the given type. */
2862 : static vect_pattern* recognize (slp_tree_to_load_perm_map_t *,
2863 : slp_compat_nodes_map_t *, slp_tree *);
2864 :
2865 : /* Build the pattern from the data collected so far. */
2866 : virtual void build (vec_info *) = 0;
2867 :
2868 : /* Default destructor. */
2869 : virtual ~vect_pattern ()
2870 : {
2871 : this->m_ops.release ();
2872 : }
2873 : };
2874 :
2875 : /* Function pointer to create a new pattern matcher from a generic type. */
2876 : typedef vect_pattern* (*vect_pattern_decl_t) (slp_tree_to_load_perm_map_t *,
2877 : slp_compat_nodes_map_t *,
2878 : slp_tree *);
2879 :
2880 : /* List of supported pattern matchers. */
2881 : extern vect_pattern_decl_t slp_patterns[];
2882 :
2883 : /* Number of supported pattern matchers. */
2884 : extern size_t num__slp_patterns;
2885 :
2886 : /* ----------------------------------------------------------------------
2887 : Target support routines
2888 : -----------------------------------------------------------------------
2889 : The following routines are provided to simplify costing decisions in
2890 : target code. Please add more as needed. */
2891 :
2892 : /* Return true if an operaton of kind KIND for STMT_INFO represents
2893 : the extraction of an element from a vector in preparation for
2894 : storing the element to memory. */
2895 : inline bool
2896 : vect_is_store_elt_extraction (vect_cost_for_stmt kind, stmt_vec_info stmt_info)
2897 : {
2898 : return (kind == vec_to_scalar
2899 : && STMT_VINFO_DATA_REF (stmt_info)
2900 : && DR_IS_WRITE (STMT_VINFO_DATA_REF (stmt_info)));
2901 : }
2902 :
2903 : /* Return true if STMT_INFO represents part of a reduction. */
2904 : inline bool
2905 47129752 : vect_is_reduction (stmt_vec_info stmt_info)
2906 : {
2907 47129752 : return STMT_VINFO_REDUC_IDX (stmt_info) != -1;
2908 : }
2909 :
2910 : /* Return true if SLP_NODE represents part of a reduction. */
2911 : inline bool
2912 259740 : vect_is_reduction (slp_tree slp_node)
2913 : {
2914 259740 : return SLP_TREE_REDUC_IDX (slp_node) != -1;
2915 : }
2916 :
2917 : /* If STMT_INFO describes a reduction, return the vect_reduction_type
2918 : of the reduction it describes, otherwise return -1. */
2919 : inline int
2920 40 : vect_reduc_type (vec_info *vinfo, slp_tree node)
2921 : {
2922 40 : if (loop_vec_info loop_vinfo = dyn_cast<loop_vec_info> (vinfo))
2923 : {
2924 40 : vect_reduc_info reduc_info = info_for_reduction (loop_vinfo, node);
2925 40 : if (reduc_info)
2926 40 : return int (VECT_REDUC_INFO_TYPE (reduc_info));
2927 : }
2928 : return -1;
2929 : }
2930 :
2931 : /* If STMT_INFO is a COND_EXPR that includes an embedded comparison, return the
2932 : scalar type of the values being compared. Return null otherwise. */
2933 : inline tree
2934 : vect_embedded_comparison_type (stmt_vec_info stmt_info)
2935 : {
2936 : if (auto *assign = dyn_cast<gassign *> (stmt_info->stmt))
2937 : if (gimple_assign_rhs_code (assign) == COND_EXPR)
2938 : {
2939 : tree cond = gimple_assign_rhs1 (assign);
2940 : if (COMPARISON_CLASS_P (cond))
2941 : return TREE_TYPE (TREE_OPERAND (cond, 0));
2942 : }
2943 : return NULL_TREE;
2944 : }
2945 :
2946 : /* If STMT_INFO is a comparison or contains an embedded comparison, return the
2947 : scalar type of the values being compared. Return null otherwise. */
2948 : inline tree
2949 : vect_comparison_type (stmt_vec_info stmt_info)
2950 : {
2951 : if (auto *assign = dyn_cast<gassign *> (stmt_info->stmt))
2952 : if (TREE_CODE_CLASS (gimple_assign_rhs_code (assign)) == tcc_comparison)
2953 : return TREE_TYPE (gimple_assign_rhs1 (assign));
2954 : return vect_embedded_comparison_type (stmt_info);
2955 : }
2956 :
2957 : /* Return true if STMT_INFO extends the result of a load. */
2958 : inline bool
2959 : vect_is_extending_load (class vec_info *vinfo, stmt_vec_info stmt_info)
2960 : {
2961 : /* Although this is quite large for an inline function, this part
2962 : at least should be inline. */
2963 : gassign *assign = dyn_cast <gassign *> (stmt_info->stmt);
2964 : if (!assign || !CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (assign)))
2965 : return false;
2966 :
2967 : tree rhs = gimple_assign_rhs1 (stmt_info->stmt);
2968 : tree lhs_type = TREE_TYPE (gimple_assign_lhs (assign));
2969 : tree rhs_type = TREE_TYPE (rhs);
2970 : if (!INTEGRAL_TYPE_P (lhs_type)
2971 : || !INTEGRAL_TYPE_P (rhs_type)
2972 : || TYPE_PRECISION (lhs_type) <= TYPE_PRECISION (rhs_type))
2973 : return false;
2974 :
2975 : stmt_vec_info def_stmt_info = vinfo->lookup_def (rhs);
2976 : return (def_stmt_info
2977 : && STMT_VINFO_DATA_REF (def_stmt_info)
2978 : && DR_IS_READ (STMT_VINFO_DATA_REF (def_stmt_info)));
2979 : }
2980 :
2981 : /* Return true if STMT_INFO is an integer truncation. */
2982 : inline bool
2983 : vect_is_integer_truncation (stmt_vec_info stmt_info)
2984 : {
2985 : gassign *assign = dyn_cast <gassign *> (stmt_info->stmt);
2986 : if (!assign || !CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (assign)))
2987 : return false;
2988 :
2989 : tree lhs_type = TREE_TYPE (gimple_assign_lhs (assign));
2990 : tree rhs_type = TREE_TYPE (gimple_assign_rhs1 (assign));
2991 : return (INTEGRAL_TYPE_P (lhs_type)
2992 : && INTEGRAL_TYPE_P (rhs_type)
2993 : && TYPE_PRECISION (lhs_type) < TYPE_PRECISION (rhs_type));
2994 : }
2995 :
2996 : /* Build a GIMPLE_ASSIGN or GIMPLE_CALL with the tree_code,
2997 : or internal_fn contained in ch, respectively. */
2998 : gimple * vect_gimple_build (tree, code_helper, tree, tree = NULL_TREE);
2999 : #endif /* GCC_TREE_VECTORIZER_H */
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