1 /* SLP - Basic Block Vectorization
2 Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4 Contributed by Dorit Naishlos <dorit@il.ibm.com>
5 and Ira Rosen <irar@il.ibm.com>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
30 #include "basic-block.h"
31 #include "diagnostic.h"
32 #include "tree-flow.h"
33 #include "tree-dump.h"
35 #include "cfglayout.h"
39 #include "tree-vectorizer.h"
41 /* Extract the location of the basic block in the source code.
42 Return the basic block location if succeed and NULL if not. */
45 find_bb_location (basic_block bb)
48 gimple_stmt_iterator si;
53 for (si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&si))
56 if (gimple_location (stmt) != UNKNOWN_LOC)
57 return gimple_location (stmt);
64 /* Recursively free the memory allocated for the SLP tree rooted at NODE. */
67 vect_free_slp_tree (slp_tree node)
72 if (SLP_TREE_LEFT (node))
73 vect_free_slp_tree (SLP_TREE_LEFT (node));
75 if (SLP_TREE_RIGHT (node))
76 vect_free_slp_tree (SLP_TREE_RIGHT (node));
78 VEC_free (gimple, heap, SLP_TREE_SCALAR_STMTS (node));
80 if (SLP_TREE_VEC_STMTS (node))
81 VEC_free (gimple, heap, SLP_TREE_VEC_STMTS (node));
87 /* Free the memory allocated for the SLP instance. */
90 vect_free_slp_instance (slp_instance instance)
92 vect_free_slp_tree (SLP_INSTANCE_TREE (instance));
93 VEC_free (int, heap, SLP_INSTANCE_LOAD_PERMUTATION (instance));
94 VEC_free (slp_tree, heap, SLP_INSTANCE_LOADS (instance));
98 /* Get the defs for the rhs of STMT (collect them in DEF_STMTS0/1), check that
99 they are of a legal type and that they match the defs of the first stmt of
100 the SLP group (stored in FIRST_STMT_...). */
103 vect_get_and_check_slp_defs (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo,
104 slp_tree slp_node, gimple stmt,
105 VEC (gimple, heap) **def_stmts0,
106 VEC (gimple, heap) **def_stmts1,
107 enum vect_def_type *first_stmt_dt0,
108 enum vect_def_type *first_stmt_dt1,
109 tree *first_stmt_def0_type,
110 tree *first_stmt_def1_type,
111 tree *first_stmt_const_oprnd,
112 int ncopies_for_cost,
113 bool *pattern0, bool *pattern1)
116 unsigned int i, number_of_oprnds;
119 enum vect_def_type dt[2] = {vect_unknown_def_type, vect_unknown_def_type};
120 stmt_vec_info stmt_info =
121 vinfo_for_stmt (VEC_index (gimple, SLP_TREE_SCALAR_STMTS (slp_node), 0));
122 enum gimple_rhs_class rhs_class;
123 struct loop *loop = NULL;
126 loop = LOOP_VINFO_LOOP (loop_vinfo);
128 rhs_class = get_gimple_rhs_class (gimple_assign_rhs_code (stmt));
129 number_of_oprnds = gimple_num_ops (stmt) - 1; /* RHS only */
131 for (i = 0; i < number_of_oprnds; i++)
133 oprnd = gimple_op (stmt, i + 1);
135 if (!vect_is_simple_use (oprnd, loop_vinfo, bb_vinfo, &def_stmt, &def,
137 || (!def_stmt && dt[i] != vect_constant_def))
139 if (vect_print_dump_info (REPORT_SLP))
141 fprintf (vect_dump, "Build SLP failed: can't find def for ");
142 print_generic_expr (vect_dump, oprnd, TDF_SLIM);
148 /* Check if DEF_STMT is a part of a pattern in LOOP and get the def stmt
149 from the pattern. Check that all the stmts of the node are in the
151 if (loop && def_stmt && gimple_bb (def_stmt)
152 && flow_bb_inside_loop_p (loop, gimple_bb (def_stmt))
153 && vinfo_for_stmt (def_stmt)
154 && STMT_VINFO_IN_PATTERN_P (vinfo_for_stmt (def_stmt)))
156 if (!*first_stmt_dt0)
160 if (i == 1 && !*first_stmt_dt1)
162 else if ((i == 0 && !*pattern0) || (i == 1 && !*pattern1))
164 if (vect_print_dump_info (REPORT_DETAILS))
166 fprintf (vect_dump, "Build SLP failed: some of the stmts"
167 " are in a pattern, and others are not ");
168 print_generic_expr (vect_dump, oprnd, TDF_SLIM);
175 def_stmt = STMT_VINFO_RELATED_STMT (vinfo_for_stmt (def_stmt));
176 dt[i] = STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def_stmt));
178 if (*dt == vect_unknown_def_type)
180 if (vect_print_dump_info (REPORT_DETAILS))
181 fprintf (vect_dump, "Unsupported pattern.");
185 switch (gimple_code (def_stmt))
188 def = gimple_phi_result (def_stmt);
192 def = gimple_assign_lhs (def_stmt);
196 if (vect_print_dump_info (REPORT_DETAILS))
197 fprintf (vect_dump, "unsupported defining stmt: ");
202 if (!*first_stmt_dt0)
204 /* op0 of the first stmt of the group - store its info. */
205 *first_stmt_dt0 = dt[i];
207 *first_stmt_def0_type = TREE_TYPE (def);
209 *first_stmt_const_oprnd = oprnd;
211 /* Analyze costs (for the first stmt of the group only). */
212 if (rhs_class != GIMPLE_SINGLE_RHS)
213 /* Not memory operation (we don't call this functions for loads). */
214 vect_model_simple_cost (stmt_info, ncopies_for_cost, dt, slp_node);
217 vect_model_store_cost (stmt_info, ncopies_for_cost, dt[0], slp_node);
222 if (!*first_stmt_dt1 && i == 1)
224 /* op1 of the first stmt of the group - store its info. */
225 *first_stmt_dt1 = dt[i];
227 *first_stmt_def1_type = TREE_TYPE (def);
230 /* We assume that the stmt contains only one constant
231 operand. We fail otherwise, to be on the safe side. */
232 if (*first_stmt_const_oprnd)
234 if (vect_print_dump_info (REPORT_SLP))
235 fprintf (vect_dump, "Build SLP failed: two constant "
239 *first_stmt_const_oprnd = oprnd;
244 /* Not first stmt of the group, check that the def-stmt/s match
245 the def-stmt/s of the first stmt. */
247 && (*first_stmt_dt0 != dt[i]
248 || (*first_stmt_def0_type && def
249 && *first_stmt_def0_type != TREE_TYPE (def))))
251 && (*first_stmt_dt1 != dt[i]
252 || (*first_stmt_def1_type && def
253 && *first_stmt_def1_type != TREE_TYPE (def))))
255 && TREE_TYPE (*first_stmt_const_oprnd)
256 != TREE_TYPE (oprnd)))
258 if (vect_print_dump_info (REPORT_SLP))
259 fprintf (vect_dump, "Build SLP failed: different types ");
266 /* Check the types of the definitions. */
269 case vect_constant_def:
270 case vect_external_def:
273 case vect_internal_def:
275 VEC_safe_push (gimple, heap, *def_stmts0, def_stmt);
277 VEC_safe_push (gimple, heap, *def_stmts1, def_stmt);
281 /* FORNOW: Not supported. */
282 if (vect_print_dump_info (REPORT_SLP))
284 fprintf (vect_dump, "Build SLP failed: illegal type of def ");
285 print_generic_expr (vect_dump, def, TDF_SLIM);
296 /* Recursively build an SLP tree starting from NODE.
297 Fail (and return FALSE) if def-stmts are not isomorphic, require data
298 permutation or are of unsupported types of operation. Otherwise, return
302 vect_build_slp_tree (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo,
303 slp_tree *node, unsigned int group_size,
304 int *inside_cost, int *outside_cost,
305 int ncopies_for_cost, unsigned int *max_nunits,
306 VEC (int, heap) **load_permutation,
307 VEC (slp_tree, heap) **loads,
308 unsigned int vectorization_factor)
310 VEC (gimple, heap) *def_stmts0 = VEC_alloc (gimple, heap, group_size);
311 VEC (gimple, heap) *def_stmts1 = VEC_alloc (gimple, heap, group_size);
313 VEC (gimple, heap) *stmts = SLP_TREE_SCALAR_STMTS (*node);
314 gimple stmt = VEC_index (gimple, stmts, 0);
315 enum vect_def_type first_stmt_dt0 = vect_uninitialized_def;
316 enum vect_def_type first_stmt_dt1 = vect_uninitialized_def;
317 enum tree_code first_stmt_code = ERROR_MARK, rhs_code;
318 tree first_stmt_def1_type = NULL_TREE, first_stmt_def0_type = NULL_TREE;
320 bool stop_recursion = false, need_same_oprnds = false;
321 tree vectype, scalar_type, first_op1 = NULL_TREE;
322 unsigned int ncopies;
325 enum machine_mode optab_op2_mode;
326 enum machine_mode vec_mode;
327 tree first_stmt_const_oprnd = NULL_TREE;
328 struct data_reference *first_dr;
329 bool pattern0 = false, pattern1 = false;
331 bool permutation = false;
332 unsigned int load_place;
335 /* For every stmt in NODE find its def stmt/s. */
336 for (i = 0; VEC_iterate (gimple, stmts, i, stmt); i++)
338 if (vect_print_dump_info (REPORT_SLP))
340 fprintf (vect_dump, "Build SLP for ");
341 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
344 lhs = gimple_get_lhs (stmt);
345 if (lhs == NULL_TREE)
347 if (vect_print_dump_info (REPORT_SLP))
350 "Build SLP failed: not GIMPLE_ASSIGN nor GIMPLE_CALL");
351 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
357 scalar_type = vect_get_smallest_scalar_type (stmt, &dummy, &dummy);
358 vectype = get_vectype_for_scalar_type (scalar_type);
361 if (vect_print_dump_info (REPORT_SLP))
363 fprintf (vect_dump, "Build SLP failed: unsupported data-type ");
364 print_generic_expr (vect_dump, scalar_type, TDF_SLIM);
369 ncopies = vectorization_factor / TYPE_VECTOR_SUBPARTS (vectype);
372 if (vect_print_dump_info (REPORT_SLP))
373 fprintf (vect_dump, "SLP with multiple types ");
375 /* FORNOW: multiple types are unsupported in BB SLP. */
380 /* In case of multiple types we need to detect the smallest type. */
381 if (*max_nunits < TYPE_VECTOR_SUBPARTS (vectype))
382 *max_nunits = TYPE_VECTOR_SUBPARTS (vectype);
384 if (is_gimple_call (stmt))
385 rhs_code = CALL_EXPR;
387 rhs_code = gimple_assign_rhs_code (stmt);
389 /* Check the operation. */
392 first_stmt_code = rhs_code;
394 /* Shift arguments should be equal in all the packed stmts for a
395 vector shift with scalar shift operand. */
396 if (rhs_code == LSHIFT_EXPR || rhs_code == RSHIFT_EXPR
397 || rhs_code == LROTATE_EXPR
398 || rhs_code == RROTATE_EXPR)
400 vec_mode = TYPE_MODE (vectype);
402 /* First see if we have a vector/vector shift. */
403 optab = optab_for_tree_code (rhs_code, vectype,
407 || (optab->handlers[(int) vec_mode].insn_code
408 == CODE_FOR_nothing))
410 /* No vector/vector shift, try for a vector/scalar shift. */
411 optab = optab_for_tree_code (rhs_code, vectype,
416 if (vect_print_dump_info (REPORT_SLP))
417 fprintf (vect_dump, "Build SLP failed: no optab.");
420 icode = (int) optab->handlers[(int) vec_mode].insn_code;
421 if (icode == CODE_FOR_nothing)
423 if (vect_print_dump_info (REPORT_SLP))
424 fprintf (vect_dump, "Build SLP failed: "
425 "op not supported by target.");
428 optab_op2_mode = insn_data[icode].operand[2].mode;
429 if (!VECTOR_MODE_P (optab_op2_mode))
431 need_same_oprnds = true;
432 first_op1 = gimple_assign_rhs2 (stmt);
439 if (first_stmt_code != rhs_code
440 && (first_stmt_code != IMAGPART_EXPR
441 || rhs_code != REALPART_EXPR)
442 && (first_stmt_code != REALPART_EXPR
443 || rhs_code != IMAGPART_EXPR))
445 if (vect_print_dump_info (REPORT_SLP))
448 "Build SLP failed: different operation in stmt ");
449 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
456 && !operand_equal_p (first_op1, gimple_assign_rhs2 (stmt), 0))
458 if (vect_print_dump_info (REPORT_SLP))
461 "Build SLP failed: different shift arguments in ");
462 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
469 /* Strided store or load. */
470 if (STMT_VINFO_STRIDED_ACCESS (vinfo_for_stmt (stmt)))
472 if (REFERENCE_CLASS_P (lhs))
475 if (!vect_get_and_check_slp_defs (loop_vinfo, bb_vinfo, *node,
476 stmt, &def_stmts0, &def_stmts1,
479 &first_stmt_def0_type,
480 &first_stmt_def1_type,
481 &first_stmt_const_oprnd,
483 &pattern0, &pattern1))
489 /* FORNOW: Check that there is no gap between the loads. */
490 if ((DR_GROUP_FIRST_DR (vinfo_for_stmt (stmt)) == stmt
491 && DR_GROUP_GAP (vinfo_for_stmt (stmt)) != 0)
492 || (DR_GROUP_FIRST_DR (vinfo_for_stmt (stmt)) != stmt
493 && DR_GROUP_GAP (vinfo_for_stmt (stmt)) != 1))
495 if (vect_print_dump_info (REPORT_SLP))
497 fprintf (vect_dump, "Build SLP failed: strided "
499 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
505 /* Check that the size of interleaved loads group is not
506 greater than the SLP group size. */
507 if (DR_GROUP_SIZE (vinfo_for_stmt (stmt))
508 > ncopies * group_size)
510 if (vect_print_dump_info (REPORT_SLP))
512 fprintf (vect_dump, "Build SLP failed: the number of "
513 "interleaved loads is greater than"
514 " the SLP group size ");
515 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
521 first_load = DR_GROUP_FIRST_DR (vinfo_for_stmt (stmt));
523 if (first_load == stmt)
525 first_dr = STMT_VINFO_DATA_REF (vinfo_for_stmt (stmt));
526 if (vect_supportable_dr_alignment (first_dr)
527 == dr_unaligned_unsupported)
529 if (vect_print_dump_info (REPORT_SLP))
531 fprintf (vect_dump, "Build SLP failed: unsupported "
533 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
539 /* Analyze costs (for the first stmt in the group). */
540 vect_model_load_cost (vinfo_for_stmt (stmt),
541 ncopies_for_cost, *node);
544 /* Store the place of this load in the interleaving chain. In
545 case that permutation is needed we later decide if a specific
546 permutation is supported. */
547 load_place = vect_get_place_in_interleaving_chain (stmt,
552 VEC_safe_push (int, heap, *load_permutation, load_place);
554 /* We stop the tree when we reach a group of loads. */
555 stop_recursion = true;
558 } /* Strided access. */
561 if (TREE_CODE_CLASS (rhs_code) == tcc_reference)
563 /* Not strided load. */
564 if (vect_print_dump_info (REPORT_SLP))
566 fprintf (vect_dump, "Build SLP failed: not strided load ");
567 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
570 /* FORNOW: Not strided loads are not supported. */
574 /* Not memory operation. */
575 if (TREE_CODE_CLASS (rhs_code) != tcc_binary
576 && TREE_CODE_CLASS (rhs_code) != tcc_unary)
578 if (vect_print_dump_info (REPORT_SLP))
580 fprintf (vect_dump, "Build SLP failed: operation");
581 fprintf (vect_dump, " unsupported ");
582 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
588 /* Find the def-stmts. */
589 if (!vect_get_and_check_slp_defs (loop_vinfo, bb_vinfo, *node, stmt,
590 &def_stmts0, &def_stmts1,
591 &first_stmt_dt0, &first_stmt_dt1,
592 &first_stmt_def0_type,
593 &first_stmt_def1_type,
594 &first_stmt_const_oprnd,
596 &pattern0, &pattern1))
601 /* Add the costs of the node to the overall instance costs. */
602 *inside_cost += SLP_TREE_INSIDE_OF_LOOP_COST (*node);
603 *outside_cost += SLP_TREE_OUTSIDE_OF_LOOP_COST (*node);
605 /* Strided loads were reached - stop the recursion. */
610 VEC_safe_push (slp_tree, heap, *loads, *node);
611 *inside_cost += TARG_VEC_PERMUTE_COST * group_size;
617 /* Create SLP_TREE nodes for the definition node/s. */
618 if (first_stmt_dt0 == vect_internal_def)
620 slp_tree left_node = XNEW (struct _slp_tree);
621 SLP_TREE_SCALAR_STMTS (left_node) = def_stmts0;
622 SLP_TREE_VEC_STMTS (left_node) = NULL;
623 SLP_TREE_LEFT (left_node) = NULL;
624 SLP_TREE_RIGHT (left_node) = NULL;
625 SLP_TREE_OUTSIDE_OF_LOOP_COST (left_node) = 0;
626 SLP_TREE_INSIDE_OF_LOOP_COST (left_node) = 0;
627 if (!vect_build_slp_tree (loop_vinfo, bb_vinfo, &left_node, group_size,
628 inside_cost, outside_cost, ncopies_for_cost,
629 max_nunits, load_permutation, loads,
630 vectorization_factor))
633 SLP_TREE_LEFT (*node) = left_node;
636 if (first_stmt_dt1 == vect_internal_def)
638 slp_tree right_node = XNEW (struct _slp_tree);
639 SLP_TREE_SCALAR_STMTS (right_node) = def_stmts1;
640 SLP_TREE_VEC_STMTS (right_node) = NULL;
641 SLP_TREE_LEFT (right_node) = NULL;
642 SLP_TREE_RIGHT (right_node) = NULL;
643 SLP_TREE_OUTSIDE_OF_LOOP_COST (right_node) = 0;
644 SLP_TREE_INSIDE_OF_LOOP_COST (right_node) = 0;
645 if (!vect_build_slp_tree (loop_vinfo, bb_vinfo, &right_node, group_size,
646 inside_cost, outside_cost, ncopies_for_cost,
647 max_nunits, load_permutation, loads,
648 vectorization_factor))
651 SLP_TREE_RIGHT (*node) = right_node;
659 vect_print_slp_tree (slp_tree node)
667 fprintf (vect_dump, "node ");
668 for (i = 0; VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (node), i, stmt); i++)
670 fprintf (vect_dump, "\n\tstmt %d ", i);
671 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
673 fprintf (vect_dump, "\n");
675 vect_print_slp_tree (SLP_TREE_LEFT (node));
676 vect_print_slp_tree (SLP_TREE_RIGHT (node));
680 /* Mark the tree rooted at NODE with MARK (PURE_SLP or HYBRID).
681 If MARK is HYBRID, it refers to a specific stmt in NODE (the stmt at index
682 J). Otherwise, MARK is PURE_SLP and J is -1, which indicates that all the
683 stmts in NODE are to be marked. */
686 vect_mark_slp_stmts (slp_tree node, enum slp_vect_type mark, int j)
694 for (i = 0; VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (node), i, stmt); i++)
696 STMT_SLP_TYPE (vinfo_for_stmt (stmt)) = mark;
698 vect_mark_slp_stmts (SLP_TREE_LEFT (node), mark, j);
699 vect_mark_slp_stmts (SLP_TREE_RIGHT (node), mark, j);
703 /* Mark the statements of the tree rooted at NODE as relevant (vect_used). */
706 vect_mark_slp_stmts_relevant (slp_tree node)
710 stmt_vec_info stmt_info;
715 for (i = 0; VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (node), i, stmt); i++)
717 stmt_info = vinfo_for_stmt (stmt);
718 gcc_assert (!STMT_VINFO_RELEVANT (stmt_info)
719 || STMT_VINFO_RELEVANT (stmt_info) == vect_used_in_scope);
720 STMT_VINFO_RELEVANT (stmt_info) = vect_used_in_scope;
723 vect_mark_slp_stmts_relevant (SLP_TREE_LEFT (node));
724 vect_mark_slp_stmts_relevant (SLP_TREE_RIGHT (node));
728 /* Check if the permutation required by the SLP INSTANCE is supported.
729 Reorganize the SLP nodes stored in SLP_INSTANCE_LOADS if needed. */
732 vect_supported_slp_permutation_p (slp_instance instance)
734 slp_tree node = VEC_index (slp_tree, SLP_INSTANCE_LOADS (instance), 0);
735 gimple stmt = VEC_index (gimple, SLP_TREE_SCALAR_STMTS (node), 0);
736 gimple first_load = DR_GROUP_FIRST_DR (vinfo_for_stmt (stmt));
737 VEC (slp_tree, heap) *sorted_loads = NULL;
739 slp_tree *tmp_loads = NULL;
740 int group_size = SLP_INSTANCE_GROUP_SIZE (instance), i, j;
743 /* FORNOW: The only supported loads permutation is loads from the same
744 location in all the loads in the node, when the data-refs in
745 nodes of LOADS constitute an interleaving chain.
746 Sort the nodes according to the order of accesses in the chain. */
747 tmp_loads = (slp_tree *) xmalloc (sizeof (slp_tree) * group_size);
749 VEC_iterate (int, SLP_INSTANCE_LOAD_PERMUTATION (instance), i, index)
750 && VEC_iterate (slp_tree, SLP_INSTANCE_LOADS (instance), j, load);
751 i += group_size, j++)
753 gimple scalar_stmt = VEC_index (gimple, SLP_TREE_SCALAR_STMTS (load), 0);
754 /* Check that the loads are all in the same interleaving chain. */
755 if (DR_GROUP_FIRST_DR (vinfo_for_stmt (scalar_stmt)) != first_load)
757 if (vect_print_dump_info (REPORT_DETAILS))
759 fprintf (vect_dump, "Build SLP failed: unsupported data "
761 print_gimple_stmt (vect_dump, scalar_stmt, 0, TDF_SLIM);
768 tmp_loads[index] = load;
771 sorted_loads = VEC_alloc (slp_tree, heap, group_size);
772 for (i = 0; i < group_size; i++)
773 VEC_safe_push (slp_tree, heap, sorted_loads, tmp_loads[i]);
775 VEC_free (slp_tree, heap, SLP_INSTANCE_LOADS (instance));
776 SLP_INSTANCE_LOADS (instance) = sorted_loads;
779 if (!vect_transform_slp_perm_load (stmt, NULL, NULL,
780 SLP_INSTANCE_UNROLLING_FACTOR (instance),
788 /* Check if the required load permutation is supported.
789 LOAD_PERMUTATION contains a list of indices of the loads.
790 In SLP this permutation is relative to the order of strided stores that are
791 the base of the SLP instance. */
794 vect_supported_load_permutation_p (slp_instance slp_instn, int group_size,
795 VEC (int, heap) *load_permutation)
797 int i = 0, j, prev = -1, next, k;
800 /* FORNOW: permutations are only supported in SLP. */
804 if (vect_print_dump_info (REPORT_SLP))
806 fprintf (vect_dump, "Load permutation ");
807 for (i = 0; VEC_iterate (int, load_permutation, i, next); i++)
808 fprintf (vect_dump, "%d ", next);
811 /* FORNOW: the only supported permutation is 0..01..1.. of length equal to
812 GROUP_SIZE and where each sequence of same drs is of GROUP_SIZE length as
814 if (VEC_length (int, load_permutation)
815 != (unsigned int) (group_size * group_size))
819 for (j = 0; j < group_size; j++)
821 for (i = j * group_size, k = 0;
822 VEC_iterate (int, load_permutation, i, next) && k < group_size;
825 if (i != j * group_size && next != prev)
835 if (supported && i == group_size * group_size
836 && vect_supported_slp_permutation_p (slp_instn))
843 /* Find the first load in the loop that belongs to INSTANCE.
844 When loads are in several SLP nodes, there can be a case in which the first
845 load does not appear in the first SLP node to be transformed, causing
846 incorrect order of statements. Since we generate all the loads together,
847 they must be inserted before the first load of the SLP instance and not
848 before the first load of the first node of the instance. */
850 vect_find_first_load_in_slp_instance (slp_instance instance)
854 gimple first_load = NULL, load;
857 VEC_iterate (slp_tree, SLP_INSTANCE_LOADS (instance), i, load_node);
860 VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (load_node), j, load);
862 first_load = get_earlier_stmt (load, first_load);
868 /* Analyze an SLP instance starting from a group of strided stores. Call
869 vect_build_slp_tree to build a tree of packed stmts if possible.
870 Return FALSE if it's impossible to SLP any stmt in the loop. */
873 vect_analyze_slp_instance (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo,
876 slp_instance new_instance;
877 slp_tree node = XNEW (struct _slp_tree);
878 unsigned int group_size = DR_GROUP_SIZE (vinfo_for_stmt (stmt));
879 unsigned int unrolling_factor = 1, nunits;
880 tree vectype, scalar_type;
882 unsigned int vectorization_factor = 0, ncopies;
883 int inside_cost = 0, outside_cost = 0, ncopies_for_cost;
884 unsigned int max_nunits = 0;
885 VEC (int, heap) *load_permutation;
886 VEC (slp_tree, heap) *loads;
888 scalar_type = TREE_TYPE (DR_REF (STMT_VINFO_DATA_REF (
889 vinfo_for_stmt (stmt))));
890 vectype = get_vectype_for_scalar_type (scalar_type);
893 if (vect_print_dump_info (REPORT_SLP))
895 fprintf (vect_dump, "Build SLP failed: unsupported data-type ");
896 print_generic_expr (vect_dump, scalar_type, TDF_SLIM);
901 nunits = TYPE_VECTOR_SUBPARTS (vectype);
903 vectorization_factor = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
905 /* No multitypes in BB SLP. */
906 vectorization_factor = nunits;
908 ncopies = vectorization_factor / nunits;
910 /* Calculate the unrolling factor. */
911 unrolling_factor = least_common_multiple (nunits, group_size) / group_size;
912 if (unrolling_factor != 1 && !loop_vinfo)
914 if (vect_print_dump_info (REPORT_SLP))
915 fprintf (vect_dump, "Build SLP failed: unrolling required in basic"
921 /* Create a node (a root of the SLP tree) for the packed strided stores. */
922 SLP_TREE_SCALAR_STMTS (node) = VEC_alloc (gimple, heap, group_size);
924 /* Collect the stores and store them in SLP_TREE_SCALAR_STMTS. */
927 VEC_safe_push (gimple, heap, SLP_TREE_SCALAR_STMTS (node), next);
928 next = DR_GROUP_NEXT_DR (vinfo_for_stmt (next));
931 SLP_TREE_VEC_STMTS (node) = NULL;
932 SLP_TREE_NUMBER_OF_VEC_STMTS (node) = 0;
933 SLP_TREE_LEFT (node) = NULL;
934 SLP_TREE_RIGHT (node) = NULL;
935 SLP_TREE_OUTSIDE_OF_LOOP_COST (node) = 0;
936 SLP_TREE_INSIDE_OF_LOOP_COST (node) = 0;
938 /* Calculate the number of vector stmts to create based on the unrolling
939 factor (number of vectors is 1 if NUNITS >= GROUP_SIZE, and is
940 GROUP_SIZE / NUNITS otherwise. */
941 ncopies_for_cost = unrolling_factor * group_size / nunits;
943 load_permutation = VEC_alloc (int, heap, group_size * group_size);
944 loads = VEC_alloc (slp_tree, heap, group_size);
946 /* Build the tree for the SLP instance. */
947 if (vect_build_slp_tree (loop_vinfo, bb_vinfo, &node, group_size,
948 &inside_cost, &outside_cost, ncopies_for_cost,
949 &max_nunits, &load_permutation, &loads,
950 vectorization_factor))
952 /* Create a new SLP instance. */
953 new_instance = XNEW (struct _slp_instance);
954 SLP_INSTANCE_TREE (new_instance) = node;
955 SLP_INSTANCE_GROUP_SIZE (new_instance) = group_size;
956 /* Calculate the unrolling factor based on the smallest type in the
958 if (max_nunits > nunits)
959 unrolling_factor = least_common_multiple (max_nunits, group_size)
962 SLP_INSTANCE_UNROLLING_FACTOR (new_instance) = unrolling_factor;
963 SLP_INSTANCE_OUTSIDE_OF_LOOP_COST (new_instance) = outside_cost;
964 SLP_INSTANCE_INSIDE_OF_LOOP_COST (new_instance) = inside_cost;
965 SLP_INSTANCE_LOADS (new_instance) = loads;
966 SLP_INSTANCE_FIRST_LOAD_STMT (new_instance) = NULL;
967 SLP_INSTANCE_LOAD_PERMUTATION (new_instance) = load_permutation;
968 if (VEC_length (slp_tree, loads))
970 if (!vect_supported_load_permutation_p (new_instance, group_size,
973 if (vect_print_dump_info (REPORT_SLP))
975 fprintf (vect_dump, "Build SLP failed: unsupported load "
977 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
980 vect_free_slp_instance (new_instance);
984 SLP_INSTANCE_FIRST_LOAD_STMT (new_instance)
985 = vect_find_first_load_in_slp_instance (new_instance);
988 VEC_free (int, heap, SLP_INSTANCE_LOAD_PERMUTATION (new_instance));
991 VEC_safe_push (slp_instance, heap,
992 LOOP_VINFO_SLP_INSTANCES (loop_vinfo),
995 VEC_safe_push (slp_instance, heap, BB_VINFO_SLP_INSTANCES (bb_vinfo),
998 if (vect_print_dump_info (REPORT_SLP))
999 vect_print_slp_tree (node);
1004 /* Failed to SLP. */
1005 /* Free the allocated memory. */
1006 vect_free_slp_tree (node);
1007 VEC_free (int, heap, load_permutation);
1008 VEC_free (slp_tree, heap, loads);
1014 /* Check if there are stmts in the loop can be vectorized using SLP. Build SLP
1015 trees of packed scalar stmts if SLP is possible. */
1018 vect_analyze_slp (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo)
1021 VEC (gimple, heap) *strided_stores;
1025 if (vect_print_dump_info (REPORT_SLP))
1026 fprintf (vect_dump, "=== vect_analyze_slp ===");
1029 strided_stores = LOOP_VINFO_STRIDED_STORES (loop_vinfo);
1031 strided_stores = BB_VINFO_STRIDED_STORES (bb_vinfo);
1033 for (i = 0; VEC_iterate (gimple, strided_stores, i, store); i++)
1034 if (vect_analyze_slp_instance (loop_vinfo, bb_vinfo, store))
1037 if (bb_vinfo && !ok)
1039 if (vect_print_dump_info (REPORT_SLP))
1040 fprintf (vect_dump, "Failed to SLP the basic block.");
1049 /* For each possible SLP instance decide whether to SLP it and calculate overall
1050 unrolling factor needed to SLP the loop. */
1053 vect_make_slp_decision (loop_vec_info loop_vinfo)
1055 unsigned int i, unrolling_factor = 1;
1056 VEC (slp_instance, heap) *slp_instances = LOOP_VINFO_SLP_INSTANCES (loop_vinfo);
1057 slp_instance instance;
1058 int decided_to_slp = 0;
1060 if (vect_print_dump_info (REPORT_SLP))
1061 fprintf (vect_dump, "=== vect_make_slp_decision ===");
1063 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); i++)
1065 /* FORNOW: SLP if you can. */
1066 if (unrolling_factor < SLP_INSTANCE_UNROLLING_FACTOR (instance))
1067 unrolling_factor = SLP_INSTANCE_UNROLLING_FACTOR (instance);
1069 /* Mark all the stmts that belong to INSTANCE as PURE_SLP stmts. Later we
1070 call vect_detect_hybrid_slp () to find stmts that need hybrid SLP and
1071 loop-based vectorization. Such stmts will be marked as HYBRID. */
1072 vect_mark_slp_stmts (SLP_INSTANCE_TREE (instance), pure_slp, -1);
1076 LOOP_VINFO_SLP_UNROLLING_FACTOR (loop_vinfo) = unrolling_factor;
1078 if (decided_to_slp && vect_print_dump_info (REPORT_SLP))
1079 fprintf (vect_dump, "Decided to SLP %d instances. Unrolling factor %d",
1080 decided_to_slp, unrolling_factor);
1084 /* Find stmts that must be both vectorized and SLPed (since they feed stmts that
1085 can't be SLPed) in the tree rooted at NODE. Mark such stmts as HYBRID. */
1088 vect_detect_hybrid_slp_stmts (slp_tree node)
1092 imm_use_iterator imm_iter;
1098 for (i = 0; VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (node), i, stmt); i++)
1099 if (PURE_SLP_STMT (vinfo_for_stmt (stmt))
1100 && TREE_CODE (gimple_op (stmt, 0)) == SSA_NAME)
1101 FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, gimple_op (stmt, 0))
1102 if (vinfo_for_stmt (use_stmt)
1103 && !STMT_SLP_TYPE (vinfo_for_stmt (use_stmt))
1104 && STMT_VINFO_RELEVANT (vinfo_for_stmt (use_stmt)))
1105 vect_mark_slp_stmts (node, hybrid, i);
1107 vect_detect_hybrid_slp_stmts (SLP_TREE_LEFT (node));
1108 vect_detect_hybrid_slp_stmts (SLP_TREE_RIGHT (node));
1112 /* Find stmts that must be both vectorized and SLPed. */
1115 vect_detect_hybrid_slp (loop_vec_info loop_vinfo)
1118 VEC (slp_instance, heap) *slp_instances = LOOP_VINFO_SLP_INSTANCES (loop_vinfo);
1119 slp_instance instance;
1121 if (vect_print_dump_info (REPORT_SLP))
1122 fprintf (vect_dump, "=== vect_detect_hybrid_slp ===");
1124 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); i++)
1125 vect_detect_hybrid_slp_stmts (SLP_INSTANCE_TREE (instance));
1129 /* Create and initialize a new bb_vec_info struct for BB, as well as
1130 stmt_vec_info structs for all the stmts in it. */
1133 new_bb_vec_info (basic_block bb)
1135 bb_vec_info res = NULL;
1136 gimple_stmt_iterator gsi;
1138 res = (bb_vec_info) xcalloc (1, sizeof (struct _bb_vec_info));
1139 BB_VINFO_BB (res) = bb;
1141 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
1143 gimple stmt = gsi_stmt (gsi);
1144 gimple_set_uid (stmt, 0);
1145 set_vinfo_for_stmt (stmt, new_stmt_vec_info (stmt, NULL, res));
1148 BB_VINFO_STRIDED_STORES (res) = VEC_alloc (gimple, heap, 10);
1149 BB_VINFO_SLP_INSTANCES (res) = VEC_alloc (slp_instance, heap, 2);
1156 /* Free BB_VINFO struct, as well as all the stmt_vec_info structs of all the
1157 stmts in the basic block. */
1160 destroy_bb_vec_info (bb_vec_info bb_vinfo)
1163 gimple_stmt_iterator si;
1168 bb = BB_VINFO_BB (bb_vinfo);
1170 for (si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&si))
1172 gimple stmt = gsi_stmt (si);
1173 stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
1176 /* Free stmt_vec_info. */
1177 free_stmt_vec_info (stmt);
1180 VEC_free (gimple, heap, BB_VINFO_STRIDED_STORES (bb_vinfo));
1181 VEC_free (slp_instance, heap, BB_VINFO_SLP_INSTANCES (bb_vinfo));
1187 /* Analyze statements contained in SLP tree node after recursively analyzing
1188 the subtree. Return TRUE if the operations are supported. */
1191 vect_slp_analyze_node_operations (bb_vec_info bb_vinfo, slp_tree node)
1200 if (!vect_slp_analyze_node_operations (bb_vinfo, SLP_TREE_LEFT (node))
1201 || !vect_slp_analyze_node_operations (bb_vinfo, SLP_TREE_RIGHT (node)))
1204 for (i = 0; VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (node), i, stmt); i++)
1206 stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
1207 gcc_assert (stmt_info);
1208 gcc_assert (PURE_SLP_STMT (stmt_info));
1210 if (!vect_analyze_stmt (stmt, &dummy, node))
1218 /* Analyze statements in SLP instances of the basic block. Return TRUE if the
1219 operations are supported. */
1222 vect_slp_analyze_operations (bb_vec_info bb_vinfo)
1224 VEC (slp_instance, heap) *slp_instances = BB_VINFO_SLP_INSTANCES (bb_vinfo);
1225 slp_instance instance;
1228 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); )
1230 if (!vect_slp_analyze_node_operations (bb_vinfo,
1231 SLP_INSTANCE_TREE (instance)))
1233 vect_free_slp_instance (instance);
1234 VEC_ordered_remove (slp_instance, slp_instances, i);
1240 if (!VEC_length (slp_instance, slp_instances))
1247 /* Cheick if the basic block can be vectorized. */
1250 vect_slp_analyze_bb (basic_block bb)
1252 bb_vec_info bb_vinfo;
1253 VEC (ddr_p, heap) *ddrs;
1254 VEC (slp_instance, heap) *slp_instances;
1255 slp_instance instance;
1257 gimple_stmt_iterator gsi;
1259 if (vect_print_dump_info (REPORT_DETAILS))
1260 fprintf (vect_dump, "===vect_slp_analyze_bb===\n");
1262 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
1265 if (insns > PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB))
1267 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1268 fprintf (vect_dump, "not vectorized: too many instructions in basic "
1274 bb_vinfo = new_bb_vec_info (bb);
1278 if (!vect_analyze_data_refs (NULL, bb_vinfo))
1280 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1281 fprintf (vect_dump, "not vectorized: unhandled data-ref in basic "
1284 destroy_bb_vec_info (bb_vinfo);
1288 ddrs = BB_VINFO_DDRS (bb_vinfo);
1289 if (!VEC_length (ddr_p, ddrs))
1291 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1292 fprintf (vect_dump, "not vectorized: not enough data-refs in basic "
1295 destroy_bb_vec_info (bb_vinfo);
1299 if (!vect_analyze_data_refs_alignment (NULL, bb_vinfo))
1301 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1302 fprintf (vect_dump, "not vectorized: bad data alignment in basic "
1305 destroy_bb_vec_info (bb_vinfo);
1309 if (!vect_analyze_data_ref_dependences (NULL, bb_vinfo))
1311 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1312 fprintf (vect_dump, "not vectorized: unhandled data dependence in basic"
1315 destroy_bb_vec_info (bb_vinfo);
1319 if (!vect_analyze_data_ref_accesses (NULL, bb_vinfo))
1321 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1322 fprintf (vect_dump, "not vectorized: unhandled data access in basic "
1325 destroy_bb_vec_info (bb_vinfo);
1329 if (!vect_verify_datarefs_alignment (NULL, bb_vinfo))
1331 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1332 fprintf (vect_dump, "not vectorized: unsupported alignment in basic "
1335 destroy_bb_vec_info (bb_vinfo);
1339 /* Check the SLP opportunities in the basic block, analyze and build SLP
1341 if (!vect_analyze_slp (NULL, bb_vinfo))
1343 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1344 fprintf (vect_dump, "not vectorized: failed to find SLP opportunities "
1345 "in basic block.\n");
1347 destroy_bb_vec_info (bb_vinfo);
1351 slp_instances = BB_VINFO_SLP_INSTANCES (bb_vinfo);
1353 /* Mark all the statements that we want to vectorize as pure SLP and
1355 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); i++)
1357 vect_mark_slp_stmts (SLP_INSTANCE_TREE (instance), pure_slp, -1);
1358 vect_mark_slp_stmts_relevant (SLP_INSTANCE_TREE (instance));
1361 if (!vect_slp_analyze_operations (bb_vinfo))
1363 if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
1364 fprintf (vect_dump, "not vectorized: bad operation in basic block.\n");
1366 destroy_bb_vec_info (bb_vinfo);
1370 if (vect_print_dump_info (REPORT_DETAILS))
1371 fprintf (vect_dump, "Basic block will be vectorized using SLP\n");
1377 /* SLP costs are calculated according to SLP instance unrolling factor (i.e.,
1378 the number of created vector stmts depends on the unrolling factor). However,
1379 the actual number of vector stmts for every SLP node depends on VF which is
1380 set later in vect_analyze_operations(). Hence, SLP costs should be updated.
1381 In this function we assume that the inside costs calculated in
1382 vect_model_xxx_cost are linear in ncopies. */
1385 vect_update_slp_costs_according_to_vf (loop_vec_info loop_vinfo)
1387 unsigned int i, vf = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
1388 VEC (slp_instance, heap) *slp_instances = LOOP_VINFO_SLP_INSTANCES (loop_vinfo);
1389 slp_instance instance;
1391 if (vect_print_dump_info (REPORT_SLP))
1392 fprintf (vect_dump, "=== vect_update_slp_costs_according_to_vf ===");
1394 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); i++)
1395 /* We assume that costs are linear in ncopies. */
1396 SLP_INSTANCE_INSIDE_OF_LOOP_COST (instance) *= vf
1397 / SLP_INSTANCE_UNROLLING_FACTOR (instance);
1401 /* For constant and loop invariant defs of SLP_NODE this function returns
1402 (vector) defs (VEC_OPRNDS) that will be used in the vectorized stmts.
1403 OP_NUM determines if we gather defs for operand 0 or operand 1 of the scalar
1404 stmts. NUMBER_OF_VECTORS is the number of vector defs to create. */
1407 vect_get_constant_vectors (slp_tree slp_node, VEC(tree,heap) **vec_oprnds,
1408 unsigned int op_num, unsigned int number_of_vectors)
1410 VEC (gimple, heap) *stmts = SLP_TREE_SCALAR_STMTS (slp_node);
1411 gimple stmt = VEC_index (gimple, stmts, 0);
1412 stmt_vec_info stmt_vinfo = vinfo_for_stmt (stmt);
1413 tree vectype = STMT_VINFO_VECTYPE (stmt_vinfo);
1417 int j, number_of_places_left_in_vector;
1420 int group_size = VEC_length (gimple, stmts);
1421 unsigned int vec_num, i;
1422 int number_of_copies = 1;
1423 VEC (tree, heap) *voprnds = VEC_alloc (tree, heap, number_of_vectors);
1424 bool constant_p, is_store;
1426 if (STMT_VINFO_DATA_REF (stmt_vinfo))
1429 op = gimple_assign_rhs1 (stmt);
1434 op = gimple_op (stmt, op_num + 1);
1437 if (CONSTANT_CLASS_P (op))
1439 vector_type = vectype;
1444 vector_type = get_vectype_for_scalar_type (TREE_TYPE (op));
1445 gcc_assert (vector_type);
1449 nunits = TYPE_VECTOR_SUBPARTS (vector_type);
1451 /* NUMBER_OF_COPIES is the number of times we need to use the same values in
1452 created vectors. It is greater than 1 if unrolling is performed.
1454 For example, we have two scalar operands, s1 and s2 (e.g., group of
1455 strided accesses of size two), while NUNITS is four (i.e., four scalars
1456 of this type can be packed in a vector). The output vector will contain
1457 two copies of each scalar operand: {s1, s2, s1, s2}. (NUMBER_OF_COPIES
1460 If GROUP_SIZE > NUNITS, the scalars will be split into several vectors
1461 containing the operands.
1463 For example, NUNITS is four as before, and the group size is 8
1464 (s1, s2, ..., s8). We will create two vectors {s1, s2, s3, s4} and
1465 {s5, s6, s7, s8}. */
1467 number_of_copies = least_common_multiple (nunits, group_size) / group_size;
1469 number_of_places_left_in_vector = nunits;
1470 for (j = 0; j < number_of_copies; j++)
1472 for (i = group_size - 1; VEC_iterate (gimple, stmts, i, stmt); i--)
1475 op = gimple_assign_rhs1 (stmt);
1477 op = gimple_op (stmt, op_num + 1);
1479 /* Create 'vect_ = {op0,op1,...,opn}'. */
1480 t = tree_cons (NULL_TREE, op, t);
1482 number_of_places_left_in_vector--;
1484 if (number_of_places_left_in_vector == 0)
1486 number_of_places_left_in_vector = nunits;
1489 vec_cst = build_vector (vector_type, t);
1491 vec_cst = build_constructor_from_list (vector_type, t);
1492 VEC_quick_push (tree, voprnds,
1493 vect_init_vector (stmt, vec_cst, vector_type, NULL));
1499 /* Since the vectors are created in the reverse order, we should invert
1501 vec_num = VEC_length (tree, voprnds);
1502 for (j = vec_num - 1; j >= 0; j--)
1504 vop = VEC_index (tree, voprnds, j);
1505 VEC_quick_push (tree, *vec_oprnds, vop);
1508 VEC_free (tree, heap, voprnds);
1510 /* In case that VF is greater than the unrolling factor needed for the SLP
1511 group of stmts, NUMBER_OF_VECTORS to be created is greater than
1512 NUMBER_OF_SCALARS/NUNITS or NUNITS/NUMBER_OF_SCALARS, and hence we have
1513 to replicate the vectors. */
1514 while (number_of_vectors > VEC_length (tree, *vec_oprnds))
1516 for (i = 0; VEC_iterate (tree, *vec_oprnds, i, vop) && i < vec_num; i++)
1517 VEC_quick_push (tree, *vec_oprnds, vop);
1522 /* Get vectorized definitions from SLP_NODE that contains corresponding
1523 vectorized def-stmts. */
1526 vect_get_slp_vect_defs (slp_tree slp_node, VEC (tree,heap) **vec_oprnds)
1529 gimple vec_def_stmt;
1532 gcc_assert (SLP_TREE_VEC_STMTS (slp_node));
1535 VEC_iterate (gimple, SLP_TREE_VEC_STMTS (slp_node), i, vec_def_stmt);
1538 gcc_assert (vec_def_stmt);
1539 vec_oprnd = gimple_get_lhs (vec_def_stmt);
1540 VEC_quick_push (tree, *vec_oprnds, vec_oprnd);
1545 /* Get vectorized definitions for SLP_NODE.
1546 If the scalar definitions are loop invariants or constants, collect them and
1547 call vect_get_constant_vectors() to create vector stmts.
1548 Otherwise, the def-stmts must be already vectorized and the vectorized stmts
1549 must be stored in the LEFT/RIGHT node of SLP_NODE, and we call
1550 vect_get_slp_vect_defs() to retrieve them.
1551 If VEC_OPRNDS1 is NULL, don't get vector defs for the second operand (from
1552 the right node. This is used when the second operand must remain scalar. */
1555 vect_get_slp_defs (slp_tree slp_node, VEC (tree,heap) **vec_oprnds0,
1556 VEC (tree,heap) **vec_oprnds1)
1559 enum tree_code code;
1560 int number_of_vects;
1561 HOST_WIDE_INT lhs_size_unit, rhs_size_unit;
1563 first_stmt = VEC_index (gimple, SLP_TREE_SCALAR_STMTS (slp_node), 0);
1564 /* The number of vector defs is determined by the number of vector statements
1565 in the node from which we get those statements. */
1566 if (SLP_TREE_LEFT (slp_node))
1567 number_of_vects = SLP_TREE_NUMBER_OF_VEC_STMTS (SLP_TREE_LEFT (slp_node));
1570 number_of_vects = SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node);
1571 /* Number of vector stmts was calculated according to LHS in
1572 vect_schedule_slp_instance(), fix it by replacing LHS with RHS, if
1573 necessary. See vect_get_smallest_scalar_type() for details. */
1574 vect_get_smallest_scalar_type (first_stmt, &lhs_size_unit,
1576 if (rhs_size_unit != lhs_size_unit)
1578 number_of_vects *= rhs_size_unit;
1579 number_of_vects /= lhs_size_unit;
1583 /* Allocate memory for vectorized defs. */
1584 *vec_oprnds0 = VEC_alloc (tree, heap, number_of_vects);
1586 /* SLP_NODE corresponds either to a group of stores or to a group of
1587 unary/binary operations. We don't call this function for loads. */
1588 if (SLP_TREE_LEFT (slp_node))
1589 /* The defs are already vectorized. */
1590 vect_get_slp_vect_defs (SLP_TREE_LEFT (slp_node), vec_oprnds0);
1592 /* Build vectors from scalar defs. */
1593 vect_get_constant_vectors (slp_node, vec_oprnds0, 0, number_of_vects);
1595 if (STMT_VINFO_DATA_REF (vinfo_for_stmt (first_stmt)))
1596 /* Since we don't call this function with loads, this is a group of
1600 code = gimple_assign_rhs_code (first_stmt);
1601 if (get_gimple_rhs_class (code) != GIMPLE_BINARY_RHS || !vec_oprnds1)
1604 /* The number of vector defs is determined by the number of vector statements
1605 in the node from which we get those statements. */
1606 if (SLP_TREE_RIGHT (slp_node))
1607 number_of_vects = SLP_TREE_NUMBER_OF_VEC_STMTS (SLP_TREE_RIGHT (slp_node));
1609 number_of_vects = SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node);
1611 *vec_oprnds1 = VEC_alloc (tree, heap, number_of_vects);
1613 if (SLP_TREE_RIGHT (slp_node))
1614 /* The defs are already vectorized. */
1615 vect_get_slp_vect_defs (SLP_TREE_RIGHT (slp_node), vec_oprnds1);
1617 /* Build vectors from scalar defs. */
1618 vect_get_constant_vectors (slp_node, vec_oprnds1, 1, number_of_vects);
1622 /* Create NCOPIES permutation statements using the mask MASK_BYTES (by
1623 building a vector of type MASK_TYPE from it) and two input vectors placed in
1624 DR_CHAIN at FIRST_VEC_INDX and SECOND_VEC_INDX for the first copy and
1625 shifting by STRIDE elements of DR_CHAIN for every copy.
1626 (STRIDE is the number of vectorized stmts for NODE divided by the number of
1628 VECT_STMTS_COUNTER specifies the index in the vectorized stmts of NODE, where
1629 the created stmts must be inserted. */
1632 vect_create_mask_and_perm (gimple stmt, gimple next_scalar_stmt,
1633 tree mask, int first_vec_indx, int second_vec_indx,
1634 gimple_stmt_iterator *gsi, slp_tree node,
1635 tree builtin_decl, tree vectype,
1636 VEC(tree,heap) *dr_chain,
1637 int ncopies, int vect_stmts_counter)
1640 gimple perm_stmt = NULL;
1641 stmt_vec_info next_stmt_info;
1642 int i, group_size, stride, dr_chain_size;
1643 tree first_vec, second_vec, data_ref;
1644 VEC (tree, heap) *params = NULL;
1646 group_size = VEC_length (gimple, SLP_TREE_SCALAR_STMTS (node));
1647 stride = SLP_TREE_NUMBER_OF_VEC_STMTS (node) / ncopies;
1648 dr_chain_size = VEC_length (tree, dr_chain);
1650 /* Initialize the vect stmts of NODE to properly insert the generated
1652 for (i = VEC_length (gimple, SLP_TREE_VEC_STMTS (node));
1653 i < (int) SLP_TREE_NUMBER_OF_VEC_STMTS (node); i++)
1654 VEC_quick_push (gimple, SLP_TREE_VEC_STMTS (node), NULL);
1656 perm_dest = vect_create_destination_var (gimple_assign_lhs (stmt), vectype);
1657 for (i = 0; i < ncopies; i++)
1659 first_vec = VEC_index (tree, dr_chain, first_vec_indx);
1660 second_vec = VEC_index (tree, dr_chain, second_vec_indx);
1662 /* Build argument list for the vectorized call. */
1663 VEC_free (tree, heap, params);
1664 params = VEC_alloc (tree, heap, 3);
1665 VEC_quick_push (tree, params, first_vec);
1666 VEC_quick_push (tree, params, second_vec);
1667 VEC_quick_push (tree, params, mask);
1669 /* Generate the permute statement. */
1670 perm_stmt = gimple_build_call_vec (builtin_decl, params);
1671 data_ref = make_ssa_name (perm_dest, perm_stmt);
1672 gimple_call_set_lhs (perm_stmt, data_ref);
1673 vect_finish_stmt_generation (stmt, perm_stmt, gsi);
1675 /* Store the vector statement in NODE. */
1676 VEC_replace (gimple, SLP_TREE_VEC_STMTS (node),
1677 stride * i + vect_stmts_counter, perm_stmt);
1679 first_vec_indx += stride;
1680 second_vec_indx += stride;
1683 /* Mark the scalar stmt as vectorized. */
1684 next_stmt_info = vinfo_for_stmt (next_scalar_stmt);
1685 STMT_VINFO_VEC_STMT (next_stmt_info) = perm_stmt;
1689 /* Given FIRST_MASK_ELEMENT - the mask element in element representation,
1690 return in CURRENT_MASK_ELEMENT its equivalent in target specific
1691 representation. Check that the mask is valid and return FALSE if not.
1692 Return TRUE in NEED_NEXT_VECTOR if the permutation requires to move to
1693 the next vector, i.e., the current first vector is not needed. */
1696 vect_get_mask_element (gimple stmt, int first_mask_element, int m,
1697 int mask_nunits, bool only_one_vec, int index,
1698 int *mask, int *current_mask_element,
1699 bool *need_next_vector)
1702 static int number_of_mask_fixes = 1;
1703 static bool mask_fixed = false;
1704 static bool needs_first_vector = false;
1706 /* Convert to target specific representation. */
1707 *current_mask_element = first_mask_element + m;
1708 /* Adjust the value in case it's a mask for second and third vectors. */
1709 *current_mask_element -= mask_nunits * (number_of_mask_fixes - 1);
1711 if (*current_mask_element < mask_nunits)
1712 needs_first_vector = true;
1714 /* We have only one input vector to permute but the mask accesses values in
1715 the next vector as well. */
1716 if (only_one_vec && *current_mask_element >= mask_nunits)
1718 if (vect_print_dump_info (REPORT_DETAILS))
1720 fprintf (vect_dump, "permutation requires at least two vectors ");
1721 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
1727 /* The mask requires the next vector. */
1728 if (*current_mask_element >= mask_nunits * 2)
1730 if (needs_first_vector || mask_fixed)
1732 /* We either need the first vector too or have already moved to the
1733 next vector. In both cases, this permutation needs three
1735 if (vect_print_dump_info (REPORT_DETAILS))
1737 fprintf (vect_dump, "permutation requires at "
1738 "least three vectors ");
1739 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
1745 /* We move to the next vector, dropping the first one and working with
1746 the second and the third - we need to adjust the values of the mask
1748 *current_mask_element -= mask_nunits * number_of_mask_fixes;
1750 for (i = 0; i < index; i++)
1751 mask[i] -= mask_nunits * number_of_mask_fixes;
1753 (number_of_mask_fixes)++;
1757 *need_next_vector = mask_fixed;
1759 /* This was the last element of this mask. Start a new one. */
1760 if (index == mask_nunits - 1)
1762 number_of_mask_fixes = 1;
1764 needs_first_vector = false;
1771 /* Generate vector permute statements from a list of loads in DR_CHAIN.
1772 If ANALYZE_ONLY is TRUE, only check that it is possible to create valid
1773 permute statements for SLP_NODE_INSTANCE. */
1775 vect_transform_slp_perm_load (gimple stmt, VEC (tree, heap) *dr_chain,
1776 gimple_stmt_iterator *gsi, int vf,
1777 slp_instance slp_node_instance, bool analyze_only)
1779 stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
1780 tree mask_element_type = NULL_TREE, mask_type;
1781 int i, j, k, m, scale, mask_nunits, nunits, vec_index = 0, scalar_index;
1783 tree vectype = STMT_VINFO_VECTYPE (stmt_info), builtin_decl;
1784 gimple next_scalar_stmt;
1785 int group_size = SLP_INSTANCE_GROUP_SIZE (slp_node_instance);
1786 int first_mask_element;
1787 int index, unroll_factor, *mask, current_mask_element, ncopies;
1788 bool only_one_vec = false, need_next_vector = false;
1789 int first_vec_index, second_vec_index, orig_vec_stmts_num, vect_stmts_counter;
1791 if (!targetm.vectorize.builtin_vec_perm)
1793 if (vect_print_dump_info (REPORT_DETAILS))
1795 fprintf (vect_dump, "no builtin for vect permute for ");
1796 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
1802 builtin_decl = targetm.vectorize.builtin_vec_perm (vectype,
1803 &mask_element_type);
1804 if (!builtin_decl || !mask_element_type)
1806 if (vect_print_dump_info (REPORT_DETAILS))
1808 fprintf (vect_dump, "no builtin for vect permute for ");
1809 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
1815 mask_type = get_vectype_for_scalar_type (mask_element_type);
1816 mask_nunits = TYPE_VECTOR_SUBPARTS (mask_type);
1817 mask = (int *) xmalloc (sizeof (int) * mask_nunits);
1818 nunits = TYPE_VECTOR_SUBPARTS (vectype);
1819 scale = mask_nunits / nunits;
1820 unroll_factor = SLP_INSTANCE_UNROLLING_FACTOR (slp_node_instance);
1822 /* The number of vector stmts to generate based only on SLP_NODE_INSTANCE
1823 unrolling factor. */
1824 orig_vec_stmts_num = group_size *
1825 SLP_INSTANCE_UNROLLING_FACTOR (slp_node_instance) / nunits;
1826 if (orig_vec_stmts_num == 1)
1827 only_one_vec = true;
1829 /* Number of copies is determined by the final vectorization factor
1830 relatively to SLP_NODE_INSTANCE unrolling factor. */
1831 ncopies = vf / SLP_INSTANCE_UNROLLING_FACTOR (slp_node_instance);
1833 /* Generate permutation masks for every NODE. Number of masks for each NODE
1834 is equal to GROUP_SIZE.
1835 E.g., we have a group of three nodes with three loads from the same
1836 location in each node, and the vector size is 4. I.e., we have a
1837 a0b0c0a1b1c1... sequence and we need to create the following vectors:
1838 for a's: a0a0a0a1 a1a1a2a2 a2a3a3a3
1839 for b's: b0b0b0b1 b1b1b2b2 b2b3b3b3
1842 The masks for a's should be: {0,0,0,3} {3,3,6,6} {6,9,9,9} (in target
1843 scpecific type, e.g., in bytes for Altivec.
1844 The last mask is illegal since we assume two operands for permute
1845 operation, and the mask element values can't be outside that range. Hence,
1846 the last mask must be converted into {2,5,5,5}.
1847 For the first two permutations we need the first and the second input
1848 vectors: {a0,b0,c0,a1} and {b1,c1,a2,b2}, and for the last permutation
1849 we need the second and the third vectors: {b1,c1,a2,b2} and
1853 VEC_iterate (slp_tree, SLP_INSTANCE_LOADS (slp_node_instance),
1859 vect_stmts_counter = 0;
1861 first_vec_index = vec_index++;
1863 second_vec_index = first_vec_index;
1865 second_vec_index = vec_index++;
1867 for (j = 0; j < unroll_factor; j++)
1869 for (k = 0; k < group_size; k++)
1871 first_mask_element = (i + j * group_size) * scale;
1872 for (m = 0; m < scale; m++)
1874 if (!vect_get_mask_element (stmt, first_mask_element, m,
1875 mask_nunits, only_one_vec, index, mask,
1876 ¤t_mask_element, &need_next_vector))
1879 mask[index++] = current_mask_element;
1882 if (index == mask_nunits)
1884 tree mask_vec = NULL;
1886 while (--index >= 0)
1888 tree t = build_int_cst (mask_element_type, mask[index]);
1889 mask_vec = tree_cons (NULL, t, mask_vec);
1891 mask_vec = build_vector (mask_type, mask_vec);
1894 if (!targetm.vectorize.builtin_vec_perm_ok (vectype,
1897 if (vect_print_dump_info (REPORT_DETAILS))
1899 fprintf (vect_dump, "unsupported vect permute ");
1900 print_generic_expr (vect_dump, mask_vec, 0);
1908 if (need_next_vector)
1910 first_vec_index = second_vec_index;
1911 second_vec_index = vec_index;
1914 next_scalar_stmt = VEC_index (gimple,
1915 SLP_TREE_SCALAR_STMTS (node), scalar_index++);
1917 vect_create_mask_and_perm (stmt, next_scalar_stmt,
1918 mask_vec, first_vec_index, second_vec_index,
1919 gsi, node, builtin_decl, vectype, dr_chain,
1920 ncopies, vect_stmts_counter++);
1933 /* Vectorize SLP instance tree in postorder. */
1936 vect_schedule_slp_instance (slp_tree node, slp_instance instance,
1937 unsigned int vectorization_factor)
1940 bool strided_store, is_store;
1941 gimple_stmt_iterator si;
1942 stmt_vec_info stmt_info;
1943 unsigned int vec_stmts_size, nunits, group_size;
1946 slp_tree loads_node;
1951 vect_schedule_slp_instance (SLP_TREE_LEFT (node), instance,
1952 vectorization_factor);
1953 vect_schedule_slp_instance (SLP_TREE_RIGHT (node), instance,
1954 vectorization_factor);
1956 stmt = VEC_index (gimple, SLP_TREE_SCALAR_STMTS (node), 0);
1957 stmt_info = vinfo_for_stmt (stmt);
1959 /* VECTYPE is the type of the destination. */
1960 vectype = get_vectype_for_scalar_type (TREE_TYPE (gimple_assign_lhs (stmt)));
1961 nunits = (unsigned int) TYPE_VECTOR_SUBPARTS (vectype);
1962 group_size = SLP_INSTANCE_GROUP_SIZE (instance);
1964 /* For each SLP instance calculate number of vector stmts to be created
1965 for the scalar stmts in each node of the SLP tree. Number of vector
1966 elements in one vector iteration is the number of scalar elements in
1967 one scalar iteration (GROUP_SIZE) multiplied by VF divided by vector
1969 vec_stmts_size = (vectorization_factor * group_size) / nunits;
1971 /* In case of load permutation we have to allocate vectorized statements for
1972 all the nodes that participate in that permutation. */
1973 if (SLP_INSTANCE_LOAD_PERMUTATION (instance))
1976 VEC_iterate (slp_tree, SLP_INSTANCE_LOADS (instance), i, loads_node);
1979 if (!SLP_TREE_VEC_STMTS (loads_node))
1981 SLP_TREE_VEC_STMTS (loads_node) = VEC_alloc (gimple, heap,
1983 SLP_TREE_NUMBER_OF_VEC_STMTS (loads_node) = vec_stmts_size;
1988 if (!SLP_TREE_VEC_STMTS (node))
1990 SLP_TREE_VEC_STMTS (node) = VEC_alloc (gimple, heap, vec_stmts_size);
1991 SLP_TREE_NUMBER_OF_VEC_STMTS (node) = vec_stmts_size;
1994 if (vect_print_dump_info (REPORT_DETAILS))
1996 fprintf (vect_dump, "------>vectorizing SLP node starting from: ");
1997 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
2000 /* Loads should be inserted before the first load. */
2001 if (SLP_INSTANCE_FIRST_LOAD_STMT (instance)
2002 && STMT_VINFO_STRIDED_ACCESS (stmt_info)
2003 && !REFERENCE_CLASS_P (gimple_get_lhs (stmt)))
2004 si = gsi_for_stmt (SLP_INSTANCE_FIRST_LOAD_STMT (instance));
2006 si = gsi_for_stmt (stmt);
2008 is_store = vect_transform_stmt (stmt, &si, &strided_store, node, instance);
2011 if (DR_GROUP_FIRST_DR (stmt_info))
2012 /* If IS_STORE is TRUE, the vectorization of the
2013 interleaving chain was completed - free all the stores in
2015 vect_remove_stores (DR_GROUP_FIRST_DR (stmt_info));
2017 /* FORNOW: SLP originates only from strided stores. */
2023 /* FORNOW: SLP originates only from strided stores. */
2029 vect_schedule_slp (loop_vec_info loop_vinfo, bb_vec_info bb_vinfo)
2031 VEC (slp_instance, heap) *slp_instances;
2032 slp_instance instance;
2034 bool is_store = false;
2038 slp_instances = LOOP_VINFO_SLP_INSTANCES (loop_vinfo);
2039 vf = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
2043 slp_instances = BB_VINFO_SLP_INSTANCES (bb_vinfo);
2047 for (i = 0; VEC_iterate (slp_instance, slp_instances, i, instance); i++)
2049 /* Schedule the tree of INSTANCE. */
2050 is_store = vect_schedule_slp_instance (SLP_INSTANCE_TREE (instance),
2052 if (vect_print_dump_info (REPORT_VECTORIZED_LOCATIONS)
2053 || vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
2054 fprintf (vect_dump, "vectorizing stmts using SLP.");
2061 /* Vectorize the basic block. */
2064 vect_slp_transform_bb (basic_block bb)
2066 bb_vec_info bb_vinfo = vec_info_for_bb (bb);
2067 gimple_stmt_iterator si;
2069 gcc_assert (bb_vinfo);
2071 if (vect_print_dump_info (REPORT_DETAILS))
2072 fprintf (vect_dump, "SLPing BB\n");
2074 for (si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&si))
2076 gimple stmt = gsi_stmt (si);
2077 stmt_vec_info stmt_info;
2079 if (vect_print_dump_info (REPORT_DETAILS))
2081 fprintf (vect_dump, "------>SLPing statement: ");
2082 print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
2085 stmt_info = vinfo_for_stmt (stmt);
2086 gcc_assert (stmt_info);
2088 /* Schedule all the SLP instances when the first SLP stmt is reached. */
2089 if (STMT_SLP_TYPE (stmt_info))
2091 vect_schedule_slp (NULL, bb_vinfo);
2096 mark_sym_for_renaming (gimple_vop (cfun));
2097 /* The memory tags and pointers in vectorized statements need to
2098 have their SSA forms updated. FIXME, why can't this be delayed
2099 until all the loops have been transformed? */
2100 update_ssa (TODO_update_ssa);
2102 if (vect_print_dump_info (REPORT_DETAILS))
2103 fprintf (vect_dump, "BASIC BLOCK VECTORIZED\n");
2105 destroy_bb_vec_info (bb_vinfo);