gcc/tree-vectorizer.h

   1 /* Vectorizer
   2    Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4    Contributed by Dorit Naishlos <dorit@il.ibm.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_TREE_VECTORIZER_H
  23 #define GCC_TREE_VECTORIZER_H
  24
  25 #include "tree-data-ref.h"
  26
  27 typedef source_location LOC;
  28 #define UNKNOWN_LOC UNKNOWN_LOCATION
  29 #define EXPR_LOC(e) EXPR_LOCATION(e)
  30 #define LOC_FILE(l) LOCATION_FILE (l)
  31 #define LOC_LINE(l) LOCATION_LINE (l)
  32
  33 /* Used for naming of new temporaries.  */
  34 enum vect_var_kind {
  35   vect_simple_var,
  36   vect_pointer_var,
  37   vect_scalar_var
  38 };
  39
  40 /* Defines type of operation.  */
  41 enum operation_type {
  42   unary_op = 1,
  43   binary_op,
  44   ternary_op
  45 };
  46
  47 /* Define type of available alignment support.  */
  48 enum dr_alignment_support {
  49   dr_unaligned_unsupported,
  50   dr_unaligned_supported,
  51   dr_explicit_realign,
  52   dr_explicit_realign_optimized,
  53   dr_aligned
  54 };
  55
  56 /* Define type of def-use cross-iteration cycle.  */
  57 enum vect_def_type {
  58   vect_uninitialized_def = 0,
  59   vect_constant_def = 1,
  60   vect_external_def,
  61   vect_internal_def,
  62   vect_induction_def,
  63   vect_reduction_def,
  64   vect_double_reduction_def,
  65   vect_nested_cycle,
  66   vect_unknown_def_type
  67 };
  68
  69 #define VECTORIZABLE_CYCLE_DEF(D) (((D) == vect_reduction_def)           \
  70                                    || ((D) == vect_double_reduction_def) \
  71                                    || ((D) == vect_nested_cycle))
  72
  73 /* Define verbosity levels.  */
  74 enum verbosity_levels {
  75   REPORT_NONE,
  76   REPORT_VECTORIZED_LOCATIONS,
  77   REPORT_UNVECTORIZED_LOCATIONS,
  78   REPORT_COST,
  79   REPORT_ALIGNMENT,
  80   REPORT_DR_DETAILS,
  81   REPORT_BAD_FORM_LOOPS,
  82   REPORT_OUTER_LOOPS,
  83   REPORT_SLP,
  84   REPORT_DETAILS,
  85   /* New verbosity levels should be added before this one.  */
  86   MAX_VERBOSITY_LEVEL
  87 };
  88
  89 /************************************************************************
  90   SLP
  91  ************************************************************************/
  92
  93 /* A computation tree of an SLP instance. Each node corresponds to a group of
  94    stmts to be packed in a SIMD stmt.  */
  95 typedef struct _slp_tree {
  96   /* Only binary and unary operations are supported. LEFT child corresponds to
  97      the first operand and RIGHT child to the second if the operation is
  98      binary.  */
  99   struct _slp_tree *left;
 100   struct _slp_tree *right;
 101   /* A group of scalar stmts to be vectorized together.  */
 102   VEC (gimple, heap) *stmts;
 103   /* Vectorized stmt/s.  */
 104   VEC (gimple, heap) *vec_stmts;
 105   /* Number of vector stmts that are created to replace the group of scalar
 106      stmts. It is calculated during the transformation phase as the number of
 107      scalar elements in one scalar iteration (GROUP_SIZE) multiplied by VF
 108      divided by vector size.  */
 109   unsigned int vec_stmts_size;
 110   /* Vectorization costs associated with SLP node.  */
 111   struct
 112   {
 113     int outside_of_loop;     /* Statements generated outside loop.  */
 114     int inside_of_loop;      /* Statements generated inside loop.  */
 115   } cost;
 116 } *slp_tree;
 117
 118 DEF_VEC_P(slp_tree);
 119 DEF_VEC_ALLOC_P(slp_tree, heap);
 120
 121 /* SLP instance is a sequence of stmts in a loop that can be packed into
 122    SIMD stmts.  */
 123 typedef struct _slp_instance {
 124   /* The root of SLP tree.  */
 125   slp_tree root;
 126
 127   /* Size of groups of scalar stmts that will be replaced by SIMD stmt/s.  */
 128   unsigned int group_size;
 129
 130   /* The unrolling factor required to vectorized this SLP instance.  */
 131   unsigned int unrolling_factor;
 132
 133   /* Vectorization costs associated with SLP instance.  */
 134   struct
 135   {
 136     int outside_of_loop;     /* Statements generated outside loop.  */
 137     int inside_of_loop;      /* Statements generated inside loop.  */
 138   } cost;
 139
 140   /* Loads permutation relatively to the stores, NULL if there is no
 141      permutation.  */
 142   VEC (int, heap) *load_permutation;
 143
 144   /* The group of nodes that contain loads of this SLP instance.  */
 145   VEC (slp_tree, heap) *loads;
 146
 147   /* The first scalar load of the instance. The created vector loads will be
 148      inserted before this statement.  */
 149   gimple first_load;
 150 } *slp_instance;
 151
 152 DEF_VEC_P(slp_instance);
 153 DEF_VEC_ALLOC_P(slp_instance, heap);
 154
 155 /* Access Functions.  */
 156 #define SLP_INSTANCE_TREE(S)                     (S)->root
 157 #define SLP_INSTANCE_GROUP_SIZE(S)               (S)->group_size
 158 #define SLP_INSTANCE_UNROLLING_FACTOR(S)         (S)->unrolling_factor
 159 #define SLP_INSTANCE_OUTSIDE_OF_LOOP_COST(S)     (S)->cost.outside_of_loop
 160 #define SLP_INSTANCE_INSIDE_OF_LOOP_COST(S)      (S)->cost.inside_of_loop
 161 #define SLP_INSTANCE_LOAD_PERMUTATION(S)         (S)->load_permutation
 162 #define SLP_INSTANCE_LOADS(S)                    (S)->loads
 163 #define SLP_INSTANCE_FIRST_LOAD_STMT(S)          (S)->first_load
 164
 165 #define SLP_TREE_LEFT(S)                         (S)->left
 166 #define SLP_TREE_RIGHT(S)                        (S)->right
 167 #define SLP_TREE_SCALAR_STMTS(S)                 (S)->stmts
 168 #define SLP_TREE_VEC_STMTS(S)                    (S)->vec_stmts
 169 #define SLP_TREE_NUMBER_OF_VEC_STMTS(S)          (S)->vec_stmts_size
 170 #define SLP_TREE_OUTSIDE_OF_LOOP_COST(S)         (S)->cost.outside_of_loop
 171 #define SLP_TREE_INSIDE_OF_LOOP_COST(S)          (S)->cost.inside_of_loop
 172
 173 /*-----------------------------------------------------------------*/
 174 /* Info on vectorized loops.                                       */
 175 /*-----------------------------------------------------------------*/
 176 typedef struct _loop_vec_info {
 177
 178   /* The loop to which this info struct refers to.  */
 179   struct loop *loop;
 180
 181   /* The loop basic blocks.  */
 182   basic_block *bbs;
 183
 184   /* Number of iterations.  */
 185   tree num_iters;
 186   tree num_iters_unchanged;
 187
 188   /* Minimum number of iterations below which vectorization is expected to
 189      not be profitable (as estimated by the cost model).
 190      -1 indicates that vectorization will not be profitable.
 191      FORNOW: This field is an int. Will be a tree in the future, to represent
 192              values unknown at compile time.  */
 193   int min_profitable_iters;
 194
 195   /* Is the loop vectorizable? */
 196   bool vectorizable;
 197
 198   /* Unrolling factor  */
 199   int vectorization_factor;
 200
 201   /* The loop location in the source.  */
 202   LOC loop_line_number;
 203
 204   /* Unknown DRs according to which loop was peeled.  */
 205   struct data_reference *unaligned_dr;
 206
 207   /* peeling_for_alignment indicates whether peeling for alignment will take
 208      place, and what the peeling factor should be:
 209      peeling_for_alignment = X means:
 210         If X=0: Peeling for alignment will not be applied.
 211         If X>0: Peel first X iterations.
 212         If X=-1: Generate a runtime test to calculate the number of iterations
 213                  to be peeled, using the dataref recorded in the field
 214                  unaligned_dr.  */
 215   int peeling_for_alignment;
 216
 217   /* The mask used to check the alignment of pointers or arrays.  */
 218   int ptr_mask;
 219
 220   /* All data references in the loop.  */
 221   VEC (data_reference_p, heap) *datarefs;
 222
 223   /* All data dependences in the loop.  */
 224   VEC (ddr_p, heap) *ddrs;
 225
 226   /* Data Dependence Relations defining address ranges that are candidates
 227      for a run-time aliasing check.  */
 228   VEC (ddr_p, heap) *may_alias_ddrs;
 229
 230   /* Statements in the loop that have data references that are candidates for a
 231      runtime (loop versioning) misalignment check.  */
 232   VEC(gimple,heap) *may_misalign_stmts;
 233
 234   /* All interleaving chains of stores in the loop, represented by the first
 235      stmt in the chain.  */
 236   VEC(gimple, heap) *strided_stores;
 237
 238   /* All SLP instances in the loop. This is a subset of the set of STRIDED_STORES
 239      of the loop.  */
 240   VEC(slp_instance, heap) *slp_instances;
 241
 242   /* The unrolling factor needed to SLP the loop. In case of that pure SLP is
 243      applied to the loop, i.e., no unrolling is needed, this is 1.  */
 244   unsigned slp_unrolling_factor;
 245
 246   /* Reduction cycles detected in the loop. Used in loop-aware SLP.  */
 247   VEC (gimple, heap) *reductions;
 248 } *loop_vec_info;
 249
 250 /* Access Functions.  */
 251 #define LOOP_VINFO_LOOP(L)                 (L)->loop
 252 #define LOOP_VINFO_BBS(L)                  (L)->bbs
 253 #define LOOP_VINFO_NITERS(L)               (L)->num_iters
 254 /* Since LOOP_VINFO_NITERS can change after prologue peeling
 255    retain total unchanged scalar loop iterations for cost model.  */
 256 #define LOOP_VINFO_NITERS_UNCHANGED(L)     (L)->num_iters_unchanged
 257 #define LOOP_VINFO_COST_MODEL_MIN_ITERS(L) (L)->min_profitable_iters
 258 #define LOOP_VINFO_VECTORIZABLE_P(L)       (L)->vectorizable
 259 #define LOOP_VINFO_VECT_FACTOR(L)          (L)->vectorization_factor
 260 #define LOOP_VINFO_PTR_MASK(L)             (L)->ptr_mask
 261 #define LOOP_VINFO_DATAREFS(L)             (L)->datarefs
 262 #define LOOP_VINFO_DDRS(L)                 (L)->ddrs
 263 #define LOOP_VINFO_INT_NITERS(L)           (TREE_INT_CST_LOW ((L)->num_iters))
 264 #define LOOP_PEELING_FOR_ALIGNMENT(L)      (L)->peeling_for_alignment
 265 #define LOOP_VINFO_UNALIGNED_DR(L)         (L)->unaligned_dr
 266 #define LOOP_VINFO_MAY_MISALIGN_STMTS(L)   (L)->may_misalign_stmts
 267 #define LOOP_VINFO_LOC(L)                  (L)->loop_line_number
 268 #define LOOP_VINFO_MAY_ALIAS_DDRS(L)       (L)->may_alias_ddrs
 269 #define LOOP_VINFO_STRIDED_STORES(L)       (L)->strided_stores
 270 #define LOOP_VINFO_SLP_INSTANCES(L)        (L)->slp_instances
 271 #define LOOP_VINFO_SLP_UNROLLING_FACTOR(L) (L)->slp_unrolling_factor
 272 #define LOOP_VINFO_REDUCTIONS(L)           (L)->reductions
 273
 274 #define LOOP_REQUIRES_VERSIONING_FOR_ALIGNMENT(L) \
 275 VEC_length (gimple, (L)->may_misalign_stmts) > 0
 276 #define LOOP_REQUIRES_VERSIONING_FOR_ALIAS(L)     \
 277 VEC_length (ddr_p, (L)->may_alias_ddrs) > 0
 278
 279 #define NITERS_KNOWN_P(n)                     \
 280 (host_integerp ((n),0)                        \
 281 && TREE_INT_CST_LOW ((n)) > 0)
 282
 283 #define LOOP_VINFO_NITERS_KNOWN_P(L)          \
 284 NITERS_KNOWN_P((L)->num_iters)
 285
 286 static inline loop_vec_info
 287 loop_vec_info_for_loop (struct loop *loop)
 288 {
 289   return (loop_vec_info) loop->aux;
 290 }
 291
 292 static inline bool
 293 nested_in_vect_loop_p (struct loop *loop, gimple stmt)
 294 {
 295   return (loop->inner
 296           && (loop->inner == (gimple_bb (stmt))->loop_father));
 297 }
 298
 299 typedef struct _bb_vec_info {
 300
 301   basic_block bb;
 302   /* All interleaving chains of stores in the basic block, represented by the
 303      first stmt in the chain.  */
 304   VEC(gimple, heap) *strided_stores;
 305
 306   /* All SLP instances in the basic block. This is a subset of the set of
 307      STRIDED_STORES of the basic block.  */
 308   VEC(slp_instance, heap) *slp_instances;
 309
 310   /* All data references in the basic block.  */
 311   VEC (data_reference_p, heap) *datarefs;
 312
 313   /* All data dependences in the basic block.  */
 314   VEC (ddr_p, heap) *ddrs;
 315 } *bb_vec_info;
 316
 317 #define BB_VINFO_BB(B)              (B)->bb
 318 #define BB_VINFO_STRIDED_STORES(B)  (B)->strided_stores
 319 #define BB_VINFO_SLP_INSTANCES(B)   (B)->slp_instances
 320 #define BB_VINFO_DATAREFS(B)        (B)->datarefs
 321 #define BB_VINFO_DDRS(B)            (B)->ddrs
 322
 323 static inline bb_vec_info
 324 vec_info_for_bb (basic_block bb)
 325 {
 326   return (bb_vec_info) bb->aux;
 327 }
 328
 329 /*-----------------------------------------------------------------*/
 330 /* Info on vectorized defs.                                        */
 331 /*-----------------------------------------------------------------*/
 332 enum stmt_vec_info_type {
 333   undef_vec_info_type = 0,
 334   load_vec_info_type,
 335   store_vec_info_type,
 336   op_vec_info_type,
 337   call_vec_info_type,
 338   assignment_vec_info_type,
 339   condition_vec_info_type,
 340   reduc_vec_info_type,
 341   induc_vec_info_type,
 342   type_promotion_vec_info_type,
 343   type_demotion_vec_info_type,
 344   type_conversion_vec_info_type,
 345   loop_exit_ctrl_vec_info_type
 346 };
 347
 348 /* Indicates whether/how a variable is used in the scope of loop/basic
 349    block.  */
 350 enum vect_relevant {
 351   vect_unused_in_scope = 0,
 352   /* The def is in the inner loop, and the use is in the outer loop, and the
 353      use is a reduction stmt.  */
 354   vect_used_in_outer_by_reduction,
 355   /* The def is in the inner loop, and the use is in the outer loop (and is
 356      not part of reduction).  */
 357   vect_used_in_outer,
 358
 359   /* defs that feed computations that end up (only) in a reduction. These
 360      defs may be used by non-reduction stmts, but eventually, any
 361      computations/values that are affected by these defs are used to compute
 362      a reduction (i.e. don't get stored to memory, for example). We use this
 363      to identify computations that we can change the order in which they are
 364      computed.  */
 365   vect_used_by_reduction,
 366
 367   vect_used_in_scope
 368 };
 369
 370 /* The type of vectorization that can be applied to the stmt: regular loop-based
 371    vectorization; pure SLP - the stmt is a part of SLP instances and does not
 372    have uses outside SLP instances; or hybrid SLP and loop-based - the stmt is
 373    a part of SLP instance and also must be loop-based vectorized, since it has
 374    uses outside SLP sequences.
 375
 376    In the loop context the meanings of pure and hybrid SLP are slightly
 377    different. By saying that pure SLP is applied to the loop, we mean that we
 378    exploit only intra-iteration parallelism in the loop; i.e., the loop can be
 379    vectorized without doing any conceptual unrolling, cause we don't pack
 380    together stmts from different iterations, only within a single iteration.
 381    Loop hybrid SLP means that we exploit both intra-iteration and
 382    inter-iteration parallelism (e.g., number of elements in the vector is 4
 383    and the slp-group-size is 2, in which case we don't have enough parallelism
 384    within an iteration, so we obtain the rest of the parallelism from subsequent
 385    iterations by unrolling the loop by 2).  */
 386 enum slp_vect_type {
 387   loop_vect = 0,
 388   pure_slp,
 389   hybrid
 390 };
 391
 392
 393 typedef struct data_reference *dr_p;
 394 DEF_VEC_P(dr_p);
 395 DEF_VEC_ALLOC_P(dr_p,heap);
 396
 397 typedef struct _stmt_vec_info {
 398
 399   enum stmt_vec_info_type type;
 400
 401   /* Indicates whether this stmts is part of a computation whose result is
 402      used outside the loop.  */
 403   bool live;
 404
 405   /* Stmt is part of some pattern (computation idiom)  */
 406   bool in_pattern_p;
 407
 408   /* For loads only, if there is a store with the same location, this field is
 409      TRUE.  */
 410   bool read_write_dep;
 411
 412   /* The stmt to which this info struct refers to.  */
 413   gimple stmt;
 414
 415   /* The loop_vec_info with respect to which STMT is vectorized.  */
 416   loop_vec_info loop_vinfo;
 417
 418   /* The vector type to be used for the LHS of this statement.  */
 419   tree vectype;
 420
 421   /* The vectorized version of the stmt.  */
 422   gimple vectorized_stmt;
 423
 424
 425   /** The following is relevant only for stmts that contain a non-scalar
 426      data-ref (array/pointer/struct access). A GIMPLE stmt is expected to have
 427      at most one such data-ref.  **/
 428
 429   /* Information about the data-ref (access function, etc),
 430      relative to the inner-most containing loop.  */
 431   struct data_reference *data_ref_info;
 432
 433   /* Information about the data-ref relative to this loop
 434      nest (the loop that is being considered for vectorization).  */
 435   tree dr_base_address;
 436   tree dr_init;
 437   tree dr_offset;
 438   tree dr_step;
 439   tree dr_aligned_to;
 440
 441   /* Used for various bookkeeping purposes, generally holding a pointer to
 442      some other stmt S that is in some way "related" to this stmt.
 443      Current use of this field is:
 444         If this stmt is part of a pattern (i.e. the field 'in_pattern_p' is
 445         true): S is the "pattern stmt" that represents (and replaces) the
 446         sequence of stmts that constitutes the pattern.  Similarly, the
 447         related_stmt of the "pattern stmt" points back to this stmt (which is
 448         the last stmt in the original sequence of stmts that constitutes the
 449         pattern).  */
 450   gimple related_stmt;
 451
 452   /* List of datarefs that are known to have the same alignment as the dataref
 453      of this stmt.  */
 454   VEC(dr_p,heap) *same_align_refs;
 455
 456   /* Classify the def of this stmt.  */
 457   enum vect_def_type def_type;
 458
 459   /*  Whether the stmt is SLPed, loop-based vectorized, or both.  */
 460   enum slp_vect_type slp_type;
 461
 462   /* Interleaving info.  */
 463   /* First data-ref in the interleaving group.  */
 464   gimple first_dr;
 465   /* Pointer to the next data-ref in the group.  */
 466   gimple next_dr;
 467   /* In case that two or more stmts share data-ref, this is the pointer to the
 468      previously detected stmt with the same dr.  */
 469   gimple same_dr_stmt;
 470   /* The size of the interleaving group.  */
 471   unsigned int size;
 472   /* For stores, number of stores from this group seen. We vectorize the last
 473      one.  */
 474   unsigned int store_count;
 475   /* For loads only, the gap from the previous load. For consecutive loads, GAP
 476      is 1.  */
 477   unsigned int gap;
 478
 479   /* Not all stmts in the loop need to be vectorized. e.g, the increment
 480      of the loop induction variable and computation of array indexes. relevant
 481      indicates whether the stmt needs to be vectorized.  */
 482   enum vect_relevant relevant;
 483
 484   /* Vectorization costs associated with statement.  */
 485   struct
 486   {
 487     int outside_of_loop;     /* Statements generated outside loop.  */
 488     int inside_of_loop;      /* Statements generated inside loop.  */
 489   } cost;
 490
 491   /* The bb_vec_info with respect to which STMT is vectorized.  */
 492   bb_vec_info bb_vinfo;
 493
 494   /* Is this statement vectorizable or should it be skipped in (partial)
 495      vectorization.  */
 496   bool vectorizable;
 497 } *stmt_vec_info;
 498
 499 /* Access Functions.  */
 500 #define STMT_VINFO_TYPE(S)                 (S)->type
 501 #define STMT_VINFO_STMT(S)                 (S)->stmt
 502 #define STMT_VINFO_LOOP_VINFO(S)           (S)->loop_vinfo
 503 #define STMT_VINFO_BB_VINFO(S)             (S)->bb_vinfo
 504 #define STMT_VINFO_RELEVANT(S)             (S)->relevant
 505 #define STMT_VINFO_LIVE_P(S)               (S)->live
 506 #define STMT_VINFO_VECTYPE(S)              (S)->vectype
 507 #define STMT_VINFO_VEC_STMT(S)             (S)->vectorized_stmt
 508 #define STMT_VINFO_VECTORIZABLE(S)         (S)->vectorizable
 509 #define STMT_VINFO_DATA_REF(S)             (S)->data_ref_info
 510
 511 #define STMT_VINFO_DR_BASE_ADDRESS(S)      (S)->dr_base_address
 512 #define STMT_VINFO_DR_INIT(S)              (S)->dr_init
 513 #define STMT_VINFO_DR_OFFSET(S)            (S)->dr_offset
 514 #define STMT_VINFO_DR_STEP(S)              (S)->dr_step
 515 #define STMT_VINFO_DR_ALIGNED_TO(S)        (S)->dr_aligned_to
 516
 517 #define STMT_VINFO_IN_PATTERN_P(S)         (S)->in_pattern_p
 518 #define STMT_VINFO_RELATED_STMT(S)         (S)->related_stmt
 519 #define STMT_VINFO_SAME_ALIGN_REFS(S)      (S)->same_align_refs
 520 #define STMT_VINFO_DEF_TYPE(S)             (S)->def_type
 521 #define STMT_VINFO_DR_GROUP_FIRST_DR(S)    (S)->first_dr
 522 #define STMT_VINFO_DR_GROUP_NEXT_DR(S)     (S)->next_dr
 523 #define STMT_VINFO_DR_GROUP_SIZE(S)        (S)->size
 524 #define STMT_VINFO_DR_GROUP_STORE_COUNT(S) (S)->store_count
 525 #define STMT_VINFO_DR_GROUP_GAP(S)         (S)->gap
 526 #define STMT_VINFO_DR_GROUP_SAME_DR_STMT(S)(S)->same_dr_stmt
 527 #define STMT_VINFO_DR_GROUP_READ_WRITE_DEPENDENCE(S)  (S)->read_write_dep
 528 #define STMT_VINFO_STRIDED_ACCESS(S)      ((S)->first_dr != NULL)
 529
 530 #define DR_GROUP_FIRST_DR(S)               (S)->first_dr
 531 #define DR_GROUP_NEXT_DR(S)                (S)->next_dr
 532 #define DR_GROUP_SIZE(S)                   (S)->size
 533 #define DR_GROUP_STORE_COUNT(S)            (S)->store_count
 534 #define DR_GROUP_GAP(S)                    (S)->gap
 535 #define DR_GROUP_SAME_DR_STMT(S)           (S)->same_dr_stmt
 536 #define DR_GROUP_READ_WRITE_DEPENDENCE(S)  (S)->read_write_dep
 537
 538 #define STMT_VINFO_RELEVANT_P(S)          ((S)->relevant != vect_unused_in_scope)
 539 #define STMT_VINFO_OUTSIDE_OF_LOOP_COST(S) (S)->cost.outside_of_loop
 540 #define STMT_VINFO_INSIDE_OF_LOOP_COST(S)  (S)->cost.inside_of_loop
 541
 542 #define HYBRID_SLP_STMT(S)                ((S)->slp_type == hybrid)
 543 #define PURE_SLP_STMT(S)                  ((S)->slp_type == pure_slp)
 544 #define STMT_SLP_TYPE(S)                   (S)->slp_type
 545
 546 /* These are some defines for the initial implementation of the vectorizer's
 547    cost model.  These will later be target specific hooks.  */
 548
 549 /* Cost of conditional taken branch.  */
 550 #ifndef TARG_COND_TAKEN_BRANCH_COST
 551 #define TARG_COND_TAKEN_BRANCH_COST        3
 552 #endif
 553
 554 /* Cost of conditional not taken branch.  */
 555 #ifndef TARG_COND_NOT_TAKEN_BRANCH_COST
 556 #define TARG_COND_NOT_TAKEN_BRANCH_COST        1
 557 #endif
 558
 559 /* Cost of any scalar operation, excluding load and store.  */
 560 #ifndef TARG_SCALAR_STMT_COST
 561 #define TARG_SCALAR_STMT_COST           1
 562 #endif
 563
 564 /* Cost of scalar load.  */
 565 #ifndef TARG_SCALAR_LOAD_COST
 566 #define TARG_SCALAR_LOAD_COST           1
 567 #endif
 568
 569 /* Cost of scalar store.  */
 570 #ifndef TARG_SCALAR_STORE_COST
 571 #define TARG_SCALAR_STORE_COST           1
 572 #endif
 573
 574 /* Cost of any vector operation, excluding load, store or vector to scalar
 575    operation.  */
 576 #ifndef TARG_VEC_STMT_COST
 577 #define TARG_VEC_STMT_COST           1
 578 #endif
 579
 580 /* Cost of vector to scalar operation.  */
 581 #ifndef TARG_VEC_TO_SCALAR_COST
 582 #define TARG_VEC_TO_SCALAR_COST      1
 583 #endif
 584
 585 /* Cost of scalar to vector operation.  */
 586 #ifndef TARG_SCALAR_TO_VEC_COST
 587 #define TARG_SCALAR_TO_VEC_COST      1
 588 #endif
 589
 590 /* Cost of aligned vector load.  */
 591 #ifndef TARG_VEC_LOAD_COST
 592 #define TARG_VEC_LOAD_COST           1
 593 #endif
 594
 595 /* Cost of misaligned vector load.  */
 596 #ifndef TARG_VEC_UNALIGNED_LOAD_COST
 597 #define TARG_VEC_UNALIGNED_LOAD_COST 2
 598 #endif
 599
 600 /* Cost of vector store.  */
 601 #ifndef TARG_VEC_STORE_COST
 602 #define TARG_VEC_STORE_COST          1
 603 #endif
 604
 605 /* Cost of vector permutation.  */
 606 #ifndef TARG_VEC_PERMUTE_COST
 607 #define TARG_VEC_PERMUTE_COST          1
 608 #endif
 609
 610 /* The maximum number of intermediate steps required in multi-step type
 611    conversion.  */
 612 #define MAX_INTERM_CVT_STEPS         3
 613
 614 /* The maximum vectorization factor supported by any target (V32QI).  */
 615 #define MAX_VECTORIZATION_FACTOR 32
 616
 617 /* Avoid GTY(()) on stmt_vec_info.  */
 618 typedef void *vec_void_p;
 619 DEF_VEC_P (vec_void_p);
 620 DEF_VEC_ALLOC_P (vec_void_p, heap);
 621
 622 extern VEC(vec_void_p,heap) *stmt_vec_info_vec;
 623
 624 void init_stmt_vec_info_vec (void);
 625 void free_stmt_vec_info_vec (void);
 626
 627 static inline stmt_vec_info
 628 vinfo_for_stmt (gimple stmt)
 629 {
 630   unsigned int uid = gimple_uid (stmt);
 631   if (uid == 0)
 632     return NULL;
 633
 634   gcc_assert (uid <= VEC_length (vec_void_p, stmt_vec_info_vec));
 635   return (stmt_vec_info) VEC_index (vec_void_p, stmt_vec_info_vec, uid - 1);
 636 }
 637
 638 static inline void
 639 set_vinfo_for_stmt (gimple stmt, stmt_vec_info info)
 640 {
 641   unsigned int uid = gimple_uid (stmt);
 642   if (uid == 0)
 643     {
 644       gcc_assert (info);
 645       uid = VEC_length (vec_void_p, stmt_vec_info_vec) + 1;
 646       gimple_set_uid (stmt, uid);
 647       VEC_safe_push (vec_void_p, heap, stmt_vec_info_vec, (vec_void_p) info);
 648     }
 649   else
 650     VEC_replace (vec_void_p, stmt_vec_info_vec, uid - 1, (vec_void_p) info);
 651 }
 652
 653 static inline gimple
 654 get_earlier_stmt (gimple stmt1, gimple stmt2)
 655 {
 656   unsigned int uid1, uid2;
 657
 658   if (stmt1 == NULL)
 659     return stmt2;
 660
 661   if (stmt2 == NULL)
 662     return stmt1;
 663
 664   uid1 = gimple_uid (stmt1);
 665   uid2 = gimple_uid (stmt2);
 666
 667   if (uid1 == 0 || uid2 == 0)
 668     return NULL;
 669
 670   gcc_assert (uid1 <= VEC_length (vec_void_p, stmt_vec_info_vec));
 671   gcc_assert (uid2 <= VEC_length (vec_void_p, stmt_vec_info_vec));
 672
 673   if (uid1 < uid2)
 674     return stmt1;
 675   else
 676     return stmt2;
 677 }
 678
 679 static inline bool
 680 is_pattern_stmt_p (stmt_vec_info stmt_info)
 681 {
 682   gimple related_stmt;
 683   stmt_vec_info related_stmt_info;
 684
 685   related_stmt = STMT_VINFO_RELATED_STMT (stmt_info);
 686   if (related_stmt
 687       && (related_stmt_info = vinfo_for_stmt (related_stmt))
 688       && STMT_VINFO_IN_PATTERN_P (related_stmt_info))
 689     return true;
 690
 691   return false;
 692 }
 693
 694 static inline bool
 695 is_loop_header_bb_p (basic_block bb)
 696 {
 697   if (bb == (bb->loop_father)->header)
 698     return true;
 699   gcc_assert (EDGE_COUNT (bb->preds) == 1);
 700   return false;
 701 }
 702
 703 static inline void
 704 stmt_vinfo_set_inside_of_loop_cost (stmt_vec_info stmt_info, slp_tree slp_node,
 705                                     int cost)
 706 {
 707   if (slp_node)
 708     SLP_TREE_INSIDE_OF_LOOP_COST (slp_node) = cost;
 709   else
 710     STMT_VINFO_INSIDE_OF_LOOP_COST (stmt_info) = cost;
 711 }
 712
 713 static inline void
 714 stmt_vinfo_set_outside_of_loop_cost (stmt_vec_info stmt_info, slp_tree slp_node,
 715                                      int cost)
 716 {
 717   if (slp_node)
 718     SLP_TREE_OUTSIDE_OF_LOOP_COST (slp_node) = cost;
 719   else
 720     STMT_VINFO_OUTSIDE_OF_LOOP_COST (stmt_info) = cost;
 721 }
 722
 723 static inline int
 724 vect_pow2 (int x)
 725 {
 726   int i, res = 1;
 727
 728   for (i = 0; i < x; i++)
 729     res *= 2;
 730
 731   return res;
 732 }
 733
 734 /*-----------------------------------------------------------------*/
 735 /* Info on data references alignment.                              */
 736 /*-----------------------------------------------------------------*/
 737
 738 /* Reflects actual alignment of first access in the vectorized loop,
 739    taking into account peeling/versioning if applied.  */
 740 #define DR_MISALIGNMENT(DR)   ((int) (size_t) (DR)->aux)
 741 #define SET_DR_MISALIGNMENT(DR, VAL)   ((DR)->aux = (void *) (size_t) (VAL))
 742
 743 static inline bool
 744 aligned_access_p (struct data_reference *data_ref_info)
 745 {
 746   return (DR_MISALIGNMENT (data_ref_info) == 0);
 747 }
 748
 749 static inline bool
 750 known_alignment_for_access_p (struct data_reference *data_ref_info)
 751 {
 752   return (DR_MISALIGNMENT (data_ref_info) != -1);
 753 }
 754
 755 /* vect_dump will be set to stderr or dump_file if exist.  */
 756 extern FILE *vect_dump;
 757 extern LOC vect_loop_location;
 758
 759 /*-----------------------------------------------------------------*/
 760 /* Function prototypes.                                            */
 761 /*-----------------------------------------------------------------*/
 762
 763 /* Simple loop peeling and versioning utilities for vectorizer's purposes -
 764    in tree-vect-loop-manip.c.  */
 765 extern void slpeel_make_loop_iterate_ntimes (struct loop *, tree);
 766 extern bool slpeel_can_duplicate_loop_p (const struct loop *, const_edge);
 767 extern void vect_loop_versioning (loop_vec_info, bool, tree *, gimple_seq *);
 768 extern void vect_do_peeling_for_loop_bound (loop_vec_info, tree *,
 769                                             tree, gimple_seq);
 770 extern void vect_do_peeling_for_alignment (loop_vec_info);
 771 extern LOC find_loop_location (struct loop *);
 772 extern bool vect_can_advance_ivs_p (loop_vec_info);
 773
 774 /* In tree-vect-stmts.c.  */
 775 extern tree get_vectype_for_scalar_type (tree);
 776 extern tree get_same_sized_vectype (tree, tree);
 777 extern bool vect_is_simple_use (tree, loop_vec_info, bb_vec_info, gimple *,
 778                                 tree *,  enum vect_def_type *);
 779 extern bool vect_is_simple_use_1 (tree, loop_vec_info, bb_vec_info, gimple *,
 780                                   tree *,  enum vect_def_type *, tree *);
 781 extern bool supportable_widening_operation (enum tree_code, gimple, tree, tree,
 782                                             tree *, tree *, enum tree_code *,
 783                                             enum tree_code *, int *,
 784                                             VEC (tree, heap) **);
 785 extern bool supportable_narrowing_operation (enum tree_code, tree, tree,
 786                                              enum tree_code *,
 787                                              int *, VEC (tree, heap) **);
 788 extern stmt_vec_info new_stmt_vec_info (gimple stmt, loop_vec_info,
 789                                         bb_vec_info);
 790 extern void free_stmt_vec_info (gimple stmt);
 791 extern tree vectorizable_function (gimple, tree, tree);
 792 extern void vect_model_simple_cost (stmt_vec_info, int, enum vect_def_type *,
 793                                     slp_tree);
 794 extern void vect_model_store_cost (stmt_vec_info, int, enum vect_def_type,
 795                                    slp_tree);
 796 extern void vect_model_load_cost (stmt_vec_info, int, slp_tree);
 797 extern void vect_finish_stmt_generation (gimple, gimple,
 798                                          gimple_stmt_iterator *);
 799 extern bool vect_mark_stmts_to_be_vectorized (loop_vec_info);
 800 extern int cost_for_stmt (gimple);
 801 extern tree vect_get_vec_def_for_operand (tree, gimple, tree *);
 802 extern tree vect_init_vector (gimple, tree, tree,
 803                               gimple_stmt_iterator *);
 804 extern tree vect_get_vec_def_for_stmt_copy (enum vect_def_type, tree);
 805 extern bool vect_transform_stmt (gimple, gimple_stmt_iterator *,
 806                                  bool *, slp_tree, slp_instance);
 807 extern void vect_remove_stores (gimple);
 808 extern bool vect_analyze_stmt (gimple, bool *, slp_tree);
 809 extern bool vectorizable_condition (gimple, gimple_stmt_iterator *, gimple *,
 810                                     tree, int);
 811
 812 /* In tree-vect-data-refs.c.  */
 813 extern bool vect_can_force_dr_alignment_p (const_tree, unsigned int);
 814 extern enum dr_alignment_support vect_supportable_dr_alignment
 815                                            (struct data_reference *);
 816 extern tree vect_get_smallest_scalar_type (gimple, HOST_WIDE_INT *,
 817                                            HOST_WIDE_INT *);
 818 extern bool vect_analyze_data_ref_dependences (loop_vec_info, bb_vec_info,
 819                                                int *);
 820 extern bool vect_enhance_data_refs_alignment (loop_vec_info);
 821 extern bool vect_analyze_data_refs_alignment (loop_vec_info, bb_vec_info);
 822 extern bool vect_verify_datarefs_alignment (loop_vec_info, bb_vec_info);
 823 extern bool vect_analyze_data_ref_accesses (loop_vec_info, bb_vec_info);
 824 extern bool vect_prune_runtime_alias_test_list (loop_vec_info);
 825 extern bool vect_analyze_data_refs (loop_vec_info, bb_vec_info, int *);
 826 extern tree vect_create_data_ref_ptr (gimple, struct loop *, tree, tree *,
 827                                       gimple *, bool, bool *);
 828 extern tree bump_vector_ptr (tree, gimple, gimple_stmt_iterator *, gimple, tree);
 829 extern tree vect_create_destination_var (tree, tree);
 830 extern bool vect_strided_store_supported (tree);
 831 extern bool vect_strided_load_supported (tree);
 832 extern bool vect_permute_store_chain (VEC(tree,heap) *,unsigned int, gimple,
 833                                     gimple_stmt_iterator *, VEC(tree,heap) **);
 834 extern tree vect_setup_realignment (gimple, gimple_stmt_iterator *, tree *,
 835                                     enum dr_alignment_support, tree,
 836                                     struct loop **);
 837 extern bool vect_permute_load_chain (VEC(tree,heap) *,unsigned int, gimple,
 838                                     gimple_stmt_iterator *, VEC(tree,heap) **);
 839 extern bool vect_transform_strided_load (gimple, VEC(tree,heap) *, int,
 840                                          gimple_stmt_iterator *);
 841 extern int vect_get_place_in_interleaving_chain (gimple, gimple);
 842 extern tree vect_get_new_vect_var (tree, enum vect_var_kind, const char *);
 843 extern tree vect_create_addr_base_for_vector_ref (gimple, gimple_seq *,
 844                                                   tree, struct loop *);
 845
 846 /* In tree-vect-loop.c.  */
 847 /* FORNOW: Used in tree-parloops.c.  */
 848 extern void destroy_loop_vec_info (loop_vec_info, bool);
 849 extern gimple vect_is_simple_reduction (loop_vec_info, gimple, bool, bool *);
 850 /* Drive for loop analysis stage.  */
 851 extern loop_vec_info vect_analyze_loop (struct loop *);
 852 /* Drive for loop transformation stage.  */
 853 extern void vect_transform_loop (loop_vec_info);
 854 extern loop_vec_info vect_analyze_loop_form (struct loop *);
 855 extern bool vectorizable_live_operation (gimple, gimple_stmt_iterator *,
 856                                          gimple *);
 857 extern bool vectorizable_reduction (gimple, gimple_stmt_iterator *, gimple *,
 858                                     slp_tree);
 859 extern bool vectorizable_induction (gimple, gimple_stmt_iterator *, gimple *);
 860 extern int vect_estimate_min_profitable_iters (loop_vec_info);
 861 extern tree get_initial_def_for_reduction (gimple, tree, tree *);
 862 extern int vect_min_worthwhile_factor (enum tree_code);
 863
 864
 865 /* In tree-vect-slp.c.  */
 866 extern void vect_free_slp_instance (slp_instance);
 867 extern bool vect_transform_slp_perm_load (gimple, VEC (tree, heap) *,
 868                                           gimple_stmt_iterator *, int,
 869                                           slp_instance, bool);
 870 extern bool vect_schedule_slp (loop_vec_info, bb_vec_info);
 871 extern void vect_update_slp_costs_according_to_vf (loop_vec_info);
 872 extern bool vect_analyze_slp (loop_vec_info, bb_vec_info);
 873 extern void vect_make_slp_decision (loop_vec_info);
 874 extern void vect_detect_hybrid_slp (loop_vec_info);
 875 extern void vect_get_slp_defs (slp_tree, VEC (tree,heap) **,
 876                                VEC (tree,heap) **, int);
 877 extern LOC find_bb_location (basic_block);
 878 extern bb_vec_info vect_slp_analyze_bb (basic_block);
 879 extern void vect_slp_transform_bb (basic_block);
 880
 881 /* In tree-vect-patterns.c.  */
 882 /* Pattern recognition functions.
 883    Additional pattern recognition functions can (and will) be added
 884    in the future.  */
 885 typedef gimple (* vect_recog_func_ptr) (gimple, tree *, tree *);
 886 #define NUM_PATTERNS 4
 887 void vect_pattern_recog (loop_vec_info);
 888
 889 /* In tree-vectorizer.c.  */
 890 unsigned vectorize_loops (void);
 891 /* Vectorization debug information */
 892 extern bool vect_print_dump_info (enum verbosity_levels);
 893
 894 #endif  /* GCC_TREE_VECTORIZER_H  */