gcc/tree-vectorizer.h

   1 /* Loop Vectorization
   2    Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   3    Contributed by Dorit Naishlos <dorit@il.ibm.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_TREE_VECTORIZER_H
  22 #define GCC_TREE_VECTORIZER_H
  23
  24 typedef source_location LOC;
  25 #define UNKNOWN_LOC UNKNOWN_LOCATION
  26 #define EXPR_LOC(e) EXPR_LOCATION(e)
  27 #define LOC_FILE(l) LOCATION_FILE (l)
  28 #define LOC_LINE(l) LOCATION_LINE (l)
  29
  30 /* Used for naming of new temporaries.  */
  31 enum vect_var_kind {
  32   vect_simple_var,
  33   vect_pointer_var,
  34   vect_scalar_var
  35 };
  36
  37 /* Defines type of operation.  */
  38 enum operation_type {
  39   unary_op = 1,
  40   binary_op,
  41   ternary_op
  42 };
  43
  44 /* Define type of available alignment support.  */
  45 enum dr_alignment_support {
  46   dr_unaligned_unsupported,
  47   dr_unaligned_supported,
  48   dr_explicit_realign,
  49   dr_explicit_realign_optimized,
  50   dr_aligned
  51 };
  52
  53 /* Define type of def-use cross-iteration cycle.  */
  54 enum vect_def_type {
  55   vect_constant_def = 1,
  56   vect_invariant_def,
  57   vect_loop_def,
  58   vect_induction_def,
  59   vect_reduction_def,
  60   vect_unknown_def_type
  61 };
  62
  63 /* Define verbosity levels.  */
  64 enum verbosity_levels {
  65   REPORT_NONE,
  66   REPORT_VECTORIZED_LOOPS,
  67   REPORT_UNVECTORIZED_LOOPS,
  68   REPORT_COST,
  69   REPORT_ALIGNMENT,
  70   REPORT_DR_DETAILS,
  71   REPORT_BAD_FORM_LOOPS,
  72   REPORT_OUTER_LOOPS,
  73   REPORT_SLP,
  74   REPORT_DETAILS,
  75   /* New verbosity levels should be added before this one.  */
  76   MAX_VERBOSITY_LEVEL
  77 };
  78
  79 /************************************************************************
  80   SLP
  81  ************************************************************************/
  82
  83 /* A computation tree of an SLP instance. Each node corresponds to a group of
  84    stmts to be packed in a SIMD stmt.  */
  85 typedef struct _slp_tree {
  86   /* Only binary and unary operations are supported. LEFT child corresponds to
  87      the first operand and RIGHT child to the second if the operation is
  88      binary.  */
  89   struct _slp_tree *left;
  90   struct _slp_tree *right;
  91   /* A group of scalar stmts to be vectorized together.  */
  92   VEC (tree, heap) *stmts;
  93   /* Vectorized stmt/s.  */
  94   VEC (tree, heap) *vec_stmts;
  95   /* Number of vector stmts that are created to replace the group of scalar
  96      stmts. It is calculated during the transformation phase as the number of
  97      scalar elements in one scalar iteration (GROUP_SIZE) multiplied by VF
  98      divided by vector size.  */
  99   unsigned int vec_stmts_size;
 100   /* Vectorization costs associated with SLP node.  */
 101   struct
 102   {
 103     int outside_of_loop;     /* Statements generated outside loop.  */
 104     int inside_of_loop;      /* Statements generated inside loop.  */
 105   } cost;
 106 } *slp_tree;
 107
 108
 109 /* SLP instance is a sequence of stmts in a loop that can be packed into
 110    SIMD stmts.  */
 111 typedef struct _slp_instance {
 112   /* The root of SLP tree.  */
 113   slp_tree root;
 114
 115   /* Size of groups of scalar stmts that will be replaced by SIMD stmt/s.  */
 116   unsigned int group_size;
 117
 118   /* The unrolling factor required to vectorized this SLP instance.  */
 119   unsigned int unrolling_factor;
 120
 121   /* Vectorization costs associated with SLP instance.  */
 122   struct
 123   {
 124     int outside_of_loop;     /* Statements generated outside loop.  */
 125     int inside_of_loop;      /* Statements generated inside loop.  */
 126   } cost;
 127 } *slp_instance;
 128
 129 DEF_VEC_P(slp_instance);
 130 DEF_VEC_ALLOC_P(slp_instance, heap);
 131
 132 /* Access Functions.  */
 133 #define SLP_INSTANCE_TREE(S)                     (S)->root
 134 #define SLP_INSTANCE_GROUP_SIZE(S)               (S)->group_size
 135 #define SLP_INSTANCE_UNROLLING_FACTOR(S)         (S)->unrolling_factor
 136 #define SLP_INSTANCE_OUTSIDE_OF_LOOP_COST(S)     (S)->cost.outside_of_loop
 137 #define SLP_INSTANCE_INSIDE_OF_LOOP_COST(S)      (S)->cost.inside_of_loop
 138
 139 #define SLP_TREE_LEFT(S)                         (S)->left
 140 #define SLP_TREE_RIGHT(S)                        (S)->right
 141 #define SLP_TREE_SCALAR_STMTS(S)                 (S)->stmts
 142 #define SLP_TREE_VEC_STMTS(S)                    (S)->vec_stmts
 143 #define SLP_TREE_NUMBER_OF_VEC_STMTS(S)          (S)->vec_stmts_size
 144 #define SLP_TREE_OUTSIDE_OF_LOOP_COST(S)         (S)->cost.outside_of_loop
 145 #define SLP_TREE_INSIDE_OF_LOOP_COST(S)          (S)->cost.inside_of_loop
 146
 147 /*-----------------------------------------------------------------*/
 148 /* Info on vectorized loops.                                       */
 149 /*-----------------------------------------------------------------*/
 150 typedef struct _loop_vec_info {
 151
 152   /* The loop to which this info struct refers to.  */
 153   struct loop *loop;
 154
 155   /* The loop basic blocks.  */
 156   basic_block *bbs;
 157
 158   /* Number of iterations.  */
 159   tree num_iters;
 160   tree num_iters_unchanged;
 161
 162   /* Minimum number of iterations below which vectorization is expected to
 163      not be profitable (as estimated by the cost model).
 164      -1 indicates that vectorization will not be profitable.
 165      FORNOW: This field is an int. Will be a tree in the future, to represent
 166              values unknown at compile time.  */
 167   int min_profitable_iters;
 168
 169   /* Is the loop vectorizable? */
 170   bool vectorizable;
 171
 172   /* Unrolling factor  */
 173   int vectorization_factor;
 174
 175   /* Unknown DRs according to which loop was peeled.  */
 176   struct data_reference *unaligned_dr;
 177
 178   /* peeling_for_alignment indicates whether peeling for alignment will take
 179      place, and what the peeling factor should be:
 180      peeling_for_alignment = X means:
 181         If X=0: Peeling for alignment will not be applied.
 182         If X>0: Peel first X iterations.
 183         If X=-1: Generate a runtime test to calculate the number of iterations
 184                  to be peeled, using the dataref recorded in the field
 185                  unaligned_dr.  */
 186   int peeling_for_alignment;
 187
 188   /* The mask used to check the alignment of pointers or arrays.  */
 189   int ptr_mask;
 190
 191   /* All data references in the loop.  */
 192   VEC (data_reference_p, heap) *datarefs;
 193
 194   /* All data dependences in the loop.  */
 195   VEC (ddr_p, heap) *ddrs;
 196
 197   /* Data Dependence Relations defining address ranges that are candidates
 198      for a run-time aliasing check.  */
 199   VEC (ddr_p, heap) *may_alias_ddrs;
 200
 201   /* Statements in the loop that have data references that are candidates for a
 202      runtime (loop versioning) misalignment check.  */
 203   VEC(tree,heap) *may_misalign_stmts;
 204
 205   /* The loop location in the source.  */
 206   LOC loop_line_number;
 207
 208   /* All interleaving chains of stores in the loop, represented by the first
 209      stmt in the chain.  */
 210   VEC(tree, heap) *strided_stores;
 211
 212   /* All SLP instances in the loop. This is a subset of the set of STRIDED_STORES
 213      of the loop.  */
 214   VEC(slp_instance, heap) *slp_instances;
 215
 216   /* The unrolling factor needed to SLP the loop. In case of that pure SLP is
 217      applied to the loop, i.e., no unrolling is needed, this is 1.  */
 218   unsigned slp_unrolling_factor;
 219 } *loop_vec_info;
 220
 221 /* Access Functions.  */
 222 #define LOOP_VINFO_LOOP(L)            (L)->loop
 223 #define LOOP_VINFO_BBS(L)             (L)->bbs
 224 #define LOOP_VINFO_NITERS(L)          (L)->num_iters
 225 /* Since LOOP_VINFO_NITERS can change after prologue peeling
 226    retain total unchanged scalar loop iterations for cost model.  */
 227 #define LOOP_VINFO_NITERS_UNCHANGED(L)          (L)->num_iters_unchanged
 228 #define LOOP_VINFO_COST_MODEL_MIN_ITERS(L)      (L)->min_profitable_iters
 229 #define LOOP_VINFO_VECTORIZABLE_P(L)  (L)->vectorizable
 230 #define LOOP_VINFO_VECT_FACTOR(L)     (L)->vectorization_factor
 231 #define LOOP_VINFO_PTR_MASK(L)        (L)->ptr_mask
 232 #define LOOP_VINFO_DATAREFS(L)        (L)->datarefs
 233 #define LOOP_VINFO_DDRS(L)            (L)->ddrs
 234 #define LOOP_VINFO_INT_NITERS(L)      (TREE_INT_CST_LOW ((L)->num_iters))
 235 #define LOOP_PEELING_FOR_ALIGNMENT(L) (L)->peeling_for_alignment
 236 #define LOOP_VINFO_UNALIGNED_DR(L)    (L)->unaligned_dr
 237 #define LOOP_VINFO_MAY_MISALIGN_STMTS(L) (L)->may_misalign_stmts
 238 #define LOOP_VINFO_LOC(L)             (L)->loop_line_number
 239 #define LOOP_VINFO_MAY_ALIAS_DDRS(L)  (L)->may_alias_ddrs
 240 #define LOOP_VINFO_STRIDED_STORES(L)  (L)->strided_stores
 241 #define LOOP_VINFO_SLP_INSTANCES(L)   (L)->slp_instances
 242 #define LOOP_VINFO_SLP_UNROLLING_FACTOR(L) (L)->slp_unrolling_factor
 243
 244 #define NITERS_KNOWN_P(n)                     \
 245 (host_integerp ((n),0)                        \
 246 && TREE_INT_CST_LOW ((n)) > 0)
 247
 248 #define LOOP_VINFO_NITERS_KNOWN_P(L)                     \
 249 NITERS_KNOWN_P((L)->num_iters)
 250
 251 static inline loop_vec_info
 252 loop_vec_info_for_loop (struct loop *loop)
 253 {
 254   return (loop_vec_info) loop->aux;
 255 }
 256
 257 static inline bool
 258 nested_in_vect_loop_p (struct loop *loop, tree stmt)
 259 {
 260   return (loop->inner
 261           && (loop->inner == (bb_for_stmt (stmt))->loop_father));
 262 }
 263
 264 /*-----------------------------------------------------------------*/
 265 /* Info on vectorized defs.                                        */
 266 /*-----------------------------------------------------------------*/
 267 enum stmt_vec_info_type {
 268   undef_vec_info_type = 0,
 269   load_vec_info_type,
 270   store_vec_info_type,
 271   op_vec_info_type,
 272   call_vec_info_type,
 273   assignment_vec_info_type,
 274   condition_vec_info_type,
 275   reduc_vec_info_type,
 276   induc_vec_info_type,
 277   type_promotion_vec_info_type,
 278   type_demotion_vec_info_type,
 279   type_conversion_vec_info_type,
 280   loop_exit_ctrl_vec_info_type
 281 };
 282
 283 /* Indicates whether/how a variable is used in the loop.  */
 284 enum vect_relevant {
 285   vect_unused_in_loop = 0,
 286   vect_used_in_outer_by_reduction,
 287   vect_used_in_outer,
 288
 289   /* defs that feed computations that end up (only) in a reduction. These
 290      defs may be used by non-reduction stmts, but eventually, any
 291      computations/values that are affected by these defs are used to compute
 292      a reduction (i.e. don't get stored to memory, for example). We use this
 293      to identify computations that we can change the order in which they are
 294      computed.  */
 295   vect_used_by_reduction,
 296
 297   vect_used_in_loop
 298 };
 299
 300 /* The type of vectorization that can be applied to the stmt: regular loop-based
 301    vectorization; pure SLP - the stmt is a part of SLP instances and does not
 302    have uses outside SLP instances; or hybrid SLP and loop-based - the stmt is
 303    a part of SLP instance and also must be loop-based vectorized, since it has
 304    uses outside SLP sequences.
 305
 306    In the loop context the meanings of pure and hybrid SLP are slightly
 307    different. By saying that pure SLP is applied to the loop, we mean that we
 308    exploit only intra-iteration parallelism in the loop; i.e., the loop can be
 309    vectorized without doing any conceptual unrolling, cause we don't pack
 310    together stmts from different iterations, only within a single iteration.
 311    Loop hybrid SLP means that we exploit both intra-iteration and
 312    inter-iteration parallelism (e.g., number of elements in the vector is 4
 313    and the slp-group-size is 2, in which case we don't have enough parallelism
 314    within an iteration, so we obtain the rest of the parallelism from subsequent
 315    iterations by unrolling the loop by 2).  */
 316 enum slp_vect_type {
 317   loop_vect = 0,
 318   pure_slp,
 319   hybrid
 320 };
 321
 322
 323 typedef struct data_reference *dr_p;
 324 DEF_VEC_P(dr_p);
 325 DEF_VEC_ALLOC_P(dr_p,heap);
 326
 327 typedef struct _stmt_vec_info {
 328
 329   enum stmt_vec_info_type type;
 330
 331   /* The stmt to which this info struct refers to.  */
 332   tree stmt;
 333
 334   /* The loop_vec_info with respect to which STMT is vectorized.  */
 335   loop_vec_info loop_vinfo;
 336
 337   /* Not all stmts in the loop need to be vectorized. e.g, the increment
 338      of the loop induction variable and computation of array indexes. relevant
 339      indicates whether the stmt needs to be vectorized.  */
 340   enum vect_relevant relevant;
 341
 342   /* Indicates whether this stmts is part of a computation whose result is
 343      used outside the loop.  */
 344   bool live;
 345
 346   /* The vector type to be used.  */
 347   tree vectype;
 348
 349   /* The vectorized version of the stmt.  */
 350   tree vectorized_stmt;
 351
 352
 353   /** The following is relevant only for stmts that contain a non-scalar
 354      data-ref (array/pointer/struct access). A GIMPLE stmt is expected to have
 355      at most one such data-ref.  **/
 356
 357   /* Information about the data-ref (access function, etc),
 358      relative to the inner-most containing loop.  */
 359   struct data_reference *data_ref_info;
 360
 361   /* Information about the data-ref relative to this loop
 362      nest (the loop that is being considered for vectorization).  */
 363   tree dr_base_address;
 364   tree dr_init;
 365   tree dr_offset;
 366   tree dr_step;
 367   tree dr_aligned_to;
 368
 369   /* Stmt is part of some pattern (computation idiom)  */
 370   bool in_pattern_p;
 371
 372   /* Used for various bookkeeping purposes, generally holding a pointer to
 373      some other stmt S that is in some way "related" to this stmt.
 374      Current use of this field is:
 375         If this stmt is part of a pattern (i.e. the field 'in_pattern_p' is
 376         true): S is the "pattern stmt" that represents (and replaces) the
 377         sequence of stmts that constitutes the pattern.  Similarly, the
 378         related_stmt of the "pattern stmt" points back to this stmt (which is
 379         the last stmt in the original sequence of stmts that constitutes the
 380         pattern).  */
 381   tree related_stmt;
 382
 383   /* List of datarefs that are known to have the same alignment as the dataref
 384      of this stmt.  */
 385   VEC(dr_p,heap) *same_align_refs;
 386
 387   /* Classify the def of this stmt.  */
 388   enum vect_def_type def_type;
 389
 390   /* Interleaving info.  */
 391   /* First data-ref in the interleaving group.  */
 392   tree first_dr;
 393   /* Pointer to the next data-ref in the group.  */
 394   tree next_dr;
 395   /* The size of the interleaving group.  */
 396   unsigned int size;
 397   /* For stores, number of stores from this group seen. We vectorize the last
 398      one.  */
 399   unsigned int store_count;
 400   /* For loads only, the gap from the previous load. For consecutive loads, GAP
 401      is 1.  */
 402   unsigned int gap;
 403   /* In case that two or more stmts share data-ref, this is the pointer to the
 404      previously detected stmt with the same dr.  */
 405   tree same_dr_stmt;
 406   /* For loads only, if there is a store with the same location, this field is
 407      TRUE.  */
 408   bool read_write_dep;
 409
 410   /* Vectorization costs associated with statement.  */
 411   struct
 412   {
 413     int outside_of_loop;     /* Statements generated outside loop.  */
 414     int inside_of_loop;      /* Statements generated inside loop.  */
 415   } cost;
 416
 417   /*  Whether the stmt is SLPed, loop-based vectorized, or both.  */
 418   enum slp_vect_type slp_type;
 419 } *stmt_vec_info;
 420
 421 /* Access Functions.  */
 422 #define STMT_VINFO_TYPE(S)                 (S)->type
 423 #define STMT_VINFO_STMT(S)                 (S)->stmt
 424 #define STMT_VINFO_LOOP_VINFO(S)           (S)->loop_vinfo
 425 #define STMT_VINFO_RELEVANT(S)             (S)->relevant
 426 #define STMT_VINFO_LIVE_P(S)               (S)->live
 427 #define STMT_VINFO_VECTYPE(S)              (S)->vectype
 428 #define STMT_VINFO_VEC_STMT(S)             (S)->vectorized_stmt
 429 #define STMT_VINFO_DATA_REF(S)             (S)->data_ref_info
 430
 431 #define STMT_VINFO_DR_BASE_ADDRESS(S)      (S)->dr_base_address
 432 #define STMT_VINFO_DR_INIT(S)              (S)->dr_init
 433 #define STMT_VINFO_DR_OFFSET(S)            (S)->dr_offset
 434 #define STMT_VINFO_DR_STEP(S)              (S)->dr_step
 435 #define STMT_VINFO_DR_ALIGNED_TO(S)        (S)->dr_aligned_to
 436
 437 #define STMT_VINFO_IN_PATTERN_P(S)         (S)->in_pattern_p
 438 #define STMT_VINFO_RELATED_STMT(S)         (S)->related_stmt
 439 #define STMT_VINFO_SAME_ALIGN_REFS(S)      (S)->same_align_refs
 440 #define STMT_VINFO_DEF_TYPE(S)             (S)->def_type
 441 #define STMT_VINFO_DR_GROUP_FIRST_DR(S)    (S)->first_dr
 442 #define STMT_VINFO_DR_GROUP_NEXT_DR(S)     (S)->next_dr
 443 #define STMT_VINFO_DR_GROUP_SIZE(S)        (S)->size
 444 #define STMT_VINFO_DR_GROUP_STORE_COUNT(S) (S)->store_count
 445 #define STMT_VINFO_DR_GROUP_GAP(S)         (S)->gap
 446 #define STMT_VINFO_DR_GROUP_SAME_DR_STMT(S)(S)->same_dr_stmt
 447 #define STMT_VINFO_DR_GROUP_READ_WRITE_DEPENDENCE(S)  (S)->read_write_dep
 448 #define STMT_VINFO_STRIDED_ACCESS(S)      ((S)->first_dr != NULL)
 449
 450 #define DR_GROUP_FIRST_DR(S)               (S)->first_dr
 451 #define DR_GROUP_NEXT_DR(S)                (S)->next_dr
 452 #define DR_GROUP_SIZE(S)                   (S)->size
 453 #define DR_GROUP_STORE_COUNT(S)            (S)->store_count
 454 #define DR_GROUP_GAP(S)                    (S)->gap
 455 #define DR_GROUP_SAME_DR_STMT(S)           (S)->same_dr_stmt
 456 #define DR_GROUP_READ_WRITE_DEPENDENCE(S)  (S)->read_write_dep
 457
 458 #define STMT_VINFO_RELEVANT_P(S)          ((S)->relevant != vect_unused_in_loop)
 459 #define STMT_VINFO_OUTSIDE_OF_LOOP_COST(S) (S)->cost.outside_of_loop
 460 #define STMT_VINFO_INSIDE_OF_LOOP_COST(S)  (S)->cost.inside_of_loop
 461
 462 #define HYBRID_SLP_STMT(S)                ((S)->slp_type == hybrid)
 463 #define PURE_SLP_STMT(S)                  ((S)->slp_type == pure_slp)
 464 #define STMT_SLP_TYPE(S)                   (S)->slp_type
 465
 466 /* These are some defines for the initial implementation of the vectorizer's
 467    cost model.  These will later be target specific hooks.  */
 468
 469 /* Cost of conditional taken branch.  */
 470 #ifndef TARG_COND_TAKEN_BRANCH_COST
 471 #define TARG_COND_TAKEN_BRANCH_COST        3
 472 #endif
 473
 474 /* Cost of conditional not taken branch.  */
 475 #ifndef TARG_COND_NOT_TAKEN_BRANCH_COST
 476 #define TARG_COND_NOT_TAKEN_BRANCH_COST        1
 477 #endif
 478
 479 /* Cost of any scalar operation, excluding load and store.  */
 480 #ifndef TARG_SCALAR_STMT_COST
 481 #define TARG_SCALAR_STMT_COST           1
 482 #endif
 483
 484 /* Cost of scalar load.  */
 485 #ifndef TARG_SCALAR_LOAD_COST
 486 #define TARG_SCALAR_LOAD_COST           1
 487 #endif
 488
 489 /* Cost of scalar store.  */
 490 #ifndef TARG_SCALAR_STORE_COST
 491 #define TARG_SCALAR_STORE_COST           1
 492 #endif
 493
 494 /* Cost of any vector operation, excluding load, store or vector to scalar
 495    operation.  */
 496 #ifndef TARG_VEC_STMT_COST
 497 #define TARG_VEC_STMT_COST           1
 498 #endif
 499
 500 /* Cost of vector to scalar operation.  */
 501 #ifndef TARG_VEC_TO_SCALAR_COST
 502 #define TARG_VEC_TO_SCALAR_COST      1
 503 #endif
 504
 505 /* Cost of scalar to vector operation.  */
 506 #ifndef TARG_SCALAR_TO_VEC_COST
 507 #define TARG_SCALAR_TO_VEC_COST      1
 508 #endif
 509
 510 /* Cost of aligned vector load.  */
 511 #ifndef TARG_VEC_LOAD_COST
 512 #define TARG_VEC_LOAD_COST           1
 513 #endif
 514
 515 /* Cost of misaligned vector load.  */
 516 #ifndef TARG_VEC_UNALIGNED_LOAD_COST
 517 #define TARG_VEC_UNALIGNED_LOAD_COST 2
 518 #endif
 519
 520 /* Cost of vector store.  */
 521 #ifndef TARG_VEC_STORE_COST
 522 #define TARG_VEC_STORE_COST          1
 523 #endif
 524
 525 static inline void set_stmt_info (stmt_ann_t ann, stmt_vec_info stmt_info);
 526 static inline stmt_vec_info vinfo_for_stmt (tree stmt);
 527
 528 static inline void
 529 set_stmt_info (stmt_ann_t ann, stmt_vec_info stmt_info)
 530 {
 531   if (ann)
 532     ann->common.aux = (char *) stmt_info;
 533 }
 534
 535 static inline stmt_vec_info
 536 vinfo_for_stmt (tree stmt)
 537 {
 538   stmt_ann_t ann = stmt_ann (stmt);
 539   return ann ? (stmt_vec_info) ann->common.aux : NULL;
 540 }
 541
 542 static inline bool
 543 is_pattern_stmt_p (stmt_vec_info stmt_info)
 544 {
 545   tree related_stmt;
 546   stmt_vec_info related_stmt_info;
 547
 548   related_stmt = STMT_VINFO_RELATED_STMT (stmt_info);
 549   if (related_stmt
 550       && (related_stmt_info = vinfo_for_stmt (related_stmt))
 551       && STMT_VINFO_IN_PATTERN_P (related_stmt_info))
 552     return true;
 553
 554   return false;
 555 }
 556
 557 static inline bool
 558 is_loop_header_bb_p (basic_block bb)
 559 {
 560   if (bb == (bb->loop_father)->header)
 561     return true;
 562   gcc_assert (EDGE_COUNT (bb->preds) == 1);
 563   return false;
 564 }
 565
 566 static inline void
 567 stmt_vinfo_set_inside_of_loop_cost (stmt_vec_info stmt_info, slp_tree slp_node,
 568                                     int cost)
 569 {
 570   if (slp_node)
 571     SLP_TREE_INSIDE_OF_LOOP_COST (slp_node) = cost;
 572   else
 573     STMT_VINFO_INSIDE_OF_LOOP_COST (stmt_info) = cost;
 574 }
 575
 576 static inline void
 577 stmt_vinfo_set_outside_of_loop_cost (stmt_vec_info stmt_info, slp_tree slp_node,
 578                                      int cost)
 579 {
 580   if (slp_node)
 581     SLP_TREE_OUTSIDE_OF_LOOP_COST (slp_node) = cost;
 582   else
 583     STMT_VINFO_OUTSIDE_OF_LOOP_COST (stmt_info) = cost;
 584 }
 585
 586
 587 /*-----------------------------------------------------------------*/
 588 /* Info on data references alignment.                              */
 589 /*-----------------------------------------------------------------*/
 590
 591 /* Reflects actual alignment of first access in the vectorized loop,
 592    taking into account peeling/versioning if applied.  */
 593 #define DR_MISALIGNMENT(DR)   ((int) (size_t) (DR)->aux)
 594 #define SET_DR_MISALIGNMENT(DR, VAL)   ((DR)->aux = (void *) (size_t) (VAL))
 595
 596 static inline bool
 597 aligned_access_p (struct data_reference *data_ref_info)
 598 {
 599   return (DR_MISALIGNMENT (data_ref_info) == 0);
 600 }
 601
 602 static inline bool
 603 known_alignment_for_access_p (struct data_reference *data_ref_info)
 604 {
 605   return (DR_MISALIGNMENT (data_ref_info) != -1);
 606 }
 607
 608 /* vect_dump will be set to stderr or dump_file if exist.  */
 609 extern FILE *vect_dump;
 610 extern enum verbosity_levels vect_verbosity_level;
 611
 612 /* Bitmap of virtual variables to be renamed.  */
 613 extern bitmap vect_memsyms_to_rename;
 614
 615 /*-----------------------------------------------------------------*/
 616 /* Function prototypes.                                            */
 617 /*-----------------------------------------------------------------*/
 618
 619 /*************************************************************************
 620   Simple Loop Peeling Utilities - in tree-vectorizer.c
 621  *************************************************************************/
 622 /* Entry point for peeling of simple loops.
 623    Peel the first/last iterations of a loop.
 624    It can be used outside of the vectorizer for loops that are simple enough
 625    (see function documentation).  In the vectorizer it is used to peel the
 626    last few iterations when the loop bound is unknown or does not evenly
 627    divide by the vectorization factor, and to peel the first few iterations
 628    to force the alignment of data references in the loop.  */
 629 extern struct loop *slpeel_tree_peel_loop_to_edge
 630   (struct loop *, edge, tree, tree, bool, unsigned int, bool);
 631 extern void set_prologue_iterations (basic_block, tree,
 632                                      struct loop *, unsigned int);
 633 struct loop *tree_duplicate_loop_on_edge (struct loop *, edge);
 634 extern void slpeel_make_loop_iterate_ntimes (struct loop *, tree);
 635 extern bool slpeel_can_duplicate_loop_p (const struct loop *, const_edge);
 636 #ifdef ENABLE_CHECKING
 637 extern void slpeel_verify_cfg_after_peeling (struct loop *, struct loop *);
 638 #endif
 639
 640
 641 /*************************************************************************
 642   General Vectorization Utilities
 643  *************************************************************************/
 644 /** In tree-vectorizer.c **/
 645 extern tree get_vectype_for_scalar_type (tree);
 646 extern bool vect_is_simple_use (tree, loop_vec_info, tree *, tree *,
 647                                 enum vect_def_type *);
 648 extern bool vect_is_simple_iv_evolution (unsigned, tree, tree *, tree *);
 649 extern tree vect_is_simple_reduction (loop_vec_info, tree);
 650 extern bool vect_can_force_dr_alignment_p (const_tree, unsigned int);
 651 extern enum dr_alignment_support vect_supportable_dr_alignment
 652   (struct data_reference *);
 653 extern bool reduction_code_for_scalar_code (enum tree_code, enum tree_code *);
 654 extern bool supportable_widening_operation (enum tree_code, tree, tree,
 655   tree *, tree *, enum tree_code *, enum tree_code *);
 656 extern bool supportable_narrowing_operation (enum tree_code, const_tree,
 657                                              const_tree, enum tree_code *);
 658
 659 /* Creation and deletion of loop and stmt info structs.  */
 660 extern loop_vec_info new_loop_vec_info (struct loop *loop);
 661 extern void destroy_loop_vec_info (loop_vec_info, bool);
 662 extern stmt_vec_info new_stmt_vec_info (tree stmt, loop_vec_info);
 663 extern void free_stmt_vec_info (tree stmt);
 664
 665
 666 /** In tree-vect-analyze.c  **/
 667 /* Driver for analysis stage.  */
 668 extern loop_vec_info vect_analyze_loop (struct loop *);
 669 extern void vect_free_slp_tree (slp_tree);
 670 extern loop_vec_info vect_analyze_loop_form (struct loop *);
 671
 672 /** In tree-vect-patterns.c  **/
 673 /* Pattern recognition functions.
 674    Additional pattern recognition functions can (and will) be added
 675    in the future.  */
 676 typedef tree (* vect_recog_func_ptr) (tree, tree *, tree *);
 677 #define NUM_PATTERNS 4
 678 void vect_pattern_recog (loop_vec_info);
 679
 680
 681 /** In tree-vect-transform.c  **/
 682 extern bool vectorizable_load (tree, block_stmt_iterator *, tree *, slp_tree);
 683 extern bool vectorizable_store (tree, block_stmt_iterator *, tree *, slp_tree);
 684 extern bool vectorizable_operation (tree, block_stmt_iterator *, tree *,
 685                                     slp_tree);
 686 extern bool vectorizable_type_promotion (tree, block_stmt_iterator *, tree *);
 687 extern bool vectorizable_type_demotion (tree, block_stmt_iterator *, tree *);
 688 extern bool vectorizable_conversion (tree, block_stmt_iterator *,
 689                                      tree *, slp_tree);
 690 extern bool vectorizable_assignment (tree, block_stmt_iterator *, tree *,
 691                                      slp_tree);
 692 extern tree vectorizable_function (tree, tree, tree);
 693 extern bool vectorizable_call (tree, block_stmt_iterator *, tree *);
 694 extern bool vectorizable_condition (tree, block_stmt_iterator *, tree *);
 695 extern bool vectorizable_live_operation (tree, block_stmt_iterator *, tree *);
 696 extern bool vectorizable_reduction (tree, block_stmt_iterator *, tree *);
 697 extern bool vectorizable_induction (tree, block_stmt_iterator *, tree *);
 698 extern int  vect_estimate_min_profitable_iters (loop_vec_info);
 699 extern void vect_model_simple_cost (stmt_vec_info, int, enum vect_def_type *,
 700                                     slp_tree);
 701 extern void vect_model_store_cost (stmt_vec_info, int, enum vect_def_type,
 702                                    slp_tree);
 703 extern void vect_model_load_cost (stmt_vec_info, int, slp_tree);
 704 /* Driver for transformation stage.  */
 705 extern void vect_transform_loop (loop_vec_info);
 706
 707 /*************************************************************************
 708   Vectorization Debug Information - in tree-vectorizer.c
 709  *************************************************************************/
 710 extern bool vect_print_dump_info (enum verbosity_levels);
 711 extern void vect_set_verbosity_level (const char *);
 712 extern LOC find_loop_location (struct loop *);
 713
 714 #endif  /* GCC_TREE_VECTORIZER_H  */