1 /* 2 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "compiler/compileLog.hpp" 26 #include "libadt/vectset.hpp" 27 #include "memory/allocation.inline.hpp" 28 #include "memory/resourceArea.hpp" 29 #include "opto/addnode.hpp" 30 #include "opto/callnode.hpp" 31 #include "opto/castnode.hpp" 32 #include "opto/convertnode.hpp" 33 #include "opto/divnode.hpp" 34 #include "opto/matcher.hpp" 35 #include "opto/memnode.hpp" 36 #include "opto/mulnode.hpp" 37 #include "opto/opcodes.hpp" 38 #include "opto/opaquenode.hpp" 39 #include "opto/superword.hpp" 40 #include "opto/vectornode.hpp" 41 #include "opto/movenode.hpp" 42 43 // 44 // S U P E R W O R D T R A N S F O R M 45 //============================================================================= 46 47 //------------------------------SuperWord--------------------------- 48 SuperWord::SuperWord(PhaseIdealLoop* phase) : 49 _phase(phase), 50 _arena(phase->C->comp_arena()), 51 _igvn(phase->_igvn), 52 _packset(arena(), 8, 0, NULL), // packs for the current block 53 _bb_idx(arena(), (int)(1.10 * phase->C->unique()), 0, 0), // node idx to index in bb 54 _block(arena(), 8, 0, NULL), // nodes in current block 55 _post_block(arena(), 8, 0, NULL), // nodes common to current block which are marked as post loop vectorizable 56 _data_entry(arena(), 8, 0, NULL), // nodes with all inputs from outside 57 _mem_slice_head(arena(), 8, 0, NULL), // memory slice heads 58 _mem_slice_tail(arena(), 8, 0, NULL), // memory slice tails 59 _node_info(arena(), 8, 0, SWNodeInfo::initial), // info needed per node 60 _clone_map(phase->C->clone_map()), // map of nodes created in cloning 61 _cmovev_kit(_arena, this), // map to facilitate CMoveV creation 62 _align_to_ref(NULL), // memory reference to align vectors to 63 _disjoint_ptrs(arena(), 8, 0, OrderedPair::initial), // runtime disambiguated pointer pairs 64 _dg(_arena), // dependence graph 65 _visited(arena()), // visited node set 66 _post_visited(arena()), // post visited node set 67 _n_idx_list(arena(), 8), // scratch list of (node,index) pairs 68 _nlist(arena(), 8, 0, NULL), // scratch list of nodes 69 _stk(arena(), 8, 0, NULL), // scratch stack of nodes 70 _lpt(NULL), // loop tree node 71 _lp(NULL), // LoopNode 72 _bb(NULL), // basic block 73 _iv(NULL), // induction var 74 _race_possible(false), // cases where SDMU is true 75 _early_return(true), // analysis evaluations routine 76 _do_vector_loop(phase->C->do_vector_loop()), // whether to do vectorization/simd style 77 _do_reserve_copy(DoReserveCopyInSuperWord), 78 _num_work_vecs(0), // amount of vector work we have 79 _num_reductions(0), // amount of reduction work we have 80 _ii_first(-1), // first loop generation index - only if do_vector_loop() 81 _ii_last(-1), // last loop generation index - only if do_vector_loop() 82 _ii_order(arena(), 8, 0, 0) 83 { 84 #ifndef PRODUCT 85 _vector_loop_debug = 0; 86 if (_phase->C->method() != NULL) { 87 _vector_loop_debug = phase->C->directive()->VectorizeDebugOption; 88 } 89 90 #endif 91 } 92 93 //------------------------------transform_loop--------------------------- 94 void SuperWord::transform_loop(IdealLoopTree* lpt, bool do_optimization) { 95 assert(UseSuperWord, "should be"); 96 // Do vectors exist on this architecture? 97 if (Matcher::vector_width_in_bytes(T_BYTE) < 2) return; 98 99 assert(lpt->_head->is_CountedLoop(), "must be"); 100 CountedLoopNode *cl = lpt->_head->as_CountedLoop(); 101 102 if (!cl->is_valid_counted_loop()) return; // skip malformed counted loop 103 104 bool post_loop_allowed = (PostLoopMultiversioning && Matcher::has_predicated_vectors() && cl->is_post_loop()); 105 if (post_loop_allowed) { 106 if (cl->is_reduction_loop()) return; // no predication mapping 107 Node *limit = cl->limit(); 108 if (limit->is_Con()) return; // non constant limits only 109 // Now check the limit for expressions we do not handle 110 if (limit->is_Add()) { 111 Node *in2 = limit->in(2); 112 if (in2->is_Con()) { 113 int val = in2->get_int(); 114 // should not try to program these cases 115 if (val < 0) return; 116 } 117 } 118 } 119 120 // skip any loop that has not been assigned max unroll by analysis 121 if (do_optimization) { 122 if (SuperWordLoopUnrollAnalysis && cl->slp_max_unroll() == 0) return; 123 } 124 125 // Check for no control flow in body (other than exit) 126 Node *cl_exit = cl->loopexit(); 127 if (cl->is_main_loop() && (cl_exit->in(0) != lpt->_head)) { 128 #ifndef PRODUCT 129 if (TraceSuperWord) { 130 tty->print_cr("SuperWord::transform_loop: loop too complicated, cl_exit->in(0) != lpt->_head"); 131 tty->print("cl_exit %d", cl_exit->_idx); cl_exit->dump(); 132 tty->print("cl_exit->in(0) %d", cl_exit->in(0)->_idx); cl_exit->in(0)->dump(); 133 tty->print("lpt->_head %d", lpt->_head->_idx); lpt->_head->dump(); 134 lpt->dump_head(); 135 } 136 #endif 137 return; 138 } 139 140 // Make sure the are no extra control users of the loop backedge 141 if (cl->back_control()->outcnt() != 1) { 142 return; 143 } 144 145 // Skip any loops already optimized by slp 146 if (cl->is_vectorized_loop()) return; 147 148 if (cl->is_unroll_only()) return; 149 150 if (cl->is_main_loop()) { 151 // Check for pre-loop ending with CountedLoopEnd(Bool(Cmp(x,Opaque1(limit)))) 152 CountedLoopEndNode* pre_end = get_pre_loop_end(cl); 153 if (pre_end == NULL) return; 154 Node *pre_opaq1 = pre_end->limit(); 155 if (pre_opaq1->Opcode() != Op_Opaque1) return; 156 } 157 158 init(); // initialize data structures 159 160 set_lpt(lpt); 161 set_lp(cl); 162 163 // For now, define one block which is the entire loop body 164 set_bb(cl); 165 166 if (do_optimization) { 167 assert(_packset.length() == 0, "packset must be empty"); 168 SLP_extract(); 169 if (PostLoopMultiversioning && Matcher::has_predicated_vectors()) { 170 if (cl->is_vectorized_loop() && cl->is_main_loop() && !cl->is_reduction_loop()) { 171 IdealLoopTree *lpt_next = lpt->_next; 172 CountedLoopNode *cl_next = lpt_next->_head->as_CountedLoop(); 173 _phase->has_range_checks(lpt_next); 174 if (cl_next->is_post_loop() && !cl_next->range_checks_present()) { 175 if (!cl_next->is_vectorized_loop()) { 176 int slp_max_unroll_factor = cl->slp_max_unroll(); 177 cl_next->set_slp_max_unroll(slp_max_unroll_factor); 178 } 179 } 180 } 181 } 182 } 183 } 184 185 //------------------------------early unrolling analysis------------------------------ 186 void SuperWord::unrolling_analysis(int &local_loop_unroll_factor) { 187 bool is_slp = true; 188 ResourceMark rm; 189 size_t ignored_size = lpt()->_body.size(); 190 int *ignored_loop_nodes = NEW_RESOURCE_ARRAY(int, ignored_size); 191 Node_Stack nstack((int)ignored_size); 192 CountedLoopNode *cl = lpt()->_head->as_CountedLoop(); 193 Node *cl_exit = cl->loopexit_or_null(); 194 int rpo_idx = _post_block.length(); 195 196 assert(rpo_idx == 0, "post loop block is empty"); 197 198 // First clear the entries 199 for (uint i = 0; i < lpt()->_body.size(); i++) { 200 ignored_loop_nodes[i] = -1; 201 } 202 203 int max_vector = Matcher::max_vector_size(T_BYTE); 204 bool post_loop_allowed = (PostLoopMultiversioning && Matcher::has_predicated_vectors() && cl->is_post_loop()); 205 206 // Process the loop, some/all of the stack entries will not be in order, ergo 207 // need to preprocess the ignored initial state before we process the loop 208 for (uint i = 0; i < lpt()->_body.size(); i++) { 209 Node* n = lpt()->_body.at(i); 210 if (n == cl->incr() || 211 n->is_reduction() || 212 n->is_AddP() || 213 n->is_Cmp() || 214 n->is_IfTrue() || 215 n->is_CountedLoop() || 216 (n == cl_exit)) { 217 ignored_loop_nodes[i] = n->_idx; 218 continue; 219 } 220 221 if (n->is_If()) { 222 IfNode *iff = n->as_If(); 223 if (iff->_fcnt != COUNT_UNKNOWN && iff->_prob != PROB_UNKNOWN) { 224 if (lpt()->is_loop_exit(iff)) { 225 ignored_loop_nodes[i] = n->_idx; 226 continue; 227 } 228 } 229 } 230 231 if (n->is_Phi() && (n->bottom_type() == Type::MEMORY)) { 232 Node* n_tail = n->in(LoopNode::LoopBackControl); 233 if (n_tail != n->in(LoopNode::EntryControl)) { 234 if (!n_tail->is_Mem()) { 235 is_slp = false; 236 break; 237 } 238 } 239 } 240 241 // This must happen after check of phi/if 242 if (n->is_Phi() || n->is_If()) { 243 ignored_loop_nodes[i] = n->_idx; 244 continue; 245 } 246 247 if (n->is_LoadStore() || n->is_MergeMem() || 248 (n->is_Proj() && !n->as_Proj()->is_CFG())) { 249 is_slp = false; 250 break; 251 } 252 253 // Ignore nodes with non-primitive type. 254 BasicType bt; 255 if (n->is_Mem()) { 256 bt = n->as_Mem()->memory_type(); 257 } else { 258 bt = n->bottom_type()->basic_type(); 259 } 260 if (is_java_primitive(bt) == false) { 261 ignored_loop_nodes[i] = n->_idx; 262 continue; 263 } 264 265 if (n->is_Mem()) { 266 MemNode* current = n->as_Mem(); 267 Node* adr = n->in(MemNode::Address); 268 Node* n_ctrl = _phase->get_ctrl(adr); 269 270 // save a queue of post process nodes 271 if (n_ctrl != NULL && lpt()->is_member(_phase->get_loop(n_ctrl))) { 272 // Process the memory expression 273 int stack_idx = 0; 274 bool have_side_effects = true; 275 if (adr->is_AddP() == false) { 276 nstack.push(adr, stack_idx++); 277 } else { 278 // Mark the components of the memory operation in nstack 279 SWPointer p1(current, this, &nstack, true); 280 have_side_effects = p1.node_stack()->is_nonempty(); 281 } 282 283 // Process the pointer stack 284 while (have_side_effects) { 285 Node* pointer_node = nstack.node(); 286 for (uint j = 0; j < lpt()->_body.size(); j++) { 287 Node* cur_node = lpt()->_body.at(j); 288 if (cur_node == pointer_node) { 289 ignored_loop_nodes[j] = cur_node->_idx; 290 break; 291 } 292 } 293 nstack.pop(); 294 have_side_effects = nstack.is_nonempty(); 295 } 296 } 297 } 298 } 299 300 if (is_slp) { 301 // Now we try to find the maximum supported consistent vector which the machine 302 // description can use 303 bool small_basic_type = false; 304 bool flag_small_bt = false; 305 for (uint i = 0; i < lpt()->_body.size(); i++) { 306 if (ignored_loop_nodes[i] != -1) continue; 307 308 BasicType bt; 309 Node* n = lpt()->_body.at(i); 310 if (n->is_Mem()) { 311 bt = n->as_Mem()->memory_type(); 312 } else { 313 bt = n->bottom_type()->basic_type(); 314 } 315 316 if (post_loop_allowed) { 317 if (!small_basic_type) { 318 switch (bt) { 319 case T_CHAR: 320 case T_BYTE: 321 case T_SHORT: 322 small_basic_type = true; 323 break; 324 325 case T_LONG: 326 // TODO: Remove when support completed for mask context with LONG. 327 // Support needs to be augmented for logical qword operations, currently we map to dword 328 // buckets for vectors on logicals as these were legacy. 329 small_basic_type = true; 330 break; 331 332 default: 333 break; 334 } 335 } 336 } 337 338 if (is_java_primitive(bt) == false) continue; 339 340 int cur_max_vector = Matcher::max_vector_size(bt); 341 342 // If a max vector exists which is not larger than _local_loop_unroll_factor 343 // stop looking, we already have the max vector to map to. 344 if (cur_max_vector < local_loop_unroll_factor) { 345 is_slp = false; 346 if (TraceSuperWordLoopUnrollAnalysis) { 347 tty->print_cr("slp analysis fails: unroll limit greater than max vector\n"); 348 } 349 break; 350 } 351 352 // Map the maximal common vector 353 if (VectorNode::implemented(n->Opcode(), cur_max_vector, bt)) { 354 if (cur_max_vector < max_vector && !flag_small_bt) { 355 max_vector = cur_max_vector; 356 } else if (cur_max_vector > max_vector && UseSubwordForMaxVector) { 357 // Analyse subword in the loop to set maximum vector size to take advantage of full vector width for subword types. 358 // Here we analyze if narrowing is likely to happen and if it is we set vector size more aggressively. 359 // We check for possibility of narrowing by looking through chain operations using subword types. 360 if (is_subword_type(bt)) { 361 uint start, end; 362 VectorNode::vector_operands(n, &start, &end); 363 364 for (uint j = start; j < end; j++) { 365 Node* in = n->in(j); 366 // Don't propagate through a memory 367 if (!in->is_Mem() && in_bb(in) && in->bottom_type()->basic_type() == T_INT) { 368 bool same_type = true; 369 for (DUIterator_Fast kmax, k = in->fast_outs(kmax); k < kmax; k++) { 370 Node *use = in->fast_out(k); 371 if (!in_bb(use) && use->bottom_type()->basic_type() != bt) { 372 same_type = false; 373 break; 374 } 375 } 376 if (same_type) { 377 max_vector = cur_max_vector; 378 flag_small_bt = true; 379 cl->mark_subword_loop(); 380 } 381 } 382 } 383 } 384 } 385 // We only process post loops on predicated targets where we want to 386 // mask map the loop to a single iteration 387 if (post_loop_allowed) { 388 _post_block.at_put_grow(rpo_idx++, n); 389 } 390 } 391 } 392 if (is_slp) { 393 local_loop_unroll_factor = max_vector; 394 cl->mark_passed_slp(); 395 } 396 cl->mark_was_slp(); 397 if (cl->is_main_loop()) { 398 cl->set_slp_max_unroll(local_loop_unroll_factor); 399 } else if (post_loop_allowed) { 400 if (!small_basic_type) { 401 // avoid replication context for small basic types in programmable masked loops 402 cl->set_slp_max_unroll(local_loop_unroll_factor); 403 } 404 } 405 } 406 } 407 408 //------------------------------SLP_extract--------------------------- 409 // Extract the superword level parallelism 410 // 411 // 1) A reverse post-order of nodes in the block is constructed. By scanning 412 // this list from first to last, all definitions are visited before their uses. 413 // 414 // 2) A point-to-point dependence graph is constructed between memory references. 415 // This simplies the upcoming "independence" checker. 416 // 417 // 3) The maximum depth in the node graph from the beginning of the block 418 // to each node is computed. This is used to prune the graph search 419 // in the independence checker. 420 // 421 // 4) For integer types, the necessary bit width is propagated backwards 422 // from stores to allow packed operations on byte, char, and short 423 // integers. This reverses the promotion to type "int" that javac 424 // did for operations like: char c1,c2,c3; c1 = c2 + c3. 425 // 426 // 5) One of the memory references is picked to be an aligned vector reference. 427 // The pre-loop trip count is adjusted to align this reference in the 428 // unrolled body. 429 // 430 // 6) The initial set of pack pairs is seeded with memory references. 431 // 432 // 7) The set of pack pairs is extended by following use->def and def->use links. 433 // 434 // 8) The pairs are combined into vector sized packs. 435 // 436 // 9) Reorder the memory slices to co-locate members of the memory packs. 437 // 438 // 10) Generate ideal vector nodes for the final set of packs and where necessary, 439 // inserting scalar promotion, vector creation from multiple scalars, and 440 // extraction of scalar values from vectors. 441 // 442 void SuperWord::SLP_extract() { 443 444 #ifndef PRODUCT 445 if (_do_vector_loop && TraceSuperWord) { 446 tty->print("SuperWord::SLP_extract\n"); 447 tty->print("input loop\n"); 448 _lpt->dump_head(); 449 _lpt->dump(); 450 for (uint i = 0; i < _lpt->_body.size(); i++) { 451 _lpt->_body.at(i)->dump(); 452 } 453 } 454 #endif 455 // Ready the block 456 if (!construct_bb()) { 457 return; // Exit if no interesting nodes or complex graph. 458 } 459 460 // build _dg, _disjoint_ptrs 461 dependence_graph(); 462 463 // compute function depth(Node*) 464 compute_max_depth(); 465 466 CountedLoopNode *cl = lpt()->_head->as_CountedLoop(); 467 bool post_loop_allowed = (PostLoopMultiversioning && Matcher::has_predicated_vectors() && cl->is_post_loop()); 468 if (cl->is_main_loop()) { 469 if (_do_vector_loop) { 470 if (mark_generations() != -1) { 471 hoist_loads_in_graph(); // this only rebuild the graph; all basic structs need rebuild explicitly 472 473 if (!construct_bb()) { 474 return; // Exit if no interesting nodes or complex graph. 475 } 476 dependence_graph(); 477 compute_max_depth(); 478 } 479 480 #ifndef PRODUCT 481 if (TraceSuperWord) { 482 tty->print_cr("\nSuperWord::_do_vector_loop: graph after hoist_loads_in_graph"); 483 _lpt->dump_head(); 484 for (int j = 0; j < _block.length(); j++) { 485 Node* n = _block.at(j); 486 int d = depth(n); 487 for (int i = 0; i < d; i++) tty->print("%s", " "); 488 tty->print("%d :", d); 489 n->dump(); 490 } 491 } 492 #endif 493 } 494 495 compute_vector_element_type(); 496 497 // Attempt vectorization 498 499 find_adjacent_refs(); 500 501 extend_packlist(); 502 503 if (_do_vector_loop) { 504 if (_packset.length() == 0) { 505 if (TraceSuperWord) { 506 tty->print_cr("\nSuperWord::_do_vector_loop DFA could not build packset, now trying to build anyway"); 507 } 508 pack_parallel(); 509 } 510 } 511 512 combine_packs(); 513 514 construct_my_pack_map(); 515 if (UseVectorCmov) { 516 merge_packs_to_cmovd(); 517 } 518 519 filter_packs(); 520 521 schedule(); 522 } else if (post_loop_allowed) { 523 int saved_mapped_unroll_factor = cl->slp_max_unroll(); 524 if (saved_mapped_unroll_factor) { 525 int vector_mapped_unroll_factor = saved_mapped_unroll_factor; 526 527 // now reset the slp_unroll_factor so that we can check the analysis mapped 528 // what the vector loop was mapped to 529 cl->set_slp_max_unroll(0); 530 531 // do the analysis on the post loop 532 unrolling_analysis(vector_mapped_unroll_factor); 533 534 // if our analyzed loop is a canonical fit, start processing it 535 if (vector_mapped_unroll_factor == saved_mapped_unroll_factor) { 536 // now add the vector nodes to packsets 537 for (int i = 0; i < _post_block.length(); i++) { 538 Node* n = _post_block.at(i); 539 Node_List* singleton = new Node_List(); 540 singleton->push(n); 541 _packset.append(singleton); 542 set_my_pack(n, singleton); 543 } 544 545 // map base types for vector usage 546 compute_vector_element_type(); 547 } else { 548 return; 549 } 550 } else { 551 // for some reason we could not map the slp analysis state of the vectorized loop 552 return; 553 } 554 } 555 556 output(); 557 } 558 559 //------------------------------find_adjacent_refs--------------------------- 560 // Find the adjacent memory references and create pack pairs for them. 561 // This is the initial set of packs that will then be extended by 562 // following use->def and def->use links. The align positions are 563 // assigned relative to the reference "align_to_ref" 564 void SuperWord::find_adjacent_refs() { 565 // Get list of memory operations 566 Node_List memops; 567 for (int i = 0; i < _block.length(); i++) { 568 Node* n = _block.at(i); 569 if (n->is_Mem() && !n->is_LoadStore() && in_bb(n) && 570 is_java_primitive(n->as_Mem()->memory_type())) { 571 int align = memory_alignment(n->as_Mem(), 0); 572 if (align != bottom_align) { 573 memops.push(n); 574 } 575 } 576 } 577 578 Node_List align_to_refs; 579 int best_iv_adjustment = 0; 580 MemNode* best_align_to_mem_ref = NULL; 581 582 while (memops.size() != 0) { 583 // Find a memory reference to align to. 584 MemNode* mem_ref = find_align_to_ref(memops); 585 if (mem_ref == NULL) break; 586 align_to_refs.push(mem_ref); 587 int iv_adjustment = get_iv_adjustment(mem_ref); 588 589 if (best_align_to_mem_ref == NULL) { 590 // Set memory reference which is the best from all memory operations 591 // to be used for alignment. The pre-loop trip count is modified to align 592 // this reference to a vector-aligned address. 593 best_align_to_mem_ref = mem_ref; 594 best_iv_adjustment = iv_adjustment; 595 NOT_PRODUCT(find_adjacent_refs_trace_1(best_align_to_mem_ref, best_iv_adjustment);) 596 } 597 598 SWPointer align_to_ref_p(mem_ref, this, NULL, false); 599 // Set alignment relative to "align_to_ref" for all related memory operations. 600 for (int i = memops.size() - 1; i >= 0; i--) { 601 MemNode* s = memops.at(i)->as_Mem(); 602 if (isomorphic(s, mem_ref) && 603 (!_do_vector_loop || same_origin_idx(s, mem_ref))) { 604 SWPointer p2(s, this, NULL, false); 605 if (p2.comparable(align_to_ref_p)) { 606 int align = memory_alignment(s, iv_adjustment); 607 set_alignment(s, align); 608 } 609 } 610 } 611 612 // Create initial pack pairs of memory operations for which 613 // alignment is set and vectors will be aligned. 614 bool create_pack = true; 615 if (memory_alignment(mem_ref, best_iv_adjustment) == 0 || _do_vector_loop) { 616 if (!Matcher::misaligned_vectors_ok() || AlignVector) { 617 int vw = vector_width(mem_ref); 618 int vw_best = vector_width(best_align_to_mem_ref); 619 if (vw > vw_best) { 620 // Do not vectorize a memory access with more elements per vector 621 // if unaligned memory access is not allowed because number of 622 // iterations in pre-loop will be not enough to align it. 623 create_pack = false; 624 } else { 625 SWPointer p2(best_align_to_mem_ref, this, NULL, false); 626 if (align_to_ref_p.invar() != p2.invar()) { 627 // Do not vectorize memory accesses with different invariants 628 // if unaligned memory accesses are not allowed. 629 create_pack = false; 630 } 631 } 632 } 633 } else { 634 if (same_velt_type(mem_ref, best_align_to_mem_ref)) { 635 // Can't allow vectorization of unaligned memory accesses with the 636 // same type since it could be overlapped accesses to the same array. 637 create_pack = false; 638 } else { 639 // Allow independent (different type) unaligned memory operations 640 // if HW supports them. 641 if (!Matcher::misaligned_vectors_ok() || AlignVector) { 642 create_pack = false; 643 } else { 644 // Check if packs of the same memory type but 645 // with a different alignment were created before. 646 for (uint i = 0; i < align_to_refs.size(); i++) { 647 MemNode* mr = align_to_refs.at(i)->as_Mem(); 648 if (mr == mem_ref) { 649 // Skip when we are looking at same memory operation. 650 continue; 651 } 652 if (same_velt_type(mr, mem_ref) && 653 memory_alignment(mr, iv_adjustment) != 0) 654 create_pack = false; 655 } 656 } 657 } 658 } 659 if (create_pack) { 660 for (uint i = 0; i < memops.size(); i++) { 661 Node* s1 = memops.at(i); 662 int align = alignment(s1); 663 if (align == top_align) continue; 664 for (uint j = 0; j < memops.size(); j++) { 665 Node* s2 = memops.at(j); 666 if (alignment(s2) == top_align) continue; 667 if (s1 != s2 && are_adjacent_refs(s1, s2)) { 668 if (stmts_can_pack(s1, s2, align)) { 669 Node_List* pair = new Node_List(); 670 pair->push(s1); 671 pair->push(s2); 672 if (!_do_vector_loop || same_origin_idx(s1, s2)) { 673 _packset.append(pair); 674 } 675 } 676 } 677 } 678 } 679 } else { // Don't create unaligned pack 680 // First, remove remaining memory ops of the same type from the list. 681 for (int i = memops.size() - 1; i >= 0; i--) { 682 MemNode* s = memops.at(i)->as_Mem(); 683 if (same_velt_type(s, mem_ref)) { 684 memops.remove(i); 685 } 686 } 687 688 // Second, remove already constructed packs of the same type. 689 for (int i = _packset.length() - 1; i >= 0; i--) { 690 Node_List* p = _packset.at(i); 691 MemNode* s = p->at(0)->as_Mem(); 692 if (same_velt_type(s, mem_ref)) { 693 remove_pack_at(i); 694 } 695 } 696 697 // If needed find the best memory reference for loop alignment again. 698 if (same_velt_type(mem_ref, best_align_to_mem_ref)) { 699 // Put memory ops from remaining packs back on memops list for 700 // the best alignment search. 701 uint orig_msize = memops.size(); 702 for (int i = 0; i < _packset.length(); i++) { 703 Node_List* p = _packset.at(i); 704 MemNode* s = p->at(0)->as_Mem(); 705 assert(!same_velt_type(s, mem_ref), "sanity"); 706 memops.push(s); 707 } 708 best_align_to_mem_ref = find_align_to_ref(memops); 709 if (best_align_to_mem_ref == NULL) { 710 if (TraceSuperWord) { 711 tty->print_cr("SuperWord::find_adjacent_refs(): best_align_to_mem_ref == NULL"); 712 } 713 break; 714 } 715 best_iv_adjustment = get_iv_adjustment(best_align_to_mem_ref); 716 NOT_PRODUCT(find_adjacent_refs_trace_1(best_align_to_mem_ref, best_iv_adjustment);) 717 // Restore list. 718 while (memops.size() > orig_msize) 719 (void)memops.pop(); 720 } 721 } // unaligned memory accesses 722 723 // Remove used mem nodes. 724 for (int i = memops.size() - 1; i >= 0; i--) { 725 MemNode* m = memops.at(i)->as_Mem(); 726 if (alignment(m) != top_align) { 727 memops.remove(i); 728 } 729 } 730 731 } // while (memops.size() != 0 732 set_align_to_ref(best_align_to_mem_ref); 733 734 if (TraceSuperWord) { 735 tty->print_cr("\nAfter find_adjacent_refs"); 736 print_packset(); 737 } 738 } 739 740 #ifndef PRODUCT 741 void SuperWord::find_adjacent_refs_trace_1(Node* best_align_to_mem_ref, int best_iv_adjustment) { 742 if (is_trace_adjacent()) { 743 tty->print("SuperWord::find_adjacent_refs best_align_to_mem_ref = %d, best_iv_adjustment = %d", 744 best_align_to_mem_ref->_idx, best_iv_adjustment); 745 best_align_to_mem_ref->dump(); 746 } 747 } 748 #endif 749 750 //------------------------------find_align_to_ref--------------------------- 751 // Find a memory reference to align the loop induction variable to. 752 // Looks first at stores then at loads, looking for a memory reference 753 // with the largest number of references similar to it. 754 MemNode* SuperWord::find_align_to_ref(Node_List &memops) { 755 GrowableArray<int> cmp_ct(arena(), memops.size(), memops.size(), 0); 756 757 // Count number of comparable memory ops 758 for (uint i = 0; i < memops.size(); i++) { 759 MemNode* s1 = memops.at(i)->as_Mem(); 760 SWPointer p1(s1, this, NULL, false); 761 // Discard if pre loop can't align this reference 762 if (!ref_is_alignable(p1)) { 763 *cmp_ct.adr_at(i) = 0; 764 continue; 765 } 766 for (uint j = i+1; j < memops.size(); j++) { 767 MemNode* s2 = memops.at(j)->as_Mem(); 768 if (isomorphic(s1, s2)) { 769 SWPointer p2(s2, this, NULL, false); 770 if (p1.comparable(p2)) { 771 (*cmp_ct.adr_at(i))++; 772 (*cmp_ct.adr_at(j))++; 773 } 774 } 775 } 776 } 777 778 // Find Store (or Load) with the greatest number of "comparable" references, 779 // biggest vector size, smallest data size and smallest iv offset. 780 int max_ct = 0; 781 int max_vw = 0; 782 int max_idx = -1; 783 int min_size = max_jint; 784 int min_iv_offset = max_jint; 785 for (uint j = 0; j < memops.size(); j++) { 786 MemNode* s = memops.at(j)->as_Mem(); 787 if (s->is_Store()) { 788 int vw = vector_width_in_bytes(s); 789 assert(vw > 1, "sanity"); 790 SWPointer p(s, this, NULL, false); 791 if ( cmp_ct.at(j) > max_ct || 792 (cmp_ct.at(j) == max_ct && 793 ( vw > max_vw || 794 (vw == max_vw && 795 ( data_size(s) < min_size || 796 (data_size(s) == min_size && 797 p.offset_in_bytes() < min_iv_offset)))))) { 798 max_ct = cmp_ct.at(j); 799 max_vw = vw; 800 max_idx = j; 801 min_size = data_size(s); 802 min_iv_offset = p.offset_in_bytes(); 803 } 804 } 805 } 806 // If no stores, look at loads 807 if (max_ct == 0) { 808 for (uint j = 0; j < memops.size(); j++) { 809 MemNode* s = memops.at(j)->as_Mem(); 810 if (s->is_Load()) { 811 int vw = vector_width_in_bytes(s); 812 assert(vw > 1, "sanity"); 813 SWPointer p(s, this, NULL, false); 814 if ( cmp_ct.at(j) > max_ct || 815 (cmp_ct.at(j) == max_ct && 816 ( vw > max_vw || 817 (vw == max_vw && 818 ( data_size(s) < min_size || 819 (data_size(s) == min_size && 820 p.offset_in_bytes() < min_iv_offset)))))) { 821 max_ct = cmp_ct.at(j); 822 max_vw = vw; 823 max_idx = j; 824 min_size = data_size(s); 825 min_iv_offset = p.offset_in_bytes(); 826 } 827 } 828 } 829 } 830 831 #ifdef ASSERT 832 if (TraceSuperWord && Verbose) { 833 tty->print_cr("\nVector memops after find_align_to_ref"); 834 for (uint i = 0; i < memops.size(); i++) { 835 MemNode* s = memops.at(i)->as_Mem(); 836 s->dump(); 837 } 838 } 839 #endif 840 841 if (max_ct > 0) { 842 #ifdef ASSERT 843 if (TraceSuperWord) { 844 tty->print("\nVector align to node: "); 845 memops.at(max_idx)->as_Mem()->dump(); 846 } 847 #endif 848 return memops.at(max_idx)->as_Mem(); 849 } 850 return NULL; 851 } 852 853 //------------------span_works_for_memory_size----------------------------- 854 static bool span_works_for_memory_size(MemNode* mem, int span, int mem_size, int offset) { 855 bool span_matches_memory = false; 856 if ((mem_size == type2aelembytes(T_BYTE) || mem_size == type2aelembytes(T_SHORT)) 857 && ABS(span) == type2aelembytes(T_INT)) { 858 // There is a mismatch on span size compared to memory. 859 for (DUIterator_Fast jmax, j = mem->fast_outs(jmax); j < jmax; j++) { 860 Node* use = mem->fast_out(j); 861 if (!VectorNode::is_type_transition_to_int(use)) { 862 return false; 863 } 864 } 865 // If all uses transition to integer, it means that we can successfully align even on mismatch. 866 return true; 867 } 868 else { 869 span_matches_memory = ABS(span) == mem_size; 870 } 871 return span_matches_memory && (ABS(offset) % mem_size) == 0; 872 } 873 874 //------------------------------ref_is_alignable--------------------------- 875 // Can the preloop align the reference to position zero in the vector? 876 bool SuperWord::ref_is_alignable(SWPointer& p) { 877 if (!p.has_iv()) { 878 return true; // no induction variable 879 } 880 CountedLoopEndNode* pre_end = get_pre_loop_end(lp()->as_CountedLoop()); 881 assert(pre_end != NULL, "we must have a correct pre-loop"); 882 assert(pre_end->stride_is_con(), "pre loop stride is constant"); 883 int preloop_stride = pre_end->stride_con(); 884 885 int span = preloop_stride * p.scale_in_bytes(); 886 int mem_size = p.memory_size(); 887 int offset = p.offset_in_bytes(); 888 // Stride one accesses are alignable if offset is aligned to memory operation size. 889 // Offset can be unaligned when UseUnalignedAccesses is used. 890 if (span_works_for_memory_size(p.mem(), span, mem_size, offset)) { 891 return true; 892 } 893 // If the initial offset from start of the object is computable, 894 // check if the pre-loop can align the final offset accordingly. 895 // 896 // In other words: Can we find an i such that the offset 897 // after i pre-loop iterations is aligned to vw? 898 // (init_offset + pre_loop) % vw == 0 (1) 899 // where 900 // pre_loop = i * span 901 // is the number of bytes added to the offset by i pre-loop iterations. 902 // 903 // For this to hold we need pre_loop to increase init_offset by 904 // pre_loop = vw - (init_offset % vw) 905 // 906 // This is only possible if pre_loop is divisible by span because each 907 // pre-loop iteration increases the initial offset by 'span' bytes: 908 // (vw - (init_offset % vw)) % span == 0 909 // 910 int vw = vector_width_in_bytes(p.mem()); 911 assert(vw > 1, "sanity"); 912 Node* init_nd = pre_end->init_trip(); 913 if (init_nd->is_Con() && p.invar() == NULL) { 914 int init = init_nd->bottom_type()->is_int()->get_con(); 915 int init_offset = init * p.scale_in_bytes() + offset; 916 if (init_offset < 0) { // negative offset from object start? 917 return false; // may happen in dead loop 918 } 919 if (vw % span == 0) { 920 // If vm is a multiple of span, we use formula (1). 921 if (span > 0) { 922 return (vw - (init_offset % vw)) % span == 0; 923 } else { 924 assert(span < 0, "nonzero stride * scale"); 925 return (init_offset % vw) % -span == 0; 926 } 927 } else if (span % vw == 0) { 928 // If span is a multiple of vw, we can simplify formula (1) to: 929 // (init_offset + i * span) % vw == 0 930 // => 931 // (init_offset % vw) + ((i * span) % vw) == 0 932 // => 933 // init_offset % vw == 0 934 // 935 // Because we add a multiple of vw to the initial offset, the final 936 // offset is a multiple of vw if and only if init_offset is a multiple. 937 // 938 return (init_offset % vw) == 0; 939 } 940 } 941 return false; 942 } 943 //---------------------------get_vw_bytes_special------------------------ 944 int SuperWord::get_vw_bytes_special(MemNode* s) { 945 // Get the vector width in bytes. 946 int vw = vector_width_in_bytes(s); 947 948 // Check for special case where there is an MulAddS2I usage where short vectors are going to need combined. 949 BasicType btype = velt_basic_type(s); 950 if (type2aelembytes(btype) == 2) { 951 bool should_combine_adjacent = true; 952 for (DUIterator_Fast imax, i = s->fast_outs(imax); i < imax; i++) { 953 Node* user = s->fast_out(i); 954 if (!VectorNode::is_muladds2i(user)) { 955 should_combine_adjacent = false; 956 } 957 } 958 if (should_combine_adjacent) { 959 vw = MIN2(Matcher::max_vector_size(btype)*type2aelembytes(btype), vw * 2); 960 } 961 } 962 963 return vw; 964 } 965 966 //---------------------------get_iv_adjustment--------------------------- 967 // Calculate loop's iv adjustment for this memory ops. 968 int SuperWord::get_iv_adjustment(MemNode* mem_ref) { 969 SWPointer align_to_ref_p(mem_ref, this, NULL, false); 970 int offset = align_to_ref_p.offset_in_bytes(); 971 int scale = align_to_ref_p.scale_in_bytes(); 972 int elt_size = align_to_ref_p.memory_size(); 973 int vw = get_vw_bytes_special(mem_ref); 974 assert(vw > 1, "sanity"); 975 int iv_adjustment; 976 if (scale != 0) { 977 int stride_sign = (scale * iv_stride()) > 0 ? 1 : -1; 978 // At least one iteration is executed in pre-loop by default. As result 979 // several iterations are needed to align memory operations in main-loop even 980 // if offset is 0. 981 int iv_adjustment_in_bytes = (stride_sign * vw - (offset % vw)); 982 assert(((ABS(iv_adjustment_in_bytes) % elt_size) == 0), 983 "(%d) should be divisible by (%d)", iv_adjustment_in_bytes, elt_size); 984 iv_adjustment = iv_adjustment_in_bytes/elt_size; 985 } else { 986 // This memory op is not dependent on iv (scale == 0) 987 iv_adjustment = 0; 988 } 989 990 #ifndef PRODUCT 991 if (TraceSuperWord) { 992 tty->print("SuperWord::get_iv_adjustment: n = %d, noffset = %d iv_adjust = %d elt_size = %d scale = %d iv_stride = %d vect_size %d: ", 993 mem_ref->_idx, offset, iv_adjustment, elt_size, scale, iv_stride(), vw); 994 mem_ref->dump(); 995 } 996 #endif 997 return iv_adjustment; 998 } 999 1000 //---------------------------dependence_graph--------------------------- 1001 // Construct dependency graph. 1002 // Add dependence edges to load/store nodes for memory dependence 1003 // A.out()->DependNode.in(1) and DependNode.out()->B.prec(x) 1004 void SuperWord::dependence_graph() { 1005 CountedLoopNode *cl = lpt()->_head->as_CountedLoop(); 1006 // First, assign a dependence node to each memory node 1007 for (int i = 0; i < _block.length(); i++ ) { 1008 Node *n = _block.at(i); 1009 if (n->is_Mem() || (n->is_Phi() && n->bottom_type() == Type::MEMORY)) { 1010 _dg.make_node(n); 1011 } 1012 } 1013 1014 // For each memory slice, create the dependences 1015 for (int i = 0; i < _mem_slice_head.length(); i++) { 1016 Node* n = _mem_slice_head.at(i); 1017 Node* n_tail = _mem_slice_tail.at(i); 1018 1019 // Get slice in predecessor order (last is first) 1020 if (cl->is_main_loop()) { 1021 mem_slice_preds(n_tail, n, _nlist); 1022 } 1023 1024 #ifndef PRODUCT 1025 if(TraceSuperWord && Verbose) { 1026 tty->print_cr("SuperWord::dependence_graph: built a new mem slice"); 1027 for (int j = _nlist.length() - 1; j >= 0 ; j--) { 1028 _nlist.at(j)->dump(); 1029 } 1030 } 1031 #endif 1032 // Make the slice dependent on the root 1033 DepMem* slice = _dg.dep(n); 1034 _dg.make_edge(_dg.root(), slice); 1035 1036 // Create a sink for the slice 1037 DepMem* slice_sink = _dg.make_node(NULL); 1038 _dg.make_edge(slice_sink, _dg.tail()); 1039 1040 // Now visit each pair of memory ops, creating the edges 1041 for (int j = _nlist.length() - 1; j >= 0 ; j--) { 1042 Node* s1 = _nlist.at(j); 1043 1044 // If no dependency yet, use slice 1045 if (_dg.dep(s1)->in_cnt() == 0) { 1046 _dg.make_edge(slice, s1); 1047 } 1048 SWPointer p1(s1->as_Mem(), this, NULL, false); 1049 bool sink_dependent = true; 1050 for (int k = j - 1; k >= 0; k--) { 1051 Node* s2 = _nlist.at(k); 1052 if (s1->is_Load() && s2->is_Load()) 1053 continue; 1054 SWPointer p2(s2->as_Mem(), this, NULL, false); 1055 1056 int cmp = p1.cmp(p2); 1057 if (SuperWordRTDepCheck && 1058 p1.base() != p2.base() && p1.valid() && p2.valid()) { 1059 // Create a runtime check to disambiguate 1060 OrderedPair pp(p1.base(), p2.base()); 1061 _disjoint_ptrs.append_if_missing(pp); 1062 } else if (!SWPointer::not_equal(cmp)) { 1063 // Possibly same address 1064 _dg.make_edge(s1, s2); 1065 sink_dependent = false; 1066 } 1067 } 1068 if (sink_dependent) { 1069 _dg.make_edge(s1, slice_sink); 1070 } 1071 } 1072 1073 if (TraceSuperWord) { 1074 tty->print_cr("\nDependence graph for slice: %d", n->_idx); 1075 for (int q = 0; q < _nlist.length(); q++) { 1076 _dg.print(_nlist.at(q)); 1077 } 1078 tty->cr(); 1079 } 1080 1081 _nlist.clear(); 1082 } 1083 1084 if (TraceSuperWord) { 1085 tty->print_cr("\ndisjoint_ptrs: %s", _disjoint_ptrs.length() > 0 ? "" : "NONE"); 1086 for (int r = 0; r < _disjoint_ptrs.length(); r++) { 1087 _disjoint_ptrs.at(r).print(); 1088 tty->cr(); 1089 } 1090 tty->cr(); 1091 } 1092 1093 } 1094 1095 //---------------------------mem_slice_preds--------------------------- 1096 // Return a memory slice (node list) in predecessor order starting at "start" 1097 void SuperWord::mem_slice_preds(Node* start, Node* stop, GrowableArray<Node*> &preds) { 1098 assert(preds.length() == 0, "start empty"); 1099 Node* n = start; 1100 Node* prev = NULL; 1101 while (true) { 1102 NOT_PRODUCT( if(is_trace_mem_slice()) tty->print_cr("SuperWord::mem_slice_preds: n %d", n->_idx);) 1103 assert(in_bb(n), "must be in block"); 1104 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { 1105 Node* out = n->fast_out(i); 1106 if (out->is_Load()) { 1107 if (in_bb(out)) { 1108 preds.push(out); 1109 if (TraceSuperWord && Verbose) { 1110 tty->print_cr("SuperWord::mem_slice_preds: added pred(%d)", out->_idx); 1111 } 1112 } 1113 } else { 1114 // FIXME 1115 if (out->is_MergeMem() && !in_bb(out)) { 1116 // Either unrolling is causing a memory edge not to disappear, 1117 // or need to run igvn.optimize() again before SLP 1118 } else if (out->is_Phi() && out->bottom_type() == Type::MEMORY && !in_bb(out)) { 1119 // Ditto. Not sure what else to check further. 1120 } else if (out->Opcode() == Op_StoreCM && out->in(MemNode::OopStore) == n) { 1121 // StoreCM has an input edge used as a precedence edge. 1122 // Maybe an issue when oop stores are vectorized. 1123 } else { 1124 assert(out == prev || prev == NULL, "no branches off of store slice"); 1125 } 1126 }//else 1127 }//for 1128 if (n == stop) break; 1129 preds.push(n); 1130 if (TraceSuperWord && Verbose) { 1131 tty->print_cr("SuperWord::mem_slice_preds: added pred(%d)", n->_idx); 1132 } 1133 prev = n; 1134 assert(n->is_Mem(), "unexpected node %s", n->Name()); 1135 n = n->in(MemNode::Memory); 1136 } 1137 } 1138 1139 //------------------------------stmts_can_pack--------------------------- 1140 // Can s1 and s2 be in a pack with s1 immediately preceding s2 and 1141 // s1 aligned at "align" 1142 bool SuperWord::stmts_can_pack(Node* s1, Node* s2, int align) { 1143 1144 // Do not use superword for non-primitives 1145 BasicType bt1 = velt_basic_type(s1); 1146 BasicType bt2 = velt_basic_type(s2); 1147 if(!is_java_primitive(bt1) || !is_java_primitive(bt2)) 1148 return false; 1149 if (Matcher::max_vector_size(bt1) < 2) { 1150 return false; // No vectors for this type 1151 } 1152 1153 if (isomorphic(s1, s2)) { 1154 if ((independent(s1, s2) && have_similar_inputs(s1, s2)) || reduction(s1, s2)) { 1155 if (!exists_at(s1, 0) && !exists_at(s2, 1)) { 1156 if (!s1->is_Mem() || are_adjacent_refs(s1, s2)) { 1157 int s1_align = alignment(s1); 1158 int s2_align = alignment(s2); 1159 if (s1_align == top_align || s1_align == align) { 1160 if (s2_align == top_align || s2_align == align + data_size(s1)) { 1161 return true; 1162 } 1163 } 1164 } 1165 } 1166 } 1167 } 1168 return false; 1169 } 1170 1171 //------------------------------exists_at--------------------------- 1172 // Does s exist in a pack at position pos? 1173 bool SuperWord::exists_at(Node* s, uint pos) { 1174 for (int i = 0; i < _packset.length(); i++) { 1175 Node_List* p = _packset.at(i); 1176 if (p->at(pos) == s) { 1177 return true; 1178 } 1179 } 1180 return false; 1181 } 1182 1183 //------------------------------are_adjacent_refs--------------------------- 1184 // Is s1 immediately before s2 in memory? 1185 bool SuperWord::are_adjacent_refs(Node* s1, Node* s2) { 1186 if (!s1->is_Mem() || !s2->is_Mem()) return false; 1187 if (!in_bb(s1) || !in_bb(s2)) return false; 1188 1189 // Do not use superword for non-primitives 1190 if (!is_java_primitive(s1->as_Mem()->memory_type()) || 1191 !is_java_primitive(s2->as_Mem()->memory_type())) { 1192 return false; 1193 } 1194 1195 // FIXME - co_locate_pack fails on Stores in different mem-slices, so 1196 // only pack memops that are in the same alias set until that's fixed. 1197 if (_phase->C->get_alias_index(s1->as_Mem()->adr_type()) != 1198 _phase->C->get_alias_index(s2->as_Mem()->adr_type())) 1199 return false; 1200 SWPointer p1(s1->as_Mem(), this, NULL, false); 1201 SWPointer p2(s2->as_Mem(), this, NULL, false); 1202 if (p1.base() != p2.base() || !p1.comparable(p2)) return false; 1203 int diff = p2.offset_in_bytes() - p1.offset_in_bytes(); 1204 return diff == data_size(s1); 1205 } 1206 1207 //------------------------------isomorphic--------------------------- 1208 // Are s1 and s2 similar? 1209 bool SuperWord::isomorphic(Node* s1, Node* s2) { 1210 if (s1->Opcode() != s2->Opcode()) return false; 1211 if (s1->req() != s2->req()) return false; 1212 if (!same_velt_type(s1, s2)) return false; 1213 Node* s1_ctrl = s1->in(0); 1214 Node* s2_ctrl = s2->in(0); 1215 // If the control nodes are equivalent, no further checks are required to test for isomorphism. 1216 if (s1_ctrl == s2_ctrl) { 1217 return true; 1218 } else { 1219 bool s1_ctrl_inv = ((s1_ctrl == NULL) ? true : lpt()->is_invariant(s1_ctrl)); 1220 bool s2_ctrl_inv = ((s2_ctrl == NULL) ? true : lpt()->is_invariant(s2_ctrl)); 1221 // If the control nodes are not invariant for the loop, fail isomorphism test. 1222 if (!s1_ctrl_inv || !s2_ctrl_inv) { 1223 return false; 1224 } 1225 if(s1_ctrl != NULL && s2_ctrl != NULL) { 1226 if (s1_ctrl->is_Proj()) { 1227 s1_ctrl = s1_ctrl->in(0); 1228 assert(lpt()->is_invariant(s1_ctrl), "must be invariant"); 1229 } 1230 if (s2_ctrl->is_Proj()) { 1231 s2_ctrl = s2_ctrl->in(0); 1232 assert(lpt()->is_invariant(s2_ctrl), "must be invariant"); 1233 } 1234 if (!s1_ctrl->is_RangeCheck() || !s2_ctrl->is_RangeCheck()) { 1235 return false; 1236 } 1237 } 1238 // Control nodes are invariant. However, we have no way of checking whether they resolve 1239 // in an equivalent manner. But, we know that invariant range checks are guaranteed to 1240 // throw before the loop (if they would have thrown). Thus, the loop would not have been reached. 1241 // Therefore, if the control nodes for both are range checks, we accept them to be isomorphic. 1242 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { 1243 Node* t1 = s1->fast_out(i); 1244 for (DUIterator_Fast jmax, j = s2->fast_outs(jmax); j < jmax; j++) { 1245 Node* t2 = s2->fast_out(j); 1246 if (VectorNode::is_muladds2i(t1) && VectorNode::is_muladds2i(t2)) { 1247 return true; 1248 } 1249 } 1250 } 1251 } 1252 return false; 1253 } 1254 1255 //------------------------------independent--------------------------- 1256 // Is there no data path from s1 to s2 or s2 to s1? 1257 bool SuperWord::independent(Node* s1, Node* s2) { 1258 // assert(s1->Opcode() == s2->Opcode(), "check isomorphic first"); 1259 int d1 = depth(s1); 1260 int d2 = depth(s2); 1261 if (d1 == d2) return s1 != s2; 1262 Node* deep = d1 > d2 ? s1 : s2; 1263 Node* shallow = d1 > d2 ? s2 : s1; 1264 1265 visited_clear(); 1266 1267 return independent_path(shallow, deep); 1268 } 1269 1270 //--------------------------have_similar_inputs----------------------- 1271 // For a node pair (s1, s2) which is isomorphic and independent, 1272 // do s1 and s2 have similar input edges? 1273 bool SuperWord::have_similar_inputs(Node* s1, Node* s2) { 1274 // assert(isomorphic(s1, s2) == true, "check isomorphic"); 1275 // assert(independent(s1, s2) == true, "check independent"); 1276 if (s1->req() > 1 && !s1->is_Store() && !s1->is_Load()) { 1277 for (uint i = 1; i < s1->req(); i++) { 1278 if (s1->in(i)->Opcode() != s2->in(i)->Opcode()) return false; 1279 } 1280 } 1281 return true; 1282 } 1283 1284 //------------------------------reduction--------------------------- 1285 // Is there a data path between s1 and s2 and the nodes reductions? 1286 bool SuperWord::reduction(Node* s1, Node* s2) { 1287 bool retValue = false; 1288 int d1 = depth(s1); 1289 int d2 = depth(s2); 1290 if (d1 + 1 == d2) { 1291 if (s1->is_reduction() && s2->is_reduction()) { 1292 // This is an ordered set, so s1 should define s2 1293 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { 1294 Node* t1 = s1->fast_out(i); 1295 if (t1 == s2) { 1296 // both nodes are reductions and connected 1297 retValue = true; 1298 } 1299 } 1300 } 1301 } 1302 1303 return retValue; 1304 } 1305 1306 //------------------------------independent_path------------------------------ 1307 // Helper for independent 1308 bool SuperWord::independent_path(Node* shallow, Node* deep, uint dp) { 1309 if (dp >= 1000) return false; // stop deep recursion 1310 visited_set(deep); 1311 int shal_depth = depth(shallow); 1312 assert(shal_depth <= depth(deep), "must be"); 1313 for (DepPreds preds(deep, _dg); !preds.done(); preds.next()) { 1314 Node* pred = preds.current(); 1315 if (in_bb(pred) && !visited_test(pred)) { 1316 if (shallow == pred) { 1317 return false; 1318 } 1319 if (shal_depth < depth(pred) && !independent_path(shallow, pred, dp+1)) { 1320 return false; 1321 } 1322 } 1323 } 1324 return true; 1325 } 1326 1327 //------------------------------set_alignment--------------------------- 1328 void SuperWord::set_alignment(Node* s1, Node* s2, int align) { 1329 set_alignment(s1, align); 1330 if (align == top_align || align == bottom_align) { 1331 set_alignment(s2, align); 1332 } else { 1333 set_alignment(s2, align + data_size(s1)); 1334 } 1335 } 1336 1337 //------------------------------data_size--------------------------- 1338 int SuperWord::data_size(Node* s) { 1339 Node* use = NULL; //test if the node is a candidate for CMoveV optimization, then return the size of CMov 1340 if (UseVectorCmov) { 1341 use = _cmovev_kit.is_Bool_candidate(s); 1342 if (use != NULL) { 1343 return data_size(use); 1344 } 1345 use = _cmovev_kit.is_CmpD_candidate(s); 1346 if (use != NULL) { 1347 return data_size(use); 1348 } 1349 } 1350 1351 int bsize = type2aelembytes(velt_basic_type(s)); 1352 assert(bsize != 0, "valid size"); 1353 return bsize; 1354 } 1355 1356 //------------------------------extend_packlist--------------------------- 1357 // Extend packset by following use->def and def->use links from pack members. 1358 void SuperWord::extend_packlist() { 1359 bool changed; 1360 do { 1361 packset_sort(_packset.length()); 1362 changed = false; 1363 for (int i = 0; i < _packset.length(); i++) { 1364 Node_List* p = _packset.at(i); 1365 changed |= follow_use_defs(p); 1366 changed |= follow_def_uses(p); 1367 } 1368 } while (changed); 1369 1370 if (_race_possible) { 1371 for (int i = 0; i < _packset.length(); i++) { 1372 Node_List* p = _packset.at(i); 1373 order_def_uses(p); 1374 } 1375 } 1376 1377 if (TraceSuperWord) { 1378 tty->print_cr("\nAfter extend_packlist"); 1379 print_packset(); 1380 } 1381 } 1382 1383 //------------------------------follow_use_defs--------------------------- 1384 // Extend the packset by visiting operand definitions of nodes in pack p 1385 bool SuperWord::follow_use_defs(Node_List* p) { 1386 assert(p->size() == 2, "just checking"); 1387 Node* s1 = p->at(0); 1388 Node* s2 = p->at(1); 1389 assert(s1->req() == s2->req(), "just checking"); 1390 assert(alignment(s1) + data_size(s1) == alignment(s2), "just checking"); 1391 1392 if (s1->is_Load()) return false; 1393 1394 int align = alignment(s1); 1395 NOT_PRODUCT(if(is_trace_alignment()) tty->print_cr("SuperWord::follow_use_defs: s1 %d, align %d", s1->_idx, align);) 1396 bool changed = false; 1397 int start = s1->is_Store() ? MemNode::ValueIn : 1; 1398 int end = s1->is_Store() ? MemNode::ValueIn+1 : s1->req(); 1399 for (int j = start; j < end; j++) { 1400 Node* t1 = s1->in(j); 1401 Node* t2 = s2->in(j); 1402 if (!in_bb(t1) || !in_bb(t2)) 1403 continue; 1404 if (stmts_can_pack(t1, t2, align)) { 1405 if (est_savings(t1, t2) >= 0) { 1406 Node_List* pair = new Node_List(); 1407 pair->push(t1); 1408 pair->push(t2); 1409 _packset.append(pair); 1410 NOT_PRODUCT(if(is_trace_alignment()) tty->print_cr("SuperWord::follow_use_defs: set_alignment(%d, %d, %d)", t1->_idx, t2->_idx, align);) 1411 set_alignment(t1, t2, align); 1412 changed = true; 1413 } 1414 } 1415 } 1416 return changed; 1417 } 1418 1419 //------------------------------follow_def_uses--------------------------- 1420 // Extend the packset by visiting uses of nodes in pack p 1421 bool SuperWord::follow_def_uses(Node_List* p) { 1422 bool changed = false; 1423 Node* s1 = p->at(0); 1424 Node* s2 = p->at(1); 1425 assert(p->size() == 2, "just checking"); 1426 assert(s1->req() == s2->req(), "just checking"); 1427 assert(alignment(s1) + data_size(s1) == alignment(s2), "just checking"); 1428 1429 if (s1->is_Store()) return false; 1430 1431 int align = alignment(s1); 1432 NOT_PRODUCT(if(is_trace_alignment()) tty->print_cr("SuperWord::follow_def_uses: s1 %d, align %d", s1->_idx, align);) 1433 int savings = -1; 1434 int num_s1_uses = 0; 1435 Node* u1 = NULL; 1436 Node* u2 = NULL; 1437 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { 1438 Node* t1 = s1->fast_out(i); 1439 num_s1_uses++; 1440 if (!in_bb(t1)) continue; 1441 for (DUIterator_Fast jmax, j = s2->fast_outs(jmax); j < jmax; j++) { 1442 Node* t2 = s2->fast_out(j); 1443 if (!in_bb(t2)) continue; 1444 if (t2->Opcode() == Op_AddI && t2 == _lp->as_CountedLoop()->incr()) continue; // don't mess with the iv 1445 if (!opnd_positions_match(s1, t1, s2, t2)) 1446 continue; 1447 if (stmts_can_pack(t1, t2, align)) { 1448 int my_savings = est_savings(t1, t2); 1449 if (my_savings > savings) { 1450 savings = my_savings; 1451 u1 = t1; 1452 u2 = t2; 1453 } 1454 } 1455 } 1456 } 1457 if (num_s1_uses > 1) { 1458 _race_possible = true; 1459 } 1460 if (savings >= 0) { 1461 Node_List* pair = new Node_List(); 1462 pair->push(u1); 1463 pair->push(u2); 1464 _packset.append(pair); 1465 NOT_PRODUCT(if(is_trace_alignment()) tty->print_cr("SuperWord::follow_def_uses: set_alignment(%d, %d, %d)", u1->_idx, u2->_idx, align);) 1466 set_alignment(u1, u2, align); 1467 changed = true; 1468 } 1469 return changed; 1470 } 1471 1472 //------------------------------order_def_uses--------------------------- 1473 // For extended packsets, ordinally arrange uses packset by major component 1474 void SuperWord::order_def_uses(Node_List* p) { 1475 Node* s1 = p->at(0); 1476 1477 if (s1->is_Store()) return; 1478 1479 // reductions are always managed beforehand 1480 if (s1->is_reduction()) return; 1481 1482 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { 1483 Node* t1 = s1->fast_out(i); 1484 1485 // Only allow operand swap on commuting operations 1486 if (!t1->is_Add() && !t1->is_Mul() && !VectorNode::is_muladds2i(t1)) { 1487 break; 1488 } 1489 1490 // Now find t1's packset 1491 Node_List* p2 = NULL; 1492 for (int j = 0; j < _packset.length(); j++) { 1493 p2 = _packset.at(j); 1494 Node* first = p2->at(0); 1495 if (t1 == first) { 1496 break; 1497 } 1498 p2 = NULL; 1499 } 1500 // Arrange all sub components by the major component 1501 if (p2 != NULL) { 1502 for (uint j = 1; j < p->size(); j++) { 1503 Node* d1 = p->at(j); 1504 Node* u1 = p2->at(j); 1505 opnd_positions_match(s1, t1, d1, u1); 1506 } 1507 } 1508 } 1509 } 1510 1511 //---------------------------opnd_positions_match------------------------- 1512 // Is the use of d1 in u1 at the same operand position as d2 in u2? 1513 bool SuperWord::opnd_positions_match(Node* d1, Node* u1, Node* d2, Node* u2) { 1514 // check reductions to see if they are marshalled to represent the reduction 1515 // operator in a specified opnd 1516 if (u1->is_reduction() && u2->is_reduction()) { 1517 // ensure reductions have phis and reduction definitions feeding the 1st operand 1518 Node* first = u1->in(2); 1519 if (first->is_Phi() || first->is_reduction()) { 1520 u1->swap_edges(1, 2); 1521 } 1522 // ensure reductions have phis and reduction definitions feeding the 1st operand 1523 first = u2->in(2); 1524 if (first->is_Phi() || first->is_reduction()) { 1525 u2->swap_edges(1, 2); 1526 } 1527 return true; 1528 } 1529 1530 uint ct = u1->req(); 1531 if (ct != u2->req()) return false; 1532 uint i1 = 0; 1533 uint i2 = 0; 1534 do { 1535 for (i1++; i1 < ct; i1++) if (u1->in(i1) == d1) break; 1536 for (i2++; i2 < ct; i2++) if (u2->in(i2) == d2) break; 1537 if (i1 != i2) { 1538 if ((i1 == (3-i2)) && (u2->is_Add() || u2->is_Mul())) { 1539 // Further analysis relies on operands position matching. 1540 u2->swap_edges(i1, i2); 1541 } else if (VectorNode::is_muladds2i(u2) && u1 != u2) { 1542 if (i1 == 5 - i2) { // ((i1 == 3 && i2 == 2) || (i1 == 2 && i2 == 3) || (i1 == 1 && i2 == 4) || (i1 == 4 && i2 == 1)) 1543 u2->swap_edges(1, 2); 1544 u2->swap_edges(3, 4); 1545 } 1546 if (i1 == 3 - i2 || i1 == 7 - i2) { // ((i1 == 1 && i2 == 2) || (i1 == 2 && i2 == 1) || (i1 == 3 && i2 == 4) || (i1 == 4 && i2 == 3)) 1547 u2->swap_edges(2, 3); 1548 u2->swap_edges(1, 4); 1549 } 1550 return false; // Just swap the edges, the muladds2i nodes get packed in follow_use_defs 1551 } else { 1552 return false; 1553 } 1554 } else if (i1 == i2 && VectorNode::is_muladds2i(u2) && u1 != u2) { 1555 u2->swap_edges(1, 3); 1556 u2->swap_edges(2, 4); 1557 return false; // Just swap the edges, the muladds2i nodes get packed in follow_use_defs 1558 } 1559 } while (i1 < ct); 1560 return true; 1561 } 1562 1563 //------------------------------est_savings--------------------------- 1564 // Estimate the savings from executing s1 and s2 as a pack 1565 int SuperWord::est_savings(Node* s1, Node* s2) { 1566 int save_in = 2 - 1; // 2 operations per instruction in packed form 1567 1568 // inputs 1569 for (uint i = 1; i < s1->req(); i++) { 1570 Node* x1 = s1->in(i); 1571 Node* x2 = s2->in(i); 1572 if (x1 != x2) { 1573 if (are_adjacent_refs(x1, x2)) { 1574 save_in += adjacent_profit(x1, x2); 1575 } else if (!in_packset(x1, x2)) { 1576 save_in -= pack_cost(2); 1577 } else { 1578 save_in += unpack_cost(2); 1579 } 1580 } 1581 } 1582 1583 // uses of result 1584 uint ct = 0; 1585 int save_use = 0; 1586 for (DUIterator_Fast imax, i = s1->fast_outs(imax); i < imax; i++) { 1587 Node* s1_use = s1->fast_out(i); 1588 for (int j = 0; j < _packset.length(); j++) { 1589 Node_List* p = _packset.at(j); 1590 if (p->at(0) == s1_use) { 1591 for (DUIterator_Fast kmax, k = s2->fast_outs(kmax); k < kmax; k++) { 1592 Node* s2_use = s2->fast_out(k); 1593 if (p->at(p->size()-1) == s2_use) { 1594 ct++; 1595 if (are_adjacent_refs(s1_use, s2_use)) { 1596 save_use += adjacent_profit(s1_use, s2_use); 1597 } 1598 } 1599 } 1600 } 1601 } 1602 } 1603 1604 if (ct < s1->outcnt()) save_use += unpack_cost(1); 1605 if (ct < s2->outcnt()) save_use += unpack_cost(1); 1606 1607 return MAX2(save_in, save_use); 1608 } 1609 1610 //------------------------------costs--------------------------- 1611 int SuperWord::adjacent_profit(Node* s1, Node* s2) { return 2; } 1612 int SuperWord::pack_cost(int ct) { return ct; } 1613 int SuperWord::unpack_cost(int ct) { return ct; } 1614 1615 //------------------------------combine_packs--------------------------- 1616 // Combine packs A and B with A.last == B.first into A.first..,A.last,B.second,..B.last 1617 void SuperWord::combine_packs() { 1618 bool changed = true; 1619 // Combine packs regardless max vector size. 1620 while (changed) { 1621 changed = false; 1622 for (int i = 0; i < _packset.length(); i++) { 1623 Node_List* p1 = _packset.at(i); 1624 if (p1 == NULL) continue; 1625 // Because of sorting we can start at i + 1 1626 for (int j = i + 1; j < _packset.length(); j++) { 1627 Node_List* p2 = _packset.at(j); 1628 if (p2 == NULL) continue; 1629 if (i == j) continue; 1630 if (p1->at(p1->size()-1) == p2->at(0)) { 1631 for (uint k = 1; k < p2->size(); k++) { 1632 p1->push(p2->at(k)); 1633 } 1634 _packset.at_put(j, NULL); 1635 changed = true; 1636 } 1637 } 1638 } 1639 } 1640 1641 // Split packs which have size greater then max vector size. 1642 for (int i = 0; i < _packset.length(); i++) { 1643 Node_List* p1 = _packset.at(i); 1644 if (p1 != NULL) { 1645 BasicType bt = velt_basic_type(p1->at(0)); 1646 uint max_vlen = Matcher::max_vector_size(bt); // Max elements in vector 1647 assert(is_power_of_2(max_vlen), "sanity"); 1648 uint psize = p1->size(); 1649 if (!is_power_of_2(psize)) { 1650 // Skip pack which can't be vector. 1651 // case1: for(...) { a[i] = i; } elements values are different (i+x) 1652 // case2: for(...) { a[i] = b[i+1]; } can't align both, load and store 1653 _packset.at_put(i, NULL); 1654 continue; 1655 } 1656 if (psize > max_vlen) { 1657 Node_List* pack = new Node_List(); 1658 for (uint j = 0; j < psize; j++) { 1659 pack->push(p1->at(j)); 1660 if (pack->size() >= max_vlen) { 1661 assert(is_power_of_2(pack->size()), "sanity"); 1662 _packset.append(pack); 1663 pack = new Node_List(); 1664 } 1665 } 1666 _packset.at_put(i, NULL); 1667 } 1668 } 1669 } 1670 1671 // Compress list. 1672 for (int i = _packset.length() - 1; i >= 0; i--) { 1673 Node_List* p1 = _packset.at(i); 1674 if (p1 == NULL) { 1675 _packset.remove_at(i); 1676 } 1677 } 1678 1679 if (TraceSuperWord) { 1680 tty->print_cr("\nAfter combine_packs"); 1681 print_packset(); 1682 } 1683 } 1684 1685 //-----------------------------construct_my_pack_map-------------------------- 1686 // Construct the map from nodes to packs. Only valid after the 1687 // point where a node is only in one pack (after combine_packs). 1688 void SuperWord::construct_my_pack_map() { 1689 Node_List* rslt = NULL; 1690 for (int i = 0; i < _packset.length(); i++) { 1691 Node_List* p = _packset.at(i); 1692 for (uint j = 0; j < p->size(); j++) { 1693 Node* s = p->at(j); 1694 assert(my_pack(s) == NULL, "only in one pack"); 1695 set_my_pack(s, p); 1696 } 1697 } 1698 } 1699 1700 //------------------------------filter_packs--------------------------- 1701 // Remove packs that are not implemented or not profitable. 1702 void SuperWord::filter_packs() { 1703 // Remove packs that are not implemented 1704 for (int i = _packset.length() - 1; i >= 0; i--) { 1705 Node_List* pk = _packset.at(i); 1706 bool impl = implemented(pk); 1707 if (!impl) { 1708 #ifndef PRODUCT 1709 if (TraceSuperWord && Verbose) { 1710 tty->print_cr("Unimplemented"); 1711 pk->at(0)->dump(); 1712 } 1713 #endif 1714 remove_pack_at(i); 1715 } 1716 Node *n = pk->at(0); 1717 if (n->is_reduction()) { 1718 _num_reductions++; 1719 } else { 1720 _num_work_vecs++; 1721 } 1722 } 1723 1724 // Remove packs that are not profitable 1725 bool changed; 1726 do { 1727 changed = false; 1728 for (int i = _packset.length() - 1; i >= 0; i--) { 1729 Node_List* pk = _packset.at(i); 1730 bool prof = profitable(pk); 1731 if (!prof) { 1732 #ifndef PRODUCT 1733 if (TraceSuperWord && Verbose) { 1734 tty->print_cr("Unprofitable"); 1735 pk->at(0)->dump(); 1736 } 1737 #endif 1738 remove_pack_at(i); 1739 changed = true; 1740 } 1741 } 1742 } while (changed); 1743 1744 #ifndef PRODUCT 1745 if (TraceSuperWord) { 1746 tty->print_cr("\nAfter filter_packs"); 1747 print_packset(); 1748 tty->cr(); 1749 } 1750 #endif 1751 } 1752 1753 //------------------------------merge_packs_to_cmovd--------------------------- 1754 // Merge CMoveD into new vector-nodes 1755 // We want to catch this pattern and subsume CmpD and Bool into CMoveD 1756 // 1757 // SubD ConD 1758 // / | / 1759 // / | / / 1760 // / | / / 1761 // / | / / 1762 // / / / 1763 // / / | / 1764 // v / | / 1765 // CmpD | / 1766 // | | / 1767 // v | / 1768 // Bool | / 1769 // \ | / 1770 // \ | / 1771 // \ | / 1772 // \ | / 1773 // \ v / 1774 // CMoveD 1775 // 1776 1777 void SuperWord::merge_packs_to_cmovd() { 1778 for (int i = _packset.length() - 1; i >= 0; i--) { 1779 _cmovev_kit.make_cmovevd_pack(_packset.at(i)); 1780 } 1781 #ifndef PRODUCT 1782 if (TraceSuperWord) { 1783 tty->print_cr("\nSuperWord::merge_packs_to_cmovd(): After merge"); 1784 print_packset(); 1785 tty->cr(); 1786 } 1787 #endif 1788 } 1789 1790 Node* CMoveKit::is_Bool_candidate(Node* def) const { 1791 Node* use = NULL; 1792 if (!def->is_Bool() || def->in(0) != NULL || def->outcnt() != 1) { 1793 return NULL; 1794 } 1795 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { 1796 use = def->fast_out(j); 1797 if (!_sw->same_generation(def, use) || !use->is_CMove()) { 1798 return NULL; 1799 } 1800 } 1801 return use; 1802 } 1803 1804 Node* CMoveKit::is_CmpD_candidate(Node* def) const { 1805 Node* use = NULL; 1806 if (!def->is_Cmp() || def->in(0) != NULL || def->outcnt() != 1) { 1807 return NULL; 1808 } 1809 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { 1810 use = def->fast_out(j); 1811 if (!_sw->same_generation(def, use) || (use = is_Bool_candidate(use)) == NULL || !_sw->same_generation(def, use)) { 1812 return NULL; 1813 } 1814 } 1815 return use; 1816 } 1817 1818 Node_List* CMoveKit::make_cmovevd_pack(Node_List* cmovd_pk) { 1819 Node *cmovd = cmovd_pk->at(0); 1820 if (!cmovd->is_CMove()) { 1821 return NULL; 1822 } 1823 if (cmovd->Opcode() != Op_CMoveF && cmovd->Opcode() != Op_CMoveD) { 1824 return NULL; 1825 } 1826 if (pack(cmovd) != NULL) { // already in the cmov pack 1827 return NULL; 1828 } 1829 if (cmovd->in(0) != NULL) { 1830 NOT_PRODUCT(if(_sw->is_trace_cmov()) {tty->print("CMoveKit::make_cmovevd_pack: CMoveD %d has control flow, escaping...", cmovd->_idx); cmovd->dump();}) 1831 return NULL; 1832 } 1833 1834 Node* bol = cmovd->as_CMove()->in(CMoveNode::Condition); 1835 if (!bol->is_Bool() 1836 || bol->outcnt() != 1 1837 || !_sw->same_generation(bol, cmovd) 1838 || bol->in(0) != NULL // BoolNode has control flow!! 1839 || _sw->my_pack(bol) == NULL) { 1840 NOT_PRODUCT(if(_sw->is_trace_cmov()) {tty->print("CMoveKit::make_cmovevd_pack: Bool %d does not fit CMoveD %d for building vector, escaping...", bol->_idx, cmovd->_idx); bol->dump();}) 1841 return NULL; 1842 } 1843 Node_List* bool_pk = _sw->my_pack(bol); 1844 if (bool_pk->size() != cmovd_pk->size() ) { 1845 return NULL; 1846 } 1847 1848 Node* cmpd = bol->in(1); 1849 if (!cmpd->is_Cmp() 1850 || cmpd->outcnt() != 1 1851 || !_sw->same_generation(cmpd, cmovd) 1852 || cmpd->in(0) != NULL // CmpDNode has control flow!! 1853 || _sw->my_pack(cmpd) == NULL) { 1854 NOT_PRODUCT(if(_sw->is_trace_cmov()) {tty->print("CMoveKit::make_cmovevd_pack: CmpD %d does not fit CMoveD %d for building vector, escaping...", cmpd->_idx, cmovd->_idx); cmpd->dump();}) 1855 return NULL; 1856 } 1857 Node_List* cmpd_pk = _sw->my_pack(cmpd); 1858 if (cmpd_pk->size() != cmovd_pk->size() ) { 1859 return NULL; 1860 } 1861 1862 if (!test_cmpd_pack(cmpd_pk, cmovd_pk)) { 1863 NOT_PRODUCT(if(_sw->is_trace_cmov()) {tty->print("CMoveKit::make_cmovevd_pack: cmpd pack for CmpD %d failed vectorization test", cmpd->_idx); cmpd->dump();}) 1864 return NULL; 1865 } 1866 1867 Node_List* new_cmpd_pk = new Node_List(); 1868 uint sz = cmovd_pk->size() - 1; 1869 for (uint i = 0; i <= sz; ++i) { 1870 Node* cmov = cmovd_pk->at(i); 1871 Node* bol = bool_pk->at(i); 1872 Node* cmp = cmpd_pk->at(i); 1873 1874 new_cmpd_pk->insert(i, cmov); 1875 1876 map(cmov, new_cmpd_pk); 1877 map(bol, new_cmpd_pk); 1878 map(cmp, new_cmpd_pk); 1879 1880 _sw->set_my_pack(cmov, new_cmpd_pk); // and keep old packs for cmp and bool 1881 } 1882 _sw->_packset.remove(cmovd_pk); 1883 _sw->_packset.remove(bool_pk); 1884 _sw->_packset.remove(cmpd_pk); 1885 _sw->_packset.append(new_cmpd_pk); 1886 NOT_PRODUCT(if(_sw->is_trace_cmov()) {tty->print_cr("CMoveKit::make_cmovevd_pack: added syntactic CMoveD pack"); _sw->print_pack(new_cmpd_pk);}) 1887 return new_cmpd_pk; 1888 } 1889 1890 bool CMoveKit::test_cmpd_pack(Node_List* cmpd_pk, Node_List* cmovd_pk) { 1891 Node* cmpd0 = cmpd_pk->at(0); 1892 assert(cmpd0->is_Cmp(), "CMoveKit::test_cmpd_pack: should be CmpDNode"); 1893 assert(cmovd_pk->at(0)->is_CMove(), "CMoveKit::test_cmpd_pack: should be CMoveD"); 1894 assert(cmpd_pk->size() == cmovd_pk->size(), "CMoveKit::test_cmpd_pack: should be same size"); 1895 Node* in1 = cmpd0->in(1); 1896 Node* in2 = cmpd0->in(2); 1897 Node_List* in1_pk = _sw->my_pack(in1); 1898 Node_List* in2_pk = _sw->my_pack(in2); 1899 1900 if ( (in1_pk != NULL && in1_pk->size() != cmpd_pk->size()) 1901 || (in2_pk != NULL && in2_pk->size() != cmpd_pk->size()) ) { 1902 return false; 1903 } 1904 1905 // test if "all" in1 are in the same pack or the same node 1906 if (in1_pk == NULL) { 1907 for (uint j = 1; j < cmpd_pk->size(); j++) { 1908 if (cmpd_pk->at(j)->in(1) != in1) { 1909 return false; 1910 } 1911 }//for: in1_pk is not pack but all CmpD nodes in the pack have the same in(1) 1912 } 1913 // test if "all" in2 are in the same pack or the same node 1914 if (in2_pk == NULL) { 1915 for (uint j = 1; j < cmpd_pk->size(); j++) { 1916 if (cmpd_pk->at(j)->in(2) != in2) { 1917 return false; 1918 } 1919 }//for: in2_pk is not pack but all CmpD nodes in the pack have the same in(2) 1920 } 1921 //now check if cmpd_pk may be subsumed in vector built for cmovd_pk 1922 int cmovd_ind1, cmovd_ind2; 1923 if (cmpd_pk->at(0)->in(1) == cmovd_pk->at(0)->as_CMove()->in(CMoveNode::IfFalse) 1924 && cmpd_pk->at(0)->in(2) == cmovd_pk->at(0)->as_CMove()->in(CMoveNode::IfTrue)) { 1925 cmovd_ind1 = CMoveNode::IfFalse; 1926 cmovd_ind2 = CMoveNode::IfTrue; 1927 } else if (cmpd_pk->at(0)->in(2) == cmovd_pk->at(0)->as_CMove()->in(CMoveNode::IfFalse) 1928 && cmpd_pk->at(0)->in(1) == cmovd_pk->at(0)->as_CMove()->in(CMoveNode::IfTrue)) { 1929 cmovd_ind2 = CMoveNode::IfFalse; 1930 cmovd_ind1 = CMoveNode::IfTrue; 1931 } 1932 else { 1933 return false; 1934 } 1935 1936 for (uint j = 1; j < cmpd_pk->size(); j++) { 1937 if (cmpd_pk->at(j)->in(1) != cmovd_pk->at(j)->as_CMove()->in(cmovd_ind1) 1938 || cmpd_pk->at(j)->in(2) != cmovd_pk->at(j)->as_CMove()->in(cmovd_ind2)) { 1939 return false; 1940 }//if 1941 } 1942 NOT_PRODUCT(if(_sw->is_trace_cmov()) { tty->print("CMoveKit::test_cmpd_pack: cmpd pack for 1st CmpD %d is OK for vectorization: ", cmpd0->_idx); cmpd0->dump(); }) 1943 return true; 1944 } 1945 1946 //------------------------------implemented--------------------------- 1947 // Can code be generated for pack p? 1948 bool SuperWord::implemented(Node_List* p) { 1949 bool retValue = false; 1950 Node* p0 = p->at(0); 1951 if (p0 != NULL) { 1952 int opc = p0->Opcode(); 1953 uint size = p->size(); 1954 if (p0->is_reduction()) { 1955 const Type *arith_type = p0->bottom_type(); 1956 // Length 2 reductions of INT/LONG do not offer performance benefits 1957 if (((arith_type->basic_type() == T_INT) || (arith_type->basic_type() == T_LONG)) && (size == 2)) { 1958 retValue = false; 1959 } else { 1960 retValue = ReductionNode::implemented(opc, size, arith_type->basic_type()); 1961 } 1962 } else { 1963 retValue = VectorNode::implemented(opc, size, velt_basic_type(p0)); 1964 } 1965 if (!retValue) { 1966 if (is_cmov_pack(p)) { 1967 NOT_PRODUCT(if(is_trace_cmov()) {tty->print_cr("SWPointer::implemented: found cmpd pack"); print_pack(p);}) 1968 return true; 1969 } 1970 } 1971 } 1972 return retValue; 1973 } 1974 1975 bool SuperWord::is_cmov_pack(Node_List* p) { 1976 return _cmovev_kit.pack(p->at(0)) != NULL; 1977 } 1978 //------------------------------same_inputs-------------------------- 1979 // For pack p, are all idx operands the same? 1980 bool SuperWord::same_inputs(Node_List* p, int idx) { 1981 Node* p0 = p->at(0); 1982 uint vlen = p->size(); 1983 Node* p0_def = p0->in(idx); 1984 for (uint i = 1; i < vlen; i++) { 1985 Node* pi = p->at(i); 1986 Node* pi_def = pi->in(idx); 1987 if (p0_def != pi_def) { 1988 return false; 1989 } 1990 } 1991 return true; 1992 } 1993 1994 //------------------------------profitable--------------------------- 1995 // For pack p, are all operands and all uses (with in the block) vector? 1996 bool SuperWord::profitable(Node_List* p) { 1997 Node* p0 = p->at(0); 1998 uint start, end; 1999 VectorNode::vector_operands(p0, &start, &end); 2000 2001 // Return false if some inputs are not vectors or vectors with different 2002 // size or alignment. 2003 // Also, for now, return false if not scalar promotion case when inputs are 2004 // the same. Later, implement PackNode and allow differing, non-vector inputs 2005 // (maybe just the ones from outside the block.) 2006 for (uint i = start; i < end; i++) { 2007 if (!is_vector_use(p0, i)) { 2008 return false; 2009 } 2010 } 2011 // Check if reductions are connected 2012 if (p0->is_reduction()) { 2013 Node* second_in = p0->in(2); 2014 Node_List* second_pk = my_pack(second_in); 2015 if ((second_pk == NULL) || (_num_work_vecs == _num_reductions)) { 2016 // Remove reduction flag if no parent pack or if not enough work 2017 // to cover reduction expansion overhead 2018 p0->remove_flag(Node::Flag_is_reduction); 2019 return false; 2020 } else if (second_pk->size() != p->size()) { 2021 return false; 2022 } 2023 } 2024 if (VectorNode::is_shift(p0)) { 2025 // For now, return false if shift count is vector or not scalar promotion 2026 // case (different shift counts) because it is not supported yet. 2027 Node* cnt = p0->in(2); 2028 Node_List* cnt_pk = my_pack(cnt); 2029 if (cnt_pk != NULL) 2030 return false; 2031 if (!same_inputs(p, 2)) 2032 return false; 2033 } 2034 if (!p0->is_Store()) { 2035 // For now, return false if not all uses are vector. 2036 // Later, implement ExtractNode and allow non-vector uses (maybe 2037 // just the ones outside the block.) 2038 for (uint i = 0; i < p->size(); i++) { 2039 Node* def = p->at(i); 2040 if (is_cmov_pack_internal_node(p, def)) { 2041 continue; 2042 } 2043 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { 2044 Node* use = def->fast_out(j); 2045 for (uint k = 0; k < use->req(); k++) { 2046 Node* n = use->in(k); 2047 if (def == n) { 2048 // reductions should only have a Phi use at the the loop 2049 // head and out of loop uses 2050 if (def->is_reduction() && 2051 ((use->is_Phi() && use->in(0) == _lpt->_head) || 2052 !_lpt->is_member(_phase->get_loop(_phase->ctrl_or_self(use))))) { 2053 assert(i == p->size()-1, "must be last element of the pack"); 2054 continue; 2055 } 2056 if (!is_vector_use(use, k)) { 2057 return false; 2058 } 2059 } 2060 } 2061 } 2062 } 2063 } 2064 return true; 2065 } 2066 2067 //------------------------------schedule--------------------------- 2068 // Adjust the memory graph for the packed operations 2069 void SuperWord::schedule() { 2070 2071 // Co-locate in the memory graph the members of each memory pack 2072 for (int i = 0; i < _packset.length(); i++) { 2073 co_locate_pack(_packset.at(i)); 2074 } 2075 } 2076 2077 //-------------------------------remove_and_insert------------------- 2078 // Remove "current" from its current position in the memory graph and insert 2079 // it after the appropriate insertion point (lip or uip). 2080 void SuperWord::remove_and_insert(MemNode *current, MemNode *prev, MemNode *lip, 2081 Node *uip, Unique_Node_List &sched_before) { 2082 Node* my_mem = current->in(MemNode::Memory); 2083 bool sched_up = sched_before.member(current); 2084 2085 // remove current_store from its current position in the memmory graph 2086 for (DUIterator i = current->outs(); current->has_out(i); i++) { 2087 Node* use = current->out(i); 2088 if (use->is_Mem()) { 2089 assert(use->in(MemNode::Memory) == current, "must be"); 2090 if (use == prev) { // connect prev to my_mem 2091 _igvn.replace_input_of(use, MemNode::Memory, my_mem); 2092 --i; //deleted this edge; rescan position 2093 } else if (sched_before.member(use)) { 2094 if (!sched_up) { // Will be moved together with current 2095 _igvn.replace_input_of(use, MemNode::Memory, uip); 2096 --i; //deleted this edge; rescan position 2097 } 2098 } else { 2099 if (sched_up) { // Will be moved together with current 2100 _igvn.replace_input_of(use, MemNode::Memory, lip); 2101 --i; //deleted this edge; rescan position 2102 } 2103 } 2104 } 2105 } 2106 2107 Node *insert_pt = sched_up ? uip : lip; 2108 2109 // all uses of insert_pt's memory state should use current's instead 2110 for (DUIterator i = insert_pt->outs(); insert_pt->has_out(i); i++) { 2111 Node* use = insert_pt->out(i); 2112 if (use->is_Mem()) { 2113 assert(use->in(MemNode::Memory) == insert_pt, "must be"); 2114 _igvn.replace_input_of(use, MemNode::Memory, current); 2115 --i; //deleted this edge; rescan position 2116 } else if (!sched_up && use->is_Phi() && use->bottom_type() == Type::MEMORY) { 2117 uint pos; //lip (lower insert point) must be the last one in the memory slice 2118 for (pos=1; pos < use->req(); pos++) { 2119 if (use->in(pos) == insert_pt) break; 2120 } 2121 _igvn.replace_input_of(use, pos, current); 2122 --i; 2123 } 2124 } 2125 2126 //connect current to insert_pt 2127 _igvn.replace_input_of(current, MemNode::Memory, insert_pt); 2128 } 2129 2130 //------------------------------co_locate_pack---------------------------------- 2131 // To schedule a store pack, we need to move any sandwiched memory ops either before 2132 // or after the pack, based upon dependence information: 2133 // (1) If any store in the pack depends on the sandwiched memory op, the 2134 // sandwiched memory op must be scheduled BEFORE the pack; 2135 // (2) If a sandwiched memory op depends on any store in the pack, the 2136 // sandwiched memory op must be scheduled AFTER the pack; 2137 // (3) If a sandwiched memory op (say, memA) depends on another sandwiched 2138 // memory op (say memB), memB must be scheduled before memA. So, if memA is 2139 // scheduled before the pack, memB must also be scheduled before the pack; 2140 // (4) If there is no dependence restriction for a sandwiched memory op, we simply 2141 // schedule this store AFTER the pack 2142 // (5) We know there is no dependence cycle, so there in no other case; 2143 // (6) Finally, all memory ops in another single pack should be moved in the same direction. 2144 // 2145 // To schedule a load pack, we use the memory state of either the first or the last load in 2146 // the pack, based on the dependence constraint. 2147 void SuperWord::co_locate_pack(Node_List* pk) { 2148 if (pk->at(0)->is_Store()) { 2149 MemNode* first = executed_first(pk)->as_Mem(); 2150 MemNode* last = executed_last(pk)->as_Mem(); 2151 Unique_Node_List schedule_before_pack; 2152 Unique_Node_List memops; 2153 2154 MemNode* current = last->in(MemNode::Memory)->as_Mem(); 2155 MemNode* previous = last; 2156 while (true) { 2157 assert(in_bb(current), "stay in block"); 2158 memops.push(previous); 2159 for (DUIterator i = current->outs(); current->has_out(i); i++) { 2160 Node* use = current->out(i); 2161 if (use->is_Mem() && use != previous) 2162 memops.push(use); 2163 } 2164 if (current == first) break; 2165 previous = current; 2166 current = current->in(MemNode::Memory)->as_Mem(); 2167 } 2168 2169 // determine which memory operations should be scheduled before the pack 2170 for (uint i = 1; i < memops.size(); i++) { 2171 Node *s1 = memops.at(i); 2172 if (!in_pack(s1, pk) && !schedule_before_pack.member(s1)) { 2173 for (uint j = 0; j< i; j++) { 2174 Node *s2 = memops.at(j); 2175 if (!independent(s1, s2)) { 2176 if (in_pack(s2, pk) || schedule_before_pack.member(s2)) { 2177 schedule_before_pack.push(s1); // s1 must be scheduled before 2178 Node_List* mem_pk = my_pack(s1); 2179 if (mem_pk != NULL) { 2180 for (uint ii = 0; ii < mem_pk->size(); ii++) { 2181 Node* s = mem_pk->at(ii); // follow partner 2182 if (memops.member(s) && !schedule_before_pack.member(s)) 2183 schedule_before_pack.push(s); 2184 } 2185 } 2186 break; 2187 } 2188 } 2189 } 2190 } 2191 } 2192 2193 Node* upper_insert_pt = first->in(MemNode::Memory); 2194 // Following code moves loads connected to upper_insert_pt below aliased stores. 2195 // Collect such loads here and reconnect them back to upper_insert_pt later. 2196 memops.clear(); 2197 for (DUIterator i = upper_insert_pt->outs(); upper_insert_pt->has_out(i); i++) { 2198 Node* use = upper_insert_pt->out(i); 2199 if (use->is_Mem() && !use->is_Store()) { 2200 memops.push(use); 2201 } 2202 } 2203 2204 MemNode* lower_insert_pt = last; 2205 previous = last; //previous store in pk 2206 current = last->in(MemNode::Memory)->as_Mem(); 2207 2208 // start scheduling from "last" to "first" 2209 while (true) { 2210 assert(in_bb(current), "stay in block"); 2211 assert(in_pack(previous, pk), "previous stays in pack"); 2212 Node* my_mem = current->in(MemNode::Memory); 2213 2214 if (in_pack(current, pk)) { 2215 // Forward users of my memory state (except "previous) to my input memory state 2216 for (DUIterator i = current->outs(); current->has_out(i); i++) { 2217 Node* use = current->out(i); 2218 if (use->is_Mem() && use != previous) { 2219 assert(use->in(MemNode::Memory) == current, "must be"); 2220 if (schedule_before_pack.member(use)) { 2221 _igvn.replace_input_of(use, MemNode::Memory, upper_insert_pt); 2222 } else { 2223 _igvn.replace_input_of(use, MemNode::Memory, lower_insert_pt); 2224 } 2225 --i; // deleted this edge; rescan position 2226 } 2227 } 2228 previous = current; 2229 } else { // !in_pack(current, pk) ==> a sandwiched store 2230 remove_and_insert(current, previous, lower_insert_pt, upper_insert_pt, schedule_before_pack); 2231 } 2232 2233 if (current == first) break; 2234 current = my_mem->as_Mem(); 2235 } // end while 2236 2237 // Reconnect loads back to upper_insert_pt. 2238 for (uint i = 0; i < memops.size(); i++) { 2239 Node *ld = memops.at(i); 2240 if (ld->in(MemNode::Memory) != upper_insert_pt) { 2241 _igvn.replace_input_of(ld, MemNode::Memory, upper_insert_pt); 2242 } 2243 } 2244 } else if (pk->at(0)->is_Load()) { //load 2245 // all loads in the pack should have the same memory state. By default, 2246 // we use the memory state of the last load. However, if any load could 2247 // not be moved down due to the dependence constraint, we use the memory 2248 // state of the first load. 2249 Node* first_mem = pk->at(0)->in(MemNode::Memory); 2250 Node* last_mem = first_mem; 2251 for (uint i = 1; i < pk->size(); i++) { 2252 Node* ld = pk->at(i); 2253 Node* mem = ld->in(MemNode::Memory); 2254 assert(in_bb(first_mem) || in_bb(mem) || mem == first_mem, "2 different memory state from outside the loop?"); 2255 if (in_bb(mem)) { 2256 if (in_bb(first_mem) && bb_idx(mem) < bb_idx(first_mem)) { 2257 first_mem = mem; 2258 } 2259 if (!in_bb(last_mem) || bb_idx(mem) > bb_idx(last_mem)) { 2260 last_mem = mem; 2261 } 2262 } 2263 } 2264 bool schedule_last = true; 2265 for (uint i = 0; i < pk->size(); i++) { 2266 Node* ld = pk->at(i); 2267 for (Node* current = last_mem; current != ld->in(MemNode::Memory); 2268 current=current->in(MemNode::Memory)) { 2269 assert(current != first_mem, "corrupted memory graph"); 2270 if(current->is_Mem() && !independent(current, ld)){ 2271 schedule_last = false; // a later store depends on this load 2272 break; 2273 } 2274 } 2275 } 2276 2277 Node* mem_input = schedule_last ? last_mem : first_mem; 2278 _igvn.hash_delete(mem_input); 2279 // Give each load the same memory state 2280 for (uint i = 0; i < pk->size(); i++) { 2281 LoadNode* ld = pk->at(i)->as_Load(); 2282 _igvn.replace_input_of(ld, MemNode::Memory, mem_input); 2283 } 2284 } 2285 } 2286 2287 #ifndef PRODUCT 2288 void SuperWord::print_loop(bool whole) { 2289 Node_Stack stack(_arena, _phase->C->unique() >> 2); 2290 Node_List rpo_list; 2291 VectorSet visited(_arena); 2292 visited.set(lpt()->_head->_idx); 2293 _phase->rpo(lpt()->_head, stack, visited, rpo_list); 2294 _phase->dump(lpt(), rpo_list.size(), rpo_list ); 2295 if(whole) { 2296 tty->print_cr("\n Whole loop tree"); 2297 _phase->dump(); 2298 tty->print_cr(" End of whole loop tree\n"); 2299 } 2300 } 2301 #endif 2302 2303 //------------------------------output--------------------------- 2304 // Convert packs into vector node operations 2305 void SuperWord::output() { 2306 CountedLoopNode *cl = lpt()->_head->as_CountedLoop(); 2307 Compile* C = _phase->C; 2308 if (_packset.length() == 0) { 2309 if (cl->is_main_loop()) { 2310 // Instigate more unrolling for optimization when vectorization fails. 2311 C->set_major_progress(); 2312 cl->set_notpassed_slp(); 2313 cl->mark_do_unroll_only(); 2314 } 2315 return; 2316 } 2317 2318 #ifndef PRODUCT 2319 if (TraceLoopOpts) { 2320 tty->print("SuperWord::output "); 2321 lpt()->dump_head(); 2322 } 2323 #endif 2324 2325 if (cl->is_main_loop()) { 2326 // MUST ENSURE main loop's initial value is properly aligned: 2327 // (iv_initial_value + min_iv_offset) % vector_width_in_bytes() == 0 2328 2329 align_initial_loop_index(align_to_ref()); 2330 2331 // Insert extract (unpack) operations for scalar uses 2332 for (int i = 0; i < _packset.length(); i++) { 2333 insert_extracts(_packset.at(i)); 2334 } 2335 } 2336 2337 uint max_vlen_in_bytes = 0; 2338 uint max_vlen = 0; 2339 bool can_process_post_loop = (PostLoopMultiversioning && Matcher::has_predicated_vectors() && cl->is_post_loop()); 2340 2341 NOT_PRODUCT(if(is_trace_loop_reverse()) {tty->print_cr("SWPointer::output: print loop before create_reserve_version_of_loop"); print_loop(true);}) 2342 2343 CountedLoopReserveKit make_reversable(_phase, _lpt, do_reserve_copy()); 2344 2345 NOT_PRODUCT(if(is_trace_loop_reverse()) {tty->print_cr("SWPointer::output: print loop after create_reserve_version_of_loop"); print_loop(true);}) 2346 2347 if (do_reserve_copy() && !make_reversable.has_reserved()) { 2348 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: loop was not reserved correctly, exiting SuperWord");}) 2349 return; 2350 } 2351 2352 for (int i = 0; i < _block.length(); i++) { 2353 Node* n = _block.at(i); 2354 Node_List* p = my_pack(n); 2355 if (p && n == executed_last(p)) { 2356 uint vlen = p->size(); 2357 uint vlen_in_bytes = 0; 2358 Node* vn = NULL; 2359 Node* low_adr = p->at(0); 2360 Node* first = executed_first(p); 2361 if (can_process_post_loop) { 2362 // override vlen with the main loops vector length 2363 vlen = cl->slp_max_unroll(); 2364 } 2365 NOT_PRODUCT(if(is_trace_cmov()) {tty->print_cr("SWPointer::output: %d executed first, %d executed last in pack", first->_idx, n->_idx); print_pack(p);}) 2366 int opc = n->Opcode(); 2367 if (n->is_Load()) { 2368 Node* ctl = n->in(MemNode::Control); 2369 Node* mem = first->in(MemNode::Memory); 2370 SWPointer p1(n->as_Mem(), this, NULL, false); 2371 // Identify the memory dependency for the new loadVector node by 2372 // walking up through memory chain. 2373 // This is done to give flexibility to the new loadVector node so that 2374 // it can move above independent storeVector nodes. 2375 while (mem->is_StoreVector()) { 2376 SWPointer p2(mem->as_Mem(), this, NULL, false); 2377 int cmp = p1.cmp(p2); 2378 if (SWPointer::not_equal(cmp) || !SWPointer::comparable(cmp)) { 2379 mem = mem->in(MemNode::Memory); 2380 } else { 2381 break; // dependent memory 2382 } 2383 } 2384 Node* adr = low_adr->in(MemNode::Address); 2385 const TypePtr* atyp = n->adr_type(); 2386 vn = LoadVectorNode::make(opc, ctl, mem, adr, atyp, vlen, velt_basic_type(n), control_dependency(p)); 2387 vlen_in_bytes = vn->as_LoadVector()->memory_size(); 2388 } else if (n->is_Store()) { 2389 // Promote value to be stored to vector 2390 Node* val = vector_opd(p, MemNode::ValueIn); 2391 if (val == NULL) { 2392 if (do_reserve_copy()) { 2393 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: val should not be NULL, exiting SuperWord");}) 2394 return; //and reverse to backup IG 2395 } 2396 ShouldNotReachHere(); 2397 } 2398 2399 Node* ctl = n->in(MemNode::Control); 2400 Node* mem = first->in(MemNode::Memory); 2401 Node* adr = low_adr->in(MemNode::Address); 2402 const TypePtr* atyp = n->adr_type(); 2403 vn = StoreVectorNode::make(opc, ctl, mem, adr, atyp, val, vlen); 2404 vlen_in_bytes = vn->as_StoreVector()->memory_size(); 2405 } else if (VectorNode::is_muladds2i(n)) { 2406 assert(n->req() == 5u, "MulAddS2I should have 4 operands."); 2407 Node* in1 = vector_opd(p, 1); 2408 Node* in2 = vector_opd(p, 2); 2409 vn = VectorNode::make(opc, in1, in2, vlen, velt_basic_type(n)); 2410 vlen_in_bytes = vn->as_Vector()->length_in_bytes(); 2411 } else if (n->req() == 3 && !is_cmov_pack(p)) { 2412 // Promote operands to vector 2413 Node* in1 = NULL; 2414 bool node_isa_reduction = n->is_reduction(); 2415 if (node_isa_reduction) { 2416 // the input to the first reduction operation is retained 2417 in1 = low_adr->in(1); 2418 } else { 2419 in1 = vector_opd(p, 1); 2420 if (in1 == NULL) { 2421 if (do_reserve_copy()) { 2422 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: in1 should not be NULL, exiting SuperWord");}) 2423 return; //and reverse to backup IG 2424 } 2425 ShouldNotReachHere(); 2426 } 2427 } 2428 Node* in2 = vector_opd(p, 2); 2429 if (in2 == NULL) { 2430 if (do_reserve_copy()) { 2431 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: in2 should not be NULL, exiting SuperWord");}) 2432 return; //and reverse to backup IG 2433 } 2434 ShouldNotReachHere(); 2435 } 2436 if (VectorNode::is_invariant_vector(in1) && (node_isa_reduction == false) && (n->is_Add() || n->is_Mul())) { 2437 // Move invariant vector input into second position to avoid register spilling. 2438 Node* tmp = in1; 2439 in1 = in2; 2440 in2 = tmp; 2441 } 2442 if (node_isa_reduction) { 2443 const Type *arith_type = n->bottom_type(); 2444 vn = ReductionNode::make(opc, NULL, in1, in2, arith_type->basic_type()); 2445 if (in2->is_Load()) { 2446 vlen_in_bytes = in2->as_LoadVector()->memory_size(); 2447 } else { 2448 vlen_in_bytes = in2->as_Vector()->length_in_bytes(); 2449 } 2450 } else { 2451 vn = VectorNode::make(opc, in1, in2, vlen, velt_basic_type(n)); 2452 vlen_in_bytes = vn->as_Vector()->length_in_bytes(); 2453 } 2454 } else if (opc == Op_SqrtF || opc == Op_SqrtD || 2455 opc == Op_AbsF || opc == Op_AbsD || 2456 opc == Op_NegF || opc == Op_NegD || 2457 opc == Op_PopCountI) { 2458 assert(n->req() == 2, "only one input expected"); 2459 Node* in = vector_opd(p, 1); 2460 vn = VectorNode::make(opc, in, NULL, vlen, velt_basic_type(n)); 2461 vlen_in_bytes = vn->as_Vector()->length_in_bytes(); 2462 } else if (is_cmov_pack(p)) { 2463 if (can_process_post_loop) { 2464 // do not refactor of flow in post loop context 2465 return; 2466 } 2467 if (!n->is_CMove()) { 2468 continue; 2469 } 2470 // place here CMoveVDNode 2471 NOT_PRODUCT(if(is_trace_cmov()) {tty->print_cr("SWPointer::output: print before CMove vectorization"); print_loop(false);}) 2472 Node* bol = n->in(CMoveNode::Condition); 2473 if (!bol->is_Bool() && bol->Opcode() == Op_ExtractI && bol->req() > 1 ) { 2474 NOT_PRODUCT(if(is_trace_cmov()) {tty->print_cr("SWPointer::output: %d is not Bool node, trying its in(1) node %d", bol->_idx, bol->in(1)->_idx); bol->dump(); bol->in(1)->dump();}) 2475 bol = bol->in(1); //may be ExtractNode 2476 } 2477 2478 assert(bol->is_Bool(), "should be BoolNode - too late to bail out!"); 2479 if (!bol->is_Bool()) { 2480 if (do_reserve_copy()) { 2481 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: expected %d bool node, exiting SuperWord", bol->_idx); bol->dump();}) 2482 return; //and reverse to backup IG 2483 } 2484 ShouldNotReachHere(); 2485 } 2486 2487 int cond = (int)bol->as_Bool()->_test._test; 2488 Node* in_cc = _igvn.intcon(cond); 2489 NOT_PRODUCT(if(is_trace_cmov()) {tty->print("SWPointer::output: created intcon in_cc node %d", in_cc->_idx); in_cc->dump();}) 2490 Node* cc = bol->clone(); 2491 cc->set_req(1, in_cc); 2492 NOT_PRODUCT(if(is_trace_cmov()) {tty->print("SWPointer::output: created bool cc node %d", cc->_idx); cc->dump();}) 2493 2494 Node* src1 = vector_opd(p, 2); //2=CMoveNode::IfFalse 2495 if (src1 == NULL) { 2496 if (do_reserve_copy()) { 2497 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: src1 should not be NULL, exiting SuperWord");}) 2498 return; //and reverse to backup IG 2499 } 2500 ShouldNotReachHere(); 2501 } 2502 Node* src2 = vector_opd(p, 3); //3=CMoveNode::IfTrue 2503 if (src2 == NULL) { 2504 if (do_reserve_copy()) { 2505 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: src2 should not be NULL, exiting SuperWord");}) 2506 return; //and reverse to backup IG 2507 } 2508 ShouldNotReachHere(); 2509 } 2510 BasicType bt = velt_basic_type(n); 2511 const TypeVect* vt = TypeVect::make(bt, vlen); 2512 assert(bt == T_FLOAT || bt == T_DOUBLE, "Only vectorization for FP cmovs is supported"); 2513 if (bt == T_FLOAT) { 2514 vn = new CMoveVFNode(cc, src1, src2, vt); 2515 } else { 2516 assert(bt == T_DOUBLE, "Expected double"); 2517 vn = new CMoveVDNode(cc, src1, src2, vt); 2518 } 2519 NOT_PRODUCT(if(is_trace_cmov()) {tty->print("SWPointer::output: created new CMove node %d: ", vn->_idx); vn->dump();}) 2520 } else if (opc == Op_FmaD || opc == Op_FmaF) { 2521 // Promote operands to vector 2522 Node* in1 = vector_opd(p, 1); 2523 Node* in2 = vector_opd(p, 2); 2524 Node* in3 = vector_opd(p, 3); 2525 vn = VectorNode::make(opc, in1, in2, in3, vlen, velt_basic_type(n)); 2526 vlen_in_bytes = vn->as_Vector()->length_in_bytes(); 2527 } else { 2528 if (do_reserve_copy()) { 2529 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: ShouldNotReachHere, exiting SuperWord");}) 2530 return; //and reverse to backup IG 2531 } 2532 ShouldNotReachHere(); 2533 } 2534 2535 assert(vn != NULL, "sanity"); 2536 if (vn == NULL) { 2537 if (do_reserve_copy()){ 2538 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("SWPointer::output: got NULL node, cannot proceed, exiting SuperWord");}) 2539 return; //and reverse to backup IG 2540 } 2541 ShouldNotReachHere(); 2542 } 2543 2544 _block.at_put(i, vn); 2545 _igvn.register_new_node_with_optimizer(vn); 2546 _phase->set_ctrl(vn, _phase->get_ctrl(p->at(0))); 2547 for (uint j = 0; j < p->size(); j++) { 2548 Node* pm = p->at(j); 2549 _igvn.replace_node(pm, vn); 2550 } 2551 _igvn._worklist.push(vn); 2552 2553 if (can_process_post_loop) { 2554 // first check if the vector size if the maximum vector which we can use on the machine, 2555 // other vector size have reduced values for predicated data mapping. 2556 if (vlen_in_bytes != (uint)MaxVectorSize) { 2557 return; 2558 } 2559 } 2560 2561 if (vlen_in_bytes >= max_vlen_in_bytes && vlen > max_vlen) { 2562 max_vlen = vlen; 2563 max_vlen_in_bytes = vlen_in_bytes; 2564 } 2565 #ifdef ASSERT 2566 if (TraceNewVectors) { 2567 tty->print("new Vector node: "); 2568 vn->dump(); 2569 } 2570 #endif 2571 } 2572 }//for (int i = 0; i < _block.length(); i++) 2573 2574 if (max_vlen_in_bytes > C->max_vector_size()) { 2575 C->set_max_vector_size(max_vlen_in_bytes); 2576 } 2577 if (max_vlen_in_bytes > 0) { 2578 cl->mark_loop_vectorized(); 2579 } 2580 2581 if (SuperWordLoopUnrollAnalysis) { 2582 if (cl->has_passed_slp()) { 2583 uint slp_max_unroll_factor = cl->slp_max_unroll(); 2584 if (slp_max_unroll_factor == max_vlen) { 2585 if (TraceSuperWordLoopUnrollAnalysis) { 2586 tty->print_cr("vector loop(unroll=%d, len=%d)\n", max_vlen, max_vlen_in_bytes*BitsPerByte); 2587 } 2588 2589 // For atomic unrolled loops which are vector mapped, instigate more unrolling 2590 cl->set_notpassed_slp(); 2591 if (cl->is_main_loop()) { 2592 // if vector resources are limited, do not allow additional unrolling, also 2593 // do not unroll more on pure vector loops which were not reduced so that we can 2594 // program the post loop to single iteration execution. 2595 if (FLOATPRESSURE > 8) { 2596 C->set_major_progress(); 2597 cl->mark_do_unroll_only(); 2598 } 2599 } 2600 2601 if (do_reserve_copy()) { 2602 if (can_process_post_loop) { 2603 // Now create the difference of trip and limit and use it as our mask index. 2604 // Note: We limited the unroll of the vectorized loop so that 2605 // only vlen-1 size iterations can remain to be mask programmed. 2606 Node *incr = cl->incr(); 2607 SubINode *index = new SubINode(cl->limit(), cl->init_trip()); 2608 _igvn.register_new_node_with_optimizer(index); 2609 SetVectMaskINode *mask = new SetVectMaskINode(_phase->get_ctrl(cl->init_trip()), index); 2610 _igvn.register_new_node_with_optimizer(mask); 2611 // make this a single iteration loop 2612 AddINode *new_incr = new AddINode(incr->in(1), mask); 2613 _igvn.register_new_node_with_optimizer(new_incr); 2614 _phase->set_ctrl(new_incr, _phase->get_ctrl(incr)); 2615 _igvn.replace_node(incr, new_incr); 2616 cl->mark_is_multiversioned(); 2617 cl->loopexit()->add_flag(Node::Flag_has_vector_mask_set); 2618 } 2619 } 2620 } 2621 } 2622 } 2623 2624 if (do_reserve_copy()) { 2625 make_reversable.use_new(); 2626 } 2627 NOT_PRODUCT(if(is_trace_loop_reverse()) {tty->print_cr("\n Final loop after SuperWord"); print_loop(true);}) 2628 return; 2629 } 2630 2631 //------------------------------vector_opd--------------------------- 2632 // Create a vector operand for the nodes in pack p for operand: in(opd_idx) 2633 Node* SuperWord::vector_opd(Node_List* p, int opd_idx) { 2634 Node* p0 = p->at(0); 2635 uint vlen = p->size(); 2636 Node* opd = p0->in(opd_idx); 2637 CountedLoopNode *cl = lpt()->_head->as_CountedLoop(); 2638 2639 if (PostLoopMultiversioning && Matcher::has_predicated_vectors() && cl->is_post_loop()) { 2640 // override vlen with the main loops vector length 2641 vlen = cl->slp_max_unroll(); 2642 } 2643 2644 if (same_inputs(p, opd_idx)) { 2645 if (opd->is_Vector() || opd->is_LoadVector()) { 2646 assert(((opd_idx != 2) || !VectorNode::is_shift(p0)), "shift's count can't be vector"); 2647 if (opd_idx == 2 && VectorNode::is_shift(p0)) { 2648 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("shift's count can't be vector");}) 2649 return NULL; 2650 } 2651 return opd; // input is matching vector 2652 } 2653 if ((opd_idx == 2) && VectorNode::is_shift(p0)) { 2654 Compile* C = _phase->C; 2655 Node* cnt = opd; 2656 // Vector instructions do not mask shift count, do it here. 2657 juint mask = (p0->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); 2658 const TypeInt* t = opd->find_int_type(); 2659 if (t != NULL && t->is_con()) { 2660 juint shift = t->get_con(); 2661 if (shift > mask) { // Unsigned cmp 2662 cnt = ConNode::make(TypeInt::make(shift & mask)); 2663 } 2664 } else { 2665 if (t == NULL || t->_lo < 0 || t->_hi > (int)mask) { 2666 cnt = ConNode::make(TypeInt::make(mask)); 2667 _igvn.register_new_node_with_optimizer(cnt); 2668 cnt = new AndINode(opd, cnt); 2669 _igvn.register_new_node_with_optimizer(cnt); 2670 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); 2671 } 2672 assert(opd->bottom_type()->isa_int(), "int type only"); 2673 if (!opd->bottom_type()->isa_int()) { 2674 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("Should be int type only");}) 2675 return NULL; 2676 } 2677 // Move non constant shift count into vector register. 2678 cnt = VectorNode::shift_count(p0, cnt, vlen, velt_basic_type(p0)); 2679 } 2680 if (cnt != opd) { 2681 _igvn.register_new_node_with_optimizer(cnt); 2682 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); 2683 } 2684 return cnt; 2685 } 2686 assert(!opd->is_StoreVector(), "such vector is not expected here"); 2687 if (opd->is_StoreVector()) { 2688 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("StoreVector is not expected here");}) 2689 return NULL; 2690 } 2691 // Convert scalar input to vector with the same number of elements as 2692 // p0's vector. Use p0's type because size of operand's container in 2693 // vector should match p0's size regardless operand's size. 2694 const Type* p0_t = velt_type(p0); 2695 VectorNode* vn = VectorNode::scalar2vector(opd, vlen, p0_t); 2696 2697 _igvn.register_new_node_with_optimizer(vn); 2698 _phase->set_ctrl(vn, _phase->get_ctrl(opd)); 2699 #ifdef ASSERT 2700 if (TraceNewVectors) { 2701 tty->print("new Vector node: "); 2702 vn->dump(); 2703 } 2704 #endif 2705 return vn; 2706 } 2707 2708 // Insert pack operation 2709 BasicType bt = velt_basic_type(p0); 2710 PackNode* pk = PackNode::make(opd, vlen, bt); 2711 DEBUG_ONLY( const BasicType opd_bt = opd->bottom_type()->basic_type(); ) 2712 2713 for (uint i = 1; i < vlen; i++) { 2714 Node* pi = p->at(i); 2715 Node* in = pi->in(opd_idx); 2716 assert(my_pack(in) == NULL, "Should already have been unpacked"); 2717 if (my_pack(in) != NULL) { 2718 NOT_PRODUCT(if(is_trace_loop_reverse() || TraceLoopOpts) {tty->print_cr("Should already have been unpacked");}) 2719 return NULL; 2720 } 2721 assert(opd_bt == in->bottom_type()->basic_type(), "all same type"); 2722 pk->add_opd(in); 2723 if (VectorNode::is_muladds2i(pi)) { 2724 Node* in2 = pi->in(opd_idx + 2); 2725 assert(my_pack(in2) == NULL, "Should already have been unpacked"); 2726 if (my_pack(in2) != NULL) { 2727 NOT_PRODUCT(if (is_trace_loop_reverse() || TraceLoopOpts) { tty->print_cr("Should already have been unpacked"); }) 2728 return NULL; 2729 } 2730 assert(opd_bt == in2->bottom_type()->basic_type(), "all same type"); 2731 pk->add_opd(in2); 2732 } 2733 } 2734 _igvn.register_new_node_with_optimizer(pk); 2735 _phase->set_ctrl(pk, _phase->get_ctrl(opd)); 2736 #ifdef ASSERT 2737 if (TraceNewVectors) { 2738 tty->print("new Vector node: "); 2739 pk->dump(); 2740 } 2741 #endif 2742 return pk; 2743 } 2744 2745 //------------------------------insert_extracts--------------------------- 2746 // If a use of pack p is not a vector use, then replace the 2747 // use with an extract operation. 2748 void SuperWord::insert_extracts(Node_List* p) { 2749 if (p->at(0)->is_Store()) return; 2750 assert(_n_idx_list.is_empty(), "empty (node,index) list"); 2751 2752 // Inspect each use of each pack member. For each use that is 2753 // not a vector use, replace the use with an extract operation. 2754 2755 for (uint i = 0; i < p->size(); i++) { 2756 Node* def = p->at(i); 2757 for (DUIterator_Fast jmax, j = def->fast_outs(jmax); j < jmax; j++) { 2758 Node* use = def->fast_out(j); 2759 for (uint k = 0; k < use->req(); k++) { 2760 Node* n = use->in(k); 2761 if (def == n) { 2762 Node_List* u_pk = my_pack(use); 2763 if ((u_pk == NULL || !is_cmov_pack(u_pk) || use->is_CMove()) && !is_vector_use(use, k)) { 2764 _n_idx_list.push(use, k); 2765 } 2766 } 2767 } 2768 } 2769 } 2770 2771 while (_n_idx_list.is_nonempty()) { 2772 Node* use = _n_idx_list.node(); 2773 int idx = _n_idx_list.index(); 2774 _n_idx_list.pop(); 2775 Node* def = use->in(idx); 2776 2777 if (def->is_reduction()) continue; 2778 2779 // Insert extract operation 2780 _igvn.hash_delete(def); 2781 int def_pos = alignment(def) / data_size(def); 2782 2783 Node* ex = ExtractNode::make(def, def_pos, velt_basic_type(def)); 2784 _igvn.register_new_node_with_optimizer(ex); 2785 _phase->set_ctrl(ex, _phase->get_ctrl(def)); 2786 _igvn.replace_input_of(use, idx, ex); 2787 _igvn._worklist.push(def); 2788 2789 bb_insert_after(ex, bb_idx(def)); 2790 set_velt_type(ex, velt_type(def)); 2791 } 2792 } 2793 2794 //------------------------------is_vector_use--------------------------- 2795 // Is use->in(u_idx) a vector use? 2796 bool SuperWord::is_vector_use(Node* use, int u_idx) { 2797 Node_List* u_pk = my_pack(use); 2798 if (u_pk == NULL) return false; 2799 if (use->is_reduction()) return true; 2800 Node* def = use->in(u_idx); 2801 Node_List* d_pk = my_pack(def); 2802 if (d_pk == NULL) { 2803 // check for scalar promotion 2804 Node* n = u_pk->at(0)->in(u_idx); 2805 for (uint i = 1; i < u_pk->size(); i++) { 2806 if (u_pk->at(i)->in(u_idx) != n) return false; 2807 } 2808 return true; 2809 } 2810 if (VectorNode::is_muladds2i(use)) { 2811 // MulAddS2I takes shorts and produces ints - hence the special checks 2812 // on alignment and size. 2813 if (u_pk->size() * 2 != d_pk->size()) { 2814 return false; 2815 } 2816 for (uint i = 0; i < MIN2(d_pk->size(), u_pk->size()); i++) { 2817 Node* ui = u_pk->at(i); 2818 Node* di = d_pk->at(i); 2819 if (alignment(ui) != alignment(di) * 2) { 2820 return false; 2821 } 2822 } 2823 return true; 2824 } 2825 if (u_pk->size() != d_pk->size()) 2826 return false; 2827 for (uint i = 0; i < u_pk->size(); i++) { 2828 Node* ui = u_pk->at(i); 2829 Node* di = d_pk->at(i); 2830 if (ui->in(u_idx) != di || alignment(ui) != alignment(di)) 2831 return false; 2832 } 2833 return true; 2834 } 2835 2836 //------------------------------construct_bb--------------------------- 2837 // Construct reverse postorder list of block members 2838 bool SuperWord::construct_bb() { 2839 Node* entry = bb(); 2840 2841 assert(_stk.length() == 0, "stk is empty"); 2842 assert(_block.length() == 0, "block is empty"); 2843 assert(_data_entry.length() == 0, "data_entry is empty"); 2844 assert(_mem_slice_head.length() == 0, "mem_slice_head is empty"); 2845 assert(_mem_slice_tail.length() == 0, "mem_slice_tail is empty"); 2846 2847 // Find non-control nodes with no inputs from within block, 2848 // create a temporary map from node _idx to bb_idx for use 2849 // by the visited and post_visited sets, 2850 // and count number of nodes in block. 2851 int bb_ct = 0; 2852 for (uint i = 0; i < lpt()->_body.size(); i++) { 2853 Node *n = lpt()->_body.at(i); 2854 set_bb_idx(n, i); // Create a temporary map 2855 if (in_bb(n)) { 2856 if (n->is_LoadStore() || n->is_MergeMem() || 2857 (n->is_Proj() && !n->as_Proj()->is_CFG())) { 2858 // Bailout if the loop has LoadStore, MergeMem or data Proj 2859 // nodes. Superword optimization does not work with them. 2860 return false; 2861 } 2862 bb_ct++; 2863 if (!n->is_CFG()) { 2864 bool found = false; 2865 for (uint j = 0; j < n->req(); j++) { 2866 Node* def = n->in(j); 2867 if (def && in_bb(def)) { 2868 found = true; 2869 break; 2870 } 2871 } 2872 if (!found) { 2873 assert(n != entry, "can't be entry"); 2874 _data_entry.push(n); 2875 } 2876 } 2877 } 2878 } 2879 2880 // Find memory slices (head and tail) 2881 for (DUIterator_Fast imax, i = lp()->fast_outs(imax); i < imax; i++) { 2882 Node *n = lp()->fast_out(i); 2883 if (in_bb(n) && (n->is_Phi() && n->bottom_type() == Type::MEMORY)) { 2884 Node* n_tail = n->in(LoopNode::LoopBackControl); 2885 if (n_tail != n->in(LoopNode::EntryControl)) { 2886 if (!n_tail->is_Mem()) { 2887 assert(n_tail->is_Mem(), "unexpected node for memory slice: %s", n_tail->Name()); 2888 return false; // Bailout 2889 } 2890 _mem_slice_head.push(n); 2891 _mem_slice_tail.push(n_tail); 2892 } 2893 } 2894 } 2895 2896 // Create an RPO list of nodes in block 2897 2898 visited_clear(); 2899 post_visited_clear(); 2900 2901 // Push all non-control nodes with no inputs from within block, then control entry 2902 for (int j = 0; j < _data_entry.length(); j++) { 2903 Node* n = _data_entry.at(j); 2904 visited_set(n); 2905 _stk.push(n); 2906 } 2907 visited_set(entry); 2908 _stk.push(entry); 2909 2910 // Do a depth first walk over out edges 2911 int rpo_idx = bb_ct - 1; 2912 int size; 2913 int reduction_uses = 0; 2914 while ((size = _stk.length()) > 0) { 2915 Node* n = _stk.top(); // Leave node on stack 2916 if (!visited_test_set(n)) { 2917 // forward arc in graph 2918 } else if (!post_visited_test(n)) { 2919 // cross or back arc 2920 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { 2921 Node *use = n->fast_out(i); 2922 if (in_bb(use) && !visited_test(use) && 2923 // Don't go around backedge 2924 (!use->is_Phi() || n == entry)) { 2925 if (use->is_reduction()) { 2926 // First see if we can map the reduction on the given system we are on, then 2927 // make a data entry operation for each reduction we see. 2928 BasicType bt = use->bottom_type()->basic_type(); 2929 if (ReductionNode::implemented(use->Opcode(), Matcher::min_vector_size(bt), bt)) { 2930 reduction_uses++; 2931 } 2932 } 2933 _stk.push(use); 2934 } 2935 } 2936 if (_stk.length() == size) { 2937 // There were no additional uses, post visit node now 2938 _stk.pop(); // Remove node from stack 2939 assert(rpo_idx >= 0, ""); 2940 _block.at_put_grow(rpo_idx, n); 2941 rpo_idx--; 2942 post_visited_set(n); 2943 assert(rpo_idx >= 0 || _stk.is_empty(), ""); 2944 } 2945 } else { 2946 _stk.pop(); // Remove post-visited node from stack 2947 } 2948 }//while 2949 2950 int ii_current = -1; 2951 unsigned int load_idx = (unsigned int)-1; 2952 _ii_order.clear(); 2953 // Create real map of block indices for nodes 2954 for (int j = 0; j < _block.length(); j++) { 2955 Node* n = _block.at(j); 2956 set_bb_idx(n, j); 2957 if (_do_vector_loop && n->is_Load()) { 2958 if (ii_current == -1) { 2959 ii_current = _clone_map.gen(n->_idx); 2960 _ii_order.push(ii_current); 2961 load_idx = _clone_map.idx(n->_idx); 2962 } else if (_clone_map.idx(n->_idx) == load_idx && _clone_map.gen(n->_idx) != ii_current) { 2963 ii_current = _clone_map.gen(n->_idx); 2964 _ii_order.push(ii_current); 2965 } 2966 } 2967 }//for 2968 2969 // Ensure extra info is allocated. 2970 initialize_bb(); 2971 2972 #ifndef PRODUCT 2973 if (_vector_loop_debug && _ii_order.length() > 0) { 2974 tty->print("SuperWord::construct_bb: List of generations: "); 2975 for (int jj = 0; jj < _ii_order.length(); ++jj) { 2976 tty->print(" %d:%d", jj, _ii_order.at(jj)); 2977 } 2978 tty->print_cr(" "); 2979 } 2980 if (TraceSuperWord) { 2981 print_bb(); 2982 tty->print_cr("\ndata entry nodes: %s", _data_entry.length() > 0 ? "" : "NONE"); 2983 for (int m = 0; m < _data_entry.length(); m++) { 2984 tty->print("%3d ", m); 2985 _data_entry.at(m)->dump(); 2986 } 2987 tty->print_cr("\nmemory slices: %s", _mem_slice_head.length() > 0 ? "" : "NONE"); 2988 for (int m = 0; m < _mem_slice_head.length(); m++) { 2989 tty->print("%3d ", m); _mem_slice_head.at(m)->dump(); 2990 tty->print(" "); _mem_slice_tail.at(m)->dump(); 2991 } 2992 } 2993 #endif 2994 assert(rpo_idx == -1 && bb_ct == _block.length(), "all block members found"); 2995 return (_mem_slice_head.length() > 0) || (reduction_uses > 0) || (_data_entry.length() > 0); 2996 } 2997 2998 //------------------------------initialize_bb--------------------------- 2999 // Initialize per node info 3000 void SuperWord::initialize_bb() { 3001 Node* last = _block.at(_block.length() - 1); 3002 grow_node_info(bb_idx(last)); 3003 } 3004 3005 //------------------------------bb_insert_after--------------------------- 3006 // Insert n into block after pos 3007 void SuperWord::bb_insert_after(Node* n, int pos) { 3008 int n_pos = pos + 1; 3009 // Make room 3010 for (int i = _block.length() - 1; i >= n_pos; i--) { 3011 _block.at_put_grow(i+1, _block.at(i)); 3012 } 3013 for (int j = _node_info.length() - 1; j >= n_pos; j--) { 3014 _node_info.at_put_grow(j+1, _node_info.at(j)); 3015 } 3016 // Set value 3017 _block.at_put_grow(n_pos, n); 3018 _node_info.at_put_grow(n_pos, SWNodeInfo::initial); 3019 // Adjust map from node->_idx to _block index 3020 for (int i = n_pos; i < _block.length(); i++) { 3021 set_bb_idx(_block.at(i), i); 3022 } 3023 } 3024 3025 //------------------------------compute_max_depth--------------------------- 3026 // Compute max depth for expressions from beginning of block 3027 // Use to prune search paths during test for independence. 3028 void SuperWord::compute_max_depth() { 3029 int ct = 0; 3030 bool again; 3031 do { 3032 again = false; 3033 for (int i = 0; i < _block.length(); i++) { 3034 Node* n = _block.at(i); 3035 if (!n->is_Phi()) { 3036 int d_orig = depth(n); 3037 int d_in = 0; 3038 for (DepPreds preds(n, _dg); !preds.done(); preds.next()) { 3039 Node* pred = preds.current(); 3040 if (in_bb(pred)) { 3041 d_in = MAX2(d_in, depth(pred)); 3042 } 3043 } 3044 if (d_in + 1 != d_orig) { 3045 set_depth(n, d_in + 1); 3046 again = true; 3047 } 3048 } 3049 } 3050 ct++; 3051 } while (again); 3052 3053 if (TraceSuperWord && Verbose) { 3054 tty->print_cr("compute_max_depth iterated: %d times", ct); 3055 } 3056 } 3057 3058 //-------------------------compute_vector_element_type----------------------- 3059 // Compute necessary vector element type for expressions 3060 // This propagates backwards a narrower integer type when the 3061 // upper bits of the value are not needed. 3062 // Example: char a,b,c; a = b + c; 3063 // Normally the type of the add is integer, but for packed character 3064 // operations the type of the add needs to be char. 3065 void SuperWord::compute_vector_element_type() { 3066 if (TraceSuperWord && Verbose) { 3067 tty->print_cr("\ncompute_velt_type:"); 3068 } 3069 3070 // Initial type 3071 for (int i = 0; i < _block.length(); i++) { 3072 Node* n = _block.at(i); 3073 set_velt_type(n, container_type(n)); 3074 } 3075 3076 // Propagate integer narrowed type backwards through operations 3077 // that don't depend on higher order bits 3078 for (int i = _block.length() - 1; i >= 0; i--) { 3079 Node* n = _block.at(i); 3080 // Only integer types need be examined 3081 const Type* vtn = velt_type(n); 3082 if (vtn->basic_type() == T_INT) { 3083 uint start, end; 3084 VectorNode::vector_operands(n, &start, &end); 3085 3086 for (uint j = start; j < end; j++) { 3087 Node* in = n->in(j); 3088 // Don't propagate through a memory 3089 if (!in->is_Mem() && in_bb(in) && velt_type(in)->basic_type() == T_INT && 3090 data_size(n) < data_size(in)) { 3091 bool same_type = true; 3092 for (DUIterator_Fast kmax, k = in->fast_outs(kmax); k < kmax; k++) { 3093 Node *use = in->fast_out(k); 3094 if (!in_bb(use) || !same_velt_type(use, n)) { 3095 same_type = false; 3096 break; 3097 } 3098 } 3099 if (same_type) { 3100 // For right shifts of small integer types (bool, byte, char, short) 3101 // we need precise information about sign-ness. Only Load nodes have 3102 // this information because Store nodes are the same for signed and 3103 // unsigned values. And any arithmetic operation after a load may 3104 // expand a value to signed Int so such right shifts can't be used 3105 // because vector elements do not have upper bits of Int. 3106 const Type* vt = vtn; 3107 if (VectorNode::is_shift(in)) { 3108 Node* load = in->in(1); 3109 if (load->is_Load() && in_bb(load) && (velt_type(load)->basic_type() == T_INT)) { 3110 vt = velt_type(load); 3111 } else if (in->Opcode() != Op_LShiftI) { 3112 // Widen type to Int to avoid creation of right shift vector 3113 // (align + data_size(s1) check in stmts_can_pack() will fail). 3114 // Note, left shifts work regardless type. 3115 vt = TypeInt::INT; 3116 } 3117 } 3118 set_velt_type(in, vt); 3119 } 3120 } 3121 } 3122 } 3123 } 3124 #ifndef PRODUCT 3125 if (TraceSuperWord && Verbose) { 3126 for (int i = 0; i < _block.length(); i++) { 3127 Node* n = _block.at(i); 3128 velt_type(n)->dump(); 3129 tty->print("\t"); 3130 n->dump(); 3131 } 3132 } 3133 #endif 3134 } 3135 3136 //------------------------------memory_alignment--------------------------- 3137 // Alignment within a vector memory reference 3138 int SuperWord::memory_alignment(MemNode* s, int iv_adjust) { 3139 #ifndef PRODUCT 3140 if(TraceSuperWord && Verbose) { 3141 tty->print("SuperWord::memory_alignment within a vector memory reference for %d: ", s->_idx); s->dump(); 3142 } 3143 #endif 3144 NOT_PRODUCT(SWPointer::Tracer::Depth ddd(0);) 3145 SWPointer p(s, this, NULL, false); 3146 if (!p.valid()) { 3147 NOT_PRODUCT(if(is_trace_alignment()) tty->print("SWPointer::memory_alignment: SWPointer p invalid, return bottom_align");) 3148 return bottom_align; 3149 } 3150 int vw = get_vw_bytes_special(s); 3151 if (vw < 2) { 3152 NOT_PRODUCT(if(is_trace_alignment()) tty->print_cr("SWPointer::memory_alignment: vector_width_in_bytes < 2, return bottom_align");) 3153 return bottom_align; // No vectors for this type 3154 } 3155 int offset = p.offset_in_bytes(); 3156 offset += iv_adjust*p.memory_size(); 3157 int off_rem = offset % vw; 3158 int off_mod = off_rem >= 0 ? off_rem : off_rem + vw; 3159 if (TraceSuperWord && Verbose) { 3160 tty->print_cr("SWPointer::memory_alignment: off_rem = %d, off_mod = %d", off_rem, off_mod); 3161 } 3162 return off_mod; 3163 } 3164 3165 //---------------------------container_type--------------------------- 3166 // Smallest type containing range of values 3167 const Type* SuperWord::container_type(Node* n) { 3168 if (n->is_Mem()) { 3169 BasicType bt = n->as_Mem()->memory_type(); 3170 if (n->is_Store() && (bt == T_CHAR)) { 3171 // Use T_SHORT type instead of T_CHAR for stored values because any 3172 // preceding arithmetic operation extends values to signed Int. 3173 bt = T_SHORT; 3174 } 3175 if (n->Opcode() == Op_LoadUB) { 3176 // Adjust type for unsigned byte loads, it is important for right shifts. 3177 // T_BOOLEAN is used because there is no basic type representing type 3178 // TypeInt::UBYTE. Use of T_BOOLEAN for vectors is fine because only 3179 // size (one byte) and sign is important. 3180 bt = T_BOOLEAN; 3181 } 3182 return Type::get_const_basic_type(bt); 3183 } 3184 const Type* t = _igvn.type(n); 3185 if (t->basic_type() == T_INT) { 3186 // A narrow type of arithmetic operations will be determined by 3187 // propagating the type of memory operations. 3188 return TypeInt::INT; 3189 } 3190 return t; 3191 } 3192 3193 bool SuperWord::same_velt_type(Node* n1, Node* n2) { 3194 const Type* vt1 = velt_type(n1); 3195 const Type* vt2 = velt_type(n2); 3196 if (vt1->basic_type() == T_INT && vt2->basic_type() == T_INT) { 3197 // Compare vectors element sizes for integer types. 3198 return data_size(n1) == data_size(n2); 3199 } 3200 return vt1 == vt2; 3201 } 3202 3203 //------------------------------in_packset--------------------------- 3204 // Are s1 and s2 in a pack pair and ordered as s1,s2? 3205 bool SuperWord::in_packset(Node* s1, Node* s2) { 3206 for (int i = 0; i < _packset.length(); i++) { 3207 Node_List* p = _packset.at(i); 3208 assert(p->size() == 2, "must be"); 3209 if (p->at(0) == s1 && p->at(p->size()-1) == s2) { 3210 return true; 3211 } 3212 } 3213 return false; 3214 } 3215 3216 //------------------------------in_pack--------------------------- 3217 // Is s in pack p? 3218 Node_List* SuperWord::in_pack(Node* s, Node_List* p) { 3219 for (uint i = 0; i < p->size(); i++) { 3220 if (p->at(i) == s) { 3221 return p; 3222 } 3223 } 3224 return NULL; 3225 } 3226 3227 //------------------------------remove_pack_at--------------------------- 3228 // Remove the pack at position pos in the packset 3229 void SuperWord::remove_pack_at(int pos) { 3230 Node_List* p = _packset.at(pos); 3231 for (uint i = 0; i < p->size(); i++) { 3232 Node* s = p->at(i); 3233 set_my_pack(s, NULL); 3234 } 3235 _packset.remove_at(pos); 3236 } 3237 3238 void SuperWord::packset_sort(int n) { 3239 // simple bubble sort so that we capitalize with O(n) when its already sorted 3240 while (n != 0) { 3241 bool swapped = false; 3242 for (int i = 1; i < n; i++) { 3243 Node_List* q_low = _packset.at(i-1); 3244 Node_List* q_i = _packset.at(i); 3245 3246 // only swap when we find something to swap 3247 if (alignment(q_low->at(0)) > alignment(q_i->at(0))) { 3248 Node_List* t = q_i; 3249 *(_packset.adr_at(i)) = q_low; 3250 *(_packset.adr_at(i-1)) = q_i; 3251 swapped = true; 3252 } 3253 } 3254 if (swapped == false) break; 3255 n--; 3256 } 3257 } 3258 3259 //------------------------------executed_first--------------------------- 3260 // Return the node executed first in pack p. Uses the RPO block list 3261 // to determine order. 3262 Node* SuperWord::executed_first(Node_List* p) { 3263 Node* n = p->at(0); 3264 int n_rpo = bb_idx(n); 3265 for (uint i = 1; i < p->size(); i++) { 3266 Node* s = p->at(i); 3267 int s_rpo = bb_idx(s); 3268 if (s_rpo < n_rpo) { 3269 n = s; 3270 n_rpo = s_rpo; 3271 } 3272 } 3273 return n; 3274 } 3275 3276 //------------------------------executed_last--------------------------- 3277 // Return the node executed last in pack p. 3278 Node* SuperWord::executed_last(Node_List* p) { 3279 Node* n = p->at(0); 3280 int n_rpo = bb_idx(n); 3281 for (uint i = 1; i < p->size(); i++) { 3282 Node* s = p->at(i); 3283 int s_rpo = bb_idx(s); 3284 if (s_rpo > n_rpo) { 3285 n = s; 3286 n_rpo = s_rpo; 3287 } 3288 } 3289 return n; 3290 } 3291 3292 LoadNode::ControlDependency SuperWord::control_dependency(Node_List* p) { 3293 LoadNode::ControlDependency dep = LoadNode::DependsOnlyOnTest; 3294 for (uint i = 0; i < p->size(); i++) { 3295 Node* n = p->at(i); 3296 assert(n->is_Load(), "only meaningful for loads"); 3297 if (!n->depends_only_on_test()) { 3298 dep = LoadNode::Pinned; 3299 } 3300 } 3301 return dep; 3302 } 3303 3304 3305 //----------------------------align_initial_loop_index--------------------------- 3306 // Adjust pre-loop limit so that in main loop, a load/store reference 3307 // to align_to_ref will be a position zero in the vector. 3308 // (iv + k) mod vector_align == 0 3309 void SuperWord::align_initial_loop_index(MemNode* align_to_ref) { 3310 CountedLoopNode *main_head = lp()->as_CountedLoop(); 3311 assert(main_head->is_main_loop(), ""); 3312 CountedLoopEndNode* pre_end = get_pre_loop_end(main_head); 3313 assert(pre_end != NULL, "we must have a correct pre-loop"); 3314 Node *pre_opaq1 = pre_end->limit(); 3315 assert(pre_opaq1->Opcode() == Op_Opaque1, ""); 3316 Opaque1Node *pre_opaq = (Opaque1Node*)pre_opaq1; 3317 Node *lim0 = pre_opaq->in(1); 3318 3319 // Where we put new limit calculations 3320 Node *pre_ctrl = pre_end->loopnode()->in(LoopNode::EntryControl); 3321 3322 // Ensure the original loop limit is available from the 3323 // pre-loop Opaque1 node. 3324 Node *orig_limit = pre_opaq->original_loop_limit(); 3325 assert(orig_limit != NULL && _igvn.type(orig_limit) != Type::TOP, ""); 3326 3327 SWPointer align_to_ref_p(align_to_ref, this, NULL, false); 3328 assert(align_to_ref_p.valid(), "sanity"); 3329 3330 // Given: 3331 // lim0 == original pre loop limit 3332 // V == v_align (power of 2) 3333 // invar == extra invariant piece of the address expression 3334 // e == offset [ +/- invar ] 3335 // 3336 // When reassociating expressions involving '%' the basic rules are: 3337 // (a - b) % k == 0 => a % k == b % k 3338 // and: 3339 // (a + b) % k == 0 => a % k == (k - b) % k 3340 // 3341 // For stride > 0 && scale > 0, 3342 // Derive the new pre-loop limit "lim" such that the two constraints: 3343 // (1) lim = lim0 + N (where N is some positive integer < V) 3344 // (2) (e + lim) % V == 0 3345 // are true. 3346 // 3347 // Substituting (1) into (2), 3348 // (e + lim0 + N) % V == 0 3349 // solve for N: 3350 // N = (V - (e + lim0)) % V 3351 // substitute back into (1), so that new limit 3352 // lim = lim0 + (V - (e + lim0)) % V 3353 // 3354 // For stride > 0 && scale < 0 3355 // Constraints: 3356 // lim = lim0 + N 3357 // (e - lim) % V == 0 3358 // Solving for lim: 3359 // (e - lim0 - N) % V == 0 3360 // N = (e - lim0) % V 3361 // lim = lim0 + (e - lim0) % V 3362 // 3363 // For stride < 0 && scale > 0 3364 // Constraints: 3365 // lim = lim0 - N 3366 // (e + lim) % V == 0 3367 // Solving for lim: 3368 // (e + lim0 - N) % V == 0 3369 // N = (e + lim0) % V 3370 // lim = lim0 - (e + lim0) % V 3371 // 3372 // For stride < 0 && scale < 0 3373 // Constraints: 3374 // lim = lim0 - N 3375 // (e - lim) % V == 0 3376 // Solving for lim: 3377 // (e - lim0 + N) % V == 0 3378 // N = (V - (e - lim0)) % V 3379 // lim = lim0 - (V - (e - lim0)) % V 3380 3381 int vw = vector_width_in_bytes(align_to_ref); 3382 int stride = iv_stride(); 3383 int scale = align_to_ref_p.scale_in_bytes(); 3384 int elt_size = align_to_ref_p.memory_size(); 3385 int v_align = vw / elt_size; 3386 assert(v_align > 1, "sanity"); 3387 int offset = align_to_ref_p.offset_in_bytes() / elt_size; 3388 Node *offsn = _igvn.intcon(offset); 3389 3390 Node *e = offsn; 3391 if (align_to_ref_p.invar() != NULL) { 3392 // incorporate any extra invariant piece producing (offset +/- invar) >>> log2(elt) 3393 Node* log2_elt = _igvn.intcon(exact_log2(elt_size)); 3394 Node* invar = align_to_ref_p.invar(); 3395 if (_igvn.type(invar)->isa_long()) { 3396 // Computations are done % (vector width/element size) so it's 3397 // safe to simply convert invar to an int and loose the upper 32 3398 // bit half. 3399 invar = new ConvL2INode(invar); 3400 _igvn.register_new_node_with_optimizer(invar); 3401 } 3402 Node* aref = new URShiftINode(invar, log2_elt); 3403 _igvn.register_new_node_with_optimizer(aref); 3404 _phase->set_ctrl(aref, pre_ctrl); 3405 if (align_to_ref_p.negate_invar()) { 3406 e = new SubINode(e, aref); 3407 } else { 3408 e = new AddINode(e, aref); 3409 } 3410 _igvn.register_new_node_with_optimizer(e); 3411 _phase->set_ctrl(e, pre_ctrl); 3412 } 3413 if (vw > ObjectAlignmentInBytes || align_to_ref_p.base()->is_top()) { 3414 // incorporate base e +/- base && Mask >>> log2(elt) 3415 Node* xbase = new CastP2XNode(NULL, align_to_ref_p.adr()); 3416 _igvn.register_new_node_with_optimizer(xbase); 3417 #ifdef _LP64 3418 xbase = new ConvL2INode(xbase); 3419 _igvn.register_new_node_with_optimizer(xbase); 3420 #endif 3421 Node* mask = _igvn.intcon(vw-1); 3422 Node* masked_xbase = new AndINode(xbase, mask); 3423 _igvn.register_new_node_with_optimizer(masked_xbase); 3424 Node* log2_elt = _igvn.intcon(exact_log2(elt_size)); 3425 Node* bref = new URShiftINode(masked_xbase, log2_elt); 3426 _igvn.register_new_node_with_optimizer(bref); 3427 _phase->set_ctrl(bref, pre_ctrl); 3428 e = new AddINode(e, bref); 3429 _igvn.register_new_node_with_optimizer(e); 3430 _phase->set_ctrl(e, pre_ctrl); 3431 } 3432 3433 // compute e +/- lim0 3434 if (scale < 0) { 3435 e = new SubINode(e, lim0); 3436 } else { 3437 e = new AddINode(e, lim0); 3438 } 3439 _igvn.register_new_node_with_optimizer(e); 3440 _phase->set_ctrl(e, pre_ctrl); 3441 3442 if (stride * scale > 0) { 3443 // compute V - (e +/- lim0) 3444 Node* va = _igvn.intcon(v_align); 3445 e = new SubINode(va, e); 3446 _igvn.register_new_node_with_optimizer(e); 3447 _phase->set_ctrl(e, pre_ctrl); 3448 } 3449 // compute N = (exp) % V 3450 Node* va_msk = _igvn.intcon(v_align - 1); 3451 Node* N = new AndINode(e, va_msk); 3452 _igvn.register_new_node_with_optimizer(N); 3453 _phase->set_ctrl(N, pre_ctrl); 3454 3455 // substitute back into (1), so that new limit 3456 // lim = lim0 + N 3457 Node* lim; 3458 if (stride < 0) { 3459 lim = new SubINode(lim0, N); 3460 } else { 3461 lim = new AddINode(lim0, N); 3462 } 3463 _igvn.register_new_node_with_optimizer(lim); 3464 _phase->set_ctrl(lim, pre_ctrl); 3465 Node* constrained = 3466 (stride > 0) ? (Node*) new MinINode(lim, orig_limit) 3467 : (Node*) new MaxINode(lim, orig_limit); 3468 _igvn.register_new_node_with_optimizer(constrained); 3469 _phase->set_ctrl(constrained, pre_ctrl); 3470 _igvn.replace_input_of(pre_opaq, 1, constrained); 3471 } 3472 3473 //----------------------------get_pre_loop_end--------------------------- 3474 // Find pre loop end from main loop. Returns null if none. 3475 CountedLoopEndNode* SuperWord::get_pre_loop_end(CountedLoopNode* cl) { 3476 // The loop cannot be optimized if the graph shape at 3477 // the loop entry is inappropriate. 3478 if (!PhaseIdealLoop::is_canonical_loop_entry(cl)) { 3479 return NULL; 3480 } 3481 3482 Node* p_f = cl->skip_predicates()->in(0)->in(0); 3483 if (!p_f->is_IfFalse()) return NULL; 3484 if (!p_f->in(0)->is_CountedLoopEnd()) return NULL; 3485 CountedLoopEndNode* pre_end = p_f->in(0)->as_CountedLoopEnd(); 3486 CountedLoopNode* loop_node = pre_end->loopnode(); 3487 if (loop_node == NULL || !loop_node->is_pre_loop()) return NULL; 3488 return pre_end; 3489 } 3490 3491 //------------------------------init--------------------------- 3492 void SuperWord::init() { 3493 _dg.init(); 3494 _packset.clear(); 3495 _disjoint_ptrs.clear(); 3496 _block.clear(); 3497 _post_block.clear(); 3498 _data_entry.clear(); 3499 _mem_slice_head.clear(); 3500 _mem_slice_tail.clear(); 3501 _iteration_first.clear(); 3502 _iteration_last.clear(); 3503 _node_info.clear(); 3504 _align_to_ref = NULL; 3505 _lpt = NULL; 3506 _lp = NULL; 3507 _bb = NULL; 3508 _iv = NULL; 3509 _race_possible = 0; 3510 _early_return = false; 3511 _num_work_vecs = 0; 3512 _num_reductions = 0; 3513 } 3514 3515 //------------------------------restart--------------------------- 3516 void SuperWord::restart() { 3517 _dg.init(); 3518 _packset.clear(); 3519 _disjoint_ptrs.clear(); 3520 _block.clear(); 3521 _post_block.clear(); 3522 _data_entry.clear(); 3523 _mem_slice_head.clear(); 3524 _mem_slice_tail.clear(); 3525 _node_info.clear(); 3526 } 3527 3528 //------------------------------print_packset--------------------------- 3529 void SuperWord::print_packset() { 3530 #ifndef PRODUCT 3531 tty->print_cr("packset"); 3532 for (int i = 0; i < _packset.length(); i++) { 3533 tty->print_cr("Pack: %d", i); 3534 Node_List* p = _packset.at(i); 3535 print_pack(p); 3536 } 3537 #endif 3538 } 3539 3540 //------------------------------print_pack--------------------------- 3541 void SuperWord::print_pack(Node_List* p) { 3542 for (uint i = 0; i < p->size(); i++) { 3543 print_stmt(p->at(i)); 3544 } 3545 } 3546 3547 //------------------------------print_bb--------------------------- 3548 void SuperWord::print_bb() { 3549 #ifndef PRODUCT 3550 tty->print_cr("\nBlock"); 3551 for (int i = 0; i < _block.length(); i++) { 3552 Node* n = _block.at(i); 3553 tty->print("%d ", i); 3554 if (n) { 3555 n->dump(); 3556 } 3557 } 3558 #endif 3559 } 3560 3561 //------------------------------print_stmt--------------------------- 3562 void SuperWord::print_stmt(Node* s) { 3563 #ifndef PRODUCT 3564 tty->print(" align: %d \t", alignment(s)); 3565 s->dump(); 3566 #endif 3567 } 3568 3569 //------------------------------blank--------------------------- 3570 char* SuperWord::blank(uint depth) { 3571 static char blanks[101]; 3572 assert(depth < 101, "too deep"); 3573 for (uint i = 0; i < depth; i++) blanks[i] = ' '; 3574 blanks[depth] = '\0'; 3575 return blanks; 3576 } 3577 3578 3579 //==============================SWPointer=========================== 3580 #ifndef PRODUCT 3581 int SWPointer::Tracer::_depth = 0; 3582 #endif 3583 //----------------------------SWPointer------------------------ 3584 SWPointer::SWPointer(MemNode* mem, SuperWord* slp, Node_Stack *nstack, bool analyze_only) : 3585 _mem(mem), _slp(slp), _base(NULL), _adr(NULL), 3586 _scale(0), _offset(0), _invar(NULL), _negate_invar(false), 3587 _nstack(nstack), _analyze_only(analyze_only), 3588 _stack_idx(0) 3589 #ifndef PRODUCT 3590 , _tracer(slp) 3591 #endif 3592 { 3593 NOT_PRODUCT(_tracer.ctor_1(mem);) 3594 3595 Node* adr = mem->in(MemNode::Address); 3596 if (!adr->is_AddP()) { 3597 assert(!valid(), "too complex"); 3598 return; 3599 } 3600 // Match AddP(base, AddP(ptr, k*iv [+ invariant]), constant) 3601 Node* base = adr->in(AddPNode::Base); 3602 // The base address should be loop invariant 3603 if (!invariant(base)) { 3604 assert(!valid(), "base address is loop variant"); 3605 return; 3606 } 3607 // unsafe references require misaligned vector access support 3608 if (base->is_top() && !Matcher::misaligned_vectors_ok()) { 3609 assert(!valid(), "unsafe access"); 3610 return; 3611 } 3612 3613 NOT_PRODUCT(if(_slp->is_trace_alignment()) _tracer.store_depth();) 3614 NOT_PRODUCT(_tracer.ctor_2(adr);) 3615 3616 int i; 3617 for (i = 0; i < 3; i++) { 3618 NOT_PRODUCT(_tracer.ctor_3(adr, i);) 3619 3620 if (!scaled_iv_plus_offset(adr->in(AddPNode::Offset))) { 3621 assert(!valid(), "too complex"); 3622 return; 3623 } 3624 adr = adr->in(AddPNode::Address); 3625 NOT_PRODUCT(_tracer.ctor_4(adr, i);) 3626 3627 if (base == adr || !adr->is_AddP()) { 3628 NOT_PRODUCT(_tracer.ctor_5(adr, base, i);) 3629 break; // stop looking at addp's 3630 } 3631 } 3632 if (!invariant(adr)) { 3633 assert(!valid(), "adr is loop variant"); 3634 return; 3635 } 3636 3637 if (!base->is_top() && adr != base) { 3638 assert(!valid(), "adr and base differ"); 3639 return; 3640 } 3641 3642 NOT_PRODUCT(if(_slp->is_trace_alignment()) _tracer.restore_depth();) 3643 NOT_PRODUCT(_tracer.ctor_6(mem);) 3644 3645 _base = base; 3646 _adr = adr; 3647 assert(valid(), "Usable"); 3648 } 3649 3650 // Following is used to create a temporary object during 3651 // the pattern match of an address expression. 3652 SWPointer::SWPointer(SWPointer* p) : 3653 _mem(p->_mem), _slp(p->_slp), _base(NULL), _adr(NULL), 3654 _scale(0), _offset(0), _invar(NULL), _negate_invar(false), 3655 _nstack(p->_nstack), _analyze_only(p->_analyze_only), 3656 _stack_idx(p->_stack_idx) 3657 #ifndef PRODUCT 3658 , _tracer(p->_slp) 3659 #endif 3660 {} 3661 3662 3663 bool SWPointer::invariant(Node* n) { 3664 NOT_PRODUCT(Tracer::Depth dd;) 3665 Node *n_c = phase()->get_ctrl(n); 3666 NOT_PRODUCT(_tracer.invariant_1(n, n_c);) 3667 return !lpt()->is_member(phase()->get_loop(n_c)); 3668 } 3669 //------------------------scaled_iv_plus_offset-------------------- 3670 // Match: k*iv + offset 3671 // where: k is a constant that maybe zero, and 3672 // offset is (k2 [+/- invariant]) where k2 maybe zero and invariant is optional 3673 bool SWPointer::scaled_iv_plus_offset(Node* n) { 3674 NOT_PRODUCT(Tracer::Depth ddd;) 3675 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_1(n);) 3676 3677 if (scaled_iv(n)) { 3678 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_2(n);) 3679 return true; 3680 } 3681 3682 if (offset_plus_k(n)) { 3683 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_3(n);) 3684 return true; 3685 } 3686 3687 int opc = n->Opcode(); 3688 if (opc == Op_AddI) { 3689 if (scaled_iv(n->in(1)) && offset_plus_k(n->in(2))) { 3690 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_4(n);) 3691 return true; 3692 } 3693 if (scaled_iv(n->in(2)) && offset_plus_k(n->in(1))) { 3694 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_5(n);) 3695 return true; 3696 } 3697 } else if (opc == Op_SubI) { 3698 if (scaled_iv(n->in(1)) && offset_plus_k(n->in(2), true)) { 3699 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_6(n);) 3700 return true; 3701 } 3702 if (scaled_iv(n->in(2)) && offset_plus_k(n->in(1))) { 3703 _scale *= -1; 3704 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_7(n);) 3705 return true; 3706 } 3707 } 3708 3709 NOT_PRODUCT(_tracer.scaled_iv_plus_offset_8(n);) 3710 return false; 3711 } 3712 3713 //----------------------------scaled_iv------------------------ 3714 // Match: k*iv where k is a constant that's not zero 3715 bool SWPointer::scaled_iv(Node* n) { 3716 NOT_PRODUCT(Tracer::Depth ddd;) 3717 NOT_PRODUCT(_tracer.scaled_iv_1(n);) 3718 3719 if (_scale != 0) { // already found a scale 3720 NOT_PRODUCT(_tracer.scaled_iv_2(n, _scale);) 3721 return false; 3722 } 3723 3724 if (n == iv()) { 3725 _scale = 1; 3726 NOT_PRODUCT(_tracer.scaled_iv_3(n, _scale);) 3727 return true; 3728 } 3729 if (_analyze_only && (invariant(n) == false)) { 3730 _nstack->push(n, _stack_idx++); 3731 } 3732 3733 int opc = n->Opcode(); 3734 if (opc == Op_MulI) { 3735 if (n->in(1) == iv() && n->in(2)->is_Con()) { 3736 _scale = n->in(2)->get_int(); 3737 NOT_PRODUCT(_tracer.scaled_iv_4(n, _scale);) 3738 return true; 3739 } else if (n->in(2) == iv() && n->in(1)->is_Con()) { 3740 _scale = n->in(1)->get_int(); 3741 NOT_PRODUCT(_tracer.scaled_iv_5(n, _scale);) 3742 return true; 3743 } 3744 } else if (opc == Op_LShiftI) { 3745 if (n->in(1) == iv() && n->in(2)->is_Con()) { 3746 _scale = 1 << n->in(2)->get_int(); 3747 NOT_PRODUCT(_tracer.scaled_iv_6(n, _scale);) 3748 return true; 3749 } 3750 } else if (opc == Op_ConvI2L) { 3751 if (n->in(1)->Opcode() == Op_CastII && 3752 n->in(1)->as_CastII()->has_range_check()) { 3753 // Skip range check dependent CastII nodes 3754 n = n->in(1); 3755 } 3756 if (scaled_iv_plus_offset(n->in(1))) { 3757 NOT_PRODUCT(_tracer.scaled_iv_7(n);) 3758 return true; 3759 } 3760 } else if (opc == Op_LShiftL) { 3761 if (!has_iv() && _invar == NULL) { 3762 // Need to preserve the current _offset value, so 3763 // create a temporary object for this expression subtree. 3764 // Hacky, so should re-engineer the address pattern match. 3765 NOT_PRODUCT(Tracer::Depth dddd;) 3766 SWPointer tmp(this); 3767 NOT_PRODUCT(_tracer.scaled_iv_8(n, &tmp);) 3768 3769 if (tmp.scaled_iv_plus_offset(n->in(1))) { 3770 if (tmp._invar == NULL || _slp->do_vector_loop()) { 3771 int mult = 1 << n->in(2)->get_int(); 3772 _scale = tmp._scale * mult; 3773 _offset += tmp._offset * mult; 3774 NOT_PRODUCT(_tracer.scaled_iv_9(n, _scale, _offset, mult);) 3775 return true; 3776 } 3777 } 3778 } 3779 } 3780 NOT_PRODUCT(_tracer.scaled_iv_10(n);) 3781 return false; 3782 } 3783 3784 //----------------------------offset_plus_k------------------------ 3785 // Match: offset is (k [+/- invariant]) 3786 // where k maybe zero and invariant is optional, but not both. 3787 bool SWPointer::offset_plus_k(Node* n, bool negate) { 3788 NOT_PRODUCT(Tracer::Depth ddd;) 3789 NOT_PRODUCT(_tracer.offset_plus_k_1(n);) 3790 3791 int opc = n->Opcode(); 3792 if (opc == Op_ConI) { 3793 _offset += negate ? -(n->get_int()) : n->get_int(); 3794 NOT_PRODUCT(_tracer.offset_plus_k_2(n, _offset);) 3795 return true; 3796 } else if (opc == Op_ConL) { 3797 // Okay if value fits into an int 3798 const TypeLong* t = n->find_long_type(); 3799 if (t->higher_equal(TypeLong::INT)) { 3800 jlong loff = n->get_long(); 3801 jint off = (jint)loff; 3802 _offset += negate ? -off : loff; 3803 NOT_PRODUCT(_tracer.offset_plus_k_3(n, _offset);) 3804 return true; 3805 } 3806 NOT_PRODUCT(_tracer.offset_plus_k_4(n);) 3807 return false; 3808 } 3809 if (_invar != NULL) { // already has an invariant 3810 NOT_PRODUCT(_tracer.offset_plus_k_5(n, _invar);) 3811 return false; 3812 } 3813 3814 if (_analyze_only && (invariant(n) == false)) { 3815 _nstack->push(n, _stack_idx++); 3816 } 3817 if (opc == Op_AddI) { 3818 if (n->in(2)->is_Con() && invariant(n->in(1))) { 3819 _negate_invar = negate; 3820 _invar = n->in(1); 3821 _offset += negate ? -(n->in(2)->get_int()) : n->in(2)->get_int(); 3822 NOT_PRODUCT(_tracer.offset_plus_k_6(n, _invar, _negate_invar, _offset);) 3823 return true; 3824 } else if (n->in(1)->is_Con() && invariant(n->in(2))) { 3825 _offset += negate ? -(n->in(1)->get_int()) : n->in(1)->get_int(); 3826 _negate_invar = negate; 3827 _invar = n->in(2); 3828 NOT_PRODUCT(_tracer.offset_plus_k_7(n, _invar, _negate_invar, _offset);) 3829 return true; 3830 } 3831 } 3832 if (opc == Op_SubI) { 3833 if (n->in(2)->is_Con() && invariant(n->in(1))) { 3834 _negate_invar = negate; 3835 _invar = n->in(1); 3836 _offset += !negate ? -(n->in(2)->get_int()) : n->in(2)->get_int(); 3837 NOT_PRODUCT(_tracer.offset_plus_k_8(n, _invar, _negate_invar, _offset);) 3838 return true; 3839 } else if (n->in(1)->is_Con() && invariant(n->in(2))) { 3840 _offset += negate ? -(n->in(1)->get_int()) : n->in(1)->get_int(); 3841 _negate_invar = !negate; 3842 _invar = n->in(2); 3843 NOT_PRODUCT(_tracer.offset_plus_k_9(n, _invar, _negate_invar, _offset);) 3844 return true; 3845 } 3846 } 3847 if (invariant(n)) { 3848 if (opc == Op_ConvI2L) { 3849 n = n->in(1); 3850 if (n->Opcode() == Op_CastII && 3851 n->as_CastII()->has_range_check()) { 3852 // Skip range check dependent CastII nodes 3853 assert(invariant(n), "sanity"); 3854 n = n->in(1); 3855 } 3856 } 3857 _negate_invar = negate; 3858 _invar = n; 3859 NOT_PRODUCT(_tracer.offset_plus_k_10(n, _invar, _negate_invar, _offset);) 3860 return true; 3861 } 3862 3863 NOT_PRODUCT(_tracer.offset_plus_k_11(n);) 3864 return false; 3865 } 3866 3867 //----------------------------print------------------------ 3868 void SWPointer::print() { 3869 #ifndef PRODUCT 3870 tty->print("base: %d adr: %d scale: %d offset: %d invar: %c%d\n", 3871 _base != NULL ? _base->_idx : 0, 3872 _adr != NULL ? _adr->_idx : 0, 3873 _scale, _offset, 3874 _negate_invar?'-':'+', 3875 _invar != NULL ? _invar->_idx : 0); 3876 #endif 3877 } 3878 3879 //----------------------------tracing------------------------ 3880 #ifndef PRODUCT 3881 void SWPointer::Tracer::print_depth() { 3882 for (int ii = 0; ii<_depth; ++ii) tty->print(" "); 3883 } 3884 3885 void SWPointer::Tracer::ctor_1 (Node* mem) { 3886 if(_slp->is_trace_alignment()) { 3887 print_depth(); tty->print(" %d SWPointer::SWPointer: start alignment analysis", mem->_idx); mem->dump(); 3888 } 3889 } 3890 3891 void SWPointer::Tracer::ctor_2(Node* adr) { 3892 if(_slp->is_trace_alignment()) { 3893 //store_depth(); 3894 inc_depth(); 3895 print_depth(); tty->print(" %d (adr) SWPointer::SWPointer: ", adr->_idx); adr->dump(); 3896 inc_depth(); 3897 print_depth(); tty->print(" %d (base) SWPointer::SWPointer: ", adr->in(AddPNode::Base)->_idx); adr->in(AddPNode::Base)->dump(); 3898 } 3899 } 3900 3901 void SWPointer::Tracer::ctor_3(Node* adr, int i) { 3902 if(_slp->is_trace_alignment()) { 3903 inc_depth(); 3904 Node* offset = adr->in(AddPNode::Offset); 3905 print_depth(); tty->print(" %d (offset) SWPointer::SWPointer: i = %d: ", offset->_idx, i); offset->dump(); 3906 } 3907 } 3908 3909 void SWPointer::Tracer::ctor_4(Node* adr, int i) { 3910 if(_slp->is_trace_alignment()) { 3911 inc_depth(); 3912 print_depth(); tty->print(" %d (adr) SWPointer::SWPointer: i = %d: ", adr->_idx, i); adr->dump(); 3913 } 3914 } 3915 3916 void SWPointer::Tracer::ctor_5(Node* adr, Node* base, int i) { 3917 if(_slp->is_trace_alignment()) { 3918 inc_depth(); 3919 if (base == adr) { 3920 print_depth(); tty->print_cr(" \\ %d (adr) == %d (base) SWPointer::SWPointer: breaking analysis at i = %d", adr->_idx, base->_idx, i); 3921 } else if (!adr->is_AddP()) { 3922 print_depth(); tty->print_cr(" \\ %d (adr) is NOT Addp SWPointer::SWPointer: breaking analysis at i = %d", adr->_idx, i); 3923 } 3924 } 3925 } 3926 3927 void SWPointer::Tracer::ctor_6(Node* mem) { 3928 if(_slp->is_trace_alignment()) { 3929 //restore_depth(); 3930 print_depth(); tty->print_cr(" %d (adr) SWPointer::SWPointer: stop analysis", mem->_idx); 3931 } 3932 } 3933 3934 void SWPointer::Tracer::invariant_1(Node *n, Node *n_c) { 3935 if (_slp->do_vector_loop() && _slp->is_debug() && _slp->_lpt->is_member(_slp->_phase->get_loop(n_c)) != (int)_slp->in_bb(n)) { 3936 int is_member = _slp->_lpt->is_member(_slp->_phase->get_loop(n_c)); 3937 int in_bb = _slp->in_bb(n); 3938 print_depth(); tty->print(" \\ "); tty->print_cr(" %d SWPointer::invariant conditions differ: n_c %d", n->_idx, n_c->_idx); 3939 print_depth(); tty->print(" \\ "); tty->print_cr("is_member %d, in_bb %d", is_member, in_bb); 3940 print_depth(); tty->print(" \\ "); n->dump(); 3941 print_depth(); tty->print(" \\ "); n_c->dump(); 3942 } 3943 } 3944 3945 void SWPointer::Tracer::scaled_iv_plus_offset_1(Node* n) { 3946 if(_slp->is_trace_alignment()) { 3947 print_depth(); tty->print(" %d SWPointer::scaled_iv_plus_offset testing node: ", n->_idx); 3948 n->dump(); 3949 } 3950 } 3951 3952 void SWPointer::Tracer::scaled_iv_plus_offset_2(Node* n) { 3953 if(_slp->is_trace_alignment()) { 3954 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: PASSED", n->_idx); 3955 } 3956 } 3957 3958 void SWPointer::Tracer::scaled_iv_plus_offset_3(Node* n) { 3959 if(_slp->is_trace_alignment()) { 3960 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: PASSED", n->_idx); 3961 } 3962 } 3963 3964 void SWPointer::Tracer::scaled_iv_plus_offset_4(Node* n) { 3965 if(_slp->is_trace_alignment()) { 3966 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: Op_AddI PASSED", n->_idx); 3967 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(1) is scaled_iv: ", n->in(1)->_idx); n->in(1)->dump(); 3968 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(2) is offset_plus_k: ", n->in(2)->_idx); n->in(2)->dump(); 3969 } 3970 } 3971 3972 void SWPointer::Tracer::scaled_iv_plus_offset_5(Node* n) { 3973 if(_slp->is_trace_alignment()) { 3974 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: Op_AddI PASSED", n->_idx); 3975 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(2) is scaled_iv: ", n->in(2)->_idx); n->in(2)->dump(); 3976 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(1) is offset_plus_k: ", n->in(1)->_idx); n->in(1)->dump(); 3977 } 3978 } 3979 3980 void SWPointer::Tracer::scaled_iv_plus_offset_6(Node* n) { 3981 if(_slp->is_trace_alignment()) { 3982 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: Op_SubI PASSED", n->_idx); 3983 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(1) is scaled_iv: ", n->in(1)->_idx); n->in(1)->dump(); 3984 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(2) is offset_plus_k: ", n->in(2)->_idx); n->in(2)->dump(); 3985 } 3986 } 3987 3988 void SWPointer::Tracer::scaled_iv_plus_offset_7(Node* n) { 3989 if(_slp->is_trace_alignment()) { 3990 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: Op_SubI PASSED", n->_idx); 3991 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(2) is scaled_iv: ", n->in(2)->_idx); n->in(2)->dump(); 3992 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv_plus_offset: in(1) is offset_plus_k: ", n->in(1)->_idx); n->in(1)->dump(); 3993 } 3994 } 3995 3996 void SWPointer::Tracer::scaled_iv_plus_offset_8(Node* n) { 3997 if(_slp->is_trace_alignment()) { 3998 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv_plus_offset: FAILED", n->_idx); 3999 } 4000 } 4001 4002 void SWPointer::Tracer::scaled_iv_1(Node* n) { 4003 if(_slp->is_trace_alignment()) { 4004 print_depth(); tty->print(" %d SWPointer::scaled_iv: testing node: ", n->_idx); n->dump(); 4005 } 4006 } 4007 4008 void SWPointer::Tracer::scaled_iv_2(Node* n, int scale) { 4009 if(_slp->is_trace_alignment()) { 4010 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: FAILED since another _scale has been detected before", n->_idx); 4011 print_depth(); tty->print_cr(" \\ SWPointer::scaled_iv: _scale (%d) != 0", scale); 4012 } 4013 } 4014 4015 void SWPointer::Tracer::scaled_iv_3(Node* n, int scale) { 4016 if(_slp->is_trace_alignment()) { 4017 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: is iv, setting _scale = %d", n->_idx, scale); 4018 } 4019 } 4020 4021 void SWPointer::Tracer::scaled_iv_4(Node* n, int scale) { 4022 if(_slp->is_trace_alignment()) { 4023 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: Op_MulI PASSED, setting _scale = %d", n->_idx, scale); 4024 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(1) is iv: ", n->in(1)->_idx); n->in(1)->dump(); 4025 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(2) is Con: ", n->in(2)->_idx); n->in(2)->dump(); 4026 } 4027 } 4028 4029 void SWPointer::Tracer::scaled_iv_5(Node* n, int scale) { 4030 if(_slp->is_trace_alignment()) { 4031 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: Op_MulI PASSED, setting _scale = %d", n->_idx, scale); 4032 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(2) is iv: ", n->in(2)->_idx); n->in(2)->dump(); 4033 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(1) is Con: ", n->in(1)->_idx); n->in(1)->dump(); 4034 } 4035 } 4036 4037 void SWPointer::Tracer::scaled_iv_6(Node* n, int scale) { 4038 if(_slp->is_trace_alignment()) { 4039 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: Op_LShiftI PASSED, setting _scale = %d", n->_idx, scale); 4040 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(1) is iv: ", n->in(1)->_idx); n->in(1)->dump(); 4041 print_depth(); tty->print(" \\ %d SWPointer::scaled_iv: in(2) is Con: ", n->in(2)->_idx); n->in(2)->dump(); 4042 } 4043 } 4044 4045 void SWPointer::Tracer::scaled_iv_7(Node* n) { 4046 if(_slp->is_trace_alignment()) { 4047 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: Op_ConvI2L PASSED", n->_idx); 4048 print_depth(); tty->print_cr(" \\ SWPointer::scaled_iv: in(1) %d is scaled_iv_plus_offset: ", n->in(1)->_idx); 4049 inc_depth(); inc_depth(); 4050 print_depth(); n->in(1)->dump(); 4051 dec_depth(); dec_depth(); 4052 } 4053 } 4054 4055 void SWPointer::Tracer::scaled_iv_8(Node* n, SWPointer* tmp) { 4056 if(_slp->is_trace_alignment()) { 4057 print_depth(); tty->print(" %d SWPointer::scaled_iv: Op_LShiftL, creating tmp SWPointer: ", n->_idx); tmp->print(); 4058 } 4059 } 4060 4061 void SWPointer::Tracer::scaled_iv_9(Node* n, int scale, int _offset, int mult) { 4062 if(_slp->is_trace_alignment()) { 4063 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: Op_LShiftL PASSED, setting _scale = %d, _offset = %d", n->_idx, scale, _offset); 4064 print_depth(); tty->print_cr(" \\ SWPointer::scaled_iv: in(1) %d is scaled_iv_plus_offset, in(2) %d used to get mult = %d: _scale = %d, _offset = %d", 4065 n->in(1)->_idx, n->in(2)->_idx, mult, scale, _offset); 4066 inc_depth(); inc_depth(); 4067 print_depth(); n->in(1)->dump(); 4068 print_depth(); n->in(2)->dump(); 4069 dec_depth(); dec_depth(); 4070 } 4071 } 4072 4073 void SWPointer::Tracer::scaled_iv_10(Node* n) { 4074 if(_slp->is_trace_alignment()) { 4075 print_depth(); tty->print_cr(" %d SWPointer::scaled_iv: FAILED", n->_idx); 4076 } 4077 } 4078 4079 void SWPointer::Tracer::offset_plus_k_1(Node* n) { 4080 if(_slp->is_trace_alignment()) { 4081 print_depth(); tty->print(" %d SWPointer::offset_plus_k: testing node: ", n->_idx); n->dump(); 4082 } 4083 } 4084 4085 void SWPointer::Tracer::offset_plus_k_2(Node* n, int _offset) { 4086 if(_slp->is_trace_alignment()) { 4087 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_ConI PASSED, setting _offset = %d", n->_idx, _offset); 4088 } 4089 } 4090 4091 void SWPointer::Tracer::offset_plus_k_3(Node* n, int _offset) { 4092 if(_slp->is_trace_alignment()) { 4093 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_ConL PASSED, setting _offset = %d", n->_idx, _offset); 4094 } 4095 } 4096 4097 void SWPointer::Tracer::offset_plus_k_4(Node* n) { 4098 if(_slp->is_trace_alignment()) { 4099 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: FAILED", n->_idx); 4100 print_depth(); tty->print_cr(" \\ " JLONG_FORMAT " SWPointer::offset_plus_k: Op_ConL FAILED, k is too big", n->get_long()); 4101 } 4102 } 4103 4104 void SWPointer::Tracer::offset_plus_k_5(Node* n, Node* _invar) { 4105 if(_slp->is_trace_alignment()) { 4106 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: FAILED since another invariant has been detected before", n->_idx); 4107 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: _invar != NULL: ", _invar->_idx); _invar->dump(); 4108 } 4109 } 4110 4111 void SWPointer::Tracer::offset_plus_k_6(Node* n, Node* _invar, bool _negate_invar, int _offset) { 4112 if(_slp->is_trace_alignment()) { 4113 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_AddI PASSED, setting _negate_invar = %d, _invar = %d, _offset = %d", 4114 n->_idx, _negate_invar, _invar->_idx, _offset); 4115 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(2) is Con: ", n->in(2)->_idx); n->in(2)->dump(); 4116 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(1) is invariant: ", _invar->_idx); _invar->dump(); 4117 } 4118 } 4119 4120 void SWPointer::Tracer::offset_plus_k_7(Node* n, Node* _invar, bool _negate_invar, int _offset) { 4121 if(_slp->is_trace_alignment()) { 4122 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_AddI PASSED, setting _negate_invar = %d, _invar = %d, _offset = %d", 4123 n->_idx, _negate_invar, _invar->_idx, _offset); 4124 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(1) is Con: ", n->in(1)->_idx); n->in(1)->dump(); 4125 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(2) is invariant: ", _invar->_idx); _invar->dump(); 4126 } 4127 } 4128 4129 void SWPointer::Tracer::offset_plus_k_8(Node* n, Node* _invar, bool _negate_invar, int _offset) { 4130 if(_slp->is_trace_alignment()) { 4131 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_SubI is PASSED, setting _negate_invar = %d, _invar = %d, _offset = %d", 4132 n->_idx, _negate_invar, _invar->_idx, _offset); 4133 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(2) is Con: ", n->in(2)->_idx); n->in(2)->dump(); 4134 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(1) is invariant: ", _invar->_idx); _invar->dump(); 4135 } 4136 } 4137 4138 void SWPointer::Tracer::offset_plus_k_9(Node* n, Node* _invar, bool _negate_invar, int _offset) { 4139 if(_slp->is_trace_alignment()) { 4140 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: Op_SubI PASSED, setting _negate_invar = %d, _invar = %d, _offset = %d", n->_idx, _negate_invar, _invar->_idx, _offset); 4141 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(1) is Con: ", n->in(1)->_idx); n->in(1)->dump(); 4142 print_depth(); tty->print(" \\ %d SWPointer::offset_plus_k: in(2) is invariant: ", _invar->_idx); _invar->dump(); 4143 } 4144 } 4145 4146 void SWPointer::Tracer::offset_plus_k_10(Node* n, Node* _invar, bool _negate_invar, int _offset) { 4147 if(_slp->is_trace_alignment()) { 4148 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: PASSED, setting _negate_invar = %d, _invar = %d, _offset = %d", n->_idx, _negate_invar, _invar->_idx, _offset); 4149 print_depth(); tty->print_cr(" \\ %d SWPointer::offset_plus_k: is invariant", n->_idx); 4150 } 4151 } 4152 4153 void SWPointer::Tracer::offset_plus_k_11(Node* n) { 4154 if(_slp->is_trace_alignment()) { 4155 print_depth(); tty->print_cr(" %d SWPointer::offset_plus_k: FAILED", n->_idx); 4156 } 4157 } 4158 4159 #endif 4160 // ========================= OrderedPair ===================== 4161 4162 const OrderedPair OrderedPair::initial; 4163 4164 // ========================= SWNodeInfo ===================== 4165 4166 const SWNodeInfo SWNodeInfo::initial; 4167 4168 4169 // ============================ DepGraph =========================== 4170 4171 //------------------------------make_node--------------------------- 4172 // Make a new dependence graph node for an ideal node. 4173 DepMem* DepGraph::make_node(Node* node) { 4174 DepMem* m = new (_arena) DepMem(node); 4175 if (node != NULL) { 4176 assert(_map.at_grow(node->_idx) == NULL, "one init only"); 4177 _map.at_put_grow(node->_idx, m); 4178 } 4179 return m; 4180 } 4181 4182 //------------------------------make_edge--------------------------- 4183 // Make a new dependence graph edge from dpred -> dsucc 4184 DepEdge* DepGraph::make_edge(DepMem* dpred, DepMem* dsucc) { 4185 DepEdge* e = new (_arena) DepEdge(dpred, dsucc, dsucc->in_head(), dpred->out_head()); 4186 dpred->set_out_head(e); 4187 dsucc->set_in_head(e); 4188 return e; 4189 } 4190 4191 // ========================== DepMem ======================== 4192 4193 //------------------------------in_cnt--------------------------- 4194 int DepMem::in_cnt() { 4195 int ct = 0; 4196 for (DepEdge* e = _in_head; e != NULL; e = e->next_in()) ct++; 4197 return ct; 4198 } 4199 4200 //------------------------------out_cnt--------------------------- 4201 int DepMem::out_cnt() { 4202 int ct = 0; 4203 for (DepEdge* e = _out_head; e != NULL; e = e->next_out()) ct++; 4204 return ct; 4205 } 4206 4207 //------------------------------print----------------------------- 4208 void DepMem::print() { 4209 #ifndef PRODUCT 4210 tty->print(" DepNode %d (", _node->_idx); 4211 for (DepEdge* p = _in_head; p != NULL; p = p->next_in()) { 4212 Node* pred = p->pred()->node(); 4213 tty->print(" %d", pred != NULL ? pred->_idx : 0); 4214 } 4215 tty->print(") ["); 4216 for (DepEdge* s = _out_head; s != NULL; s = s->next_out()) { 4217 Node* succ = s->succ()->node(); 4218 tty->print(" %d", succ != NULL ? succ->_idx : 0); 4219 } 4220 tty->print_cr(" ]"); 4221 #endif 4222 } 4223 4224 // =========================== DepEdge ========================= 4225 4226 //------------------------------DepPreds--------------------------- 4227 void DepEdge::print() { 4228 #ifndef PRODUCT 4229 tty->print_cr("DepEdge: %d [ %d ]", _pred->node()->_idx, _succ->node()->_idx); 4230 #endif 4231 } 4232 4233 // =========================== DepPreds ========================= 4234 // Iterator over predecessor edges in the dependence graph. 4235 4236 //------------------------------DepPreds--------------------------- 4237 DepPreds::DepPreds(Node* n, DepGraph& dg) { 4238 _n = n; 4239 _done = false; 4240 if (_n->is_Store() || _n->is_Load()) { 4241 _next_idx = MemNode::Address; 4242 _end_idx = n->req(); 4243 _dep_next = dg.dep(_n)->in_head(); 4244 } else if (_n->is_Mem()) { 4245 _next_idx = 0; 4246 _end_idx = 0; 4247 _dep_next = dg.dep(_n)->in_head(); 4248 } else { 4249 _next_idx = 1; 4250 _end_idx = _n->req(); 4251 _dep_next = NULL; 4252 } 4253 next(); 4254 } 4255 4256 //------------------------------next--------------------------- 4257 void DepPreds::next() { 4258 if (_dep_next != NULL) { 4259 _current = _dep_next->pred()->node(); 4260 _dep_next = _dep_next->next_in(); 4261 } else if (_next_idx < _end_idx) { 4262 _current = _n->in(_next_idx++); 4263 } else { 4264 _done = true; 4265 } 4266 } 4267 4268 // =========================== DepSuccs ========================= 4269 // Iterator over successor edges in the dependence graph. 4270 4271 //------------------------------DepSuccs--------------------------- 4272 DepSuccs::DepSuccs(Node* n, DepGraph& dg) { 4273 _n = n; 4274 _done = false; 4275 if (_n->is_Load()) { 4276 _next_idx = 0; 4277 _end_idx = _n->outcnt(); 4278 _dep_next = dg.dep(_n)->out_head(); 4279 } else if (_n->is_Mem() || (_n->is_Phi() && _n->bottom_type() == Type::MEMORY)) { 4280 _next_idx = 0; 4281 _end_idx = 0; 4282 _dep_next = dg.dep(_n)->out_head(); 4283 } else { 4284 _next_idx = 0; 4285 _end_idx = _n->outcnt(); 4286 _dep_next = NULL; 4287 } 4288 next(); 4289 } 4290 4291 //-------------------------------next--------------------------- 4292 void DepSuccs::next() { 4293 if (_dep_next != NULL) { 4294 _current = _dep_next->succ()->node(); 4295 _dep_next = _dep_next->next_out(); 4296 } else if (_next_idx < _end_idx) { 4297 _current = _n->raw_out(_next_idx++); 4298 } else { 4299 _done = true; 4300 } 4301 } 4302 4303 // 4304 // --------------------------------- vectorization/simd ----------------------------------- 4305 // 4306 bool SuperWord::same_origin_idx(Node* a, Node* b) const { 4307 return a != NULL && b != NULL && _clone_map.same_idx(a->_idx, b->_idx); 4308 } 4309 bool SuperWord::same_generation(Node* a, Node* b) const { 4310 return a != NULL && b != NULL && _clone_map.same_gen(a->_idx, b->_idx); 4311 } 4312 4313 Node* SuperWord::find_phi_for_mem_dep(LoadNode* ld) { 4314 assert(in_bb(ld), "must be in block"); 4315 if (_clone_map.gen(ld->_idx) == _ii_first) { 4316 #ifndef PRODUCT 4317 if (_vector_loop_debug) { 4318 tty->print_cr("SuperWord::find_phi_for_mem_dep _clone_map.gen(ld->_idx)=%d", 4319 _clone_map.gen(ld->_idx)); 4320 } 4321 #endif 4322 return NULL; //we think that any ld in the first gen being vectorizable 4323 } 4324 4325 Node* mem = ld->in(MemNode::Memory); 4326 if (mem->outcnt() <= 1) { 4327 // we don't want to remove the only edge from mem node to load 4328 #ifndef PRODUCT 4329 if (_vector_loop_debug) { 4330 tty->print_cr("SuperWord::find_phi_for_mem_dep input node %d to load %d has no other outputs and edge mem->load cannot be removed", 4331 mem->_idx, ld->_idx); 4332 ld->dump(); 4333 mem->dump(); 4334 } 4335 #endif 4336 return NULL; 4337 } 4338 if (!in_bb(mem) || same_generation(mem, ld)) { 4339 #ifndef PRODUCT 4340 if (_vector_loop_debug) { 4341 tty->print_cr("SuperWord::find_phi_for_mem_dep _clone_map.gen(mem->_idx)=%d", 4342 _clone_map.gen(mem->_idx)); 4343 } 4344 #endif 4345 return NULL; // does not depend on loop volatile node or depends on the same generation 4346 } 4347 4348 //otherwise first node should depend on mem-phi 4349 Node* first = first_node(ld); 4350 assert(first->is_Load(), "must be Load"); 4351 Node* phi = first->as_Load()->in(MemNode::Memory); 4352 if (!phi->is_Phi() || phi->bottom_type() != Type::MEMORY) { 4353 #ifndef PRODUCT 4354 if (_vector_loop_debug) { 4355 tty->print_cr("SuperWord::find_phi_for_mem_dep load is not vectorizable node, since it's `first` does not take input from mem phi"); 4356 ld->dump(); 4357 first->dump(); 4358 } 4359 #endif 4360 return NULL; 4361 } 4362 4363 Node* tail = 0; 4364 for (int m = 0; m < _mem_slice_head.length(); m++) { 4365 if (_mem_slice_head.at(m) == phi) { 4366 tail = _mem_slice_tail.at(m); 4367 } 4368 } 4369 if (tail == 0) { //test that found phi is in the list _mem_slice_head 4370 #ifndef PRODUCT 4371 if (_vector_loop_debug) { 4372 tty->print_cr("SuperWord::find_phi_for_mem_dep load %d is not vectorizable node, its phi %d is not _mem_slice_head", 4373 ld->_idx, phi->_idx); 4374 ld->dump(); 4375 phi->dump(); 4376 } 4377 #endif 4378 return NULL; 4379 } 4380 4381 // now all conditions are met 4382 return phi; 4383 } 4384 4385 Node* SuperWord::first_node(Node* nd) { 4386 for (int ii = 0; ii < _iteration_first.length(); ii++) { 4387 Node* nnn = _iteration_first.at(ii); 4388 if (same_origin_idx(nnn, nd)) { 4389 #ifndef PRODUCT 4390 if (_vector_loop_debug) { 4391 tty->print_cr("SuperWord::first_node: %d is the first iteration node for %d (_clone_map.idx(nnn->_idx) = %d)", 4392 nnn->_idx, nd->_idx, _clone_map.idx(nnn->_idx)); 4393 } 4394 #endif 4395 return nnn; 4396 } 4397 } 4398 4399 #ifndef PRODUCT 4400 if (_vector_loop_debug) { 4401 tty->print_cr("SuperWord::first_node: did not find first iteration node for %d (_clone_map.idx(nd->_idx)=%d)", 4402 nd->_idx, _clone_map.idx(nd->_idx)); 4403 } 4404 #endif 4405 return 0; 4406 } 4407 4408 Node* SuperWord::last_node(Node* nd) { 4409 for (int ii = 0; ii < _iteration_last.length(); ii++) { 4410 Node* nnn = _iteration_last.at(ii); 4411 if (same_origin_idx(nnn, nd)) { 4412 #ifndef PRODUCT 4413 if (_vector_loop_debug) { 4414 tty->print_cr("SuperWord::last_node _clone_map.idx(nnn->_idx)=%d, _clone_map.idx(nd->_idx)=%d", 4415 _clone_map.idx(nnn->_idx), _clone_map.idx(nd->_idx)); 4416 } 4417 #endif 4418 return nnn; 4419 } 4420 } 4421 return 0; 4422 } 4423 4424 int SuperWord::mark_generations() { 4425 Node *ii_err = NULL, *tail_err = NULL; 4426 for (int i = 0; i < _mem_slice_head.length(); i++) { 4427 Node* phi = _mem_slice_head.at(i); 4428 assert(phi->is_Phi(), "must be phi"); 4429 4430 Node* tail = _mem_slice_tail.at(i); 4431 if (_ii_last == -1) { 4432 tail_err = tail; 4433 _ii_last = _clone_map.gen(tail->_idx); 4434 } 4435 else if (_ii_last != _clone_map.gen(tail->_idx)) { 4436 #ifndef PRODUCT 4437 if (TraceSuperWord && Verbose) { 4438 tty->print_cr("SuperWord::mark_generations _ii_last error - found different generations in two tail nodes "); 4439 tail->dump(); 4440 tail_err->dump(); 4441 } 4442 #endif 4443 return -1; 4444 } 4445 4446 // find first iteration in the loop 4447 for (DUIterator_Fast imax, i = phi->fast_outs(imax); i < imax; i++) { 4448 Node* ii = phi->fast_out(i); 4449 if (in_bb(ii) && ii->is_Store()) { // we speculate that normally Stores of one and one only generation have deps from mem phi 4450 if (_ii_first == -1) { 4451 ii_err = ii; 4452 _ii_first = _clone_map.gen(ii->_idx); 4453 } else if (_ii_first != _clone_map.gen(ii->_idx)) { 4454 #ifndef PRODUCT 4455 if (TraceSuperWord && Verbose) { 4456 tty->print_cr("SuperWord::mark_generations: _ii_first was found before and not equal to one in this node (%d)", _ii_first); 4457 ii->dump(); 4458 if (ii_err!= 0) { 4459 ii_err->dump(); 4460 } 4461 } 4462 #endif 4463 return -1; // this phi has Stores from different generations of unroll and cannot be simd/vectorized 4464 } 4465 } 4466 }//for (DUIterator_Fast imax, 4467 }//for (int i... 4468 4469 if (_ii_first == -1 || _ii_last == -1) { 4470 if (TraceSuperWord && Verbose) { 4471 tty->print_cr("SuperWord::mark_generations unknown error, something vent wrong"); 4472 } 4473 return -1; // something vent wrong 4474 } 4475 // collect nodes in the first and last generations 4476 assert(_iteration_first.length() == 0, "_iteration_first must be empty"); 4477 assert(_iteration_last.length() == 0, "_iteration_last must be empty"); 4478 for (int j = 0; j < _block.length(); j++) { 4479 Node* n = _block.at(j); 4480 node_idx_t gen = _clone_map.gen(n->_idx); 4481 if ((signed)gen == _ii_first) { 4482 _iteration_first.push(n); 4483 } else if ((signed)gen == _ii_last) { 4484 _iteration_last.push(n); 4485 } 4486 } 4487 4488 // building order of iterations 4489 if (_ii_order.length() == 0 && ii_err != 0) { 4490 assert(in_bb(ii_err) && ii_err->is_Store(), "should be Store in bb"); 4491 Node* nd = ii_err; 4492 while(_clone_map.gen(nd->_idx) != _ii_last) { 4493 _ii_order.push(_clone_map.gen(nd->_idx)); 4494 bool found = false; 4495 for (DUIterator_Fast imax, i = nd->fast_outs(imax); i < imax; i++) { 4496 Node* use = nd->fast_out(i); 4497 if (same_origin_idx(use, nd) && use->as_Store()->in(MemNode::Memory) == nd) { 4498 found = true; 4499 nd = use; 4500 break; 4501 } 4502 }//for 4503 4504 if (found == false) { 4505 if (TraceSuperWord && Verbose) { 4506 tty->print_cr("SuperWord::mark_generations: Cannot build order of iterations - no dependent Store for %d", nd->_idx); 4507 } 4508 _ii_order.clear(); 4509 return -1; 4510 } 4511 } //while 4512 _ii_order.push(_clone_map.gen(nd->_idx)); 4513 } 4514 4515 #ifndef PRODUCT 4516 if (_vector_loop_debug) { 4517 tty->print_cr("SuperWord::mark_generations"); 4518 tty->print_cr("First generation (%d) nodes:", _ii_first); 4519 for (int ii = 0; ii < _iteration_first.length(); ii++) _iteration_first.at(ii)->dump(); 4520 tty->print_cr("Last generation (%d) nodes:", _ii_last); 4521 for (int ii = 0; ii < _iteration_last.length(); ii++) _iteration_last.at(ii)->dump(); 4522 tty->print_cr(" "); 4523 4524 tty->print("SuperWord::List of generations: "); 4525 for (int jj = 0; jj < _ii_order.length(); ++jj) { 4526 tty->print("%d:%d ", jj, _ii_order.at(jj)); 4527 } 4528 tty->print_cr(" "); 4529 } 4530 #endif 4531 4532 return _ii_first; 4533 } 4534 4535 bool SuperWord::fix_commutative_inputs(Node* gold, Node* fix) { 4536 assert(gold->is_Add() && fix->is_Add() || gold->is_Mul() && fix->is_Mul(), "should be only Add or Mul nodes"); 4537 assert(same_origin_idx(gold, fix), "should be clones of the same node"); 4538 Node* gin1 = gold->in(1); 4539 Node* gin2 = gold->in(2); 4540 Node* fin1 = fix->in(1); 4541 Node* fin2 = fix->in(2); 4542 bool swapped = false; 4543 4544 if (in_bb(gin1) && in_bb(gin2) && in_bb(fin1) && in_bb(fin1)) { 4545 if (same_origin_idx(gin1, fin1) && 4546 same_origin_idx(gin2, fin2)) { 4547 return true; // nothing to fix 4548 } 4549 if (same_origin_idx(gin1, fin2) && 4550 same_origin_idx(gin2, fin1)) { 4551 fix->swap_edges(1, 2); 4552 swapped = true; 4553 } 4554 } 4555 // at least one input comes from outside of bb 4556 if (gin1->_idx == fin1->_idx) { 4557 return true; // nothing to fix 4558 } 4559 if (!swapped && (gin1->_idx == fin2->_idx || gin2->_idx == fin1->_idx)) { //swapping is expensive, check condition first 4560 fix->swap_edges(1, 2); 4561 swapped = true; 4562 } 4563 4564 if (swapped) { 4565 #ifndef PRODUCT 4566 if (_vector_loop_debug) { 4567 tty->print_cr("SuperWord::fix_commutative_inputs: fixed node %d", fix->_idx); 4568 } 4569 #endif 4570 return true; 4571 } 4572 4573 if (TraceSuperWord && Verbose) { 4574 tty->print_cr("SuperWord::fix_commutative_inputs: cannot fix node %d", fix->_idx); 4575 } 4576 4577 return false; 4578 } 4579 4580 bool SuperWord::pack_parallel() { 4581 #ifndef PRODUCT 4582 if (_vector_loop_debug) { 4583 tty->print_cr("SuperWord::pack_parallel: START"); 4584 } 4585 #endif 4586 4587 _packset.clear(); 4588 4589 for (int ii = 0; ii < _iteration_first.length(); ii++) { 4590 Node* nd = _iteration_first.at(ii); 4591 if (in_bb(nd) && (nd->is_Load() || nd->is_Store() || nd->is_Add() || nd->is_Mul())) { 4592 Node_List* pk = new Node_List(); 4593 pk->push(nd); 4594 for (int gen = 1; gen < _ii_order.length(); ++gen) { 4595 for (int kk = 0; kk < _block.length(); kk++) { 4596 Node* clone = _block.at(kk); 4597 if (same_origin_idx(clone, nd) && 4598 _clone_map.gen(clone->_idx) == _ii_order.at(gen)) { 4599 if (nd->is_Add() || nd->is_Mul()) { 4600 fix_commutative_inputs(nd, clone); 4601 } 4602 pk->push(clone); 4603 if (pk->size() == 4) { 4604 _packset.append(pk); 4605 #ifndef PRODUCT 4606 if (_vector_loop_debug) { 4607 tty->print_cr("SuperWord::pack_parallel: added pack "); 4608 pk->dump(); 4609 } 4610 #endif 4611 if (_clone_map.gen(clone->_idx) != _ii_last) { 4612 pk = new Node_List(); 4613 } 4614 } 4615 break; 4616 } 4617 } 4618 }//for 4619 }//if 4620 }//for 4621 4622 #ifndef PRODUCT 4623 if (_vector_loop_debug) { 4624 tty->print_cr("SuperWord::pack_parallel: END"); 4625 } 4626 #endif 4627 4628 return true; 4629 } 4630 4631 bool SuperWord::hoist_loads_in_graph() { 4632 GrowableArray<Node*> loads; 4633 4634 #ifndef PRODUCT 4635 if (_vector_loop_debug) { 4636 tty->print_cr("SuperWord::hoist_loads_in_graph: total number _mem_slice_head.length() = %d", _mem_slice_head.length()); 4637 } 4638 #endif 4639 4640 for (int i = 0; i < _mem_slice_head.length(); i++) { 4641 Node* n = _mem_slice_head.at(i); 4642 if ( !in_bb(n) || !n->is_Phi() || n->bottom_type() != Type::MEMORY) { 4643 if (TraceSuperWord && Verbose) { 4644 tty->print_cr("SuperWord::hoist_loads_in_graph: skipping unexpected node n=%d", n->_idx); 4645 } 4646 continue; 4647 } 4648 4649 #ifndef PRODUCT 4650 if (_vector_loop_debug) { 4651 tty->print_cr("SuperWord::hoist_loads_in_graph: processing phi %d = _mem_slice_head.at(%d);", n->_idx, i); 4652 } 4653 #endif 4654 4655 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { 4656 Node* ld = n->fast_out(i); 4657 if (ld->is_Load() && ld->as_Load()->in(MemNode::Memory) == n && in_bb(ld)) { 4658 for (int i = 0; i < _block.length(); i++) { 4659 Node* ld2 = _block.at(i); 4660 if (ld2->is_Load() && same_origin_idx(ld, ld2) && 4661 !same_generation(ld, ld2)) { // <= do not collect the first generation ld 4662 #ifndef PRODUCT 4663 if (_vector_loop_debug) { 4664 tty->print_cr("SuperWord::hoist_loads_in_graph: will try to hoist load ld2->_idx=%d, cloned from %d (ld->_idx=%d)", 4665 ld2->_idx, _clone_map.idx(ld->_idx), ld->_idx); 4666 } 4667 #endif 4668 // could not do on-the-fly, since iterator is immutable 4669 loads.push(ld2); 4670 } 4671 }// for 4672 }//if 4673 }//for (DUIterator_Fast imax, 4674 }//for (int i = 0; i 4675 4676 for (int i = 0; i < loads.length(); i++) { 4677 LoadNode* ld = loads.at(i)->as_Load(); 4678 Node* phi = find_phi_for_mem_dep(ld); 4679 if (phi != NULL) { 4680 #ifndef PRODUCT 4681 if (_vector_loop_debug) { 4682 tty->print_cr("SuperWord::hoist_loads_in_graph replacing MemNode::Memory(%d) edge in %d with one from %d", 4683 MemNode::Memory, ld->_idx, phi->_idx); 4684 } 4685 #endif 4686 _igvn.replace_input_of(ld, MemNode::Memory, phi); 4687 } 4688 }//for 4689 4690 restart(); // invalidate all basic structures, since we rebuilt the graph 4691 4692 if (TraceSuperWord && Verbose) { 4693 tty->print_cr("\nSuperWord::hoist_loads_in_graph() the graph was rebuilt, all structures invalidated and need rebuild"); 4694 } 4695 4696 return true; 4697 }