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