c1_GraphBuilder.cpp revision 1472:c18cbe5936b8
1163953Srrs/* 2185694Srrs * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3235828Stuexen * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4235828Stuexen * 5163953Srrs * This code is free software; you can redistribute it and/or modify it 6163953Srrs * under the terms of the GNU General Public License version 2 only, as 7163953Srrs * published by the Free Software Foundation. 8163953Srrs * 9163953Srrs * This code is distributed in the hope that it will be useful, but WITHOUT 10228653Stuexen * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11163953Srrs * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12163953Srrs * version 2 for more details (a copy is included in the LICENSE file that 13163953Srrs * accompanied this code). 14228653Stuexen * 15163953Srrs * You should have received a copy of the GNU General Public License version 16163953Srrs * 2 along with this work; if not, write to the Free Software Foundation, 17163953Srrs * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18163953Srrs * 19163953Srrs * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20163953Srrs * or visit www.oracle.com if you need additional information or have any 21163953Srrs * questions. 22163953Srrs * 23163953Srrs */ 24163953Srrs 25163953Srrs#include "incls/_precompiled.incl" 26163953Srrs#include "incls/_c1_GraphBuilder.cpp.incl" 27163953Srrs 28163953Srrsclass BlockListBuilder VALUE_OBJ_CLASS_SPEC { 29163953Srrs private: 30163953Srrs Compilation* _compilation; 31163953Srrs IRScope* _scope; 32163953Srrs 33163953Srrs BlockList _blocks; // internal list of all blocks 34163953Srrs BlockList* _bci2block; // mapping from bci to blocks for GraphBuilder 35235828Stuexen 36166086Srrs // fields used by mark_loops 37163953Srrs BitMap _active; // for iteration of control flow graph 38163953Srrs BitMap _visited; // for iteration of control flow graph 39163953Srrs intArray _loop_map; // caches the information if a block is contained in a loop 40163953Srrs int _next_loop_index; // next free loop number 41238475Stuexen int _next_block_number; // for reverse postorder numbering of blocks 42275567Stuexen 43167695Srrs // accessors 44167598Srrs Compilation* compilation() const { return _compilation; } 45163953Srrs IRScope* scope() const { return _scope; } 46163953Srrs ciMethod* method() const { return scope()->method(); } 47163953Srrs XHandlers* xhandlers() const { return scope()->xhandlers(); } 48163953Srrs 49163953Srrs // unified bailout support 50163953Srrs void bailout(const char* msg) const { compilation()->bailout(msg); } 51163953Srrs bool bailed_out() const { return compilation()->bailed_out(); } 52170091Srrs 53185694Srrs // helper functions 54164085Srrs BlockBegin* make_block_at(int bci, BlockBegin* predecessor); 55163953Srrs void handle_exceptions(BlockBegin* current, int cur_bci); 56163953Srrs void handle_jsr(BlockBegin* current, int sr_bci, int next_bci); 57297208Stuexen void store_one(BlockBegin* current, int local); 58297208Stuexen void store_two(BlockBegin* current, int local); 59170091Srrs void set_entries(int osr_bci); 60163953Srrs void set_leaders(); 61163953Srrs 62163953Srrs void make_loop_header(BlockBegin* block); 63163953Srrs void mark_loops(); 64163953Srrs int mark_loops(BlockBegin* b, bool in_subroutine); 65179783Srrs 66179783Srrs // debugging 67163953Srrs#ifndef PRODUCT 68179783Srrs void print(); 69163953Srrs#endif 70163953Srrs 71163953Srrs public: 72163953Srrs // creation 73163953Srrs BlockListBuilder(Compilation* compilation, IRScope* scope, int osr_bci); 74179783Srrs 75170056Srrs // accessors for GraphBuilder 76163953Srrs BlockList* bci2block() const { return _bci2block; } 77163953Srrs}; 78163953Srrs 79163953Srrs 80163953Srrs// Implementation of BlockListBuilder 81179783Srrs 82179783SrrsBlockListBuilder::BlockListBuilder(Compilation* compilation, IRScope* scope, int osr_bci) 83179783Srrs : _compilation(compilation) 84179783Srrs , _scope(scope) 85179783Srrs , _blocks(16) 86179783Srrs , _bci2block(new BlockList(scope->method()->code_size(), NULL)) 87179783Srrs , _next_block_number(0) 88179783Srrs , _active() // size not known yet 89179783Srrs , _visited() // size not known yet 90163953Srrs , _next_loop_index(0) 91163953Srrs , _loop_map() // size not known yet 92301114Sbz{ 93301114Sbz set_entries(osr_bci); 94301114Sbz set_leaders(); 95179783Srrs CHECK_BAILOUT(); 96179783Srrs 97179783Srrs mark_loops(); 98303956Stuexen NOT_PRODUCT(if (PrintInitialBlockList) print()); 99301114Sbz 100301114Sbz#ifndef PRODUCT 101163953Srrs if (PrintCFGToFile) { 102179157Srrs stringStream title; 103228653Stuexen title.print("BlockListBuilder "); 104163953Srrs scope->method()->print_name(&title); 105163953Srrs CFGPrinter::print_cfg(_bci2block, title.as_string(), false, false); 106197257Stuexen } 107163953Srrs#endif 108163953Srrs} 109163953Srrs 110163953Srrs 111197257Stuexenvoid BlockListBuilder::set_entries(int osr_bci) { 112197257Stuexen // generate start blocks 113197257Stuexen BlockBegin* std_entry = make_block_at(0, NULL); 114197257Stuexen if (scope()->caller() == NULL) { 115163953Srrs std_entry->set(BlockBegin::std_entry_flag); 116197257Stuexen } 117163953Srrs if (osr_bci != -1) { 118163953Srrs BlockBegin* osr_entry = make_block_at(osr_bci, NULL); 119163953Srrs osr_entry->set(BlockBegin::osr_entry_flag); 120163953Srrs } 121197257Stuexen 122163953Srrs // generate exception entry blocks 123163953Srrs XHandlers* list = xhandlers(); 124163953Srrs const int n = list->length(); 125163953Srrs for (int i = 0; i < n; i++) { 126163953Srrs XHandler* h = list->handler_at(i); 127190689Srrs BlockBegin* entry = make_block_at(h->handler_bci(), NULL); 128190689Srrs entry->set(BlockBegin::exception_entry_flag); 129190689Srrs h->set_entry_block(entry); 130280404Stuexen } 131163953Srrs} 132280404Stuexen 133280404Stuexen 134280404StuexenBlockBegin* BlockListBuilder::make_block_at(int cur_bci, BlockBegin* predecessor) { 135280404Stuexen assert(method()->bci_block_start().at(cur_bci), "wrong block starts of MethodLivenessAnalyzer"); 136280404Stuexen 137297312Stuexen BlockBegin* block = _bci2block->at(cur_bci); 138280404Stuexen if (block == NULL) { 139280404Stuexen block = new BlockBegin(cur_bci); 140280404Stuexen block->init_stores_to_locals(method()->max_locals()); 141280404Stuexen _bci2block->at_put(cur_bci, block); 142163953Srrs _blocks.append(block); 143163953Srrs 144163953Srrs assert(predecessor == NULL || predecessor->bci() < cur_bci, "targets for backward branches must already exist"); 145163953Srrs } 146163953Srrs 147221249Stuexen if (predecessor != NULL) { 148298132Stuexen if (block->is_set(BlockBegin::exception_entry_flag)) { 149297880Stuexen BAILOUT_("Exception handler can be reached by both normal and exceptional control flow", block); 150163953Srrs } 151163953Srrs 152297880Stuexen predecessor->add_successor(block); 153297880Stuexen block->increment_total_preds(); 154297880Stuexen } 155297880Stuexen 156163953Srrs return block; 157237565Stuexen} 158172090Srrs 159172090Srrs 160172090Srrsinline void BlockListBuilder::store_one(BlockBegin* current, int local) { 161297880Stuexen current->stores_to_locals().set_bit(local); 162172091Srrs} 163297880Stuexeninline void BlockListBuilder::store_two(BlockBegin* current, int local) { 164172091Srrs store_one(current, local); 165172091Srrs store_one(current, local + 1); 166172091Srrs} 167172091Srrs 168297880Stuexen 169297880Stuexenvoid BlockListBuilder::handle_exceptions(BlockBegin* current, int cur_bci) { 170297880Stuexen // Draws edges from a block to its exception handlers 171297880Stuexen XHandlers* list = xhandlers(); 172297880Stuexen const int n = list->length(); 173297880Stuexen 174297880Stuexen for (int i = 0; i < n; i++) { 175297880Stuexen XHandler* h = list->handler_at(i); 176298132Stuexen 177172091Srrs if (h->covers(cur_bci)) { 178297880Stuexen BlockBegin* entry = h->entry_block(); 179172091Srrs assert(entry != NULL && entry == _bci2block->at(h->handler_bci()), "entry must be set"); 180224641Stuexen assert(entry->is_set(BlockBegin::exception_entry_flag), "flag must be set"); 181172091Srrs 182235414Stuexen // add each exception handler only once 183172091Srrs if (!current->is_successor(entry)) { 184172091Srrs current->add_successor(entry); 185172091Srrs entry->increment_total_preds(); 186297880Stuexen } 187297880Stuexen 188298132Stuexen // stop when reaching catchall 189235403Stuexen if (h->catch_type() == 0) break; 190237565Stuexen } 191172091Srrs } 192172091Srrs} 193172091Srrs 194172091Srrsvoid BlockListBuilder::handle_jsr(BlockBegin* current, int sr_bci, int next_bci) { 195172091Srrs // start a new block after jsr-bytecode and link this block into cfg 196172091Srrs make_block_at(next_bci, current); 197172090Srrs 198283650Stuexen // start a new block at the subroutine entry at mark it with special flag 199283650Stuexen BlockBegin* sr_block = make_block_at(sr_bci, current); 200237565Stuexen if (!sr_block->is_set(BlockBegin::subroutine_entry_flag)) { 201172091Srrs sr_block->set(BlockBegin::subroutine_entry_flag); 202172091Srrs } 203172090Srrs} 204172091Srrs 205297880Stuexen 206297880Stuexenvoid BlockListBuilder::set_leaders() { 207297880Stuexen bool has_xhandlers = xhandlers()->has_handlers(); 208297880Stuexen BlockBegin* current = NULL; 209297880Stuexen 210297880Stuexen // The information which bci starts a new block simplifies the analysis 211297880Stuexen // Without it, backward branches could jump to a bci where no block was created 212297880Stuexen // during bytecode iteration. This would require the creation of a new block at the 213297880Stuexen // branch target and a modification of the successor lists. 214297880Stuexen BitMap bci_block_start = method()->bci_block_start(); 215297880Stuexen 216297880Stuexen ciBytecodeStream s(method()); 217297880Stuexen while (s.next() != ciBytecodeStream::EOBC()) { 218297880Stuexen int cur_bci = s.cur_bci(); 219297880Stuexen 220297880Stuexen if (bci_block_start.at(cur_bci)) { 221297880Stuexen current = make_block_at(cur_bci, current); 222297880Stuexen } 223297880Stuexen assert(current != NULL, "must have current block"); 224297880Stuexen 225297880Stuexen if (has_xhandlers && GraphBuilder::can_trap(method(), s.cur_bc())) { 226297880Stuexen handle_exceptions(current, cur_bci); 227297880Stuexen } 228297880Stuexen 229297880Stuexen switch (s.cur_bc()) { 230297880Stuexen // track stores to local variables for selective creation of phi functions 231297880Stuexen case Bytecodes::_iinc: store_one(current, s.get_index()); break; 232297880Stuexen case Bytecodes::_istore: store_one(current, s.get_index()); break; 233297880Stuexen case Bytecodes::_lstore: store_two(current, s.get_index()); break; 234297880Stuexen case Bytecodes::_fstore: store_one(current, s.get_index()); break; 235297880Stuexen case Bytecodes::_dstore: store_two(current, s.get_index()); break; 236297880Stuexen case Bytecodes::_astore: store_one(current, s.get_index()); break; 237297880Stuexen case Bytecodes::_istore_0: store_one(current, 0); break; 238297880Stuexen case Bytecodes::_istore_1: store_one(current, 1); break; 239163953Srrs case Bytecodes::_istore_2: store_one(current, 2); break; 240172091Srrs case Bytecodes::_istore_3: store_one(current, 3); break; 241163953Srrs case Bytecodes::_lstore_0: store_two(current, 0); break; 242163953Srrs case Bytecodes::_lstore_1: store_two(current, 1); break; 243163953Srrs case Bytecodes::_lstore_2: store_two(current, 2); break; 244163953Srrs case Bytecodes::_lstore_3: store_two(current, 3); break; 245297855Stuexen case Bytecodes::_fstore_0: store_one(current, 0); break; 246163953Srrs case Bytecodes::_fstore_1: store_one(current, 1); break; 247298223Stuexen case Bytecodes::_fstore_2: store_one(current, 2); break; 248298223Stuexen case Bytecodes::_fstore_3: store_one(current, 3); break; 249163953Srrs case Bytecodes::_dstore_0: store_two(current, 0); break; 250297990Stuexen case Bytecodes::_dstore_1: store_two(current, 1); break; 251297990Stuexen case Bytecodes::_dstore_2: store_two(current, 2); break; 252297990Stuexen case Bytecodes::_dstore_3: store_two(current, 3); break; 253297990Stuexen case Bytecodes::_astore_0: store_one(current, 0); break; 254297990Stuexen case Bytecodes::_astore_1: store_one(current, 1); break; 255298132Stuexen case Bytecodes::_astore_2: store_one(current, 2); break; 256163953Srrs case Bytecodes::_astore_3: store_one(current, 3); break; 257163953Srrs 258163953Srrs // track bytecodes that affect the control flow 259163953Srrs case Bytecodes::_athrow: // fall through 260163953Srrs case Bytecodes::_ret: // fall through 261163953Srrs case Bytecodes::_ireturn: // fall through 262297990Stuexen case Bytecodes::_lreturn: // fall through 263163953Srrs case Bytecodes::_freturn: // fall through 264163953Srrs case Bytecodes::_dreturn: // fall through 265163953Srrs case Bytecodes::_areturn: // fall through 266297990Stuexen case Bytecodes::_return: 267297990Stuexen current = NULL; 268297990Stuexen break; 269297990Stuexen 270297990Stuexen case Bytecodes::_ifeq: // fall through 271297990Stuexen case Bytecodes::_ifne: // fall through 272298132Stuexen case Bytecodes::_iflt: // fall through 273298132Stuexen case Bytecodes::_ifge: // fall through 274298132Stuexen case Bytecodes::_ifgt: // fall through 275298132Stuexen case Bytecodes::_ifle: // fall through 276298132Stuexen case Bytecodes::_if_icmpeq: // fall through 277298132Stuexen case Bytecodes::_if_icmpne: // fall through 278298132Stuexen case Bytecodes::_if_icmplt: // fall through 279298132Stuexen case Bytecodes::_if_icmpge: // fall through 280298132Stuexen case Bytecodes::_if_icmpgt: // fall through 281298132Stuexen case Bytecodes::_if_icmple: // fall through 282163953Srrs case Bytecodes::_if_acmpeq: // fall through 283298132Stuexen case Bytecodes::_if_acmpne: // fall through 284298132Stuexen case Bytecodes::_ifnull: // fall through 285298132Stuexen case Bytecodes::_ifnonnull: 286163953Srrs make_block_at(s.next_bci(), current); 287297990Stuexen make_block_at(s.get_dest(), current); 288297990Stuexen current = NULL; 289298132Stuexen break; 290298132Stuexen 291297990Stuexen case Bytecodes::_goto: 292297990Stuexen make_block_at(s.get_dest(), current); 293297855Stuexen current = NULL; 294297880Stuexen break; 295302138Stuexen 296297855Stuexen case Bytecodes::_goto_w: 297297855Stuexen make_block_at(s.get_far_dest(), current); 298297855Stuexen current = NULL; 299297855Stuexen break; 300297855Stuexen 301297855Stuexen case Bytecodes::_jsr: 302297855Stuexen handle_jsr(current, s.get_dest(), s.next_bci()); 303297855Stuexen current = NULL; 304297880Stuexen break; 305297855Stuexen 306297855Stuexen case Bytecodes::_jsr_w: 307297855Stuexen handle_jsr(current, s.get_far_dest(), s.next_bci()); 308297855Stuexen current = NULL; 309297990Stuexen break; 310297990Stuexen 311297990Stuexen case Bytecodes::_tableswitch: { 312297990Stuexen // set block for each case 313297990Stuexen Bytecode_tableswitch *switch_ = Bytecode_tableswitch_at(s.cur_bcp()); 314297990Stuexen int l = switch_->length(); 315297990Stuexen for (int i = 0; i < l; i++) { 316297990Stuexen make_block_at(cur_bci + switch_->dest_offset_at(i), current); 317297990Stuexen } 318297990Stuexen make_block_at(cur_bci + switch_->default_offset(), current); 319297990Stuexen current = NULL; 320297990Stuexen break; 321297990Stuexen } 322297990Stuexen 323297990Stuexen case Bytecodes::_lookupswitch: { 324297990Stuexen // set block for each case 325297990Stuexen Bytecode_lookupswitch *switch_ = Bytecode_lookupswitch_at(s.cur_bcp()); 326297990Stuexen int l = switch_->number_of_pairs(); 327297855Stuexen for (int i = 0; i < l; i++) { 328297880Stuexen make_block_at(cur_bci + switch_->pair_at(i)->offset(), current); 329297990Stuexen } 330297990Stuexen make_block_at(cur_bci + switch_->default_offset(), current); 331297990Stuexen current = NULL; 332297990Stuexen break; 333163953Srrs } 334163953Srrs } 335163953Srrs } 336163953Srrs} 337163953Srrs 338163953Srrs 339163953Srrsvoid BlockListBuilder::mark_loops() { 340209029Srrs ResourceMark rm; 341209029Srrs 342209029Srrs _active = BitMap(BlockBegin::number_of_blocks()); _active.clear(); 343163953Srrs _visited = BitMap(BlockBegin::number_of_blocks()); _visited.clear(); 344163953Srrs _loop_map = intArray(BlockBegin::number_of_blocks(), 0); 345163953Srrs _next_loop_index = 0; 346163953Srrs _next_block_number = _blocks.length(); 347163953Srrs 348221249Stuexen // recursively iterate the control flow graph 349221249Stuexen mark_loops(_bci2block->at(0), false); 350163953Srrs assert(_next_block_number >= 0, "invalid block numbers"); 351163953Srrs} 352163953Srrs 353164085Srrsvoid BlockListBuilder::make_loop_header(BlockBegin* block) { 354163953Srrs if (block->is_set(BlockBegin::exception_entry_flag)) { 355163953Srrs // exception edges may look like loops but don't mark them as such 356163953Srrs // since it screws up block ordering. 357163953Srrs return; 358164085Srrs } 359167598Srrs if (!block->is_set(BlockBegin::parser_loop_header_flag)) { 360163953Srrs block->set(BlockBegin::parser_loop_header_flag); 361168299Srrs 362167598Srrs assert(_loop_map.at(block->block_id()) == 0, "must not be set yet"); 363168299Srrs assert(0 <= _next_loop_index && _next_loop_index < BitsPerInt, "_next_loop_index is used as a bit-index in integer"); 364170587Srwatson _loop_map.at_put(block->block_id(), 1 << _next_loop_index); 365170587Srwatson if (_next_loop_index < 31) _next_loop_index++; 366163953Srrs } else { 367163953Srrs // block already marked as loop header 368164039Srwatson assert(is_power_of_2((unsigned int)_loop_map.at(block->block_id())), "exactly one bit must be set"); 369163953Srrs } 370163953Srrs} 371163953Srrs 372163953Srrsint BlockListBuilder::mark_loops(BlockBegin* block, bool in_subroutine) { 373237715Stuexen int block_id = block->block_id(); 374237715Stuexen 375167598Srrs if (_visited.at(block_id)) { 376163953Srrs if (_active.at(block_id)) { 377163953Srrs // reached block via backward branch 378163953Srrs make_loop_header(block); 379163953Srrs } 380163953Srrs // return cached loop information for this block 381164085Srrs return _loop_map.at(block_id); 382163953Srrs } 383171943Srrs 384163953Srrs if (block->is_set(BlockBegin::subroutine_entry_flag)) { 385163953Srrs in_subroutine = true; 386163953Srrs } 387163953Srrs 388164085Srrs // set active and visited bits before successors are processed 389164085Srrs _visited.set_bit(block_id); 390164085Srrs _active.set_bit(block_id); 391164085Srrs 392164085Srrs intptr_t loop_state = 0; 393164085Srrs for (int i = block->number_of_sux() - 1; i >= 0; i--) { 394164085Srrs // recursively process all successors 395164085Srrs loop_state |= mark_loops(block->sux_at(i), in_subroutine); 396164085Srrs } 397164085Srrs 398164085Srrs // clear active-bit after all successors are processed 399164085Srrs _active.clear_bit(block_id); 400164085Srrs 401164085Srrs // reverse-post-order numbering of all blocks 402164085Srrs block->set_depth_first_number(_next_block_number); 403164085Srrs _next_block_number--; 404163953Srrs 405163953Srrs if (loop_state != 0 || in_subroutine ) { 406163953Srrs // block is contained at least in one loop, so phi functions are necessary 407163953Srrs // phi functions are also necessary for all locals stored in a subroutine 408163953Srrs scope()->requires_phi_function().set_union(block->stores_to_locals()); 409163953Srrs } 410163953Srrs 411163953Srrs if (block->is_set(BlockBegin::parser_loop_header_flag)) { 412221249Stuexen int header_loop_state = _loop_map.at(block_id); 413163953Srrs assert(is_power_of_2((unsigned)header_loop_state), "exactly one bit must be set"); 414163953Srrs 415163953Srrs // If the highest bit is set (i.e. when integer value is negative), the method 416163953Srrs // has 32 or more loops. This bit is never cleared because it is used for multiple loops 417163953Srrs if (header_loop_state >= 0) { 418163953Srrs clear_bits(loop_state, header_loop_state); 419163953Srrs } 420233005Stuexen } 421163953Srrs 422171943Srrs // cache and return loop information for this block 423163953Srrs _loop_map.at_put(block_id, loop_state); 424163953Srrs return loop_state; 425163953Srrs} 426163953Srrs 427163953Srrs 428163953Srrs#ifndef PRODUCT 429163953Srrs 430163953Srrsint compare_depth_first(BlockBegin** a, BlockBegin** b) { 431163953Srrs return (*a)->depth_first_number() - (*b)->depth_first_number(); 432163953Srrs} 433169380Srrs 434169380Srrsvoid BlockListBuilder::print() { 435163953Srrs tty->print("----- initial block list of BlockListBuilder for method "); 436167695Srrs method()->print_short_name(); 437163953Srrs tty->cr(); 438163953Srrs 439163953Srrs // better readability if blocks are sorted in processing order 440163953Srrs _blocks.sort(compare_depth_first); 441167695Srrs 442167695Srrs for (int i = 0; i < _blocks.length(); i++) { 443167695Srrs BlockBegin* cur = _blocks.at(i); 444163953Srrs tty->print("%4d: B%-4d bci: %-4d preds: %-4d ", cur->depth_first_number(), cur->block_id(), cur->bci(), cur->total_preds()); 445163953Srrs 446163953Srrs tty->print(cur->is_set(BlockBegin::std_entry_flag) ? " std" : " "); 447163953Srrs tty->print(cur->is_set(BlockBegin::osr_entry_flag) ? " osr" : " "); 448163953Srrs tty->print(cur->is_set(BlockBegin::exception_entry_flag) ? " ex" : " "); 449163953Srrs tty->print(cur->is_set(BlockBegin::subroutine_entry_flag) ? " sr" : " "); 450163953Srrs tty->print(cur->is_set(BlockBegin::parser_loop_header_flag) ? " lh" : " "); 451163953Srrs 452163953Srrs if (cur->number_of_sux() > 0) { 453163953Srrs tty->print(" sux: "); 454163953Srrs for (int j = 0; j < cur->number_of_sux(); j++) { 455163953Srrs BlockBegin* sux = cur->sux_at(j); 456228653Stuexen tty->print("B%d ", sux->block_id()); 457163953Srrs } 458163953Srrs } 459163953Srrs tty->cr(); 460166086Srrs } 461170205Srrs} 462185694Srrs 463163953Srrs#endif 464298066Spfg 465171943Srrs 466228907Stuexen// A simple growable array of Values indexed by ciFields 467163953Srrsclass FieldBuffer: public CompilationResourceObj { 468184030Srrs private: 469184030Srrs GrowableArray<Value> _values; 470184030Srrs 471228907Stuexen public: 472184030Srrs FieldBuffer() {} 473163953Srrs 474170205Srrs void kill() { 475163953Srrs _values.trunc_to(0); 476228907Stuexen } 477163953Srrs 478163953Srrs Value at(ciField* field) { 479163953Srrs assert(field->holder()->is_loaded(), "must be a loaded field"); 480163953Srrs int offset = field->offset(); 481163953Srrs if (offset < _values.length()) { 482163953Srrs return _values.at(offset); 483197288Srrs } else { 484163953Srrs return NULL; 485228907Stuexen } 486163953Srrs } 487163953Srrs 488163953Srrs void at_put(ciField* field, Value value) { 489163953Srrs assert(field->holder()->is_loaded(), "must be a loaded field"); 490163953Srrs int offset = field->offset(); 491244730Stuexen _values.at_put_grow(offset, value, NULL); 492163953Srrs } 493163953Srrs 494233005Stuexen}; 495171943Srrs 496228907Stuexen 497171943Srrs// MemoryBuffer is fairly simple model of the current state of memory. 498244730Stuexen// It partitions memory into several pieces. The first piece is 499244730Stuexen// generic memory where little is known about the owner of the memory. 500244730Stuexen// This is conceptually represented by the tuple <O, F, V> which says 501244730Stuexen// that the field F of object O has value V. This is flattened so 502244730Stuexen// that F is represented by the offset of the field and the parallel 503244730Stuexen// arrays _objects and _values are used for O and V. Loads of O.F can 504244730Stuexen// simply use V. Newly allocated objects are kept in a separate list 505244730Stuexen// along with a parallel array for each object which represents the 506163953Srrs// current value of its fields. Stores of the default value to fields 507163953Srrs// which have never been stored to before are eliminated since they 508221249Stuexen// are redundant. Once newly allocated objects are stored into 509171990Srrs// another object or they are passed out of the current compile they 510163953Srrs// are treated like generic memory. 511163953Srrs 512163953Srrsclass MemoryBuffer: public CompilationResourceObj { 513163953Srrs private: 514163953Srrs FieldBuffer _values; 515163953Srrs GrowableArray<Value> _objects; 516233005Stuexen GrowableArray<Value> _newobjects; 517163953Srrs GrowableArray<FieldBuffer*> _fields; 518163953Srrs 519163953Srrs public: 520163953Srrs MemoryBuffer() {} 521163953Srrs 522163953Srrs StoreField* store(StoreField* st) { 523163953Srrs if (!EliminateFieldAccess) { 524163953Srrs return st; 525163953Srrs } 526163953Srrs 527163953Srrs Value object = st->obj(); 528163953Srrs Value value = st->value(); 529163953Srrs ciField* field = st->field(); 530275427Stuexen if (field->holder()->is_loaded()) { 531163953Srrs int offset = field->offset(); 532163953Srrs int index = _newobjects.find(object); 533163953Srrs if (index != -1) { 534169380Srrs // newly allocated object with no other stores performed on this field 535169380Srrs FieldBuffer* buf = _fields.at(index); 536163953Srrs if (buf->at(field) == NULL && is_default_value(value)) { 537163953Srrs#ifndef PRODUCT 538163953Srrs if (PrintIRDuringConstruction && Verbose) { 539163953Srrs tty->print_cr("Eliminated store for object %d:", index); 540169380Srrs st->print_line(); 541169380Srrs } 542163953Srrs#endif 543163953Srrs return NULL; 544163953Srrs } else { 545163953Srrs buf->at_put(field, value); 546163953Srrs } 547163953Srrs } else { 548167695Srrs _objects.at_put_grow(offset, object, NULL); 549163953Srrs _values.at_put(field, value); 550163953Srrs } 551163953Srrs 552163953Srrs store_value(value); 553167695Srrs } else { 554167695Srrs // if we held onto field names we could alias based on names but 555167695Srrs // we don't know what's being stored to so kill it all. 556163953Srrs kill(); 557163953Srrs } 558163953Srrs return st; 559163953Srrs } 560163953Srrs 561163953Srrs 562163953Srrs // return true if this value correspond to the default value of a field. 563163953Srrs bool is_default_value(Value value) { 564163953Srrs Constant* con = value->as_Constant(); 565163953Srrs if (con) { 566163953Srrs switch (con->type()->tag()) { 567163953Srrs case intTag: return con->type()->as_IntConstant()->value() == 0; 568163953Srrs case longTag: return con->type()->as_LongConstant()->value() == 0; 569163953Srrs case floatTag: return jint_cast(con->type()->as_FloatConstant()->value()) == 0; 570163953Srrs case doubleTag: return jlong_cast(con->type()->as_DoubleConstant()->value()) == jlong_cast(0); 571163953Srrs case objectTag: return con->type() == objectNull; 572163953Srrs default: ShouldNotReachHere(); 573163953Srrs } 574163953Srrs } 575163953Srrs return false; 576163953Srrs } 577163953Srrs 578163953Srrs 579163953Srrs // return either the actual value of a load or the load itself 580163953Srrs Value load(LoadField* load) { 581233005Stuexen if (!EliminateFieldAccess) { 582163953Srrs return load; 583163953Srrs } 584163953Srrs 585163953Srrs if (RoundFPResults && UseSSE < 2 && load->type()->is_float_kind()) { 586171943Srrs // can't skip load since value might get rounded as a side effect 587163953Srrs return load; 588228907Stuexen } 589163953Srrs 590163953Srrs ciField* field = load->field(); 591163953Srrs Value object = load->obj(); 592163953Srrs if (field->holder()->is_loaded() && !field->is_volatile()) { 593228907Stuexen int offset = field->offset(); 594163953Srrs Value result = NULL; 595163953Srrs int index = _newobjects.find(object); 596171943Srrs if (index != -1) { 597163953Srrs result = _fields.at(index)->at(field); 598163953Srrs } else if (_objects.at_grow(offset, NULL) == object) { 599163953Srrs result = _values.at(field); 600163953Srrs } 601163953Srrs if (result != NULL) { 602163953Srrs#ifndef PRODUCT 603163953Srrs if (PrintIRDuringConstruction && Verbose) { 604163953Srrs tty->print_cr("Eliminated load: "); 605163953Srrs load->print_line(); 606163953Srrs } 607163953Srrs#endif 608171943Srrs assert(result->type()->tag() == load->type()->tag(), "wrong types"); 609163953Srrs return result; 610163953Srrs } 611163953Srrs } 612163953Srrs return load; 613163953Srrs } 614163953Srrs 615223132Stuexen // Record this newly allocated object 616163953Srrs void new_instance(NewInstance* object) { 617163953Srrs int index = _newobjects.length(); 618163953Srrs _newobjects.append(object); 619163953Srrs if (_fields.at_grow(index, NULL) == NULL) { 620163953Srrs _fields.at_put(index, new FieldBuffer()); 621163953Srrs } else { 622169420Srrs _fields.at(index)->kill(); 623163953Srrs } 624163953Srrs } 625163953Srrs 626163953Srrs void store_value(Value value) { 627163953Srrs int index = _newobjects.find(value); 628163953Srrs if (index != -1) { 629163953Srrs // stored a newly allocated object into another object. 630165647Srrs // Assume we've lost track of it as separate slice of memory. 631163953Srrs // We could do better by keeping track of whether individual 632163953Srrs // fields could alias each other. 633163953Srrs _newobjects.remove_at(index); 634163953Srrs // pull out the field info and store it at the end up the list 635163953Srrs // of field info list to be reused later. 636163953Srrs _fields.append(_fields.at(index)); 637163953Srrs _fields.remove_at(index); 638163953Srrs } 639163953Srrs } 640163953Srrs 641163953Srrs void kill() { 642163953Srrs _newobjects.trunc_to(0); 643163953Srrs _objects.trunc_to(0); 644163953Srrs _values.kill(); 645163953Srrs } 646163953Srrs}; 647163953Srrs 648163953Srrs 649163953Srrs// Implementation of GraphBuilder's ScopeData 650163953Srrs 651163953SrrsGraphBuilder::ScopeData::ScopeData(ScopeData* parent) 652163953Srrs : _parent(parent) 653163953Srrs , _bci2block(NULL) 654163953Srrs , _scope(NULL) 655163953Srrs , _has_handler(false) 656163953Srrs , _stream(NULL) 657163953Srrs , _work_list(NULL) 658171990Srrs , _parsing_jsr(false) 659163953Srrs , _jsr_xhandlers(NULL) 660163953Srrs , _caller_stack_size(-1) 661163953Srrs , _continuation(NULL) 662163953Srrs , _continuation_state(NULL) 663163953Srrs , _num_returns(0) 664163953Srrs , _cleanup_block(NULL) 665171943Srrs , _cleanup_return_prev(NULL) 666163953Srrs , _cleanup_state(NULL) 667163953Srrs{ 668163953Srrs if (parent != NULL) { 669171745Srrs _max_inline_size = (intx) ((float) NestedInliningSizeRatio * (float) parent->max_inline_size() / 100.0f); 670171745Srrs } else { 671199437Stuexen _max_inline_size = MaxInlineSize; 672163953Srrs } 673163953Srrs if (_max_inline_size < MaxTrivialSize) { 674163953Srrs _max_inline_size = MaxTrivialSize; 675163953Srrs } 676163953Srrs} 677163953Srrs 678163953Srrs 679163953Srrsvoid GraphBuilder::kill_all() { 680163953Srrs if (UseLocalValueNumbering) { 681163953Srrs vmap()->kill_all(); 682171943Srrs } 683163953Srrs _memory->kill(); 684163953Srrs} 685163953Srrs 686163953Srrs 687163953SrrsBlockBegin* GraphBuilder::ScopeData::block_at(int bci) { 688163953Srrs if (parsing_jsr()) { 689163953Srrs // It is necessary to clone all blocks associated with a 690163953Srrs // subroutine, including those for exception handlers in the scope 691163953Srrs // of the method containing the jsr (because those exception 692163953Srrs // handlers may contain ret instructions in some cases). 693163953Srrs BlockBegin* block = bci2block()->at(bci); 694163953Srrs if (block != NULL && block == parent()->bci2block()->at(bci)) { 695275427Stuexen BlockBegin* new_block = new BlockBegin(block->bci()); 696163953Srrs#ifndef PRODUCT 697163953Srrs if (PrintInitialBlockList) { 698163953Srrs tty->print_cr("CFG: cloned block %d (bci %d) as block %d for jsr", 699163953Srrs block->block_id(), block->bci(), new_block->block_id()); 700163953Srrs } 701243882Sglebius#endif 702163953Srrs // copy data from cloned blocked 703163953Srrs new_block->set_depth_first_number(block->depth_first_number()); 704163953Srrs if (block->is_set(BlockBegin::parser_loop_header_flag)) new_block->set(BlockBegin::parser_loop_header_flag); 705163953Srrs // Preserve certain flags for assertion checking 706163953Srrs if (block->is_set(BlockBegin::subroutine_entry_flag)) new_block->set(BlockBegin::subroutine_entry_flag); 707163953Srrs if (block->is_set(BlockBegin::exception_entry_flag)) new_block->set(BlockBegin::exception_entry_flag); 708163953Srrs 709163953Srrs // copy was_visited_flag to allow early detection of bailouts 710165647Srrs // if a block that is used in a jsr has already been visited before, 711163953Srrs // it is shared between the normal control flow and a subroutine 712165647Srrs // BlockBegin::try_merge returns false when the flag is set, this leads 713163953Srrs // to a compilation bailout 714172090Srrs if (block->is_set(BlockBegin::was_visited_flag)) new_block->set(BlockBegin::was_visited_flag); 715163953Srrs 716163953Srrs bci2block()->at_put(bci, new_block); 717163953Srrs block = new_block; 718163953Srrs } 719163953Srrs return block; 720163953Srrs } else { 721163953Srrs return bci2block()->at(bci); 722283650Stuexen } 723283650Stuexen} 724163953Srrs 725163953Srrs 726163953SrrsXHandlers* GraphBuilder::ScopeData::xhandlers() const { 727163953Srrs if (_jsr_xhandlers == NULL) { 728163953Srrs assert(!parsing_jsr(), ""); 729163953Srrs return scope()->xhandlers(); 730163953Srrs } 731303956Stuexen assert(parsing_jsr(), ""); 732163953Srrs return _jsr_xhandlers; 733163953Srrs} 734166675Srrs 735166675Srrs 736163953Srrsvoid GraphBuilder::ScopeData::set_scope(IRScope* scope) { 737224641Stuexen _scope = scope; 738224641Stuexen bool parent_has_handler = false; 739246588Stuexen if (parent() != NULL) { 740246588Stuexen parent_has_handler = parent()->has_handler(); 741246588Stuexen } 742246588Stuexen _has_handler = parent_has_handler || scope->xhandlers()->has_handlers(); 743246588Stuexen} 744246588Stuexen 745246588Stuexen 746224641Stuexenvoid GraphBuilder::ScopeData::set_inline_cleanup_info(BlockBegin* block, 747224641Stuexen Instruction* return_prev, 748224641Stuexen ValueStack* return_state) { 749224641Stuexen _cleanup_block = block; 750224641Stuexen _cleanup_return_prev = return_prev; 751224641Stuexen _cleanup_state = return_state; 752163953Srrs} 753224641Stuexen 754163953Srrs 755224641Stuexenvoid GraphBuilder::ScopeData::add_to_work_list(BlockBegin* block) { 756246588Stuexen if (_work_list == NULL) { 757163953Srrs _work_list = new BlockList(); 758163953Srrs } 759163953Srrs 760163953Srrs if (!block->is_set(BlockBegin::is_on_work_list_flag)) { 761163953Srrs // Do not start parsing the continuation block while in a 762163953Srrs // sub-scope 763163953Srrs if (parsing_jsr()) { 764163953Srrs if (block == jsr_continuation()) { 765163953Srrs return; 766163953Srrs } 767163953Srrs } else { 768163953Srrs if (block == continuation()) { 769224641Stuexen return; 770224641Stuexen } 771224641Stuexen } 772224641Stuexen block->set(BlockBegin::is_on_work_list_flag); 773224641Stuexen _work_list->push(block); 774224641Stuexen 775224641Stuexen sort_top_into_worklist(_work_list, block); 776224641Stuexen } 777163953Srrs} 778163953Srrs 779224641Stuexen 780303956Stuexenvoid GraphBuilder::sort_top_into_worklist(BlockList* worklist, BlockBegin* top) { 781303956Stuexen assert(worklist->top() == top, ""); 782163953Srrs // sort block descending into work list 783163953Srrs const int dfn = top->depth_first_number(); 784163953Srrs assert(dfn != -1, "unknown depth first number"); 785163953Srrs int i = worklist->length()-2; 786163953Srrs while (i >= 0) { 787163953Srrs BlockBegin* b = worklist->at(i); 788163953Srrs if (b->depth_first_number() < dfn) { 789263237Stuexen worklist->at_put(i+1, b); 790165220Srrs } else { 791172090Srrs break; 792163953Srrs } 793163953Srrs i --; 794163953Srrs } 795163953Srrs if (i >= -1) worklist->at_put(i + 1, top); 796163953Srrs} 797163953Srrs 798283650Stuexenint GraphBuilder::ScopeData::caller_stack_size() const { 799283650Stuexen ValueStack* state = scope()->caller_state(); 800163953Srrs if (state == NULL) { 801171990Srrs return 0; 802172090Srrs } 803163953Srrs return state->stack_size(); 804163953Srrs} 805188067Srrs 806163953Srrs 807163953SrrsBlockBegin* GraphBuilder::ScopeData::remove_from_work_list() { 808163953Srrs if (is_work_list_empty()) { 809163953Srrs return NULL; 810163953Srrs } 811163953Srrs return _work_list->pop(); 812163953Srrs} 813163953Srrs 814171943Srrs 815228907Stuexenbool GraphBuilder::ScopeData::is_work_list_empty() const { 816163953Srrs return (_work_list == NULL || _work_list->length() == 0); 817163953Srrs} 818163953Srrs 819163953Srrs 820178202Srrsvoid GraphBuilder::ScopeData::setup_jsr_xhandlers() { 821178202Srrs assert(parsing_jsr(), ""); 822178202Srrs // clone all the exception handlers from the scope 823178202Srrs XHandlers* handlers = new XHandlers(scope()->xhandlers()); 824178202Srrs const int n = handlers->length(); 825178202Srrs for (int i = 0; i < n; i++) { 826178202Srrs // The XHandlers need to be adjusted to dispatch to the cloned 827178202Srrs // handler block instead of the default one but the synthetic 828209289Stuexen // unlocker needs to be handled specially. The synthetic unlocker 829209289Stuexen // should be left alone since there can be only one and all code 830209289Stuexen // should dispatch to the same one. 831209289Stuexen XHandler* h = handlers->handler_at(i); 832209289Stuexen assert(h->handler_bci() != SynchronizationEntryBCI, "must be real"); 833228907Stuexen h->set_entry_block(block_at(h->handler_bci())); 834209289Stuexen } 835209289Stuexen _jsr_xhandlers = handlers; 836209289Stuexen} 837209289Stuexen 838209289Stuexen 839209289Stuexenint GraphBuilder::ScopeData::num_returns() { 840209289Stuexen if (parsing_jsr()) { 841209289Stuexen return parent()->num_returns(); 842178202Srrs } 843178202Srrs return _num_returns; 844178202Srrs} 845178202Srrs 846178202Srrs 847209289Stuexenvoid GraphBuilder::ScopeData::incr_num_returns() { 848209289Stuexen if (parsing_jsr()) { 849209289Stuexen parent()->incr_num_returns(); 850209289Stuexen } else { 851209289Stuexen ++_num_returns; 852275427Stuexen } 853178202Srrs} 854178202Srrs 855178202Srrs 856178202Srrs// Implementation of GraphBuilder 857178202Srrs 858178202Srrs#define INLINE_BAILOUT(msg) { inline_bailout(msg); return false; } 859178202Srrs 860178202Srrs 861275427Stuexenvoid GraphBuilder::load_constant() { 862178202Srrs ciConstant con = stream()->get_constant(); 863178202Srrs if (con.basic_type() == T_ILLEGAL) { 864178202Srrs BAILOUT("could not resolve a constant"); 865178202Srrs } else { 866178202Srrs ValueType* t = illegalType; 867178202Srrs ValueStack* patch_state = NULL; 868178202Srrs switch (con.basic_type()) { 869178202Srrs case T_BOOLEAN: t = new IntConstant (con.as_boolean()); break; 870163953Srrs case T_BYTE : t = new IntConstant (con.as_byte ()); break; 871163953Srrs case T_CHAR : t = new IntConstant (con.as_char ()); break; 872163953Srrs case T_SHORT : t = new IntConstant (con.as_short ()); break; 873163953Srrs case T_INT : t = new IntConstant (con.as_int ()); break; 874163953Srrs case T_LONG : t = new LongConstant (con.as_long ()); break; 875233005Stuexen case T_FLOAT : t = new FloatConstant (con.as_float ()); break; 876171943Srrs case T_DOUBLE : t = new DoubleConstant (con.as_double ()); break; 877228907Stuexen case T_ARRAY : t = new ArrayConstant (con.as_object ()->as_array ()); break; 878163953Srrs case T_OBJECT : 879163953Srrs { 880163953Srrs ciObject* obj = con.as_object(); 881243558Stuexen if (obj->is_klass()) { 882243558Stuexen ciKlass* klass = obj->as_klass(); 883163953Srrs if (!klass->is_loaded() || PatchALot) { 884204096Stuexen patch_state = state()->copy(); 885163953Srrs t = new ObjectConstant(obj); 886204096Stuexen } else { 887163953Srrs t = new InstanceConstant(klass->java_mirror()); 888163953Srrs } 889171943Srrs } else { 890163953Srrs t = new InstanceConstant(obj->as_instance()); 891291078Stuexen } 892291078Stuexen break; 893291078Stuexen } 894291078Stuexen default : ShouldNotReachHere(); 895291078Stuexen } 896291078Stuexen Value x; 897163953Srrs if (patch_state != NULL) { 898163953Srrs x = new Constant(t, patch_state); 899291078Stuexen } else { 900163953Srrs x = new Constant(t); 901188067Srrs } 902188067Srrs push(t, append(x)); 903188067Srrs } 904188067Srrs} 905188067Srrs 906163953Srrs 907163953Srrsvoid GraphBuilder::load_local(ValueType* type, int index) { 908163953Srrs Value x = state()->load_local(index); 909163953Srrs push(type, x); 910163953Srrs} 911291078Stuexen 912163953Srrs 913163953Srrsvoid GraphBuilder::store_local(ValueType* type, int index) { 914163953Srrs Value x = pop(type); 915168299Srrs store_local(state(), x, type, index); 916163953Srrs} 917163953Srrs 918163953Srrs 919163953Srrsvoid GraphBuilder::store_local(ValueStack* state, Value x, ValueType* type, int index) { 920291078Stuexen if (parsing_jsr()) { 921291078Stuexen // We need to do additional tracking of the location of the return 922291078Stuexen // address for jsrs since we don't handle arbitrary jsr/ret 923291078Stuexen // constructs. Here we are figuring out in which circumstances we 924291078Stuexen // need to bail out. 925291078Stuexen if (x->type()->is_address()) { 926291078Stuexen scope_data()->set_jsr_return_address_local(index); 927291078Stuexen 928291078Stuexen // Also check parent jsrs (if any) at this time to see whether 929291078Stuexen // they are using this local. We don't handle skipping over a 930291078Stuexen // ret. 931291078Stuexen for (ScopeData* cur_scope_data = scope_data()->parent(); 932291078Stuexen cur_scope_data != NULL && cur_scope_data->parsing_jsr() && cur_scope_data->scope() == scope(); 933291078Stuexen cur_scope_data = cur_scope_data->parent()) { 934291078Stuexen if (cur_scope_data->jsr_return_address_local() == index) { 935291078Stuexen BAILOUT("subroutine overwrites return address from previous subroutine"); 936291078Stuexen } 937291078Stuexen } 938291078Stuexen } else if (index == scope_data()->jsr_return_address_local()) { 939291078Stuexen scope_data()->set_jsr_return_address_local(-1); 940291078Stuexen } 941291137Stuexen } 942291137Stuexen 943163953Srrs state->store_local(index, round_fp(x)); 944163953Srrs} 945303956Stuexen 946163953Srrs 947163953Srrsvoid GraphBuilder::load_indexed(BasicType type) { 948163953Srrs Value index = ipop(); 949291137Stuexen Value array = apop(); 950291078Stuexen Value length = NULL; 951291078Stuexen if (CSEArrayLength || 952291078Stuexen (array->as_AccessField() && array->as_AccessField()->field()->is_constant()) || 953291078Stuexen (array->as_NewArray() && array->as_NewArray()->length() && array->as_NewArray()->length()->type()->is_constant())) { 954291078Stuexen length = append(new ArrayLength(array, lock_stack())); 955291078Stuexen } 956163953Srrs push(as_ValueType(type), append(new LoadIndexed(array, index, length, type, lock_stack()))); 957163953Srrs} 958291078Stuexen 959291078Stuexen 960163953Srrsvoid GraphBuilder::store_indexed(BasicType type) { 961291078Stuexen Value value = pop(as_ValueType(type)); 962303956Stuexen Value index = ipop(); 963303956Stuexen Value array = apop(); 964163953Srrs Value length = NULL; 965163953Srrs if (CSEArrayLength || 966163953Srrs (array->as_AccessField() && array->as_AccessField()->field()->is_constant()) || 967163953Srrs (array->as_NewArray() && array->as_NewArray()->length() && array->as_NewArray()->length()->type()->is_constant())) { 968163953Srrs length = append(new ArrayLength(array, lock_stack())); 969163953Srrs } 970163953Srrs StoreIndexed* result = new StoreIndexed(array, index, length, type, value, lock_stack()); 971263237Stuexen append(result); 972165220Srrs _memory->store_value(value); 973163953Srrs} 974172090Srrs 975291078Stuexen 976291078Stuexenvoid GraphBuilder::stack_op(Bytecodes::Code code) { 977163953Srrs switch (code) { 978163953Srrs case Bytecodes::_pop: 979291078Stuexen { state()->raw_pop(); 980291078Stuexen } 981291078Stuexen break; 982291078Stuexen case Bytecodes::_pop2: 983291078Stuexen { state()->raw_pop(); 984291078Stuexen state()->raw_pop(); 985163953Srrs } 986291078Stuexen break; 987291078Stuexen case Bytecodes::_dup: 988163953Srrs { Value w = state()->raw_pop(); 989163953Srrs state()->raw_push(w); 990163953Srrs state()->raw_push(w); 991163953Srrs } 992163953Srrs break; 993163953Srrs case Bytecodes::_dup_x1: 994163953Srrs { Value w1 = state()->raw_pop(); 995163953Srrs Value w2 = state()->raw_pop(); 996163953Srrs state()->raw_push(w1); 997163953Srrs state()->raw_push(w2); 998178251Srrs state()->raw_push(w1); 999163953Srrs } 1000163953Srrs break; 1001163953Srrs case Bytecodes::_dup_x2: 1002163953Srrs { Value w1 = state()->raw_pop(); 1003178251Srrs Value w2 = state()->raw_pop(); 1004163953Srrs Value w3 = state()->raw_pop(); 1005163953Srrs state()->raw_push(w1); 1006163953Srrs state()->raw_push(w3); 1007163953Srrs state()->raw_push(w2); 1008163953Srrs state()->raw_push(w1); 1009163953Srrs } 1010172091Srrs break; 1011172091Srrs case Bytecodes::_dup2: 1012172091Srrs { Value w1 = state()->raw_pop(); 1013166675Srrs Value w2 = state()->raw_pop(); 1014168124Srrs state()->raw_push(w2); 1015163953Srrs state()->raw_push(w1); 1016166675Srrs state()->raw_push(w2); 1017167598Srrs state()->raw_push(w1); 1018167598Srrs } 1019163953Srrs break; 1020167598Srrs case Bytecodes::_dup2_x1: 1021167598Srrs { Value w1 = state()->raw_pop(); 1022166675Srrs Value w2 = state()->raw_pop(); 1023257555Stuexen Value w3 = state()->raw_pop(); 1024257555Stuexen state()->raw_push(w2); 1025257555Stuexen state()->raw_push(w1); 1026257555Stuexen state()->raw_push(w3); 1027257555Stuexen state()->raw_push(w2); 1028257555Stuexen state()->raw_push(w1); 1029257555Stuexen } 1030257555Stuexen break; 1031257555Stuexen case Bytecodes::_dup2_x2: 1032257555Stuexen { Value w1 = state()->raw_pop(); 1033167598Srrs Value w2 = state()->raw_pop(); 1034163953Srrs Value w3 = state()->raw_pop(); 1035163953Srrs Value w4 = state()->raw_pop(); 1036163953Srrs state()->raw_push(w2); 1037163953Srrs state()->raw_push(w1); 1038163953Srrs state()->raw_push(w4); 1039163953Srrs state()->raw_push(w3); 1040163953Srrs state()->raw_push(w2); 1041246595Stuexen state()->raw_push(w1); 1042257555Stuexen } 1043246595Stuexen break; 1044257555Stuexen case Bytecodes::_swap: 1045257555Stuexen { Value w1 = state()->raw_pop(); 1046257555Stuexen Value w2 = state()->raw_pop(); 1047246595Stuexen state()->raw_push(w1); 1048246595Stuexen state()->raw_push(w2); 1049246595Stuexen } 1050257555Stuexen break; 1051163953Srrs default: 1052246595Stuexen ShouldNotReachHere(); 1053246595Stuexen break; 1054257555Stuexen } 1055246595Stuexen} 1056257555Stuexen 1057257555Stuexen 1058246595Stuexenvoid GraphBuilder::arithmetic_op(ValueType* type, Bytecodes::Code code, ValueStack* stack) { 1059246595Stuexen Value y = pop(type); 1060257555Stuexen Value x = pop(type); 1061246595Stuexen // NOTE: strictfp can be queried from current method since we don't 1062257555Stuexen // inline methods with differing strictfp bits 1063246595Stuexen Value res = new ArithmeticOp(code, x, y, method()->is_strict(), stack); 1064257555Stuexen // Note: currently single-precision floating-point rounding on Intel is handled at the LIRGenerator level 1065257555Stuexen res = append(res); 1066246595Stuexen if (method()->is_strict()) { 1067246595Stuexen res = round_fp(res); 1068246595Stuexen } 1069246595Stuexen push(type, res); 1070246595Stuexen} 1071257555Stuexen 1072246595Stuexen 1073257555Stuexenvoid GraphBuilder::negate_op(ValueType* type) { 1074246595Stuexen push(type, append(new NegateOp(pop(type)))); 1075257555Stuexen} 1076257555Stuexen 1077163953Srrs 1078257555Stuexenvoid GraphBuilder::shift_op(ValueType* type, Bytecodes::Code code) { 1079163953Srrs Value s = ipop(); 1080163953Srrs Value x = pop(type); 1081167598Srrs // try to simplify 1082167598Srrs // Note: This code should go into the canonicalizer as soon as it can 1083167598Srrs // can handle canonicalized forms that contain more than one node. 1084167598Srrs if (CanonicalizeNodes && code == Bytecodes::_iushr) { 1085163953Srrs // pattern: x >>> s 1086167598Srrs IntConstant* s1 = s->type()->as_IntConstant(); 1087163953Srrs if (s1 != NULL) { 1088167598Srrs // pattern: x >>> s1, with s1 constant 1089163953Srrs ShiftOp* l = x->as_ShiftOp(); 1090163953Srrs if (l != NULL && l->op() == Bytecodes::_ishl) { 1091163953Srrs // pattern: (a << b) >>> s1 1092167598Srrs IntConstant* s0 = l->y()->type()->as_IntConstant(); 1093163953Srrs if (s0 != NULL) { 1094163953Srrs // pattern: (a << s0) >>> s1 1095163953Srrs const int s0c = s0->value() & 0x1F; // only the low 5 bits are significant for shifts 1096163953Srrs const int s1c = s1->value() & 0x1F; // only the low 5 bits are significant for shifts 1097163953Srrs if (s0c == s1c) { 1098163953Srrs if (s0c == 0) { 1099163953Srrs // pattern: (a << 0) >>> 0 => simplify to: a 1100163953Srrs ipush(l->x()); 1101163953Srrs } else { 1102163953Srrs // pattern: (a << s0c) >>> s0c => simplify to: a & m, with m constant 1103167598Srrs assert(0 < s0c && s0c < BitsPerInt, "adjust code below to handle corner cases"); 1104163953Srrs const int m = (1 << (BitsPerInt - s0c)) - 1; 1105163953Srrs Value s = append(new Constant(new IntConstant(m))); 1106163953Srrs ipush(append(new LogicOp(Bytecodes::_iand, l->x(), s))); 1107178251Srrs } 1108221249Stuexen return; 1109178251Srrs } 1110178251Srrs } 1111178251Srrs } 1112163953Srrs } 1113271221Stuexen } 1114178251Srrs // could not simplify 1115178251Srrs push(type, append(new ShiftOp(code, x, s))); 1116178251Srrs} 1117178251Srrs 1118178251Srrs 1119178251Srrsvoid GraphBuilder::logic_op(ValueType* type, Bytecodes::Code code) { 1120178251Srrs Value y = pop(type); 1121178251Srrs Value x = pop(type); 1122267674Stuexen push(type, append(new LogicOp(code, x, y))); 1123267674Stuexen} 1124267674Stuexen 1125267674Stuexen 1126178251Srrsvoid GraphBuilder::compare_op(ValueType* type, Bytecodes::Code code) { 1127178251Srrs ValueStack* state_before = state()->copy(); 1128178251Srrs Value y = pop(type); 1129178251Srrs Value x = pop(type); 1130178251Srrs ipush(append(new CompareOp(code, x, y, state_before))); 1131178251Srrs} 1132178251Srrs 1133178251Srrs 1134178251Srrsvoid GraphBuilder::convert(Bytecodes::Code op, BasicType from, BasicType to) { 1135178251Srrs push(as_ValueType(to), append(new Convert(op, pop(as_ValueType(from)), as_ValueType(to)))); 1136178251Srrs} 1137178251Srrs 1138178251Srrs 1139178251Srrsvoid GraphBuilder::increment() { 1140178251Srrs int index = stream()->get_index(); 1141178251Srrs int delta = stream()->is_wide() ? (signed short)Bytes::get_Java_u2(stream()->cur_bcp() + 4) : (signed char)(stream()->cur_bcp()[2]); 1142178251Srrs load_local(intType, index); 1143178251Srrs ipush(append(new Constant(new IntConstant(delta)))); 1144178251Srrs arithmetic_op(intType, Bytecodes::_iadd); 1145178251Srrs store_local(intType, index); 1146178251Srrs} 1147178251Srrs 1148178251Srrs 1149163953Srrsvoid GraphBuilder::_goto(int from_bci, int to_bci) { 1150163953Srrs profile_bci(from_bci); 1151178251Srrs append(new Goto(block_at(to_bci), to_bci <= from_bci)); 1152221249Stuexen} 1153178251Srrs 1154178251Srrs 1155178251Srrsvoid GraphBuilder::if_node(Value x, If::Condition cond, Value y, ValueStack* state_before) { 1156178251Srrs BlockBegin* tsux = block_at(stream()->get_dest()); 1157163953Srrs BlockBegin* fsux = block_at(stream()->next_bci()); 1158271221Stuexen bool is_bb = tsux->bci() < stream()->cur_bci() || fsux->bci() < stream()->cur_bci(); 1159178251Srrs If* if_node = append(new If(x, cond, false, y, tsux, fsux, is_bb ? state_before : NULL, is_bb))->as_If(); 1160178251Srrs if (profile_branches() && (if_node != NULL)) { 1161178251Srrs if_node->set_profiled_method(method()); 1162178251Srrs if_node->set_profiled_bci(bci()); 1163178251Srrs if_node->set_should_profile(true); 1164178251Srrs } 1165163953Srrs} 1166178251Srrs 1167267674Stuexen 1168267674Stuexenvoid GraphBuilder::if_zero(ValueType* type, If::Condition cond) { 1169267674Stuexen Value y = append(new Constant(intZero)); 1170267674Stuexen ValueStack* state_before = state()->copy(); 1171178251Srrs Value x = ipop(); 1172178251Srrs if_node(x, cond, y, state_before); 1173163953Srrs} 1174178251Srrs 1175178251Srrs 1176178251Srrsvoid GraphBuilder::if_null(ValueType* type, If::Condition cond) { 1177178251Srrs Value y = append(new Constant(objectNull)); 1178178251Srrs ValueStack* state_before = state()->copy(); 1179178251Srrs Value x = apop(); 1180178251Srrs if_node(x, cond, y, state_before); 1181178251Srrs} 1182178251Srrs 1183178251Srrs 1184178251Srrsvoid GraphBuilder::if_same(ValueType* type, If::Condition cond) { 1185178251Srrs ValueStack* state_before = state()->copy(); 1186178251Srrs Value y = pop(type); 1187178251Srrs Value x = pop(type); 1188178251Srrs if_node(x, cond, y, state_before); 1189178251Srrs} 1190178251Srrs 1191178251Srrs 1192163953Srrsvoid GraphBuilder::jsr(int dest) { 1193178251Srrs // We only handle well-formed jsrs (those which are "block-structured"). 1194178251Srrs // If the bytecodes are strange (jumping out of a jsr block) then we 1195178251Srrs // might end up trying to re-parse a block containing a jsr which 1196178251Srrs // has already been activated. Watch for this case and bail out. 1197178251Srrs for (ScopeData* cur_scope_data = scope_data(); 1198178251Srrs cur_scope_data != NULL && cur_scope_data->parsing_jsr() && cur_scope_data->scope() == scope(); 1199178251Srrs cur_scope_data = cur_scope_data->parent()) { 1200178251Srrs if (cur_scope_data->jsr_entry_bci() == dest) { 1201178251Srrs BAILOUT("too-complicated jsr/ret structure"); 1202178251Srrs } 1203178251Srrs } 1204178251Srrs 1205163953Srrs push(addressType, append(new Constant(new AddressConstant(next_bci())))); 1206163953Srrs if (!try_inline_jsr(dest)) { 1207178251Srrs return; // bailed out while parsing and inlining subroutine 1208178251Srrs } 1209178251Srrs} 1210178251Srrs 1211178251Srrs 1212163953Srrsvoid GraphBuilder::ret(int local_index) { 1213163953Srrs if (!parsing_jsr()) BAILOUT("ret encountered while not parsing subroutine"); 1214163953Srrs 1215163953Srrs if (local_index != scope_data()->jsr_return_address_local()) { 1216163953Srrs BAILOUT("can not handle complicated jsr/ret constructs"); 1217163953Srrs } 1218167598Srrs 1219167598Srrs // Rets simply become (NON-SAFEPOINT) gotos to the jsr continuation 1220167598Srrs append(new Goto(scope_data()->jsr_continuation(), false)); 1221163953Srrs} 1222163953Srrs 1223163953Srrs 1224167598Srrsvoid GraphBuilder::table_switch() { 1225167598Srrs Bytecode_tableswitch* switch_ = Bytecode_tableswitch_at(method()->code() + bci()); 1226246595Stuexen const int l = switch_->length(); 1227246595Stuexen if (CanonicalizeNodes && l == 1) { 1228246595Stuexen // total of 2 successors => use If instead of switch 1229246595Stuexen // Note: This code should go into the canonicalizer as soon as it can 1230246595Stuexen // can handle canonicalized forms that contain more than one node. 1231246595Stuexen Value key = append(new Constant(new IntConstant(switch_->low_key()))); 1232246595Stuexen BlockBegin* tsux = block_at(bci() + switch_->dest_offset_at(0)); 1233246595Stuexen BlockBegin* fsux = block_at(bci() + switch_->default_offset()); 1234246595Stuexen bool is_bb = tsux->bci() < bci() || fsux->bci() < bci(); 1235246595Stuexen ValueStack* state_before = is_bb ? state() : NULL; 1236246595Stuexen append(new If(ipop(), If::eql, true, key, tsux, fsux, state_before, is_bb)); 1237246595Stuexen } else { 1238246595Stuexen // collect successors 1239246595Stuexen BlockList* sux = new BlockList(l + 1, NULL); 1240246595Stuexen int i; 1241167598Srrs bool has_bb = false; 1242167598Srrs for (i = 0; i < l; i++) { 1243167598Srrs sux->at_put(i, block_at(bci() + switch_->dest_offset_at(i))); 1244167598Srrs if (switch_->dest_offset_at(i) < 0) has_bb = true; 1245167598Srrs } 1246163953Srrs // add default successor 1247163953Srrs sux->at_put(i, block_at(bci() + switch_->default_offset())); 1248163953Srrs ValueStack* state_before = has_bb ? state() : NULL; 1249163953Srrs append(new TableSwitch(ipop(), sux, switch_->low_key(), state_before, has_bb)); 1250163953Srrs } 1251163953Srrs} 1252168124Srrs 1253168124Srrs 1254168124Srrsvoid GraphBuilder::lookup_switch() { 1255168124Srrs Bytecode_lookupswitch* switch_ = Bytecode_lookupswitch_at(method()->code() + bci()); 1256168124Srrs const int l = switch_->number_of_pairs(); 1257168124Srrs if (CanonicalizeNodes && l == 1) { 1258168124Srrs // total of 2 successors => use If instead of switch 1259168124Srrs // Note: This code should go into the canonicalizer as soon as it can 1260172218Srrs // can handle canonicalized forms that contain more than one node. 1261168124Srrs // simplify to If 1262168124Srrs LookupswitchPair* pair = switch_->pair_at(0); 1263168124Srrs Value key = append(new Constant(new IntConstant(pair->match()))); 1264172218Srrs BlockBegin* tsux = block_at(bci() + pair->offset()); 1265168124Srrs BlockBegin* fsux = block_at(bci() + switch_->default_offset()); 1266168124Srrs bool is_bb = tsux->bci() < bci() || fsux->bci() < bci(); 1267168124Srrs ValueStack* state_before = is_bb ? state() : NULL; 1268172091Srrs append(new If(ipop(), If::eql, true, key, tsux, fsux, state_before, is_bb)); 1269172091Srrs } else { 1270172091Srrs // collect successors & keys 1271163953Srrs BlockList* sux = new BlockList(l + 1, NULL); 1272168124Srrs intArray* keys = new intArray(l, 0); 1273163953Srrs int i; 1274163953Srrs bool has_bb = false; 1275167598Srrs for (i = 0; i < l; i++) { 1276163953Srrs LookupswitchPair* pair = switch_->pair_at(i); 1277163953Srrs if (pair->offset() < 0) has_bb = true; 1278163953Srrs sux->at_put(i, block_at(bci() + pair->offset())); 1279163953Srrs keys->at_put(i, pair->match()); 1280163953Srrs } 1281163953Srrs // add default successor 1282163953Srrs sux->at_put(i, block_at(bci() + switch_->default_offset())); 1283163953Srrs ValueStack* state_before = has_bb ? state() : NULL; 1284167598Srrs append(new LookupSwitch(ipop(), sux, keys, state_before, has_bb)); 1285167598Srrs } 1286167598Srrs} 1287167598Srrs 1288163953Srrsvoid GraphBuilder::call_register_finalizer() { 1289167598Srrs // If the receiver requires finalization then emit code to perform 1290167598Srrs // the registration on return. 1291163953Srrs 1292167598Srrs // Gather some type information about the receiver 1293167598Srrs Value receiver = state()->load_local(0); 1294163953Srrs assert(receiver != NULL, "must have a receiver"); 1295221249Stuexen ciType* declared_type = receiver->declared_type(); 1296221249Stuexen ciType* exact_type = receiver->exact_type(); 1297221249Stuexen if (exact_type == NULL && 1298275567Stuexen receiver->as_Local() && 1299178251Srrs receiver->as_Local()->java_index() == 0) { 1300163953Srrs ciInstanceKlass* ik = compilation()->method()->holder(); 1301163953Srrs if (ik->is_final()) { 1302163953Srrs exact_type = ik; 1303275567Stuexen } else if (UseCHA && !(ik->has_subklass() || ik->is_interface())) { 1304275567Stuexen // test class is leaf class 1305275567Stuexen compilation()->dependency_recorder()->assert_leaf_type(ik); 1306221249Stuexen exact_type = ik; 1307221249Stuexen } else { 1308221249Stuexen declared_type = ik; 1309221249Stuexen } 1310163953Srrs } 1311221249Stuexen 1312221249Stuexen // see if we know statically that registration isn't required 1313221249Stuexen bool needs_check = true; 1314221249Stuexen if (exact_type != NULL) { 1315221249Stuexen needs_check = exact_type->as_instance_klass()->has_finalizer(); 1316163953Srrs } else if (declared_type != NULL) { 1317163953Srrs ciInstanceKlass* ik = declared_type->as_instance_klass(); 1318163953Srrs if (!Dependencies::has_finalizable_subclass(ik)) { 1319163953Srrs compilation()->dependency_recorder()->assert_has_no_finalizable_subclasses(ik); 1320163953Srrs needs_check = false; 1321163953Srrs } 1322221249Stuexen } 1323221249Stuexen 1324221249Stuexen if (needs_check) { 1325275567Stuexen // Perform the registration of finalizable objects. 1326178251Srrs load_local(objectType, 0); 1327163953Srrs append_split(new Intrinsic(voidType, vmIntrinsics::_Object_init, 1328163953Srrs state()->pop_arguments(1), 1329163953Srrs true, lock_stack(), true)); 1330275567Stuexen } 1331275567Stuexen} 1332275567Stuexen 1333221249Stuexen 1334221249Stuexenvoid GraphBuilder::method_return(Value x) { 1335221249Stuexen if (RegisterFinalizersAtInit && 1336221249Stuexen method()->intrinsic_id() == vmIntrinsics::_Object_init) { 1337163953Srrs call_register_finalizer(); 1338221249Stuexen } 1339221249Stuexen 1340221249Stuexen // Check to see whether we are inlining. If so, Return 1341221249Stuexen // instructions become Gotos to the continuation point. 1342221249Stuexen if (continuation() != NULL) { 1343163953Srrs assert(!method()->is_synchronized() || InlineSynchronizedMethods, "can not inline synchronized methods yet"); 1344163953Srrs 1345163953Srrs // If the inlined method is synchronized, the monitor must be 1346163953Srrs // released before we jump to the continuation block. 1347163953Srrs if (method()->is_synchronized()) { 1348168124Srrs int i = state()->caller_state()->locks_size(); 1349168124Srrs assert(state()->locks_size() == i + 1, "receiver must be locked here"); 1350168124Srrs monitorexit(state()->lock_at(i), SynchronizationEntryBCI); 1351168124Srrs } 1352166675Srrs 1353172218Srrs state()->truncate_stack(caller_stack_size()); 1354168124Srrs if (x != NULL) { 1355168124Srrs state()->push(x->type(), x); 1356172218Srrs } 1357168124Srrs Goto* goto_callee = new Goto(continuation(), false); 1358168124Srrs 1359168124Srrs // See whether this is the first return; if so, store off some 1360163953Srrs // of the state for later examination 1361166675Srrs if (num_returns() == 0) { 1362166675Srrs set_inline_cleanup_info(_block, _last, state()); 1363163953Srrs } 1364163953Srrs 1365163953Srrs // State at end of inlined method is the state of the caller 1366163953Srrs // without the method parameters on stack, including the 1367163953Srrs // return value, if any, of the inlined method on operand stack. 1368297312Stuexen set_state(scope_data()->continuation_state()->copy()); 1369167598Srrs if (x) { 1370170056Srrs state()->push(x->type(), x); 1371167598Srrs } 1372163953Srrs 1373169420Srrs // The current bci() is in the wrong scope, so use the bci() of 1374163953Srrs // the continuation point. 1375163953Srrs append_with_bci(goto_callee, scope_data()->continuation()->bci()); 1376163953Srrs incr_num_returns(); 1377163953Srrs 1378171943Srrs return; 1379163953Srrs } 1380163953Srrs 1381181054Srrs state()->truncate_stack(0); 1382181054Srrs if (method()->is_synchronized()) { 1383171943Srrs // perform the unlocking before exiting the method 1384163953Srrs Value receiver; 1385163953Srrs if (!method()->is_static()) { 1386163953Srrs receiver = _initial_state->local_at(0); 1387163953Srrs } else { 1388163953Srrs receiver = append(new Constant(new ClassConstant(method()->holder()))); 1389163953Srrs } 1390163953Srrs append_split(new MonitorExit(receiver, state()->unlock())); 1391163953Srrs } 1392171943Srrs 1393163953Srrs append(new Return(x)); 1394163953Srrs} 1395163953Srrs 1396163953Srrs 1397163953Srrsvoid GraphBuilder::access_field(Bytecodes::Code code) { 1398163953Srrs bool will_link; 1399163953Srrs ciField* field = stream()->get_field(will_link); 1400171943Srrs ciInstanceKlass* holder = field->holder(); 1401163953Srrs BasicType field_type = field->type()->basic_type(); 1402163953Srrs ValueType* type = as_ValueType(field_type); 1403163953Srrs // call will_link again to determine if the field is valid. 1404297312Stuexen const bool is_loaded = holder->is_loaded() && 1405163953Srrs field->will_link(method()->holder(), code); 1406163953Srrs const bool is_initialized = is_loaded && holder->is_initialized(); 1407297312Stuexen 1408170056Srrs ValueStack* state_copy = NULL; 1409169352Srrs if (!is_initialized || PatchALot) { 1410169352Srrs // save state before instruction for debug info when 1411169352Srrs // deoptimization happens during patching 1412170931Srrs state_copy = state()->copy(); 1413170931Srrs } 1414171943Srrs 1415171943Srrs Value obj = NULL; 1416170056Srrs if (code == Bytecodes::_getstatic || code == Bytecodes::_putstatic) { 1417171943Srrs // commoning of class constants should only occur if the class is 1418169352Srrs // fully initialized and resolved in this constant pool. The will_link test 1419163953Srrs // above essentially checks if this class is resolved in this constant pool 1420163953Srrs // so, the is_initialized flag should be suffiect. 1421163953Srrs if (state_copy != NULL) { 1422163953Srrs // build a patching constant 1423163953Srrs obj = new Constant(new ClassConstant(holder), state_copy); 1424163953Srrs } else { 1425163953Srrs obj = new Constant(new ClassConstant(holder)); 1426163953Srrs } 1427163953Srrs } 1428163953Srrs 1429163953Srrs 1430163953Srrs const int offset = is_loaded ? field->offset() : -1; 1431166023Srrs switch (code) { 1432163953Srrs case Bytecodes::_getstatic: { 1433163953Srrs // check for compile-time constants, i.e., initialized static final fields 1434163953Srrs Instruction* constant = NULL; 1435163953Srrs if (field->is_constant() && !PatchALot) { 1436171943Srrs ciConstant field_val = field->constant_value(); 1437163953Srrs BasicType field_type = field_val.basic_type(); 1438163953Srrs switch (field_type) { 1439163953Srrs case T_ARRAY: 1440163953Srrs case T_OBJECT: 1441163953Srrs if (field_val.as_object()->should_be_constant()) { 1442163953Srrs constant = new Constant(as_ValueType(field_val)); 1443163953Srrs } 1444163953Srrs break; 1445171572Srrs 1446163953Srrs default: 1447163953Srrs constant = new Constant(as_ValueType(field_val)); 1448163953Srrs } 1449163953Srrs } 1450167695Srrs if (constant != NULL) { 1451167695Srrs push(type, append(constant)); 1452167695Srrs state_copy = NULL; // Not a potential deoptimization point (see set_state_before logic below) 1453181054Srrs } else { 1454163953Srrs push(type, append(new LoadField(append(obj), offset, field, true, 1455206137Stuexen lock_stack(), state_copy, is_loaded, is_initialized))); 1456291904Stuexen } 1457298902Stuexen break; 1458171531Srrs } 1459171531Srrs case Bytecodes::_putstatic: 1460163953Srrs { Value val = pop(type); 1461163953Srrs append(new StoreField(append(obj), offset, field, val, true, lock_stack(), state_copy, is_loaded, is_initialized)); 1462163953Srrs } 1463163953Srrs break; 1464225559Stuexen case Bytecodes::_getfield : 1465225559Stuexen { 1466225559Stuexen LoadField* load = new LoadField(apop(), offset, field, false, lock_stack(), state_copy, is_loaded, true); 1467225559Stuexen Value replacement = is_loaded ? _memory->load(load) : load; 1468225559Stuexen if (replacement != load) { 1469171943Srrs assert(replacement->bci() != -99 || replacement->as_Phi() || replacement->as_Local(), 1470163953Srrs "should already by linked"); 1471221249Stuexen push(type, replacement); 1472221249Stuexen } else { 1473221249Stuexen push(type, append(load)); 1474163953Srrs } 1475221249Stuexen break; 1476221249Stuexen } 1477221249Stuexen 1478221249Stuexen case Bytecodes::_putfield : 1479163953Srrs { Value val = pop(type); 1480221249Stuexen StoreField* store = new StoreField(apop(), offset, field, val, false, lock_stack(), state_copy, is_loaded, true); 1481221249Stuexen if (is_loaded) store = _memory->store(store); 1482221249Stuexen if (store != NULL) { 1483221249Stuexen append(store); 1484221249Stuexen } 1485163953Srrs } 1486170056Srrs break; 1487223132Stuexen default : 1488167598Srrs ShouldNotReachHere(); 1489170056Srrs break; 1490283650Stuexen } 1491283650Stuexen} 1492170056Srrs 1493170056Srrs 1494167598SrrsDependencies* GraphBuilder::dependency_recorder() const { 1495167598Srrs assert(DeoptC1, "need debug information"); 1496163953Srrs return compilation()->dependency_recorder(); 1497163953Srrs} 1498163953Srrs 1499163953Srrs 1500163953Srrsvoid GraphBuilder::invoke(Bytecodes::Code code) { 1501163953Srrs bool will_link; 1502163953Srrs ciMethod* target = stream()->get_method(will_link); 1503163953Srrs // we have to make sure the argument size (incl. the receiver) 1504163953Srrs // is correct for compilation (the call would fail later during 1505169378Srrs // linkage anyway) - was bug (gri 7/28/99) 1506172090Srrs if (target->is_loaded() && target->is_static() != (code == Bytecodes::_invokestatic)) BAILOUT("will cause link error"); 1507163953Srrs ciInstanceKlass* klass = target->holder(); 1508163953Srrs 1509163953Srrs // check if CHA possible: if so, change the code to invoke_special 1510163953Srrs ciInstanceKlass* calling_klass = method()->holder(); 1511163953Srrs ciKlass* holder = stream()->get_declared_method_holder(); 1512163953Srrs ciInstanceKlass* callee_holder = ciEnv::get_instance_klass_for_declared_method_holder(holder); 1513163953Srrs ciInstanceKlass* actual_recv = callee_holder; 1514163953Srrs 1515169655Srrs // some methods are obviously bindable without any type checks so 1516163953Srrs // convert them directly to an invokespecial. 1517169655Srrs if (target->is_loaded() && !target->is_abstract() && 1518163953Srrs target->can_be_statically_bound() && code == Bytecodes::_invokevirtual) { 1519228907Stuexen code = Bytecodes::_invokespecial; 1520163953Srrs } 1521163953Srrs 1522169420Srrs // NEEDS_CLEANUP 1523169655Srrs // I've added the target-is_loaded() test below but I don't really understand 1524169655Srrs // how klass->is_loaded() can be true and yet target->is_loaded() is false. 1525166675Srrs // this happened while running the JCK invokevirtual tests under doit. TKR 1526166675Srrs ciMethod* cha_monomorphic_target = NULL; 1527169655Srrs ciMethod* exact_target = NULL; 1528166675Srrs if (UseCHA && DeoptC1 && klass->is_loaded() && target->is_loaded() && 1529169655Srrs !target->is_method_handle_invoke()) { 1530166675Srrs Value receiver = NULL; 1531223132Stuexen ciInstanceKlass* receiver_klass = NULL; 1532166675Srrs bool type_is_exact = false; 1533166675Srrs // try to find a precise receiver type 1534171943Srrs if (will_link && !target->is_static()) { 1535166675Srrs int index = state()->stack_size() - (target->arg_size_no_receiver() + 1); 1536166675Srrs receiver = state()->stack_at(index); 1537166675Srrs ciType* type = receiver->exact_type(); 1538166675Srrs if (type != NULL && type->is_loaded() && 1539166675Srrs type->is_instance_klass() && !type->as_instance_klass()->is_interface()) { 1540169420Srrs receiver_klass = (ciInstanceKlass*) type; 1541169420Srrs type_is_exact = true; 1542163953Srrs } 1543169420Srrs if (type == NULL) { 1544234464Stuexen type = receiver->declared_type(); 1545166675Srrs if (type != NULL && type->is_loaded() && 1546171943Srrs type->is_instance_klass() && !type->as_instance_klass()->is_interface()) { 1547166675Srrs receiver_klass = (ciInstanceKlass*) type; 1548166675Srrs if (receiver_klass->is_leaf_type() && !receiver_klass->is_final()) { 1549166675Srrs // Insert a dependency on this type since 1550166675Srrs // find_monomorphic_target may assume it's already done. 1551169420Srrs dependency_recorder()->assert_leaf_type(receiver_klass); 1552169420Srrs type_is_exact = true; 1553163953Srrs } 1554163953Srrs } 1555166675Srrs } 1556166675Srrs } 1557163953Srrs if (receiver_klass != NULL && type_is_exact && 1558171943Srrs receiver_klass->is_loaded() && code != Bytecodes::_invokespecial) { 1559166675Srrs // If we have the exact receiver type we can bind directly to 1560163953Srrs // the method to call. 1561163953Srrs exact_target = target->resolve_invoke(calling_klass, receiver_klass); 1562166675Srrs if (exact_target != NULL) { 1563171943Srrs target = exact_target; 1564166675Srrs code = Bytecodes::_invokespecial; 1565166675Srrs } 1566163953Srrs } 1567233005Stuexen if (receiver_klass != NULL && 1568171943Srrs receiver_klass->is_subtype_of(actual_recv) && 1569163953Srrs actual_recv->is_initialized()) { 1570171943Srrs actual_recv = receiver_klass; 1571163953Srrs } 1572163953Srrs 1573166675Srrs if ((code == Bytecodes::_invokevirtual && callee_holder->is_initialized()) || 1574163953Srrs (code == Bytecodes::_invokeinterface && callee_holder->is_initialized() && !actual_recv->is_interface())) { 1575163953Srrs // Use CHA on the receiver to select a more precise method. 1576163953Srrs cha_monomorphic_target = target->find_monomorphic_target(calling_klass, callee_holder, actual_recv); 1577163953Srrs } else if (code == Bytecodes::_invokeinterface && callee_holder->is_loaded() && receiver != NULL) { 1578163953Srrs // if there is only one implementor of this interface then we 1579163953Srrs // may be able bind this invoke directly to the implementing 1580163953Srrs // klass but we need both a dependence on the single interface 1581163953Srrs // and on the method we bind to. Additionally since all we know 1582166675Srrs // about the receiver type is the it's supposed to implement the 1583163953Srrs // interface we have to insert a check that it's the class we 1584166675Srrs // expect. Interface types are not checked by the verifier so 1585163953Srrs // they are roughly equivalent to Object. 1586163953Srrs ciInstanceKlass* singleton = NULL; 1587166675Srrs if (target->holder()->nof_implementors() == 1) { 1588163953Srrs singleton = target->holder()->implementor(0); 1589163953Srrs } 1590171943Srrs if (singleton) { 1591171943Srrs cha_monomorphic_target = target->find_monomorphic_target(calling_klass, target->holder(), singleton); 1592171943Srrs if (cha_monomorphic_target != NULL) { 1593171943Srrs // If CHA is able to bind this invoke then update the class 1594171943Srrs // to match that class, otherwise klass will refer to the 1595171943Srrs // interface. 1596171943Srrs klass = cha_monomorphic_target->holder(); 1597171943Srrs actual_recv = target->holder(); 1598163953Srrs 1599163953Srrs // insert a check it's really the expected class. 1600166675Srrs CheckCast* c = new CheckCast(klass, receiver, NULL); 1601163953Srrs c->set_incompatible_class_change_check(); 1602163953Srrs c->set_direct_compare(klass->is_final()); 1603166675Srrs append_split(c); 1604163953Srrs } 1605163953Srrs } 1606166675Srrs } 1607163953Srrs } 1608163953Srrs 1609163953Srrs if (cha_monomorphic_target != NULL) { 1610166675Srrs if (cha_monomorphic_target->is_abstract()) { 1611163953Srrs // Do not optimize for abstract methods 1612166675Srrs cha_monomorphic_target = NULL; 1613163953Srrs } 1614163953Srrs } 1615163953Srrs 1616171943Srrs if (cha_monomorphic_target != NULL) { 1617163953Srrs if (!(target->is_final_method())) { 1618163953Srrs // If we inlined because CHA revealed only a single target method, 1619166675Srrs // then we are dependent on that target method not getting overridden 1620171943Srrs // by dynamic class loading. Be sure to test the "static" receiver 1621163953Srrs // dest_method here, as opposed to the actual receiver, which may 1622163953Srrs // falsely lead us to believe that the receiver is final or private. 1623171943Srrs dependency_recorder()->assert_unique_concrete_method(actual_recv, cha_monomorphic_target); 1624163953Srrs } 1625163953Srrs code = Bytecodes::_invokespecial; 1626163953Srrs } 1627166675Srrs // check if we could do inlining 1628166675Srrs if (!PatchALot && Inline && klass->is_loaded() && 1629163953Srrs (klass->is_initialized() || klass->is_interface() && target->holder()->is_initialized()) 1630163953Srrs && target->will_link(klass, callee_holder, code)) { 1631170091Srrs // callee is known => check if we have static binding 1632170091Srrs assert(target->is_loaded(), "callee must be known"); 1633170091Srrs if (code == Bytecodes::_invokestatic 1634170091Srrs || code == Bytecodes::_invokespecial 1635170091Srrs || code == Bytecodes::_invokevirtual && target->is_final_method() 1636167598Srrs ) { 1637170091Srrs // static binding => check if callee is ok 1638170091Srrs ciMethod* inline_target = (cha_monomorphic_target != NULL) 1639170091Srrs ? cha_monomorphic_target 1640170091Srrs : target; 1641171943Srrs bool res = try_inline(inline_target, (cha_monomorphic_target != NULL) || (exact_target != NULL)); 1642170091Srrs CHECK_BAILOUT(); 1643170091Srrs 1644170091Srrs#ifndef PRODUCT 1645170091Srrs // printing 1646181054Srrs if (PrintInlining && !res) { 1647181054Srrs // if it was successfully inlined, then it was already printed. 1648181054Srrs print_inline_result(inline_target, res); 1649181054Srrs } 1650181054Srrs#endif 1651181054Srrs clear_inline_bailout(); 1652181054Srrs if (res) { 1653181054Srrs // Register dependence if JVMTI has either breakpoint 1654181054Srrs // setting or hotswapping of methods capabilities since they may 1655181054Srrs // cause deoptimization. 1656181054Srrs if (compilation()->env()->jvmti_can_hotswap_or_post_breakpoint()) { 1657181054Srrs dependency_recorder()->assert_evol_method(inline_target); 1658223132Stuexen } 1659181054Srrs return; 1660163953Srrs } 1661163953Srrs } 1662166675Srrs } 1663166675Srrs // If we attempted an inline which did not succeed because of a 1664166675Srrs // bailout during construction of the callee graph, the entire 1665166675Srrs // compilation has to be aborted. This is fairly rare and currently 1666166675Srrs // seems to only occur for jasm-generated classes which contain 1667223132Stuexen // jsr/ret pairs which are not associated with finally clauses and 1668163953Srrs // do not have exception handlers in the containing method, and are 1669163953Srrs // therefore not caught early enough to abort the inlining without 1670163953Srrs // corrupting the graph. (We currently bail out with a non-empty 1671166675Srrs // stack at a ret in these situations.) 1672166675Srrs CHECK_BAILOUT(); 1673166675Srrs 1674168943Srrs // inlining not successful => standard invoke 1675168943Srrs bool is_loaded = target->is_loaded(); 1676168943Srrs bool has_receiver = 1677168943Srrs code == Bytecodes::_invokespecial || 1678168943Srrs code == Bytecodes::_invokevirtual || 1679168943Srrs code == Bytecodes::_invokeinterface; 1680168943Srrs bool is_invokedynamic = code == Bytecodes::_invokedynamic; 1681168943Srrs ValueType* result_type = as_ValueType(target->return_type()); 1682168943Srrs 1683166675Srrs // We require the debug info to be the "state before" because 1684223132Stuexen // invokedynamics may deoptimize. 1685163953Srrs ValueStack* state_before = is_invokedynamic ? state()->copy() : NULL; 1686297662Srrs 1687297662Srrs Values* args = state()->pop_arguments(target->arg_size_no_receiver()); 1688297662Srrs Value recv = has_receiver ? apop() : NULL; 1689297662Srrs int vtable_index = methodOopDesc::invalid_vtable_index; 1690297662Srrs 1691297662Srrs#ifdef SPARC 1692297662Srrs // Currently only supported on Sparc. 1693297662Srrs // The UseInlineCaches only controls dispatch to invokevirtuals for 1694297662Srrs // loaded classes which we weren't able to statically bind. 1695297662Srrs if (!UseInlineCaches && is_loaded && code == Bytecodes::_invokevirtual 1696297662Srrs && !target->can_be_statically_bound()) { 1697297662Srrs // Find a vtable index if one is available 1698297662Srrs vtable_index = target->resolve_vtable_index(calling_klass, callee_holder); 1699297662Srrs } 1700297662Srrs#endif 1701297662Srrs 1702297662Srrs if (recv != NULL && 1703297662Srrs (code == Bytecodes::_invokespecial || 1704297662Srrs !is_loaded || target->is_final() || 1705297662Srrs profile_calls())) { 1706297662Srrs // invokespecial always needs a NULL check. invokevirtual where 1707297662Srrs // the target is final or where it's not known that whether the 1708297662Srrs // target is final requires a NULL check. Otherwise normal 1709297662Srrs // invokevirtual will perform the null check during the lookup 1710297662Srrs // logic or the unverified entry point. Profiling of calls 1711297662Srrs // requires that the null check is performed in all cases. 1712297662Srrs null_check(recv); 1713297662Srrs } 1714297662Srrs 1715297662Srrs if (profile_calls()) { 1716297662Srrs assert(cha_monomorphic_target == NULL || exact_target == NULL, "both can not be set"); 1717163953Srrs ciKlass* target_klass = NULL; 1718163953Srrs if (cha_monomorphic_target != NULL) { 1719166675Srrs target_klass = cha_monomorphic_target->holder(); 1720166675Srrs } else if (exact_target != NULL) { 1721166675Srrs target_klass = exact_target->holder(); 1722211944Stuexen } 1723211944Stuexen profile_call(recv, target_klass); 1724211944Stuexen } 1725211944Stuexen 1726166675Srrs Invoke* result = new Invoke(code, result_type, recv, args, vtable_index, target, state_before); 1727224918Stuexen // push result 1728224918Stuexen append_split(result); 1729224918Stuexen 1730223132Stuexen if (result_type != voidType) { 1731223132Stuexen if (method()->is_strict()) { 1732223132Stuexen push(result_type, round_fp(result)); 1733223132Stuexen } else { 1734223132Stuexen push(result_type, result); 1735223132Stuexen } 1736223132Stuexen } 1737163953Srrs} 1738223132Stuexen 1739223132Stuexen 1740223132Stuexenvoid GraphBuilder::new_instance(int klass_index) { 1741223132Stuexen bool will_link; 1742163953Srrs ciKlass* klass = stream()->get_klass(will_link); 1743171440Srrs assert(klass->is_instance_klass(), "must be an instance klass"); 1744171440Srrs NewInstance* new_instance = new NewInstance(klass->as_instance_klass()); 1745171440Srrs _memory->new_instance(new_instance); 1746171440Srrs apush(append_split(new_instance)); 1747171440Srrs} 1748171440Srrs 1749171440Srrs 1750171440Srrsvoid GraphBuilder::new_type_array() { 1751171440Srrs apush(append_split(new NewTypeArray(ipop(), (BasicType)stream()->get_index()))); 1752171440Srrs} 1753224918Stuexen 1754224918Stuexen 1755224918Stuexenvoid GraphBuilder::new_object_array() { 1756223132Stuexen bool will_link; 1757223132Stuexen ciKlass* klass = stream()->get_klass(will_link); 1758223132Stuexen ValueStack* state_before = !klass->is_loaded() || PatchALot ? state()->copy() : NULL; 1759223132Stuexen NewArray* n = new NewObjectArray(klass, ipop(), state_before); 1760223132Stuexen apush(append_split(n)); 1761223132Stuexen} 1762223132Stuexen 1763171440Srrs 1764223132Stuexenbool GraphBuilder::direct_compare(ciKlass* k) { 1765223132Stuexen if (k->is_loaded() && k->is_instance_klass() && !UseSlowPath) { 1766223132Stuexen ciInstanceKlass* ik = k->as_instance_klass(); 1767223132Stuexen if (ik->is_final()) { 1768171440Srrs return true; 1769219057Srrs } else { 1770219057Srrs if (DeoptC1 && UseCHA && !(ik->has_subklass() || ik->is_interface())) { 1771219057Srrs // test class is leaf class 1772219057Srrs dependency_recorder()->assert_leaf_type(ik); 1773219057Srrs return true; 1774219057Srrs } 1775219057Srrs } 1776219057Srrs } 1777219057Srrs return false; 1778219057Srrs} 1779219057Srrs 1780219057Srrs 1781223132Stuexenvoid GraphBuilder::check_cast(int klass_index) { 1782223132Stuexen bool will_link; 1783219057Srrs ciKlass* klass = stream()->get_klass(will_link); 1784219057Srrs ValueStack* state_before = !klass->is_loaded() || PatchALot ? state()->copy() : NULL; 1785219057Srrs CheckCast* c = new CheckCast(klass, apop(), state_before); 1786223132Stuexen apush(append_split(c)); 1787219057Srrs c->set_direct_compare(direct_compare(klass)); 1788217760Stuexen if (profile_checkcasts()) { 1789217760Stuexen c->set_profiled_method(method()); 1790217760Stuexen c->set_profiled_bci(bci()); 1791217760Stuexen c->set_should_profile(true); 1792217760Stuexen } 1793217760Stuexen} 1794217760Stuexen 1795217760Stuexen 1796217760Stuexenvoid GraphBuilder::instance_of(int klass_index) { 1797217760Stuexen bool will_link; 1798224918Stuexen ciKlass* klass = stream()->get_klass(will_link); 1799224918Stuexen ValueStack* state_before = !klass->is_loaded() || PatchALot ? state()->copy() : NULL; 1800224918Stuexen InstanceOf* i = new InstanceOf(klass, apop(), state_before); 1801223132Stuexen ipush(append_split(i)); 1802223132Stuexen i->set_direct_compare(direct_compare(klass)); 1803223132Stuexen} 1804223132Stuexen 1805223132Stuexen 1806223132Stuexenvoid GraphBuilder::monitorenter(Value x, int bci) { 1807223132Stuexen // save state before locking in case of deoptimization after a NullPointerException 1808217760Stuexen ValueStack* lock_stack_before = lock_stack(); 1809223132Stuexen append_with_bci(new MonitorEnter(x, state()->lock(scope(), x), lock_stack_before), bci); 1810223132Stuexen kill_all(); 1811223132Stuexen} 1812223132Stuexen 1813217760Stuexen 1814217760Stuexenvoid GraphBuilder::monitorexit(Value x, int bci) { 1815217760Stuexen // Note: the comment below is only relevant for the case where we do 1816217760Stuexen // not deoptimize due to asynchronous exceptions (!(DeoptC1 && 1817217760Stuexen // DeoptOnAsyncException), which is not used anymore) 1818217760Stuexen 1819217760Stuexen // Note: Potentially, the monitor state in an exception handler 1820217760Stuexen // can be wrong due to wrong 'initialization' of the handler 1821277804Sdelphij // via a wrong asynchronous exception path. This can happen, 1822277804Sdelphij // if the exception handler range for asynchronous exceptions 1823277804Sdelphij // is too long (see also java bug 4327029, and comment in 1824217760Stuexen // GraphBuilder::handle_exception()). This may cause 'under- 1825217760Stuexen // flow' of the monitor stack => bailout instead. 1826217760Stuexen if (state()->locks_size() < 1) BAILOUT("monitor stack underflow"); 1827223132Stuexen append_with_bci(new MonitorExit(x, state()->unlock()), bci); 1828217760Stuexen kill_all(); 1829217760Stuexen} 1830217760Stuexen 1831217760Stuexen 1832217760Stuexenvoid GraphBuilder::new_multi_array(int dimensions) { 1833217760Stuexen bool will_link; 1834217760Stuexen ciKlass* klass = stream()->get_klass(will_link); 1835217760Stuexen ValueStack* state_before = !klass->is_loaded() || PatchALot ? state()->copy() : NULL; 1836217760Stuexen 1837217760Stuexen Values* dims = new Values(dimensions, NULL); 1838223132Stuexen // fill in all dimensions 1839217760Stuexen int i = dimensions; 1840163953Srrs while (i-- > 0) dims->at_put(i, ipop()); 1841163953Srrs // create array 1842163953Srrs NewArray* n = new NewMultiArray(klass, dims, state_before); 1843163953Srrs apush(append_split(n)); 1844166675Srrs} 1845163953Srrs 1846167598Srrs 1847163953Srrsvoid GraphBuilder::throw_op(int bci) { 1848163953Srrs // We require that the debug info for a Throw be the "state before" 1849163953Srrs // the Throw (i.e., exception oop is still on TOS) 1850163953Srrs ValueStack* state_before = state()->copy(); 1851163953Srrs Throw* t = new Throw(apop(), state_before); 1852167598Srrs append_with_bci(t, bci); 1853163953Srrs} 1854163953Srrs 1855163953Srrs 1856163953SrrsValue GraphBuilder::round_fp(Value fp_value) { 1857163953Srrs // no rounding needed if SSE2 is used 1858172091Srrs if (RoundFPResults && UseSSE < 2) { 1859171943Srrs // Must currently insert rounding node for doubleword values that 1860223132Stuexen // are results of expressions (i.e., not loads from memory or 1861223132Stuexen // constants) 1862172091Srrs if (fp_value->type()->tag() == doubleTag && 1863223132Stuexen fp_value->as_Constant() == NULL && 1864163953Srrs fp_value->as_Local() == NULL && // method parameters need no rounding 1865169655Srrs fp_value->as_RoundFP() == NULL) { 1866163953Srrs return append(new RoundFP(fp_value)); 1867169655Srrs } 1868163953Srrs } 1869169655Srrs return fp_value; 1870293913Stuexen} 1871293913Stuexen 1872293913Stuexen 1873293913StuexenInstruction* GraphBuilder::append_with_bci(Instruction* instr, int bci) { 1874293913Stuexen Canonicalizer canon(instr, bci); 1875293913Stuexen Instruction* i1 = canon.canonical(); 1876293913Stuexen if (i1->bci() != -99) { 1877293913Stuexen // Canonicalizer returned an instruction which was already 1878163953Srrs // appended so simply return it. 1879169655Srrs return i1; 1880169655Srrs } else if (UseLocalValueNumbering) { 1881163953Srrs // Lookup the instruction in the ValueMap and add it to the map if 1882169655Srrs // it's not found. 1883169655Srrs Instruction* i2 = vmap()->find_insert(i1); 1884169655Srrs if (i2 != i1) { 1885223132Stuexen // found an entry in the value map, so just return it. 1886169655Srrs assert(i2->bci() != -1, "should already be linked"); 1887169655Srrs return i2; 1888169655Srrs } 1889169655Srrs ValueNumberingEffects vne(vmap()); 1890297312Stuexen i1->visit(&vne); 1891297312Stuexen } 1892169655Srrs 1893169655Srrs if (i1->as_Phi() == NULL && i1->as_Local() == NULL) { 1894293913Stuexen // i1 was not eliminated => append it 1895293913Stuexen assert(i1->next() == NULL, "shouldn't already be linked"); 1896293913Stuexen _last = _last->set_next(i1, canon.bci()); 1897293913Stuexen if (++_instruction_count >= InstructionCountCutoff 1898293913Stuexen && !bailed_out()) { 1899293913Stuexen // set the bailout state but complete normal processing. We 1900293913Stuexen // might do a little more work before noticing the bailout so we 1901293913Stuexen // want processing to continue normally until it's noticed. 1902163953Srrs bailout("Method and/or inlining is too large"); 1903185694Srrs } 1904169655Srrs 1905169655Srrs#ifndef PRODUCT 1906169655Srrs if (PrintIRDuringConstruction) { 1907297312Stuexen InstructionPrinter ip; 1908297312Stuexen ip.print_line(i1); 1909297312Stuexen if (Verbose) { 1910297312Stuexen state()->print(); 1911297312Stuexen } 1912169655Srrs } 1913169655Srrs#endif 1914171943Srrs assert(_last == i1, "adjust code below"); 1915163953Srrs StateSplit* s = i1->as_StateSplit(); 1916163953Srrs if (s != NULL && i1->as_BlockEnd() == NULL) { 1917163953Srrs if (EliminateFieldAccess) { 1918163953Srrs Intrinsic* intrinsic = s->as_Intrinsic(); 1919223132Stuexen if (s->as_Invoke() != NULL || (intrinsic && !intrinsic->preserves_state())) { 1920223132Stuexen _memory->kill(); 1921223132Stuexen } 1922223132Stuexen } 1923223132Stuexen s->set_state(state()->copy()); 1924163953Srrs } 1925163953Srrs // set up exception handlers for this instruction if necessary 1926163953Srrs if (i1->can_trap()) { 1927163953Srrs assert(exception_state() != NULL || !has_handler(), "must have setup exception state"); 1928163953Srrs i1->set_exception_handlers(handle_exception(bci)); 1929166675Srrs } 1930166675Srrs } 1931166675Srrs return i1; 1932166675Srrs} 1933166675Srrs 1934166675Srrs 1935163953SrrsInstruction* GraphBuilder::append(Instruction* instr) { 1936224918Stuexen assert(instr->as_StateSplit() == NULL || instr->as_BlockEnd() != NULL, "wrong append used"); 1937224918Stuexen return append_with_bci(instr, bci()); 1938224918Stuexen} 1939223132Stuexen 1940223132Stuexen 1941223132StuexenInstruction* GraphBuilder::append_split(StateSplit* instr) { 1942223132Stuexen return append_with_bci(instr, bci()); 1943223132Stuexen} 1944223132Stuexen 1945223132Stuexen 1946163953Srrsvoid GraphBuilder::null_check(Value value) { 1947223132Stuexen if (value->as_NewArray() != NULL || value->as_NewInstance() != NULL) { 1948223132Stuexen return; 1949223132Stuexen } else { 1950223132Stuexen Constant* con = value->as_Constant(); 1951163953Srrs if (con) { 1952167598Srrs ObjectType* c = con->type()->as_ObjectType(); 1953167598Srrs if (c && c->is_loaded()) { 1954170056Srrs ObjectConstant* oc = c->as_ObjectConstant(); 1955167598Srrs if (!oc || !oc->value()->is_null_object()) { 1956170056Srrs return; 1957170056Srrs } 1958223132Stuexen } 1959167598Srrs } 1960167598Srrs } 1961167598Srrs append(new NullCheck(value, lock_stack())); 1962167598Srrs} 1963167598Srrs 1964167598Srrs 1965167598Srrs 1966167598SrrsXHandlers* GraphBuilder::handle_exception(int cur_bci) { 1967167598Srrs // fast path if it is guaranteed that no exception handlers are present 1968167598Srrs if (!has_handler()) { 1969171943Srrs // TODO: check if return NULL is possible (avoids empty lists) 1970223132Stuexen return new XHandlers(); 1971223132Stuexen } 1972223132Stuexen 1973167598Srrs XHandlers* exception_handlers = new XHandlers(); 1974167598Srrs ScopeData* cur_scope_data = scope_data(); 1975167598Srrs ValueStack* s = exception_state(); 1976167598Srrs int scope_count = 0; 1977167598Srrs 1978171943Srrs assert(s != NULL, "exception state must be set"); 1979167598Srrs do { 1980167598Srrs assert(cur_scope_data->scope() == s->scope(), "scopes do not match"); 1981167598Srrs assert(cur_bci == SynchronizationEntryBCI || cur_bci == cur_scope_data->stream()->cur_bci(), "invalid bci"); 1982163953Srrs 1983163953Srrs // join with all potential exception handlers 1984163953Srrs XHandlers* list = cur_scope_data->xhandlers(); 1985163953Srrs const int n = list->length(); 1986166675Srrs for (int i = 0; i < n; i++) { 1987166675Srrs XHandler* h = list->handler_at(i); 1988166675Srrs if (h->covers(cur_bci)) { 1989166675Srrs // h is a potential exception handler => join it 1990163953Srrs compilation()->set_has_exception_handlers(true); 1991163953Srrs 1992163953Srrs BlockBegin* entry = h->entry_block(); 1993223132Stuexen if (entry == block()) { 1994166675Srrs // It's acceptable for an exception handler to cover itself 1995171943Srrs // but we don't handle that in the parser currently. It's 1996166675Srrs // very rare so we bailout instead of trying to handle it. 1997163953Srrs BAILOUT_("exception handler covers itself", exception_handlers); 1998223132Stuexen } 1999163953Srrs assert(entry->bci() == h->handler_bci(), "must match"); 2000170056Srrs assert(entry->bci() == -1 || entry == cur_scope_data->block_at(entry->bci()), "blocks must correspond"); 2001163953Srrs 2002170056Srrs // previously this was a BAILOUT, but this is not necessary 2003163953Srrs // now because asynchronous exceptions are not handled this way. 2004170056Srrs assert(entry->state() == NULL || s->locks_size() == entry->state()->locks_size(), "locks do not match"); 2005170056Srrs 2006166675Srrs // xhandler start with an empty expression stack 2007170056Srrs s->truncate_stack(cur_scope_data->caller_stack_size()); 2008170056Srrs 2009166675Srrs // Note: Usually this join must work. However, very 2010166675Srrs // complicated jsr-ret structures where we don't ret from 2011224918Stuexen // the subroutine can cause the objects on the monitor 2012224918Stuexen // stacks to not match because blocks can be parsed twice. 2013224918Stuexen // The only test case we've seen so far which exhibits this 2014223132Stuexen // problem is caught by the infinite recursion test in 2015223132Stuexen // GraphBuilder::jsr() if the join doesn't work. 2016223132Stuexen if (!entry->try_merge(s)) { 2017223132Stuexen BAILOUT_("error while joining with exception handler, prob. due to complicated jsr/rets", exception_handlers); 2018223132Stuexen } 2019223132Stuexen 2020223132Stuexen // add current state for correct handling of phi functions at begin of xhandler 2021223132Stuexen int phi_operand = entry->add_exception_state(s); 2022163953Srrs 2023223132Stuexen // add entry to the list of xhandlers of this block 2024223132Stuexen _block->add_exception_handler(entry); 2025223132Stuexen 2026223132Stuexen // add back-edge from xhandler entry to this block 2027163953Srrs if (!entry->is_predecessor(_block)) { 2028163953Srrs entry->add_predecessor(_block); 2029166675Srrs } 2030163953Srrs 2031163953Srrs // clone XHandler because phi_operand and scope_count can not be shared 2032166675Srrs XHandler* new_xhandler = new XHandler(h); 2033166675Srrs new_xhandler->set_phi_operand(phi_operand); 2034166675Srrs new_xhandler->set_scope_count(scope_count); 2035166675Srrs exception_handlers->append(new_xhandler); 2036166675Srrs 2037166675Srrs // fill in exception handler subgraph lazily 2038166675Srrs assert(!entry->is_set(BlockBegin::was_visited_flag), "entry must not be visited yet"); 2039166675Srrs cur_scope_data->add_to_work_list(entry); 2040223132Stuexen 2041166675Srrs // stop when reaching catchall 2042171943Srrs if (h->catch_type() == 0) { 2043163953Srrs return exception_handlers; 2044163953Srrs } 2045223132Stuexen } 2046163953Srrs } 2047170056Srrs 2048163953Srrs // Set up iteration for next time. 2049217895Stuexen // If parsing a jsr, do not grab exception handlers from the 2050163953Srrs // parent scopes for this method (already got them, and they 2051217895Stuexen // needed to be cloned) 2052217895Stuexen if (cur_scope_data->parsing_jsr()) { 2053166675Srrs IRScope* tmp_scope = cur_scope_data->scope(); 2054217895Stuexen while (cur_scope_data->parent() != NULL && 2055217895Stuexen cur_scope_data->parent()->scope() == tmp_scope) { 2056217895Stuexen cur_scope_data = cur_scope_data->parent(); 2057217894Stuexen } 2058224918Stuexen } 2059224918Stuexen if (cur_scope_data != NULL) { 2060224918Stuexen if (cur_scope_data->parent() != NULL) { 2061223132Stuexen // must use pop_scope instead of caller_state to preserve all monitors 2062223132Stuexen s = s->pop_scope(); 2063223132Stuexen } 2064223132Stuexen cur_bci = cur_scope_data->scope()->caller_bci(); 2065223132Stuexen cur_scope_data = cur_scope_data->parent(); 2066223132Stuexen scope_count++; 2067223132Stuexen } 2068217894Stuexen } while (cur_scope_data != NULL); 2069223132Stuexen 2070223132Stuexen return exception_handlers; 2071223132Stuexen} 2072223132Stuexen 2073163953Srrs 2074163953Srrs// Helper class for simplifying Phis. 2075163953Srrsclass PhiSimplifier : public BlockClosure { 2076167598Srrs private: 2077163953Srrs bool _has_substitutions; 2078163953Srrs Value simplify(Value v); 2079167598Srrs 2080170056Srrs public: 2081163953Srrs PhiSimplifier(BlockBegin* start) : _has_substitutions(false) { 2082167598Srrs start->iterate_preorder(this); 2083167598Srrs if (_has_substitutions) { 2084167598Srrs SubstitutionResolver sr(start); 2085163953Srrs } 2086224918Stuexen } 2087224918Stuexen void block_do(BlockBegin* b); 2088224918Stuexen bool has_substitutions() const { return _has_substitutions; } 2089223132Stuexen}; 2090223132Stuexen 2091223132Stuexen 2092223132StuexenValue PhiSimplifier::simplify(Value v) { 2093223132Stuexen Phi* phi = v->as_Phi(); 2094223132Stuexen 2095223132Stuexen if (phi == NULL) { 2096223132Stuexen // no phi function 2097223132Stuexen return v; 2098223132Stuexen } else if (v->has_subst()) { 2099223132Stuexen // already substituted; subst can be phi itself -> simplify 2100167598Srrs return simplify(v->subst()); 2101223132Stuexen } else if (phi->is_set(Phi::cannot_simplify)) { 2102223132Stuexen // already tried to simplify phi before 2103167598Srrs return phi; 2104163953Srrs } else if (phi->is_set(Phi::visited)) { 2105223132Stuexen // break cycles in phi functions 2106223132Stuexen return phi; 2107223132Stuexen } else if (phi->type()->is_illegal()) { 2108223132Stuexen // illegal phi functions are ignored anyway 2109163953Srrs return phi; 2110163953Srrs 2111167598Srrs } else { 2112163953Srrs // mark phi function as processed to break cycles in phi functions 2113163953Srrs phi->set(Phi::visited); 2114163953Srrs 2115163953Srrs // simplify x = [y, x] and x = [y, y] to y 2116163953Srrs Value subst = NULL; 2117166675Srrs int opd_count = phi->operand_count(); 2118223132Stuexen for (int i = 0; i < opd_count; i++) { 2119163953Srrs Value opd = phi->operand_at(i); 2120163953Srrs assert(opd != NULL, "Operand must exist!"); 2121163953Srrs 2122163953Srrs if (opd->type()->is_illegal()) { 2123163953Srrs // if one operand is illegal, the entire phi function is illegal 2124163953Srrs phi->make_illegal(); 2125163953Srrs phi->clear(Phi::visited); 2126163953Srrs return phi; 2127163953Srrs } 2128163953Srrs 2129163953Srrs Value new_opd = simplify(opd); 2130163953Srrs assert(new_opd != NULL, "Simplified operand must exist!"); 2131163953Srrs 2132163953Srrs if (new_opd != phi && new_opd != subst) { 2133163953Srrs if (subst == NULL) { 2134163953Srrs subst = new_opd; 2135163953Srrs } else { 2136163953Srrs // no simplification possible 2137163953Srrs phi->set(Phi::cannot_simplify); 2138163953Srrs phi->clear(Phi::visited); 2139163953Srrs return phi; 2140163953Srrs } 2141163953Srrs } 2142163953Srrs } 2143163953Srrs 2144163953Srrs // sucessfully simplified phi function 2145163953Srrs assert(subst != NULL, "illegal phi function"); 2146163953Srrs _has_substitutions = true; 2147185694Srrs phi->clear(Phi::visited); 2148185694Srrs phi->set_subst(subst); 2149185694Srrs 2150163953Srrs#ifndef PRODUCT 2151202520Srrs if (PrintPhiFunctions) { 2152163953Srrs tty->print_cr("simplified phi function %c%d to %c%d (Block B%d)", phi->type()->tchar(), phi->id(), subst->type()->tchar(), subst->id(), phi->block()->block_id()); 2153166675Srrs } 2154223132Stuexen#endif 2155163953Srrs 2156163953Srrs return subst; 2157166675Srrs } 2158166675Srrs} 2159166675Srrs 2160166675Srrs 2161166675Srrsvoid PhiSimplifier::block_do(BlockBegin* b) { 2162166675Srrs for_each_phi_fun(b, phi, 2163166675Srrs simplify(phi); 2164166675Srrs ); 2165166675Srrs 2166223132Stuexen#ifdef ASSERT 2167163953Srrs for_each_phi_fun(b, phi, 2168163953Srrs assert(phi->operand_count() != 1 || phi->subst() != phi, "missed trivial simplification"); 2169166675Srrs ); 2170166675Srrs 2171166675Srrs ValueStack* state = b->state()->caller_state(); 2172166675Srrs int index; 2173166675Srrs Value value; 2174166675Srrs for_each_state(state) { 2175166675Srrs for_each_local_value(state, index, value) { 2176166675Srrs Phi* phi = value->as_Phi(); 2177223132Stuexen assert(phi == NULL || phi->block() != b, "must not have phi function to simplify in caller state"); 2178163953Srrs } 2179163953Srrs } 2180166675Srrs#endif 2181166675Srrs} 2182166675Srrs 2183166675Srrs// This method is called after all blocks are filled with HIR instructions 2184166675Srrs// It eliminates all Phi functions of the form x = [y, y] and x = [y, x] 2185168124Srrsvoid GraphBuilder::eliminate_redundant_phis(BlockBegin* start) { 2186166675Srrs PhiSimplifier simplifier(start); 2187166675Srrs} 2188223132Stuexen 2189163953Srrs 2190163953Srrsvoid GraphBuilder::connect_to_end(BlockBegin* beg) { 2191163953Srrs // setup iteration 2192166675Srrs kill_all(); 2193166675Srrs _block = beg; 2194163953Srrs _state = beg->state()->copy(); 2195163953Srrs _last = beg; 2196166675Srrs iterate_bytecodes_for_block(beg->bci()); 2197166675Srrs} 2198166675Srrs 2199166675Srrs 2200166675SrrsBlockEnd* GraphBuilder::iterate_bytecodes_for_block(int bci) { 2201166675Srrs#ifndef PRODUCT 2202166675Srrs if (PrintIRDuringConstruction) { 2203166675Srrs tty->cr(); 2204275567Stuexen InstructionPrinter ip; 2205221249Stuexen ip.print_instr(_block); tty->cr(); 2206275567Stuexen ip.print_stack(_block->state()); tty->cr(); 2207275567Stuexen ip.print_inline_level(_block); 2208275567Stuexen ip.print_head(); 2209275567Stuexen tty->print_cr("locals size: %d stack size: %d", state()->locals_size(), state()->stack_size()); 2210275567Stuexen } 2211221249Stuexen#endif 2212275567Stuexen _skip_block = false; 2213275567Stuexen assert(state() != NULL, "ValueStack missing!"); 2214275567Stuexen ciBytecodeStream s(method()); 2215221249Stuexen s.reset_to_bci(bci); 2216275567Stuexen int prev_bci = bci; 2217275567Stuexen scope_data()->set_stream(&s); 2218221249Stuexen // iterate 2219275567Stuexen Bytecodes::Code code = Bytecodes::_illegal; 2220275567Stuexen bool push_exception = false; 2221275567Stuexen 2222221249Stuexen if (block()->is_set(BlockBegin::exception_entry_flag) && block()->next() == NULL) { 2223275567Stuexen // first thing in the exception entry block should be the exception object. 2224275567Stuexen push_exception = true; 2225166675Srrs } 2226163953Srrs 2227166675Srrs while (!bailed_out() && last()->as_BlockEnd() == NULL && 2228166675Srrs (code = stream()->next()) != ciBytecodeStream::EOBC() && 2229223132Stuexen (block_at(s.cur_bci()) == NULL || block_at(s.cur_bci()) == block())) { 2230166675Srrs 2231171943Srrs if (has_handler() && can_trap(method(), code)) { 2232166675Srrs // copy the state because it is modified before handle_exception is called 2233163953Srrs set_exception_state(state()->copy()); 2234223132Stuexen } else { 2235163953Srrs // handle_exception is not called for this bytecode 2236163953Srrs set_exception_state(NULL); 2237163953Srrs } 2238163953Srrs 2239163953Srrs // Check for active jsr during OSR compilation 2240163953Srrs if (compilation()->is_osr_compile() 2241163953Srrs && scope()->is_top_scope() 2242166675Srrs && parsing_jsr() 2243163953Srrs && s.cur_bci() == compilation()->osr_bci()) { 2244163953Srrs bailout("OSR not supported while a jsr is active"); 2245163953Srrs } 2246163953Srrs 2247166675Srrs if (push_exception) { 2248166675Srrs apush(append(new ExceptionObject())); 2249163953Srrs push_exception = false; 2250166675Srrs } 2251166675Srrs 2252166675Srrs // handle bytecode 2253166675Srrs switch (code) { 2254166675Srrs case Bytecodes::_nop : /* nothing to do */ break; 2255166675Srrs case Bytecodes::_aconst_null : apush(append(new Constant(objectNull ))); break; 2256275567Stuexen case Bytecodes::_iconst_m1 : ipush(append(new Constant(new IntConstant (-1)))); break; 2257221249Stuexen case Bytecodes::_iconst_0 : ipush(append(new Constant(intZero ))); break; 2258275567Stuexen case Bytecodes::_iconst_1 : ipush(append(new Constant(intOne ))); break; 2259275567Stuexen case Bytecodes::_iconst_2 : ipush(append(new Constant(new IntConstant ( 2)))); break; 2260275567Stuexen case Bytecodes::_iconst_3 : ipush(append(new Constant(new IntConstant ( 3)))); break; 2261275567Stuexen case Bytecodes::_iconst_4 : ipush(append(new Constant(new IntConstant ( 4)))); break; 2262275567Stuexen case Bytecodes::_iconst_5 : ipush(append(new Constant(new IntConstant ( 5)))); break; 2263221249Stuexen case Bytecodes::_lconst_0 : lpush(append(new Constant(new LongConstant ( 0)))); break; 2264275567Stuexen case Bytecodes::_lconst_1 : lpush(append(new Constant(new LongConstant ( 1)))); break; 2265275567Stuexen case Bytecodes::_fconst_0 : fpush(append(new Constant(new FloatConstant ( 0)))); break; 2266275567Stuexen case Bytecodes::_fconst_1 : fpush(append(new Constant(new FloatConstant ( 1)))); break; 2267221249Stuexen case Bytecodes::_fconst_2 : fpush(append(new Constant(new FloatConstant ( 2)))); break; 2268275567Stuexen case Bytecodes::_dconst_0 : dpush(append(new Constant(new DoubleConstant( 0)))); break; 2269275567Stuexen case Bytecodes::_dconst_1 : dpush(append(new Constant(new DoubleConstant( 1)))); break; 2270221249Stuexen case Bytecodes::_bipush : ipush(append(new Constant(new IntConstant(((signed char*)s.cur_bcp())[1])))); break; 2271275567Stuexen case Bytecodes::_sipush : ipush(append(new Constant(new IntConstant((short)Bytes::get_Java_u2(s.cur_bcp()+1))))); break; 2272275567Stuexen case Bytecodes::_ldc : // fall through 2273275567Stuexen case Bytecodes::_ldc_w : // fall through 2274221249Stuexen case Bytecodes::_ldc2_w : load_constant(); break; 2275275567Stuexen case Bytecodes::_iload : load_local(intType , s.get_index()); break; 2276275567Stuexen case Bytecodes::_lload : load_local(longType , s.get_index()); break; 2277275567Stuexen case Bytecodes::_fload : load_local(floatType , s.get_index()); break; 2278221249Stuexen case Bytecodes::_dload : load_local(doubleType , s.get_index()); break; 2279221249Stuexen case Bytecodes::_aload : load_local(instanceType, s.get_index()); break; 2280166675Srrs case Bytecodes::_iload_0 : load_local(intType , 0); break; 2281166675Srrs case Bytecodes::_iload_1 : load_local(intType , 1); break; 2282166675Srrs case Bytecodes::_iload_2 : load_local(intType , 2); break; 2283166675Srrs case Bytecodes::_iload_3 : load_local(intType , 3); break; 2284166675Srrs case Bytecodes::_lload_0 : load_local(longType , 0); break; 2285166675Srrs case Bytecodes::_lload_1 : load_local(longType , 1); break; 2286221249Stuexen case Bytecodes::_lload_2 : load_local(longType , 2); break; 2287178251Srrs case Bytecodes::_lload_3 : load_local(longType , 3); break; 2288275567Stuexen case Bytecodes::_fload_0 : load_local(floatType , 0); break; 2289166675Srrs case Bytecodes::_fload_1 : load_local(floatType , 1); break; 2290275567Stuexen case Bytecodes::_fload_2 : load_local(floatType , 2); break; 2291166675Srrs case Bytecodes::_fload_3 : load_local(floatType , 3); break; 2292166675Srrs case Bytecodes::_dload_0 : load_local(doubleType, 0); break; 2293166675Srrs case Bytecodes::_dload_1 : load_local(doubleType, 1); break; 2294166675Srrs case Bytecodes::_dload_2 : load_local(doubleType, 2); break; 2295275567Stuexen case Bytecodes::_dload_3 : load_local(doubleType, 3); break; 2296275567Stuexen case Bytecodes::_aload_0 : load_local(objectType, 0); break; 2297178251Srrs case Bytecodes::_aload_1 : load_local(objectType, 1); break; 2298166675Srrs case Bytecodes::_aload_2 : load_local(objectType, 2); break; 2299166675Srrs case Bytecodes::_aload_3 : load_local(objectType, 3); break; 2300166675Srrs case Bytecodes::_iaload : load_indexed(T_INT ); break; 2301166675Srrs case Bytecodes::_laload : load_indexed(T_LONG ); break; 2302166675Srrs case Bytecodes::_faload : load_indexed(T_FLOAT ); break; 2303163953Srrs case Bytecodes::_daload : load_indexed(T_DOUBLE); break; 2304166675Srrs case Bytecodes::_aaload : load_indexed(T_OBJECT); break; 2305166675Srrs case Bytecodes::_baload : load_indexed(T_BYTE ); break; 2306171943Srrs case Bytecodes::_caload : load_indexed(T_CHAR ); break; 2307166675Srrs case Bytecodes::_saload : load_indexed(T_SHORT ); break; 2308163953Srrs case Bytecodes::_istore : store_local(intType , s.get_index()); break; 2309223132Stuexen case Bytecodes::_lstore : store_local(longType , s.get_index()); break; 2310163953Srrs case Bytecodes::_fstore : store_local(floatType , s.get_index()); break; 2311163953Srrs case Bytecodes::_dstore : store_local(doubleType, s.get_index()); break; 2312163953Srrs case Bytecodes::_astore : store_local(objectType, s.get_index()); break; 2313166675Srrs case Bytecodes::_istore_0 : store_local(intType , 0); break; 2314163953Srrs case Bytecodes::_istore_1 : store_local(intType , 1); break; 2315163953Srrs case Bytecodes::_istore_2 : store_local(intType , 2); break; 2316163953Srrs case Bytecodes::_istore_3 : store_local(intType , 3); break; 2317166675Srrs case Bytecodes::_lstore_0 : store_local(longType , 0); break; 2318166675Srrs case Bytecodes::_lstore_1 : store_local(longType , 1); break; 2319163953Srrs case Bytecodes::_lstore_2 : store_local(longType , 2); break; 2320163953Srrs case Bytecodes::_lstore_3 : store_local(longType , 3); break; 2321166675Srrs case Bytecodes::_fstore_0 : store_local(floatType , 0); break; 2322168124Srrs case Bytecodes::_fstore_1 : store_local(floatType , 1); break; 2323169655Srrs case Bytecodes::_fstore_2 : store_local(floatType , 2); break; 2324163953Srrs case Bytecodes::_fstore_3 : store_local(floatType , 3); break; 2325169655Srrs case Bytecodes::_dstore_0 : store_local(doubleType, 0); break; 2326166675Srrs case Bytecodes::_dstore_1 : store_local(doubleType, 1); break; 2327223132Stuexen case Bytecodes::_dstore_2 : store_local(doubleType, 2); break; 2328163953Srrs case Bytecodes::_dstore_3 : store_local(doubleType, 3); break; 2329163953Srrs case Bytecodes::_astore_0 : store_local(objectType, 0); break; 2330163953Srrs case Bytecodes::_astore_1 : store_local(objectType, 1); break; 2331163953Srrs case Bytecodes::_astore_2 : store_local(objectType, 2); break; 2332163953Srrs case Bytecodes::_astore_3 : store_local(objectType, 3); break; 2333275567Stuexen case Bytecodes::_iastore : store_indexed(T_INT ); break; 2334163953Srrs case Bytecodes::_lastore : store_indexed(T_LONG ); break; 2335275567Stuexen case Bytecodes::_fastore : store_indexed(T_FLOAT ); break; 2336275567Stuexen case Bytecodes::_dastore : store_indexed(T_DOUBLE); break; 2337275567Stuexen case Bytecodes::_aastore : store_indexed(T_OBJECT); break; 2338275567Stuexen case Bytecodes::_bastore : store_indexed(T_BYTE ); break; 2339275567Stuexen case Bytecodes::_castore : store_indexed(T_CHAR ); break; 2340166675Srrs case Bytecodes::_sastore : store_indexed(T_SHORT ); break; 2341166675Srrs case Bytecodes::_pop : // fall through 2342163953Srrs case Bytecodes::_pop2 : // fall through 2343275567Stuexen case Bytecodes::_dup : // fall through 2344275567Stuexen case Bytecodes::_dup_x1 : // fall through 2345275567Stuexen case Bytecodes::_dup_x2 : // fall through 2346275567Stuexen case Bytecodes::_dup2 : // fall through 2347275567Stuexen case Bytecodes::_dup2_x1 : // fall through 2348275567Stuexen case Bytecodes::_dup2_x2 : // fall through 2349275567Stuexen case Bytecodes::_swap : stack_op(code); break; 2350275567Stuexen case Bytecodes::_iadd : arithmetic_op(intType , code); break; 2351275567Stuexen case Bytecodes::_ladd : arithmetic_op(longType , code); break; 2352275567Stuexen case Bytecodes::_fadd : arithmetic_op(floatType , code); break; 2353275567Stuexen case Bytecodes::_dadd : arithmetic_op(doubleType, code); break; 2354166675Srrs case Bytecodes::_isub : arithmetic_op(intType , code); break; 2355275567Stuexen case Bytecodes::_lsub : arithmetic_op(longType , code); break; 2356275567Stuexen case Bytecodes::_fsub : arithmetic_op(floatType , code); break; 2357275567Stuexen case Bytecodes::_dsub : arithmetic_op(doubleType, code); break; 2358275567Stuexen case Bytecodes::_imul : arithmetic_op(intType , code); break; 2359275567Stuexen case Bytecodes::_lmul : arithmetic_op(longType , code); break; 2360275567Stuexen case Bytecodes::_fmul : arithmetic_op(floatType , code); break; 2361275567Stuexen case Bytecodes::_dmul : arithmetic_op(doubleType, code); break; 2362275567Stuexen case Bytecodes::_idiv : arithmetic_op(intType , code, lock_stack()); break; 2363166675Srrs case Bytecodes::_ldiv : arithmetic_op(longType , code, lock_stack()); break; 2364166675Srrs case Bytecodes::_fdiv : arithmetic_op(floatType , code); break; 2365166675Srrs case Bytecodes::_ddiv : arithmetic_op(doubleType, code); break; 2366166675Srrs case Bytecodes::_irem : arithmetic_op(intType , code, lock_stack()); break; 2367166675Srrs case Bytecodes::_lrem : arithmetic_op(longType , code, lock_stack()); break; 2368166675Srrs case Bytecodes::_frem : arithmetic_op(floatType , code); break; 2369166675Srrs case Bytecodes::_drem : arithmetic_op(doubleType, code); break; 2370275567Stuexen case Bytecodes::_ineg : negate_op(intType ); break; 2371166675Srrs case Bytecodes::_lneg : negate_op(longType ); break; 2372275567Stuexen case Bytecodes::_fneg : negate_op(floatType ); break; 2373163953Srrs case Bytecodes::_dneg : negate_op(doubleType); break; 2374166675Srrs case Bytecodes::_ishl : shift_op(intType , code); break; 2375163953Srrs case Bytecodes::_lshl : shift_op(longType, code); break; 2376163953Srrs case Bytecodes::_ishr : shift_op(intType , code); break; 2377275567Stuexen case Bytecodes::_lshr : shift_op(longType, code); break; 2378221249Stuexen case Bytecodes::_iushr : shift_op(intType , code); break; 2379275567Stuexen case Bytecodes::_lushr : shift_op(longType, code); break; 2380171943Srrs case Bytecodes::_iand : logic_op(intType , code); break; 2381171943Srrs case Bytecodes::_land : logic_op(longType, code); break; 2382275567Stuexen case Bytecodes::_ior : logic_op(intType , code); break; 2383275567Stuexen case Bytecodes::_lor : logic_op(longType, code); break; 2384171943Srrs case Bytecodes::_ixor : logic_op(intType , code); break; 2385171943Srrs case Bytecodes::_lxor : logic_op(longType, code); break; 2386171943Srrs case Bytecodes::_iinc : increment(); break; 2387171943Srrs case Bytecodes::_i2l : convert(code, T_INT , T_LONG ); break; 2388171943Srrs case Bytecodes::_i2f : convert(code, T_INT , T_FLOAT ); break; 2389221249Stuexen case Bytecodes::_i2d : convert(code, T_INT , T_DOUBLE); break; 2390221249Stuexen case Bytecodes::_l2i : convert(code, T_LONG , T_INT ); break; 2391221249Stuexen case Bytecodes::_l2f : convert(code, T_LONG , T_FLOAT ); break; 2392275567Stuexen case Bytecodes::_l2d : convert(code, T_LONG , T_DOUBLE); break; 2393171943Srrs case Bytecodes::_f2i : convert(code, T_FLOAT , T_INT ); break; 2394171943Srrs case Bytecodes::_f2l : convert(code, T_FLOAT , T_LONG ); break; 2395275567Stuexen case Bytecodes::_f2d : convert(code, T_FLOAT , T_DOUBLE); break; 2396171943Srrs case Bytecodes::_d2i : convert(code, T_DOUBLE, T_INT ); break; 2397171943Srrs case Bytecodes::_d2l : convert(code, T_DOUBLE, T_LONG ); break; 2398171943Srrs case Bytecodes::_d2f : convert(code, T_DOUBLE, T_FLOAT ); break; 2399171943Srrs case Bytecodes::_i2b : convert(code, T_INT , T_BYTE ); break; 2400171943Srrs case Bytecodes::_i2c : convert(code, T_INT , T_CHAR ); break; 2401171943Srrs case Bytecodes::_i2s : convert(code, T_INT , T_SHORT ); break; 2402221249Stuexen case Bytecodes::_lcmp : compare_op(longType , code); break; 2403221249Stuexen case Bytecodes::_fcmpl : compare_op(floatType , code); break; 2404221249Stuexen case Bytecodes::_fcmpg : compare_op(floatType , code); break; 2405171943Srrs case Bytecodes::_dcmpl : compare_op(doubleType, code); break; 2406171943Srrs case Bytecodes::_dcmpg : compare_op(doubleType, code); break; 2407171943Srrs case Bytecodes::_ifeq : if_zero(intType , If::eql); break; 2408171943Srrs case Bytecodes::_ifne : if_zero(intType , If::neq); break; 2409171943Srrs case Bytecodes::_iflt : if_zero(intType , If::lss); break; 2410171943Srrs case Bytecodes::_ifge : if_zero(intType , If::geq); break; 2411275567Stuexen case Bytecodes::_ifgt : if_zero(intType , If::gtr); break; 2412224641Stuexen case Bytecodes::_ifle : if_zero(intType , If::leq); break; 2413163953Srrs case Bytecodes::_if_icmpeq : if_same(intType , If::eql); break; 2414275567Stuexen case Bytecodes::_if_icmpne : if_same(intType , If::neq); break; 2415224641Stuexen case Bytecodes::_if_icmplt : if_same(intType , If::lss); break; 2416163953Srrs case Bytecodes::_if_icmpge : if_same(intType , If::geq); break; 2417283666Stuexen case Bytecodes::_if_icmpgt : if_same(intType , If::gtr); break; 2418283666Stuexen case Bytecodes::_if_icmple : if_same(intType , If::leq); break; 2419283666Stuexen case Bytecodes::_if_acmpeq : if_same(objectType, If::eql); break; 2420283666Stuexen case Bytecodes::_if_acmpne : if_same(objectType, If::neq); break; 2421283666Stuexen case Bytecodes::_goto : _goto(s.cur_bci(), s.get_dest()); break; 2422283666Stuexen case Bytecodes::_jsr : jsr(s.get_dest()); break; 2423283666Stuexen case Bytecodes::_ret : ret(s.get_index()); break; 2424283666Stuexen case Bytecodes::_tableswitch : table_switch(); break; 2425283666Stuexen case Bytecodes::_lookupswitch : lookup_switch(); break; 2426283666Stuexen case Bytecodes::_ireturn : method_return(ipop()); break; 2427283666Stuexen case Bytecodes::_lreturn : method_return(lpop()); break; 2428283666Stuexen case Bytecodes::_freturn : method_return(fpop()); break; 2429283666Stuexen case Bytecodes::_dreturn : method_return(dpop()); break; 2430283666Stuexen case Bytecodes::_areturn : method_return(apop()); break; 2431283666Stuexen case Bytecodes::_return : method_return(NULL ); break; 2432163953Srrs case Bytecodes::_getstatic : // fall through 2433225635Stuexen case Bytecodes::_putstatic : // fall through 2434163953Srrs case Bytecodes::_getfield : // fall through 2435225635Stuexen case Bytecodes::_putfield : access_field(code); break; 2436163953Srrs case Bytecodes::_invokevirtual : // fall through 2437225635Stuexen case Bytecodes::_invokespecial : // fall through 2438163953Srrs case Bytecodes::_invokestatic : // fall through 2439225635Stuexen case Bytecodes::_invokedynamic : // fall through 2440284332Stuexen case Bytecodes::_invokeinterface: invoke(code); break; 2441284332Stuexen case Bytecodes::_new : new_instance(s.get_index_big()); break; 2442163953Srrs case Bytecodes::_newarray : new_type_array(); break; 2443163953Srrs case Bytecodes::_anewarray : new_object_array(); break; 2444225549Stuexen case Bytecodes::_arraylength : ipush(append(new ArrayLength(apop(), lock_stack()))); break; 2445226252Stuexen case Bytecodes::_athrow : throw_op(s.cur_bci()); break; 2446224870Stuexen case Bytecodes::_checkcast : check_cast(s.get_index_big()); break; 2447163953Srrs case Bytecodes::_instanceof : instance_of(s.get_index_big()); break; 2448167598Srrs // Note: we do not have special handling for the monitorenter bytecode if DeoptC1 && DeoptOnAsyncException 2449225549Stuexen case Bytecodes::_monitorenter : monitorenter(apop(), s.cur_bci()); break; 2450225549Stuexen case Bytecodes::_monitorexit : monitorexit (apop(), s.cur_bci()); break; 2451225549Stuexen case Bytecodes::_wide : ShouldNotReachHere(); break; 2452163953Srrs case Bytecodes::_multianewarray : new_multi_array(s.cur_bcp()[3]); break; 2453163953Srrs case Bytecodes::_ifnull : if_null(objectType, If::eql); break; 2454163953Srrs case Bytecodes::_ifnonnull : if_null(objectType, If::neq); break; 2455163953Srrs case Bytecodes::_goto_w : _goto(s.cur_bci(), s.get_far_dest()); break; 2456163953Srrs case Bytecodes::_jsr_w : jsr(s.get_far_dest()); break; 2457163953Srrs case Bytecodes::_breakpoint : BAILOUT_("concurrent setting of breakpoint", NULL); 2458163953Srrs default : ShouldNotReachHere(); break; 2459163953Srrs } 2460163953Srrs // save current bci to setup Goto at the end 2461283666Stuexen prev_bci = s.cur_bci(); 2462225549Stuexen } 2463226252Stuexen CHECK_BAILOUT_(NULL); 2464225549Stuexen // stop processing of this block (see try_inline_full) 2465225549Stuexen if (_skip_block) { 2466167598Srrs _skip_block = false; 2467225549Stuexen assert(_last && _last->as_BlockEnd(), ""); 2468225549Stuexen return _last->as_BlockEnd(); 2469225549Stuexen } 2470225549Stuexen // if there are any, check if last instruction is a BlockEnd instruction 2471163953Srrs BlockEnd* end = last()->as_BlockEnd(); 2472163953Srrs if (end == NULL) { 2473225635Stuexen // all blocks must end with a BlockEnd instruction => add a Goto 2474224641Stuexen end = new Goto(block_at(s.cur_bci()), false); 2475224641Stuexen _last = _last->set_next(end, prev_bci); 2476163953Srrs } 2477163953Srrs assert(end == last()->as_BlockEnd(), "inconsistency"); 2478225635Stuexen 2479225635Stuexen // if the method terminates, we don't need the stack anymore 2480225635Stuexen if (end->as_Return() != NULL) { 2481170056Srrs state()->clear_stack(); 2482170056Srrs } else if (end->as_Throw() != NULL) { 2483225635Stuexen // May have exception handler in caller scopes 2484163953Srrs state()->truncate_stack(scope()->lock_stack_size()); 2485163953Srrs } 2486163953Srrs 2487163953Srrs // connect to begin & set state 2488224918Stuexen // NOTE that inlining may have changed the block we are parsing 2489224918Stuexen block()->set_end(end); 2490224918Stuexen end->set_state(state()); 2491223132Stuexen // propagate state 2492223132Stuexen for (int i = end->number_of_sux() - 1; i >= 0; i--) { 2493223132Stuexen BlockBegin* sux = end->sux_at(i); 2494223132Stuexen assert(sux->is_predecessor(block()), "predecessor missing"); 2495223132Stuexen // be careful, bailout if bytecodes are strange 2496223132Stuexen if (!sux->try_merge(state())) BAILOUT_("block join failed", NULL); 2497225549Stuexen scope_data()->add_to_work_list(end->sux_at(i)); 2498226252Stuexen } 2499225549Stuexen 2500225549Stuexen scope_data()->set_stream(NULL); 2501167598Srrs 2502225549Stuexen // done 2503225549Stuexen return end; 2504225549Stuexen} 2505223132Stuexen 2506223132Stuexen 2507163953Srrsvoid GraphBuilder::iterate_all_blocks(bool start_in_current_block_for_inlining) { 2508223132Stuexen do { 2509223132Stuexen if (start_in_current_block_for_inlining && !bailed_out()) { 2510170056Srrs iterate_bytecodes_for_block(0); 2511223132Stuexen start_in_current_block_for_inlining = false; 2512223132Stuexen } else { 2513223132Stuexen BlockBegin* b; 2514223132Stuexen while ((b = scope_data()->remove_from_work_list()) != NULL) { 2515223132Stuexen if (!b->is_set(BlockBegin::was_visited_flag)) { 2516225635Stuexen if (b->is_set(BlockBegin::osr_entry_flag)) { 2517225635Stuexen // we're about to parse the osr entry block, so make sure 2518225635Stuexen // we setup the OSR edge leading into this block so that 2519225635Stuexen // Phis get setup correctly. 2520225635Stuexen setup_osr_entry_block(); 2521223132Stuexen // this is no longer the osr entry block, so clear it. 2522170056Srrs b->clear(BlockBegin::osr_entry_flag); 2523223132Stuexen } 2524223132Stuexen b->set(BlockBegin::was_visited_flag); 2525170056Srrs connect_to_end(b); 2526163953Srrs } 2527223132Stuexen } 2528223132Stuexen } 2529223132Stuexen } while (!bailed_out() && !scope_data()->is_work_list_empty()); 2530223132Stuexen} 2531163953Srrs 2532163953Srrs 2533163953Srrsbool GraphBuilder::_is_initialized = false; 2534163953Srrsbool GraphBuilder::_can_trap [Bytecodes::number_of_java_codes]; 2535163953Srrsbool GraphBuilder::_is_async[Bytecodes::number_of_java_codes]; 2536275567Stuexen 2537163953Srrsvoid GraphBuilder::initialize() { 2538275567Stuexen // make sure initialization happens only once (need a 2539275567Stuexen // lock here, if we allow the compiler to be re-entrant) 2540275567Stuexen if (is_initialized()) return; 2541275567Stuexen _is_initialized = true; 2542275567Stuexen 2543166675Srrs // the following bytecodes are assumed to potentially 2544166675Srrs // throw exceptions in compiled code - note that e.g. 2545166675Srrs // monitorexit & the return bytecodes do not throw 2546275567Stuexen // exceptions since monitor pairing proved that they 2547275567Stuexen // succeed (if monitor pairing succeeded) 2548275567Stuexen Bytecodes::Code can_trap_list[] = 2549275567Stuexen { Bytecodes::_ldc 2550275567Stuexen , Bytecodes::_ldc_w 2551275567Stuexen , Bytecodes::_ldc2_w 2552275567Stuexen , Bytecodes::_iaload 2553275567Stuexen , Bytecodes::_laload 2554275567Stuexen , Bytecodes::_faload 2555275567Stuexen , Bytecodes::_daload 2556275567Stuexen , Bytecodes::_aaload 2557166675Srrs , Bytecodes::_baload 2558275567Stuexen , Bytecodes::_caload 2559275567Stuexen , Bytecodes::_saload 2560275567Stuexen , Bytecodes::_iastore 2561275567Stuexen , Bytecodes::_lastore 2562275567Stuexen , Bytecodes::_fastore 2563275567Stuexen , Bytecodes::_dastore 2564275567Stuexen , Bytecodes::_aastore 2565275567Stuexen , Bytecodes::_bastore 2566166675Srrs , Bytecodes::_castore 2567166675Srrs , Bytecodes::_sastore 2568166675Srrs , Bytecodes::_idiv 2569166675Srrs , Bytecodes::_ldiv 2570166675Srrs , Bytecodes::_irem 2571166675Srrs , Bytecodes::_lrem 2572166675Srrs , Bytecodes::_getstatic 2573275567Stuexen , Bytecodes::_putstatic 2574166675Srrs , Bytecodes::_getfield 2575275567Stuexen , Bytecodes::_putfield 2576166675Srrs , Bytecodes::_invokevirtual 2577166675Srrs , Bytecodes::_invokespecial 2578163953Srrs , Bytecodes::_invokestatic 2579166675Srrs , Bytecodes::_invokedynamic 2580163953Srrs , Bytecodes::_invokeinterface 2581275567Stuexen , Bytecodes::_new 2582217635Srrs , Bytecodes::_newarray 2583217638Stuexen , Bytecodes::_anewarray 2584217635Srrs , Bytecodes::_arraylength 2585217635Srrs , Bytecodes::_athrow 2586217638Stuexen , Bytecodes::_checkcast 2587217635Srrs , Bytecodes::_instanceof 2588217635Srrs , Bytecodes::_monitorenter 2589217638Stuexen , Bytecodes::_multianewarray 2590217635Srrs }; 2591217635Srrs 2592166675Srrs // the following bytecodes are assumed to potentially 2593219014Stuexen // throw asynchronous exceptions in compiled code due 2594166675Srrs // to safepoints (note: these entries could be merged 2595166675Srrs // with the can_trap_list - however, we need to know 2596222029Stuexen // which ones are asynchronous for now - see also the 2597283666Stuexen // comment in GraphBuilder::handle_exception) 2598283666Stuexen Bytecodes::Code is_async_list[] = 2599283666Stuexen { Bytecodes::_ifeq 2600283666Stuexen , Bytecodes::_ifne 2601283666Stuexen , Bytecodes::_iflt 2602283666Stuexen , Bytecodes::_ifge 2603283666Stuexen , Bytecodes::_ifgt 2604283666Stuexen , Bytecodes::_ifle 2605283666Stuexen , Bytecodes::_if_icmpeq 2606283666Stuexen , Bytecodes::_if_icmpne 2607283666Stuexen , Bytecodes::_if_icmplt 2608283666Stuexen , Bytecodes::_if_icmpge 2609283666Stuexen , Bytecodes::_if_icmpgt 2610283666Stuexen , Bytecodes::_if_icmple 2611166675Srrs , Bytecodes::_if_acmpeq 2612223132Stuexen , Bytecodes::_if_acmpne 2613163953Srrs , Bytecodes::_goto 2614275567Stuexen , Bytecodes::_jsr 2615163953Srrs , Bytecodes::_ret 2616163953Srrs , Bytecodes::_tableswitch 2617171943Srrs , Bytecodes::_lookupswitch 2618163953Srrs , Bytecodes::_ireturn 2619163953Srrs , Bytecodes::_lreturn 2620223132Stuexen , Bytecodes::_freturn 2621163953Srrs , Bytecodes::_dreturn 2622163953Srrs , Bytecodes::_areturn 2623163953Srrs , Bytecodes::_return 2624163953Srrs , Bytecodes::_ifnull 2625163953Srrs , Bytecodes::_ifnonnull 2626166675Srrs , Bytecodes::_goto_w 2627163953Srrs , Bytecodes::_jsr_w 2628166675Srrs }; 2629223132Stuexen 2630163953Srrs // inititialize trap tables 2631163953Srrs for (int i = 0; i < Bytecodes::number_of_java_codes; i++) { 2632163953Srrs _can_trap[i] = false; 2633163953Srrs _is_async[i] = false; 2634163953Srrs } 2635163953Srrs // set standard trap info 2636166675Srrs for (uint j = 0; j < ARRAY_SIZE(can_trap_list); j++) { 2637166675Srrs _can_trap[can_trap_list[j]] = true; 2638163953Srrs } 2639163953Srrs 2640223132Stuexen // We now deoptimize if an asynchronous exception is thrown. This 2641163953Srrs // considerably cleans up corner case issues related to javac's 2642163953Srrs // incorrect exception handler ranges for async exceptions and 2643163953Srrs // allows us to precisely analyze the types of exceptions from 2644287282Stuexen // certain bytecodes. 2645173179Srrs if (!(DeoptC1 && DeoptOnAsyncException)) { 2646163953Srrs // set asynchronous trap info 2647163953Srrs for (uint k = 0; k < ARRAY_SIZE(is_async_list); k++) { 2648163953Srrs assert(!_can_trap[is_async_list[k]], "can_trap_list and is_async_list should be disjoint"); 2649163953Srrs _can_trap[is_async_list[k]] = true; 2650163953Srrs _is_async[is_async_list[k]] = true; 2651163953Srrs } 2652163953Srrs } 2653163953Srrs} 2654163953Srrs 2655163953Srrs 2656163953SrrsBlockBegin* GraphBuilder::header_block(BlockBegin* entry, BlockBegin::Flag f, ValueStack* state) { 2657163953Srrs assert(entry->is_set(f), "entry/flag mismatch"); 2658163953Srrs // create header block 2659163953Srrs BlockBegin* h = new BlockBegin(entry->bci()); 2660163953Srrs h->set_depth_first_number(0); 2661163953Srrs 2662163953Srrs Value l = h; 2663163953Srrs if (profile_branches()) { 2664163953Srrs // Increment the invocation count on entry to the method. We 2665163953Srrs // can't use profile_invocation here because append isn't setup to 2666163953Srrs // work properly at this point. The instruction have to be 2667163953Srrs // appended to the instruction stream by hand. 2668217635Srrs Value m = new Constant(new ObjectConstant(compilation()->method())); 2669217635Srrs h->set_next(m, 0); 2670217635Srrs Value p = new ProfileCounter(m, methodOopDesc::interpreter_invocation_counter_offset_in_bytes(), 1); 2671217635Srrs m->set_next(p, 0); 2672217638Stuexen l = p; 2673217635Srrs } 2674217635Srrs 2675217638Stuexen BlockEnd* g = new Goto(entry, false); 2676217635Srrs l->set_next(g, entry->bci()); 2677217635Srrs h->set_end(g); 2678163953Srrs h->set(f); 2679219014Stuexen // setup header block end state 2680163953Srrs ValueStack* s = state->copy(); // can use copy since stack is empty (=> no phis) 2681163953Srrs assert(s->stack_is_empty(), "must have empty stack at entry point"); 2682283666Stuexen g->set_state(s); 2683283666Stuexen return h; 2684283666Stuexen} 2685283666Stuexen 2686283666Stuexen 2687283666Stuexen 2688283666StuexenBlockBegin* GraphBuilder::setup_start_block(int osr_bci, BlockBegin* std_entry, BlockBegin* osr_entry, ValueStack* state) { 2689283666Stuexen BlockBegin* start = new BlockBegin(0); 2690283666Stuexen 2691283666Stuexen // This code eliminates the empty start block at the beginning of 2692283666Stuexen // each method. Previously, each method started with the 2693283666Stuexen // start-block created below, and this block was followed by the 2694283666Stuexen // header block that was always empty. This header block is only 2695283666Stuexen // necesary if std_entry is also a backward branch target because 2696163953Srrs // then phi functions may be necessary in the header block. It's 2697163953Srrs // also necessary when profiling so that there's a single block that 2698223132Stuexen // can increment the interpreter_invocation_count. 2699223132Stuexen BlockBegin* new_header_block; 2700163953Srrs if (std_entry->number_of_preds() == 0 && !profile_branches()) { 2701163953Srrs new_header_block = std_entry; 2702163953Srrs } else { 2703163953Srrs new_header_block = header_block(std_entry, BlockBegin::std_entry_flag, state); 2704163953Srrs } 2705166675Srrs 2706166675Srrs // setup start block (root for the IR graph) 2707166675Srrs Base* base = 2708166675Srrs new Base( 2709166675Srrs new_header_block, 2710166675Srrs osr_entry 2711166675Srrs ); 2712166675Srrs start->set_next(base, 0); 2713166675Srrs start->set_end(base); 2714224918Stuexen // create & setup state for start block 2715224918Stuexen start->set_state(state->copy()); 2716224918Stuexen base->set_state(state->copy()); 2717223132Stuexen 2718223132Stuexen if (base->std_entry()->state() == NULL) { 2719223132Stuexen // setup states for header blocks 2720223132Stuexen base->std_entry()->merge(state); 2721223132Stuexen } 2722223132Stuexen 2723223132Stuexen assert(base->std_entry()->state() != NULL, ""); 2724223132Stuexen return start; 2725223132Stuexen} 2726163953Srrs 2727223132Stuexen 2728223132Stuexenvoid GraphBuilder::setup_osr_entry_block() { 2729223132Stuexen assert(compilation()->is_osr_compile(), "only for osrs"); 2730223132Stuexen 2731163953Srrs int osr_bci = compilation()->osr_bci(); 2732215410Stuexen ciBytecodeStream s(method()); 2733215410Stuexen s.reset_to_bci(osr_bci); 2734215410Stuexen s.next(); 2735215410Stuexen scope_data()->set_stream(&s); 2736215410Stuexen 2737215410Stuexen // create a new block to be the osr setup code 2738215410Stuexen _osr_entry = new BlockBegin(osr_bci); 2739215410Stuexen _osr_entry->set(BlockBegin::osr_entry_flag); 2740215410Stuexen _osr_entry->set_depth_first_number(0); 2741215410Stuexen BlockBegin* target = bci2block()->at(osr_bci); 2742215410Stuexen assert(target != NULL && target->is_set(BlockBegin::osr_entry_flag), "must be there"); 2743215410Stuexen // the osr entry has no values for locals 2744215410Stuexen ValueStack* state = target->state()->copy(); 2745215410Stuexen _osr_entry->set_state(state); 2746215410Stuexen 2747215410Stuexen kill_all(); 2748223132Stuexen _block = _osr_entry; 2749215410Stuexen _state = _osr_entry->state()->copy(); 2750223132Stuexen _last = _osr_entry; 2751215410Stuexen Value e = append(new OsrEntry()); 2752215410Stuexen e->set_needs_null_check(false); 2753223132Stuexen 2754215410Stuexen // OSR buffer is 2755163953Srrs // 2756163953Srrs // locals[nlocals-1..0] 2757163953Srrs // monitors[number_of_locks-1..0] 2758163953Srrs // 2759166675Srrs // locals is a direct copy of the interpreter frame so in the osr buffer 2760166675Srrs // so first slot in the local array is the last local from the interpreter 2761163953Srrs // and last slot is local[0] (receiver) from the interpreter 2762163953Srrs // 2763171477Srrs // Similarly with locks. The first lock slot in the osr buffer is the nth lock 2764163953Srrs // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock 2765163953Srrs // in the interpreter frame (the method lock if a sync method) 2766163953Srrs 2767163953Srrs // Initialize monitors in the compiled activation. 2768163953Srrs 2769163953Srrs int index; 2770224918Stuexen Value local; 2771224918Stuexen 2772224918Stuexen // find all the locals that the interpreter thinks contain live oops 2773223132Stuexen const BitMap live_oops = method()->live_local_oops_at_bci(osr_bci); 2774223132Stuexen 2775223132Stuexen // compute the offset into the locals so that we can treat the buffer 2776223132Stuexen // as if the locals were still in the interpreter frame 2777223132Stuexen int locals_offset = BytesPerWord * (method()->max_locals() - 1); 2778223132Stuexen for_each_local_value(state, index, local) { 2779223132Stuexen int offset = locals_offset - (index + local->type()->size() - 1) * BytesPerWord; 2780223132Stuexen Value get; 2781223132Stuexen if (local->type()->is_object_kind() && !live_oops.at(index)) { 2782223132Stuexen // The interpreter thinks this local is dead but the compiler 2783223132Stuexen // doesn't so pretend that the interpreter passed in null. 2784163953Srrs get = append(new Constant(objectNull)); 2785223132Stuexen } else { 2786223132Stuexen get = append(new UnsafeGetRaw(as_BasicType(local->type()), e, 2787223132Stuexen append(new Constant(new IntConstant(offset))), 2788223132Stuexen 0, 2789163953Srrs true)); 2790163953Srrs } 2791163953Srrs _state->store_local(index, get); 2792163953Srrs } 2793163953Srrs 2794166675Srrs // the storage for the OSR buffer is freed manually in the LIRGenerator. 2795166675Srrs 2796166675Srrs assert(state->caller_state() == NULL, "should be top scope"); 2797166675Srrs state->clear_locals(); 2798170056Srrs Goto* g = new Goto(target, false); 2799166675Srrs g->set_state(_state->copy()); 2800166675Srrs append(g); 2801224918Stuexen _osr_entry->set_end(g); 2802224918Stuexen target->merge(_osr_entry->end()->state()); 2803224918Stuexen 2804223132Stuexen scope_data()->set_stream(NULL); 2805223132Stuexen} 2806223132Stuexen 2807223132Stuexen 2808223132StuexenValueStack* GraphBuilder::state_at_entry() { 2809223132Stuexen ValueStack* state = new ValueStack(scope(), method()->max_locals(), method()->max_stack()); 2810223132Stuexen 2811163953Srrs // Set up locals for receiver 2812223132Stuexen int idx = 0; 2813223132Stuexen if (!method()->is_static()) { 2814223132Stuexen // we should always see the receiver 2815223132Stuexen state->store_local(idx, new Local(objectType, idx)); 2816163953Srrs idx = 1; 2817163953Srrs } 2818163953Srrs 2819163953Srrs // Set up locals for incoming arguments 2820163953Srrs ciSignature* sig = method()->signature(); 2821166675Srrs for (int i = 0; i < sig->count(); i++) { 2822163953Srrs ciType* type = sig->type_at(i); 2823163953Srrs BasicType basic_type = type->basic_type(); 2824163953Srrs // don't allow T_ARRAY to propagate into locals types 2825163953Srrs if (basic_type == T_ARRAY) basic_type = T_OBJECT; 2826163953Srrs ValueType* vt = as_ValueType(basic_type); 2827163953Srrs state->store_local(idx, new Local(vt, idx)); 2828223132Stuexen idx += type->size(); 2829223132Stuexen } 2830163953Srrs 2831163953Srrs // lock synchronized method 2832163953Srrs if (method()->is_synchronized()) { 2833163953Srrs state->lock(scope(), NULL); 2834163953Srrs } 2835163953Srrs 2836166675Srrs return state; 2837166675Srrs} 2838166675Srrs 2839166675Srrs 2840275567StuexenGraphBuilder::GraphBuilder(Compilation* compilation, IRScope* scope) 2841170056Srrs : _scope_data(NULL) 2842275567Stuexen , _exception_state(NULL) 2843275567Stuexen , _instruction_count(0) 2844275567Stuexen , _osr_entry(NULL) 2845275567Stuexen , _memory(new MemoryBuffer()) 2846275567Stuexen , _compilation(compilation) 2847275567Stuexen , _inline_bailout_msg(NULL) 2848275567Stuexen{ 2849275567Stuexen int osr_bci = compilation->osr_bci(); 2850275567Stuexen 2851275567Stuexen // determine entry points and bci2block mapping 2852275567Stuexen BlockListBuilder blm(compilation, scope, osr_bci); 2853275567Stuexen CHECK_BAILOUT(); 2854275567Stuexen 2855275567Stuexen BlockList* bci2block = blm.bci2block(); 2856275567Stuexen BlockBegin* start_block = bci2block->at(0); 2857275567Stuexen 2858275567Stuexen assert(is_initialized(), "GraphBuilder must have been initialized"); 2859275567Stuexen push_root_scope(scope, bci2block, start_block); 2860275567Stuexen 2861275567Stuexen // setup state for std entry 2862275567Stuexen _initial_state = state_at_entry(); 2863275567Stuexen start_block->merge(_initial_state); 2864275567Stuexen 2865275567Stuexen // complete graph 2866166675Srrs _vmap = new ValueMap(); 2867223132Stuexen scope->compute_lock_stack_size(); 2868166675Srrs switch (scope->method()->intrinsic_id()) { 2869223132Stuexen case vmIntrinsics::_dabs : // fall through 2870163953Srrs case vmIntrinsics::_dsqrt : // fall through 2871163953Srrs case vmIntrinsics::_dsin : // fall through 2872223132Stuexen case vmIntrinsics::_dcos : // fall through 2873163953Srrs case vmIntrinsics::_dtan : // fall through 2874163953Srrs case vmIntrinsics::_dlog : // fall through 2875163953Srrs case vmIntrinsics::_dlog10 : // fall through 2876163953Srrs { 2877163953Srrs // Compiles where the root method is an intrinsic need a special 2878163953Srrs // compilation environment because the bytecodes for the method 2879163953Srrs // shouldn't be parsed during the compilation, only the special 2880163953Srrs // Intrinsic node should be emitted. If this isn't done the the 2881166675Srrs // code for the inlined version will be different than the root 2882166675Srrs // compiled version which could lead to monotonicity problems on 2883163953Srrs // intel. 2884163953Srrs 2885163953Srrs // Set up a stream so that appending instructions works properly. 2886163953Srrs ciBytecodeStream s(scope->method()); 2887166675Srrs s.reset_to_bci(0); 2888168299Srrs scope_data()->set_stream(&s); 2889163953Srrs s.next(); 2890163953Srrs 2891163953Srrs // setup the initial block state 2892163953Srrs _block = start_block; 2893163953Srrs _state = start_block->state()->copy(); 2894166675Srrs _last = start_block; 2895223132Stuexen load_local(doubleType, 0); 2896163953Srrs 2897163953Srrs // Emit the intrinsic node. 2898163953Srrs bool result = try_inline_intrinsics(scope->method()); 2899163953Srrs if (!result) BAILOUT("failed to inline intrinsic"); 2900163953Srrs method_return(dpop()); 2901181054Srrs 2902181054Srrs // connect the begin and end blocks and we're all done. 2903163953Srrs BlockEnd* end = last()->as_BlockEnd(); 2904181054Srrs block()->set_end(end); 2905163953Srrs end->set_state(state()); 2906166675Srrs break; 2907163953Srrs } 2908163953Srrs default: 2909163953Srrs scope_data()->add_to_work_list(start_block); 2910163953Srrs iterate_all_blocks(); 2911163953Srrs break; 2912163953Srrs } 2913166675Srrs CHECK_BAILOUT(); 2914166675Srrs 2915166675Srrs _start = setup_start_block(osr_bci, start_block, _osr_entry, _initial_state); 2916166675Srrs 2917163953Srrs eliminate_redundant_phis(_start); 2918185694Srrs 2919163953Srrs NOT_PRODUCT(if (PrintValueNumbering && Verbose) print_stats()); 2920163953Srrs // for osr compile, bailout if some requirements are not fulfilled 2921224918Stuexen if (osr_bci != -1) { 2922224918Stuexen BlockBegin* osr_block = blm.bci2block()->at(osr_bci); 2923224918Stuexen assert(osr_block->is_set(BlockBegin::was_visited_flag),"osr entry must have been visited for osr compile"); 2924223132Stuexen 2925223132Stuexen // check if osr entry point has empty stack - we cannot handle non-empty stacks at osr entry points 2926223132Stuexen if (!osr_block->state()->stack_is_empty()) { 2927223132Stuexen BAILOUT("stack not empty at OSR entry point"); 2928223132Stuexen } 2929223132Stuexen } 2930223132Stuexen#ifndef PRODUCT 2931223132Stuexen if (PrintCompilation && Verbose) tty->print_cr("Created %d Instructions", _instruction_count); 2932163953Srrs#endif 2933223132Stuexen} 2934223132Stuexen 2935223132Stuexen 2936163953SrrsValueStack* GraphBuilder::lock_stack() { 2937163953Srrs // return a new ValueStack representing just the current lock stack 2938163953Srrs // (for debug info at safepoints in exception throwing or handling) 2939163953Srrs ValueStack* new_stack = state()->copy_locks(); 2940163953Srrs return new_stack; 2941163953Srrs} 2942166675Srrs 2943163953Srrs 2944166675Srrsint GraphBuilder::recursive_inline_level(ciMethod* cur_callee) const { 2945166675Srrs int recur_level = 0; 2946166675Srrs for (IRScope* s = scope(); s != NULL; s = s->caller()) { 2947166675Srrs if (s->method() == cur_callee) { 2948163953Srrs ++recur_level; 2949163953Srrs } 2950163953Srrs } 2951163953Srrs return recur_level; 2952166675Srrs} 2953163953Srrs 2954171943Srrs 2955166675Srrsbool GraphBuilder::try_inline(ciMethod* callee, bool holder_known) { 2956166675Srrs // Clear out any existing inline bailout condition 2957169420Srrs clear_inline_bailout(); 2958234832Stuexen 2959223132Stuexen if (callee->should_exclude()) { 2960163953Srrs // callee is excluded 2961163953Srrs INLINE_BAILOUT("excluded by CompilerOracle") 2962163953Srrs } else if (!callee->can_be_compiled()) { 2963224918Stuexen // callee is not compilable (prob. has breakpoints) 2964224918Stuexen INLINE_BAILOUT("not compilable") 2965224918Stuexen } else if (callee->intrinsic_id() != vmIntrinsics::_none && try_inline_intrinsics(callee)) { 2966223132Stuexen // intrinsics can be native or not 2967223132Stuexen return true; 2968223132Stuexen } else if (callee->is_native()) { 2969223132Stuexen // non-intrinsic natives cannot be inlined 2970223132Stuexen INLINE_BAILOUT("non-intrinsic native") 2971223132Stuexen } else if (callee->is_abstract()) { 2972223132Stuexen INLINE_BAILOUT("abstract") 2973223132Stuexen } else { 2974223132Stuexen return try_inline_full(callee, holder_known); 2975223132Stuexen } 2976223132Stuexen} 2977234832Stuexen 2978223132Stuexen 2979223132Stuexenbool GraphBuilder::try_inline_intrinsics(ciMethod* callee) { 2980223132Stuexen if (!InlineNatives ) INLINE_BAILOUT("intrinsic method inlining disabled"); 2981223132Stuexen if (callee->is_synchronized()) { 2982223132Stuexen // We don't currently support any synchronized intrinsics 2983163953Srrs return false; 2984163953Srrs } 2985163953Srrs 2986163953Srrs // callee seems like a good candidate 2987163953Srrs // determine id 2988163953Srrs bool preserves_state = false; 2989163953Srrs bool cantrap = true; 2990163953Srrs vmIntrinsics::ID id = callee->intrinsic_id(); 2991163953Srrs switch (id) { 2992166675Srrs case vmIntrinsics::_arraycopy : 2993163953Srrs if (!InlineArrayCopy) return false; 2994166675Srrs break; 2995166675Srrs 2996166675Srrs case vmIntrinsics::_currentTimeMillis: 2997166675Srrs case vmIntrinsics::_nanoTime: 2998166675Srrs preserves_state = true; 2999166675Srrs cantrap = false; 3000166675Srrs break; 3001166675Srrs 3002166675Srrs case vmIntrinsics::_floatToRawIntBits : 3003166675Srrs case vmIntrinsics::_intBitsToFloat : 3004171943Srrs case vmIntrinsics::_doubleToRawLongBits : 3005166675Srrs case vmIntrinsics::_longBitsToDouble : 3006166675Srrs if (!InlineMathNatives) return false; 3007169420Srrs preserves_state = true; 3008234832Stuexen cantrap = false; 3009223132Stuexen break; 3010166675Srrs 3011166675Srrs case vmIntrinsics::_getClass : 3012166675Srrs if (!InlineClassNatives) return false; 3013171943Srrs preserves_state = true; 3014163953Srrs break; 3015163953Srrs 3016163953Srrs case vmIntrinsics::_currentThread : 3017163953Srrs if (!InlineThreadNatives) return false; 3018223132Stuexen preserves_state = true; 3019223132Stuexen cantrap = false; 3020223132Stuexen break; 3021223132Stuexen 3022163953Srrs case vmIntrinsics::_dabs : // fall through 3023223132Stuexen case vmIntrinsics::_dsqrt : // fall through 3024223132Stuexen case vmIntrinsics::_dsin : // fall through 3025163953Srrs case vmIntrinsics::_dcos : // fall through 3026223132Stuexen case vmIntrinsics::_dtan : // fall through 3027223132Stuexen case vmIntrinsics::_dlog : // fall through 3028223132Stuexen case vmIntrinsics::_dlog10 : // fall through 3029223132Stuexen if (!InlineMathNatives) return false; 3030223132Stuexen cantrap = false; 3031223132Stuexen preserves_state = true; 3032223132Stuexen break; 3033223132Stuexen 3034223132Stuexen // sun/misc/AtomicLong.attemptUpdate 3035223132Stuexen case vmIntrinsics::_attemptUpdate : 3036223132Stuexen if (!VM_Version::supports_cx8()) return false; 3037223132Stuexen if (!InlineAtomicLong) return false; 3038223132Stuexen preserves_state = true; 3039223132Stuexen break; 3040223132Stuexen 3041223132Stuexen // Use special nodes for Unsafe instructions so we can more easily 3042223132Stuexen // perform an address-mode optimization on the raw variants 3043223132Stuexen case vmIntrinsics::_getObject : return append_unsafe_get_obj(callee, T_OBJECT, false); 3044223132Stuexen case vmIntrinsics::_getBoolean: return append_unsafe_get_obj(callee, T_BOOLEAN, false); 3045223132Stuexen case vmIntrinsics::_getByte : return append_unsafe_get_obj(callee, T_BYTE, false); 3046223132Stuexen case vmIntrinsics::_getShort : return append_unsafe_get_obj(callee, T_SHORT, false); 3047223132Stuexen case vmIntrinsics::_getChar : return append_unsafe_get_obj(callee, T_CHAR, false); 3048223132Stuexen case vmIntrinsics::_getInt : return append_unsafe_get_obj(callee, T_INT, false); 3049223132Stuexen case vmIntrinsics::_getLong : return append_unsafe_get_obj(callee, T_LONG, false); 3050223132Stuexen case vmIntrinsics::_getFloat : return append_unsafe_get_obj(callee, T_FLOAT, false); 3051223132Stuexen case vmIntrinsics::_getDouble : return append_unsafe_get_obj(callee, T_DOUBLE, false); 3052223132Stuexen 3053223132Stuexen case vmIntrinsics::_putObject : return append_unsafe_put_obj(callee, T_OBJECT, false); 3054223132Stuexen case vmIntrinsics::_putBoolean: return append_unsafe_put_obj(callee, T_BOOLEAN, false); 3055223132Stuexen case vmIntrinsics::_putByte : return append_unsafe_put_obj(callee, T_BYTE, false); 3056223132Stuexen case vmIntrinsics::_putShort : return append_unsafe_put_obj(callee, T_SHORT, false); 3057223132Stuexen case vmIntrinsics::_putChar : return append_unsafe_put_obj(callee, T_CHAR, false); 3058223132Stuexen case vmIntrinsics::_putInt : return append_unsafe_put_obj(callee, T_INT, false); 3059223132Stuexen case vmIntrinsics::_putLong : return append_unsafe_put_obj(callee, T_LONG, false); 3060223132Stuexen case vmIntrinsics::_putFloat : return append_unsafe_put_obj(callee, T_FLOAT, false); 3061223132Stuexen case vmIntrinsics::_putDouble : return append_unsafe_put_obj(callee, T_DOUBLE, false); 3062235009Stuexen 3063235009Stuexen case vmIntrinsics::_getObjectVolatile : return append_unsafe_get_obj(callee, T_OBJECT, true); 3064235009Stuexen case vmIntrinsics::_getBooleanVolatile: return append_unsafe_get_obj(callee, T_BOOLEAN, true); 3065235009Stuexen case vmIntrinsics::_getByteVolatile : return append_unsafe_get_obj(callee, T_BYTE, true); 3066235009Stuexen case vmIntrinsics::_getShortVolatile : return append_unsafe_get_obj(callee, T_SHORT, true); 3067235009Stuexen case vmIntrinsics::_getCharVolatile : return append_unsafe_get_obj(callee, T_CHAR, true); 3068235075Stuexen case vmIntrinsics::_getIntVolatile : return append_unsafe_get_obj(callee, T_INT, true); 3069235075Stuexen case vmIntrinsics::_getLongVolatile : return append_unsafe_get_obj(callee, T_LONG, true); 3070235075Stuexen case vmIntrinsics::_getFloatVolatile : return append_unsafe_get_obj(callee, T_FLOAT, true); 3071223132Stuexen case vmIntrinsics::_getDoubleVolatile : return append_unsafe_get_obj(callee, T_DOUBLE, true); 3072223132Stuexen 3073223132Stuexen case vmIntrinsics::_putObjectVolatile : return append_unsafe_put_obj(callee, T_OBJECT, true); 3074223132Stuexen case vmIntrinsics::_putBooleanVolatile: return append_unsafe_put_obj(callee, T_BOOLEAN, true); 3075223132Stuexen case vmIntrinsics::_putByteVolatile : return append_unsafe_put_obj(callee, T_BYTE, true); 3076223132Stuexen case vmIntrinsics::_putShortVolatile : return append_unsafe_put_obj(callee, T_SHORT, true); 3077223132Stuexen case vmIntrinsics::_putCharVolatile : return append_unsafe_put_obj(callee, T_CHAR, true); 3078223132Stuexen case vmIntrinsics::_putIntVolatile : return append_unsafe_put_obj(callee, T_INT, true); 3079223132Stuexen case vmIntrinsics::_putLongVolatile : return append_unsafe_put_obj(callee, T_LONG, true); 3080223132Stuexen case vmIntrinsics::_putFloatVolatile : return append_unsafe_put_obj(callee, T_FLOAT, true); 3081223132Stuexen case vmIntrinsics::_putDoubleVolatile : return append_unsafe_put_obj(callee, T_DOUBLE, true); 3082224918Stuexen 3083224918Stuexen case vmIntrinsics::_getByte_raw : return append_unsafe_get_raw(callee, T_BYTE); 3084224918Stuexen case vmIntrinsics::_getShort_raw : return append_unsafe_get_raw(callee, T_SHORT); 3085223132Stuexen case vmIntrinsics::_getChar_raw : return append_unsafe_get_raw(callee, T_CHAR); 3086223132Stuexen case vmIntrinsics::_getInt_raw : return append_unsafe_get_raw(callee, T_INT); 3087223132Stuexen case vmIntrinsics::_getLong_raw : return append_unsafe_get_raw(callee, T_LONG); 3088223132Stuexen case vmIntrinsics::_getFloat_raw : return append_unsafe_get_raw(callee, T_FLOAT); 3089223132Stuexen case vmIntrinsics::_getDouble_raw : return append_unsafe_get_raw(callee, T_DOUBLE); 3090223132Stuexen 3091223132Stuexen case vmIntrinsics::_putByte_raw : return append_unsafe_put_raw(callee, T_BYTE); 3092223132Stuexen case vmIntrinsics::_putShort_raw : return append_unsafe_put_raw(callee, T_SHORT); 3093223132Stuexen case vmIntrinsics::_putChar_raw : return append_unsafe_put_raw(callee, T_CHAR); 3094223132Stuexen case vmIntrinsics::_putInt_raw : return append_unsafe_put_raw(callee, T_INT); 3095223132Stuexen case vmIntrinsics::_putLong_raw : return append_unsafe_put_raw(callee, T_LONG); 3096223132Stuexen case vmIntrinsics::_putFloat_raw : return append_unsafe_put_raw(callee, T_FLOAT); 3097223132Stuexen case vmIntrinsics::_putDouble_raw : return append_unsafe_put_raw(callee, T_DOUBLE); 3098223132Stuexen 3099223132Stuexen case vmIntrinsics::_prefetchRead : return append_unsafe_prefetch(callee, false, false); 3100223132Stuexen case vmIntrinsics::_prefetchWrite : return append_unsafe_prefetch(callee, false, true); 3101223132Stuexen case vmIntrinsics::_prefetchReadStatic : return append_unsafe_prefetch(callee, true, false); 3102223132Stuexen case vmIntrinsics::_prefetchWriteStatic : return append_unsafe_prefetch(callee, true, true); 3103223132Stuexen 3104223132Stuexen case vmIntrinsics::_checkIndex : 3105223132Stuexen if (!InlineNIOCheckIndex) return false; 3106223132Stuexen preserves_state = true; 3107230104Stuexen break; 3108223132Stuexen case vmIntrinsics::_putOrderedObject : return append_unsafe_put_obj(callee, T_OBJECT, true); 3109223132Stuexen case vmIntrinsics::_putOrderedInt : return append_unsafe_put_obj(callee, T_INT, true); 3110223132Stuexen case vmIntrinsics::_putOrderedLong : return append_unsafe_put_obj(callee, T_LONG, true); 3111223132Stuexen 3112223132Stuexen case vmIntrinsics::_compareAndSwapLong: 3113223132Stuexen if (!VM_Version::supports_cx8()) return false; 3114223132Stuexen // fall through 3115223132Stuexen case vmIntrinsics::_compareAndSwapInt: 3116223132Stuexen case vmIntrinsics::_compareAndSwapObject: 3117223132Stuexen append_unsafe_CAS(callee); 3118223132Stuexen return true; 3119223132Stuexen 3120223132Stuexen default : return false; // do not inline 3121223132Stuexen } 3122223132Stuexen // create intrinsic node 3123223132Stuexen const bool has_receiver = !callee->is_static(); 3124223132Stuexen ValueType* result_type = as_ValueType(callee->return_type()); 3125223132Stuexen 3126230104Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3127223132Stuexen ValueStack* locks = lock_stack(); 3128223132Stuexen if (profile_calls()) { 3129223132Stuexen // Don't profile in the special case where the root method 3130223132Stuexen // is the intrinsic 3131223132Stuexen if (callee != method()) { 3132223132Stuexen Value recv = NULL; 3133223132Stuexen if (has_receiver) { 3134223132Stuexen recv = args->at(0); 3135223132Stuexen null_check(recv); 3136223132Stuexen } 3137223132Stuexen profile_call(recv, NULL); 3138223132Stuexen } 3139223132Stuexen } 3140223132Stuexen 3141223132Stuexen Intrinsic* result = new Intrinsic(result_type, id, args, has_receiver, lock_stack(), 3142223132Stuexen preserves_state, cantrap); 3143223132Stuexen // append instruction & push result 3144223132Stuexen Value value = append_split(result); 3145223132Stuexen if (result_type != voidType) push(result_type, value); 3146223132Stuexen 3147223162Stuexen#ifndef PRODUCT 3148223132Stuexen // printing 3149223132Stuexen if (PrintInlining) { 3150223132Stuexen print_inline_result(callee, true); 3151223132Stuexen } 3152224918Stuexen#endif 3153224918Stuexen 3154224918Stuexen // done 3155223132Stuexen return true; 3156223132Stuexen} 3157223132Stuexen 3158223162Stuexen 3159223132Stuexenbool GraphBuilder::try_inline_jsr(int jsr_dest_bci) { 3160223132Stuexen // Introduce a new callee continuation point - all Ret instructions 3161223132Stuexen // will be replaced with Gotos to this point. 3162223132Stuexen BlockBegin* cont = block_at(next_bci()); 3163223132Stuexen assert(cont != NULL, "continuation must exist (BlockListBuilder starts a new block after a jsr"); 3164223132Stuexen 3165223132Stuexen // Note: can not assign state to continuation yet, as we have to 3166223132Stuexen // pick up the state from the Ret instructions. 3167223132Stuexen 3168223132Stuexen // Push callee scope 3169223132Stuexen push_scope_for_jsr(cont, jsr_dest_bci); 3170223132Stuexen 3171223132Stuexen // Temporarily set up bytecode stream so we can append instructions 3172223162Stuexen // (only using the bci of this stream) 3173223162Stuexen scope_data()->set_stream(scope_data()->parent()->stream()); 3174223162Stuexen 3175223162Stuexen BlockBegin* jsr_start_block = block_at(jsr_dest_bci); 3176223162Stuexen assert(jsr_start_block != NULL, "jsr start block must exist"); 3177223162Stuexen assert(!jsr_start_block->is_set(BlockBegin::was_visited_flag), "should not have visited jsr yet"); 3178223162Stuexen Goto* goto_sub = new Goto(jsr_start_block, false); 3179223162Stuexen goto_sub->set_state(state()); 3180223162Stuexen // Must copy state to avoid wrong sharing when parsing bytecodes 3181223162Stuexen assert(jsr_start_block->state() == NULL, "should have fresh jsr starting block"); 3182223162Stuexen jsr_start_block->set_state(state()->copy()); 3183223162Stuexen append(goto_sub); 3184224918Stuexen _block->set_end(goto_sub); 3185224918Stuexen _last = _block = jsr_start_block; 3186224918Stuexen 3187223162Stuexen // Clear out bytecode stream 3188223162Stuexen scope_data()->set_stream(NULL); 3189223162Stuexen 3190223162Stuexen scope_data()->add_to_work_list(jsr_start_block); 3191223162Stuexen 3192223162Stuexen // Ready to resume parsing in subroutine 3193223162Stuexen iterate_all_blocks(); 3194223162Stuexen 3195223162Stuexen // If we bailed out during parsing, return immediately (this is bad news) 3196223162Stuexen CHECK_BAILOUT_(false); 3197223162Stuexen 3198223162Stuexen // Detect whether the continuation can actually be reached. If not, 3199223162Stuexen // it has not had state set by the join() operations in 3200223162Stuexen // iterate_bytecodes_for_block()/ret() and we should not touch the 3201224641Stuexen // iteration state. The calling activation of 3202224641Stuexen // iterate_bytecodes_for_block will then complete normally. 3203224641Stuexen if (cont->state() != NULL) { 3204224641Stuexen if (!cont->is_set(BlockBegin::was_visited_flag)) { 3205275567Stuexen // add continuation to work list instead of parsing it immediately 3206224641Stuexen scope_data()->parent()->add_to_work_list(cont); 3207275567Stuexen } 3208275567Stuexen } 3209275567Stuexen 3210275567Stuexen assert(jsr_continuation() == cont, "continuation must not have changed"); 3211275567Stuexen assert(!jsr_continuation()->is_set(BlockBegin::was_visited_flag) || 3212224641Stuexen jsr_continuation()->is_set(BlockBegin::parser_loop_header_flag), 3213224641Stuexen "continuation can only be visited in case of backward branches"); 3214224641Stuexen assert(_last && _last->as_BlockEnd(), "block must have end"); 3215275567Stuexen 3216275567Stuexen // continuation is in work list, so end iteration of current block 3217275567Stuexen _skip_block = true; 3218275567Stuexen pop_scope_for_jsr(); 3219275567Stuexen 3220275567Stuexen return true; 3221275567Stuexen} 3222275567Stuexen 3223275567Stuexen 3224275567Stuexen// Inline the entry of a synchronized method as a monitor enter and 3225275567Stuexen// register the exception handler which releases the monitor if an 3226224641Stuexen// exception is thrown within the callee. Note that the monitor enter 3227275567Stuexen// cannot throw an exception itself, because the receiver is 3228275567Stuexen// guaranteed to be non-null by the explicit null check at the 3229275567Stuexen// beginning of inlining. 3230275567Stuexenvoid GraphBuilder::inline_sync_entry(Value lock, BlockBegin* sync_handler) { 3231275567Stuexen assert(lock != NULL && sync_handler != NULL, "lock or handler missing"); 3232275567Stuexen 3233275567Stuexen set_exception_state(state()->copy()); 3234275567Stuexen monitorenter(lock, SynchronizationEntryBCI); 3235224641Stuexen assert(_last->as_MonitorEnter() != NULL, "monitor enter expected"); 3236224641Stuexen _last->set_needs_null_check(false); 3237224641Stuexen 3238224641Stuexen sync_handler->set(BlockBegin::exception_entry_flag); 3239224641Stuexen sync_handler->set(BlockBegin::is_on_work_list_flag); 3240224641Stuexen 3241224641Stuexen ciExceptionHandler* desc = new ciExceptionHandler(method()->holder(), 0, method()->code_size(), -1, 0); 3242275567Stuexen XHandler* h = new XHandler(desc); 3243224641Stuexen h->set_entry_block(sync_handler); 3244275567Stuexen scope_data()->xhandlers()->append(h); 3245224641Stuexen scope_data()->set_has_handler(); 3246224641Stuexen} 3247224641Stuexen 3248224641Stuexen 3249275567Stuexen// If an exception is thrown and not handled within an inlined 3250224641Stuexen// synchronized method, the monitor must be released before the 3251275567Stuexen// exception is rethrown in the outer scope. Generate the appropriate 3252224641Stuexen// instructions here. 3253224641Stuexenvoid GraphBuilder::fill_sync_handler(Value lock, BlockBegin* sync_handler, bool default_handler) { 3254275567Stuexen BlockBegin* orig_block = _block; 3255275567Stuexen ValueStack* orig_state = _state; 3256224641Stuexen Instruction* orig_last = _last; 3257224641Stuexen _last = _block = sync_handler; 3258224641Stuexen _state = sync_handler->state()->copy(); 3259224641Stuexen 3260224641Stuexen assert(sync_handler != NULL, "handler missing"); 3261224641Stuexen assert(!sync_handler->is_set(BlockBegin::was_visited_flag), "is visited here"); 3262224641Stuexen 3263224641Stuexen assert(lock != NULL || default_handler, "lock or handler missing"); 3264275567Stuexen 3265224641Stuexen XHandler* h = scope_data()->xhandlers()->remove_last(); 3266224641Stuexen assert(h->entry_block() == sync_handler, "corrupt list of handlers"); 3267275567Stuexen 3268224641Stuexen block()->set(BlockBegin::was_visited_flag); 3269224641Stuexen Value exception = append_with_bci(new ExceptionObject(), SynchronizationEntryBCI); 3270224641Stuexen assert(exception->is_pinned(), "must be"); 3271224641Stuexen 3272224641Stuexen int bci = SynchronizationEntryBCI; 3273224641Stuexen if (lock) { 3274224641Stuexen assert(state()->locks_size() > 0 && state()->lock_at(state()->locks_size() - 1) == lock, "lock is missing"); 3275224641Stuexen if (lock->bci() == -99) { 3276224641Stuexen lock = append_with_bci(lock, -1); 3277224641Stuexen } 3278224641Stuexen 3279224641Stuexen // exit the monitor in the context of the synchronized method 3280224641Stuexen monitorexit(lock, SynchronizationEntryBCI); 3281224641Stuexen 3282224641Stuexen // exit the context of the synchronized method 3283275567Stuexen if (!default_handler) { 3284275567Stuexen pop_scope(); 3285224641Stuexen _state = _state->copy(); 3286224641Stuexen bci = _state->scope()->caller_bci(); 3287300733Stuexen _state = _state->pop_scope()->copy(); 3288224641Stuexen } 3289224641Stuexen } 3290224641Stuexen 3291300733Stuexen // perform the throw as if at the the call site 3292224641Stuexen apush(exception); 3293224641Stuexen 3294224641Stuexen set_exception_state(state()->copy()); 3295224641Stuexen throw_op(bci); 3296224918Stuexen 3297224918Stuexen BlockEnd* end = last()->as_BlockEnd(); 3298224918Stuexen block()->set_end(end); 3299224641Stuexen end->set_state(state()); 3300224641Stuexen 3301224641Stuexen _block = orig_block; 3302224641Stuexen _state = orig_state; 3303300733Stuexen _last = orig_last; 3304224641Stuexen} 3305224641Stuexen 3306224641Stuexen 3307224641Stuexenbool GraphBuilder::try_inline_full(ciMethod* callee, bool holder_known) { 3308224641Stuexen assert(!callee->is_native(), "callee must not be native"); 3309224641Stuexen 3310224641Stuexen // first perform tests of things it's not possible to inline 3311224641Stuexen if (callee->has_exception_handlers() && 3312224641Stuexen !InlineMethodsWithExceptionHandlers) INLINE_BAILOUT("callee has exception handlers"); 3313224641Stuexen if (callee->is_synchronized() && 3314224641Stuexen !InlineSynchronizedMethods ) INLINE_BAILOUT("callee is synchronized"); 3315227755Stuexen if (!callee->holder()->is_initialized()) INLINE_BAILOUT("callee's klass not initialized yet"); 3316227755Stuexen if (!callee->has_balanced_monitors()) INLINE_BAILOUT("callee's monitors do not match"); 3317227755Stuexen 3318227755Stuexen // Proper inlining of methods with jsrs requires a little more work. 3319275567Stuexen if (callee->has_jsrs() ) INLINE_BAILOUT("jsrs not handled properly by inliner yet"); 3320227755Stuexen 3321275567Stuexen // now perform tests that are based on flag settings 3322275567Stuexen if (inline_level() > MaxInlineLevel ) INLINE_BAILOUT("too-deep inlining"); 3323275567Stuexen if (recursive_inline_level(callee) > MaxRecursiveInlineLevel) INLINE_BAILOUT("too-deep recursive inlining"); 3324275567Stuexen if (callee->code_size() > max_inline_size() ) INLINE_BAILOUT("callee is too large"); 3325275567Stuexen 3326227755Stuexen // don't inline throwable methods unless the inlining tree is rooted in a throwable class 3327227755Stuexen if (callee->name() == ciSymbol::object_initializer_name() && 3328227755Stuexen callee->holder()->is_subclass_of(ciEnv::current()->Throwable_klass())) { 3329275567Stuexen // Throwable constructor call 3330275567Stuexen IRScope* top = scope(); 3331275567Stuexen while (top->caller() != NULL) { 3332275567Stuexen top = top->caller(); 3333275567Stuexen } 3334275567Stuexen if (!top->method()->holder()->is_subclass_of(ciEnv::current()->Throwable_klass())) { 3335275567Stuexen INLINE_BAILOUT("don't inline Throwable constructors"); 3336275567Stuexen } 3337275567Stuexen } 3338275567Stuexen 3339275567Stuexen // When SSE2 is used on intel, then no special handling is needed 3340275567Stuexen // for strictfp because the enum-constant is fixed at compile time, 3341275567Stuexen // the check for UseSSE2 is needed here 3342275567Stuexen if (strict_fp_requires_explicit_rounding && UseSSE < 2 && method()->is_strict() != callee->is_strict()) { 3343275567Stuexen INLINE_BAILOUT("caller and callee have different strict fp requirements"); 3344275567Stuexen } 3345275567Stuexen 3346227755Stuexen if (compilation()->env()->num_inlined_bytecodes() > DesiredMethodLimit) { 3347275567Stuexen INLINE_BAILOUT("total inlining greater than DesiredMethodLimit"); 3348227755Stuexen } 3349227755Stuexen 3350227755Stuexen#ifndef PRODUCT 3351227755Stuexen // printing 3352227755Stuexen if (PrintInlining) { 3353227755Stuexen print_inline_result(callee, true); 3354227755Stuexen } 3355227755Stuexen#endif 3356227755Stuexen 3357227755Stuexen // NOTE: Bailouts from this point on, which occur at the 3358275567Stuexen // GraphBuilder level, do not cause bailout just of the inlining but 3359227755Stuexen // in fact of the entire compilation. 3360227755Stuexen 3361227755Stuexen BlockBegin* orig_block = block(); 3362227755Stuexen 3363275567Stuexen const int args_base = state()->stack_size() - callee->arg_size(); 3364227755Stuexen assert(args_base >= 0, "stack underflow during inlining"); 3365275567Stuexen 3366227755Stuexen // Insert null check if necessary 3367227755Stuexen Value recv = NULL; 3368275567Stuexen if (code() != Bytecodes::_invokestatic) { 3369275567Stuexen // note: null check must happen even if first instruction of callee does 3370227755Stuexen // an implicit null check since the callee is in a different scope 3371227755Stuexen // and we must make sure exception handling does the right thing 3372227755Stuexen assert(!callee->is_static(), "callee must not be static"); 3373227755Stuexen assert(callee->arg_size() > 0, "must have at least a receiver"); 3374227755Stuexen recv = state()->stack_at(args_base); 3375227755Stuexen null_check(recv); 3376227755Stuexen } 3377227755Stuexen 3378275567Stuexen if (profile_inlined_calls()) { 3379227755Stuexen profile_call(recv, holder_known ? callee->holder() : NULL); 3380227755Stuexen } 3381275567Stuexen 3382227755Stuexen profile_invocation(callee); 3383227755Stuexen 3384227755Stuexen // Introduce a new callee continuation point - if the callee has 3385227755Stuexen // more than one return instruction or the return does not allow 3386227755Stuexen // fall-through of control flow, all return instructions of the 3387227755Stuexen // callee will need to be replaced by Goto's pointing to this 3388227755Stuexen // continuation point. 3389227755Stuexen BlockBegin* cont = block_at(next_bci()); 3390227755Stuexen bool continuation_existed = true; 3391227755Stuexen if (cont == NULL) { 3392227755Stuexen cont = new BlockBegin(next_bci()); 3393227755Stuexen // low number so that continuation gets parsed as early as possible 3394227755Stuexen cont->set_depth_first_number(0); 3395227755Stuexen#ifndef PRODUCT 3396227755Stuexen if (PrintInitialBlockList) { 3397275567Stuexen tty->print_cr("CFG: created block %d (bci %d) as continuation for inline at bci %d", 3398227755Stuexen cont->block_id(), cont->bci(), bci()); 3399227755Stuexen } 3400227755Stuexen#endif 3401227755Stuexen continuation_existed = false; 3402227755Stuexen } 3403227755Stuexen // Record number of predecessors of continuation block before 3404227755Stuexen // inlining, to detect if inlined method has edges to its 3405227755Stuexen // continuation after inlining. 3406227755Stuexen int continuation_preds = cont->number_of_preds(); 3407227755Stuexen 3408227755Stuexen // Push callee scope 3409227755Stuexen push_scope(callee, cont); 3410227755Stuexen 3411227755Stuexen // the BlockListBuilder for the callee could have bailed out 3412227755Stuexen CHECK_BAILOUT_(false); 3413227755Stuexen 3414227755Stuexen // Temporarily set up bytecode stream so we can append instructions 3415227755Stuexen // (only using the bci of this stream) 3416227755Stuexen scope_data()->set_stream(scope_data()->parent()->stream()); 3417257274Stuexen 3418227755Stuexen // Pass parameters into callee state: add assignments 3419227755Stuexen // note: this will also ensure that all arguments are computed before being passed 3420227755Stuexen ValueStack* callee_state = state(); 3421269436Stuexen ValueStack* caller_state = scope()->caller_state(); 3422269436Stuexen { int i = args_base; 3423269436Stuexen while (i < caller_state->stack_size()) { 3424269436Stuexen const int par_no = i - args_base; 3425269436Stuexen Value arg = caller_state->stack_at_inc(i); 3426269436Stuexen // NOTE: take base() of arg->type() to avoid problems storing 3427269436Stuexen // constants 3428269436Stuexen store_local(callee_state, arg, arg->type()->base(), par_no); 3429269436Stuexen } 3430269436Stuexen } 3431269436Stuexen 3432269436Stuexen // Remove args from stack. 3433269436Stuexen // Note that we preserve locals state in case we can use it later 3434269436Stuexen // (see use of pop_scope() below) 3435269436Stuexen caller_state->truncate_stack(args_base); 3436269436Stuexen callee_state->truncate_stack(args_base); 3437269436Stuexen 3438269436Stuexen // Setup state that is used at returns form the inlined method. 3439269436Stuexen // This is essentially the state of the continuation block, 3440269436Stuexen // but without the return value on stack, if any, this will 3441269436Stuexen // be pushed at the return instruction (see method_return). 3442269436Stuexen scope_data()->set_continuation_state(caller_state->copy()); 3443269436Stuexen 3444269436Stuexen // Compute lock stack size for callee scope now that args have been passed 3445269436Stuexen scope()->compute_lock_stack_size(); 3446269436Stuexen 3447269436Stuexen Value lock; 3448269448Stuexen BlockBegin* sync_handler; 3449269448Stuexen 3450269448Stuexen // Inline the locking of the receiver if the callee is synchronized 3451269448Stuexen if (callee->is_synchronized()) { 3452269448Stuexen lock = callee->is_static() ? append(new Constant(new InstanceConstant(callee->holder()->java_mirror()))) 3453269448Stuexen : state()->local_at(0); 3454269448Stuexen sync_handler = new BlockBegin(-1); 3455269448Stuexen inline_sync_entry(lock, sync_handler); 3456269448Stuexen 3457269448Stuexen // recompute the lock stack size 3458269448Stuexen scope()->compute_lock_stack_size(); 3459269448Stuexen } 3460269448Stuexen 3461269448Stuexen 3462269448Stuexen BlockBegin* callee_start_block = block_at(0); 3463269448Stuexen if (callee_start_block != NULL) { 3464269448Stuexen assert(callee_start_block->is_set(BlockBegin::parser_loop_header_flag), "must be loop header"); 3465269448Stuexen Goto* goto_callee = new Goto(callee_start_block, false); 3466269448Stuexen goto_callee->set_state(state()); 3467269448Stuexen // The state for this goto is in the scope of the callee, so use 3468269448Stuexen // the entry bci for the callee instead of the call site bci. 3469269448Stuexen append_with_bci(goto_callee, 0); 3470269448Stuexen _block->set_end(goto_callee); 3471269448Stuexen callee_start_block->merge(callee_state); 3472269448Stuexen 3473269448Stuexen _last = _block = callee_start_block; 3474269448Stuexen 3475269858Stuexen scope_data()->add_to_work_list(callee_start_block); 3476269858Stuexen } 3477269858Stuexen 3478269858Stuexen // Clear out bytecode stream 3479269858Stuexen scope_data()->set_stream(NULL); 3480269858Stuexen 3481269858Stuexen // Ready to resume parsing in callee (either in the same block we 3482269858Stuexen // were in before or in the callee's start block) 3483269858Stuexen iterate_all_blocks(callee_start_block == NULL); 3484269858Stuexen 3485269858Stuexen // If we bailed out during parsing, return immediately (this is bad news) 3486269858Stuexen if (bailed_out()) return false; 3487269858Stuexen 3488269858Stuexen // iterate_all_blocks theoretically traverses in random order; in 3489269858Stuexen // practice, we have only traversed the continuation if we are 3490269858Stuexen // inlining into a subroutine 3491269858Stuexen assert(continuation_existed || 3492269858Stuexen !continuation()->is_set(BlockBegin::was_visited_flag), 3493269858Stuexen "continuation should not have been parsed yet if we created it"); 3494269858Stuexen 3495269858Stuexen // If we bailed out during parsing, return immediately (this is bad news) 3496269858Stuexen CHECK_BAILOUT_(false); 3497269858Stuexen 3498269858Stuexen // At this point we are almost ready to return and resume parsing of 3499269858Stuexen // the caller back in the GraphBuilder. The only thing we want to do 3500269858Stuexen // first is an optimization: during parsing of the callee we 3501269858Stuexen // generated at least one Goto to the continuation block. If we 3502269858Stuexen // generated exactly one, and if the inlined method spanned exactly 3503269858Stuexen // one block (and we didn't have to Goto its entry), then we snip 3504269858Stuexen // off the Goto to the continuation, allowing control to fall 3505269858Stuexen // through back into the caller block and effectively performing 3506269858Stuexen // block merging. This allows load elimination and CSE to take place 3507269858Stuexen // across multiple callee scopes if they are relatively simple, and 3508269858Stuexen // is currently essential to making inlining profitable. 3509269858Stuexen if ( num_returns() == 1 3510269858Stuexen && block() == orig_block 3511269858Stuexen && block() == inline_cleanup_block()) { 3512269858Stuexen _last = inline_cleanup_return_prev(); 3513269858Stuexen _state = inline_cleanup_state()->pop_scope(); 3514269858Stuexen } else if (continuation_preds == cont->number_of_preds()) { 3515269858Stuexen // Inlining caused that the instructions after the invoke in the 3516269858Stuexen // caller are not reachable any more. So skip filling this block 3517269858Stuexen // with instructions! 3518269858Stuexen assert (cont == continuation(), ""); 3519269858Stuexen assert(_last && _last->as_BlockEnd(), ""); 3520269858Stuexen _skip_block = true; 3521269858Stuexen } else { 3522269858Stuexen // Resume parsing in continuation block unless it was already parsed. 3523269858Stuexen // Note that if we don't change _last here, iteration in 3524269858Stuexen // iterate_bytecodes_for_block will stop when we return. 3525269858Stuexen if (!continuation()->is_set(BlockBegin::was_visited_flag)) { 3526269858Stuexen // add continuation to work list instead of parsing it immediately 3527269858Stuexen assert(_last && _last->as_BlockEnd(), ""); 3528269858Stuexen scope_data()->parent()->add_to_work_list(continuation()); 3529269527Stuexen _skip_block = true; 3530269527Stuexen } 3531269527Stuexen } 3532269527Stuexen 3533269527Stuexen // Fill the exception handler for synchronized methods with instructions 3534269527Stuexen if (callee->is_synchronized() && sync_handler->state() != NULL) { 3535269527Stuexen fill_sync_handler(lock, sync_handler); 3536269527Stuexen } else { 3537269527Stuexen pop_scope(); 3538269527Stuexen } 3539269527Stuexen 3540269527Stuexen compilation()->notice_inlined_method(callee); 3541269527Stuexen 3542269527Stuexen return true; 3543269527Stuexen} 3544269527Stuexen 3545269527Stuexen 3546269527Stuexenvoid GraphBuilder::inline_bailout(const char* msg) { 3547269527Stuexen assert(msg != NULL, "inline bailout msg must exist"); 3548269527Stuexen _inline_bailout_msg = msg; 3549269527Stuexen} 3550269527Stuexen 3551269527Stuexen 3552269527Stuexenvoid GraphBuilder::clear_inline_bailout() { 3553269527Stuexen _inline_bailout_msg = NULL; 3554269527Stuexen} 3555269527Stuexen 3556269475Stuexen 3557269475Stuexenvoid GraphBuilder::push_root_scope(IRScope* scope, BlockList* bci2block, BlockBegin* start) { 3558269475Stuexen ScopeData* data = new ScopeData(NULL); 3559269475Stuexen data->set_scope(scope); 3560269475Stuexen data->set_bci2block(bci2block); 3561269475Stuexen _scope_data = data; 3562269475Stuexen _block = start; 3563269475Stuexen} 3564269475Stuexen 3565269475Stuexen 3566269475Stuexenvoid GraphBuilder::push_scope(ciMethod* callee, BlockBegin* continuation) { 3567269475Stuexen IRScope* callee_scope = new IRScope(compilation(), scope(), bci(), callee, -1, false); 3568269475Stuexen scope()->add_callee(callee_scope); 3569269475Stuexen 3570269475Stuexen BlockListBuilder blb(compilation(), callee_scope, -1); 3571269475Stuexen CHECK_BAILOUT(); 3572269475Stuexen 3573269475Stuexen if (!blb.bci2block()->at(0)->is_set(BlockBegin::parser_loop_header_flag)) { 3574269475Stuexen // this scope can be inlined directly into the caller so remove 3575269475Stuexen // the block at bci 0. 3576269475Stuexen blb.bci2block()->at_put(0, NULL); 3577269475Stuexen } 3578269475Stuexen 3579269475Stuexen callee_scope->set_caller_state(state()); 3580269475Stuexen set_state(state()->push_scope(callee_scope)); 3581269475Stuexen 3582269475Stuexen ScopeData* data = new ScopeData(scope_data()); 3583269481Stuexen data->set_scope(callee_scope); 3584269481Stuexen data->set_bci2block(blb.bci2block()); 3585269481Stuexen data->set_continuation(continuation); 3586269481Stuexen _scope_data = data; 3587269481Stuexen} 3588269481Stuexen 3589269481Stuexen 3590269481Stuexenvoid GraphBuilder::push_scope_for_jsr(BlockBegin* jsr_continuation, int jsr_dest_bci) { 3591269481Stuexen ScopeData* data = new ScopeData(scope_data()); 3592269481Stuexen data->set_parsing_jsr(); 3593269481Stuexen data->set_jsr_entry_bci(jsr_dest_bci); 3594269481Stuexen data->set_jsr_return_address_local(-1); 3595269481Stuexen // Must clone bci2block list as we will be mutating it in order to 3596269481Stuexen // properly clone all blocks in jsr region as well as exception 3597269481Stuexen // handlers containing rets 3598269481Stuexen BlockList* new_bci2block = new BlockList(bci2block()->length()); 3599269481Stuexen new_bci2block->push_all(bci2block()); 3600269481Stuexen data->set_bci2block(new_bci2block); 3601269481Stuexen data->set_scope(scope()); 3602269481Stuexen data->setup_jsr_xhandlers(); 3603269481Stuexen data->set_continuation(continuation()); 3604269481Stuexen if (continuation() != NULL) { 3605269481Stuexen assert(continuation_state() != NULL, ""); 3606269481Stuexen data->set_continuation_state(continuation_state()->copy()); 3607269481Stuexen } 3608269481Stuexen data->set_jsr_continuation(jsr_continuation); 3609269481Stuexen _scope_data = data; 3610235021Stuexen} 3611235021Stuexen 3612235021Stuexen 3613235021Stuexenvoid GraphBuilder::pop_scope() { 3614235021Stuexen int number_of_locks = scope()->number_of_locks(); 3615235021Stuexen _scope_data = scope_data()->parent(); 3616235021Stuexen // accumulate minimum number of monitor slots to be reserved 3617235021Stuexen scope()->set_min_number_of_locks(number_of_locks); 3618235021Stuexen} 3619235021Stuexen 3620235021Stuexen 3621235021Stuexenvoid GraphBuilder::pop_scope_for_jsr() { 3622235021Stuexen _scope_data = scope_data()->parent(); 3623235021Stuexen} 3624235021Stuexen 3625235021Stuexenbool GraphBuilder::append_unsafe_get_obj(ciMethod* callee, BasicType t, bool is_volatile) { 3626235021Stuexen if (InlineUnsafeOps) { 3627235021Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3628235021Stuexen null_check(args->at(0)); 3629235021Stuexen Instruction* offset = args->at(2); 3630235021Stuexen#ifndef _LP64 3631235021Stuexen offset = append(new Convert(Bytecodes::_l2i, offset, as_ValueType(T_INT))); 3632235021Stuexen#endif 3633235021Stuexen Instruction* op = append(new UnsafeGetObject(t, args->at(1), offset, is_volatile)); 3634235021Stuexen push(op->type(), op); 3635235021Stuexen compilation()->set_has_unsafe_access(true); 3636235021Stuexen } 3637269945Stuexen return InlineUnsafeOps; 3638269945Stuexen} 3639269945Stuexen 3640269945Stuexen 3641269945Stuexenbool GraphBuilder::append_unsafe_put_obj(ciMethod* callee, BasicType t, bool is_volatile) { 3642269945Stuexen if (InlineUnsafeOps) { 3643269945Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3644269945Stuexen null_check(args->at(0)); 3645269945Stuexen Instruction* offset = args->at(2); 3646269945Stuexen#ifndef _LP64 3647269945Stuexen offset = append(new Convert(Bytecodes::_l2i, offset, as_ValueType(T_INT))); 3648269945Stuexen#endif 3649269945Stuexen Instruction* op = append(new UnsafePutObject(t, args->at(1), offset, args->at(3), is_volatile)); 3650275967Stuexen compilation()->set_has_unsafe_access(true); 3651269945Stuexen kill_all(); 3652275967Stuexen } 3653275967Stuexen return InlineUnsafeOps; 3654269945Stuexen} 3655269945Stuexen 3656269945Stuexen 3657269945Stuexenbool GraphBuilder::append_unsafe_get_raw(ciMethod* callee, BasicType t) { 3658269945Stuexen if (InlineUnsafeOps) { 3659269945Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3660269945Stuexen null_check(args->at(0)); 3661275954Stuexen Instruction* op = append(new UnsafeGetRaw(t, args->at(1), false)); 3662275954Stuexen push(op->type(), op); 3663275967Stuexen compilation()->set_has_unsafe_access(true); 3664275967Stuexen } 3665275954Stuexen return InlineUnsafeOps; 3666275954Stuexen} 3667275954Stuexen 3668269945Stuexen 3669269945Stuexenbool GraphBuilder::append_unsafe_put_raw(ciMethod* callee, BasicType t) { 3670269945Stuexen if (InlineUnsafeOps) { 3671269945Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3672269945Stuexen null_check(args->at(0)); 3673269945Stuexen Instruction* op = append(new UnsafePutRaw(t, args->at(1), args->at(2))); 3674269945Stuexen compilation()->set_has_unsafe_access(true); 3675269945Stuexen } 3676269945Stuexen return InlineUnsafeOps; 3677269945Stuexen} 3678269945Stuexen 3679269945Stuexen 3680269945Stuexenbool GraphBuilder::append_unsafe_prefetch(ciMethod* callee, bool is_static, bool is_store) { 3681269945Stuexen if (InlineUnsafeOps) { 3682269945Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3683269945Stuexen int obj_arg_index = 1; // Assume non-static case 3684269945Stuexen if (is_static) { 3685269945Stuexen obj_arg_index = 0; 3686269945Stuexen } else { 3687275967Stuexen null_check(args->at(0)); 3688275967Stuexen } 3689269945Stuexen Instruction* offset = args->at(obj_arg_index + 1); 3690269945Stuexen#ifndef _LP64 3691269945Stuexen offset = append(new Convert(Bytecodes::_l2i, offset, as_ValueType(T_INT))); 3692269945Stuexen#endif 3693269945Stuexen Instruction* op = is_store ? append(new UnsafePrefetchWrite(args->at(obj_arg_index), offset)) 3694269945Stuexen : append(new UnsafePrefetchRead (args->at(obj_arg_index), offset)); 3695269945Stuexen compilation()->set_has_unsafe_access(true); 3696269945Stuexen } 3697269945Stuexen return InlineUnsafeOps; 3698269945Stuexen} 3699269945Stuexen 3700269945Stuexen 3701269945Stuexenvoid GraphBuilder::append_unsafe_CAS(ciMethod* callee) { 3702269945Stuexen ValueType* result_type = as_ValueType(callee->return_type()); 3703269945Stuexen assert(result_type->is_int(), "int result"); 3704279859Stuexen Values* args = state()->pop_arguments(callee->arg_size()); 3705279859Stuexen 3706279859Stuexen // Pop off some args to speically handle, then push back 3707279859Stuexen Value newval = args->pop(); 3708279859Stuexen Value cmpval = args->pop(); 3709279859Stuexen Value offset = args->pop(); 3710279859Stuexen Value src = args->pop(); 3711279859Stuexen Value unsafe_obj = args->pop(); 3712279859Stuexen 3713279859Stuexen // Separately handle the unsafe arg. It is not needed for code 3714279859Stuexen // generation, but must be null checked 3715279859Stuexen null_check(unsafe_obj); 3716279859Stuexen 3717279859Stuexen#ifndef _LP64 3718279859Stuexen offset = append(new Convert(Bytecodes::_l2i, offset, as_ValueType(T_INT))); 3719279859Stuexen#endif 3720279859Stuexen 3721279859Stuexen args->push(src); 3722279859Stuexen args->push(offset); 3723279859Stuexen args->push(cmpval); 3724279859Stuexen args->push(newval); 3725279859Stuexen 3726279859Stuexen // An unsafe CAS can alias with other field accesses, but we don't 3727279859Stuexen // know which ones so mark the state as no preserved. This will 3728279859Stuexen // cause CSE to invalidate memory across it. 3729279859Stuexen bool preserves_state = false; 3730279859Stuexen Intrinsic* result = new Intrinsic(result_type, callee->intrinsic_id(), args, false, lock_stack(), preserves_state); 3731163953Srrs append_split(result); 3732171943Srrs push(result_type, result); 3733163953Srrs compilation()->set_has_unsafe_access(true); 3734163953Srrs} 3735163953Srrs 3736223132Stuexen 3737223132Stuexen#ifndef PRODUCT 3738223132Stuexenvoid GraphBuilder::print_inline_result(ciMethod* callee, bool res) { 3739163953Srrs const char sync_char = callee->is_synchronized() ? 's' : ' '; 3740163953Srrs const char exception_char = callee->has_exception_handlers() ? '!' : ' '; 3741163953Srrs const char monitors_char = callee->has_monitor_bytecodes() ? 'm' : ' '; 3742163953Srrs tty->print(" %c%c%c ", sync_char, exception_char, monitors_char); 3743166675Srrs for (int i = 0; i < scope()->level(); i++) tty->print(" "); 3744166675Srrs if (res) { 3745163953Srrs tty->print(" "); 3746166675Srrs } else { 3747166675Srrs tty->print("- "); 3748163953Srrs } 3749171943Srrs tty->print("@ %d ", bci()); 3750167598Srrs callee->print_short_name(); 3751163953Srrs tty->print(" (%d bytes)", callee->code_size()); 3752166675Srrs if (_inline_bailout_msg) { 3753169420Srrs tty->print(" %s", _inline_bailout_msg); 3754171943Srrs } 3755163953Srrs tty->cr(); 3756163953Srrs 3757163953Srrs if (res && CIPrintMethodCodes) { 3758233005Stuexen callee->print_codes(); 3759169420Srrs } 3760171943Srrs} 3761228907Stuexen 3762167598Srrs 3763168299Srrsvoid GraphBuilder::print_stats() { 3764163953Srrs vmap()->print(); 3765163953Srrs} 3766166675Srrs#endif // PRODUCT 3767163953Srrs 3768163953Srrs 3769163953Srrsvoid GraphBuilder::profile_call(Value recv, ciKlass* known_holder) { 3770163953Srrs append(new ProfileCall(method(), bci(), recv, known_holder)); 3771163953Srrs} 3772163953Srrs 3773163953Srrs 3774163953Srrsvoid GraphBuilder::profile_invocation(ciMethod* callee) { 3775166675Srrs if (profile_calls()) { 3776163953Srrs // increment the interpreter_invocation_count for the inlinee 3777163953Srrs Value m = append(new Constant(new ObjectConstant(callee))); 3778163953Srrs append(new ProfileCounter(m, methodOopDesc::interpreter_invocation_counter_offset_in_bytes(), 1)); 3779166675Srrs } 3780163953Srrs} 3781163953Srrs 3782163953Srrs 3783163953Srrsvoid GraphBuilder::profile_bci(int bci) { 3784171943Srrs if (profile_branches()) { 3785171943Srrs ciMethodData* md = method()->method_data(); 3786171943Srrs if (md == NULL) { 3787171943Srrs BAILOUT("out of memory building methodDataOop"); 3788171943Srrs } 3789224641Stuexen ciProfileData* data = md->bci_to_data(bci); 3790224641Stuexen assert(data != NULL && data->is_JumpData(), "need JumpData for goto"); 3791224641Stuexen Value mdo = append(new Constant(new ObjectConstant(md))); 3792224641Stuexen append(new ProfileCounter(mdo, md->byte_offset_of_slot(data, JumpData::taken_offset()), 1)); 3793224641Stuexen } 3794224641Stuexen} 3795171943Srrs