| File: | jdk/src/hotspot/share/opto/parse1.cpp |
| Warning: | line 178, column 13 Value stored to 'bt_l' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "compiler/compileLog.hpp" |
| 27 | #include "interpreter/linkResolver.hpp" |
| 28 | #include "memory/resourceArea.hpp" |
| 29 | #include "oops/method.hpp" |
| 30 | #include "opto/addnode.hpp" |
| 31 | #include "opto/c2compiler.hpp" |
| 32 | #include "opto/castnode.hpp" |
| 33 | #include "opto/idealGraphPrinter.hpp" |
| 34 | #include "opto/locknode.hpp" |
| 35 | #include "opto/memnode.hpp" |
| 36 | #include "opto/opaquenode.hpp" |
| 37 | #include "opto/parse.hpp" |
| 38 | #include "opto/rootnode.hpp" |
| 39 | #include "opto/runtime.hpp" |
| 40 | #include "opto/type.hpp" |
| 41 | #include "runtime/handles.inline.hpp" |
| 42 | #include "runtime/safepointMechanism.hpp" |
| 43 | #include "runtime/sharedRuntime.hpp" |
| 44 | #include "utilities/bitMap.inline.hpp" |
| 45 | #include "utilities/copy.hpp" |
| 46 | |
| 47 | // Static array so we can figure out which bytecodes stop us from compiling |
| 48 | // the most. Some of the non-static variables are needed in bytecodeInfo.cpp |
| 49 | // and eventually should be encapsulated in a proper class (gri 8/18/98). |
| 50 | |
| 51 | #ifndef PRODUCT |
| 52 | int nodes_created = 0; |
| 53 | int methods_parsed = 0; |
| 54 | int methods_seen = 0; |
| 55 | int blocks_parsed = 0; |
| 56 | int blocks_seen = 0; |
| 57 | |
| 58 | int explicit_null_checks_inserted = 0; |
| 59 | int explicit_null_checks_elided = 0; |
| 60 | int all_null_checks_found = 0; |
| 61 | int implicit_null_checks = 0; |
| 62 | |
| 63 | bool Parse::BytecodeParseHistogram::_initialized = false; |
| 64 | uint Parse::BytecodeParseHistogram::_bytecodes_parsed [Bytecodes::number_of_codes]; |
| 65 | uint Parse::BytecodeParseHistogram::_nodes_constructed[Bytecodes::number_of_codes]; |
| 66 | uint Parse::BytecodeParseHistogram::_nodes_transformed[Bytecodes::number_of_codes]; |
| 67 | uint Parse::BytecodeParseHistogram::_new_values [Bytecodes::number_of_codes]; |
| 68 | |
| 69 | //------------------------------print_statistics------------------------------- |
| 70 | void Parse::print_statistics() { |
| 71 | tty->print_cr("--- Compiler Statistics ---"); |
| 72 | tty->print("Methods seen: %d Methods parsed: %d", methods_seen, methods_parsed); |
| 73 | tty->print(" Nodes created: %d", nodes_created); |
| 74 | tty->cr(); |
| 75 | if (methods_seen != methods_parsed) { |
| 76 | tty->print_cr("Reasons for parse failures (NOT cumulative):"); |
| 77 | } |
| 78 | tty->print_cr("Blocks parsed: %d Blocks seen: %d", blocks_parsed, blocks_seen); |
| 79 | |
| 80 | if (explicit_null_checks_inserted) { |
| 81 | tty->print_cr("%d original NULL checks - %d elided (%2d%%); optimizer leaves %d,", |
| 82 | explicit_null_checks_inserted, explicit_null_checks_elided, |
| 83 | (100*explicit_null_checks_elided)/explicit_null_checks_inserted, |
| 84 | all_null_checks_found); |
| 85 | } |
| 86 | if (all_null_checks_found) { |
| 87 | tty->print_cr("%d made implicit (%2d%%)", implicit_null_checks, |
| 88 | (100*implicit_null_checks)/all_null_checks_found); |
| 89 | } |
| 90 | if (SharedRuntime::_implicit_null_throws) { |
| 91 | tty->print_cr("%d implicit null exceptions at runtime", |
| 92 | SharedRuntime::_implicit_null_throws); |
| 93 | } |
| 94 | |
| 95 | if (PrintParseStatistics && BytecodeParseHistogram::initialized()) { |
| 96 | BytecodeParseHistogram::print(); |
| 97 | } |
| 98 | } |
| 99 | #endif |
| 100 | |
| 101 | //------------------------------ON STACK REPLACEMENT--------------------------- |
| 102 | |
| 103 | // Construct a node which can be used to get incoming state for |
| 104 | // on stack replacement. |
| 105 | Node *Parse::fetch_interpreter_state(int index, |
| 106 | BasicType bt, |
| 107 | Node *local_addrs, |
| 108 | Node *local_addrs_base) { |
| 109 | Node *mem = memory(Compile::AliasIdxRaw); |
| 110 | Node *adr = basic_plus_adr( local_addrs_base, local_addrs, -index*wordSize ); |
| 111 | Node *ctl = control(); |
| 112 | |
| 113 | // Very similar to LoadNode::make, except we handle un-aligned longs and |
| 114 | // doubles on Sparc. Intel can handle them just fine directly. |
| 115 | Node *l = NULL__null; |
| 116 | switch (bt) { // Signature is flattened |
| 117 | case T_INT: l = new LoadINode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeInt::INT, MemNode::unordered); break; |
| 118 | case T_FLOAT: l = new LoadFNode(ctl, mem, adr, TypeRawPtr::BOTTOM, Type::FLOAT, MemNode::unordered); break; |
| 119 | case T_ADDRESS: l = new LoadPNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM, MemNode::unordered); break; |
| 120 | case T_OBJECT: l = new LoadPNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeInstPtr::BOTTOM, MemNode::unordered); break; |
| 121 | case T_LONG: |
| 122 | case T_DOUBLE: { |
| 123 | // Since arguments are in reverse order, the argument address 'adr' |
| 124 | // refers to the back half of the long/double. Recompute adr. |
| 125 | adr = basic_plus_adr(local_addrs_base, local_addrs, -(index+1)*wordSize); |
| 126 | if (Matcher::misaligned_doubles_ok) { |
| 127 | l = (bt == T_DOUBLE) |
| 128 | ? (Node*)new LoadDNode(ctl, mem, adr, TypeRawPtr::BOTTOM, Type::DOUBLE, MemNode::unordered) |
| 129 | : (Node*)new LoadLNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeLong::LONG, MemNode::unordered); |
| 130 | } else { |
| 131 | l = (bt == T_DOUBLE) |
| 132 | ? (Node*)new LoadD_unalignedNode(ctl, mem, adr, TypeRawPtr::BOTTOM, MemNode::unordered) |
| 133 | : (Node*)new LoadL_unalignedNode(ctl, mem, adr, TypeRawPtr::BOTTOM, MemNode::unordered); |
| 134 | } |
| 135 | break; |
| 136 | } |
| 137 | default: ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 137); ::breakpoint(); } while (0); |
| 138 | } |
| 139 | return _gvn.transform(l); |
| 140 | } |
| 141 | |
| 142 | // Helper routine to prevent the interpreter from handing |
| 143 | // unexpected typestate to an OSR method. |
| 144 | // The Node l is a value newly dug out of the interpreter frame. |
| 145 | // The type is the type predicted by ciTypeFlow. Note that it is |
| 146 | // not a general type, but can only come from Type::get_typeflow_type. |
| 147 | // The safepoint is a map which will feed an uncommon trap. |
| 148 | Node* Parse::check_interpreter_type(Node* l, const Type* type, |
| 149 | SafePointNode* &bad_type_exit) { |
| 150 | |
| 151 | const TypeOopPtr* tp = type->isa_oopptr(); |
| 152 | |
| 153 | // TypeFlow may assert null-ness if a type appears unloaded. |
| 154 | if (type == TypePtr::NULL_PTR || |
| 155 | (tp != NULL__null && !tp->klass()->is_loaded())) { |
| 156 | // Value must be null, not a real oop. |
| 157 | Node* chk = _gvn.transform( new CmpPNode(l, null()) ); |
| 158 | Node* tst = _gvn.transform( new BoolNode(chk, BoolTest::eq) ); |
| 159 | IfNode* iff = create_and_map_if(control(), tst, PROB_MAX(1.0f-(1e-6f)), COUNT_UNKNOWN(-1.0f)); |
| 160 | set_control(_gvn.transform( new IfTrueNode(iff) )); |
| 161 | Node* bad_type = _gvn.transform( new IfFalseNode(iff) ); |
| 162 | bad_type_exit->control()->add_req(bad_type); |
| 163 | l = null(); |
| 164 | } |
| 165 | |
| 166 | // Typeflow can also cut off paths from the CFG, based on |
| 167 | // types which appear unloaded, or call sites which appear unlinked. |
| 168 | // When paths are cut off, values at later merge points can rise |
| 169 | // toward more specific classes. Make sure these specific classes |
| 170 | // are still in effect. |
| 171 | if (tp != NULL__null && tp->klass() != C->env()->Object_klass()) { |
| 172 | // TypeFlow asserted a specific object type. Value must have that type. |
| 173 | Node* bad_type_ctrl = NULL__null; |
| 174 | l = gen_checkcast(l, makecon(TypeKlassPtr::make(tp->klass())), &bad_type_ctrl); |
| 175 | bad_type_exit->control()->add_req(bad_type_ctrl); |
| 176 | } |
| 177 | |
| 178 | BasicType bt_l = _gvn.type(l)->basic_type(); |
Value stored to 'bt_l' during its initialization is never read | |
| 179 | BasicType bt_t = type->basic_type(); |
| 180 | assert(_gvn.type(l)->higher_equal(type), "must constrain OSR typestate")do { if (!(_gvn.type(l)->higher_equal(type))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 180, "assert(" "_gvn.type(l)->higher_equal(type)" ") failed" , "must constrain OSR typestate"); ::breakpoint(); } } while ( 0); |
| 181 | return l; |
| 182 | } |
| 183 | |
| 184 | // Helper routine which sets up elements of the initial parser map when |
| 185 | // performing a parse for on stack replacement. Add values into map. |
| 186 | // The only parameter contains the address of a interpreter arguments. |
| 187 | void Parse::load_interpreter_state(Node* osr_buf) { |
| 188 | int index; |
| 189 | int max_locals = jvms()->loc_size(); |
| 190 | int max_stack = jvms()->stk_size(); |
| 191 | |
| 192 | |
| 193 | // Mismatch between method and jvms can occur since map briefly held |
| 194 | // an OSR entry state (which takes up one RawPtr word). |
| 195 | assert(max_locals == method()->max_locals(), "sanity")do { if (!(max_locals == method()->max_locals())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 195, "assert(" "max_locals == method()->max_locals()" ") failed" , "sanity"); ::breakpoint(); } } while (0); |
| 196 | assert(max_stack >= method()->max_stack(), "sanity")do { if (!(max_stack >= method()->max_stack())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 196, "assert(" "max_stack >= method()->max_stack()" ") failed" , "sanity"); ::breakpoint(); } } while (0); |
| 197 | assert((int)jvms()->endoff() == TypeFunc::Parms + max_locals + max_stack, "sanity")do { if (!((int)jvms()->endoff() == TypeFunc::Parms + max_locals + max_stack)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 197, "assert(" "(int)jvms()->endoff() == TypeFunc::Parms + max_locals + max_stack" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 198 | assert((int)jvms()->endoff() == (int)map()->req(), "sanity")do { if (!((int)jvms()->endoff() == (int)map()->req())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 198, "assert(" "(int)jvms()->endoff() == (int)map()->req()" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 199 | |
| 200 | // Find the start block. |
| 201 | Block* osr_block = start_block(); |
| 202 | assert(osr_block->start() == osr_bci(), "sanity")do { if (!(osr_block->start() == osr_bci())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 202, "assert(" "osr_block->start() == osr_bci()" ") failed" , "sanity"); ::breakpoint(); } } while (0); |
| 203 | |
| 204 | // Set initial BCI. |
| 205 | set_parse_bci(osr_block->start()); |
| 206 | |
| 207 | // Set initial stack depth. |
| 208 | set_sp(osr_block->start_sp()); |
| 209 | |
| 210 | // Check bailouts. We currently do not perform on stack replacement |
| 211 | // of loops in catch blocks or loops which branch with a non-empty stack. |
| 212 | if (sp() != 0) { |
| 213 | C->record_method_not_compilable("OSR starts with non-empty stack"); |
| 214 | return; |
| 215 | } |
| 216 | // Do not OSR inside finally clauses: |
| 217 | if (osr_block->has_trap_at(osr_block->start())) { |
| 218 | C->record_method_not_compilable("OSR starts with an immediate trap"); |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | // Commute monitors from interpreter frame to compiler frame. |
| 223 | assert(jvms()->monitor_depth() == 0, "should be no active locks at beginning of osr")do { if (!(jvms()->monitor_depth() == 0)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 223, "assert(" "jvms()->monitor_depth() == 0" ") failed" , "should be no active locks at beginning of osr"); ::breakpoint (); } } while (0); |
| 224 | int mcnt = osr_block->flow()->monitor_count(); |
| 225 | Node *monitors_addr = basic_plus_adr(osr_buf, osr_buf, (max_locals+mcnt*2-1)*wordSize); |
| 226 | for (index = 0; index < mcnt; index++) { |
| 227 | // Make a BoxLockNode for the monitor. |
| 228 | Node *box = _gvn.transform(new BoxLockNode(next_monitor())); |
| 229 | |
| 230 | |
| 231 | // Displaced headers and locked objects are interleaved in the |
| 232 | // temp OSR buffer. We only copy the locked objects out here. |
| 233 | // Fetch the locked object from the OSR temp buffer and copy to our fastlock node. |
| 234 | Node *lock_object = fetch_interpreter_state(index*2, T_OBJECT, monitors_addr, osr_buf); |
| 235 | // Try and copy the displaced header to the BoxNode |
| 236 | Node *displaced_hdr = fetch_interpreter_state((index*2) + 1, T_ADDRESS, monitors_addr, osr_buf); |
| 237 | |
| 238 | |
| 239 | store_to_memory(control(), box, displaced_hdr, T_ADDRESS, Compile::AliasIdxRaw, MemNode::unordered); |
| 240 | |
| 241 | // Build a bogus FastLockNode (no code will be generated) and push the |
| 242 | // monitor into our debug info. |
| 243 | const FastLockNode *flock = _gvn.transform(new FastLockNode( 0, lock_object, box ))->as_FastLock(); |
| 244 | map()->push_monitor(flock); |
| 245 | |
| 246 | // If the lock is our method synchronization lock, tuck it away in |
| 247 | // _sync_lock for return and rethrow exit paths. |
| 248 | if (index == 0 && method()->is_synchronized()) { |
| 249 | _synch_lock = flock; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | // Use the raw liveness computation to make sure that unexpected |
| 254 | // values don't propagate into the OSR frame. |
| 255 | MethodLivenessResult live_locals = method()->liveness_at_bci(osr_bci()); |
| 256 | if (!live_locals.is_valid()) { |
| 257 | // Degenerate or breakpointed method. |
| 258 | C->record_method_not_compilable("OSR in empty or breakpointed method"); |
| 259 | return; |
| 260 | } |
| 261 | |
| 262 | // Extract the needed locals from the interpreter frame. |
| 263 | Node *locals_addr = basic_plus_adr(osr_buf, osr_buf, (max_locals-1)*wordSize); |
| 264 | |
| 265 | // find all the locals that the interpreter thinks contain live oops |
| 266 | const ResourceBitMap live_oops = method()->live_local_oops_at_bci(osr_bci()); |
| 267 | for (index = 0; index < max_locals; index++) { |
| 268 | |
| 269 | if (!live_locals.at(index)) { |
| 270 | continue; |
| 271 | } |
| 272 | |
| 273 | const Type *type = osr_block->local_type_at(index); |
| 274 | |
| 275 | if (type->isa_oopptr() != NULL__null) { |
| 276 | |
| 277 | // 6403625: Verify that the interpreter oopMap thinks that the oop is live |
| 278 | // else we might load a stale oop if the MethodLiveness disagrees with the |
| 279 | // result of the interpreter. If the interpreter says it is dead we agree |
| 280 | // by making the value go to top. |
| 281 | // |
| 282 | |
| 283 | if (!live_oops.at(index)) { |
| 284 | if (C->log() != NULL__null) { |
| 285 | C->log()->elem("OSR_mismatch local_index='%d'",index); |
| 286 | } |
| 287 | set_local(index, null()); |
| 288 | // and ignore it for the loads |
| 289 | continue; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | // Filter out TOP, HALF, and BOTTOM. (Cf. ensure_phi.) |
| 294 | if (type == Type::TOP || type == Type::HALF) { |
| 295 | continue; |
| 296 | } |
| 297 | // If the type falls to bottom, then this must be a local that |
| 298 | // is mixing ints and oops or some such. Forcing it to top |
| 299 | // makes it go dead. |
| 300 | if (type == Type::BOTTOM) { |
| 301 | continue; |
| 302 | } |
| 303 | // Construct code to access the appropriate local. |
| 304 | BasicType bt = type->basic_type(); |
| 305 | if (type == TypePtr::NULL_PTR) { |
| 306 | // Ptr types are mixed together with T_ADDRESS but NULL is |
| 307 | // really for T_OBJECT types so correct it. |
| 308 | bt = T_OBJECT; |
| 309 | } |
| 310 | Node *value = fetch_interpreter_state(index, bt, locals_addr, osr_buf); |
| 311 | set_local(index, value); |
| 312 | } |
| 313 | |
| 314 | // Extract the needed stack entries from the interpreter frame. |
| 315 | for (index = 0; index < sp(); index++) { |
| 316 | const Type *type = osr_block->stack_type_at(index); |
| 317 | if (type != Type::TOP) { |
| 318 | // Currently the compiler bails out when attempting to on stack replace |
| 319 | // at a bci with a non-empty stack. We should not reach here. |
| 320 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 320); ::breakpoint(); } while (0); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | // End the OSR migration |
| 325 | make_runtime_call(RC_LEAF, OptoRuntime::osr_end_Type(), |
| 326 | CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end)((address)((address_word)(SharedRuntime::OSR_migration_end))), |
| 327 | "OSR_migration_end", TypeRawPtr::BOTTOM, |
| 328 | osr_buf); |
| 329 | |
| 330 | // Now that the interpreter state is loaded, make sure it will match |
| 331 | // at execution time what the compiler is expecting now: |
| 332 | SafePointNode* bad_type_exit = clone_map(); |
| 333 | bad_type_exit->set_control(new RegionNode(1)); |
| 334 | |
| 335 | assert(osr_block->flow()->jsrs()->size() == 0, "should be no jsrs live at osr point")do { if (!(osr_block->flow()->jsrs()->size() == 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 335, "assert(" "osr_block->flow()->jsrs()->size() == 0" ") failed", "should be no jsrs live at osr point"); ::breakpoint (); } } while (0); |
| 336 | for (index = 0; index < max_locals; index++) { |
| 337 | if (stopped()) break; |
| 338 | Node* l = local(index); |
| 339 | if (l->is_top()) continue; // nothing here |
| 340 | const Type *type = osr_block->local_type_at(index); |
| 341 | if (type->isa_oopptr() != NULL__null) { |
| 342 | if (!live_oops.at(index)) { |
| 343 | // skip type check for dead oops |
| 344 | continue; |
| 345 | } |
| 346 | } |
| 347 | if (osr_block->flow()->local_type_at(index)->is_return_address()) { |
| 348 | // In our current system it's illegal for jsr addresses to be |
| 349 | // live into an OSR entry point because the compiler performs |
| 350 | // inlining of jsrs. ciTypeFlow has a bailout that detect this |
| 351 | // case and aborts the compile if addresses are live into an OSR |
| 352 | // entry point. Because of that we can assume that any address |
| 353 | // locals at the OSR entry point are dead. Method liveness |
| 354 | // isn't precise enought to figure out that they are dead in all |
| 355 | // cases so simply skip checking address locals all |
| 356 | // together. Any type check is guaranteed to fail since the |
| 357 | // interpreter type is the result of a load which might have any |
| 358 | // value and the expected type is a constant. |
| 359 | continue; |
| 360 | } |
| 361 | set_local(index, check_interpreter_type(l, type, bad_type_exit)); |
| 362 | } |
| 363 | |
| 364 | for (index = 0; index < sp(); index++) { |
| 365 | if (stopped()) break; |
| 366 | Node* l = stack(index); |
| 367 | if (l->is_top()) continue; // nothing here |
| 368 | const Type *type = osr_block->stack_type_at(index); |
| 369 | set_stack(index, check_interpreter_type(l, type, bad_type_exit)); |
| 370 | } |
| 371 | |
| 372 | if (bad_type_exit->control()->req() > 1) { |
| 373 | // Build an uncommon trap here, if any inputs can be unexpected. |
| 374 | bad_type_exit->set_control(_gvn.transform( bad_type_exit->control() )); |
| 375 | record_for_igvn(bad_type_exit->control()); |
| 376 | SafePointNode* types_are_good = map(); |
| 377 | set_map(bad_type_exit); |
| 378 | // The unexpected type happens because a new edge is active |
| 379 | // in the CFG, which typeflow had previously ignored. |
| 380 | // E.g., Object x = coldAtFirst() && notReached()? "str": new Integer(123). |
| 381 | // This x will be typed as Integer if notReached is not yet linked. |
| 382 | // It could also happen due to a problem in ciTypeFlow analysis. |
| 383 | uncommon_trap(Deoptimization::Reason_constraint, |
| 384 | Deoptimization::Action_reinterpret); |
| 385 | set_map(types_are_good); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | //------------------------------Parse------------------------------------------ |
| 390 | // Main parser constructor. |
| 391 | Parse::Parse(JVMState* caller, ciMethod* parse_method, float expected_uses) |
| 392 | : _exits(caller) |
| 393 | { |
| 394 | // Init some variables |
| 395 | _caller = caller; |
| 396 | _method = parse_method; |
| 397 | _expected_uses = expected_uses; |
| 398 | _depth = 1 + (caller->has_method() ? caller->depth() : 0); |
| 399 | _wrote_final = false; |
| 400 | _wrote_volatile = false; |
| 401 | _wrote_stable = false; |
| 402 | _wrote_fields = false; |
| 403 | _alloc_with_final = NULL__null; |
| 404 | _entry_bci = InvocationEntryBci; |
| 405 | _tf = NULL__null; |
| 406 | _block = NULL__null; |
| 407 | _first_return = true; |
| 408 | _replaced_nodes_for_exceptions = false; |
| 409 | _new_idx = C->unique(); |
| 410 | debug_only(_block_count = -1)_block_count = -1; |
| 411 | debug_only(_blocks = (Block*)-1)_blocks = (Block*)-1; |
| 412 | #ifndef PRODUCT |
| 413 | if (PrintCompilation || PrintOpto) { |
| 414 | // Make sure I have an inline tree, so I can print messages about it. |
| 415 | JVMState* ilt_caller = is_osr_parse() ? caller->caller() : caller; |
| 416 | InlineTree::find_subtree_from_root(C->ilt(), ilt_caller, parse_method); |
| 417 | } |
| 418 | _max_switch_depth = 0; |
| 419 | _est_switch_depth = 0; |
| 420 | #endif |
| 421 | |
| 422 | if (parse_method->has_reserved_stack_access()) { |
| 423 | C->set_has_reserved_stack_access(true); |
| 424 | } |
| 425 | |
| 426 | _tf = TypeFunc::make(method()); |
| 427 | _iter.reset_to_method(method()); |
| 428 | _flow = method()->get_flow_analysis(); |
| 429 | if (_flow->failing()) { |
| 430 | C->record_method_not_compilable(_flow->failure_reason()); |
| 431 | } |
| 432 | |
| 433 | #ifndef PRODUCT |
| 434 | if (_flow->has_irreducible_entry()) { |
| 435 | C->set_parsed_irreducible_loop(true); |
| 436 | } |
| 437 | #endif |
| 438 | C->set_has_loops(C->has_loops() || method()->has_loops()); |
| 439 | |
| 440 | if (_expected_uses <= 0) { |
| 441 | _prof_factor = 1; |
| 442 | } else { |
| 443 | float prof_total = parse_method->interpreter_invocation_count(); |
| 444 | if (prof_total <= _expected_uses) { |
| 445 | _prof_factor = 1; |
| 446 | } else { |
| 447 | _prof_factor = _expected_uses / prof_total; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | CompileLog* log = C->log(); |
| 452 | if (log != NULL__null) { |
| 453 | log->begin_head("parse method='%d' uses='%f'", |
| 454 | log->identify(parse_method), expected_uses); |
| 455 | if (depth() == 1 && C->is_osr_compilation()) { |
| 456 | log->print(" osr_bci='%d'", C->entry_bci()); |
| 457 | } |
| 458 | log->stamp(); |
| 459 | log->end_head(); |
| 460 | } |
| 461 | |
| 462 | // Accumulate deoptimization counts. |
| 463 | // (The range_check and store_check counts are checked elsewhere.) |
| 464 | ciMethodData* md = method()->method_data(); |
| 465 | for (uint reason = 0; reason < md->trap_reason_limit(); reason++) { |
| 466 | uint md_count = md->trap_count(reason); |
| 467 | if (md_count != 0) { |
| 468 | if (md_count == md->trap_count_limit()) |
| 469 | md_count += md->overflow_trap_count(); |
| 470 | uint total_count = C->trap_count(reason); |
| 471 | uint old_count = total_count; |
| 472 | total_count += md_count; |
| 473 | // Saturate the add if it overflows. |
| 474 | if (total_count < old_count || total_count < md_count) |
| 475 | total_count = (uint)-1; |
| 476 | C->set_trap_count(reason, total_count); |
| 477 | if (log != NULL__null) |
| 478 | log->elem("observe trap='%s' count='%d' total='%d'", |
| 479 | Deoptimization::trap_reason_name(reason), |
| 480 | md_count, total_count); |
| 481 | } |
| 482 | } |
| 483 | // Accumulate total sum of decompilations, also. |
| 484 | C->set_decompile_count(C->decompile_count() + md->decompile_count()); |
| 485 | |
| 486 | if (log != NULL__null && method()->has_exception_handlers()) { |
| 487 | log->elem("observe that='has_exception_handlers'"); |
| 488 | } |
| 489 | |
| 490 | assert(InlineTree::check_can_parse(method()) == NULL, "Can not parse this method, cutout earlier")do { if (!(InlineTree::check_can_parse(method()) == __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 490, "assert(" "InlineTree::check_can_parse(method()) == __null" ") failed", "Can not parse this method, cutout earlier"); :: breakpoint(); } } while (0); |
| 491 | assert(method()->has_balanced_monitors(), "Can not parse unbalanced monitors, cutout earlier")do { if (!(method()->has_balanced_monitors())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 491, "assert(" "method()->has_balanced_monitors()" ") failed" , "Can not parse unbalanced monitors, cutout earlier"); ::breakpoint (); } } while (0); |
| 492 | |
| 493 | // Always register dependence if JVMTI is enabled, because |
| 494 | // either breakpoint setting or hotswapping of methods may |
| 495 | // cause deoptimization. |
| 496 | if (C->env()->jvmti_can_hotswap_or_post_breakpoint()) { |
| 497 | C->dependencies()->assert_evol_method(method()); |
| 498 | } |
| 499 | |
| 500 | NOT_PRODUCT(methods_seen++)methods_seen++; |
| 501 | |
| 502 | // Do some special top-level things. |
| 503 | if (depth() == 1 && C->is_osr_compilation()) { |
| 504 | _entry_bci = C->entry_bci(); |
| 505 | _flow = method()->get_osr_flow_analysis(osr_bci()); |
| 506 | if (_flow->failing()) { |
| 507 | C->record_method_not_compilable(_flow->failure_reason()); |
| 508 | #ifndef PRODUCT |
| 509 | if (PrintOpto && (Verbose || WizardMode)) { |
| 510 | tty->print_cr("OSR @%d type flow bailout: %s", _entry_bci, _flow->failure_reason()); |
| 511 | if (Verbose) { |
| 512 | method()->print(); |
| 513 | method()->print_codes(); |
| 514 | _flow->print(); |
| 515 | } |
| 516 | } |
| 517 | #endif |
| 518 | } |
| 519 | _tf = C->tf(); // the OSR entry type is different |
| 520 | } |
| 521 | |
| 522 | #ifdef ASSERT1 |
| 523 | if (depth() == 1) { |
| 524 | assert(C->is_osr_compilation() == this->is_osr_parse(), "OSR in sync")do { if (!(C->is_osr_compilation() == this->is_osr_parse ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 524, "assert(" "C->is_osr_compilation() == this->is_osr_parse()" ") failed", "OSR in sync"); ::breakpoint(); } } while (0); |
| 525 | } else { |
| 526 | assert(!this->is_osr_parse(), "no recursive OSR")do { if (!(!this->is_osr_parse())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 526, "assert(" "!this->is_osr_parse()" ") failed", "no recursive OSR" ); ::breakpoint(); } } while (0); |
| 527 | } |
| 528 | #endif |
| 529 | |
| 530 | #ifndef PRODUCT |
| 531 | methods_parsed++; |
| 532 | // add method size here to guarantee that inlined methods are added too |
| 533 | if (CITime) |
| 534 | _total_bytes_compiled += method()->code_size(); |
| 535 | |
| 536 | show_parse_info(); |
| 537 | #endif |
| 538 | |
| 539 | if (failing()) { |
| 540 | if (log) log->done("parse"); |
| 541 | return; |
| 542 | } |
| 543 | |
| 544 | gvn().set_type(root(), root()->bottom_type()); |
| 545 | gvn().transform(top()); |
| 546 | |
| 547 | // Import the results of the ciTypeFlow. |
| 548 | init_blocks(); |
| 549 | |
| 550 | // Merge point for all normal exits |
| 551 | build_exits(); |
| 552 | |
| 553 | // Setup the initial JVM state map. |
| 554 | SafePointNode* entry_map = create_entry_map(); |
| 555 | |
| 556 | // Check for bailouts during map initialization |
| 557 | if (failing() || entry_map == NULL__null) { |
| 558 | if (log) log->done("parse"); |
| 559 | return; |
| 560 | } |
| 561 | |
| 562 | Node_Notes* caller_nn = C->default_node_notes(); |
| 563 | // Collect debug info for inlined calls unless -XX:-DebugInlinedCalls. |
| 564 | if (DebugInlinedCalls || depth() == 1) { |
| 565 | C->set_default_node_notes(make_node_notes(caller_nn)); |
| 566 | } |
| 567 | |
| 568 | if (is_osr_parse()) { |
| 569 | Node* osr_buf = entry_map->in(TypeFunc::Parms+0); |
| 570 | entry_map->set_req(TypeFunc::Parms+0, top()); |
| 571 | set_map(entry_map); |
| 572 | load_interpreter_state(osr_buf); |
| 573 | } else { |
| 574 | set_map(entry_map); |
| 575 | do_method_entry(); |
| 576 | if (depth() == 1 && C->age_code()) { |
| 577 | decrement_age(); |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | if (depth() == 1 && !failing()) { |
| 582 | if (C->clinit_barrier_on_entry()) { |
| 583 | // Add check to deoptimize the nmethod once the holder class is fully initialized |
| 584 | clinit_deopt(); |
| 585 | } |
| 586 | |
| 587 | // Add check to deoptimize the nmethod if RTM state was changed |
| 588 | rtm_deopt(); |
| 589 | } |
| 590 | |
| 591 | // Check for bailouts during method entry or RTM state check setup. |
| 592 | if (failing()) { |
| 593 | if (log) log->done("parse"); |
| 594 | C->set_default_node_notes(caller_nn); |
| 595 | return; |
| 596 | } |
| 597 | |
| 598 | entry_map = map(); // capture any changes performed by method setup code |
| 599 | assert(jvms()->endoff() == map()->req(), "map matches JVMS layout")do { if (!(jvms()->endoff() == map()->req())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 599, "assert(" "jvms()->endoff() == map()->req()" ") failed" , "map matches JVMS layout"); ::breakpoint(); } } while (0); |
| 600 | |
| 601 | // We begin parsing as if we have just encountered a jump to the |
| 602 | // method entry. |
| 603 | Block* entry_block = start_block(); |
| 604 | assert(entry_block->start() == (is_osr_parse() ? osr_bci() : 0), "")do { if (!(entry_block->start() == (is_osr_parse() ? osr_bci () : 0))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 604, "assert(" "entry_block->start() == (is_osr_parse() ? osr_bci() : 0)" ") failed", ""); ::breakpoint(); } } while (0); |
| 605 | set_map_clone(entry_map); |
| 606 | merge_common(entry_block, entry_block->next_path_num()); |
| 607 | |
| 608 | #ifndef PRODUCT |
| 609 | BytecodeParseHistogram *parse_histogram_obj = new (C->env()->arena()) BytecodeParseHistogram(this, C); |
| 610 | set_parse_histogram( parse_histogram_obj ); |
| 611 | #endif |
| 612 | |
| 613 | // Parse all the basic blocks. |
| 614 | do_all_blocks(); |
| 615 | |
| 616 | C->set_default_node_notes(caller_nn); |
| 617 | |
| 618 | // Check for bailouts during conversion to graph |
| 619 | if (failing()) { |
| 620 | if (log) log->done("parse"); |
| 621 | return; |
| 622 | } |
| 623 | |
| 624 | // Fix up all exiting control flow. |
| 625 | set_map(entry_map); |
| 626 | do_exits(); |
| 627 | |
| 628 | if (log) log->done("parse nodes='%d' live='%d' memory='" SIZE_FORMAT"%" "l" "u" "'", |
| 629 | C->unique(), C->live_nodes(), C->node_arena()->used()); |
| 630 | } |
| 631 | |
| 632 | //---------------------------do_all_blocks------------------------------------- |
| 633 | void Parse::do_all_blocks() { |
| 634 | bool has_irreducible = flow()->has_irreducible_entry(); |
| 635 | |
| 636 | // Walk over all blocks in Reverse Post-Order. |
| 637 | while (true) { |
| 638 | bool progress = false; |
| 639 | for (int rpo = 0; rpo < block_count(); rpo++) { |
| 640 | Block* block = rpo_at(rpo); |
| 641 | |
| 642 | if (block->is_parsed()) continue; |
| 643 | |
| 644 | if (!block->is_merged()) { |
| 645 | // Dead block, no state reaches this block |
| 646 | continue; |
| 647 | } |
| 648 | |
| 649 | // Prepare to parse this block. |
| 650 | load_state_from(block); |
| 651 | |
| 652 | if (stopped()) { |
| 653 | // Block is dead. |
| 654 | continue; |
| 655 | } |
| 656 | |
| 657 | NOT_PRODUCT(blocks_parsed++)blocks_parsed++; |
| 658 | |
| 659 | progress = true; |
| 660 | if (block->is_loop_head() || block->is_handler() || (has_irreducible && !block->is_ready())) { |
| 661 | // Not all preds have been parsed. We must build phis everywhere. |
| 662 | // (Note that dead locals do not get phis built, ever.) |
| 663 | ensure_phis_everywhere(); |
| 664 | |
| 665 | if (block->is_SEL_head()) { |
| 666 | // Add predicate to single entry (not irreducible) loop head. |
| 667 | assert(!block->has_merged_backedge(), "only entry paths should be merged for now")do { if (!(!block->has_merged_backedge())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 667, "assert(" "!block->has_merged_backedge()" ") failed" , "only entry paths should be merged for now"); ::breakpoint( ); } } while (0); |
| 668 | // Predicates may have been added after a dominating if |
| 669 | if (!block->has_predicates()) { |
| 670 | // Need correct bci for predicate. |
| 671 | // It is fine to set it here since do_one_block() will set it anyway. |
| 672 | set_parse_bci(block->start()); |
| 673 | add_empty_predicates(); |
| 674 | } |
| 675 | // Add new region for back branches. |
| 676 | int edges = block->pred_count() - block->preds_parsed() + 1; // +1 for original region |
| 677 | RegionNode *r = new RegionNode(edges+1); |
| 678 | _gvn.set_type(r, Type::CONTROL); |
| 679 | record_for_igvn(r); |
| 680 | r->init_req(edges, control()); |
| 681 | set_control(r); |
| 682 | // Add new phis. |
| 683 | ensure_phis_everywhere(); |
| 684 | } |
| 685 | |
| 686 | // Leave behind an undisturbed copy of the map, for future merges. |
| 687 | set_map(clone_map()); |
| 688 | } |
| 689 | |
| 690 | if (control()->is_Region() && !block->is_loop_head() && !has_irreducible && !block->is_handler()) { |
| 691 | // In the absence of irreducible loops, the Region and Phis |
| 692 | // associated with a merge that doesn't involve a backedge can |
| 693 | // be simplified now since the RPO parsing order guarantees |
| 694 | // that any path which was supposed to reach here has already |
| 695 | // been parsed or must be dead. |
| 696 | Node* c = control(); |
| 697 | Node* result = _gvn.transform_no_reclaim(control()); |
| 698 | if (c != result && TraceOptoParse) { |
| 699 | tty->print_cr("Block #%d replace %d with %d", block->rpo(), c->_idx, result->_idx); |
| 700 | } |
| 701 | if (result != top()) { |
| 702 | record_for_igvn(result); |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | // Parse the block. |
| 707 | do_one_block(); |
| 708 | |
| 709 | // Check for bailouts. |
| 710 | if (failing()) return; |
| 711 | } |
| 712 | |
| 713 | // with irreducible loops multiple passes might be necessary to parse everything |
| 714 | if (!has_irreducible || !progress) { |
| 715 | break; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | #ifndef PRODUCT |
| 720 | blocks_seen += block_count(); |
| 721 | |
| 722 | // Make sure there are no half-processed blocks remaining. |
| 723 | // Every remaining unprocessed block is dead and may be ignored now. |
| 724 | for (int rpo = 0; rpo < block_count(); rpo++) { |
| 725 | Block* block = rpo_at(rpo); |
| 726 | if (!block->is_parsed()) { |
| 727 | if (TraceOptoParse) { |
| 728 | tty->print_cr("Skipped dead block %d at bci:%d", rpo, block->start()); |
| 729 | } |
| 730 | assert(!block->is_merged(), "no half-processed blocks")do { if (!(!block->is_merged())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 730, "assert(" "!block->is_merged()" ") failed", "no half-processed blocks" ); ::breakpoint(); } } while (0); |
| 731 | } |
| 732 | } |
| 733 | #endif |
| 734 | } |
| 735 | |
| 736 | static Node* mask_int_value(Node* v, BasicType bt, PhaseGVN* gvn) { |
| 737 | switch (bt) { |
| 738 | case T_BYTE: |
| 739 | v = gvn->transform(new LShiftINode(v, gvn->intcon(24))); |
| 740 | v = gvn->transform(new RShiftINode(v, gvn->intcon(24))); |
| 741 | break; |
| 742 | case T_SHORT: |
| 743 | v = gvn->transform(new LShiftINode(v, gvn->intcon(16))); |
| 744 | v = gvn->transform(new RShiftINode(v, gvn->intcon(16))); |
| 745 | break; |
| 746 | case T_CHAR: |
| 747 | v = gvn->transform(new AndINode(v, gvn->intcon(0xFFFF))); |
| 748 | break; |
| 749 | case T_BOOLEAN: |
| 750 | v = gvn->transform(new AndINode(v, gvn->intcon(0x1))); |
| 751 | break; |
| 752 | default: |
| 753 | break; |
| 754 | } |
| 755 | return v; |
| 756 | } |
| 757 | |
| 758 | //-------------------------------build_exits---------------------------------- |
| 759 | // Build normal and exceptional exit merge points. |
| 760 | void Parse::build_exits() { |
| 761 | // make a clone of caller to prevent sharing of side-effects |
| 762 | _exits.set_map(_exits.clone_map()); |
| 763 | _exits.clean_stack(_exits.sp()); |
| 764 | _exits.sync_jvms(); |
| 765 | |
| 766 | RegionNode* region = new RegionNode(1); |
| 767 | record_for_igvn(region); |
| 768 | gvn().set_type_bottom(region); |
| 769 | _exits.set_control(region); |
| 770 | |
| 771 | // Note: iophi and memphi are not transformed until do_exits. |
| 772 | Node* iophi = new PhiNode(region, Type::ABIO); |
| 773 | Node* memphi = new PhiNode(region, Type::MEMORY, TypePtr::BOTTOM); |
| 774 | gvn().set_type_bottom(iophi); |
| 775 | gvn().set_type_bottom(memphi); |
| 776 | _exits.set_i_o(iophi); |
| 777 | _exits.set_all_memory(memphi); |
| 778 | |
| 779 | // Add a return value to the exit state. (Do not push it yet.) |
| 780 | if (tf()->range()->cnt() > TypeFunc::Parms) { |
| 781 | const Type* ret_type = tf()->range()->field_at(TypeFunc::Parms); |
| 782 | if (ret_type->isa_int()) { |
| 783 | BasicType ret_bt = method()->return_type()->basic_type(); |
| 784 | if (ret_bt == T_BOOLEAN || |
| 785 | ret_bt == T_CHAR || |
| 786 | ret_bt == T_BYTE || |
| 787 | ret_bt == T_SHORT) { |
| 788 | ret_type = TypeInt::INT; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | // Don't "bind" an unloaded return klass to the ret_phi. If the klass |
| 793 | // becomes loaded during the subsequent parsing, the loaded and unloaded |
| 794 | // types will not join when we transform and push in do_exits(). |
| 795 | const TypeOopPtr* ret_oop_type = ret_type->isa_oopptr(); |
| 796 | if (ret_oop_type && !ret_oop_type->klass()->is_loaded()) { |
| 797 | ret_type = TypeOopPtr::BOTTOM; |
| 798 | } |
| 799 | int ret_size = type2size[ret_type->basic_type()]; |
| 800 | Node* ret_phi = new PhiNode(region, ret_type); |
| 801 | gvn().set_type_bottom(ret_phi); |
| 802 | _exits.ensure_stack(ret_size); |
| 803 | assert((int)(tf()->range()->cnt() - TypeFunc::Parms) == ret_size, "good tf range")do { if (!((int)(tf()->range()->cnt() - TypeFunc::Parms ) == ret_size)) { (*g_assert_poison) = 'X';; report_vm_error( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 803, "assert(" "(int)(tf()->range()->cnt() - TypeFunc::Parms) == ret_size" ") failed", "good tf range"); ::breakpoint(); } } while (0); |
| 804 | assert(method()->return_type()->size() == ret_size, "tf agrees w/ method")do { if (!(method()->return_type()->size() == ret_size) ) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 804, "assert(" "method()->return_type()->size() == ret_size" ") failed", "tf agrees w/ method"); ::breakpoint(); } } while (0); |
| 805 | _exits.set_argument(0, ret_phi); // here is where the parser finds it |
| 806 | // Note: ret_phi is not yet pushed, until do_exits. |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | |
| 811 | //----------------------------build_start_state------------------------------- |
| 812 | // Construct a state which contains only the incoming arguments from an |
| 813 | // unknown caller. The method & bci will be NULL & InvocationEntryBci. |
| 814 | JVMState* Compile::build_start_state(StartNode* start, const TypeFunc* tf) { |
| 815 | int arg_size = tf->domain()->cnt(); |
| 816 | int max_size = MAX2(arg_size, (int)tf->range()->cnt()); |
| 817 | JVMState* jvms = new (this) JVMState(max_size - TypeFunc::Parms); |
| 818 | SafePointNode* map = new SafePointNode(max_size, jvms); |
| 819 | record_for_igvn(map); |
| 820 | assert(arg_size == TypeFunc::Parms + (is_osr_compilation() ? 1 : method()->arg_size()), "correct arg_size")do { if (!(arg_size == TypeFunc::Parms + (is_osr_compilation( ) ? 1 : method()->arg_size()))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 820, "assert(" "arg_size == TypeFunc::Parms + (is_osr_compilation() ? 1 : method()->arg_size())" ") failed", "correct arg_size"); ::breakpoint(); } } while ( 0); |
| 821 | Node_Notes* old_nn = default_node_notes(); |
| 822 | if (old_nn != NULL__null && has_method()) { |
| 823 | Node_Notes* entry_nn = old_nn->clone(this); |
| 824 | JVMState* entry_jvms = new(this) JVMState(method(), old_nn->jvms()); |
| 825 | entry_jvms->set_offsets(0); |
| 826 | entry_jvms->set_bci(entry_bci()); |
| 827 | entry_nn->set_jvms(entry_jvms); |
| 828 | set_default_node_notes(entry_nn); |
| 829 | } |
| 830 | uint i; |
| 831 | for (i = 0; i < (uint)arg_size; i++) { |
| 832 | Node* parm = initial_gvn()->transform(new ParmNode(start, i)); |
| 833 | map->init_req(i, parm); |
| 834 | // Record all these guys for later GVN. |
| 835 | record_for_igvn(parm); |
| 836 | } |
| 837 | for (; i < map->req(); i++) { |
| 838 | map->init_req(i, top()); |
| 839 | } |
| 840 | assert(jvms->argoff() == TypeFunc::Parms, "parser gets arguments here")do { if (!(jvms->argoff() == TypeFunc::Parms)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 840, "assert(" "jvms->argoff() == TypeFunc::Parms" ") failed" , "parser gets arguments here"); ::breakpoint(); } } while (0 ); |
| 841 | set_default_node_notes(old_nn); |
| 842 | jvms->set_map(map); |
| 843 | return jvms; |
| 844 | } |
| 845 | |
| 846 | //-----------------------------make_node_notes--------------------------------- |
| 847 | Node_Notes* Parse::make_node_notes(Node_Notes* caller_nn) { |
| 848 | if (caller_nn == NULL__null) return NULL__null; |
| 849 | Node_Notes* nn = caller_nn->clone(C); |
| 850 | JVMState* caller_jvms = nn->jvms(); |
| 851 | JVMState* jvms = new (C) JVMState(method(), caller_jvms); |
| 852 | jvms->set_offsets(0); |
| 853 | jvms->set_bci(_entry_bci); |
| 854 | nn->set_jvms(jvms); |
| 855 | return nn; |
| 856 | } |
| 857 | |
| 858 | |
| 859 | //--------------------------return_values-------------------------------------- |
| 860 | void Compile::return_values(JVMState* jvms) { |
| 861 | GraphKit kit(jvms); |
| 862 | Node* ret = new ReturnNode(TypeFunc::Parms, |
| 863 | kit.control(), |
| 864 | kit.i_o(), |
| 865 | kit.reset_memory(), |
| 866 | kit.frameptr(), |
| 867 | kit.returnadr()); |
| 868 | // Add zero or 1 return values |
| 869 | int ret_size = tf()->range()->cnt() - TypeFunc::Parms; |
| 870 | if (ret_size > 0) { |
| 871 | kit.inc_sp(-ret_size); // pop the return value(s) |
| 872 | kit.sync_jvms(); |
| 873 | ret->add_req(kit.argument(0)); |
| 874 | // Note: The second dummy edge is not needed by a ReturnNode. |
| 875 | } |
| 876 | // bind it to root |
| 877 | root()->add_req(ret); |
| 878 | record_for_igvn(ret); |
| 879 | initial_gvn()->transform_no_reclaim(ret); |
| 880 | } |
| 881 | |
| 882 | //------------------------rethrow_exceptions----------------------------------- |
| 883 | // Bind all exception states in the list into a single RethrowNode. |
| 884 | void Compile::rethrow_exceptions(JVMState* jvms) { |
| 885 | GraphKit kit(jvms); |
| 886 | if (!kit.has_exceptions()) return; // nothing to generate |
| 887 | // Load my combined exception state into the kit, with all phis transformed: |
| 888 | SafePointNode* ex_map = kit.combine_and_pop_all_exception_states(); |
| 889 | Node* ex_oop = kit.use_exception_state(ex_map); |
| 890 | RethrowNode* exit = new RethrowNode(kit.control(), |
| 891 | kit.i_o(), kit.reset_memory(), |
| 892 | kit.frameptr(), kit.returnadr(), |
| 893 | // like a return but with exception input |
| 894 | ex_oop); |
| 895 | // bind to root |
| 896 | root()->add_req(exit); |
| 897 | record_for_igvn(exit); |
| 898 | initial_gvn()->transform_no_reclaim(exit); |
| 899 | } |
| 900 | |
| 901 | //---------------------------do_exceptions------------------------------------- |
| 902 | // Process exceptions arising from the current bytecode. |
| 903 | // Send caught exceptions to the proper handler within this method. |
| 904 | // Unhandled exceptions feed into _exit. |
| 905 | void Parse::do_exceptions() { |
| 906 | if (!has_exceptions()) return; |
| 907 | |
| 908 | if (failing()) { |
| 909 | // Pop them all off and throw them away. |
| 910 | while (pop_exception_state() != NULL__null) ; |
| 911 | return; |
| 912 | } |
| 913 | |
| 914 | PreserveJVMState pjvms(this, false); |
| 915 | |
| 916 | SafePointNode* ex_map; |
| 917 | while ((ex_map = pop_exception_state()) != NULL__null) { |
| 918 | if (!method()->has_exception_handlers()) { |
| 919 | // Common case: Transfer control outward. |
| 920 | // Doing it this early allows the exceptions to common up |
| 921 | // even between adjacent method calls. |
| 922 | throw_to_exit(ex_map); |
| 923 | } else { |
| 924 | // Have to look at the exception first. |
| 925 | assert(stopped(), "catch_inline_exceptions trashes the map")do { if (!(stopped())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 925, "assert(" "stopped()" ") failed", "catch_inline_exceptions trashes the map" ); ::breakpoint(); } } while (0); |
| 926 | catch_inline_exceptions(ex_map); |
| 927 | stop_and_kill_map(); // we used up this exception state; kill it |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | // We now return to our regularly scheduled program: |
| 932 | } |
| 933 | |
| 934 | //---------------------------throw_to_exit------------------------------------- |
| 935 | // Merge the given map into an exception exit from this method. |
| 936 | // The exception exit will handle any unlocking of receiver. |
| 937 | // The ex_oop must be saved within the ex_map, unlike merge_exception. |
| 938 | void Parse::throw_to_exit(SafePointNode* ex_map) { |
| 939 | // Pop the JVMS to (a copy of) the caller. |
| 940 | GraphKit caller; |
| 941 | caller.set_map_clone(_caller->map()); |
| 942 | caller.set_bci(_caller->bci()); |
| 943 | caller.set_sp(_caller->sp()); |
| 944 | // Copy out the standard machine state: |
| 945 | for (uint i = 0; i < TypeFunc::Parms; i++) { |
| 946 | caller.map()->set_req(i, ex_map->in(i)); |
| 947 | } |
| 948 | if (ex_map->has_replaced_nodes()) { |
| 949 | _replaced_nodes_for_exceptions = true; |
| 950 | } |
| 951 | caller.map()->transfer_replaced_nodes_from(ex_map, _new_idx); |
| 952 | // ...and the exception: |
| 953 | Node* ex_oop = saved_ex_oop(ex_map); |
| 954 | SafePointNode* caller_ex_map = caller.make_exception_state(ex_oop); |
| 955 | // Finally, collect the new exception state in my exits: |
| 956 | _exits.add_exception_state(caller_ex_map); |
| 957 | } |
| 958 | |
| 959 | //------------------------------do_exits--------------------------------------- |
| 960 | void Parse::do_exits() { |
| 961 | set_parse_bci(InvocationEntryBci); |
| 962 | |
| 963 | // Now peephole on the return bits |
| 964 | Node* region = _exits.control(); |
| 965 | _exits.set_control(gvn().transform(region)); |
| 966 | |
| 967 | Node* iophi = _exits.i_o(); |
| 968 | _exits.set_i_o(gvn().transform(iophi)); |
| 969 | |
| 970 | // Figure out if we need to emit the trailing barrier. The barrier is only |
| 971 | // needed in the constructors, and only in three cases: |
| 972 | // |
| 973 | // 1. The constructor wrote a final. The effects of all initializations |
| 974 | // must be committed to memory before any code after the constructor |
| 975 | // publishes the reference to the newly constructed object. Rather |
| 976 | // than wait for the publication, we simply block the writes here. |
| 977 | // Rather than put a barrier on only those writes which are required |
| 978 | // to complete, we force all writes to complete. |
| 979 | // |
| 980 | // 2. Experimental VM option is used to force the barrier if any field |
| 981 | // was written out in the constructor. |
| 982 | // |
| 983 | // 3. On processors which are not CPU_MULTI_COPY_ATOMIC (e.g. PPC64), |
| 984 | // support_IRIW_for_not_multiple_copy_atomic_cpu selects that |
| 985 | // MemBarVolatile is used before volatile load instead of after volatile |
| 986 | // store, so there's no barrier after the store. |
| 987 | // We want to guarantee the same behavior as on platforms with total store |
| 988 | // order, although this is not required by the Java memory model. |
| 989 | // In this case, we want to enforce visibility of volatile field |
| 990 | // initializations which are performed in constructors. |
| 991 | // So as with finals, we add a barrier here. |
| 992 | // |
| 993 | // "All bets are off" unless the first publication occurs after a |
| 994 | // normal return from the constructor. We do not attempt to detect |
| 995 | // such unusual early publications. But no barrier is needed on |
| 996 | // exceptional returns, since they cannot publish normally. |
| 997 | // |
| 998 | if (method()->is_initializer() && |
| 999 | (wrote_final() || |
| 1000 | (AlwaysSafeConstructors && wrote_fields()) || |
| 1001 | (support_IRIW_for_not_multiple_copy_atomic_cpu && wrote_volatile()))) { |
| 1002 | _exits.insert_mem_bar(Op_MemBarRelease, alloc_with_final()); |
| 1003 | |
| 1004 | // If Memory barrier is created for final fields write |
| 1005 | // and allocation node does not escape the initialize method, |
| 1006 | // then barrier introduced by allocation node can be removed. |
| 1007 | if (DoEscapeAnalysis && alloc_with_final()) { |
| 1008 | AllocateNode *alloc = AllocateNode::Ideal_allocation(alloc_with_final(), &_gvn); |
| 1009 | alloc->compute_MemBar_redundancy(method()); |
| 1010 | } |
| 1011 | if (PrintOpto && (Verbose || WizardMode)) { |
| 1012 | method()->print_name(); |
| 1013 | tty->print_cr(" writes finals and needs a memory barrier"); |
| 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | // Any method can write a @Stable field; insert memory barriers |
| 1018 | // after those also. Can't bind predecessor allocation node (if any) |
| 1019 | // with barrier because allocation doesn't always dominate |
| 1020 | // MemBarRelease. |
| 1021 | if (wrote_stable()) { |
| 1022 | _exits.insert_mem_bar(Op_MemBarRelease); |
| 1023 | if (PrintOpto && (Verbose || WizardMode)) { |
| 1024 | method()->print_name(); |
| 1025 | tty->print_cr(" writes @Stable and needs a memory barrier"); |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | for (MergeMemStream mms(_exits.merged_memory()); mms.next_non_empty(); ) { |
| 1030 | // transform each slice of the original memphi: |
| 1031 | mms.set_memory(_gvn.transform(mms.memory())); |
| 1032 | } |
| 1033 | // Clean up input MergeMems created by transforming the slices |
| 1034 | _gvn.transform(_exits.merged_memory()); |
| 1035 | |
| 1036 | if (tf()->range()->cnt() > TypeFunc::Parms) { |
| 1037 | const Type* ret_type = tf()->range()->field_at(TypeFunc::Parms); |
| 1038 | Node* ret_phi = _gvn.transform( _exits.argument(0) ); |
| 1039 | if (!_exits.control()->is_top() && _gvn.type(ret_phi)->empty()) { |
| 1040 | // If the type we set for the ret_phi in build_exits() is too optimistic and |
| 1041 | // the ret_phi is top now, there's an extremely small chance that it may be due to class |
| 1042 | // loading. It could also be due to an error, so mark this method as not compilable because |
| 1043 | // otherwise this could lead to an infinite compile loop. |
| 1044 | // In any case, this code path is rarely (and never in my testing) reached. |
| 1045 | C->record_method_not_compilable("Can't determine return type."); |
| 1046 | return; |
| 1047 | } |
| 1048 | if (ret_type->isa_int()) { |
| 1049 | BasicType ret_bt = method()->return_type()->basic_type(); |
| 1050 | ret_phi = mask_int_value(ret_phi, ret_bt, &_gvn); |
| 1051 | } |
| 1052 | _exits.push_node(ret_type->basic_type(), ret_phi); |
| 1053 | } |
| 1054 | |
| 1055 | // Note: Logic for creating and optimizing the ReturnNode is in Compile. |
| 1056 | |
| 1057 | // Unlock along the exceptional paths. |
| 1058 | // This is done late so that we can common up equivalent exceptions |
| 1059 | // (e.g., null checks) arising from multiple points within this method. |
| 1060 | // See GraphKit::add_exception_state, which performs the commoning. |
| 1061 | bool do_synch = method()->is_synchronized() && GenerateSynchronizationCode; |
| 1062 | |
| 1063 | // record exit from a method if compiled while Dtrace is turned on. |
| 1064 | if (do_synch || C->env()->dtrace_method_probes() || _replaced_nodes_for_exceptions) { |
| 1065 | // First move the exception list out of _exits: |
| 1066 | GraphKit kit(_exits.transfer_exceptions_into_jvms()); |
| 1067 | SafePointNode* normal_map = kit.map(); // keep this guy safe |
| 1068 | // Now re-collect the exceptions into _exits: |
| 1069 | SafePointNode* ex_map; |
| 1070 | while ((ex_map = kit.pop_exception_state()) != NULL__null) { |
| 1071 | Node* ex_oop = kit.use_exception_state(ex_map); |
| 1072 | // Force the exiting JVM state to have this method at InvocationEntryBci. |
| 1073 | // The exiting JVM state is otherwise a copy of the calling JVMS. |
| 1074 | JVMState* caller = kit.jvms(); |
| 1075 | JVMState* ex_jvms = caller->clone_shallow(C); |
| 1076 | ex_jvms->bind_map(kit.clone_map()); |
| 1077 | ex_jvms->set_bci( InvocationEntryBci); |
| 1078 | kit.set_jvms(ex_jvms); |
| 1079 | if (do_synch) { |
| 1080 | // Add on the synchronized-method box/object combo |
| 1081 | kit.map()->push_monitor(_synch_lock); |
| 1082 | // Unlock! |
| 1083 | kit.shared_unlock(_synch_lock->box_node(), _synch_lock->obj_node()); |
| 1084 | } |
| 1085 | if (C->env()->dtrace_method_probes()) { |
| 1086 | kit.make_dtrace_method_exit(method()); |
| 1087 | } |
| 1088 | if (_replaced_nodes_for_exceptions) { |
| 1089 | kit.map()->apply_replaced_nodes(_new_idx); |
| 1090 | } |
| 1091 | // Done with exception-path processing. |
| 1092 | ex_map = kit.make_exception_state(ex_oop); |
| 1093 | assert(ex_jvms->same_calls_as(ex_map->jvms()), "sanity")do { if (!(ex_jvms->same_calls_as(ex_map->jvms()))) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1093, "assert(" "ex_jvms->same_calls_as(ex_map->jvms())" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 1094 | // Pop the last vestige of this method: |
| 1095 | caller->clone_shallow(C)->bind_map(ex_map); |
| 1096 | _exits.push_exception_state(ex_map); |
| 1097 | } |
| 1098 | assert(_exits.map() == normal_map, "keep the same return state")do { if (!(_exits.map() == normal_map)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1098, "assert(" "_exits.map() == normal_map" ") failed", "keep the same return state" ); ::breakpoint(); } } while (0); |
| 1099 | } |
| 1100 | |
| 1101 | { |
| 1102 | // Capture very early exceptions (receiver null checks) from caller JVMS |
| 1103 | GraphKit caller(_caller); |
| 1104 | SafePointNode* ex_map; |
| 1105 | while ((ex_map = caller.pop_exception_state()) != NULL__null) { |
| 1106 | _exits.add_exception_state(ex_map); |
| 1107 | } |
| 1108 | } |
| 1109 | _exits.map()->apply_replaced_nodes(_new_idx); |
| 1110 | } |
| 1111 | |
| 1112 | //-----------------------------create_entry_map------------------------------- |
| 1113 | // Initialize our parser map to contain the types at method entry. |
| 1114 | // For OSR, the map contains a single RawPtr parameter. |
| 1115 | // Initial monitor locking for sync. methods is performed by do_method_entry. |
| 1116 | SafePointNode* Parse::create_entry_map() { |
| 1117 | // Check for really stupid bail-out cases. |
| 1118 | uint len = TypeFunc::Parms + method()->max_locals() + method()->max_stack(); |
| 1119 | if (len >= 32760) { |
| 1120 | C->record_method_not_compilable("too many local variables"); |
| 1121 | return NULL__null; |
| 1122 | } |
| 1123 | |
| 1124 | // clear current replaced nodes that are of no use from here on (map was cloned in build_exits). |
| 1125 | _caller->map()->delete_replaced_nodes(); |
| 1126 | |
| 1127 | // If this is an inlined method, we may have to do a receiver null check. |
| 1128 | if (_caller->has_method() && is_normal_parse() && !method()->is_static()) { |
| 1129 | GraphKit kit(_caller); |
| 1130 | kit.null_check_receiver_before_call(method()); |
| 1131 | _caller = kit.transfer_exceptions_into_jvms(); |
| 1132 | if (kit.stopped()) { |
| 1133 | _exits.add_exception_states_from(_caller); |
| 1134 | _exits.set_jvms(_caller); |
| 1135 | return NULL__null; |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | assert(method() != NULL, "parser must have a method")do { if (!(method() != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1139, "assert(" "method() != __null" ") failed", "parser must have a method" ); ::breakpoint(); } } while (0); |
| 1140 | |
| 1141 | // Create an initial safepoint to hold JVM state during parsing |
| 1142 | JVMState* jvms = new (C) JVMState(method(), _caller->has_method() ? _caller : NULL__null); |
| 1143 | set_map(new SafePointNode(len, jvms)); |
| 1144 | jvms->set_map(map()); |
| 1145 | record_for_igvn(map()); |
| 1146 | assert(jvms->endoff() == len, "correct jvms sizing")do { if (!(jvms->endoff() == len)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1146, "assert(" "jvms->endoff() == len" ") failed", "correct jvms sizing" ); ::breakpoint(); } } while (0); |
| 1147 | |
| 1148 | SafePointNode* inmap = _caller->map(); |
| 1149 | assert(inmap != NULL, "must have inmap")do { if (!(inmap != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1149, "assert(" "inmap != __null" ") failed", "must have inmap" ); ::breakpoint(); } } while (0); |
| 1150 | // In case of null check on receiver above |
| 1151 | map()->transfer_replaced_nodes_from(inmap, _new_idx); |
| 1152 | |
| 1153 | uint i; |
| 1154 | |
| 1155 | // Pass thru the predefined input parameters. |
| 1156 | for (i = 0; i < TypeFunc::Parms; i++) { |
| 1157 | map()->init_req(i, inmap->in(i)); |
| 1158 | } |
| 1159 | |
| 1160 | if (depth() == 1) { |
| 1161 | assert(map()->memory()->Opcode() == Op_Parm, "")do { if (!(map()->memory()->Opcode() == Op_Parm)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1161, "assert(" "map()->memory()->Opcode() == Op_Parm" ") failed", ""); ::breakpoint(); } } while (0); |
| 1162 | // Insert the memory aliasing node |
| 1163 | set_all_memory(reset_memory()); |
| 1164 | } |
| 1165 | assert(merged_memory(), "")do { if (!(merged_memory())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1165, "assert(" "merged_memory()" ") failed", ""); ::breakpoint (); } } while (0); |
| 1166 | |
| 1167 | // Now add the locals which are initially bound to arguments: |
| 1168 | uint arg_size = tf()->domain()->cnt(); |
| 1169 | ensure_stack(arg_size - TypeFunc::Parms); // OSR methods have funny args |
| 1170 | for (i = TypeFunc::Parms; i < arg_size; i++) { |
| 1171 | map()->init_req(i, inmap->argument(_caller, i - TypeFunc::Parms)); |
| 1172 | } |
| 1173 | |
| 1174 | // Clear out the rest of the map (locals and stack) |
| 1175 | for (i = arg_size; i < len; i++) { |
| 1176 | map()->init_req(i, top()); |
| 1177 | } |
| 1178 | |
| 1179 | SafePointNode* entry_map = stop(); |
| 1180 | return entry_map; |
| 1181 | } |
| 1182 | |
| 1183 | //-----------------------------do_method_entry-------------------------------- |
| 1184 | // Emit any code needed in the pseudo-block before BCI zero. |
| 1185 | // The main thing to do is lock the receiver of a synchronized method. |
| 1186 | void Parse::do_method_entry() { |
| 1187 | set_parse_bci(InvocationEntryBci); // Pseudo-BCP |
| 1188 | set_sp(0); // Java Stack Pointer |
| 1189 | |
| 1190 | NOT_PRODUCT( count_compiled_calls(true/*at_method_entry*/, false/*is_inline*/); )count_compiled_calls(true , false ); |
| 1191 | |
| 1192 | if (C->env()->dtrace_method_probes()) { |
| 1193 | make_dtrace_method_entry(method()); |
| 1194 | } |
| 1195 | |
| 1196 | #ifdef ASSERT1 |
| 1197 | // Narrow receiver type when it is too broad for the method being parsed. |
| 1198 | if (!method()->is_static()) { |
| 1199 | ciInstanceKlass* callee_holder = method()->holder(); |
| 1200 | const Type* holder_type = TypeInstPtr::make(TypePtr::BotPTR, callee_holder); |
| 1201 | |
| 1202 | Node* receiver_obj = local(0); |
| 1203 | const TypeInstPtr* receiver_type = _gvn.type(receiver_obj)->isa_instptr(); |
| 1204 | |
| 1205 | if (receiver_type != NULL__null && !receiver_type->higher_equal(holder_type)) { |
| 1206 | // Receiver should always be a subtype of callee holder. |
| 1207 | // But, since C2 type system doesn't properly track interfaces, |
| 1208 | // the invariant can't be expressed in the type system for default methods. |
| 1209 | // Example: for unrelated C <: I and D <: I, (C `meet` D) = Object </: I. |
| 1210 | assert(callee_holder->is_interface(), "missing subtype check")do { if (!(callee_holder->is_interface())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1210, "assert(" "callee_holder->is_interface()" ") failed" , "missing subtype check"); ::breakpoint(); } } while (0); |
| 1211 | |
| 1212 | // Perform dynamic receiver subtype check against callee holder class w/ a halt on failure. |
| 1213 | Node* holder_klass = _gvn.makecon(TypeKlassPtr::make(callee_holder)); |
| 1214 | Node* not_subtype_ctrl = gen_subtype_check(receiver_obj, holder_klass); |
| 1215 | assert(!stopped(), "not a subtype")do { if (!(!stopped())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1215, "assert(" "!stopped()" ") failed", "not a subtype"); :: breakpoint(); } } while (0); |
| 1216 | |
| 1217 | Node* halt = _gvn.transform(new HaltNode(not_subtype_ctrl, frameptr(), "failed receiver subtype check")); |
| 1218 | C->root()->add_req(halt); |
| 1219 | } |
| 1220 | } |
| 1221 | #endif // ASSERT |
| 1222 | |
| 1223 | // If the method is synchronized, we need to construct a lock node, attach |
| 1224 | // it to the Start node, and pin it there. |
| 1225 | if (method()->is_synchronized()) { |
| 1226 | // Insert a FastLockNode right after the Start which takes as arguments |
| 1227 | // the current thread pointer, the "this" pointer & the address of the |
| 1228 | // stack slot pair used for the lock. The "this" pointer is a projection |
| 1229 | // off the start node, but the locking spot has to be constructed by |
| 1230 | // creating a ConLNode of 0, and boxing it with a BoxLockNode. The BoxLockNode |
| 1231 | // becomes the second argument to the FastLockNode call. The |
| 1232 | // FastLockNode becomes the new control parent to pin it to the start. |
| 1233 | |
| 1234 | // Setup Object Pointer |
| 1235 | Node *lock_obj = NULL__null; |
| 1236 | if (method()->is_static()) { |
| 1237 | ciInstance* mirror = _method->holder()->java_mirror(); |
| 1238 | const TypeInstPtr *t_lock = TypeInstPtr::make(mirror); |
| 1239 | lock_obj = makecon(t_lock); |
| 1240 | } else { // Else pass the "this" pointer, |
| 1241 | lock_obj = local(0); // which is Parm0 from StartNode |
| 1242 | } |
| 1243 | // Clear out dead values from the debug info. |
| 1244 | kill_dead_locals(); |
| 1245 | // Build the FastLockNode |
| 1246 | _synch_lock = shared_lock(lock_obj); |
| 1247 | } |
| 1248 | |
| 1249 | // Feed profiling data for parameters to the type system so it can |
| 1250 | // propagate it as speculative types |
| 1251 | record_profiled_parameters_for_speculation(); |
| 1252 | } |
| 1253 | |
| 1254 | //------------------------------init_blocks------------------------------------ |
| 1255 | // Initialize our parser map to contain the types/monitors at method entry. |
| 1256 | void Parse::init_blocks() { |
| 1257 | // Create the blocks. |
| 1258 | _block_count = flow()->block_count(); |
| 1259 | _blocks = NEW_RESOURCE_ARRAY(Block, _block_count)(Block*) resource_allocate_bytes((_block_count) * sizeof(Block )); |
| 1260 | |
| 1261 | // Initialize the structs. |
| 1262 | for (int rpo = 0; rpo < block_count(); rpo++) { |
| 1263 | Block* block = rpo_at(rpo); |
| 1264 | new(block) Block(this, rpo); |
| 1265 | } |
| 1266 | |
| 1267 | // Collect predecessor and successor information. |
| 1268 | for (int rpo = 0; rpo < block_count(); rpo++) { |
| 1269 | Block* block = rpo_at(rpo); |
| 1270 | block->init_graph(this); |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | //-------------------------------init_node------------------------------------- |
| 1275 | Parse::Block::Block(Parse* outer, int rpo) : _live_locals() { |
| 1276 | _flow = outer->flow()->rpo_at(rpo); |
| 1277 | _pred_count = 0; |
| 1278 | _preds_parsed = 0; |
| 1279 | _count = 0; |
| 1280 | _is_parsed = false; |
| 1281 | _is_handler = false; |
| 1282 | _has_merged_backedge = false; |
| 1283 | _start_map = NULL__null; |
| 1284 | _has_predicates = false; |
| 1285 | _num_successors = 0; |
| 1286 | _all_successors = 0; |
| 1287 | _successors = NULL__null; |
| 1288 | assert(pred_count() == 0 && preds_parsed() == 0, "sanity")do { if (!(pred_count() == 0 && preds_parsed() == 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1288, "assert(" "pred_count() == 0 && preds_parsed() == 0" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 1289 | assert(!(is_merged() || is_parsed() || is_handler() || has_merged_backedge()), "sanity")do { if (!(!(is_merged() || is_parsed() || is_handler() || has_merged_backedge ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1289, "assert(" "!(is_merged() || is_parsed() || is_handler() || has_merged_backedge())" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 1290 | assert(_live_locals.size() == 0, "sanity")do { if (!(_live_locals.size() == 0)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1290, "assert(" "_live_locals.size() == 0" ") failed", "sanity" ); ::breakpoint(); } } while (0); |
| 1291 | |
| 1292 | // entry point has additional predecessor |
| 1293 | if (flow()->is_start()) _pred_count++; |
| 1294 | assert(flow()->is_start() == (this == outer->start_block()), "")do { if (!(flow()->is_start() == (this == outer->start_block ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1294, "assert(" "flow()->is_start() == (this == outer->start_block())" ") failed", ""); ::breakpoint(); } } while (0); |
| 1295 | } |
| 1296 | |
| 1297 | //-------------------------------init_graph------------------------------------ |
| 1298 | void Parse::Block::init_graph(Parse* outer) { |
| 1299 | // Create the successor list for this parser block. |
| 1300 | GrowableArray<ciTypeFlow::Block*>* tfs = flow()->successors(); |
| 1301 | GrowableArray<ciTypeFlow::Block*>* tfe = flow()->exceptions(); |
| 1302 | int ns = tfs->length(); |
| 1303 | int ne = tfe->length(); |
| 1304 | _num_successors = ns; |
| 1305 | _all_successors = ns+ne; |
| 1306 | _successors = (ns+ne == 0) ? NULL__null : NEW_RESOURCE_ARRAY(Block*, ns+ne)(Block**) resource_allocate_bytes((ns+ne) * sizeof(Block*)); |
| 1307 | int p = 0; |
| 1308 | for (int i = 0; i < ns+ne; i++) { |
| 1309 | ciTypeFlow::Block* tf2 = (i < ns) ? tfs->at(i) : tfe->at(i-ns); |
| 1310 | Block* block2 = outer->rpo_at(tf2->rpo()); |
| 1311 | _successors[i] = block2; |
| 1312 | |
| 1313 | // Accumulate pred info for the other block, too. |
| 1314 | // Note: We also need to set _pred_count for exception blocks since they could |
| 1315 | // also have normal predecessors (reached without athrow by an explicit jump). |
| 1316 | // This also means that next_path_num can be called along exception paths. |
| 1317 | block2->_pred_count++; |
| 1318 | if (i >= ns) { |
| 1319 | block2->_is_handler = true; |
| 1320 | } |
| 1321 | |
| 1322 | #ifdef ASSERT1 |
| 1323 | // A block's successors must be distinguishable by BCI. |
| 1324 | // That is, no bytecode is allowed to branch to two different |
| 1325 | // clones of the same code location. |
| 1326 | for (int j = 0; j < i; j++) { |
| 1327 | Block* block1 = _successors[j]; |
| 1328 | if (block1 == block2) continue; // duplicates are OK |
| 1329 | assert(block1->start() != block2->start(), "successors have unique bcis")do { if (!(block1->start() != block2->start())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1329, "assert(" "block1->start() != block2->start()" ") failed" , "successors have unique bcis"); ::breakpoint(); } } while ( 0); |
| 1330 | } |
| 1331 | #endif |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | //---------------------------successor_for_bci--------------------------------- |
| 1336 | Parse::Block* Parse::Block::successor_for_bci(int bci) { |
| 1337 | for (int i = 0; i < all_successors(); i++) { |
| 1338 | Block* block2 = successor_at(i); |
| 1339 | if (block2->start() == bci) return block2; |
| 1340 | } |
| 1341 | // We can actually reach here if ciTypeFlow traps out a block |
| 1342 | // due to an unloaded class, and concurrently with compilation the |
| 1343 | // class is then loaded, so that a later phase of the parser is |
| 1344 | // able to see more of the bytecode CFG. Or, the flow pass and |
| 1345 | // the parser can have a minor difference of opinion about executability |
| 1346 | // of bytecodes. For example, "obj.field = null" is executable even |
| 1347 | // if the field's type is an unloaded class; the flow pass used to |
| 1348 | // make a trap for such code. |
| 1349 | return NULL__null; |
| 1350 | } |
| 1351 | |
| 1352 | |
| 1353 | //-----------------------------stack_type_at----------------------------------- |
| 1354 | const Type* Parse::Block::stack_type_at(int i) const { |
| 1355 | return get_type(flow()->stack_type_at(i)); |
| 1356 | } |
| 1357 | |
| 1358 | |
| 1359 | //-----------------------------local_type_at----------------------------------- |
| 1360 | const Type* Parse::Block::local_type_at(int i) const { |
| 1361 | // Make dead locals fall to bottom. |
| 1362 | if (_live_locals.size() == 0) { |
| 1363 | MethodLivenessResult live_locals = flow()->outer()->method()->liveness_at_bci(start()); |
| 1364 | // This bitmap can be zero length if we saw a breakpoint. |
| 1365 | // In such cases, pretend they are all live. |
| 1366 | ((Block*)this)->_live_locals = live_locals; |
| 1367 | } |
| 1368 | if (_live_locals.size() > 0 && !_live_locals.at(i)) |
| 1369 | return Type::BOTTOM; |
| 1370 | |
| 1371 | return get_type(flow()->local_type_at(i)); |
| 1372 | } |
| 1373 | |
| 1374 | |
| 1375 | #ifndef PRODUCT |
| 1376 | |
| 1377 | //----------------------------name_for_bc-------------------------------------- |
| 1378 | // helper method for BytecodeParseHistogram |
| 1379 | static const char* name_for_bc(int i) { |
| 1380 | return Bytecodes::is_defined(i) ? Bytecodes::name(Bytecodes::cast(i)) : "xxxunusedxxx"; |
| 1381 | } |
| 1382 | |
| 1383 | //----------------------------BytecodeParseHistogram------------------------------------ |
| 1384 | Parse::BytecodeParseHistogram::BytecodeParseHistogram(Parse *p, Compile *c) { |
| 1385 | _parser = p; |
| 1386 | _compiler = c; |
| 1387 | if( ! _initialized ) { _initialized = true; reset(); } |
| 1388 | } |
| 1389 | |
| 1390 | //----------------------------current_count------------------------------------ |
| 1391 | int Parse::BytecodeParseHistogram::current_count(BPHType bph_type) { |
| 1392 | switch( bph_type ) { |
| 1393 | case BPH_transforms: { return _parser->gvn().made_progress(); } |
| 1394 | case BPH_values: { return _parser->gvn().made_new_values(); } |
| 1395 | default: { ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1395); ::breakpoint(); } while (0); return 0; } |
| 1396 | } |
| 1397 | } |
| 1398 | |
| 1399 | //----------------------------initialized-------------------------------------- |
| 1400 | bool Parse::BytecodeParseHistogram::initialized() { return _initialized; } |
| 1401 | |
| 1402 | //----------------------------reset-------------------------------------------- |
| 1403 | void Parse::BytecodeParseHistogram::reset() { |
| 1404 | int i = Bytecodes::number_of_codes; |
| 1405 | while (i-- > 0) { _bytecodes_parsed[i] = 0; _nodes_constructed[i] = 0; _nodes_transformed[i] = 0; _new_values[i] = 0; } |
| 1406 | } |
| 1407 | |
| 1408 | //----------------------------set_initial_state-------------------------------- |
| 1409 | // Record info when starting to parse one bytecode |
| 1410 | void Parse::BytecodeParseHistogram::set_initial_state( Bytecodes::Code bc ) { |
| 1411 | if( PrintParseStatistics && !_parser->is_osr_parse() ) { |
| 1412 | _initial_bytecode = bc; |
| 1413 | _initial_node_count = _compiler->unique(); |
| 1414 | _initial_transforms = current_count(BPH_transforms); |
| 1415 | _initial_values = current_count(BPH_values); |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | //----------------------------record_change-------------------------------- |
| 1420 | // Record results of parsing one bytecode |
| 1421 | void Parse::BytecodeParseHistogram::record_change() { |
| 1422 | if( PrintParseStatistics && !_parser->is_osr_parse() ) { |
| 1423 | ++_bytecodes_parsed[_initial_bytecode]; |
| 1424 | _nodes_constructed [_initial_bytecode] += (_compiler->unique() - _initial_node_count); |
| 1425 | _nodes_transformed [_initial_bytecode] += (current_count(BPH_transforms) - _initial_transforms); |
| 1426 | _new_values [_initial_bytecode] += (current_count(BPH_values) - _initial_values); |
| 1427 | } |
| 1428 | } |
| 1429 | |
| 1430 | |
| 1431 | //----------------------------print-------------------------------------------- |
| 1432 | void Parse::BytecodeParseHistogram::print(float cutoff) { |
| 1433 | ResourceMark rm; |
| 1434 | // print profile |
| 1435 | int total = 0; |
| 1436 | int i = 0; |
| 1437 | for( i = 0; i < Bytecodes::number_of_codes; ++i ) { total += _bytecodes_parsed[i]; } |
| 1438 | int abs_sum = 0; |
| 1439 | tty->cr(); //0123456789012345678901234567890123456789012345678901234567890123456789 |
| 1440 | tty->print_cr("Histogram of %d parsed bytecodes:", total); |
| 1441 | if( total == 0 ) { return; } |
| 1442 | tty->cr(); |
| 1443 | tty->print_cr("absolute: count of compiled bytecodes of this type"); |
| 1444 | tty->print_cr("relative: percentage contribution to compiled nodes"); |
| 1445 | tty->print_cr("nodes : Average number of nodes constructed per bytecode"); |
| 1446 | tty->print_cr("rnodes : Significance towards total nodes constructed, (nodes*relative)"); |
| 1447 | tty->print_cr("transforms: Average amount of tranform progress per bytecode compiled"); |
| 1448 | tty->print_cr("values : Average number of node values improved per bytecode"); |
| 1449 | tty->print_cr("name : Bytecode name"); |
| 1450 | tty->cr(); |
| 1451 | tty->print_cr(" absolute relative nodes rnodes transforms values name"); |
| 1452 | tty->print_cr("----------------------------------------------------------------------"); |
| 1453 | while (--i > 0) { |
| 1454 | int abs = _bytecodes_parsed[i]; |
| 1455 | float rel = abs * 100.0F / total; |
| 1456 | float nodes = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _nodes_constructed[i])/_bytecodes_parsed[i]; |
| 1457 | float rnodes = _bytecodes_parsed[i] == 0 ? 0 : rel * nodes; |
| 1458 | float xforms = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _nodes_transformed[i])/_bytecodes_parsed[i]; |
| 1459 | float values = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _new_values [i])/_bytecodes_parsed[i]; |
| 1460 | if (cutoff <= rel) { |
| 1461 | tty->print_cr("%10d %7.2f%% %6.1f %6.2f %6.1f %6.1f %s", abs, rel, nodes, rnodes, xforms, values, name_for_bc(i)); |
| 1462 | abs_sum += abs; |
| 1463 | } |
| 1464 | } |
| 1465 | tty->print_cr("----------------------------------------------------------------------"); |
| 1466 | float rel_sum = abs_sum * 100.0F / total; |
| 1467 | tty->print_cr("%10d %7.2f%% (cutoff = %.2f%%)", abs_sum, rel_sum, cutoff); |
| 1468 | tty->print_cr("----------------------------------------------------------------------"); |
| 1469 | tty->cr(); |
| 1470 | } |
| 1471 | #endif |
| 1472 | |
| 1473 | //----------------------------load_state_from---------------------------------- |
| 1474 | // Load block/map/sp. But not do not touch iter/bci. |
| 1475 | void Parse::load_state_from(Block* block) { |
| 1476 | set_block(block); |
| 1477 | // load the block's JVM state: |
| 1478 | set_map(block->start_map()); |
| 1479 | set_sp( block->start_sp()); |
| 1480 | } |
| 1481 | |
| 1482 | |
| 1483 | //-----------------------------record_state------------------------------------ |
| 1484 | void Parse::Block::record_state(Parse* p) { |
| 1485 | assert(!is_merged(), "can only record state once, on 1st inflow")do { if (!(!is_merged())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1485, "assert(" "!is_merged()" ") failed", "can only record state once, on 1st inflow" ); ::breakpoint(); } } while (0); |
| 1486 | assert(start_sp() == p->sp(), "stack pointer must agree with ciTypeFlow")do { if (!(start_sp() == p->sp())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1486, "assert(" "start_sp() == p->sp()" ") failed", "stack pointer must agree with ciTypeFlow" ); ::breakpoint(); } } while (0); |
| 1487 | set_start_map(p->stop()); |
| 1488 | } |
| 1489 | |
| 1490 | |
| 1491 | //------------------------------do_one_block----------------------------------- |
| 1492 | void Parse::do_one_block() { |
| 1493 | if (TraceOptoParse) { |
| 1494 | Block *b = block(); |
| 1495 | int ns = b->num_successors(); |
| 1496 | int nt = b->all_successors(); |
| 1497 | |
| 1498 | tty->print("Parsing block #%d at bci [%d,%d), successors: ", |
| 1499 | block()->rpo(), block()->start(), block()->limit()); |
| 1500 | for (int i = 0; i < nt; i++) { |
| 1501 | tty->print((( i < ns) ? " %d" : " %d(e)"), b->successor_at(i)->rpo()); |
| 1502 | } |
| 1503 | if (b->is_loop_head()) tty->print(" lphd"); |
| 1504 | tty->cr(); |
| 1505 | } |
| 1506 | |
| 1507 | assert(block()->is_merged(), "must be merged before being parsed")do { if (!(block()->is_merged())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1507, "assert(" "block()->is_merged()" ") failed", "must be merged before being parsed" ); ::breakpoint(); } } while (0); |
| 1508 | block()->mark_parsed(); |
| 1509 | |
| 1510 | // Set iterator to start of block. |
| 1511 | iter().reset_to_bci(block()->start()); |
| 1512 | |
| 1513 | CompileLog* log = C->log(); |
| 1514 | |
| 1515 | // Parse bytecodes |
| 1516 | while (!stopped() && !failing()) { |
| 1517 | iter().next(); |
| 1518 | |
| 1519 | // Learn the current bci from the iterator: |
| 1520 | set_parse_bci(iter().cur_bci()); |
| 1521 | |
| 1522 | if (bci() == block()->limit()) { |
| 1523 | // Do not walk into the next block until directed by do_all_blocks. |
| 1524 | merge(bci()); |
| 1525 | break; |
| 1526 | } |
| 1527 | assert(bci() < block()->limit(), "bci still in block")do { if (!(bci() < block()->limit())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1527, "assert(" "bci() < block()->limit()" ") failed" , "bci still in block"); ::breakpoint(); } } while (0); |
| 1528 | |
| 1529 | if (log != NULL__null) { |
| 1530 | // Output an optional context marker, to help place actions |
| 1531 | // that occur during parsing of this BC. If there is no log |
| 1532 | // output until the next context string, this context string |
| 1533 | // will be silently ignored. |
| 1534 | log->set_context("bc code='%d' bci='%d'", (int)bc(), bci()); |
| 1535 | } |
| 1536 | |
| 1537 | if (block()->has_trap_at(bci())) { |
| 1538 | // We must respect the flow pass's traps, because it will refuse |
| 1539 | // to produce successors for trapping blocks. |
| 1540 | int trap_index = block()->flow()->trap_index(); |
| 1541 | assert(trap_index != 0, "trap index must be valid")do { if (!(trap_index != 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1541, "assert(" "trap_index != 0" ") failed", "trap index must be valid" ); ::breakpoint(); } } while (0); |
| 1542 | uncommon_trap(trap_index); |
| 1543 | break; |
| 1544 | } |
| 1545 | |
| 1546 | NOT_PRODUCT( parse_histogram()->set_initial_state(bc()); )parse_histogram()->set_initial_state(bc());; |
| 1547 | |
| 1548 | #ifdef ASSERT1 |
| 1549 | int pre_bc_sp = sp(); |
| 1550 | int inputs, depth; |
| 1551 | bool have_se = !stopped() && compute_stack_effects(inputs, depth); |
| 1552 | assert(!have_se || pre_bc_sp >= inputs, "have enough stack to execute this BC: pre_bc_sp=%d, inputs=%d", pre_bc_sp, inputs)do { if (!(!have_se || pre_bc_sp >= inputs)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1552, "assert(" "!have_se || pre_bc_sp >= inputs" ") failed" , "have enough stack to execute this BC: pre_bc_sp=%d, inputs=%d" , pre_bc_sp, inputs); ::breakpoint(); } } while (0); |
| 1553 | #endif //ASSERT |
| 1554 | |
| 1555 | do_one_bytecode(); |
| 1556 | |
| 1557 | assert(!have_se || stopped() || failing() || (sp() - pre_bc_sp) == depth,do { if (!(!have_se || stopped() || failing() || (sp() - pre_bc_sp ) == depth)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1558, "assert(" "!have_se || stopped() || failing() || (sp() - pre_bc_sp) == depth" ") failed", "incorrect depth prediction: sp=%d, pre_bc_sp=%d, depth=%d" , sp(), pre_bc_sp, depth); ::breakpoint(); } } while (0) |
| 1558 | "incorrect depth prediction: sp=%d, pre_bc_sp=%d, depth=%d", sp(), pre_bc_sp, depth)do { if (!(!have_se || stopped() || failing() || (sp() - pre_bc_sp ) == depth)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1558, "assert(" "!have_se || stopped() || failing() || (sp() - pre_bc_sp) == depth" ") failed", "incorrect depth prediction: sp=%d, pre_bc_sp=%d, depth=%d" , sp(), pre_bc_sp, depth); ::breakpoint(); } } while (0); |
| 1559 | |
| 1560 | do_exceptions(); |
| 1561 | |
| 1562 | NOT_PRODUCT( parse_histogram()->record_change(); )parse_histogram()->record_change();; |
| 1563 | |
| 1564 | if (log != NULL__null) |
| 1565 | log->clear_context(); // skip marker if nothing was printed |
| 1566 | |
| 1567 | // Fall into next bytecode. Each bytecode normally has 1 sequential |
| 1568 | // successor which is typically made ready by visiting this bytecode. |
| 1569 | // If the successor has several predecessors, then it is a merge |
| 1570 | // point, starts a new basic block, and is handled like other basic blocks. |
| 1571 | } |
| 1572 | } |
| 1573 | |
| 1574 | |
| 1575 | //------------------------------merge------------------------------------------ |
| 1576 | void Parse::set_parse_bci(int bci) { |
| 1577 | set_bci(bci); |
| 1578 | Node_Notes* nn = C->default_node_notes(); |
| 1579 | if (nn == NULL__null) return; |
| 1580 | |
| 1581 | // Collect debug info for inlined calls unless -XX:-DebugInlinedCalls. |
| 1582 | if (!DebugInlinedCalls && depth() > 1) { |
| 1583 | return; |
| 1584 | } |
| 1585 | |
| 1586 | // Update the JVMS annotation, if present. |
| 1587 | JVMState* jvms = nn->jvms(); |
| 1588 | if (jvms != NULL__null && jvms->bci() != bci) { |
| 1589 | // Update the JVMS. |
| 1590 | jvms = jvms->clone_shallow(C); |
| 1591 | jvms->set_bci(bci); |
| 1592 | nn->set_jvms(jvms); |
| 1593 | } |
| 1594 | } |
| 1595 | |
| 1596 | //------------------------------merge------------------------------------------ |
| 1597 | // Merge the current mapping into the basic block starting at bci |
| 1598 | void Parse::merge(int target_bci) { |
| 1599 | Block* target = successor_for_bci(target_bci); |
| 1600 | if (target == NULL__null) { handle_missing_successor(target_bci); return; } |
| 1601 | assert(!target->is_ready(), "our arrival must be expected")do { if (!(!target->is_ready())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1601, "assert(" "!target->is_ready()" ") failed", "our arrival must be expected" ); ::breakpoint(); } } while (0); |
| 1602 | int pnum = target->next_path_num(); |
| 1603 | merge_common(target, pnum); |
| 1604 | } |
| 1605 | |
| 1606 | //-------------------------merge_new_path-------------------------------------- |
| 1607 | // Merge the current mapping into the basic block, using a new path |
| 1608 | void Parse::merge_new_path(int target_bci) { |
| 1609 | Block* target = successor_for_bci(target_bci); |
| 1610 | if (target == NULL__null) { handle_missing_successor(target_bci); return; } |
| 1611 | assert(!target->is_ready(), "new path into frozen graph")do { if (!(!target->is_ready())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1611, "assert(" "!target->is_ready()" ") failed", "new path into frozen graph" ); ::breakpoint(); } } while (0); |
| 1612 | int pnum = target->add_new_path(); |
| 1613 | merge_common(target, pnum); |
| 1614 | } |
| 1615 | |
| 1616 | //-------------------------merge_exception------------------------------------- |
| 1617 | // Merge the current mapping into the basic block starting at bci |
| 1618 | // The ex_oop must be pushed on the stack, unlike throw_to_exit. |
| 1619 | void Parse::merge_exception(int target_bci) { |
| 1620 | #ifdef ASSERT1 |
| 1621 | if (target_bci < bci()) { |
| 1622 | C->set_exception_backedge(); |
| 1623 | } |
| 1624 | #endif |
| 1625 | assert(sp() == 1, "must have only the throw exception on the stack")do { if (!(sp() == 1)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1625, "assert(" "sp() == 1" ") failed", "must have only the throw exception on the stack" ); ::breakpoint(); } } while (0); |
| 1626 | Block* target = successor_for_bci(target_bci); |
| 1627 | if (target == NULL__null) { handle_missing_successor(target_bci); return; } |
| 1628 | assert(target->is_handler(), "exceptions are handled by special blocks")do { if (!(target->is_handler())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1628, "assert(" "target->is_handler()" ") failed", "exceptions are handled by special blocks" ); ::breakpoint(); } } while (0); |
| 1629 | int pnum = target->add_new_path(); |
| 1630 | merge_common(target, pnum); |
| 1631 | } |
| 1632 | |
| 1633 | //--------------------handle_missing_successor--------------------------------- |
| 1634 | void Parse::handle_missing_successor(int target_bci) { |
| 1635 | #ifndef PRODUCT |
| 1636 | Block* b = block(); |
| 1637 | int trap_bci = b->flow()->has_trap()? b->flow()->trap_bci(): -1; |
| 1638 | tty->print_cr("### Missing successor at bci:%d for block #%d (trap_bci:%d)", target_bci, b->rpo(), trap_bci); |
| 1639 | #endif |
| 1640 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1640); ::breakpoint(); } while (0); |
| 1641 | } |
| 1642 | |
| 1643 | //--------------------------merge_common--------------------------------------- |
| 1644 | void Parse::merge_common(Parse::Block* target, int pnum) { |
| 1645 | if (TraceOptoParse) { |
| 1646 | tty->print("Merging state at block #%d bci:%d", target->rpo(), target->start()); |
| 1647 | } |
| 1648 | |
| 1649 | // Zap extra stack slots to top |
| 1650 | assert(sp() == target->start_sp(), "")do { if (!(sp() == target->start_sp())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1650, "assert(" "sp() == target->start_sp()" ") failed", ""); ::breakpoint(); } } while (0); |
| 1651 | clean_stack(sp()); |
| 1652 | |
| 1653 | if (!target->is_merged()) { // No prior mapping at this bci |
| 1654 | if (TraceOptoParse) { tty->print(" with empty state"); } |
| 1655 | |
| 1656 | // If this path is dead, do not bother capturing it as a merge. |
| 1657 | // It is "as if" we had 1 fewer predecessors from the beginning. |
| 1658 | if (stopped()) { |
| 1659 | if (TraceOptoParse) tty->print_cr(", but path is dead and doesn't count"); |
| 1660 | return; |
| 1661 | } |
| 1662 | |
| 1663 | // Make a region if we know there are multiple or unpredictable inputs. |
| 1664 | // (Also, if this is a plain fall-through, we might see another region, |
| 1665 | // which must not be allowed into this block's map.) |
| 1666 | if (pnum > PhiNode::Input // Known multiple inputs. |
| 1667 | || target->is_handler() // These have unpredictable inputs. |
| 1668 | || target->is_loop_head() // Known multiple inputs |
| 1669 | || control()->is_Region()) { // We must hide this guy. |
| 1670 | |
| 1671 | int current_bci = bci(); |
| 1672 | set_parse_bci(target->start()); // Set target bci |
| 1673 | if (target->is_SEL_head()) { |
| 1674 | DEBUG_ONLY( target->mark_merged_backedge(block()); )target->mark_merged_backedge(block()); |
| 1675 | if (target->start() == 0) { |
| 1676 | // Add loop predicate for the special case when |
| 1677 | // there are backbranches to the method entry. |
| 1678 | add_empty_predicates(); |
| 1679 | } |
| 1680 | } |
| 1681 | // Add a Region to start the new basic block. Phis will be added |
| 1682 | // later lazily. |
| 1683 | int edges = target->pred_count(); |
| 1684 | if (edges < pnum) edges = pnum; // might be a new path! |
| 1685 | RegionNode *r = new RegionNode(edges+1); |
| 1686 | gvn().set_type(r, Type::CONTROL); |
| 1687 | record_for_igvn(r); |
| 1688 | // zap all inputs to NULL for debugging (done in Node(uint) constructor) |
| 1689 | // for (int j = 1; j < edges+1; j++) { r->init_req(j, NULL); } |
| 1690 | r->init_req(pnum, control()); |
| 1691 | set_control(r); |
| 1692 | set_parse_bci(current_bci); // Restore bci |
| 1693 | } |
| 1694 | |
| 1695 | // Convert the existing Parser mapping into a mapping at this bci. |
| 1696 | store_state_to(target); |
| 1697 | assert(target->is_merged(), "do not come here twice")do { if (!(target->is_merged())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1697, "assert(" "target->is_merged()" ") failed", "do not come here twice" ); ::breakpoint(); } } while (0); |
| 1698 | |
| 1699 | } else { // Prior mapping at this bci |
| 1700 | if (TraceOptoParse) { tty->print(" with previous state"); } |
| 1701 | #ifdef ASSERT1 |
| 1702 | if (target->is_SEL_head()) { |
| 1703 | target->mark_merged_backedge(block()); |
| 1704 | } |
| 1705 | #endif |
| 1706 | // We must not manufacture more phis if the target is already parsed. |
| 1707 | bool nophi = target->is_parsed(); |
| 1708 | |
| 1709 | SafePointNode* newin = map();// Hang on to incoming mapping |
| 1710 | Block* save_block = block(); // Hang on to incoming block; |
| 1711 | load_state_from(target); // Get prior mapping |
| 1712 | |
| 1713 | assert(newin->jvms()->locoff() == jvms()->locoff(), "JVMS layouts agree")do { if (!(newin->jvms()->locoff() == jvms()->locoff ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1713, "assert(" "newin->jvms()->locoff() == jvms()->locoff()" ") failed", "JVMS layouts agree"); ::breakpoint(); } } while (0); |
| 1714 | assert(newin->jvms()->stkoff() == jvms()->stkoff(), "JVMS layouts agree")do { if (!(newin->jvms()->stkoff() == jvms()->stkoff ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1714, "assert(" "newin->jvms()->stkoff() == jvms()->stkoff()" ") failed", "JVMS layouts agree"); ::breakpoint(); } } while (0); |
| 1715 | assert(newin->jvms()->monoff() == jvms()->monoff(), "JVMS layouts agree")do { if (!(newin->jvms()->monoff() == jvms()->monoff ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1715, "assert(" "newin->jvms()->monoff() == jvms()->monoff()" ") failed", "JVMS layouts agree"); ::breakpoint(); } } while (0); |
| 1716 | assert(newin->jvms()->endoff() == jvms()->endoff(), "JVMS layouts agree")do { if (!(newin->jvms()->endoff() == jvms()->endoff ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1716, "assert(" "newin->jvms()->endoff() == jvms()->endoff()" ") failed", "JVMS layouts agree"); ::breakpoint(); } } while (0); |
| 1717 | |
| 1718 | // Iterate over my current mapping and the old mapping. |
| 1719 | // Where different, insert Phi functions. |
| 1720 | // Use any existing Phi functions. |
| 1721 | assert(control()->is_Region(), "must be merging to a region")do { if (!(control()->is_Region())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1721, "assert(" "control()->is_Region()" ") failed", "must be merging to a region" ); ::breakpoint(); } } while (0); |
| 1722 | RegionNode* r = control()->as_Region(); |
| 1723 | |
| 1724 | // Compute where to merge into |
| 1725 | // Merge incoming control path |
| 1726 | r->init_req(pnum, newin->control()); |
| 1727 | |
| 1728 | if (pnum == 1) { // Last merge for this Region? |
| 1729 | if (!block()->flow()->is_irreducible_entry()) { |
| 1730 | Node* result = _gvn.transform_no_reclaim(r); |
| 1731 | if (r != result && TraceOptoParse) { |
| 1732 | tty->print_cr("Block #%d replace %d with %d", block()->rpo(), r->_idx, result->_idx); |
| 1733 | } |
| 1734 | } |
| 1735 | record_for_igvn(r); |
| 1736 | } |
| 1737 | |
| 1738 | // Update all the non-control inputs to map: |
| 1739 | assert(TypeFunc::Parms == newin->jvms()->locoff(), "parser map should contain only youngest jvms")do { if (!(TypeFunc::Parms == newin->jvms()->locoff())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1739, "assert(" "TypeFunc::Parms == newin->jvms()->locoff()" ") failed", "parser map should contain only youngest jvms"); ::breakpoint(); } } while (0); |
| 1740 | bool check_elide_phi = target->is_SEL_backedge(save_block); |
| 1741 | for (uint j = 1; j < newin->req(); j++) { |
| 1742 | Node* m = map()->in(j); // Current state of target. |
| 1743 | Node* n = newin->in(j); // Incoming change to target state. |
| 1744 | PhiNode* phi; |
| 1745 | if (m->is_Phi() && m->as_Phi()->region() == r) |
| 1746 | phi = m->as_Phi(); |
| 1747 | else |
| 1748 | phi = NULL__null; |
| 1749 | if (m != n) { // Different; must merge |
| 1750 | switch (j) { |
| 1751 | // Frame pointer and Return Address never changes |
| 1752 | case TypeFunc::FramePtr:// Drop m, use the original value |
| 1753 | case TypeFunc::ReturnAdr: |
| 1754 | break; |
| 1755 | case TypeFunc::Memory: // Merge inputs to the MergeMem node |
| 1756 | assert(phi == NULL, "the merge contains phis, not vice versa")do { if (!(phi == __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1756, "assert(" "phi == __null" ") failed", "the merge contains phis, not vice versa" ); ::breakpoint(); } } while (0); |
| 1757 | merge_memory_edges(n->as_MergeMem(), pnum, nophi); |
| 1758 | continue; |
| 1759 | default: // All normal stuff |
| 1760 | if (phi == NULL__null) { |
| 1761 | const JVMState* jvms = map()->jvms(); |
| 1762 | if (EliminateNestedLocks && |
| 1763 | jvms->is_mon(j) && jvms->is_monitor_box(j)) { |
| 1764 | // BoxLock nodes are not commoning. |
| 1765 | // Use old BoxLock node as merged box. |
| 1766 | assert(newin->jvms()->is_monitor_box(j), "sanity")do { if (!(newin->jvms()->is_monitor_box(j))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1766, "assert(" "newin->jvms()->is_monitor_box(j)" ") failed" , "sanity"); ::breakpoint(); } } while (0); |
| 1767 | // This assert also tests that nodes are BoxLock. |
| 1768 | assert(BoxLockNode::same_slot(n, m), "sanity")do { if (!(BoxLockNode::same_slot(n, m))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1768, "assert(" "BoxLockNode::same_slot(n, m)" ") failed", "sanity" ); ::breakpoint(); } } while (0); |
| 1769 | C->gvn_replace_by(n, m); |
| 1770 | } else if (!check_elide_phi || !target->can_elide_SEL_phi(j)) { |
| 1771 | phi = ensure_phi(j, nophi); |
| 1772 | } |
| 1773 | } |
| 1774 | break; |
| 1775 | } |
| 1776 | } |
| 1777 | // At this point, n might be top if: |
| 1778 | // - there is no phi (because TypeFlow detected a conflict), or |
| 1779 | // - the corresponding control edges is top (a dead incoming path) |
| 1780 | // It is a bug if we create a phi which sees a garbage value on a live path. |
| 1781 | |
| 1782 | if (phi != NULL__null) { |
| 1783 | assert(n != top() || r->in(pnum) == top(), "live value must not be garbage")do { if (!(n != top() || r->in(pnum) == top())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1783, "assert(" "n != top() || r->in(pnum) == top()" ") failed" , "live value must not be garbage"); ::breakpoint(); } } while (0); |
| 1784 | assert(phi->region() == r, "")do { if (!(phi->region() == r)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1784, "assert(" "phi->region() == r" ") failed", ""); :: breakpoint(); } } while (0); |
| 1785 | phi->set_req(pnum, n); // Then add 'n' to the merge |
| 1786 | if (pnum == PhiNode::Input) { |
| 1787 | // Last merge for this Phi. |
| 1788 | // So far, Phis have had a reasonable type from ciTypeFlow. |
| 1789 | // Now _gvn will join that with the meet of current inputs. |
| 1790 | // BOTTOM is never permissible here, 'cause pessimistically |
| 1791 | // Phis of pointers cannot lose the basic pointer type. |
| 1792 | debug_only(const Type* bt1 = phi->bottom_type())const Type* bt1 = phi->bottom_type(); |
| 1793 | assert(bt1 != Type::BOTTOM, "should not be building conflict phis")do { if (!(bt1 != Type::BOTTOM)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1793, "assert(" "bt1 != Type::BOTTOM" ") failed", "should not be building conflict phis" ); ::breakpoint(); } } while (0); |
| 1794 | map()->set_req(j, _gvn.transform_no_reclaim(phi)); |
| 1795 | debug_only(const Type* bt2 = phi->bottom_type())const Type* bt2 = phi->bottom_type(); |
| 1796 | assert(bt2->higher_equal_speculative(bt1), "must be consistent with type-flow")do { if (!(bt2->higher_equal_speculative(bt1))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1796, "assert(" "bt2->higher_equal_speculative(bt1)" ") failed" , "must be consistent with type-flow"); ::breakpoint(); } } while (0); |
| 1797 | record_for_igvn(phi); |
| 1798 | } |
| 1799 | } |
| 1800 | } // End of for all values to be merged |
| 1801 | |
| 1802 | if (pnum == PhiNode::Input && |
| 1803 | !r->in(0)) { // The occasional useless Region |
| 1804 | assert(control() == r, "")do { if (!(control() == r)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1804, "assert(" "control() == r" ") failed", ""); ::breakpoint (); } } while (0); |
| 1805 | set_control(r->nonnull_req()); |
| 1806 | } |
| 1807 | |
| 1808 | map()->merge_replaced_nodes_with(newin); |
| 1809 | |
| 1810 | // newin has been subsumed into the lazy merge, and is now dead. |
| 1811 | set_block(save_block); |
| 1812 | |
| 1813 | stop(); // done with this guy, for now |
| 1814 | } |
| 1815 | |
| 1816 | if (TraceOptoParse) { |
| 1817 | tty->print_cr(" on path %d", pnum); |
| 1818 | } |
| 1819 | |
| 1820 | // Done with this parser state. |
| 1821 | assert(stopped(), "")do { if (!(stopped())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1821, "assert(" "stopped()" ") failed", ""); ::breakpoint() ; } } while (0); |
| 1822 | } |
| 1823 | |
| 1824 | |
| 1825 | //--------------------------merge_memory_edges--------------------------------- |
| 1826 | void Parse::merge_memory_edges(MergeMemNode* n, int pnum, bool nophi) { |
| 1827 | // (nophi means we must not create phis, because we already parsed here) |
| 1828 | assert(n != NULL, "")do { if (!(n != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1828, "assert(" "n != __null" ") failed", ""); ::breakpoint (); } } while (0); |
| 1829 | // Merge the inputs to the MergeMems |
| 1830 | MergeMemNode* m = merged_memory(); |
| 1831 | |
| 1832 | assert(control()->is_Region(), "must be merging to a region")do { if (!(control()->is_Region())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1832, "assert(" "control()->is_Region()" ") failed", "must be merging to a region" ); ::breakpoint(); } } while (0); |
| 1833 | RegionNode* r = control()->as_Region(); |
| 1834 | |
| 1835 | PhiNode* base = NULL__null; |
| 1836 | MergeMemNode* remerge = NULL__null; |
| 1837 | for (MergeMemStream mms(m, n); mms.next_non_empty2(); ) { |
| 1838 | Node *p = mms.force_memory(); |
| 1839 | Node *q = mms.memory2(); |
| 1840 | if (mms.is_empty() && nophi) { |
| 1841 | // Trouble: No new splits allowed after a loop body is parsed. |
| 1842 | // Instead, wire the new split into a MergeMem on the backedge. |
| 1843 | // The optimizer will sort it out, slicing the phi. |
| 1844 | if (remerge == NULL__null) { |
| 1845 | guarantee(base != NULL, "")do { if (!(base != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1845, "guarantee(" "base != NULL" ") failed", ""); ::breakpoint (); } } while (0); |
| 1846 | assert(base->in(0) != NULL, "should not be xformed away")do { if (!(base->in(0) != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1846, "assert(" "base->in(0) != __null" ") failed", "should not be xformed away" ); ::breakpoint(); } } while (0); |
| 1847 | remerge = MergeMemNode::make(base->in(pnum)); |
| 1848 | gvn().set_type(remerge, Type::MEMORY); |
| 1849 | base->set_req(pnum, remerge); |
| 1850 | } |
| 1851 | remerge->set_memory_at(mms.alias_idx(), q); |
| 1852 | continue; |
| 1853 | } |
| 1854 | assert(!q->is_MergeMem(), "")do { if (!(!q->is_MergeMem())) { (*g_assert_poison) = 'X'; ; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1854, "assert(" "!q->is_MergeMem()" ") failed", ""); ::breakpoint (); } } while (0); |
| 1855 | PhiNode* phi; |
| 1856 | if (p != q) { |
| 1857 | phi = ensure_memory_phi(mms.alias_idx(), nophi); |
| 1858 | } else { |
| 1859 | if (p->is_Phi() && p->as_Phi()->region() == r) |
| 1860 | phi = p->as_Phi(); |
| 1861 | else |
| 1862 | phi = NULL__null; |
| 1863 | } |
| 1864 | // Insert q into local phi |
| 1865 | if (phi != NULL__null) { |
| 1866 | assert(phi->region() == r, "")do { if (!(phi->region() == r)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1866, "assert(" "phi->region() == r" ") failed", ""); :: breakpoint(); } } while (0); |
| 1867 | p = phi; |
| 1868 | phi->set_req(pnum, q); |
| 1869 | if (mms.at_base_memory()) { |
| 1870 | base = phi; // delay transforming it |
| 1871 | } else if (pnum == 1) { |
| 1872 | record_for_igvn(phi); |
| 1873 | p = _gvn.transform_no_reclaim(phi); |
| 1874 | } |
| 1875 | mms.set_memory(p);// store back through the iterator |
| 1876 | } |
| 1877 | } |
| 1878 | // Transform base last, in case we must fiddle with remerging. |
| 1879 | if (base != NULL__null && pnum == 1) { |
| 1880 | record_for_igvn(base); |
| 1881 | m->set_base_memory( _gvn.transform_no_reclaim(base) ); |
| 1882 | } |
| 1883 | } |
| 1884 | |
| 1885 | |
| 1886 | //------------------------ensure_phis_everywhere------------------------------- |
| 1887 | void Parse::ensure_phis_everywhere() { |
| 1888 | ensure_phi(TypeFunc::I_O); |
| 1889 | |
| 1890 | // Ensure a phi on all currently known memories. |
| 1891 | for (MergeMemStream mms(merged_memory()); mms.next_non_empty(); ) { |
| 1892 | ensure_memory_phi(mms.alias_idx()); |
| 1893 | debug_only(mms.set_memory())mms.set_memory(); // keep the iterator happy |
| 1894 | } |
| 1895 | |
| 1896 | // Note: This is our only chance to create phis for memory slices. |
| 1897 | // If we miss a slice that crops up later, it will have to be |
| 1898 | // merged into the base-memory phi that we are building here. |
| 1899 | // Later, the optimizer will comb out the knot, and build separate |
| 1900 | // phi-loops for each memory slice that matters. |
| 1901 | |
| 1902 | // Monitors must nest nicely and not get confused amongst themselves. |
| 1903 | // Phi-ify everything up to the monitors, though. |
| 1904 | uint monoff = map()->jvms()->monoff(); |
| 1905 | uint nof_monitors = map()->jvms()->nof_monitors(); |
| 1906 | |
| 1907 | assert(TypeFunc::Parms == map()->jvms()->locoff(), "parser map should contain only youngest jvms")do { if (!(TypeFunc::Parms == map()->jvms()->locoff())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1907, "assert(" "TypeFunc::Parms == map()->jvms()->locoff()" ") failed", "parser map should contain only youngest jvms"); ::breakpoint(); } } while (0); |
| 1908 | bool check_elide_phi = block()->is_SEL_head(); |
| 1909 | for (uint i = TypeFunc::Parms; i < monoff; i++) { |
| 1910 | if (!check_elide_phi || !block()->can_elide_SEL_phi(i)) { |
| 1911 | ensure_phi(i); |
| 1912 | } |
| 1913 | } |
| 1914 | |
| 1915 | // Even monitors need Phis, though they are well-structured. |
| 1916 | // This is true for OSR methods, and also for the rare cases where |
| 1917 | // a monitor object is the subject of a replace_in_map operation. |
| 1918 | // See bugs 4426707 and 5043395. |
| 1919 | for (uint m = 0; m < nof_monitors; m++) { |
| 1920 | ensure_phi(map()->jvms()->monitor_obj_offset(m)); |
| 1921 | } |
| 1922 | } |
| 1923 | |
| 1924 | |
| 1925 | //-----------------------------add_new_path------------------------------------ |
| 1926 | // Add a previously unaccounted predecessor to this block. |
| 1927 | int Parse::Block::add_new_path() { |
| 1928 | // If there is no map, return the lowest unused path number. |
| 1929 | if (!is_merged()) return pred_count()+1; // there will be a map shortly |
| 1930 | |
| 1931 | SafePointNode* map = start_map(); |
| 1932 | if (!map->control()->is_Region()) |
| 1933 | return pred_count()+1; // there may be a region some day |
| 1934 | RegionNode* r = map->control()->as_Region(); |
| 1935 | |
| 1936 | // Add new path to the region. |
| 1937 | uint pnum = r->req(); |
| 1938 | r->add_req(NULL__null); |
| 1939 | |
| 1940 | for (uint i = 1; i < map->req(); i++) { |
| 1941 | Node* n = map->in(i); |
| 1942 | if (i == TypeFunc::Memory) { |
| 1943 | // Ensure a phi on all currently known memories. |
| 1944 | for (MergeMemStream mms(n->as_MergeMem()); mms.next_non_empty(); ) { |
| 1945 | Node* phi = mms.memory(); |
| 1946 | if (phi->is_Phi() && phi->as_Phi()->region() == r) { |
| 1947 | assert(phi->req() == pnum, "must be same size as region")do { if (!(phi->req() == pnum)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1947, "assert(" "phi->req() == pnum" ") failed", "must be same size as region" ); ::breakpoint(); } } while (0); |
| 1948 | phi->add_req(NULL__null); |
| 1949 | } |
| 1950 | } |
| 1951 | } else { |
| 1952 | if (n->is_Phi() && n->as_Phi()->region() == r) { |
| 1953 | assert(n->req() == pnum, "must be same size as region")do { if (!(n->req() == pnum)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1953, "assert(" "n->req() == pnum" ") failed", "must be same size as region" ); ::breakpoint(); } } while (0); |
| 1954 | n->add_req(NULL__null); |
| 1955 | } |
| 1956 | } |
| 1957 | } |
| 1958 | |
| 1959 | return pnum; |
| 1960 | } |
| 1961 | |
| 1962 | //------------------------------ensure_phi------------------------------------- |
| 1963 | // Turn the idx'th entry of the current map into a Phi |
| 1964 | PhiNode *Parse::ensure_phi(int idx, bool nocreate) { |
| 1965 | SafePointNode* map = this->map(); |
| 1966 | Node* region = map->control(); |
| 1967 | assert(region->is_Region(), "")do { if (!(region->is_Region())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1967, "assert(" "region->is_Region()" ") failed", ""); :: breakpoint(); } } while (0); |
| 1968 | |
| 1969 | Node* o = map->in(idx); |
| 1970 | assert(o != NULL, "")do { if (!(o != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1970, "assert(" "o != __null" ") failed", ""); ::breakpoint (); } } while (0); |
| 1971 | |
| 1972 | if (o == top()) return NULL__null; // TOP always merges into TOP |
| 1973 | |
| 1974 | if (o->is_Phi() && o->as_Phi()->region() == region) { |
| 1975 | return o->as_Phi(); |
| 1976 | } |
| 1977 | |
| 1978 | // Now use a Phi here for merging |
| 1979 | assert(!nocreate, "Cannot build a phi for a block already parsed.")do { if (!(!nocreate)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1979, "assert(" "!nocreate" ") failed", "Cannot build a phi for a block already parsed." ); ::breakpoint(); } } while (0); |
| 1980 | const JVMState* jvms = map->jvms(); |
| 1981 | const Type* t = NULL__null; |
| 1982 | if (jvms->is_loc(idx)) { |
| 1983 | t = block()->local_type_at(idx - jvms->locoff()); |
| 1984 | } else if (jvms->is_stk(idx)) { |
| 1985 | t = block()->stack_type_at(idx - jvms->stkoff()); |
| 1986 | } else if (jvms->is_mon(idx)) { |
| 1987 | assert(!jvms->is_monitor_box(idx), "no phis for boxes")do { if (!(!jvms->is_monitor_box(idx))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1987, "assert(" "!jvms->is_monitor_box(idx)" ") failed", "no phis for boxes"); ::breakpoint(); } } while (0); |
| 1988 | t = TypeInstPtr::BOTTOM; // this is sufficient for a lock object |
| 1989 | } else if ((uint)idx < TypeFunc::Parms) { |
| 1990 | t = o->bottom_type(); // Type::RETURN_ADDRESS or such-like. |
| 1991 | } else { |
| 1992 | assert(false, "no type information for this phi")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 1992, "assert(" "false" ") failed", "no type information for this phi" ); ::breakpoint(); } } while (0); |
| 1993 | } |
| 1994 | |
| 1995 | // If the type falls to bottom, then this must be a local that |
| 1996 | // is mixing ints and oops or some such. Forcing it to top |
| 1997 | // makes it go dead. |
| 1998 | if (t == Type::BOTTOM) { |
| 1999 | map->set_req(idx, top()); |
| 2000 | return NULL__null; |
| 2001 | } |
| 2002 | |
| 2003 | // Do not create phis for top either. |
| 2004 | // A top on a non-null control flow must be an unused even after the.phi. |
| 2005 | if (t == Type::TOP || t == Type::HALF) { |
| 2006 | map->set_req(idx, top()); |
| 2007 | return NULL__null; |
| 2008 | } |
| 2009 | |
| 2010 | PhiNode* phi = PhiNode::make(region, o, t); |
| 2011 | gvn().set_type(phi, t); |
| 2012 | if (C->do_escape_analysis()) record_for_igvn(phi); |
| 2013 | map->set_req(idx, phi); |
| 2014 | return phi; |
| 2015 | } |
| 2016 | |
| 2017 | //--------------------------ensure_memory_phi---------------------------------- |
| 2018 | // Turn the idx'th slice of the current memory into a Phi |
| 2019 | PhiNode *Parse::ensure_memory_phi(int idx, bool nocreate) { |
| 2020 | MergeMemNode* mem = merged_memory(); |
| 2021 | Node* region = control(); |
| 2022 | assert(region->is_Region(), "")do { if (!(region->is_Region())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2022, "assert(" "region->is_Region()" ") failed", ""); :: breakpoint(); } } while (0); |
| 2023 | |
| 2024 | Node *o = (idx == Compile::AliasIdxBot)? mem->base_memory(): mem->memory_at(idx); |
| 2025 | assert(o != NULL && o != top(), "")do { if (!(o != __null && o != top())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2025, "assert(" "o != __null && o != top()" ") failed" , ""); ::breakpoint(); } } while (0); |
| 2026 | |
| 2027 | PhiNode* phi; |
| 2028 | if (o->is_Phi() && o->as_Phi()->region() == region) { |
| 2029 | phi = o->as_Phi(); |
| 2030 | if (phi == mem->base_memory() && idx >= Compile::AliasIdxRaw) { |
| 2031 | // clone the shared base memory phi to make a new memory split |
| 2032 | assert(!nocreate, "Cannot build a phi for a block already parsed.")do { if (!(!nocreate)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2032, "assert(" "!nocreate" ") failed", "Cannot build a phi for a block already parsed." ); ::breakpoint(); } } while (0); |
| 2033 | const Type* t = phi->bottom_type(); |
| 2034 | const TypePtr* adr_type = C->get_adr_type(idx); |
| 2035 | phi = phi->slice_memory(adr_type); |
| 2036 | gvn().set_type(phi, t); |
| 2037 | } |
| 2038 | return phi; |
| 2039 | } |
| 2040 | |
| 2041 | // Now use a Phi here for merging |
| 2042 | assert(!nocreate, "Cannot build a phi for a block already parsed.")do { if (!(!nocreate)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2042, "assert(" "!nocreate" ") failed", "Cannot build a phi for a block already parsed." ); ::breakpoint(); } } while (0); |
| 2043 | const Type* t = o->bottom_type(); |
| 2044 | const TypePtr* adr_type = C->get_adr_type(idx); |
| 2045 | phi = PhiNode::make(region, o, t, adr_type); |
| 2046 | gvn().set_type(phi, t); |
| 2047 | if (idx == Compile::AliasIdxBot) |
| 2048 | mem->set_base_memory(phi); |
| 2049 | else |
| 2050 | mem->set_memory_at(idx, phi); |
| 2051 | return phi; |
| 2052 | } |
| 2053 | |
| 2054 | //------------------------------call_register_finalizer----------------------- |
| 2055 | // Check the klass of the receiver and call register_finalizer if the |
| 2056 | // class need finalization. |
| 2057 | void Parse::call_register_finalizer() { |
| 2058 | Node* receiver = local(0); |
| 2059 | assert(receiver != NULL && receiver->bottom_type()->isa_instptr() != NULL,do { if (!(receiver != __null && receiver->bottom_type ()->isa_instptr() != __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2060, "assert(" "receiver != __null && receiver->bottom_type()->isa_instptr() != __null" ") failed", "must have non-null instance type"); ::breakpoint (); } } while (0) |
| 2060 | "must have non-null instance type")do { if (!(receiver != __null && receiver->bottom_type ()->isa_instptr() != __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2060, "assert(" "receiver != __null && receiver->bottom_type()->isa_instptr() != __null" ") failed", "must have non-null instance type"); ::breakpoint (); } } while (0); |
| 2061 | |
| 2062 | const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr(); |
| 2063 | if (tinst != NULL__null && tinst->klass()->is_loaded() && !tinst->klass_is_exact()) { |
| 2064 | // The type isn't known exactly so see if CHA tells us anything. |
| 2065 | ciInstanceKlass* ik = tinst->klass()->as_instance_klass(); |
| 2066 | if (!Dependencies::has_finalizable_subclass(ik)) { |
| 2067 | // No finalizable subclasses so skip the dynamic check. |
| 2068 | C->dependencies()->assert_has_no_finalizable_subclasses(ik); |
| 2069 | return; |
| 2070 | } |
| 2071 | } |
| 2072 | |
| 2073 | // Insert a dynamic test for whether the instance needs |
| 2074 | // finalization. In general this will fold up since the concrete |
| 2075 | // class is often visible so the access flags are constant. |
| 2076 | Node* klass_addr = basic_plus_adr( receiver, receiver, oopDesc::klass_offset_in_bytes() ); |
| 2077 | Node* klass = _gvn.transform(LoadKlassNode::make(_gvn, NULL__null, immutable_memory(), klass_addr, TypeInstPtr::KLASS)); |
| 2078 | |
| 2079 | Node* access_flags_addr = basic_plus_adr(klass, klass, in_bytes(Klass::access_flags_offset())); |
| 2080 | Node* access_flags = make_load(NULL__null, access_flags_addr, TypeInt::INT, T_INT, MemNode::unordered); |
| 2081 | |
| 2082 | Node* mask = _gvn.transform(new AndINode(access_flags, intcon(JVM_ACC_HAS_FINALIZER))); |
| 2083 | Node* check = _gvn.transform(new CmpINode(mask, intcon(0))); |
| 2084 | Node* test = _gvn.transform(new BoolNode(check, BoolTest::ne)); |
| 2085 | |
| 2086 | IfNode* iff = create_and_map_if(control(), test, PROB_MAX(1.0f-(1e-6f)), COUNT_UNKNOWN(-1.0f)); |
| 2087 | |
| 2088 | RegionNode* result_rgn = new RegionNode(3); |
| 2089 | record_for_igvn(result_rgn); |
| 2090 | |
| 2091 | Node *skip_register = _gvn.transform(new IfFalseNode(iff)); |
| 2092 | result_rgn->init_req(1, skip_register); |
| 2093 | |
| 2094 | Node *needs_register = _gvn.transform(new IfTrueNode(iff)); |
| 2095 | set_control(needs_register); |
| 2096 | if (stopped()) { |
| 2097 | // There is no slow path. |
| 2098 | result_rgn->init_req(2, top()); |
| 2099 | } else { |
| 2100 | Node *call = make_runtime_call(RC_NO_LEAF, |
| 2101 | OptoRuntime::register_finalizer_Type(), |
| 2102 | OptoRuntime::register_finalizer_Java(), |
| 2103 | NULL__null, TypePtr::BOTTOM, |
| 2104 | receiver); |
| 2105 | make_slow_call_ex(call, env()->Throwable_klass(), true); |
| 2106 | |
| 2107 | Node* fast_io = call->in(TypeFunc::I_O); |
| 2108 | Node* fast_mem = call->in(TypeFunc::Memory); |
| 2109 | // These two phis are pre-filled with copies of of the fast IO and Memory |
| 2110 | Node* io_phi = PhiNode::make(result_rgn, fast_io, Type::ABIO); |
| 2111 | Node* mem_phi = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM); |
| 2112 | |
| 2113 | result_rgn->init_req(2, control()); |
| 2114 | io_phi ->init_req(2, i_o()); |
| 2115 | mem_phi ->init_req(2, reset_memory()); |
| 2116 | |
| 2117 | set_all_memory( _gvn.transform(mem_phi) ); |
| 2118 | set_i_o( _gvn.transform(io_phi) ); |
| 2119 | } |
| 2120 | |
| 2121 | set_control( _gvn.transform(result_rgn) ); |
| 2122 | } |
| 2123 | |
| 2124 | // Add check to deoptimize once holder klass is fully initialized. |
| 2125 | void Parse::clinit_deopt() { |
| 2126 | assert(C->has_method(), "only for normal compilations")do { if (!(C->has_method())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2126, "assert(" "C->has_method()" ") failed", "only for normal compilations" ); ::breakpoint(); } } while (0); |
| 2127 | assert(depth() == 1, "only for main compiled method")do { if (!(depth() == 1)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2127, "assert(" "depth() == 1" ") failed", "only for main compiled method" ); ::breakpoint(); } } while (0); |
| 2128 | assert(is_normal_parse(), "no barrier needed on osr entry")do { if (!(is_normal_parse())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2128, "assert(" "is_normal_parse()" ") failed", "no barrier needed on osr entry" ); ::breakpoint(); } } while (0); |
| 2129 | assert(!method()->holder()->is_not_initialized(), "initialization should have been started")do { if (!(!method()->holder()->is_not_initialized())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2129, "assert(" "!method()->holder()->is_not_initialized()" ") failed", "initialization should have been started"); ::breakpoint (); } } while (0); |
| 2130 | |
| 2131 | set_parse_bci(0); |
| 2132 | |
| 2133 | Node* holder = makecon(TypeKlassPtr::make(method()->holder())); |
| 2134 | guard_klass_being_initialized(holder); |
| 2135 | } |
| 2136 | |
| 2137 | // Add check to deoptimize if RTM state is not ProfileRTM |
| 2138 | void Parse::rtm_deopt() { |
| 2139 | #if INCLUDE_RTM_OPT1 |
| 2140 | if (C->profile_rtm()) { |
| 2141 | assert(C->has_method(), "only for normal compilations")do { if (!(C->has_method())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2141, "assert(" "C->has_method()" ") failed", "only for normal compilations" ); ::breakpoint(); } } while (0); |
| 2142 | assert(!C->method()->method_data()->is_empty(), "MDO is needed to record RTM state")do { if (!(!C->method()->method_data()->is_empty())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2142, "assert(" "!C->method()->method_data()->is_empty()" ") failed", "MDO is needed to record RTM state"); ::breakpoint (); } } while (0); |
| 2143 | assert(depth() == 1, "generate check only for main compiled method")do { if (!(depth() == 1)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2143, "assert(" "depth() == 1" ") failed", "generate check only for main compiled method" ); ::breakpoint(); } } while (0); |
| 2144 | |
| 2145 | // Set starting bci for uncommon trap. |
| 2146 | set_parse_bci(is_osr_parse() ? osr_bci() : 0); |
| 2147 | |
| 2148 | // Load the rtm_state from the MethodData. |
| 2149 | const TypePtr* adr_type = TypeMetadataPtr::make(C->method()->method_data()); |
| 2150 | Node* mdo = makecon(adr_type); |
| 2151 | int offset = MethodData::rtm_state_offset_in_bytes(); |
| 2152 | Node* adr_node = basic_plus_adr(mdo, mdo, offset); |
| 2153 | Node* rtm_state = make_load(control(), adr_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered); |
| 2154 | |
| 2155 | // Separate Load from Cmp by Opaque. |
| 2156 | // In expand_macro_nodes() it will be replaced either |
| 2157 | // with this load when there are locks in the code |
| 2158 | // or with ProfileRTM (cmp->in(2)) otherwise so that |
| 2159 | // the check will fold. |
| 2160 | Node* profile_state = makecon(TypeInt::make(ProfileRTM)); |
| 2161 | Node* opq = _gvn.transform( new Opaque3Node(C, rtm_state, Opaque3Node::RTM_OPT) ); |
| 2162 | Node* chk = _gvn.transform( new CmpINode(opq, profile_state) ); |
| 2163 | Node* tst = _gvn.transform( new BoolNode(chk, BoolTest::eq) ); |
| 2164 | // Branch to failure if state was changed |
| 2165 | { BuildCutout unless(this, tst, PROB_ALWAYS(1.0f-(1e-6f))); |
| 2166 | uncommon_trap(Deoptimization::Reason_rtm_state_change, |
| 2167 | Deoptimization::Action_make_not_entrant); |
| 2168 | } |
| 2169 | } |
| 2170 | #endif |
| 2171 | } |
| 2172 | |
| 2173 | void Parse::decrement_age() { |
| 2174 | MethodCounters* mc = method()->ensure_method_counters(); |
| 2175 | if (mc == NULL__null) { |
| 2176 | C->record_failure("Must have MCs"); |
| 2177 | return; |
| 2178 | } |
| 2179 | assert(!is_osr_parse(), "Not doing this for OSRs")do { if (!(!is_osr_parse())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2179, "assert(" "!is_osr_parse()" ") failed", "Not doing this for OSRs" ); ::breakpoint(); } } while (0); |
| 2180 | |
| 2181 | // Set starting bci for uncommon trap. |
| 2182 | set_parse_bci(0); |
| 2183 | |
| 2184 | const TypePtr* adr_type = TypeRawPtr::make((address)mc); |
| 2185 | Node* mc_adr = makecon(adr_type); |
| 2186 | Node* cnt_adr = basic_plus_adr(mc_adr, mc_adr, in_bytes(MethodCounters::nmethod_age_offset())); |
| 2187 | Node* cnt = make_load(control(), cnt_adr, TypeInt::INT, T_INT, adr_type, MemNode::unordered); |
| 2188 | Node* decr = _gvn.transform(new SubINode(cnt, makecon(TypeInt::ONE))); |
| 2189 | store_to_memory(control(), cnt_adr, decr, T_INT, adr_type, MemNode::unordered); |
| 2190 | Node *chk = _gvn.transform(new CmpINode(decr, makecon(TypeInt::ZERO))); |
| 2191 | Node* tst = _gvn.transform(new BoolNode(chk, BoolTest::gt)); |
| 2192 | { BuildCutout unless(this, tst, PROB_ALWAYS(1.0f-(1e-6f))); |
| 2193 | uncommon_trap(Deoptimization::Reason_tenured, |
| 2194 | Deoptimization::Action_make_not_entrant); |
| 2195 | } |
| 2196 | } |
| 2197 | |
| 2198 | //------------------------------return_current--------------------------------- |
| 2199 | // Append current _map to _exit_return |
| 2200 | void Parse::return_current(Node* value) { |
| 2201 | if (RegisterFinalizersAtInit && |
| 2202 | method()->intrinsic_id() == vmIntrinsics::_Object_init) { |
| 2203 | call_register_finalizer(); |
| 2204 | } |
| 2205 | |
| 2206 | // Do not set_parse_bci, so that return goo is credited to the return insn. |
| 2207 | set_bci(InvocationEntryBci); |
| 2208 | if (method()->is_synchronized() && GenerateSynchronizationCode) { |
| 2209 | shared_unlock(_synch_lock->box_node(), _synch_lock->obj_node()); |
| 2210 | } |
| 2211 | if (C->env()->dtrace_method_probes()) { |
| 2212 | make_dtrace_method_exit(method()); |
| 2213 | } |
| 2214 | SafePointNode* exit_return = _exits.map(); |
| 2215 | exit_return->in( TypeFunc::Control )->add_req( control() ); |
| 2216 | exit_return->in( TypeFunc::I_O )->add_req( i_o () ); |
| 2217 | Node *mem = exit_return->in( TypeFunc::Memory ); |
| 2218 | for (MergeMemStream mms(mem->as_MergeMem(), merged_memory()); mms.next_non_empty2(); ) { |
| 2219 | if (mms.is_empty()) { |
| 2220 | // get a copy of the base memory, and patch just this one input |
| 2221 | const TypePtr* adr_type = mms.adr_type(C); |
| 2222 | Node* phi = mms.force_memory()->as_Phi()->slice_memory(adr_type); |
| 2223 | assert(phi->as_Phi()->region() == mms.base_memory()->in(0), "")do { if (!(phi->as_Phi()->region() == mms.base_memory() ->in(0))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2223, "assert(" "phi->as_Phi()->region() == mms.base_memory()->in(0)" ") failed", ""); ::breakpoint(); } } while (0); |
| 2224 | gvn().set_type_bottom(phi); |
| 2225 | phi->del_req(phi->req()-1); // prepare to re-patch |
| 2226 | mms.set_memory(phi); |
| 2227 | } |
| 2228 | mms.memory()->add_req(mms.memory2()); |
| 2229 | } |
| 2230 | |
| 2231 | // frame pointer is always same, already captured |
| 2232 | if (value != NULL__null) { |
| 2233 | // If returning oops to an interface-return, there is a silent free |
| 2234 | // cast from oop to interface allowed by the Verifier. Make it explicit |
| 2235 | // here. |
| 2236 | Node* phi = _exits.argument(0); |
| 2237 | const TypeInstPtr *tr = phi->bottom_type()->isa_instptr(); |
| 2238 | if (tr && tr->klass()->is_loaded() && |
| 2239 | tr->klass()->is_interface()) { |
| 2240 | const TypeInstPtr *tp = value->bottom_type()->isa_instptr(); |
| 2241 | if (tp && tp->klass()->is_loaded() && |
| 2242 | !tp->klass()->is_interface()) { |
| 2243 | // sharpen the type eagerly; this eases certain assert checking |
| 2244 | if (tp->higher_equal(TypeInstPtr::NOTNULL)) |
| 2245 | tr = tr->join_speculative(TypeInstPtr::NOTNULL)->is_instptr(); |
| 2246 | value = _gvn.transform(new CheckCastPPNode(0, value, tr)); |
| 2247 | } |
| 2248 | } else { |
| 2249 | // Also handle returns of oop-arrays to an arrays-of-interface return |
| 2250 | const TypeInstPtr* phi_tip; |
| 2251 | const TypeInstPtr* val_tip; |
| 2252 | Type::get_arrays_base_elements(phi->bottom_type(), value->bottom_type(), &phi_tip, &val_tip); |
| 2253 | if (phi_tip != NULL__null && phi_tip->is_loaded() && phi_tip->klass()->is_interface() && |
| 2254 | val_tip != NULL__null && val_tip->is_loaded() && !val_tip->klass()->is_interface()) { |
| 2255 | value = _gvn.transform(new CheckCastPPNode(0, value, phi->bottom_type())); |
| 2256 | } |
| 2257 | } |
| 2258 | phi->add_req(value); |
| 2259 | } |
| 2260 | |
| 2261 | if (_first_return) { |
| 2262 | _exits.map()->transfer_replaced_nodes_from(map(), _new_idx); |
| 2263 | _first_return = false; |
| 2264 | } else { |
| 2265 | _exits.map()->merge_replaced_nodes_with(map()); |
| 2266 | } |
| 2267 | |
| 2268 | stop_and_kill_map(); // This CFG path dies here |
| 2269 | } |
| 2270 | |
| 2271 | |
| 2272 | //------------------------------add_safepoint---------------------------------- |
| 2273 | void Parse::add_safepoint() { |
| 2274 | uint parms = TypeFunc::Parms+1; |
| 2275 | |
| 2276 | // Clear out dead values from the debug info. |
| 2277 | kill_dead_locals(); |
| 2278 | |
| 2279 | // Clone the JVM State |
| 2280 | SafePointNode *sfpnt = new SafePointNode(parms, NULL__null); |
| 2281 | |
| 2282 | // Capture memory state BEFORE a SafePoint. Since we can block at a |
| 2283 | // SafePoint we need our GC state to be safe; i.e. we need all our current |
| 2284 | // write barriers (card marks) to not float down after the SafePoint so we |
| 2285 | // must read raw memory. Likewise we need all oop stores to match the card |
| 2286 | // marks. If deopt can happen, we need ALL stores (we need the correct JVM |
| 2287 | // state on a deopt). |
| 2288 | |
| 2289 | // We do not need to WRITE the memory state after a SafePoint. The control |
| 2290 | // edge will keep card-marks and oop-stores from floating up from below a |
| 2291 | // SafePoint and our true dependency added here will keep them from floating |
| 2292 | // down below a SafePoint. |
| 2293 | |
| 2294 | // Clone the current memory state |
| 2295 | Node* mem = MergeMemNode::make(map()->memory()); |
| 2296 | |
| 2297 | mem = _gvn.transform(mem); |
| 2298 | |
| 2299 | // Pass control through the safepoint |
| 2300 | sfpnt->init_req(TypeFunc::Control , control()); |
| 2301 | // Fix edges normally used by a call |
| 2302 | sfpnt->init_req(TypeFunc::I_O , top() ); |
| 2303 | sfpnt->init_req(TypeFunc::Memory , mem ); |
| 2304 | sfpnt->init_req(TypeFunc::ReturnAdr, top() ); |
| 2305 | sfpnt->init_req(TypeFunc::FramePtr , top() ); |
| 2306 | |
| 2307 | // Create a node for the polling address |
| 2308 | Node *polladr; |
| 2309 | Node *thread = _gvn.transform(new ThreadLocalNode()); |
| 2310 | Node *polling_page_load_addr = _gvn.transform(basic_plus_adr(top(), thread, in_bytes(JavaThread::polling_page_offset()))); |
| 2311 | polladr = make_load(control(), polling_page_load_addr, TypeRawPtr::BOTTOM, T_ADDRESS, Compile::AliasIdxRaw, MemNode::unordered); |
| 2312 | sfpnt->init_req(TypeFunc::Parms+0, _gvn.transform(polladr)); |
| 2313 | |
| 2314 | // Fix up the JVM State edges |
| 2315 | add_safepoint_edges(sfpnt); |
| 2316 | Node *transformed_sfpnt = _gvn.transform(sfpnt); |
| 2317 | set_control(transformed_sfpnt); |
| 2318 | |
| 2319 | // Provide an edge from root to safepoint. This makes the safepoint |
| 2320 | // appear useful until the parse has completed. |
| 2321 | if (transformed_sfpnt->is_SafePoint()) { |
| 2322 | assert(C->root() != NULL, "Expect parse is still valid")do { if (!(C->root() != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/opto/parse1.cpp" , 2322, "assert(" "C->root() != __null" ") failed", "Expect parse is still valid" ); ::breakpoint(); } } while (0); |
| 2323 | C->root()->add_prec(transformed_sfpnt); |
| 2324 | } |
| 2325 | } |
| 2326 | |
| 2327 | #ifndef PRODUCT |
| 2328 | //------------------------show_parse_info-------------------------------------- |
| 2329 | void Parse::show_parse_info() { |
| 2330 | InlineTree* ilt = NULL__null; |
| 2331 | if (C->ilt() != NULL__null) { |
| 2332 | JVMState* caller_jvms = is_osr_parse() ? caller()->caller() : caller(); |
| 2333 | ilt = InlineTree::find_subtree_from_root(C->ilt(), caller_jvms, method()); |
| 2334 | } |
| 2335 | if (PrintCompilation && Verbose) { |
| 2336 | if (depth() == 1) { |
| 2337 | if( ilt->count_inlines() ) { |
| 2338 | tty->print(" __inlined %d (%d bytes)", ilt->count_inlines(), |
| 2339 | ilt->count_inline_bcs()); |
| 2340 | tty->cr(); |
| 2341 | } |
| 2342 | } else { |
| 2343 | if (method()->is_synchronized()) tty->print("s"); |
| 2344 | if (method()->has_exception_handlers()) tty->print("!"); |
| 2345 | // Check this is not the final compiled version |
| 2346 | if (C->trap_can_recompile()) { |
| 2347 | tty->print("-"); |
| 2348 | } else { |
| 2349 | tty->print(" "); |
| 2350 | } |
| 2351 | method()->print_short_name(); |
| 2352 | if (is_osr_parse()) { |
| 2353 | tty->print(" @ %d", osr_bci()); |
| 2354 | } |
| 2355 | tty->print(" (%d bytes)",method()->code_size()); |
| 2356 | if (ilt->count_inlines()) { |
| 2357 | tty->print(" __inlined %d (%d bytes)", ilt->count_inlines(), |
| 2358 | ilt->count_inline_bcs()); |
| 2359 | } |
| 2360 | tty->cr(); |
| 2361 | } |
| 2362 | } |
| 2363 | if (PrintOpto && (depth() == 1 || PrintOptoInlining)) { |
| 2364 | // Print that we succeeded; suppress this message on the first osr parse. |
| 2365 | |
| 2366 | if (method()->is_synchronized()) tty->print("s"); |
| 2367 | if (method()->has_exception_handlers()) tty->print("!"); |
| 2368 | // Check this is not the final compiled version |
| 2369 | if (C->trap_can_recompile() && depth() == 1) { |
| 2370 | tty->print("-"); |
| 2371 | } else { |
| 2372 | tty->print(" "); |
| 2373 | } |
| 2374 | if( depth() != 1 ) { tty->print(" "); } // missing compile count |
| 2375 | for (int i = 1; i < depth(); ++i) { tty->print(" "); } |
| 2376 | method()->print_short_name(); |
| 2377 | if (is_osr_parse()) { |
| 2378 | tty->print(" @ %d", osr_bci()); |
| 2379 | } |
| 2380 | if (ilt->caller_bci() != -1) { |
| 2381 | tty->print(" @ %d", ilt->caller_bci()); |
| 2382 | } |
| 2383 | tty->print(" (%d bytes)",method()->code_size()); |
| 2384 | if (ilt->count_inlines()) { |
| 2385 | tty->print(" __inlined %d (%d bytes)", ilt->count_inlines(), |
| 2386 | ilt->count_inline_bcs()); |
| 2387 | } |
| 2388 | tty->cr(); |
| 2389 | } |
| 2390 | } |
| 2391 | |
| 2392 | |
| 2393 | //------------------------------dump------------------------------------------- |
| 2394 | // Dump information associated with the bytecodes of current _method |
| 2395 | void Parse::dump() { |
| 2396 | if( method() != NULL__null ) { |
| 2397 | // Iterate over bytecodes |
| 2398 | ciBytecodeStream iter(method()); |
| 2399 | for( Bytecodes::Code bc = iter.next(); bc != ciBytecodeStream::EOBC() ; bc = iter.next() ) { |
| 2400 | dump_bci( iter.cur_bci() ); |
| 2401 | tty->cr(); |
| 2402 | } |
| 2403 | } |
| 2404 | } |
| 2405 | |
| 2406 | // Dump information associated with a byte code index, 'bci' |
| 2407 | void Parse::dump_bci(int bci) { |
| 2408 | // Output info on merge-points, cloning, and within _jsr..._ret |
| 2409 | // NYI |
| 2410 | tty->print(" bci:%d", bci); |
| 2411 | } |
| 2412 | |
| 2413 | #endif |