Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "c1/c1_IR.hpp" |
aoqi@0 | 27 | #include "c1/c1_Instruction.hpp" |
aoqi@0 | 28 | #include "c1/c1_InstructionPrinter.hpp" |
aoqi@0 | 29 | #include "c1/c1_ValueStack.hpp" |
aoqi@0 | 30 | #include "ci/ciObjArrayKlass.hpp" |
aoqi@0 | 31 | #include "ci/ciTypeArrayKlass.hpp" |
aoqi@0 | 32 | |
aoqi@0 | 33 | |
aoqi@0 | 34 | // Implementation of Instruction |
aoqi@0 | 35 | |
aoqi@0 | 36 | |
aoqi@0 | 37 | int Instruction::dominator_depth() { |
aoqi@0 | 38 | int result = -1; |
aoqi@0 | 39 | if (block()) { |
aoqi@0 | 40 | result = block()->dominator_depth(); |
aoqi@0 | 41 | } |
aoqi@0 | 42 | assert(result != -1 || this->as_Local(), "Only locals have dominator depth -1"); |
aoqi@0 | 43 | return result; |
aoqi@0 | 44 | } |
aoqi@0 | 45 | |
aoqi@0 | 46 | Instruction::Condition Instruction::mirror(Condition cond) { |
aoqi@0 | 47 | switch (cond) { |
aoqi@0 | 48 | case eql: return eql; |
aoqi@0 | 49 | case neq: return neq; |
aoqi@0 | 50 | case lss: return gtr; |
aoqi@0 | 51 | case leq: return geq; |
aoqi@0 | 52 | case gtr: return lss; |
aoqi@0 | 53 | case geq: return leq; |
aoqi@0 | 54 | case aeq: return beq; |
aoqi@0 | 55 | case beq: return aeq; |
aoqi@0 | 56 | } |
aoqi@0 | 57 | ShouldNotReachHere(); |
aoqi@0 | 58 | return eql; |
aoqi@0 | 59 | } |
aoqi@0 | 60 | |
aoqi@0 | 61 | |
aoqi@0 | 62 | Instruction::Condition Instruction::negate(Condition cond) { |
aoqi@0 | 63 | switch (cond) { |
aoqi@0 | 64 | case eql: return neq; |
aoqi@0 | 65 | case neq: return eql; |
aoqi@0 | 66 | case lss: return geq; |
aoqi@0 | 67 | case leq: return gtr; |
aoqi@0 | 68 | case gtr: return leq; |
aoqi@0 | 69 | case geq: return lss; |
aoqi@0 | 70 | case aeq: assert(false, "Above equal cannot be negated"); |
aoqi@0 | 71 | case beq: assert(false, "Below equal cannot be negated"); |
aoqi@0 | 72 | } |
aoqi@0 | 73 | ShouldNotReachHere(); |
aoqi@0 | 74 | return eql; |
aoqi@0 | 75 | } |
aoqi@0 | 76 | |
aoqi@0 | 77 | void Instruction::update_exception_state(ValueStack* state) { |
aoqi@0 | 78 | if (state != NULL && (state->kind() == ValueStack::EmptyExceptionState || state->kind() == ValueStack::ExceptionState)) { |
aoqi@0 | 79 | assert(state->kind() == ValueStack::EmptyExceptionState || Compilation::current()->env()->jvmti_can_access_local_variables(), "unexpected state kind"); |
aoqi@0 | 80 | _exception_state = state; |
aoqi@0 | 81 | } else { |
aoqi@0 | 82 | _exception_state = NULL; |
aoqi@0 | 83 | } |
aoqi@0 | 84 | } |
aoqi@0 | 85 | |
aoqi@0 | 86 | // Prev without need to have BlockBegin |
aoqi@0 | 87 | Instruction* Instruction::prev() { |
aoqi@0 | 88 | Instruction* p = NULL; |
aoqi@0 | 89 | Instruction* q = block(); |
aoqi@0 | 90 | while (q != this) { |
aoqi@0 | 91 | assert(q != NULL, "this is not in the block's instruction list"); |
aoqi@0 | 92 | p = q; q = q->next(); |
aoqi@0 | 93 | } |
aoqi@0 | 94 | return p; |
aoqi@0 | 95 | } |
aoqi@0 | 96 | |
aoqi@0 | 97 | |
aoqi@0 | 98 | void Instruction::state_values_do(ValueVisitor* f) { |
aoqi@0 | 99 | if (state_before() != NULL) { |
aoqi@0 | 100 | state_before()->values_do(f); |
aoqi@0 | 101 | } |
aoqi@0 | 102 | if (exception_state() != NULL){ |
aoqi@0 | 103 | exception_state()->values_do(f); |
aoqi@0 | 104 | } |
aoqi@0 | 105 | } |
aoqi@0 | 106 | |
aoqi@0 | 107 | ciType* Instruction::exact_type() const { |
aoqi@0 | 108 | ciType* t = declared_type(); |
aoqi@0 | 109 | if (t != NULL && t->is_klass()) { |
aoqi@0 | 110 | return t->as_klass()->exact_klass(); |
aoqi@0 | 111 | } |
aoqi@0 | 112 | return NULL; |
aoqi@0 | 113 | } |
aoqi@0 | 114 | |
aoqi@0 | 115 | |
aoqi@0 | 116 | #ifndef PRODUCT |
aoqi@0 | 117 | void Instruction::check_state(ValueStack* state) { |
aoqi@0 | 118 | if (state != NULL) { |
aoqi@0 | 119 | state->verify(); |
aoqi@0 | 120 | } |
aoqi@0 | 121 | } |
aoqi@0 | 122 | |
aoqi@0 | 123 | |
aoqi@0 | 124 | void Instruction::print() { |
aoqi@0 | 125 | InstructionPrinter ip; |
aoqi@0 | 126 | print(ip); |
aoqi@0 | 127 | } |
aoqi@0 | 128 | |
aoqi@0 | 129 | |
aoqi@0 | 130 | void Instruction::print_line() { |
aoqi@0 | 131 | InstructionPrinter ip; |
aoqi@0 | 132 | ip.print_line(this); |
aoqi@0 | 133 | } |
aoqi@0 | 134 | |
aoqi@0 | 135 | |
aoqi@0 | 136 | void Instruction::print(InstructionPrinter& ip) { |
aoqi@0 | 137 | ip.print_head(); |
aoqi@0 | 138 | ip.print_line(this); |
aoqi@0 | 139 | tty->cr(); |
aoqi@0 | 140 | } |
aoqi@0 | 141 | #endif // PRODUCT |
aoqi@0 | 142 | |
aoqi@0 | 143 | |
aoqi@0 | 144 | // perform constant and interval tests on index value |
aoqi@0 | 145 | bool AccessIndexed::compute_needs_range_check() { |
aoqi@0 | 146 | if (length()) { |
aoqi@0 | 147 | Constant* clength = length()->as_Constant(); |
aoqi@0 | 148 | Constant* cindex = index()->as_Constant(); |
aoqi@0 | 149 | if (clength && cindex) { |
aoqi@0 | 150 | IntConstant* l = clength->type()->as_IntConstant(); |
aoqi@0 | 151 | IntConstant* i = cindex->type()->as_IntConstant(); |
aoqi@0 | 152 | if (l && i && i->value() < l->value() && i->value() >= 0) { |
aoqi@0 | 153 | return false; |
aoqi@0 | 154 | } |
aoqi@0 | 155 | } |
aoqi@0 | 156 | } |
aoqi@0 | 157 | |
aoqi@0 | 158 | if (!this->check_flag(NeedsRangeCheckFlag)) { |
aoqi@0 | 159 | return false; |
aoqi@0 | 160 | } |
aoqi@0 | 161 | |
aoqi@0 | 162 | return true; |
aoqi@0 | 163 | } |
aoqi@0 | 164 | |
aoqi@0 | 165 | |
aoqi@0 | 166 | ciType* Constant::exact_type() const { |
aoqi@0 | 167 | if (type()->is_object() && type()->as_ObjectType()->is_loaded()) { |
aoqi@0 | 168 | return type()->as_ObjectType()->exact_type(); |
aoqi@0 | 169 | } |
aoqi@0 | 170 | return NULL; |
aoqi@0 | 171 | } |
aoqi@0 | 172 | |
aoqi@0 | 173 | ciType* LoadIndexed::exact_type() const { |
aoqi@0 | 174 | ciType* array_type = array()->exact_type(); |
aoqi@0 | 175 | if (array_type != NULL) { |
aoqi@0 | 176 | assert(array_type->is_array_klass(), "what else?"); |
aoqi@0 | 177 | ciArrayKlass* ak = (ciArrayKlass*)array_type; |
aoqi@0 | 178 | |
aoqi@0 | 179 | if (ak->element_type()->is_instance_klass()) { |
aoqi@0 | 180 | ciInstanceKlass* ik = (ciInstanceKlass*)ak->element_type(); |
aoqi@0 | 181 | if (ik->is_loaded() && ik->is_final()) { |
aoqi@0 | 182 | return ik; |
aoqi@0 | 183 | } |
aoqi@0 | 184 | } |
aoqi@0 | 185 | } |
aoqi@0 | 186 | return Instruction::exact_type(); |
aoqi@0 | 187 | } |
aoqi@0 | 188 | |
aoqi@0 | 189 | |
aoqi@0 | 190 | ciType* LoadIndexed::declared_type() const { |
aoqi@0 | 191 | ciType* array_type = array()->declared_type(); |
aoqi@0 | 192 | if (array_type == NULL || !array_type->is_loaded()) { |
aoqi@0 | 193 | return NULL; |
aoqi@0 | 194 | } |
aoqi@0 | 195 | assert(array_type->is_array_klass(), "what else?"); |
aoqi@0 | 196 | ciArrayKlass* ak = (ciArrayKlass*)array_type; |
aoqi@0 | 197 | return ak->element_type(); |
aoqi@0 | 198 | } |
aoqi@0 | 199 | |
aoqi@0 | 200 | |
aoqi@0 | 201 | ciType* LoadField::declared_type() const { |
aoqi@0 | 202 | return field()->type(); |
aoqi@0 | 203 | } |
aoqi@0 | 204 | |
aoqi@0 | 205 | |
aoqi@0 | 206 | ciType* NewTypeArray::exact_type() const { |
aoqi@0 | 207 | return ciTypeArrayKlass::make(elt_type()); |
aoqi@0 | 208 | } |
aoqi@0 | 209 | |
aoqi@0 | 210 | ciType* NewObjectArray::exact_type() const { |
aoqi@0 | 211 | return ciObjArrayKlass::make(klass()); |
aoqi@0 | 212 | } |
aoqi@0 | 213 | |
aoqi@0 | 214 | ciType* NewArray::declared_type() const { |
aoqi@0 | 215 | return exact_type(); |
aoqi@0 | 216 | } |
aoqi@0 | 217 | |
aoqi@0 | 218 | ciType* NewInstance::exact_type() const { |
aoqi@0 | 219 | return klass(); |
aoqi@0 | 220 | } |
aoqi@0 | 221 | |
aoqi@0 | 222 | ciType* NewInstance::declared_type() const { |
aoqi@0 | 223 | return exact_type(); |
aoqi@0 | 224 | } |
aoqi@0 | 225 | |
aoqi@0 | 226 | ciType* CheckCast::declared_type() const { |
aoqi@0 | 227 | return klass(); |
aoqi@0 | 228 | } |
aoqi@0 | 229 | |
aoqi@0 | 230 | // Implementation of ArithmeticOp |
aoqi@0 | 231 | |
aoqi@0 | 232 | bool ArithmeticOp::is_commutative() const { |
aoqi@0 | 233 | switch (op()) { |
aoqi@0 | 234 | case Bytecodes::_iadd: // fall through |
aoqi@0 | 235 | case Bytecodes::_ladd: // fall through |
aoqi@0 | 236 | case Bytecodes::_fadd: // fall through |
aoqi@0 | 237 | case Bytecodes::_dadd: // fall through |
aoqi@0 | 238 | case Bytecodes::_imul: // fall through |
aoqi@0 | 239 | case Bytecodes::_lmul: // fall through |
aoqi@0 | 240 | case Bytecodes::_fmul: // fall through |
aoqi@0 | 241 | case Bytecodes::_dmul: return true; |
aoqi@0 | 242 | } |
aoqi@0 | 243 | return false; |
aoqi@0 | 244 | } |
aoqi@0 | 245 | |
aoqi@0 | 246 | |
aoqi@0 | 247 | bool ArithmeticOp::can_trap() const { |
aoqi@0 | 248 | switch (op()) { |
aoqi@0 | 249 | case Bytecodes::_idiv: // fall through |
aoqi@0 | 250 | case Bytecodes::_ldiv: // fall through |
aoqi@0 | 251 | case Bytecodes::_irem: // fall through |
aoqi@0 | 252 | case Bytecodes::_lrem: return true; |
aoqi@0 | 253 | } |
aoqi@0 | 254 | return false; |
aoqi@0 | 255 | } |
aoqi@0 | 256 | |
aoqi@0 | 257 | |
aoqi@0 | 258 | // Implementation of LogicOp |
aoqi@0 | 259 | |
aoqi@0 | 260 | bool LogicOp::is_commutative() const { |
aoqi@0 | 261 | #ifdef ASSERT |
aoqi@0 | 262 | switch (op()) { |
aoqi@0 | 263 | case Bytecodes::_iand: // fall through |
aoqi@0 | 264 | case Bytecodes::_land: // fall through |
aoqi@0 | 265 | case Bytecodes::_ior : // fall through |
aoqi@0 | 266 | case Bytecodes::_lor : // fall through |
aoqi@0 | 267 | case Bytecodes::_ixor: // fall through |
aoqi@0 | 268 | case Bytecodes::_lxor: break; |
aoqi@0 | 269 | default : ShouldNotReachHere(); |
aoqi@0 | 270 | } |
aoqi@0 | 271 | #endif |
aoqi@0 | 272 | // all LogicOps are commutative |
aoqi@0 | 273 | return true; |
aoqi@0 | 274 | } |
aoqi@0 | 275 | |
aoqi@0 | 276 | |
aoqi@0 | 277 | // Implementation of IfOp |
aoqi@0 | 278 | |
aoqi@0 | 279 | bool IfOp::is_commutative() const { |
aoqi@0 | 280 | return cond() == eql || cond() == neq; |
aoqi@0 | 281 | } |
aoqi@0 | 282 | |
aoqi@0 | 283 | |
aoqi@0 | 284 | // Implementation of StateSplit |
aoqi@0 | 285 | |
aoqi@0 | 286 | void StateSplit::substitute(BlockList& list, BlockBegin* old_block, BlockBegin* new_block) { |
aoqi@0 | 287 | NOT_PRODUCT(bool assigned = false;) |
aoqi@0 | 288 | for (int i = 0; i < list.length(); i++) { |
aoqi@0 | 289 | BlockBegin** b = list.adr_at(i); |
aoqi@0 | 290 | if (*b == old_block) { |
aoqi@0 | 291 | *b = new_block; |
aoqi@0 | 292 | NOT_PRODUCT(assigned = true;) |
aoqi@0 | 293 | } |
aoqi@0 | 294 | } |
aoqi@0 | 295 | assert(assigned == true, "should have assigned at least once"); |
aoqi@0 | 296 | } |
aoqi@0 | 297 | |
aoqi@0 | 298 | |
aoqi@0 | 299 | IRScope* StateSplit::scope() const { |
aoqi@0 | 300 | return _state->scope(); |
aoqi@0 | 301 | } |
aoqi@0 | 302 | |
aoqi@0 | 303 | |
aoqi@0 | 304 | void StateSplit::state_values_do(ValueVisitor* f) { |
aoqi@0 | 305 | Instruction::state_values_do(f); |
aoqi@0 | 306 | if (state() != NULL) state()->values_do(f); |
aoqi@0 | 307 | } |
aoqi@0 | 308 | |
aoqi@0 | 309 | |
aoqi@0 | 310 | void BlockBegin::state_values_do(ValueVisitor* f) { |
aoqi@0 | 311 | StateSplit::state_values_do(f); |
aoqi@0 | 312 | |
aoqi@0 | 313 | if (is_set(BlockBegin::exception_entry_flag)) { |
aoqi@0 | 314 | for (int i = 0; i < number_of_exception_states(); i++) { |
aoqi@0 | 315 | exception_state_at(i)->values_do(f); |
aoqi@0 | 316 | } |
aoqi@0 | 317 | } |
aoqi@0 | 318 | } |
aoqi@0 | 319 | |
aoqi@0 | 320 | |
aoqi@0 | 321 | // Implementation of Invoke |
aoqi@0 | 322 | |
aoqi@0 | 323 | |
aoqi@0 | 324 | Invoke::Invoke(Bytecodes::Code code, ValueType* result_type, Value recv, Values* args, |
aoqi@0 | 325 | int vtable_index, ciMethod* target, ValueStack* state_before) |
aoqi@0 | 326 | : StateSplit(result_type, state_before) |
aoqi@0 | 327 | , _code(code) |
aoqi@0 | 328 | , _recv(recv) |
aoqi@0 | 329 | , _args(args) |
aoqi@0 | 330 | , _vtable_index(vtable_index) |
aoqi@0 | 331 | , _target(target) |
aoqi@0 | 332 | { |
aoqi@0 | 333 | set_flag(TargetIsLoadedFlag, target->is_loaded()); |
aoqi@0 | 334 | set_flag(TargetIsFinalFlag, target_is_loaded() && target->is_final_method()); |
aoqi@0 | 335 | set_flag(TargetIsStrictfpFlag, target_is_loaded() && target->is_strict()); |
aoqi@0 | 336 | |
aoqi@0 | 337 | assert(args != NULL, "args must exist"); |
aoqi@0 | 338 | #ifdef ASSERT |
aoqi@0 | 339 | AssertValues assert_value; |
aoqi@0 | 340 | values_do(&assert_value); |
aoqi@0 | 341 | #endif |
aoqi@0 | 342 | |
aoqi@0 | 343 | // provide an initial guess of signature size. |
aoqi@0 | 344 | _signature = new BasicTypeList(number_of_arguments() + (has_receiver() ? 1 : 0)); |
aoqi@0 | 345 | if (has_receiver()) { |
aoqi@0 | 346 | _signature->append(as_BasicType(receiver()->type())); |
aoqi@0 | 347 | } |
aoqi@0 | 348 | for (int i = 0; i < number_of_arguments(); i++) { |
aoqi@0 | 349 | ValueType* t = argument_at(i)->type(); |
aoqi@0 | 350 | BasicType bt = as_BasicType(t); |
aoqi@0 | 351 | _signature->append(bt); |
aoqi@0 | 352 | } |
aoqi@0 | 353 | } |
aoqi@0 | 354 | |
aoqi@0 | 355 | |
aoqi@0 | 356 | void Invoke::state_values_do(ValueVisitor* f) { |
aoqi@0 | 357 | StateSplit::state_values_do(f); |
aoqi@0 | 358 | if (state_before() != NULL) state_before()->values_do(f); |
aoqi@0 | 359 | if (state() != NULL) state()->values_do(f); |
aoqi@0 | 360 | } |
aoqi@0 | 361 | |
aoqi@0 | 362 | ciType* Invoke::declared_type() const { |
shshahma@8652 | 363 | ciSignature* declared_signature = state()->scope()->method()->get_declared_signature_at_bci(state()->bci()); |
shshahma@8652 | 364 | ciType *t = declared_signature->return_type(); |
aoqi@0 | 365 | assert(t->basic_type() != T_VOID, "need return value of void method?"); |
aoqi@0 | 366 | return t; |
aoqi@0 | 367 | } |
aoqi@0 | 368 | |
aoqi@0 | 369 | // Implementation of Contant |
aoqi@0 | 370 | intx Constant::hash() const { |
aoqi@0 | 371 | if (state_before() == NULL) { |
aoqi@0 | 372 | switch (type()->tag()) { |
aoqi@0 | 373 | case intTag: |
aoqi@0 | 374 | return HASH2(name(), type()->as_IntConstant()->value()); |
aoqi@0 | 375 | case addressTag: |
aoqi@0 | 376 | return HASH2(name(), type()->as_AddressConstant()->value()); |
aoqi@0 | 377 | case longTag: |
aoqi@0 | 378 | { |
aoqi@0 | 379 | jlong temp = type()->as_LongConstant()->value(); |
aoqi@0 | 380 | return HASH3(name(), high(temp), low(temp)); |
aoqi@0 | 381 | } |
aoqi@0 | 382 | case floatTag: |
aoqi@0 | 383 | return HASH2(name(), jint_cast(type()->as_FloatConstant()->value())); |
aoqi@0 | 384 | case doubleTag: |
aoqi@0 | 385 | { |
aoqi@0 | 386 | jlong temp = jlong_cast(type()->as_DoubleConstant()->value()); |
aoqi@0 | 387 | return HASH3(name(), high(temp), low(temp)); |
aoqi@0 | 388 | } |
aoqi@0 | 389 | case objectTag: |
aoqi@0 | 390 | assert(type()->as_ObjectType()->is_loaded(), "can't handle unloaded values"); |
aoqi@0 | 391 | return HASH2(name(), type()->as_ObjectType()->constant_value()); |
aoqi@0 | 392 | case metaDataTag: |
aoqi@0 | 393 | assert(type()->as_MetadataType()->is_loaded(), "can't handle unloaded values"); |
aoqi@0 | 394 | return HASH2(name(), type()->as_MetadataType()->constant_value()); |
aoqi@0 | 395 | default: |
aoqi@0 | 396 | ShouldNotReachHere(); |
aoqi@0 | 397 | } |
aoqi@0 | 398 | } |
aoqi@0 | 399 | return 0; |
aoqi@0 | 400 | } |
aoqi@0 | 401 | |
aoqi@0 | 402 | bool Constant::is_equal(Value v) const { |
aoqi@0 | 403 | if (v->as_Constant() == NULL) return false; |
aoqi@0 | 404 | |
aoqi@0 | 405 | switch (type()->tag()) { |
aoqi@0 | 406 | case intTag: |
aoqi@0 | 407 | { |
aoqi@0 | 408 | IntConstant* t1 = type()->as_IntConstant(); |
aoqi@0 | 409 | IntConstant* t2 = v->type()->as_IntConstant(); |
aoqi@0 | 410 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 411 | t1->value() == t2->value()); |
aoqi@0 | 412 | } |
aoqi@0 | 413 | case longTag: |
aoqi@0 | 414 | { |
aoqi@0 | 415 | LongConstant* t1 = type()->as_LongConstant(); |
aoqi@0 | 416 | LongConstant* t2 = v->type()->as_LongConstant(); |
aoqi@0 | 417 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 418 | t1->value() == t2->value()); |
aoqi@0 | 419 | } |
aoqi@0 | 420 | case floatTag: |
aoqi@0 | 421 | { |
aoqi@0 | 422 | FloatConstant* t1 = type()->as_FloatConstant(); |
aoqi@0 | 423 | FloatConstant* t2 = v->type()->as_FloatConstant(); |
aoqi@0 | 424 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 425 | jint_cast(t1->value()) == jint_cast(t2->value())); |
aoqi@0 | 426 | } |
aoqi@0 | 427 | case doubleTag: |
aoqi@0 | 428 | { |
aoqi@0 | 429 | DoubleConstant* t1 = type()->as_DoubleConstant(); |
aoqi@0 | 430 | DoubleConstant* t2 = v->type()->as_DoubleConstant(); |
aoqi@0 | 431 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 432 | jlong_cast(t1->value()) == jlong_cast(t2->value())); |
aoqi@0 | 433 | } |
aoqi@0 | 434 | case objectTag: |
aoqi@0 | 435 | { |
aoqi@0 | 436 | ObjectType* t1 = type()->as_ObjectType(); |
aoqi@0 | 437 | ObjectType* t2 = v->type()->as_ObjectType(); |
aoqi@0 | 438 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 439 | t1->is_loaded() && t2->is_loaded() && |
aoqi@0 | 440 | t1->constant_value() == t2->constant_value()); |
aoqi@0 | 441 | } |
aoqi@0 | 442 | case metaDataTag: |
aoqi@0 | 443 | { |
aoqi@0 | 444 | MetadataType* t1 = type()->as_MetadataType(); |
aoqi@0 | 445 | MetadataType* t2 = v->type()->as_MetadataType(); |
aoqi@0 | 446 | return (t1 != NULL && t2 != NULL && |
aoqi@0 | 447 | t1->is_loaded() && t2->is_loaded() && |
aoqi@0 | 448 | t1->constant_value() == t2->constant_value()); |
aoqi@0 | 449 | } |
aoqi@0 | 450 | } |
aoqi@0 | 451 | return false; |
aoqi@0 | 452 | } |
aoqi@0 | 453 | |
aoqi@0 | 454 | Constant::CompareResult Constant::compare(Instruction::Condition cond, Value right) const { |
aoqi@0 | 455 | Constant* rc = right->as_Constant(); |
aoqi@0 | 456 | // other is not a constant |
aoqi@0 | 457 | if (rc == NULL) return not_comparable; |
aoqi@0 | 458 | |
aoqi@0 | 459 | ValueType* lt = type(); |
aoqi@0 | 460 | ValueType* rt = rc->type(); |
aoqi@0 | 461 | // different types |
aoqi@0 | 462 | if (lt->base() != rt->base()) return not_comparable; |
aoqi@0 | 463 | switch (lt->tag()) { |
aoqi@0 | 464 | case intTag: { |
aoqi@0 | 465 | int x = lt->as_IntConstant()->value(); |
aoqi@0 | 466 | int y = rt->as_IntConstant()->value(); |
aoqi@0 | 467 | switch (cond) { |
aoqi@0 | 468 | case If::eql: return x == y ? cond_true : cond_false; |
aoqi@0 | 469 | case If::neq: return x != y ? cond_true : cond_false; |
aoqi@0 | 470 | case If::lss: return x < y ? cond_true : cond_false; |
aoqi@0 | 471 | case If::leq: return x <= y ? cond_true : cond_false; |
aoqi@0 | 472 | case If::gtr: return x > y ? cond_true : cond_false; |
aoqi@0 | 473 | case If::geq: return x >= y ? cond_true : cond_false; |
aoqi@0 | 474 | } |
aoqi@0 | 475 | break; |
aoqi@0 | 476 | } |
aoqi@0 | 477 | case longTag: { |
aoqi@0 | 478 | jlong x = lt->as_LongConstant()->value(); |
aoqi@0 | 479 | jlong y = rt->as_LongConstant()->value(); |
aoqi@0 | 480 | switch (cond) { |
aoqi@0 | 481 | case If::eql: return x == y ? cond_true : cond_false; |
aoqi@0 | 482 | case If::neq: return x != y ? cond_true : cond_false; |
aoqi@0 | 483 | case If::lss: return x < y ? cond_true : cond_false; |
aoqi@0 | 484 | case If::leq: return x <= y ? cond_true : cond_false; |
aoqi@0 | 485 | case If::gtr: return x > y ? cond_true : cond_false; |
aoqi@0 | 486 | case If::geq: return x >= y ? cond_true : cond_false; |
aoqi@0 | 487 | } |
aoqi@0 | 488 | break; |
aoqi@0 | 489 | } |
aoqi@0 | 490 | case objectTag: { |
aoqi@0 | 491 | ciObject* xvalue = lt->as_ObjectType()->constant_value(); |
aoqi@0 | 492 | ciObject* yvalue = rt->as_ObjectType()->constant_value(); |
aoqi@0 | 493 | assert(xvalue != NULL && yvalue != NULL, "not constants"); |
aoqi@0 | 494 | if (xvalue->is_loaded() && yvalue->is_loaded()) { |
aoqi@0 | 495 | switch (cond) { |
aoqi@0 | 496 | case If::eql: return xvalue == yvalue ? cond_true : cond_false; |
aoqi@0 | 497 | case If::neq: return xvalue != yvalue ? cond_true : cond_false; |
aoqi@0 | 498 | } |
aoqi@0 | 499 | } |
aoqi@0 | 500 | break; |
aoqi@0 | 501 | } |
aoqi@0 | 502 | case metaDataTag: { |
aoqi@0 | 503 | ciMetadata* xvalue = lt->as_MetadataType()->constant_value(); |
aoqi@0 | 504 | ciMetadata* yvalue = rt->as_MetadataType()->constant_value(); |
aoqi@0 | 505 | assert(xvalue != NULL && yvalue != NULL, "not constants"); |
aoqi@0 | 506 | if (xvalue->is_loaded() && yvalue->is_loaded()) { |
aoqi@0 | 507 | switch (cond) { |
aoqi@0 | 508 | case If::eql: return xvalue == yvalue ? cond_true : cond_false; |
aoqi@0 | 509 | case If::neq: return xvalue != yvalue ? cond_true : cond_false; |
aoqi@0 | 510 | } |
aoqi@0 | 511 | } |
aoqi@0 | 512 | break; |
aoqi@0 | 513 | } |
aoqi@0 | 514 | } |
aoqi@0 | 515 | return not_comparable; |
aoqi@0 | 516 | } |
aoqi@0 | 517 | |
aoqi@0 | 518 | |
aoqi@0 | 519 | // Implementation of BlockBegin |
aoqi@0 | 520 | |
aoqi@0 | 521 | void BlockBegin::set_end(BlockEnd* end) { |
aoqi@0 | 522 | assert(end != NULL, "should not reset block end to NULL"); |
aoqi@0 | 523 | if (end == _end) { |
aoqi@0 | 524 | return; |
aoqi@0 | 525 | } |
aoqi@0 | 526 | clear_end(); |
aoqi@0 | 527 | |
aoqi@0 | 528 | // Set the new end |
aoqi@0 | 529 | _end = end; |
aoqi@0 | 530 | |
aoqi@0 | 531 | _successors.clear(); |
aoqi@0 | 532 | // Now reset successors list based on BlockEnd |
aoqi@0 | 533 | for (int i = 0; i < end->number_of_sux(); i++) { |
aoqi@0 | 534 | BlockBegin* sux = end->sux_at(i); |
aoqi@0 | 535 | _successors.append(sux); |
aoqi@0 | 536 | sux->_predecessors.append(this); |
aoqi@0 | 537 | } |
aoqi@0 | 538 | _end->set_begin(this); |
aoqi@0 | 539 | } |
aoqi@0 | 540 | |
aoqi@0 | 541 | |
aoqi@0 | 542 | void BlockBegin::clear_end() { |
aoqi@0 | 543 | // Must make the predecessors/successors match up with the |
aoqi@0 | 544 | // BlockEnd's notion. |
aoqi@0 | 545 | if (_end != NULL) { |
aoqi@0 | 546 | // disconnect from the old end |
aoqi@0 | 547 | _end->set_begin(NULL); |
aoqi@0 | 548 | |
aoqi@0 | 549 | // disconnect this block from it's current successors |
aoqi@0 | 550 | for (int i = 0; i < _successors.length(); i++) { |
aoqi@0 | 551 | _successors.at(i)->remove_predecessor(this); |
aoqi@0 | 552 | } |
aoqi@0 | 553 | _end = NULL; |
aoqi@0 | 554 | } |
aoqi@0 | 555 | } |
aoqi@0 | 556 | |
aoqi@0 | 557 | |
aoqi@0 | 558 | void BlockBegin::disconnect_edge(BlockBegin* from, BlockBegin* to) { |
aoqi@0 | 559 | // disconnect any edges between from and to |
aoqi@0 | 560 | #ifndef PRODUCT |
aoqi@0 | 561 | if (PrintIR && Verbose) { |
aoqi@0 | 562 | tty->print_cr("Disconnected edge B%d -> B%d", from->block_id(), to->block_id()); |
aoqi@0 | 563 | } |
aoqi@0 | 564 | #endif |
aoqi@0 | 565 | for (int s = 0; s < from->number_of_sux();) { |
aoqi@0 | 566 | BlockBegin* sux = from->sux_at(s); |
aoqi@0 | 567 | if (sux == to) { |
aoqi@0 | 568 | int index = sux->_predecessors.index_of(from); |
aoqi@0 | 569 | if (index >= 0) { |
aoqi@0 | 570 | sux->_predecessors.remove_at(index); |
aoqi@0 | 571 | } |
aoqi@0 | 572 | from->_successors.remove_at(s); |
aoqi@0 | 573 | } else { |
aoqi@0 | 574 | s++; |
aoqi@0 | 575 | } |
aoqi@0 | 576 | } |
aoqi@0 | 577 | } |
aoqi@0 | 578 | |
aoqi@0 | 579 | |
aoqi@0 | 580 | void BlockBegin::disconnect_from_graph() { |
aoqi@0 | 581 | // disconnect this block from all other blocks |
aoqi@0 | 582 | for (int p = 0; p < number_of_preds(); p++) { |
aoqi@0 | 583 | pred_at(p)->remove_successor(this); |
aoqi@0 | 584 | } |
aoqi@0 | 585 | for (int s = 0; s < number_of_sux(); s++) { |
aoqi@0 | 586 | sux_at(s)->remove_predecessor(this); |
aoqi@0 | 587 | } |
aoqi@0 | 588 | } |
aoqi@0 | 589 | |
aoqi@0 | 590 | void BlockBegin::substitute_sux(BlockBegin* old_sux, BlockBegin* new_sux) { |
aoqi@0 | 591 | // modify predecessors before substituting successors |
aoqi@0 | 592 | for (int i = 0; i < number_of_sux(); i++) { |
aoqi@0 | 593 | if (sux_at(i) == old_sux) { |
aoqi@0 | 594 | // remove old predecessor before adding new predecessor |
aoqi@0 | 595 | // otherwise there is a dead predecessor in the list |
aoqi@0 | 596 | new_sux->remove_predecessor(old_sux); |
aoqi@0 | 597 | new_sux->add_predecessor(this); |
aoqi@0 | 598 | } |
aoqi@0 | 599 | } |
aoqi@0 | 600 | old_sux->remove_predecessor(this); |
aoqi@0 | 601 | end()->substitute_sux(old_sux, new_sux); |
aoqi@0 | 602 | } |
aoqi@0 | 603 | |
aoqi@0 | 604 | |
aoqi@0 | 605 | |
aoqi@0 | 606 | // In general it is not possible to calculate a value for the field "depth_first_number" |
aoqi@0 | 607 | // of the inserted block, without recomputing the values of the other blocks |
aoqi@0 | 608 | // in the CFG. Therefore the value of "depth_first_number" in BlockBegin becomes meaningless. |
aoqi@0 | 609 | BlockBegin* BlockBegin::insert_block_between(BlockBegin* sux) { |
aoqi@0 | 610 | int bci = sux->bci(); |
aoqi@0 | 611 | // critical edge splitting may introduce a goto after a if and array |
aoqi@0 | 612 | // bound check elimination may insert a predicate between the if and |
aoqi@0 | 613 | // goto. The bci of the goto can't be the one of the if otherwise |
aoqi@0 | 614 | // the state and bci are inconsistent and a deoptimization triggered |
aoqi@0 | 615 | // by the predicate would lead to incorrect execution/a crash. |
aoqi@0 | 616 | BlockBegin* new_sux = new BlockBegin(bci); |
aoqi@0 | 617 | |
aoqi@0 | 618 | // mark this block (special treatment when block order is computed) |
aoqi@0 | 619 | new_sux->set(critical_edge_split_flag); |
aoqi@0 | 620 | |
aoqi@0 | 621 | // This goto is not a safepoint. |
aoqi@0 | 622 | Goto* e = new Goto(sux, false); |
aoqi@0 | 623 | new_sux->set_next(e, bci); |
aoqi@0 | 624 | new_sux->set_end(e); |
aoqi@0 | 625 | // setup states |
aoqi@0 | 626 | ValueStack* s = end()->state(); |
aoqi@0 | 627 | new_sux->set_state(s->copy(s->kind(), bci)); |
aoqi@0 | 628 | e->set_state(s->copy(s->kind(), bci)); |
aoqi@0 | 629 | assert(new_sux->state()->locals_size() == s->locals_size(), "local size mismatch!"); |
aoqi@0 | 630 | assert(new_sux->state()->stack_size() == s->stack_size(), "stack size mismatch!"); |
aoqi@0 | 631 | assert(new_sux->state()->locks_size() == s->locks_size(), "locks size mismatch!"); |
aoqi@0 | 632 | |
aoqi@0 | 633 | // link predecessor to new block |
aoqi@0 | 634 | end()->substitute_sux(sux, new_sux); |
aoqi@0 | 635 | |
aoqi@0 | 636 | // The ordering needs to be the same, so remove the link that the |
aoqi@0 | 637 | // set_end call above added and substitute the new_sux for this |
aoqi@0 | 638 | // block. |
aoqi@0 | 639 | sux->remove_predecessor(new_sux); |
aoqi@0 | 640 | |
aoqi@0 | 641 | // the successor could be the target of a switch so it might have |
aoqi@0 | 642 | // multiple copies of this predecessor, so substitute the new_sux |
aoqi@0 | 643 | // for the first and delete the rest. |
aoqi@0 | 644 | bool assigned = false; |
aoqi@0 | 645 | BlockList& list = sux->_predecessors; |
aoqi@0 | 646 | for (int i = 0; i < list.length(); i++) { |
aoqi@0 | 647 | BlockBegin** b = list.adr_at(i); |
aoqi@0 | 648 | if (*b == this) { |
aoqi@0 | 649 | if (assigned) { |
aoqi@0 | 650 | list.remove_at(i); |
aoqi@0 | 651 | // reprocess this index |
aoqi@0 | 652 | i--; |
aoqi@0 | 653 | } else { |
aoqi@0 | 654 | assigned = true; |
aoqi@0 | 655 | *b = new_sux; |
aoqi@0 | 656 | } |
aoqi@0 | 657 | // link the new block back to it's predecessors. |
aoqi@0 | 658 | new_sux->add_predecessor(this); |
aoqi@0 | 659 | } |
aoqi@0 | 660 | } |
aoqi@0 | 661 | assert(assigned == true, "should have assigned at least once"); |
aoqi@0 | 662 | return new_sux; |
aoqi@0 | 663 | } |
aoqi@0 | 664 | |
aoqi@0 | 665 | |
aoqi@0 | 666 | void BlockBegin::remove_successor(BlockBegin* pred) { |
aoqi@0 | 667 | int idx; |
aoqi@0 | 668 | while ((idx = _successors.index_of(pred)) >= 0) { |
aoqi@0 | 669 | _successors.remove_at(idx); |
aoqi@0 | 670 | } |
aoqi@0 | 671 | } |
aoqi@0 | 672 | |
aoqi@0 | 673 | |
aoqi@0 | 674 | void BlockBegin::add_predecessor(BlockBegin* pred) { |
aoqi@0 | 675 | _predecessors.append(pred); |
aoqi@0 | 676 | } |
aoqi@0 | 677 | |
aoqi@0 | 678 | |
aoqi@0 | 679 | void BlockBegin::remove_predecessor(BlockBegin* pred) { |
aoqi@0 | 680 | int idx; |
aoqi@0 | 681 | while ((idx = _predecessors.index_of(pred)) >= 0) { |
aoqi@0 | 682 | _predecessors.remove_at(idx); |
aoqi@0 | 683 | } |
aoqi@0 | 684 | } |
aoqi@0 | 685 | |
aoqi@0 | 686 | |
aoqi@0 | 687 | void BlockBegin::add_exception_handler(BlockBegin* b) { |
aoqi@0 | 688 | assert(b != NULL && (b->is_set(exception_entry_flag)), "exception handler must exist"); |
aoqi@0 | 689 | // add only if not in the list already |
aoqi@0 | 690 | if (!_exception_handlers.contains(b)) _exception_handlers.append(b); |
aoqi@0 | 691 | } |
aoqi@0 | 692 | |
aoqi@0 | 693 | int BlockBegin::add_exception_state(ValueStack* state) { |
aoqi@0 | 694 | assert(is_set(exception_entry_flag), "only for xhandlers"); |
aoqi@0 | 695 | if (_exception_states == NULL) { |
aoqi@0 | 696 | _exception_states = new ValueStackStack(4); |
aoqi@0 | 697 | } |
aoqi@0 | 698 | _exception_states->append(state); |
aoqi@0 | 699 | return _exception_states->length() - 1; |
aoqi@0 | 700 | } |
aoqi@0 | 701 | |
aoqi@0 | 702 | |
aoqi@0 | 703 | void BlockBegin::iterate_preorder(boolArray& mark, BlockClosure* closure) { |
aoqi@0 | 704 | if (!mark.at(block_id())) { |
aoqi@0 | 705 | mark.at_put(block_id(), true); |
aoqi@0 | 706 | closure->block_do(this); |
aoqi@0 | 707 | BlockEnd* e = end(); // must do this after block_do because block_do may change it! |
aoqi@0 | 708 | { for (int i = number_of_exception_handlers() - 1; i >= 0; i--) exception_handler_at(i)->iterate_preorder(mark, closure); } |
aoqi@0 | 709 | { for (int i = e->number_of_sux () - 1; i >= 0; i--) e->sux_at (i)->iterate_preorder(mark, closure); } |
aoqi@0 | 710 | } |
aoqi@0 | 711 | } |
aoqi@0 | 712 | |
aoqi@0 | 713 | |
aoqi@0 | 714 | void BlockBegin::iterate_postorder(boolArray& mark, BlockClosure* closure) { |
aoqi@0 | 715 | if (!mark.at(block_id())) { |
aoqi@0 | 716 | mark.at_put(block_id(), true); |
aoqi@0 | 717 | BlockEnd* e = end(); |
aoqi@0 | 718 | { for (int i = number_of_exception_handlers() - 1; i >= 0; i--) exception_handler_at(i)->iterate_postorder(mark, closure); } |
aoqi@0 | 719 | { for (int i = e->number_of_sux () - 1; i >= 0; i--) e->sux_at (i)->iterate_postorder(mark, closure); } |
aoqi@0 | 720 | closure->block_do(this); |
aoqi@0 | 721 | } |
aoqi@0 | 722 | } |
aoqi@0 | 723 | |
aoqi@0 | 724 | |
aoqi@0 | 725 | void BlockBegin::iterate_preorder(BlockClosure* closure) { |
aoqi@0 | 726 | boolArray mark(number_of_blocks(), false); |
aoqi@0 | 727 | iterate_preorder(mark, closure); |
aoqi@0 | 728 | } |
aoqi@0 | 729 | |
aoqi@0 | 730 | |
aoqi@0 | 731 | void BlockBegin::iterate_postorder(BlockClosure* closure) { |
aoqi@0 | 732 | boolArray mark(number_of_blocks(), false); |
aoqi@0 | 733 | iterate_postorder(mark, closure); |
aoqi@0 | 734 | } |
aoqi@0 | 735 | |
aoqi@0 | 736 | |
aoqi@0 | 737 | void BlockBegin::block_values_do(ValueVisitor* f) { |
aoqi@0 | 738 | for (Instruction* n = this; n != NULL; n = n->next()) n->values_do(f); |
aoqi@0 | 739 | } |
aoqi@0 | 740 | |
aoqi@0 | 741 | |
aoqi@0 | 742 | #ifndef PRODUCT |
aoqi@0 | 743 | #define TRACE_PHI(code) if (PrintPhiFunctions) { code; } |
aoqi@0 | 744 | #else |
aoqi@0 | 745 | #define TRACE_PHI(coce) |
aoqi@0 | 746 | #endif |
aoqi@0 | 747 | |
aoqi@0 | 748 | |
aoqi@0 | 749 | bool BlockBegin::try_merge(ValueStack* new_state) { |
aoqi@0 | 750 | TRACE_PHI(tty->print_cr("********** try_merge for block B%d", block_id())); |
aoqi@0 | 751 | |
aoqi@0 | 752 | // local variables used for state iteration |
aoqi@0 | 753 | int index; |
aoqi@0 | 754 | Value new_value, existing_value; |
aoqi@0 | 755 | |
aoqi@0 | 756 | ValueStack* existing_state = state(); |
aoqi@0 | 757 | if (existing_state == NULL) { |
aoqi@0 | 758 | TRACE_PHI(tty->print_cr("first call of try_merge for this block")); |
aoqi@0 | 759 | |
aoqi@0 | 760 | if (is_set(BlockBegin::was_visited_flag)) { |
aoqi@0 | 761 | // this actually happens for complicated jsr/ret structures |
aoqi@0 | 762 | return false; // BAILOUT in caller |
aoqi@0 | 763 | } |
aoqi@0 | 764 | |
aoqi@0 | 765 | // copy state because it is altered |
aoqi@0 | 766 | new_state = new_state->copy(ValueStack::BlockBeginState, bci()); |
aoqi@0 | 767 | |
aoqi@0 | 768 | // Use method liveness to invalidate dead locals |
aoqi@0 | 769 | MethodLivenessResult liveness = new_state->scope()->method()->liveness_at_bci(bci()); |
aoqi@0 | 770 | if (liveness.is_valid()) { |
aoqi@0 | 771 | assert((int)liveness.size() == new_state->locals_size(), "error in use of liveness"); |
aoqi@0 | 772 | |
aoqi@0 | 773 | for_each_local_value(new_state, index, new_value) { |
aoqi@0 | 774 | if (!liveness.at(index) || new_value->type()->is_illegal()) { |
aoqi@0 | 775 | new_state->invalidate_local(index); |
aoqi@0 | 776 | TRACE_PHI(tty->print_cr("invalidating dead local %d", index)); |
aoqi@0 | 777 | } |
aoqi@0 | 778 | } |
aoqi@0 | 779 | } |
aoqi@0 | 780 | |
aoqi@0 | 781 | if (is_set(BlockBegin::parser_loop_header_flag)) { |
aoqi@0 | 782 | TRACE_PHI(tty->print_cr("loop header block, initializing phi functions")); |
aoqi@0 | 783 | |
aoqi@0 | 784 | for_each_stack_value(new_state, index, new_value) { |
aoqi@0 | 785 | new_state->setup_phi_for_stack(this, index); |
aoqi@0 | 786 | TRACE_PHI(tty->print_cr("creating phi-function %c%d for stack %d", new_state->stack_at(index)->type()->tchar(), new_state->stack_at(index)->id(), index)); |
aoqi@0 | 787 | } |
aoqi@0 | 788 | |
aoqi@0 | 789 | BitMap requires_phi_function = new_state->scope()->requires_phi_function(); |
aoqi@0 | 790 | |
aoqi@0 | 791 | for_each_local_value(new_state, index, new_value) { |
aoqi@0 | 792 | bool requires_phi = requires_phi_function.at(index) || (new_value->type()->is_double_word() && requires_phi_function.at(index + 1)); |
aoqi@0 | 793 | if (requires_phi || !SelectivePhiFunctions) { |
aoqi@0 | 794 | new_state->setup_phi_for_local(this, index); |
aoqi@0 | 795 | TRACE_PHI(tty->print_cr("creating phi-function %c%d for local %d", new_state->local_at(index)->type()->tchar(), new_state->local_at(index)->id(), index)); |
aoqi@0 | 796 | } |
aoqi@0 | 797 | } |
aoqi@0 | 798 | } |
aoqi@0 | 799 | |
aoqi@0 | 800 | // initialize state of block |
aoqi@0 | 801 | set_state(new_state); |
aoqi@0 | 802 | |
aoqi@0 | 803 | } else if (existing_state->is_same(new_state)) { |
aoqi@0 | 804 | TRACE_PHI(tty->print_cr("exisiting state found")); |
aoqi@0 | 805 | |
aoqi@0 | 806 | assert(existing_state->scope() == new_state->scope(), "not matching"); |
aoqi@0 | 807 | assert(existing_state->locals_size() == new_state->locals_size(), "not matching"); |
aoqi@0 | 808 | assert(existing_state->stack_size() == new_state->stack_size(), "not matching"); |
aoqi@0 | 809 | |
aoqi@0 | 810 | if (is_set(BlockBegin::was_visited_flag)) { |
aoqi@0 | 811 | TRACE_PHI(tty->print_cr("loop header block, phis must be present")); |
aoqi@0 | 812 | |
aoqi@0 | 813 | if (!is_set(BlockBegin::parser_loop_header_flag)) { |
aoqi@0 | 814 | // this actually happens for complicated jsr/ret structures |
aoqi@0 | 815 | return false; // BAILOUT in caller |
aoqi@0 | 816 | } |
aoqi@0 | 817 | |
aoqi@0 | 818 | for_each_local_value(existing_state, index, existing_value) { |
aoqi@0 | 819 | Value new_value = new_state->local_at(index); |
aoqi@0 | 820 | if (new_value == NULL || new_value->type()->tag() != existing_value->type()->tag()) { |
aoqi@0 | 821 | // The old code invalidated the phi function here |
aoqi@0 | 822 | // Because dead locals are replaced with NULL, this is a very rare case now, so simply bail out |
aoqi@0 | 823 | return false; // BAILOUT in caller |
aoqi@0 | 824 | } |
aoqi@0 | 825 | } |
aoqi@0 | 826 | |
aoqi@0 | 827 | #ifdef ASSERT |
aoqi@0 | 828 | // check that all necessary phi functions are present |
aoqi@0 | 829 | for_each_stack_value(existing_state, index, existing_value) { |
aoqi@0 | 830 | assert(existing_value->as_Phi() != NULL && existing_value->as_Phi()->block() == this, "phi function required"); |
aoqi@0 | 831 | } |
aoqi@0 | 832 | for_each_local_value(existing_state, index, existing_value) { |
aoqi@0 | 833 | assert(existing_value == new_state->local_at(index) || (existing_value->as_Phi() != NULL && existing_value->as_Phi()->as_Phi()->block() == this), "phi function required"); |
aoqi@0 | 834 | } |
aoqi@0 | 835 | #endif |
aoqi@0 | 836 | |
aoqi@0 | 837 | } else { |
aoqi@0 | 838 | TRACE_PHI(tty->print_cr("creating phi functions on demand")); |
aoqi@0 | 839 | |
aoqi@0 | 840 | // create necessary phi functions for stack |
aoqi@0 | 841 | for_each_stack_value(existing_state, index, existing_value) { |
aoqi@0 | 842 | Value new_value = new_state->stack_at(index); |
aoqi@0 | 843 | Phi* existing_phi = existing_value->as_Phi(); |
aoqi@0 | 844 | |
aoqi@0 | 845 | if (new_value != existing_value && (existing_phi == NULL || existing_phi->block() != this)) { |
aoqi@0 | 846 | existing_state->setup_phi_for_stack(this, index); |
aoqi@0 | 847 | TRACE_PHI(tty->print_cr("creating phi-function %c%d for stack %d", existing_state->stack_at(index)->type()->tchar(), existing_state->stack_at(index)->id(), index)); |
aoqi@0 | 848 | } |
aoqi@0 | 849 | } |
aoqi@0 | 850 | |
aoqi@0 | 851 | // create necessary phi functions for locals |
aoqi@0 | 852 | for_each_local_value(existing_state, index, existing_value) { |
aoqi@0 | 853 | Value new_value = new_state->local_at(index); |
aoqi@0 | 854 | Phi* existing_phi = existing_value->as_Phi(); |
aoqi@0 | 855 | |
aoqi@0 | 856 | if (new_value == NULL || new_value->type()->tag() != existing_value->type()->tag()) { |
aoqi@0 | 857 | existing_state->invalidate_local(index); |
aoqi@0 | 858 | TRACE_PHI(tty->print_cr("invalidating local %d because of type mismatch", index)); |
aoqi@0 | 859 | } else if (new_value != existing_value && (existing_phi == NULL || existing_phi->block() != this)) { |
aoqi@0 | 860 | existing_state->setup_phi_for_local(this, index); |
aoqi@0 | 861 | TRACE_PHI(tty->print_cr("creating phi-function %c%d for local %d", existing_state->local_at(index)->type()->tchar(), existing_state->local_at(index)->id(), index)); |
aoqi@0 | 862 | } |
aoqi@0 | 863 | } |
aoqi@0 | 864 | } |
aoqi@0 | 865 | |
aoqi@0 | 866 | assert(existing_state->caller_state() == new_state->caller_state(), "caller states must be equal"); |
aoqi@0 | 867 | |
aoqi@0 | 868 | } else { |
aoqi@0 | 869 | assert(false, "stack or locks not matching (invalid bytecodes)"); |
aoqi@0 | 870 | return false; |
aoqi@0 | 871 | } |
aoqi@0 | 872 | |
aoqi@0 | 873 | TRACE_PHI(tty->print_cr("********** try_merge for block B%d successful", block_id())); |
aoqi@0 | 874 | |
aoqi@0 | 875 | return true; |
aoqi@0 | 876 | } |
aoqi@0 | 877 | |
aoqi@0 | 878 | |
aoqi@0 | 879 | #ifndef PRODUCT |
aoqi@0 | 880 | void BlockBegin::print_block() { |
aoqi@0 | 881 | InstructionPrinter ip; |
aoqi@0 | 882 | print_block(ip, false); |
aoqi@0 | 883 | } |
aoqi@0 | 884 | |
aoqi@0 | 885 | |
aoqi@0 | 886 | void BlockBegin::print_block(InstructionPrinter& ip, bool live_only) { |
aoqi@0 | 887 | ip.print_instr(this); tty->cr(); |
aoqi@0 | 888 | ip.print_stack(this->state()); tty->cr(); |
aoqi@0 | 889 | ip.print_inline_level(this); |
aoqi@0 | 890 | ip.print_head(); |
aoqi@0 | 891 | for (Instruction* n = next(); n != NULL; n = n->next()) { |
aoqi@0 | 892 | if (!live_only || n->is_pinned() || n->use_count() > 0) { |
aoqi@0 | 893 | ip.print_line(n); |
aoqi@0 | 894 | } |
aoqi@0 | 895 | } |
aoqi@0 | 896 | tty->cr(); |
aoqi@0 | 897 | } |
aoqi@0 | 898 | #endif // PRODUCT |
aoqi@0 | 899 | |
aoqi@0 | 900 | |
aoqi@0 | 901 | // Implementation of BlockList |
aoqi@0 | 902 | |
aoqi@0 | 903 | void BlockList::iterate_forward (BlockClosure* closure) { |
aoqi@0 | 904 | const int l = length(); |
aoqi@0 | 905 | for (int i = 0; i < l; i++) closure->block_do(at(i)); |
aoqi@0 | 906 | } |
aoqi@0 | 907 | |
aoqi@0 | 908 | |
aoqi@0 | 909 | void BlockList::iterate_backward(BlockClosure* closure) { |
aoqi@0 | 910 | for (int i = length() - 1; i >= 0; i--) closure->block_do(at(i)); |
aoqi@0 | 911 | } |
aoqi@0 | 912 | |
aoqi@0 | 913 | |
aoqi@0 | 914 | void BlockList::blocks_do(void f(BlockBegin*)) { |
aoqi@0 | 915 | for (int i = length() - 1; i >= 0; i--) f(at(i)); |
aoqi@0 | 916 | } |
aoqi@0 | 917 | |
aoqi@0 | 918 | |
aoqi@0 | 919 | void BlockList::values_do(ValueVisitor* f) { |
aoqi@0 | 920 | for (int i = length() - 1; i >= 0; i--) at(i)->block_values_do(f); |
aoqi@0 | 921 | } |
aoqi@0 | 922 | |
aoqi@0 | 923 | |
aoqi@0 | 924 | #ifndef PRODUCT |
aoqi@0 | 925 | void BlockList::print(bool cfg_only, bool live_only) { |
aoqi@0 | 926 | InstructionPrinter ip; |
aoqi@0 | 927 | for (int i = 0; i < length(); i++) { |
aoqi@0 | 928 | BlockBegin* block = at(i); |
aoqi@0 | 929 | if (cfg_only) { |
aoqi@0 | 930 | ip.print_instr(block); tty->cr(); |
aoqi@0 | 931 | } else { |
aoqi@0 | 932 | block->print_block(ip, live_only); |
aoqi@0 | 933 | } |
aoqi@0 | 934 | } |
aoqi@0 | 935 | } |
aoqi@0 | 936 | #endif // PRODUCT |
aoqi@0 | 937 | |
aoqi@0 | 938 | |
aoqi@0 | 939 | // Implementation of BlockEnd |
aoqi@0 | 940 | |
aoqi@0 | 941 | void BlockEnd::set_begin(BlockBegin* begin) { |
aoqi@0 | 942 | BlockList* sux = NULL; |
aoqi@0 | 943 | if (begin != NULL) { |
aoqi@0 | 944 | sux = begin->successors(); |
aoqi@0 | 945 | } else if (this->begin() != NULL) { |
aoqi@0 | 946 | // copy our sux list |
aoqi@0 | 947 | BlockList* sux = new BlockList(this->begin()->number_of_sux()); |
aoqi@0 | 948 | for (int i = 0; i < this->begin()->number_of_sux(); i++) { |
aoqi@0 | 949 | sux->append(this->begin()->sux_at(i)); |
aoqi@0 | 950 | } |
aoqi@0 | 951 | } |
aoqi@0 | 952 | _sux = sux; |
aoqi@0 | 953 | } |
aoqi@0 | 954 | |
aoqi@0 | 955 | |
aoqi@0 | 956 | void BlockEnd::substitute_sux(BlockBegin* old_sux, BlockBegin* new_sux) { |
aoqi@0 | 957 | substitute(*_sux, old_sux, new_sux); |
aoqi@0 | 958 | } |
aoqi@0 | 959 | |
aoqi@0 | 960 | |
aoqi@0 | 961 | // Implementation of Phi |
aoqi@0 | 962 | |
aoqi@0 | 963 | // Normal phi functions take their operands from the last instruction of the |
aoqi@0 | 964 | // predecessor. Special handling is needed for xhanlder entries because there |
aoqi@0 | 965 | // the state of arbitrary instructions are needed. |
aoqi@0 | 966 | |
aoqi@0 | 967 | Value Phi::operand_at(int i) const { |
aoqi@0 | 968 | ValueStack* state; |
aoqi@0 | 969 | if (_block->is_set(BlockBegin::exception_entry_flag)) { |
aoqi@0 | 970 | state = _block->exception_state_at(i); |
aoqi@0 | 971 | } else { |
aoqi@0 | 972 | state = _block->pred_at(i)->end()->state(); |
aoqi@0 | 973 | } |
aoqi@0 | 974 | assert(state != NULL, ""); |
aoqi@0 | 975 | |
aoqi@0 | 976 | if (is_local()) { |
aoqi@0 | 977 | return state->local_at(local_index()); |
aoqi@0 | 978 | } else { |
aoqi@0 | 979 | return state->stack_at(stack_index()); |
aoqi@0 | 980 | } |
aoqi@0 | 981 | } |
aoqi@0 | 982 | |
aoqi@0 | 983 | |
aoqi@0 | 984 | int Phi::operand_count() const { |
aoqi@0 | 985 | if (_block->is_set(BlockBegin::exception_entry_flag)) { |
aoqi@0 | 986 | return _block->number_of_exception_states(); |
aoqi@0 | 987 | } else { |
aoqi@0 | 988 | return _block->number_of_preds(); |
aoqi@0 | 989 | } |
aoqi@0 | 990 | } |
aoqi@0 | 991 | |
aoqi@0 | 992 | #ifdef ASSERT |
aoqi@0 | 993 | // Constructor of Assert |
aoqi@0 | 994 | Assert::Assert(Value x, Condition cond, bool unordered_is_true, Value y) : Instruction(illegalType) |
aoqi@0 | 995 | , _x(x) |
aoqi@0 | 996 | , _cond(cond) |
aoqi@0 | 997 | , _y(y) |
aoqi@0 | 998 | { |
aoqi@0 | 999 | set_flag(UnorderedIsTrueFlag, unordered_is_true); |
aoqi@0 | 1000 | assert(x->type()->tag() == y->type()->tag(), "types must match"); |
aoqi@0 | 1001 | pin(); |
aoqi@0 | 1002 | |
aoqi@0 | 1003 | stringStream strStream; |
aoqi@0 | 1004 | Compilation::current()->method()->print_name(&strStream); |
aoqi@0 | 1005 | |
aoqi@0 | 1006 | stringStream strStream1; |
aoqi@0 | 1007 | InstructionPrinter ip1(1, &strStream1); |
aoqi@0 | 1008 | ip1.print_instr(x); |
aoqi@0 | 1009 | |
aoqi@0 | 1010 | stringStream strStream2; |
aoqi@0 | 1011 | InstructionPrinter ip2(1, &strStream2); |
aoqi@0 | 1012 | ip2.print_instr(y); |
aoqi@0 | 1013 | |
aoqi@0 | 1014 | stringStream ss; |
aoqi@0 | 1015 | ss.print("Assertion %s %s %s in method %s", strStream1.as_string(), ip2.cond_name(cond), strStream2.as_string(), strStream.as_string()); |
aoqi@0 | 1016 | |
aoqi@0 | 1017 | _message = ss.as_string(); |
aoqi@0 | 1018 | } |
aoqi@0 | 1019 | #endif |
aoqi@0 | 1020 | |
aoqi@0 | 1021 | void RangeCheckPredicate::check_state() { |
aoqi@0 | 1022 | assert(state()->kind() != ValueStack::EmptyExceptionState && state()->kind() != ValueStack::ExceptionState, "will deopt with empty state"); |
aoqi@0 | 1023 | } |
aoqi@0 | 1024 | |
aoqi@0 | 1025 | void ProfileInvoke::state_values_do(ValueVisitor* f) { |
aoqi@0 | 1026 | if (state() != NULL) state()->values_do(f); |
aoqi@0 | 1027 | } |