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src/hotspot/share/c1/c1_Instruction.cpp

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  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 "c1/c1_IR.hpp"
  27 #include "c1/c1_Instruction.hpp"
  28 #include "c1/c1_InstructionPrinter.hpp"
  29 #include "c1/c1_ValueStack.hpp"


  30 #include "ci/ciObjArrayKlass.hpp"
  31 #include "ci/ciTypeArrayKlass.hpp"
  32 #include "utilities/bitMap.inline.hpp"
  33 
  34 
  35 // Implementation of Instruction
  36 
  37 
  38 int Instruction::dominator_depth() {
  39   int result = -1;
  40   if (block()) {
  41     result = block()->dominator_depth();
  42   }
  43   assert(result != -1 || this->as_Local(), "Only locals have dominator depth -1");
  44   return result;
  45 }
  46 
  47 Instruction::Condition Instruction::mirror(Condition cond) {
  48   switch (cond) {
  49     case eql: return eql;

  89   Instruction* p = nullptr;
  90   Instruction* q = block();
  91   while (q != this) {
  92     assert(q != nullptr, "this is not in the block's instruction list");
  93     p = q; q = q->next();
  94   }
  95   return p;
  96 }
  97 
  98 
  99 void Instruction::state_values_do(ValueVisitor* f) {
 100   if (state_before() != nullptr) {
 101     state_before()->values_do(f);
 102   }
 103   if (exception_state() != nullptr) {
 104     exception_state()->values_do(f);
 105   }
 106 }
 107 
 108 ciType* Instruction::exact_type() const {
 109   ciType* t =  declared_type();
 110   if (t != nullptr && t->is_klass()) {
 111     return t->as_klass()->exact_klass();
 112   }
 113   return nullptr;
 114 }
 115 





























































 116 
 117 #ifndef PRODUCT
 118 void Instruction::check_state(ValueStack* state) {
 119   if (state != nullptr) {
 120     state->verify();
 121   }
 122 }
 123 
 124 
 125 void Instruction::print() {
 126   InstructionPrinter ip;
 127   print(ip);
 128 }
 129 
 130 
 131 void Instruction::print_line() {
 132   InstructionPrinter ip;
 133   ip.print_line(this);
 134 }
 135 

 156     }
 157   }
 158 
 159   if (!this->check_flag(NeedsRangeCheckFlag)) {
 160     return false;
 161   }
 162 
 163   return true;
 164 }
 165 
 166 
 167 ciType* Constant::exact_type() const {
 168   if (type()->is_object() && type()->as_ObjectType()->is_loaded()) {
 169     return type()->as_ObjectType()->exact_type();
 170   }
 171   return nullptr;
 172 }
 173 
 174 ciType* LoadIndexed::exact_type() const {
 175   ciType* array_type = array()->exact_type();
 176   if (array_type != nullptr) {
 177     assert(array_type->is_array_klass(), "what else?");
 178     ciArrayKlass* ak = (ciArrayKlass*)array_type;
 179 
 180     if (ak->element_type()->is_instance_klass()) {
 181       ciInstanceKlass* ik = (ciInstanceKlass*)ak->element_type();
 182       if (ik->is_loaded() && ik->is_final()) {
 183         return ik;
 184       }
 185     }
 186   }
 187   return Instruction::exact_type();
 188 }
 189 
 190 
 191 ciType* LoadIndexed::declared_type() const {



 192   ciType* array_type = array()->declared_type();
 193   if (array_type == nullptr || !array_type->is_loaded()) {
 194     return nullptr;
 195   }
 196   assert(array_type->is_array_klass(), "what else?");
 197   ciArrayKlass* ak = (ciArrayKlass*)array_type;
 198   return ak->element_type();
 199 }
 200 














 201 
 202 ciType* LoadField::declared_type() const {
 203   return field()->type();
 204 }
 205 
 206 
 207 ciType* NewTypeArray::exact_type() const {
 208   return ciTypeArrayKlass::make(elt_type());
 209 }
 210 
 211 ciType* NewObjectArray::exact_type() const {
 212   return ciObjArrayKlass::make(klass());




 213 }
 214 
 215 ciType* NewArray::declared_type() const {
 216   return exact_type();
 217 }
 218 
 219 ciType* NewInstance::exact_type() const {
 220   return klass();
 221 }
 222 
 223 ciType* NewInstance::declared_type() const {
 224   return exact_type();
 225 }
 226 
 227 ciType* CheckCast::declared_type() const {
 228   return klass();
 229 }
 230 
 231 // Implementation of ArithmeticOp
 232 

 302 }
 303 
 304 
 305 void StateSplit::state_values_do(ValueVisitor* f) {
 306   Instruction::state_values_do(f);
 307   if (state() != nullptr) state()->values_do(f);
 308 }
 309 
 310 
 311 void BlockBegin::state_values_do(ValueVisitor* f) {
 312   StateSplit::state_values_do(f);
 313 
 314   if (is_set(BlockBegin::exception_entry_flag)) {
 315     for (int i = 0; i < number_of_exception_states(); i++) {
 316       exception_state_at(i)->values_do(f);
 317     }
 318   }
 319 }
 320 
 321 





























 322 // Implementation of Invoke
 323 
 324 
 325 Invoke::Invoke(Bytecodes::Code code, ValueType* result_type, Value recv, Values* args,
 326                ciMethod* target, ValueStack* state_before)
 327   : StateSplit(result_type, state_before)
 328   , _code(code)
 329   , _recv(recv)
 330   , _args(args)
 331   , _target(target)
 332 {
 333   set_flag(TargetIsLoadedFlag,   target->is_loaded());
 334   set_flag(TargetIsFinalFlag,    target_is_loaded() && target->is_final_method());
 335 
 336   assert(args != nullptr, "args must exist");
 337 #ifdef ASSERT
 338   AssertValues assert_value;
 339   values_do(&assert_value);
 340 #endif
 341 
 342   // provide an initial guess of signature size.
 343   _signature = new BasicTypeList(number_of_arguments() + (has_receiver() ? 1 : 0));
 344   if (has_receiver()) {
 345     _signature->append(as_BasicType(receiver()->type()));
 346   }
 347   for (int i = 0; i < number_of_arguments(); i++) {
 348     ValueType* t = argument_at(i)->type();

 349     BasicType bt = as_BasicType(t);
 350     _signature->append(bt);
 351   }
 352 }
 353 
 354 
 355 void Invoke::state_values_do(ValueVisitor* f) {
 356   StateSplit::state_values_do(f);
 357   if (state_before() != nullptr) state_before()->values_do(f);
 358   if (state()        != nullptr) state()->values_do(f);
 359 }
 360 
 361 ciType* Invoke::declared_type() const {
 362   ciSignature* declared_signature = state()->scope()->method()->get_declared_signature_at_bci(state()->bci());
 363   ciType *t = declared_signature->return_type();
 364   assert(t->basic_type() != T_VOID, "need return value of void method?");
 365   return t;
 366 }
 367 
 368 // Implementation of Constant

 971   ip1.print_instr(x);
 972 
 973   stringStream strStream2;
 974   InstructionPrinter ip2(1, &strStream2);
 975   ip2.print_instr(y);
 976 
 977   stringStream ss;
 978   ss.print("Assertion %s %s %s in method %s", strStream1.freeze(), ip2.cond_name(cond), strStream2.freeze(), strStream.freeze());
 979 
 980   _message = ss.as_string();
 981 }
 982 #endif
 983 
 984 void RangeCheckPredicate::check_state() {
 985   assert(state()->kind() != ValueStack::EmptyExceptionState && state()->kind() != ValueStack::ExceptionState, "will deopt with empty state");
 986 }
 987 
 988 void ProfileInvoke::state_values_do(ValueVisitor* f) {
 989   if (state() != nullptr) state()->values_do(f);
 990 }


  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 "c1/c1_IR.hpp"
  27 #include "c1/c1_Instruction.hpp"
  28 #include "c1/c1_InstructionPrinter.hpp"
  29 #include "c1/c1_ValueStack.hpp"
  30 #include "ci/ciFlatArrayKlass.hpp"
  31 #include "ci/ciInlineKlass.hpp"
  32 #include "ci/ciObjArrayKlass.hpp"
  33 #include "ci/ciTypeArrayKlass.hpp"
  34 #include "utilities/bitMap.inline.hpp"
  35 
  36 
  37 // Implementation of Instruction
  38 
  39 
  40 int Instruction::dominator_depth() {
  41   int result = -1;
  42   if (block()) {
  43     result = block()->dominator_depth();
  44   }
  45   assert(result != -1 || this->as_Local(), "Only locals have dominator depth -1");
  46   return result;
  47 }
  48 
  49 Instruction::Condition Instruction::mirror(Condition cond) {
  50   switch (cond) {
  51     case eql: return eql;

  91   Instruction* p = nullptr;
  92   Instruction* q = block();
  93   while (q != this) {
  94     assert(q != nullptr, "this is not in the block's instruction list");
  95     p = q; q = q->next();
  96   }
  97   return p;
  98 }
  99 
 100 
 101 void Instruction::state_values_do(ValueVisitor* f) {
 102   if (state_before() != nullptr) {
 103     state_before()->values_do(f);
 104   }
 105   if (exception_state() != nullptr) {
 106     exception_state()->values_do(f);
 107   }
 108 }
 109 
 110 ciType* Instruction::exact_type() const {
 111   ciType* t = declared_type();
 112   if (t != nullptr && t->is_klass()) {
 113     return t->as_klass()->exact_klass();
 114   }
 115   return nullptr;
 116 }
 117 
 118 ciKlass* Instruction::as_loaded_klass_or_null() const {
 119   ciType* type = declared_type();
 120   if (type != nullptr && type->is_klass()) {
 121     ciKlass* klass = type->as_klass();
 122     if (klass->is_loaded()) {
 123       return klass;
 124     }
 125   }
 126   return nullptr;
 127 }
 128 
 129 bool Instruction::is_loaded_flat_array() const {
 130   if (UseFlatArray) {
 131     ciType* type = declared_type();
 132     return type != nullptr && type->is_flat_array_klass();
 133   }
 134   return false;
 135 }
 136 
 137 bool Instruction::maybe_flat_array() {
 138   if (UseFlatArray) {
 139     ciType* type = declared_type();
 140     if (type != nullptr) {
 141       if (type->is_obj_array_klass()) {
 142         // TODO 8325106 Fix comment
 143         // The runtime type of [LMyValue might be [QMyValue due to [QMyValue <: [LMyValue.
 144         ciKlass* element_klass = type->as_obj_array_klass()->element_klass();
 145         if (element_klass->can_be_inline_klass() && (!element_klass->is_inlinetype() || element_klass->as_inline_klass()->flat_in_array())) {
 146           return true;
 147         }
 148       } else if (type->is_flat_array_klass()) {
 149         return true;
 150       } else if (type->is_klass() && type->as_klass()->is_java_lang_Object()) {
 151         // This can happen as a parameter to System.arraycopy()
 152         return true;
 153       }
 154     } else {
 155       // Type info gets lost during Phi merging (Phi, IfOp, etc), but we might be storing into a
 156       // flat array, so we should do a runtime check.
 157       return true;
 158     }
 159   }
 160   return false;
 161 }
 162 
 163 bool Instruction::maybe_null_free_array() {
 164   ciType* type = declared_type();
 165   if (type != nullptr) {
 166     if (type->is_obj_array_klass()) {
 167       // Due to array covariance, the runtime type might be a null-free array.
 168       if (type->as_obj_array_klass()->can_be_inline_array_klass()) {
 169         return true;
 170       }
 171     }
 172   } else {
 173     // Type info gets lost during Phi merging (Phi, IfOp, etc), but we might be storing into a
 174     // null-free array, so we should do a runtime check.
 175     return true;
 176   }
 177   return false;
 178 }
 179 
 180 #ifndef PRODUCT
 181 void Instruction::check_state(ValueStack* state) {
 182   if (state != nullptr) {
 183     state->verify();
 184   }
 185 }
 186 
 187 
 188 void Instruction::print() {
 189   InstructionPrinter ip;
 190   print(ip);
 191 }
 192 
 193 
 194 void Instruction::print_line() {
 195   InstructionPrinter ip;
 196   ip.print_line(this);
 197 }
 198 

 219     }
 220   }
 221 
 222   if (!this->check_flag(NeedsRangeCheckFlag)) {
 223     return false;
 224   }
 225 
 226   return true;
 227 }
 228 
 229 
 230 ciType* Constant::exact_type() const {
 231   if (type()->is_object() && type()->as_ObjectType()->is_loaded()) {
 232     return type()->as_ObjectType()->exact_type();
 233   }
 234   return nullptr;
 235 }
 236 
 237 ciType* LoadIndexed::exact_type() const {
 238   ciType* array_type = array()->exact_type();
 239   if (delayed() == nullptr && array_type != nullptr) {
 240     assert(array_type->is_array_klass(), "what else?");
 241     ciArrayKlass* ak = (ciArrayKlass*)array_type;
 242 
 243     if (ak->element_type()->is_instance_klass()) {
 244       ciInstanceKlass* ik = (ciInstanceKlass*)ak->element_type();
 245       if (ik->is_loaded() && ik->is_final()) {
 246         return ik;
 247       }
 248     }
 249   }
 250   return Instruction::exact_type();
 251 }
 252 

 253 ciType* LoadIndexed::declared_type() const {
 254   if (delayed() != nullptr) {
 255     return delayed()->field()->type();
 256   }
 257   ciType* array_type = array()->declared_type();
 258   if (array_type == nullptr || !array_type->is_loaded()) {
 259     return nullptr;
 260   }
 261   assert(array_type->is_array_klass(), "what else?");
 262   ciArrayKlass* ak = (ciArrayKlass*)array_type;
 263   return ak->element_type();
 264 }
 265 
 266 bool StoreIndexed::is_exact_flat_array_store() const {
 267   if (array()->is_loaded_flat_array() && value()->as_Constant() == nullptr && value()->declared_type() != nullptr) {
 268     ciKlass* element_klass = array()->declared_type()->as_flat_array_klass()->element_klass();
 269     ciKlass* actual_klass = value()->declared_type()->as_klass();
 270 
 271     // The following check can fail with inlining:
 272     //     void test45_inline(Object[] oa, Object o, int index) { oa[index] = o; }
 273     //     void test45(MyValue1[] va, int index, MyValue2 v) { test45_inline(va, v, index); }
 274     if (element_klass == actual_klass) {
 275       return true;
 276     }
 277   }
 278   return false;
 279 }
 280 
 281 ciType* LoadField::declared_type() const {
 282   return field()->type();
 283 }
 284 
 285 
 286 ciType* NewTypeArray::exact_type() const {
 287   return ciTypeArrayKlass::make(elt_type());
 288 }
 289 
 290 ciType* NewObjectArray::exact_type() const {
 291   return ciArrayKlass::make(klass());
 292 }
 293 
 294 ciType* NewMultiArray::exact_type() const {
 295   return _klass;
 296 }
 297 
 298 ciType* NewArray::declared_type() const {
 299   return exact_type();
 300 }
 301 
 302 ciType* NewInstance::exact_type() const {
 303   return klass();
 304 }
 305 
 306 ciType* NewInstance::declared_type() const {
 307   return exact_type();
 308 }
 309 
 310 ciType* CheckCast::declared_type() const {
 311   return klass();
 312 }
 313 
 314 // Implementation of ArithmeticOp
 315 

 385 }
 386 
 387 
 388 void StateSplit::state_values_do(ValueVisitor* f) {
 389   Instruction::state_values_do(f);
 390   if (state() != nullptr) state()->values_do(f);
 391 }
 392 
 393 
 394 void BlockBegin::state_values_do(ValueVisitor* f) {
 395   StateSplit::state_values_do(f);
 396 
 397   if (is_set(BlockBegin::exception_entry_flag)) {
 398     for (int i = 0; i < number_of_exception_states(); i++) {
 399       exception_state_at(i)->values_do(f);
 400     }
 401   }
 402 }
 403 
 404 
 405 StoreField::StoreField(Value obj, int offset, ciField* field, Value value, bool is_static,
 406                        ValueStack* state_before, bool needs_patching)
 407   : AccessField(obj, offset, field, is_static, state_before, needs_patching)
 408   , _value(value)
 409   , _enclosing_field(nullptr)
 410 {
 411   set_flag(NeedsWriteBarrierFlag, as_ValueType(field_type())->is_object());
 412 #ifdef ASSERT
 413   AssertValues assert_value;
 414   values_do(&assert_value);
 415 #endif
 416   pin();
 417 }
 418 
 419 StoreIndexed::StoreIndexed(Value array, Value index, Value length, BasicType elt_type, Value value,
 420                            ValueStack* state_before, bool check_boolean, bool mismatched)
 421   : AccessIndexed(array, index, length, elt_type, state_before, mismatched)
 422   , _value(value), _check_boolean(check_boolean)
 423 {
 424   set_flag(NeedsWriteBarrierFlag, (as_ValueType(elt_type)->is_object()));
 425   set_flag(NeedsStoreCheckFlag, (as_ValueType(elt_type)->is_object()));
 426 #ifdef ASSERT
 427   AssertValues assert_value;
 428   values_do(&assert_value);
 429 #endif
 430   pin();
 431 }
 432 
 433 
 434 // Implementation of Invoke
 435 
 436 
 437 Invoke::Invoke(Bytecodes::Code code, ValueType* result_type, Value recv, Values* args,
 438                ciMethod* target, ValueStack* state_before)
 439   : StateSplit(result_type, state_before)
 440   , _code(code)
 441   , _recv(recv)
 442   , _args(args)
 443   , _target(target)
 444 {
 445   set_flag(TargetIsLoadedFlag,   target->is_loaded());
 446   set_flag(TargetIsFinalFlag,    target_is_loaded() && target->is_final_method());
 447 
 448   assert(args != nullptr, "args must exist");
 449 #ifdef ASSERT
 450   AssertValues assert_value;
 451   values_do(&assert_value);
 452 #endif
 453 
 454   // provide an initial guess of signature size.
 455   _signature = new BasicTypeList(number_of_arguments() + (has_receiver() ? 1 : 0));
 456   if (has_receiver()) {
 457     _signature->append(as_BasicType(receiver()->type()));
 458   }
 459   for (int i = 0; i < number_of_arguments(); i++) {
 460     Value v = argument_at(i);
 461     ValueType* t = v->type();
 462     BasicType bt = as_BasicType(t);
 463     _signature->append(bt);
 464   }
 465 }
 466 
 467 
 468 void Invoke::state_values_do(ValueVisitor* f) {
 469   StateSplit::state_values_do(f);
 470   if (state_before() != nullptr) state_before()->values_do(f);
 471   if (state()        != nullptr) state()->values_do(f);
 472 }
 473 
 474 ciType* Invoke::declared_type() const {
 475   ciSignature* declared_signature = state()->scope()->method()->get_declared_signature_at_bci(state()->bci());
 476   ciType *t = declared_signature->return_type();
 477   assert(t->basic_type() != T_VOID, "need return value of void method?");
 478   return t;
 479 }
 480 
 481 // Implementation of Constant

1084   ip1.print_instr(x);
1085 
1086   stringStream strStream2;
1087   InstructionPrinter ip2(1, &strStream2);
1088   ip2.print_instr(y);
1089 
1090   stringStream ss;
1091   ss.print("Assertion %s %s %s in method %s", strStream1.freeze(), ip2.cond_name(cond), strStream2.freeze(), strStream.freeze());
1092 
1093   _message = ss.as_string();
1094 }
1095 #endif
1096 
1097 void RangeCheckPredicate::check_state() {
1098   assert(state()->kind() != ValueStack::EmptyExceptionState && state()->kind() != ValueStack::ExceptionState, "will deopt with empty state");
1099 }
1100 
1101 void ProfileInvoke::state_values_do(ValueVisitor* f) {
1102   if (state() != nullptr) state()->values_do(f);
1103 }
1104 
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