1 /* 2 * Copyright (c) 2005, 2016, 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 #ifndef SHARE_VM_C1_C1_LIRGENERATOR_HPP 26 #define SHARE_VM_C1_C1_LIRGENERATOR_HPP 27 28 #include "c1/c1_Instruction.hpp" 29 #include "c1/c1_LIR.hpp" 30 #include "ci/ciMethodData.hpp" 31 #include "utilities/sizes.hpp" 32 33 // The classes responsible for code emission and register allocation 34 35 36 class LIRGenerator; 37 class LIREmitter; 38 class Invoke; 39 class SwitchRange; 40 class LIRItem; 41 42 define_array(LIRItemArray, LIRItem*) 43 define_stack(LIRItemList, LIRItemArray) 44 45 class SwitchRange: public CompilationResourceObj { 46 private: 47 int _low_key; 48 int _high_key; 49 BlockBegin* _sux; 50 public: 51 SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {} 52 void set_high_key(int key) { _high_key = key; } 53 54 int high_key() const { return _high_key; } 55 int low_key() const { return _low_key; } 56 BlockBegin* sux() const { return _sux; } 57 }; 58 59 define_array(SwitchRangeArray, SwitchRange*) 60 define_stack(SwitchRangeList, SwitchRangeArray) 61 62 63 class ResolveNode; 64 65 define_array(NodeArray, ResolveNode*); 66 define_stack(NodeList, NodeArray); 67 68 69 // Node objects form a directed graph of LIR_Opr 70 // Edges between Nodes represent moves from one Node to its destinations 71 class ResolveNode: public CompilationResourceObj { 72 private: 73 LIR_Opr _operand; // the source or destinaton 74 NodeList _destinations; // for the operand 75 bool _assigned; // Value assigned to this Node? 76 bool _visited; // Node already visited? 77 bool _start_node; // Start node already visited? 78 79 public: 80 ResolveNode(LIR_Opr operand) 81 : _operand(operand) 82 , _assigned(false) 83 , _visited(false) 84 , _start_node(false) {}; 85 86 // accessors 87 LIR_Opr operand() const { return _operand; } 88 int no_of_destinations() const { return _destinations.length(); } 89 ResolveNode* destination_at(int i) { return _destinations[i]; } 90 bool assigned() const { return _assigned; } 91 bool visited() const { return _visited; } 92 bool start_node() const { return _start_node; } 93 94 // modifiers 95 void append(ResolveNode* dest) { _destinations.append(dest); } 96 void set_assigned() { _assigned = true; } 97 void set_visited() { _visited = true; } 98 void set_start_node() { _start_node = true; } 99 }; 100 101 102 // This is shared state to be used by the PhiResolver so the operand 103 // arrays don't have to be reallocated for reach resolution. 104 class PhiResolverState: public CompilationResourceObj { 105 friend class PhiResolver; 106 107 private: 108 NodeList _virtual_operands; // Nodes where the operand is a virtual register 109 NodeList _other_operands; // Nodes where the operand is not a virtual register 110 NodeList _vreg_table; // Mapping from virtual register to Node 111 112 public: 113 PhiResolverState() {} 114 115 void reset(int max_vregs); 116 }; 117 118 119 // class used to move value of phi operand to phi function 120 class PhiResolver: public CompilationResourceObj { 121 private: 122 LIRGenerator* _gen; 123 PhiResolverState& _state; // temporary state cached by LIRGenerator 124 125 ResolveNode* _loop; 126 LIR_Opr _temp; 127 128 // access to shared state arrays 129 NodeList& virtual_operands() { return _state._virtual_operands; } 130 NodeList& other_operands() { return _state._other_operands; } 131 NodeList& vreg_table() { return _state._vreg_table; } 132 133 ResolveNode* create_node(LIR_Opr opr, bool source); 134 ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); } 135 ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); } 136 137 void emit_move(LIR_Opr src, LIR_Opr dest); 138 void move_to_temp(LIR_Opr src); 139 void move_temp_to(LIR_Opr dest); 140 void move(ResolveNode* src, ResolveNode* dest); 141 142 LIRGenerator* gen() { 143 return _gen; 144 } 145 146 public: 147 PhiResolver(LIRGenerator* _lir_gen, int max_vregs); 148 ~PhiResolver(); 149 150 void move(LIR_Opr src, LIR_Opr dest); 151 }; 152 153 154 // only the classes below belong in the same file 155 class LIRGenerator: public InstructionVisitor, public BlockClosure { 156 157 private: 158 Compilation* _compilation; 159 ciMethod* _method; // method that we are compiling 160 PhiResolverState _resolver_state; 161 BlockBegin* _block; 162 int _virtual_register_number; 163 Values _instruction_for_operand; 164 BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis 165 LIR_List* _lir; 166 BarrierSet* _bs; 167 168 LIRGenerator* gen() { 169 return this; 170 } 171 172 void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN; 173 174 #ifdef ASSERT 175 LIR_List* lir(const char * file, int line) const { 176 _lir->set_file_and_line(file, line); 177 return _lir; 178 } 179 #endif 180 LIR_List* lir() const { 181 return _lir; 182 } 183 184 // a simple cache of constants used within a block 185 GrowableArray<LIR_Const*> _constants; 186 LIR_OprList _reg_for_constants; 187 Values _unpinned_constants; 188 189 friend class PhiResolver; 190 191 // unified bailout support 192 void bailout(const char* msg) const { compilation()->bailout(msg); } 193 bool bailed_out() const { return compilation()->bailed_out(); } 194 195 void block_do_prolog(BlockBegin* block); 196 void block_do_epilog(BlockBegin* block); 197 198 // register allocation 199 LIR_Opr rlock(Value instr); // lock a free register 200 LIR_Opr rlock_result(Value instr); 201 LIR_Opr rlock_result(Value instr, BasicType type); 202 LIR_Opr rlock_byte(BasicType type); 203 LIR_Opr rlock_callee_saved(BasicType type); 204 205 // get a constant into a register and get track of what register was used 206 LIR_Opr load_constant(Constant* x); 207 LIR_Opr load_constant(LIR_Const* constant); 208 209 // Given an immediate value, return an operand usable in logical ops. 210 LIR_Opr load_immediate(int x, BasicType type); 211 212 void set_result(Value x, LIR_Opr opr) { 213 assert(opr->is_valid(), "must set to valid value"); 214 assert(x->operand()->is_illegal(), "operand should never change"); 215 assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register"); 216 x->set_operand(opr); 217 assert(opr == x->operand(), "must be"); 218 if (opr->is_virtual()) { 219 _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL); 220 } 221 } 222 void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); } 223 224 friend class LIRItem; 225 226 LIR_Opr round_item(LIR_Opr opr); 227 LIR_Opr force_to_spill(LIR_Opr value, BasicType t); 228 229 LIR_Opr force_opr_to(LIR_Opr op, LIR_Opr reg); 230 231 PhiResolverState& resolver_state() { return _resolver_state; } 232 233 void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val); 234 void move_to_phi(ValueStack* cur_state); 235 236 // code emission 237 void do_ArithmeticOp_Long (ArithmeticOp* x); 238 void do_ArithmeticOp_Int (ArithmeticOp* x); 239 void do_ArithmeticOp_FPU (ArithmeticOp* x); 240 241 // platform dependent 242 LIR_Opr getThreadPointer(); 243 244 void do_RegisterFinalizer(Intrinsic* x); 245 void do_isInstance(Intrinsic* x); 246 void do_getClass(Intrinsic* x); 247 void do_currentThread(Intrinsic* x); 248 void do_MathIntrinsic(Intrinsic* x); 249 void do_ArrayCopy(Intrinsic* x); 250 void do_CompareAndSwap(Intrinsic* x, ValueType* type); 251 void do_NIOCheckIndex(Intrinsic* x); 252 void do_FPIntrinsics(Intrinsic* x); 253 void do_Reference_get(Intrinsic* x); 254 void do_update_CRC32(Intrinsic* x); 255 256 void do_UnsafePrefetch(UnsafePrefetch* x, bool is_store); 257 258 LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info); 259 LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info); 260 261 // convenience functions 262 LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info); 263 LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info); 264 265 // GC Barriers 266 267 // generic interface 268 269 void pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, bool do_load, bool patch, CodeEmitInfo* info); 270 void post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val); 271 272 #if INCLUDE_ALL_GCS 273 LIR_Opr shenandoah_read_barrier(LIR_Opr obj, CodeEmitInfo* info, bool need_null_check); 274 LIR_Opr shenandoah_write_barrier(LIR_Opr obj, CodeEmitInfo* info, bool need_null_check); 275 LIR_Opr ensure_in_register(LIR_Opr obj); 276 #endif 277 278 // specific implementations 279 // pre barriers 280 281 void G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, 282 bool do_load, bool patch, CodeEmitInfo* info); 283 284 // post barriers 285 286 void G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val); 287 void CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val); 288 #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER 289 void CardTableModRef_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base); 290 #endif 291 292 293 static LIR_Opr result_register_for(ValueType* type, bool callee = false); 294 295 ciObject* get_jobject_constant(Value value); 296 297 LIRItemList* invoke_visit_arguments(Invoke* x); 298 void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list); 299 300 void trace_block_entry(BlockBegin* block); 301 302 // volatile field operations are never patchable because a klass 303 // must be loaded to know it's volatile which means that the offset 304 // it always known as well. 305 void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info); 306 void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info); 307 308 void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile); 309 void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile); 310 311 void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args); 312 313 void increment_counter(address counter, BasicType type, int step = 1); 314 void increment_counter(LIR_Address* addr, int step = 1); 315 316 // is_strictfp is only needed for mul and div (and only generates different code on i486) 317 void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL); 318 // machine dependent. returns true if it emitted code for the multiply 319 bool strength_reduce_multiply(LIR_Opr left, int constant, LIR_Opr result, LIR_Opr tmp); 320 321 void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes); 322 323 void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false); 324 325 // this loads the length and compares against the index 326 void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info); 327 // For java.nio.Buffer.checkIndex 328 void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info); 329 330 void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp); 331 void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL); 332 void arithmetic_op_fpu (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp = LIR_OprFact::illegalOpr); 333 334 void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp); 335 336 void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right); 337 338 void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info); 339 void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no); 340 341 void new_instance (LIR_Opr dst, ciInstanceKlass* klass, bool is_unresolved, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info); 342 343 // machine dependent 344 void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info); 345 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info); 346 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info); 347 348 void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type); 349 350 // returns a LIR_Address to address an array location. May also 351 // emit some code as part of address calculation. If 352 // needs_card_mark is true then compute the full address for use by 353 // both the store and the card mark. 354 LIR_Address* generate_address(LIR_Opr base, 355 LIR_Opr index, int shift, 356 int disp, 357 BasicType type); 358 LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) { 359 return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type); 360 } 361 LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark); 362 363 // the helper for generate_address 364 void add_large_constant(LIR_Opr src, int c, LIR_Opr dest); 365 366 // machine preferences and characteristics 367 bool can_inline_as_constant(Value i) const; 368 bool can_inline_as_constant(LIR_Const* c) const; 369 bool can_store_as_constant(Value i, BasicType type) const; 370 371 LIR_Opr safepoint_poll_register(); 372 373 void profile_branch(If* if_instr, If::Condition cond); 374 void increment_event_counter_impl(CodeEmitInfo* info, 375 ciMethod *method, int frequency, 376 int bci, bool backedge, bool notify); 377 void increment_event_counter(CodeEmitInfo* info, int bci, bool backedge); 378 void increment_invocation_counter(CodeEmitInfo *info) { 379 if (compilation()->count_invocations()) { 380 increment_event_counter(info, InvocationEntryBci, false); 381 } 382 } 383 void increment_backedge_counter(CodeEmitInfo* info, int bci) { 384 if (compilation()->count_backedges()) { 385 increment_event_counter(info, bci, true); 386 } 387 } 388 389 CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false); 390 CodeEmitInfo* state_for(Instruction* x); 391 392 // allocates a virtual register for this instruction if 393 // one isn't already allocated. Only for Phi and Local. 394 LIR_Opr operand_for_instruction(Instruction *x); 395 396 void set_block(BlockBegin* block) { _block = block; } 397 398 void block_prolog(BlockBegin* block); 399 void block_epilog(BlockBegin* block); 400 401 void do_root (Instruction* instr); 402 void walk (Instruction* instr); 403 404 void bind_block_entry(BlockBegin* block); 405 void start_block(BlockBegin* block); 406 407 LIR_Opr new_register(BasicType type); 408 LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); } 409 LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); } 410 411 // returns a register suitable for doing pointer math 412 LIR_Opr new_pointer_register() { 413 #ifdef _LP64 414 return new_register(T_LONG); 415 #else 416 return new_register(T_INT); 417 #endif 418 } 419 420 static LIR_Condition lir_cond(If::Condition cond) { 421 LIR_Condition l = lir_cond_unknown; 422 switch (cond) { 423 case If::eql: l = lir_cond_equal; break; 424 case If::neq: l = lir_cond_notEqual; break; 425 case If::lss: l = lir_cond_less; break; 426 case If::leq: l = lir_cond_lessEqual; break; 427 case If::geq: l = lir_cond_greaterEqual; break; 428 case If::gtr: l = lir_cond_greater; break; 429 case If::aeq: l = lir_cond_aboveEqual; break; 430 case If::beq: l = lir_cond_belowEqual; break; 431 default: fatal("You must pass valid If::Condition"); 432 }; 433 return l; 434 } 435 436 #ifdef __SOFTFP__ 437 void do_soft_float_compare(If *x); 438 #endif // __SOFTFP__ 439 440 void init(); 441 442 SwitchRangeArray* create_lookup_ranges(TableSwitch* x); 443 SwitchRangeArray* create_lookup_ranges(LookupSwitch* x); 444 void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux); 445 446 void do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x); 447 #ifdef TRACE_HAVE_INTRINSICS 448 void do_ThreadIDIntrinsic(Intrinsic* x); 449 void do_ClassIDIntrinsic(Intrinsic* x); 450 #endif 451 ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k, 452 Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k, 453 ciKlass* callee_signature_k); 454 void profile_arguments(ProfileCall* x); 455 void profile_parameters(Base* x); 456 void profile_parameters_at_call(ProfileCall* x); 457 LIR_Opr maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info); 458 459 public: 460 Compilation* compilation() const { return _compilation; } 461 FrameMap* frame_map() const { return _compilation->frame_map(); } 462 ciMethod* method() const { return _method; } 463 BlockBegin* block() const { return _block; } 464 IRScope* scope() const { return block()->scope(); } 465 466 int max_virtual_register_number() const { return _virtual_register_number; } 467 468 void block_do(BlockBegin* block); 469 470 // Flags that can be set on vregs 471 enum VregFlag { 472 must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register 473 , callee_saved = 1 // must be in a callee saved register 474 , byte_reg = 2 // must be in a byte register 475 , num_vreg_flags 476 477 }; 478 479 LIRGenerator(Compilation* compilation, ciMethod* method) 480 : _compilation(compilation) 481 , _method(method) 482 , _virtual_register_number(LIR_OprDesc::vreg_base) 483 , _vreg_flags(NULL, 0, num_vreg_flags) { 484 init(); 485 } 486 487 // for virtual registers, maps them back to Phi's or Local's 488 Instruction* instruction_for_opr(LIR_Opr opr); 489 Instruction* instruction_for_vreg(int reg_num); 490 491 void set_vreg_flag (int vreg_num, VregFlag f); 492 bool is_vreg_flag_set(int vreg_num, VregFlag f); 493 void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); } 494 bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); } 495 496 // statics 497 static LIR_Opr exceptionOopOpr(); 498 static LIR_Opr exceptionPcOpr(); 499 static LIR_Opr divInOpr(); 500 static LIR_Opr divOutOpr(); 501 static LIR_Opr remOutOpr(); 502 static LIR_Opr shiftCountOpr(); 503 LIR_Opr syncTempOpr(); 504 LIR_Opr atomicLockOpr(); 505 506 // returns a register suitable for saving the thread in a 507 // call_runtime_leaf if one is needed. 508 LIR_Opr getThreadTemp(); 509 510 // visitor functionality 511 virtual void do_Phi (Phi* x); 512 virtual void do_Local (Local* x); 513 virtual void do_Constant (Constant* x); 514 virtual void do_LoadField (LoadField* x); 515 virtual void do_StoreField (StoreField* x); 516 virtual void do_ArrayLength (ArrayLength* x); 517 virtual void do_LoadIndexed (LoadIndexed* x); 518 virtual void do_StoreIndexed (StoreIndexed* x); 519 virtual void do_NegateOp (NegateOp* x); 520 virtual void do_ArithmeticOp (ArithmeticOp* x); 521 virtual void do_ShiftOp (ShiftOp* x); 522 virtual void do_LogicOp (LogicOp* x); 523 virtual void do_CompareOp (CompareOp* x); 524 virtual void do_IfOp (IfOp* x); 525 virtual void do_Convert (Convert* x); 526 virtual void do_NullCheck (NullCheck* x); 527 virtual void do_TypeCast (TypeCast* x); 528 virtual void do_Invoke (Invoke* x); 529 virtual void do_NewInstance (NewInstance* x); 530 virtual void do_NewTypeArray (NewTypeArray* x); 531 virtual void do_NewObjectArray (NewObjectArray* x); 532 virtual void do_NewMultiArray (NewMultiArray* x); 533 virtual void do_CheckCast (CheckCast* x); 534 virtual void do_InstanceOf (InstanceOf* x); 535 virtual void do_MonitorEnter (MonitorEnter* x); 536 virtual void do_MonitorExit (MonitorExit* x); 537 virtual void do_Intrinsic (Intrinsic* x); 538 virtual void do_BlockBegin (BlockBegin* x); 539 virtual void do_Goto (Goto* x); 540 virtual void do_If (If* x); 541 virtual void do_IfInstanceOf (IfInstanceOf* x); 542 virtual void do_TableSwitch (TableSwitch* x); 543 virtual void do_LookupSwitch (LookupSwitch* x); 544 virtual void do_Return (Return* x); 545 virtual void do_Throw (Throw* x); 546 virtual void do_Base (Base* x); 547 virtual void do_OsrEntry (OsrEntry* x); 548 virtual void do_ExceptionObject(ExceptionObject* x); 549 virtual void do_RoundFP (RoundFP* x); 550 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x); 551 virtual void do_UnsafePutRaw (UnsafePutRaw* x); 552 virtual void do_UnsafeGetObject(UnsafeGetObject* x); 553 virtual void do_UnsafePutObject(UnsafePutObject* x); 554 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x); 555 virtual void do_UnsafePrefetchRead (UnsafePrefetchRead* x); 556 virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x); 557 virtual void do_ProfileCall (ProfileCall* x); 558 virtual void do_ProfileReturnType (ProfileReturnType* x); 559 virtual void do_ProfileInvoke (ProfileInvoke* x); 560 virtual void do_RuntimeCall (RuntimeCall* x); 561 virtual void do_MemBar (MemBar* x); 562 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x); 563 #ifdef ASSERT 564 virtual void do_Assert (Assert* x); 565 #endif 566 567 #ifdef C1_LIRGENERATOR_MD_HPP 568 #include C1_LIRGENERATOR_MD_HPP 569 #endif 570 }; 571 572 573 class LIRItem: public CompilationResourceObj { 574 private: 575 Value _value; 576 LIRGenerator* _gen; 577 LIR_Opr _result; 578 bool _destroys_register; 579 LIR_Opr _new_result; 580 581 LIRGenerator* gen() const { return _gen; } 582 583 public: 584 LIRItem(Value value, LIRGenerator* gen) { 585 _destroys_register = false; 586 _gen = gen; 587 set_instruction(value); 588 } 589 590 LIRItem(LIRGenerator* gen) { 591 _destroys_register = false; 592 _gen = gen; 593 _result = LIR_OprFact::illegalOpr; 594 set_instruction(NULL); 595 } 596 597 void set_instruction(Value value) { 598 _value = value; 599 _result = LIR_OprFact::illegalOpr; 600 if (_value != NULL) { 601 _gen->walk(_value); 602 _result = _value->operand(); 603 } 604 _new_result = LIR_OprFact::illegalOpr; 605 } 606 607 Value value() const { return _value; } 608 ValueType* type() const { return value()->type(); } 609 LIR_Opr result() { 610 assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()), 611 "shouldn't use set_destroys_register with physical regsiters"); 612 if (_destroys_register && _result->is_register()) { 613 if (_new_result->is_illegal()) { 614 _new_result = _gen->new_register(type()); 615 gen()->lir()->move(_result, _new_result); 616 } 617 return _new_result; 618 } else { 619 return _result; 620 } 621 return _result; 622 } 623 624 void set_result(LIR_Opr opr); 625 626 void load_item(); 627 void load_byte_item(); 628 void load_nonconstant(); 629 // load any values which can't be expressed as part of a single store instruction 630 void load_for_store(BasicType store_type); 631 void load_item_force(LIR_Opr reg); 632 633 void dont_load_item() { 634 // do nothing 635 } 636 637 void set_destroys_register() { 638 _destroys_register = true; 639 } 640 641 bool is_constant() const { return value()->as_Constant() != NULL; } 642 bool is_stack() { return result()->is_stack(); } 643 bool is_register() { return result()->is_register(); } 644 645 ciObject* get_jobject_constant() const; 646 jint get_jint_constant() const; 647 jlong get_jlong_constant() const; 648 jfloat get_jfloat_constant() const; 649 jdouble get_jdouble_constant() const; 650 jint get_address_constant() const; 651 }; 652 653 #endif // SHARE_VM_C1_C1_LIRGENERATOR_HPP