1 /* 2 * Copyright (c) 2005, 2020, 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_C1_C1_LIRGENERATOR_HPP 26 #define SHARE_C1_C1_LIRGENERATOR_HPP 27 28 #include "c1/c1_Decorators.hpp" 29 #include "c1/c1_Instruction.hpp" 30 #include "c1/c1_LIR.hpp" 31 #include "ci/ciMethodData.hpp" 32 #include "gc/shared/barrierSet.hpp" 33 #include "jfr/support/jfrIntrinsics.hpp" 34 #include "utilities/macros.hpp" 35 #include "utilities/sizes.hpp" 36 37 class BarrierSetC1; 38 39 // The classes responsible for code emission and register allocation 40 41 42 class LIRGenerator; 43 class LIREmitter; 44 class Invoke; 45 class LIRItem; 46 47 typedef GrowableArray<LIRItem*> LIRItemList; 48 49 class C1SwitchRange: public CompilationResourceObj { 50 private: 51 int _low_key; 52 int _high_key; 53 BlockBegin* _sux; 54 public: C1SwitchRange(int start_key,BlockBegin * sux)55 C1SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {} set_high_key(int key)56 void set_high_key(int key) { _high_key = key; } 57 high_key() const58 int high_key() const { return _high_key; } low_key() const59 int low_key() const { return _low_key; } sux() const60 BlockBegin* sux() const { return _sux; } 61 }; 62 63 typedef GrowableArray<C1SwitchRange*> SwitchRangeArray; 64 typedef GrowableArray<C1SwitchRange*> SwitchRangeList; 65 66 class ResolveNode; 67 68 typedef GrowableArray<ResolveNode*> NodeList; 69 70 // Node objects form a directed graph of LIR_Opr 71 // Edges between Nodes represent moves from one Node to its destinations 72 class ResolveNode: public CompilationResourceObj { 73 private: 74 LIR_Opr _operand; // the source or destinaton 75 NodeList _destinations; // for the operand 76 bool _assigned; // Value assigned to this Node? 77 bool _visited; // Node already visited? 78 bool _start_node; // Start node already visited? 79 80 public: ResolveNode(LIR_Opr operand)81 ResolveNode(LIR_Opr operand) 82 : _operand(operand) 83 , _assigned(false) 84 , _visited(false) 85 , _start_node(false) {}; 86 87 // accessors operand() const88 LIR_Opr operand() const { return _operand; } no_of_destinations() const89 int no_of_destinations() const { return _destinations.length(); } destination_at(int i)90 ResolveNode* destination_at(int i) { return _destinations.at(i); } assigned() const91 bool assigned() const { return _assigned; } visited() const92 bool visited() const { return _visited; } start_node() const93 bool start_node() const { return _start_node; } 94 95 // modifiers append(ResolveNode * dest)96 void append(ResolveNode* dest) { _destinations.append(dest); } set_assigned()97 void set_assigned() { _assigned = true; } set_visited()98 void set_visited() { _visited = true; } set_start_node()99 void set_start_node() { _start_node = true; } 100 }; 101 102 103 // This is shared state to be used by the PhiResolver so the operand 104 // arrays don't have to be reallocated for each resolution. 105 class PhiResolverState: public CompilationResourceObj { 106 friend class PhiResolver; 107 108 private: 109 NodeList _virtual_operands; // Nodes where the operand is a virtual register 110 NodeList _other_operands; // Nodes where the operand is not a virtual register 111 NodeList _vreg_table; // Mapping from virtual register to Node 112 113 public: PhiResolverState()114 PhiResolverState() {} 115 116 void reset(); 117 }; 118 119 120 // class used to move value of phi operand to phi function 121 class PhiResolver: public CompilationResourceObj { 122 private: 123 LIRGenerator* _gen; 124 PhiResolverState& _state; // temporary state cached by LIRGenerator 125 126 ResolveNode* _loop; 127 LIR_Opr _temp; 128 129 // access to shared state arrays virtual_operands()130 NodeList& virtual_operands() { return _state._virtual_operands; } other_operands()131 NodeList& other_operands() { return _state._other_operands; } vreg_table()132 NodeList& vreg_table() { return _state._vreg_table; } 133 134 ResolveNode* create_node(LIR_Opr opr, bool source); source_node(LIR_Opr opr)135 ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); } destination_node(LIR_Opr opr)136 ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); } 137 138 void emit_move(LIR_Opr src, LIR_Opr dest); 139 void move_to_temp(LIR_Opr src); 140 void move_temp_to(LIR_Opr dest); 141 void move(ResolveNode* src, ResolveNode* dest); 142 gen()143 LIRGenerator* gen() { 144 return _gen; 145 } 146 147 public: 148 PhiResolver(LIRGenerator* _lir_gen); 149 ~PhiResolver(); 150 151 void move(LIR_Opr src, LIR_Opr dest); 152 }; 153 154 155 // only the classes below belong in the same file 156 class LIRGenerator: public InstructionVisitor, public BlockClosure { 157 // LIRGenerator should never get instatiated on the heap. 158 private: 159 void* operator new(size_t size) throw(); 160 void* operator new[](size_t size) throw(); operator delete(void * p)161 void operator delete(void* p) { ShouldNotReachHere(); } operator delete[](void * p)162 void operator delete[](void* p) { ShouldNotReachHere(); } 163 164 Compilation* _compilation; 165 ciMethod* _method; // method that we are compiling 166 PhiResolverState _resolver_state; 167 BlockBegin* _block; 168 int _virtual_register_number; 169 Values _instruction_for_operand; 170 BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis 171 LIR_List* _lir; 172 gen()173 LIRGenerator* gen() { 174 return this; 175 } 176 177 void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN; 178 179 public: 180 #ifdef ASSERT lir(const char * file,int line) const181 LIR_List* lir(const char * file, int line) const { 182 _lir->set_file_and_line(file, line); 183 return _lir; 184 } 185 #endif lir() const186 LIR_List* lir() const { 187 return _lir; 188 } 189 190 private: 191 // a simple cache of constants used within a block 192 GrowableArray<LIR_Const*> _constants; 193 LIR_OprList _reg_for_constants; 194 Values _unpinned_constants; 195 196 friend class PhiResolver; 197 198 public: 199 // unified bailout support bailout(const char * msg) const200 void bailout(const char* msg) const { compilation()->bailout(msg); } bailed_out() const201 bool bailed_out() const { return compilation()->bailed_out(); } 202 203 void block_do_prolog(BlockBegin* block); 204 void block_do_epilog(BlockBegin* block); 205 206 // register allocation 207 LIR_Opr rlock(Value instr); // lock a free register 208 LIR_Opr rlock_result(Value instr); 209 LIR_Opr rlock_result(Value instr, BasicType type); 210 LIR_Opr rlock_byte(BasicType type); 211 LIR_Opr rlock_callee_saved(BasicType type); 212 213 // get a constant into a register and get track of what register was used 214 LIR_Opr load_constant(Constant* x); 215 LIR_Opr load_constant(LIR_Const* constant); 216 217 // Given an immediate value, return an operand usable in logical ops. 218 LIR_Opr load_immediate(int x, BasicType type); 219 set_result(Value x,LIR_Opr opr)220 void set_result(Value x, LIR_Opr opr) { 221 assert(opr->is_valid(), "must set to valid value"); 222 assert(x->operand()->is_illegal(), "operand should never change"); 223 assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register"); 224 x->set_operand(opr); 225 assert(opr == x->operand(), "must be"); 226 if (opr->is_virtual()) { 227 _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL); 228 } 229 } set_no_result(Value x)230 void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); } 231 232 friend class LIRItem; 233 234 LIR_Opr round_item(LIR_Opr opr); 235 LIR_Opr force_to_spill(LIR_Opr value, BasicType t); 236 resolver_state()237 PhiResolverState& resolver_state() { return _resolver_state; } 238 239 void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val); 240 void move_to_phi(ValueStack* cur_state); 241 242 // platform dependent 243 LIR_Opr getThreadPointer(); 244 245 private: 246 // code emission 247 void do_ArithmeticOp_Long(ArithmeticOp* x); 248 void do_ArithmeticOp_Int (ArithmeticOp* x); 249 void do_ArithmeticOp_FPU (ArithmeticOp* x); 250 251 void do_RegisterFinalizer(Intrinsic* x); 252 void do_isInstance(Intrinsic* x); 253 void do_isPrimitive(Intrinsic* x); 254 void do_getClass(Intrinsic* x); 255 void do_currentThread(Intrinsic* x); 256 void do_FmaIntrinsic(Intrinsic* x); 257 void do_MathIntrinsic(Intrinsic* x); 258 void do_LibmIntrinsic(Intrinsic* x); 259 void do_ArrayCopy(Intrinsic* x); 260 void do_CompareAndSwap(Intrinsic* x, ValueType* type); 261 void do_NIOCheckIndex(Intrinsic* x); 262 void do_FPIntrinsics(Intrinsic* x); 263 void do_Reference_get(Intrinsic* x); 264 void do_update_CRC32(Intrinsic* x); 265 void do_update_CRC32C(Intrinsic* x); 266 void do_vectorizedMismatch(Intrinsic* x); 267 268 public: 269 LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info); 270 LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info); 271 272 // convenience functions 273 LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info); 274 LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info); 275 276 // Access API 277 278 private: 279 BarrierSetC1 *_barrier_set; 280 281 public: 282 void access_store_at(DecoratorSet decorators, BasicType type, 283 LIRItem& base, LIR_Opr offset, LIR_Opr value, 284 CodeEmitInfo* patch_info = NULL, CodeEmitInfo* store_emit_info = NULL); 285 286 void access_load_at(DecoratorSet decorators, BasicType type, 287 LIRItem& base, LIR_Opr offset, LIR_Opr result, 288 CodeEmitInfo* patch_info = NULL, CodeEmitInfo* load_emit_info = NULL); 289 290 void access_load(DecoratorSet decorators, BasicType type, 291 LIR_Opr addr, LIR_Opr result); 292 293 LIR_Opr access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type, 294 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value); 295 296 LIR_Opr access_atomic_xchg_at(DecoratorSet decorators, BasicType type, 297 LIRItem& base, LIRItem& offset, LIRItem& value); 298 299 LIR_Opr access_atomic_add_at(DecoratorSet decorators, BasicType type, 300 LIRItem& base, LIRItem& offset, LIRItem& value); 301 302 LIR_Opr access_resolve(DecoratorSet decorators, LIR_Opr obj); 303 304 // These need to guarantee JMM volatile semantics are preserved on each platform 305 // and requires one implementation per architecture. 306 LIR_Opr atomic_cmpxchg(BasicType type, LIR_Opr addr, LIRItem& cmp_value, LIRItem& new_value); 307 LIR_Opr atomic_xchg(BasicType type, LIR_Opr addr, LIRItem& new_value); 308 LIR_Opr atomic_add(BasicType type, LIR_Opr addr, LIRItem& new_value); 309 310 #ifdef CARDTABLEBARRIERSET_POST_BARRIER_HELPER 311 virtual void CardTableBarrierSet_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base); 312 #endif 313 314 // specific implementations 315 void array_store_check(LIR_Opr value, LIR_Opr array, CodeEmitInfo* store_check_info, ciMethod* profiled_method, int profiled_bci); 316 317 static LIR_Opr result_register_for(ValueType* type, bool callee = false); 318 319 ciObject* get_jobject_constant(Value value); 320 321 LIRItemList* invoke_visit_arguments(Invoke* x); 322 void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list); 323 324 void trace_block_entry(BlockBegin* block); 325 326 // volatile field operations are never patchable because a klass 327 // must be loaded to know it's volatile which means that the offset 328 // it always known as well. 329 void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info); 330 void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info); 331 332 void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile); 333 void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile); 334 335 void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args); 336 337 void increment_counter(address counter, BasicType type, int step = 1); 338 void increment_counter(LIR_Address* addr, int step = 1); 339 340 // is_strictfp is only needed for mul and div (and only generates different code on i486) 341 void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL); 342 // machine dependent. returns true if it emitted code for the multiply 343 bool strength_reduce_multiply(LIR_Opr left, jint constant, LIR_Opr result, LIR_Opr tmp); 344 345 void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes); 346 347 void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false); 348 349 // this loads the length and compares against the index 350 void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info); 351 // For java.nio.Buffer.checkIndex 352 void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info); 353 354 void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp); 355 void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL); 356 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); 357 358 void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp); 359 360 void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right); 361 362 void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info); 363 void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no); 364 365 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); 366 367 // machine dependent 368 void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info); 369 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info); 370 371 void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type); 372 373 // returns a LIR_Address to address an array location. May also 374 // emit some code as part of address calculation. If 375 // needs_card_mark is true then compute the full address for use by 376 // both the store and the card mark. 377 LIR_Address* generate_address(LIR_Opr base, 378 LIR_Opr index, int shift, 379 int disp, 380 BasicType type); generate_address(LIR_Opr base,int disp,BasicType type)381 LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) { 382 return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type); 383 } 384 LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type); 385 386 // the helper for generate_address 387 void add_large_constant(LIR_Opr src, int c, LIR_Opr dest); 388 389 // machine preferences and characteristics 390 bool can_inline_as_constant(Value i S390_ONLY(COMMA int bits = 20)) const; 391 bool can_inline_as_constant(LIR_Const* c) const; 392 bool can_store_as_constant(Value i, BasicType type) const; 393 394 LIR_Opr safepoint_poll_register(); 395 396 void profile_branch(If* if_instr, If::Condition cond); 397 void increment_event_counter_impl(CodeEmitInfo* info, 398 ciMethod *method, LIR_Opr step, int frequency, 399 int bci, bool backedge, bool notify); 400 void increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge); increment_invocation_counter(CodeEmitInfo * info)401 void increment_invocation_counter(CodeEmitInfo *info) { 402 if (compilation()->count_invocations()) { 403 increment_event_counter(info, LIR_OprFact::intConst(InvocationCounter::count_increment), InvocationEntryBci, false); 404 } 405 } increment_backedge_counter(CodeEmitInfo * info,int bci)406 void increment_backedge_counter(CodeEmitInfo* info, int bci) { 407 if (compilation()->count_backedges()) { 408 increment_event_counter(info, LIR_OprFact::intConst(InvocationCounter::count_increment), bci, true); 409 } 410 } 411 void increment_backedge_counter_conditionally(LIR_Condition cond, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info, int left_bci, int right_bci, int bci); increment_backedge_counter(CodeEmitInfo * info,LIR_Opr step,int bci)412 void increment_backedge_counter(CodeEmitInfo* info, LIR_Opr step, int bci) { 413 if (compilation()->count_backedges()) { 414 increment_event_counter(info, step, bci, true); 415 } 416 } 417 void decrement_age(CodeEmitInfo* info); 418 CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false); 419 CodeEmitInfo* state_for(Instruction* x); 420 421 // allocates a virtual register for this instruction if 422 // one isn't already allocated. Only for Phi and Local. 423 LIR_Opr operand_for_instruction(Instruction *x); 424 set_block(BlockBegin * block)425 void set_block(BlockBegin* block) { _block = block; } 426 427 void block_prolog(BlockBegin* block); 428 void block_epilog(BlockBegin* block); 429 430 void do_root (Instruction* instr); 431 void walk (Instruction* instr); 432 433 void bind_block_entry(BlockBegin* block); 434 void start_block(BlockBegin* block); 435 436 LIR_Opr new_register(BasicType type); new_register(Value value)437 LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); } new_register(ValueType * type)438 LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); } 439 440 // returns a register suitable for doing pointer math new_pointer_register()441 LIR_Opr new_pointer_register() { 442 #ifdef _LP64 443 return new_register(T_LONG); 444 #else 445 return new_register(T_INT); 446 #endif 447 } 448 lir_cond(If::Condition cond)449 static LIR_Condition lir_cond(If::Condition cond) { 450 LIR_Condition l = lir_cond_unknown; 451 switch (cond) { 452 case If::eql: l = lir_cond_equal; break; 453 case If::neq: l = lir_cond_notEqual; break; 454 case If::lss: l = lir_cond_less; break; 455 case If::leq: l = lir_cond_lessEqual; break; 456 case If::geq: l = lir_cond_greaterEqual; break; 457 case If::gtr: l = lir_cond_greater; break; 458 case If::aeq: l = lir_cond_aboveEqual; break; 459 case If::beq: l = lir_cond_belowEqual; break; 460 default: fatal("You must pass valid If::Condition"); 461 }; 462 return l; 463 } 464 465 #ifdef __SOFTFP__ 466 void do_soft_float_compare(If *x); 467 #endif // __SOFTFP__ 468 469 SwitchRangeArray* create_lookup_ranges(TableSwitch* x); 470 SwitchRangeArray* create_lookup_ranges(LookupSwitch* x); 471 void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux); 472 473 #ifdef JFR_HAVE_INTRINSICS 474 void do_ClassIDIntrinsic(Intrinsic* x); 475 void do_getEventWriter(Intrinsic* x); 476 #endif 477 478 void do_RuntimeCall(address routine, Intrinsic* x); 479 480 ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k, 481 Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k, 482 ciKlass* callee_signature_k); 483 void profile_arguments(ProfileCall* x); 484 void profile_parameters(Base* x); 485 void profile_parameters_at_call(ProfileCall* x); 486 LIR_Opr mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info); 487 LIR_Opr maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info); 488 489 public: compilation() const490 Compilation* compilation() const { return _compilation; } frame_map() const491 FrameMap* frame_map() const { return _compilation->frame_map(); } method() const492 ciMethod* method() const { return _method; } block() const493 BlockBegin* block() const { return _block; } scope() const494 IRScope* scope() const { return block()->scope(); } 495 max_virtual_register_number() const496 int max_virtual_register_number() const { return _virtual_register_number; } 497 498 void block_do(BlockBegin* block); 499 500 // Flags that can be set on vregs 501 enum VregFlag { 502 must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register 503 , callee_saved = 1 // must be in a callee saved register 504 , byte_reg = 2 // must be in a byte register 505 , num_vreg_flags 506 507 }; 508 LIRGenerator(Compilation * compilation,ciMethod * method)509 LIRGenerator(Compilation* compilation, ciMethod* method) 510 : _compilation(compilation) 511 , _method(method) 512 , _virtual_register_number(LIR_OprDesc::vreg_base) 513 , _vreg_flags(num_vreg_flags) 514 , _barrier_set(BarrierSet::barrier_set()->barrier_set_c1()) { 515 } 516 517 // for virtual registers, maps them back to Phi's or Local's 518 Instruction* instruction_for_opr(LIR_Opr opr); 519 Instruction* instruction_for_vreg(int reg_num); 520 521 void set_vreg_flag (int vreg_num, VregFlag f); 522 bool is_vreg_flag_set(int vreg_num, VregFlag f); set_vreg_flag(LIR_Opr opr,VregFlag f)523 void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); } is_vreg_flag_set(LIR_Opr opr,VregFlag f)524 bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); } 525 526 // statics 527 static LIR_Opr exceptionOopOpr(); 528 static LIR_Opr exceptionPcOpr(); 529 static LIR_Opr divInOpr(); 530 static LIR_Opr divOutOpr(); 531 static LIR_Opr remOutOpr(); 532 #ifdef S390 533 // On S390 we can do ldiv, lrem without RT call. 534 static LIR_Opr ldivInOpr(); 535 static LIR_Opr ldivOutOpr(); 536 static LIR_Opr lremOutOpr(); 537 #endif 538 static LIR_Opr shiftCountOpr(); 539 LIR_Opr syncLockOpr(); 540 LIR_Opr syncTempOpr(); 541 LIR_Opr atomicLockOpr(); 542 543 // returns a register suitable for saving the thread in a 544 // call_runtime_leaf if one is needed. 545 LIR_Opr getThreadTemp(); 546 547 // visitor functionality 548 virtual void do_Phi (Phi* x); 549 virtual void do_Local (Local* x); 550 virtual void do_Constant (Constant* x); 551 virtual void do_LoadField (LoadField* x); 552 virtual void do_StoreField (StoreField* x); 553 virtual void do_ArrayLength (ArrayLength* x); 554 virtual void do_LoadIndexed (LoadIndexed* x); 555 virtual void do_StoreIndexed (StoreIndexed* x); 556 virtual void do_NegateOp (NegateOp* x); 557 virtual void do_ArithmeticOp (ArithmeticOp* x); 558 virtual void do_ShiftOp (ShiftOp* x); 559 virtual void do_LogicOp (LogicOp* x); 560 virtual void do_CompareOp (CompareOp* x); 561 virtual void do_IfOp (IfOp* x); 562 virtual void do_Convert (Convert* x); 563 virtual void do_NullCheck (NullCheck* x); 564 virtual void do_TypeCast (TypeCast* x); 565 virtual void do_Invoke (Invoke* x); 566 virtual void do_NewInstance (NewInstance* x); 567 virtual void do_NewTypeArray (NewTypeArray* x); 568 virtual void do_NewObjectArray (NewObjectArray* x); 569 virtual void do_NewMultiArray (NewMultiArray* x); 570 virtual void do_CheckCast (CheckCast* x); 571 virtual void do_InstanceOf (InstanceOf* x); 572 virtual void do_MonitorEnter (MonitorEnter* x); 573 virtual void do_MonitorExit (MonitorExit* x); 574 virtual void do_Intrinsic (Intrinsic* x); 575 virtual void do_BlockBegin (BlockBegin* x); 576 virtual void do_Goto (Goto* x); 577 virtual void do_If (If* x); 578 virtual void do_IfInstanceOf (IfInstanceOf* x); 579 virtual void do_TableSwitch (TableSwitch* x); 580 virtual void do_LookupSwitch (LookupSwitch* x); 581 virtual void do_Return (Return* x); 582 virtual void do_Throw (Throw* x); 583 virtual void do_Base (Base* x); 584 virtual void do_OsrEntry (OsrEntry* x); 585 virtual void do_ExceptionObject(ExceptionObject* x); 586 virtual void do_RoundFP (RoundFP* x); 587 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x); 588 virtual void do_UnsafePutRaw (UnsafePutRaw* x); 589 virtual void do_UnsafeGetObject(UnsafeGetObject* x); 590 virtual void do_UnsafePutObject(UnsafePutObject* x); 591 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x); 592 virtual void do_ProfileCall (ProfileCall* x); 593 virtual void do_ProfileReturnType (ProfileReturnType* x); 594 virtual void do_ProfileInvoke (ProfileInvoke* x); 595 virtual void do_RuntimeCall (RuntimeCall* x); 596 virtual void do_MemBar (MemBar* x); 597 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x); 598 #ifdef ASSERT 599 virtual void do_Assert (Assert* x); 600 #endif 601 602 #ifdef C1_LIRGENERATOR_MD_HPP 603 #include C1_LIRGENERATOR_MD_HPP 604 #endif 605 }; 606 607 608 class LIRItem: public CompilationResourceObj { 609 private: 610 Value _value; 611 LIRGenerator* _gen; 612 LIR_Opr _result; 613 bool _destroys_register; 614 LIR_Opr _new_result; 615 gen() const616 LIRGenerator* gen() const { return _gen; } 617 618 public: LIRItem(Value value,LIRGenerator * gen)619 LIRItem(Value value, LIRGenerator* gen) { 620 _destroys_register = false; 621 _gen = gen; 622 set_instruction(value); 623 } 624 LIRItem(LIRGenerator * gen)625 LIRItem(LIRGenerator* gen) { 626 _destroys_register = false; 627 _gen = gen; 628 _result = LIR_OprFact::illegalOpr; 629 set_instruction(NULL); 630 } 631 set_instruction(Value value)632 void set_instruction(Value value) { 633 _value = value; 634 _result = LIR_OprFact::illegalOpr; 635 if (_value != NULL) { 636 _gen->walk(_value); 637 _result = _value->operand(); 638 } 639 _new_result = LIR_OprFact::illegalOpr; 640 } 641 value() const642 Value value() const { return _value; } type() const643 ValueType* type() const { return value()->type(); } result()644 LIR_Opr result() { 645 assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()), 646 "shouldn't use set_destroys_register with physical regsiters"); 647 if (_destroys_register && _result->is_register()) { 648 if (_new_result->is_illegal()) { 649 _new_result = _gen->new_register(type()); 650 gen()->lir()->move(_result, _new_result); 651 } 652 return _new_result; 653 } else { 654 return _result; 655 } 656 return _result; 657 } 658 659 void set_result(LIR_Opr opr); 660 661 void load_item(); 662 void load_byte_item(); 663 void load_nonconstant(S390_ONLY(int bits = 20)); 664 // load any values which can't be expressed as part of a single store instruction 665 void load_for_store(BasicType store_type); 666 void load_item_force(LIR_Opr reg); 667 dont_load_item()668 void dont_load_item() { 669 // do nothing 670 } 671 set_destroys_register()672 void set_destroys_register() { 673 _destroys_register = true; 674 } 675 is_constant() const676 bool is_constant() const { return value()->as_Constant() != NULL; } is_stack()677 bool is_stack() { return result()->is_stack(); } is_register()678 bool is_register() { return result()->is_register(); } 679 680 ciObject* get_jobject_constant() const; 681 jint get_jint_constant() const; 682 jlong get_jlong_constant() const; 683 jfloat get_jfloat_constant() const; 684 jdouble get_jdouble_constant() const; 685 jint get_address_constant() const; 686 }; 687 688 #endif // SHARE_C1_C1_LIRGENERATOR_HPP 689