1 /*
2 * Copyright (c) 2005, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_Instruction.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_LIRGenerator.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "ci/ciObjArray.hpp"
36 #include "ci/ciUtilities.hpp"
37 #include "code/SCCache.hpp"
38 #include "compiler/compilerDefinitions.inline.hpp"
39 #include "compiler/compilerOracle.hpp"
40 #include "gc/shared/barrierSet.hpp"
41 #include "gc/shared/c1/barrierSetC1.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/methodCounters.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/vm_version.hpp"
47 #include "utilities/bitMap.inline.hpp"
48 #include "utilities/macros.hpp"
49 #include "utilities/powerOfTwo.hpp"
50
51 #ifdef ASSERT
52 #define __ gen()->lir(__FILE__, __LINE__)->
53 #else
54 #define __ gen()->lir()->
55 #endif
56
57 #ifndef PATCHED_ADDR
58 #define PATCHED_ADDR (max_jint)
59 #endif
60
61 void PhiResolverState::reset() {
62 _virtual_operands.clear();
63 _other_operands.clear();
64 _vreg_table.clear();
65 }
66
67
68 //--------------------------------------------------------------
69 // PhiResolver
70
71 // Resolves cycles:
72 //
73 // r1 := r2 becomes temp := r1
74 // r2 := r1 r1 := r2
75 // r2 := temp
76 // and orders moves:
77 //
78 // r2 := r3 becomes r1 := r2
79 // r1 := r2 r2 := r3
80
81 PhiResolver::PhiResolver(LIRGenerator* gen)
82 : _gen(gen)
83 , _state(gen->resolver_state())
84 , _loop(nullptr)
85 , _temp(LIR_OprFact::illegalOpr)
86 {
87 // reinitialize the shared state arrays
88 _state.reset();
89 }
90
91
92 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
93 assert(src->is_valid(), "");
94 assert(dest->is_valid(), "");
95 __ move(src, dest);
96 }
97
98
99 void PhiResolver::move_temp_to(LIR_Opr dest) {
100 assert(_temp->is_valid(), "");
101 emit_move(_temp, dest);
102 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
103 }
104
105
106 void PhiResolver::move_to_temp(LIR_Opr src) {
107 assert(_temp->is_illegal(), "");
108 _temp = _gen->new_register(src->type());
109 emit_move(src, _temp);
110 }
111
112
113 // Traverse assignment graph in depth first order and generate moves in post order
114 // ie. two assignments: b := c, a := b start with node c:
115 // Call graph: move(null, c) -> move(c, b) -> move(b, a)
116 // Generates moves in this order: move b to a and move c to b
117 // ie. cycle a := b, b := a start with node a
118 // Call graph: move(null, a) -> move(a, b) -> move(b, a)
119 // Generates moves in this order: move b to temp, move a to b, move temp to a
120 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
121 if (!dest->visited()) {
122 dest->set_visited();
123 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
124 move(dest, dest->destination_at(i));
125 }
126 } else if (!dest->start_node()) {
127 // cylce in graph detected
128 assert(_loop == nullptr, "only one loop valid!");
129 _loop = dest;
130 move_to_temp(src->operand());
131 return;
132 } // else dest is a start node
133
134 if (!dest->assigned()) {
135 if (_loop == dest) {
136 move_temp_to(dest->operand());
137 dest->set_assigned();
138 } else if (src != nullptr) {
139 emit_move(src->operand(), dest->operand());
140 dest->set_assigned();
141 }
142 }
143 }
144
145
146 PhiResolver::~PhiResolver() {
147 int i;
148 // resolve any cycles in moves from and to virtual registers
149 for (i = virtual_operands().length() - 1; i >= 0; i --) {
150 ResolveNode* node = virtual_operands().at(i);
151 if (!node->visited()) {
152 _loop = nullptr;
153 move(nullptr, node);
154 node->set_start_node();
155 assert(_temp->is_illegal(), "move_temp_to() call missing");
156 }
157 }
158
159 // generate move for move from non virtual register to abitrary destination
160 for (i = other_operands().length() - 1; i >= 0; i --) {
161 ResolveNode* node = other_operands().at(i);
162 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
163 emit_move(node->operand(), node->destination_at(j)->operand());
164 }
165 }
166 }
167
168
169 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
170 ResolveNode* node;
171 if (opr->is_virtual()) {
172 int vreg_num = opr->vreg_number();
173 node = vreg_table().at_grow(vreg_num, nullptr);
174 assert(node == nullptr || node->operand() == opr, "");
175 if (node == nullptr) {
176 node = new ResolveNode(opr);
177 vreg_table().at_put(vreg_num, node);
178 }
179 // Make sure that all virtual operands show up in the list when
180 // they are used as the source of a move.
181 if (source && !virtual_operands().contains(node)) {
182 virtual_operands().append(node);
183 }
184 } else {
185 assert(source, "");
186 node = new ResolveNode(opr);
187 other_operands().append(node);
188 }
189 return node;
190 }
191
192
193 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
194 assert(dest->is_virtual(), "");
195 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
196 assert(src->is_valid(), "");
197 assert(dest->is_valid(), "");
198 ResolveNode* source = source_node(src);
199 source->append(destination_node(dest));
200 }
201
202
203 //--------------------------------------------------------------
204 // LIRItem
205
206 void LIRItem::set_result(LIR_Opr opr) {
207 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
208 value()->set_operand(opr);
209
210 #ifdef ASSERT
211 if (opr->is_virtual()) {
212 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), nullptr);
213 }
214 #endif
215
216 _result = opr;
217 }
218
219 void LIRItem::load_item() {
220 if (result()->is_illegal()) {
221 // update the items result
222 _result = value()->operand();
223 }
224 if (!result()->is_register()) {
225 LIR_Opr reg = _gen->new_register(value()->type());
226 __ move(result(), reg);
227 if (result()->is_constant()) {
228 _result = reg;
229 } else {
230 set_result(reg);
231 }
232 }
233 }
234
235
236 void LIRItem::load_for_store(BasicType type) {
237 if (_gen->can_store_as_constant(value(), type)) {
238 _result = value()->operand();
239 if (!_result->is_constant()) {
240 _result = LIR_OprFact::value_type(value()->type());
241 }
242 } else if (type == T_BYTE || type == T_BOOLEAN) {
243 load_byte_item();
244 } else {
245 load_item();
246 }
247 }
248
249 void LIRItem::load_item_force(LIR_Opr reg) {
250 LIR_Opr r = result();
251 if (r != reg) {
252 #if !defined(ARM) && !defined(E500V2)
253 if (r->type() != reg->type()) {
254 // moves between different types need an intervening spill slot
255 r = _gen->force_to_spill(r, reg->type());
256 }
257 #endif
258 __ move(r, reg);
259 _result = reg;
260 }
261 }
262
263 ciObject* LIRItem::get_jobject_constant() const {
264 ObjectType* oc = type()->as_ObjectType();
265 if (oc) {
266 return oc->constant_value();
267 }
268 return nullptr;
269 }
270
271
272 jint LIRItem::get_jint_constant() const {
273 assert(is_constant() && value() != nullptr, "");
274 assert(type()->as_IntConstant() != nullptr, "type check");
275 return type()->as_IntConstant()->value();
276 }
277
278
279 jint LIRItem::get_address_constant() const {
280 assert(is_constant() && value() != nullptr, "");
281 assert(type()->as_AddressConstant() != nullptr, "type check");
282 return type()->as_AddressConstant()->value();
283 }
284
285
286 jfloat LIRItem::get_jfloat_constant() const {
287 assert(is_constant() && value() != nullptr, "");
288 assert(type()->as_FloatConstant() != nullptr, "type check");
289 return type()->as_FloatConstant()->value();
290 }
291
292
293 jdouble LIRItem::get_jdouble_constant() const {
294 assert(is_constant() && value() != nullptr, "");
295 assert(type()->as_DoubleConstant() != nullptr, "type check");
296 return type()->as_DoubleConstant()->value();
297 }
298
299
300 jlong LIRItem::get_jlong_constant() const {
301 assert(is_constant() && value() != nullptr, "");
302 assert(type()->as_LongConstant() != nullptr, "type check");
303 return type()->as_LongConstant()->value();
304 }
305
306
307
308 //--------------------------------------------------------------
309
310
311 void LIRGenerator::block_do_prolog(BlockBegin* block) {
312 #ifndef PRODUCT
313 if (PrintIRWithLIR) {
314 block->print();
315 }
316 #endif
317
318 // set up the list of LIR instructions
319 assert(block->lir() == nullptr, "LIR list already computed for this block");
320 _lir = new LIR_List(compilation(), block);
321 block->set_lir(_lir);
322
323 __ branch_destination(block->label());
324
325 if (LIRTraceExecution &&
326 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
327 !block->is_set(BlockBegin::exception_entry_flag)) {
328 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
329 trace_block_entry(block);
330 }
331 }
332
333
334 void LIRGenerator::block_do_epilog(BlockBegin* block) {
335 #ifndef PRODUCT
336 if (PrintIRWithLIR) {
337 tty->cr();
338 }
339 #endif
340
341 // LIR_Opr for unpinned constants shouldn't be referenced by other
342 // blocks so clear them out after processing the block.
343 for (int i = 0; i < _unpinned_constants.length(); i++) {
344 _unpinned_constants.at(i)->clear_operand();
345 }
346 _unpinned_constants.trunc_to(0);
347
348 // clear our any registers for other local constants
349 _constants.trunc_to(0);
350 _reg_for_constants.trunc_to(0);
351 }
352
353
354 void LIRGenerator::block_do(BlockBegin* block) {
355 CHECK_BAILOUT();
356
357 block_do_prolog(block);
358 set_block(block);
359
360 for (Instruction* instr = block; instr != nullptr; instr = instr->next()) {
361 if (instr->is_pinned()) do_root(instr);
362 }
363
364 set_block(nullptr);
365 block_do_epilog(block);
366 }
367
368
369 //-------------------------LIRGenerator-----------------------------
370
371 // This is where the tree-walk starts; instr must be root;
372 void LIRGenerator::do_root(Value instr) {
373 CHECK_BAILOUT();
374
375 InstructionMark im(compilation(), instr);
376
377 assert(instr->is_pinned(), "use only with roots");
378 assert(instr->subst() == instr, "shouldn't have missed substitution");
379
380 instr->visit(this);
381
382 assert(!instr->has_uses() || instr->operand()->is_valid() ||
383 instr->as_Constant() != nullptr || bailed_out(), "invalid item set");
384 }
385
386
387 // This is called for each node in tree; the walk stops if a root is reached
388 void LIRGenerator::walk(Value instr) {
389 InstructionMark im(compilation(), instr);
390 //stop walk when encounter a root
391 if ((instr->is_pinned() && instr->as_Phi() == nullptr) || instr->operand()->is_valid()) {
392 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != nullptr, "this root has not yet been visited");
393 } else {
394 assert(instr->subst() == instr, "shouldn't have missed substitution");
395 instr->visit(this);
396 // assert(instr->use_count() > 0 || instr->as_Phi() != nullptr, "leaf instruction must have a use");
397 }
398 }
399
400
401 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
402 assert(state != nullptr, "state must be defined");
403
404 #ifndef PRODUCT
405 state->verify();
406 #endif
407
408 ValueStack* s = state;
409 for_each_state(s) {
410 if (s->kind() == ValueStack::EmptyExceptionState ||
411 s->kind() == ValueStack::CallerEmptyExceptionState)
412 {
413 #ifdef ASSERT
414 int index;
415 Value value;
416 for_each_stack_value(s, index, value) {
417 fatal("state must be empty");
418 }
419 for_each_local_value(s, index, value) {
420 fatal("state must be empty");
421 }
422 #endif
423 assert(s->locks_size() == 0 || s->locks_size() == 1, "state must be empty");
424 continue;
425 }
426
427 int index;
428 Value value;
429 for_each_stack_value(s, index, value) {
430 assert(value->subst() == value, "missed substitution");
431 if (!value->is_pinned() && value->as_Constant() == nullptr && value->as_Local() == nullptr) {
432 walk(value);
433 assert(value->operand()->is_valid(), "must be evaluated now");
434 }
435 }
436
437 int bci = s->bci();
438 IRScope* scope = s->scope();
439 ciMethod* method = scope->method();
440
441 MethodLivenessResult liveness = method->liveness_at_bci(bci);
442 if (bci == SynchronizationEntryBCI) {
443 if (x->as_ExceptionObject() || x->as_Throw()) {
444 // all locals are dead on exit from the synthetic unlocker
445 liveness.clear();
446 } else {
447 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
448 }
449 }
450 if (!liveness.is_valid()) {
451 // Degenerate or breakpointed method.
452 bailout("Degenerate or breakpointed method");
453 } else {
454 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
455 for_each_local_value(s, index, value) {
456 assert(value->subst() == value, "missed substitution");
457 if (liveness.at(index) && !value->type()->is_illegal()) {
458 if (!value->is_pinned() && value->as_Constant() == nullptr && value->as_Local() == nullptr) {
459 walk(value);
460 assert(value->operand()->is_valid(), "must be evaluated now");
461 }
462 } else {
463 // null out this local so that linear scan can assume that all non-null values are live.
464 s->invalidate_local(index);
465 }
466 }
467 }
468 }
469
470 return new CodeEmitInfo(state, ignore_xhandler ? nullptr : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
471 }
472
473
474 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
475 return state_for(x, x->exception_state());
476 }
477
478
479 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
480 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if tiered compilation
481 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
482 * the class. */
483 if ((!CompilerConfig::is_c1_only_no_jvmci() && need_resolve) || !obj->is_loaded() || PatchALot) {
484 assert(info != nullptr, "info must be set if class is not loaded");
485 __ klass2reg_patch(nullptr, r, info);
486 } else {
487 // no patching needed
488 __ metadata2reg(obj->constant_encoding(), r);
489 }
490 }
491
492
493 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
494 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
495 CodeStub* stub = new RangeCheckStub(range_check_info, index, array);
496 if (index->is_constant()) {
497 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
498 index->as_jint(), null_check_info);
499 __ branch(lir_cond_belowEqual, stub); // forward branch
500 } else {
501 cmp_reg_mem(lir_cond_aboveEqual, index, array,
502 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
503 __ branch(lir_cond_aboveEqual, stub); // forward branch
504 }
505 }
506
507 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp_op, CodeEmitInfo* info) {
508 LIR_Opr result_op = result;
509 LIR_Opr left_op = left;
510 LIR_Opr right_op = right;
511
512 if (two_operand_lir_form && left_op != result_op) {
513 assert(right_op != result_op, "malformed");
514 __ move(left_op, result_op);
515 left_op = result_op;
516 }
517
518 switch(code) {
519 case Bytecodes::_dadd:
520 case Bytecodes::_fadd:
521 case Bytecodes::_ladd:
522 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
523 case Bytecodes::_fmul:
524 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
525
526 case Bytecodes::_dmul: __ mul(left_op, right_op, result_op, tmp_op); break;
527
528 case Bytecodes::_imul:
529 {
530 bool did_strength_reduce = false;
531
532 if (right->is_constant()) {
533 jint c = right->as_jint();
534 if (c > 0 && is_power_of_2(c)) {
535 // do not need tmp here
536 __ shift_left(left_op, exact_log2(c), result_op);
537 did_strength_reduce = true;
538 } else {
539 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
540 }
541 }
542 // we couldn't strength reduce so just emit the multiply
543 if (!did_strength_reduce) {
544 __ mul(left_op, right_op, result_op);
545 }
546 }
547 break;
548
549 case Bytecodes::_dsub:
550 case Bytecodes::_fsub:
551 case Bytecodes::_lsub:
552 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
553
554 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
555 // ldiv and lrem are implemented with a direct runtime call
556
557 case Bytecodes::_ddiv: __ div(left_op, right_op, result_op, tmp_op); break;
558
559 case Bytecodes::_drem:
560 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
561
562 default: ShouldNotReachHere();
563 }
564 }
565
566
567 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
568 arithmetic_op(code, result, left, right, tmp);
569 }
570
571
572 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
573 arithmetic_op(code, result, left, right, LIR_OprFact::illegalOpr, info);
574 }
575
576
577 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
578 arithmetic_op(code, result, left, right, tmp);
579 }
580
581
582 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
583
584 if (two_operand_lir_form && value != result_op
585 // Only 32bit right shifts require two operand form on S390.
586 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) {
587 assert(count != result_op, "malformed");
588 __ move(value, result_op);
589 value = result_op;
590 }
591
592 assert(count->is_constant() || count->is_register(), "must be");
593 switch(code) {
594 case Bytecodes::_ishl:
595 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
596 case Bytecodes::_ishr:
597 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
598 case Bytecodes::_iushr:
599 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
600 default: ShouldNotReachHere();
601 }
602 }
603
604
605 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
606 if (two_operand_lir_form && left_op != result_op) {
607 assert(right_op != result_op, "malformed");
608 __ move(left_op, result_op);
609 left_op = result_op;
610 }
611
612 switch(code) {
613 case Bytecodes::_iand:
614 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
615
616 case Bytecodes::_ior:
617 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
618
619 case Bytecodes::_ixor:
620 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
621
622 default: ShouldNotReachHere();
623 }
624 }
625
626
627 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) {
628 if (!GenerateSynchronizationCode) return;
629 // for slow path, use debug info for state after successful locking
630 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
631 __ load_stack_address_monitor(monitor_no, lock);
632 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
633 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
634 }
635
636
637 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
638 if (!GenerateSynchronizationCode) return;
639 // setup registers
640 LIR_Opr hdr = lock;
641 lock = new_hdr;
642 CodeStub* slow_path = new MonitorExitStub(lock, LockingMode != LM_MONITOR, monitor_no);
643 __ load_stack_address_monitor(monitor_no, lock);
644 __ unlock_object(hdr, object, lock, scratch, slow_path);
645 }
646
647 #ifndef PRODUCT
648 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
649 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
650 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
651 } else if (PrintNotLoaded && (!CompilerConfig::is_c1_only_no_jvmci() && new_instance->is_unresolved())) {
652 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
653 }
654 }
655 #endif
656
657 void LIRGenerator::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) {
658 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
659 // If klass is not loaded we do not know if the klass has finalizers:
660 if (UseFastNewInstance && klass->is_loaded()
661 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
662
663 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
664
665 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
666
667 assert(klass->is_loaded(), "must be loaded");
668 // allocate space for instance
669 assert(klass->size_helper() > 0, "illegal instance size");
670 const int instance_size = align_object_size(klass->size_helper());
671 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
672 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
673 } else {
674 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
675 __ branch(lir_cond_always, slow_path);
676 __ branch_destination(slow_path->continuation());
677 }
678 }
679
680
681 static bool is_constant_zero(Instruction* inst) {
682 IntConstant* c = inst->type()->as_IntConstant();
683 if (c) {
684 return (c->value() == 0);
685 }
686 return false;
687 }
688
689
690 static bool positive_constant(Instruction* inst) {
691 IntConstant* c = inst->type()->as_IntConstant();
692 if (c) {
693 return (c->value() >= 0);
694 }
695 return false;
696 }
697
698
699 static ciArrayKlass* as_array_klass(ciType* type) {
700 if (type != nullptr && type->is_array_klass() && type->is_loaded()) {
701 return (ciArrayKlass*)type;
702 } else {
703 return nullptr;
704 }
705 }
706
707 static ciType* phi_declared_type(Phi* phi) {
708 ciType* t = phi->operand_at(0)->declared_type();
709 if (t == nullptr) {
710 return nullptr;
711 }
712 for(int i = 1; i < phi->operand_count(); i++) {
713 if (t != phi->operand_at(i)->declared_type()) {
714 return nullptr;
715 }
716 }
717 return t;
718 }
719
720 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
721 Instruction* src = x->argument_at(0);
722 Instruction* src_pos = x->argument_at(1);
723 Instruction* dst = x->argument_at(2);
724 Instruction* dst_pos = x->argument_at(3);
725 Instruction* length = x->argument_at(4);
726
727 // first try to identify the likely type of the arrays involved
728 ciArrayKlass* expected_type = nullptr;
729 bool is_exact = false, src_objarray = false, dst_objarray = false;
730 {
731 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
732 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
733 Phi* phi;
734 if (src_declared_type == nullptr && (phi = src->as_Phi()) != nullptr) {
735 src_declared_type = as_array_klass(phi_declared_type(phi));
736 }
737 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
738 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
739 if (dst_declared_type == nullptr && (phi = dst->as_Phi()) != nullptr) {
740 dst_declared_type = as_array_klass(phi_declared_type(phi));
741 }
742
743 if (src_exact_type != nullptr && src_exact_type == dst_exact_type) {
744 // the types exactly match so the type is fully known
745 is_exact = true;
746 expected_type = src_exact_type;
747 } else if (dst_exact_type != nullptr && dst_exact_type->is_obj_array_klass()) {
748 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
749 ciArrayKlass* src_type = nullptr;
750 if (src_exact_type != nullptr && src_exact_type->is_obj_array_klass()) {
751 src_type = (ciArrayKlass*) src_exact_type;
752 } else if (src_declared_type != nullptr && src_declared_type->is_obj_array_klass()) {
753 src_type = (ciArrayKlass*) src_declared_type;
754 }
755 if (src_type != nullptr) {
756 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
757 is_exact = true;
758 expected_type = dst_type;
759 }
760 }
761 }
762 // at least pass along a good guess
763 if (expected_type == nullptr) expected_type = dst_exact_type;
764 if (expected_type == nullptr) expected_type = src_declared_type;
765 if (expected_type == nullptr) expected_type = dst_declared_type;
766
767 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
768 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
769 }
770
771 // if a probable array type has been identified, figure out if any
772 // of the required checks for a fast case can be elided.
773 int flags = LIR_OpArrayCopy::all_flags;
774
775 if (!src_objarray)
776 flags &= ~LIR_OpArrayCopy::src_objarray;
777 if (!dst_objarray)
778 flags &= ~LIR_OpArrayCopy::dst_objarray;
779
780 if (!x->arg_needs_null_check(0))
781 flags &= ~LIR_OpArrayCopy::src_null_check;
782 if (!x->arg_needs_null_check(2))
783 flags &= ~LIR_OpArrayCopy::dst_null_check;
784
785
786 if (expected_type != nullptr) {
787 Value length_limit = nullptr;
788
789 IfOp* ifop = length->as_IfOp();
790 if (ifop != nullptr) {
791 // look for expressions like min(v, a.length) which ends up as
792 // x > y ? y : x or x >= y ? y : x
793 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
794 ifop->x() == ifop->fval() &&
795 ifop->y() == ifop->tval()) {
796 length_limit = ifop->y();
797 }
798 }
799
800 // try to skip null checks and range checks
801 NewArray* src_array = src->as_NewArray();
802 if (src_array != nullptr) {
803 flags &= ~LIR_OpArrayCopy::src_null_check;
804 if (length_limit != nullptr &&
805 src_array->length() == length_limit &&
806 is_constant_zero(src_pos)) {
807 flags &= ~LIR_OpArrayCopy::src_range_check;
808 }
809 }
810
811 NewArray* dst_array = dst->as_NewArray();
812 if (dst_array != nullptr) {
813 flags &= ~LIR_OpArrayCopy::dst_null_check;
814 if (length_limit != nullptr &&
815 dst_array->length() == length_limit &&
816 is_constant_zero(dst_pos)) {
817 flags &= ~LIR_OpArrayCopy::dst_range_check;
818 }
819 }
820
821 // check from incoming constant values
822 if (positive_constant(src_pos))
823 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
824 if (positive_constant(dst_pos))
825 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
826 if (positive_constant(length))
827 flags &= ~LIR_OpArrayCopy::length_positive_check;
828
829 // see if the range check can be elided, which might also imply
830 // that src or dst is non-null.
831 ArrayLength* al = length->as_ArrayLength();
832 if (al != nullptr) {
833 if (al->array() == src) {
834 // it's the length of the source array
835 flags &= ~LIR_OpArrayCopy::length_positive_check;
836 flags &= ~LIR_OpArrayCopy::src_null_check;
837 if (is_constant_zero(src_pos))
838 flags &= ~LIR_OpArrayCopy::src_range_check;
839 }
840 if (al->array() == dst) {
841 // it's the length of the destination array
842 flags &= ~LIR_OpArrayCopy::length_positive_check;
843 flags &= ~LIR_OpArrayCopy::dst_null_check;
844 if (is_constant_zero(dst_pos))
845 flags &= ~LIR_OpArrayCopy::dst_range_check;
846 }
847 }
848 if (is_exact) {
849 flags &= ~LIR_OpArrayCopy::type_check;
850 }
851 }
852
853 IntConstant* src_int = src_pos->type()->as_IntConstant();
854 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
855 if (src_int && dst_int) {
856 int s_offs = src_int->value();
857 int d_offs = dst_int->value();
858 if (src_int->value() >= dst_int->value()) {
859 flags &= ~LIR_OpArrayCopy::overlapping;
860 }
861 if (expected_type != nullptr) {
862 BasicType t = expected_type->element_type()->basic_type();
863 int element_size = type2aelembytes(t);
864 if (((arrayOopDesc::base_offset_in_bytes(t) + (uint)s_offs * element_size) % HeapWordSize == 0) &&
865 ((arrayOopDesc::base_offset_in_bytes(t) + (uint)d_offs * element_size) % HeapWordSize == 0)) {
866 flags &= ~LIR_OpArrayCopy::unaligned;
867 }
868 }
869 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
870 // src and dest positions are the same, or dst is zero so assume
871 // nonoverlapping copy.
872 flags &= ~LIR_OpArrayCopy::overlapping;
873 }
874
875 if (src == dst) {
876 // moving within a single array so no type checks are needed
877 if (flags & LIR_OpArrayCopy::type_check) {
878 flags &= ~LIR_OpArrayCopy::type_check;
879 }
880 }
881 *flagsp = flags;
882 *expected_typep = (ciArrayKlass*)expected_type;
883 }
884
885
886 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
887 assert(opr->is_register(), "why spill if item is not register?");
888
889 if (strict_fp_requires_explicit_rounding) {
890 #ifdef IA32
891 if (UseSSE < 1 && opr->is_single_fpu()) {
892 LIR_Opr result = new_register(T_FLOAT);
893 set_vreg_flag(result, must_start_in_memory);
894 assert(opr->is_register(), "only a register can be spilled");
895 assert(opr->value_type()->is_float(), "rounding only for floats available");
896 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
897 return result;
898 }
899 #else
900 Unimplemented();
901 #endif // IA32
902 }
903 return opr;
904 }
905
906
907 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
908 assert(type2size[t] == type2size[value->type()],
909 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()));
910 if (!value->is_register()) {
911 // force into a register
912 LIR_Opr r = new_register(value->type());
913 __ move(value, r);
914 value = r;
915 }
916
917 // create a spill location
918 LIR_Opr tmp = new_register(t);
919 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
920
921 // move from register to spill
922 __ move(value, tmp);
923 return tmp;
924 }
925
926 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
927 if (if_instr->should_profile()) {
928 ciMethod* method = if_instr->profiled_method();
929 assert(method != nullptr, "method should be set if branch is profiled");
930 ciMethodData* md = method->method_data_or_null();
931 assert(md != nullptr, "Sanity");
932 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
933 assert(data != nullptr, "must have profiling data");
934 assert(data->is_BranchData(), "need BranchData for two-way branches");
935 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
936 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
937 if (if_instr->is_swapped()) {
938 int t = taken_count_offset;
939 taken_count_offset = not_taken_count_offset;
940 not_taken_count_offset = t;
941 }
942
943 LIR_Opr md_reg = new_register(T_METADATA);
944 __ metadata2reg(md->constant_encoding(), md_reg);
945
946 LIR_Opr data_offset_reg = new_pointer_register();
947 __ cmove(lir_cond(cond),
948 LIR_OprFact::intptrConst(taken_count_offset),
949 LIR_OprFact::intptrConst(not_taken_count_offset),
950 data_offset_reg, as_BasicType(if_instr->x()->type()));
951
952 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
953 LIR_Opr data_reg = new_pointer_register();
954 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
955 __ move(data_addr, data_reg);
956 // Use leal instead of add to avoid destroying condition codes on x86
957 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
958 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
959 __ move(data_reg, data_addr);
960 }
961 }
962
963 // Phi technique:
964 // This is about passing live values from one basic block to the other.
965 // In code generated with Java it is rather rare that more than one
966 // value is on the stack from one basic block to the other.
967 // We optimize our technique for efficient passing of one value
968 // (of type long, int, double..) but it can be extended.
969 // When entering or leaving a basic block, all registers and all spill
970 // slots are release and empty. We use the released registers
971 // and spill slots to pass the live values from one block
972 // to the other. The topmost value, i.e., the value on TOS of expression
973 // stack is passed in registers. All other values are stored in spilling
974 // area. Every Phi has an index which designates its spill slot
975 // At exit of a basic block, we fill the register(s) and spill slots.
976 // At entry of a basic block, the block_prolog sets up the content of phi nodes
977 // and locks necessary registers and spilling slots.
978
979
980 // move current value to referenced phi function
981 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
982 Phi* phi = sux_val->as_Phi();
983 // cur_val can be null without phi being null in conjunction with inlining
984 if (phi != nullptr && cur_val != nullptr && cur_val != phi && !phi->is_illegal()) {
985 if (phi->is_local()) {
986 for (int i = 0; i < phi->operand_count(); i++) {
987 Value op = phi->operand_at(i);
988 if (op != nullptr && op->type()->is_illegal()) {
989 bailout("illegal phi operand");
990 }
991 }
992 }
993 Phi* cur_phi = cur_val->as_Phi();
994 if (cur_phi != nullptr && cur_phi->is_illegal()) {
995 // Phi and local would need to get invalidated
996 // (which is unexpected for Linear Scan).
997 // But this case is very rare so we simply bail out.
998 bailout("propagation of illegal phi");
999 return;
1000 }
1001 LIR_Opr operand = cur_val->operand();
1002 if (operand->is_illegal()) {
1003 assert(cur_val->as_Constant() != nullptr || cur_val->as_Local() != nullptr,
1004 "these can be produced lazily");
1005 operand = operand_for_instruction(cur_val);
1006 }
1007 resolver->move(operand, operand_for_instruction(phi));
1008 }
1009 }
1010
1011
1012 // Moves all stack values into their PHI position
1013 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1014 BlockBegin* bb = block();
1015 if (bb->number_of_sux() == 1) {
1016 BlockBegin* sux = bb->sux_at(0);
1017 assert(sux->number_of_preds() > 0, "invalid CFG");
1018
1019 // a block with only one predecessor never has phi functions
1020 if (sux->number_of_preds() > 1) {
1021 PhiResolver resolver(this);
1022
1023 ValueStack* sux_state = sux->state();
1024 Value sux_value;
1025 int index;
1026
1027 assert(cur_state->scope() == sux_state->scope(), "not matching");
1028 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1029 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1030
1031 for_each_stack_value(sux_state, index, sux_value) {
1032 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1033 }
1034
1035 for_each_local_value(sux_state, index, sux_value) {
1036 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1037 }
1038
1039 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1040 }
1041 }
1042 }
1043
1044
1045 LIR_Opr LIRGenerator::new_register(BasicType type) {
1046 int vreg_num = _virtual_register_number;
1047 // Add a little fudge factor for the bailout since the bailout is only checked periodically. This allows us to hand out
1048 // a few extra registers before we really run out which helps to avoid to trip over assertions.
1049 if (vreg_num + 20 >= LIR_Opr::vreg_max) {
1050 bailout("out of virtual registers in LIR generator");
1051 if (vreg_num + 2 >= LIR_Opr::vreg_max) {
1052 // Wrap it around and continue until bailout really happens to avoid hitting assertions.
1053 _virtual_register_number = LIR_Opr::vreg_base;
1054 vreg_num = LIR_Opr::vreg_base;
1055 }
1056 }
1057 _virtual_register_number += 1;
1058 LIR_Opr vreg = LIR_OprFact::virtual_register(vreg_num, type);
1059 assert(vreg != LIR_OprFact::illegal(), "ran out of virtual registers");
1060 return vreg;
1061 }
1062
1063
1064 // Try to lock using register in hint
1065 LIR_Opr LIRGenerator::rlock(Value instr) {
1066 return new_register(instr->type());
1067 }
1068
1069
1070 // does an rlock and sets result
1071 LIR_Opr LIRGenerator::rlock_result(Value x) {
1072 LIR_Opr reg = rlock(x);
1073 set_result(x, reg);
1074 return reg;
1075 }
1076
1077
1078 // does an rlock and sets result
1079 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1080 LIR_Opr reg;
1081 switch (type) {
1082 case T_BYTE:
1083 case T_BOOLEAN:
1084 reg = rlock_byte(type);
1085 break;
1086 default:
1087 reg = rlock(x);
1088 break;
1089 }
1090
1091 set_result(x, reg);
1092 return reg;
1093 }
1094
1095
1096 //---------------------------------------------------------------------
1097 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1098 ObjectType* oc = value->type()->as_ObjectType();
1099 if (oc) {
1100 return oc->constant_value();
1101 }
1102 return nullptr;
1103 }
1104
1105
1106 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1107 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1108 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1109
1110 // no moves are created for phi functions at the begin of exception
1111 // handlers, so assign operands manually here
1112 for_each_phi_fun(block(), phi,
1113 if (!phi->is_illegal()) { operand_for_instruction(phi); });
1114
1115 LIR_Opr thread_reg = getThreadPointer();
1116 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1117 exceptionOopOpr());
1118 __ move_wide(LIR_OprFact::oopConst(nullptr),
1119 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1120 __ move_wide(LIR_OprFact::oopConst(nullptr),
1121 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1122
1123 LIR_Opr result = new_register(T_OBJECT);
1124 __ move(exceptionOopOpr(), result);
1125 set_result(x, result);
1126 }
1127
1128
1129 //----------------------------------------------------------------------
1130 //----------------------------------------------------------------------
1131 //----------------------------------------------------------------------
1132 //----------------------------------------------------------------------
1133 // visitor functions
1134 //----------------------------------------------------------------------
1135 //----------------------------------------------------------------------
1136 //----------------------------------------------------------------------
1137 //----------------------------------------------------------------------
1138
1139 void LIRGenerator::do_Phi(Phi* x) {
1140 // phi functions are never visited directly
1141 ShouldNotReachHere();
1142 }
1143
1144
1145 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1146 void LIRGenerator::do_Constant(Constant* x) {
1147 if (x->state_before() != nullptr) {
1148 // Any constant with a ValueStack requires patching so emit the patch here
1149 LIR_Opr reg = rlock_result(x);
1150 CodeEmitInfo* info = state_for(x, x->state_before());
1151 __ oop2reg_patch(nullptr, reg, info);
1152 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1153 if (!x->is_pinned()) {
1154 // unpinned constants are handled specially so that they can be
1155 // put into registers when they are used multiple times within a
1156 // block. After the block completes their operand will be
1157 // cleared so that other blocks can't refer to that register.
1158 set_result(x, load_constant(x));
1159 } else {
1160 LIR_Opr res = x->operand();
1161 if (!res->is_valid()) {
1162 res = LIR_OprFact::value_type(x->type());
1163 }
1164 if (res->is_constant()) {
1165 LIR_Opr reg = rlock_result(x);
1166 __ move(res, reg);
1167 } else {
1168 set_result(x, res);
1169 }
1170 }
1171 } else {
1172 set_result(x, LIR_OprFact::value_type(x->type()));
1173 }
1174 }
1175
1176
1177 void LIRGenerator::do_Local(Local* x) {
1178 // operand_for_instruction has the side effect of setting the result
1179 // so there's no need to do it here.
1180 operand_for_instruction(x);
1181 }
1182
1183
1184 void LIRGenerator::do_Return(Return* x) {
1185 if (compilation()->env()->dtrace_method_probes()) {
1186 BasicTypeList signature;
1187 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1188 signature.append(T_METADATA); // Method*
1189 LIR_OprList* args = new LIR_OprList();
1190 args->append(getThreadPointer());
1191 LIR_Opr meth = new_register(T_METADATA);
1192 __ metadata2reg(method()->constant_encoding(), meth);
1193 args->append(meth);
1194 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, nullptr);
1195 }
1196
1197 if (x->type()->is_void()) {
1198 __ return_op(LIR_OprFact::illegalOpr);
1199 } else {
1200 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1201 LIRItem result(x->result(), this);
1202
1203 result.load_item_force(reg);
1204 __ return_op(result.result());
1205 }
1206 set_no_result(x);
1207 }
1208
1209 // Example: ref.get()
1210 // Combination of LoadField and g1 pre-write barrier
1211 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1212
1213 const int referent_offset = java_lang_ref_Reference::referent_offset();
1214
1215 assert(x->number_of_arguments() == 1, "wrong type");
1216
1217 LIRItem reference(x->argument_at(0), this);
1218 reference.load_item();
1219
1220 // need to perform the null check on the reference object
1221 CodeEmitInfo* info = nullptr;
1222 if (x->needs_null_check()) {
1223 info = state_for(x);
1224 }
1225
1226 LIR_Opr result = rlock_result(x, T_OBJECT);
1227 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT,
1228 reference, LIR_OprFact::intConst(referent_offset), result,
1229 nullptr, info);
1230 }
1231
1232 // Example: clazz.isInstance(object)
1233 void LIRGenerator::do_isInstance(Intrinsic* x) {
1234 assert(x->number_of_arguments() == 2, "wrong type");
1235
1236 // TODO could try to substitute this node with an equivalent InstanceOf
1237 // if clazz is known to be a constant Class. This will pick up newly found
1238 // constants after HIR construction. I'll leave this to a future change.
1239
1240 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1241 // could follow the aastore example in a future change.
1242
1243 LIRItem clazz(x->argument_at(0), this);
1244 LIRItem object(x->argument_at(1), this);
1245 clazz.load_item();
1246 object.load_item();
1247 LIR_Opr result = rlock_result(x);
1248
1249 // need to perform null check on clazz
1250 if (x->needs_null_check()) {
1251 CodeEmitInfo* info = state_for(x);
1252 __ null_check(clazz.result(), info);
1253 }
1254
1255 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1256 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1257 x->type(),
1258 nullptr); // null CodeEmitInfo results in a leaf call
1259 __ move(call_result, result);
1260 }
1261
1262 void LIRGenerator::load_klass(LIR_Opr obj, LIR_Opr klass, CodeEmitInfo* null_check_info) {
1263 __ load_klass(obj, klass, null_check_info);
1264 }
1265
1266 // Example: object.getClass ()
1267 void LIRGenerator::do_getClass(Intrinsic* x) {
1268 assert(x->number_of_arguments() == 1, "wrong type");
1269
1270 LIRItem rcvr(x->argument_at(0), this);
1271 rcvr.load_item();
1272 LIR_Opr temp = new_register(T_ADDRESS);
1273 LIR_Opr result = rlock_result(x);
1274
1275 // need to perform the null check on the rcvr
1276 CodeEmitInfo* info = nullptr;
1277 if (x->needs_null_check()) {
1278 info = state_for(x);
1279 }
1280
1281 LIR_Opr klass = new_register(T_METADATA);
1282 load_klass(rcvr.result(), klass, info);
1283 __ move_wide(new LIR_Address(klass, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp);
1284 // mirror = ((OopHandle)mirror)->resolve();
1285 access_load(IN_NATIVE, T_OBJECT,
1286 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result);
1287 }
1288
1289 // java.lang.Class::isPrimitive()
1290 void LIRGenerator::do_isPrimitive(Intrinsic* x) {
1291 assert(x->number_of_arguments() == 1, "wrong type");
1292
1293 LIRItem rcvr(x->argument_at(0), this);
1294 rcvr.load_item();
1295 LIR_Opr temp = new_register(T_METADATA);
1296 LIR_Opr result = rlock_result(x);
1297
1298 CodeEmitInfo* info = nullptr;
1299 if (x->needs_null_check()) {
1300 info = state_for(x);
1301 }
1302
1303 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset(), T_ADDRESS), temp, info);
1304 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::metadataConst(0));
1305 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN);
1306 }
1307
1308 // Example: Foo.class.getModifiers()
1309 void LIRGenerator::do_getModifiers(Intrinsic* x) {
1310 assert(x->number_of_arguments() == 1, "wrong type");
1311
1312 LIRItem receiver(x->argument_at(0), this);
1313 receiver.load_item();
1314 LIR_Opr result = rlock_result(x);
1315
1316 CodeEmitInfo* info = nullptr;
1317 if (x->needs_null_check()) {
1318 info = state_for(x);
1319 }
1320
1321 // While reading off the universal constant mirror is less efficient than doing
1322 // another branch and returning the constant answer, this branchless code runs into
1323 // much less risk of confusion for C1 register allocator. The choice of the universe
1324 // object here is correct as long as it returns the same modifiers we would expect
1325 // from the primitive class itself. See spec for Class.getModifiers that provides
1326 // the typed array klasses with similar modifiers as their component types.
1327
1328 Klass* univ_klass = Universe::byteArrayKlass();
1329 assert(univ_klass->modifier_flags() == (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC), "Sanity");
1330 LIR_Opr prim_klass = LIR_OprFact::metadataConst(univ_klass);
1331
1332 LIR_Opr recv_klass = new_register(T_METADATA);
1333 __ move(new LIR_Address(receiver.result(), java_lang_Class::klass_offset(), T_ADDRESS), recv_klass, info);
1334
1335 // Check if this is a Java mirror of primitive type, and select the appropriate klass.
1336 LIR_Opr klass = new_register(T_METADATA);
1337 __ cmp(lir_cond_equal, recv_klass, LIR_OprFact::metadataConst(0));
1338 __ cmove(lir_cond_equal, prim_klass, recv_klass, klass, T_ADDRESS);
1339
1340 // Get the answer.
1341 __ move(new LIR_Address(klass, in_bytes(Klass::modifier_flags_offset()), T_INT), result);
1342 }
1343
1344 void LIRGenerator::do_getObjectSize(Intrinsic* x) {
1345 assert(x->number_of_arguments() == 3, "wrong type");
1346 LIR_Opr result_reg = rlock_result(x);
1347
1348 LIRItem value(x->argument_at(2), this);
1349 value.load_item();
1350
1351 LIR_Opr klass = new_register(T_METADATA);
1352 load_klass(value.result(), klass, nullptr);
1353 LIR_Opr layout = new_register(T_INT);
1354 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
1355
1356 LabelObj* L_done = new LabelObj();
1357 LabelObj* L_array = new LabelObj();
1358
1359 __ cmp(lir_cond_lessEqual, layout, 0);
1360 __ branch(lir_cond_lessEqual, L_array->label());
1361
1362 // Instance case: the layout helper gives us instance size almost directly,
1363 // but we need to mask out the _lh_instance_slow_path_bit.
1364
1365 assert((int) Klass::_lh_instance_slow_path_bit < BytesPerLong, "clear bit");
1366
1367 LIR_Opr mask = load_immediate(~(jint) right_n_bits(LogBytesPerLong), T_INT);
1368 __ logical_and(layout, mask, layout);
1369 __ convert(Bytecodes::_i2l, layout, result_reg);
1370
1371 __ branch(lir_cond_always, L_done->label());
1372
1373 // Array case: size is round(header + element_size*arraylength).
1374 // Since arraylength is different for every array instance, we have to
1375 // compute the whole thing at runtime.
1376
1377 __ branch_destination(L_array->label());
1378
1379 int round_mask = MinObjAlignmentInBytes - 1;
1380
1381 // Figure out header sizes first.
1382 LIR_Opr hss = load_immediate(Klass::_lh_header_size_shift, T_INT);
1383 LIR_Opr hsm = load_immediate(Klass::_lh_header_size_mask, T_INT);
1384
1385 LIR_Opr header_size = new_register(T_INT);
1386 __ move(layout, header_size);
1387 LIR_Opr tmp = new_register(T_INT);
1388 __ unsigned_shift_right(header_size, hss, header_size, tmp);
1389 __ logical_and(header_size, hsm, header_size);
1390 __ add(header_size, LIR_OprFact::intConst(round_mask), header_size);
1391
1392 // Figure out the array length in bytes
1393 assert(Klass::_lh_log2_element_size_shift == 0, "use shift in place");
1394 LIR_Opr l2esm = load_immediate(Klass::_lh_log2_element_size_mask, T_INT);
1395 __ logical_and(layout, l2esm, layout);
1396
1397 LIR_Opr length_int = new_register(T_INT);
1398 __ move(new LIR_Address(value.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), length_int);
1399
1400 #ifdef _LP64
1401 LIR_Opr length = new_register(T_LONG);
1402 __ convert(Bytecodes::_i2l, length_int, length);
1403 #endif
1404
1405 // Shift-left awkwardness. Normally it is just:
1406 // __ shift_left(length, layout, length);
1407 // But C1 cannot perform shift_left with non-constant count, so we end up
1408 // doing the per-bit loop dance here. x86_32 also does not know how to shift
1409 // longs, so we have to act on ints.
1410 LabelObj* L_shift_loop = new LabelObj();
1411 LabelObj* L_shift_exit = new LabelObj();
1412
1413 __ branch_destination(L_shift_loop->label());
1414 __ cmp(lir_cond_equal, layout, 0);
1415 __ branch(lir_cond_equal, L_shift_exit->label());
1416
1417 #ifdef _LP64
1418 __ shift_left(length, 1, length);
1419 #else
1420 __ shift_left(length_int, 1, length_int);
1421 #endif
1422
1423 __ sub(layout, LIR_OprFact::intConst(1), layout);
1424
1425 __ branch(lir_cond_always, L_shift_loop->label());
1426 __ branch_destination(L_shift_exit->label());
1427
1428 // Mix all up, round, and push to the result.
1429 #ifdef _LP64
1430 LIR_Opr header_size_long = new_register(T_LONG);
1431 __ convert(Bytecodes::_i2l, header_size, header_size_long);
1432 __ add(length, header_size_long, length);
1433 if (round_mask != 0) {
1434 LIR_Opr round_mask_opr = load_immediate(~(jlong)round_mask, T_LONG);
1435 __ logical_and(length, round_mask_opr, length);
1436 }
1437 __ move(length, result_reg);
1438 #else
1439 __ add(length_int, header_size, length_int);
1440 if (round_mask != 0) {
1441 LIR_Opr round_mask_opr = load_immediate(~round_mask, T_INT);
1442 __ logical_and(length_int, round_mask_opr, length_int);
1443 }
1444 __ convert(Bytecodes::_i2l, length_int, result_reg);
1445 #endif
1446
1447 __ branch_destination(L_done->label());
1448 }
1449
1450 void LIRGenerator::do_scopedValueCache(Intrinsic* x) {
1451 do_JavaThreadField(x, JavaThread::scopedValueCache_offset());
1452 }
1453
1454 // Example: Thread.currentCarrierThread()
1455 void LIRGenerator::do_currentCarrierThread(Intrinsic* x) {
1456 do_JavaThreadField(x, JavaThread::threadObj_offset());
1457 }
1458
1459 void LIRGenerator::do_vthread(Intrinsic* x) {
1460 do_JavaThreadField(x, JavaThread::vthread_offset());
1461 }
1462
1463 void LIRGenerator::do_JavaThreadField(Intrinsic* x, ByteSize offset) {
1464 assert(x->number_of_arguments() == 0, "wrong type");
1465 LIR_Opr temp = new_register(T_ADDRESS);
1466 LIR_Opr reg = rlock_result(x);
1467 __ move(new LIR_Address(getThreadPointer(), in_bytes(offset), T_ADDRESS), temp);
1468 access_load(IN_NATIVE, T_OBJECT,
1469 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), reg);
1470 }
1471
1472 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1473 assert(x->number_of_arguments() == 1, "wrong type");
1474 LIRItem receiver(x->argument_at(0), this);
1475
1476 receiver.load_item();
1477 BasicTypeList signature;
1478 signature.append(T_OBJECT); // receiver
1479 LIR_OprList* args = new LIR_OprList();
1480 args->append(receiver.result());
1481 CodeEmitInfo* info = state_for(x, x->state());
1482 call_runtime(&signature, args,
1483 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1484 voidType, info);
1485
1486 set_no_result(x);
1487 }
1488
1489
1490 //------------------------local access--------------------------------------
1491
1492 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1493 if (x->operand()->is_illegal()) {
1494 Constant* c = x->as_Constant();
1495 if (c != nullptr) {
1496 x->set_operand(LIR_OprFact::value_type(c->type()));
1497 } else {
1498 assert(x->as_Phi() || x->as_Local() != nullptr, "only for Phi and Local");
1499 // allocate a virtual register for this local or phi
1500 x->set_operand(rlock(x));
1501 #ifdef ASSERT
1502 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, nullptr);
1503 #endif
1504 }
1505 }
1506 return x->operand();
1507 }
1508
1509 #ifdef ASSERT
1510 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1511 if (reg_num < _instruction_for_operand.length()) {
1512 return _instruction_for_operand.at(reg_num);
1513 }
1514 return nullptr;
1515 }
1516 #endif
1517
1518 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1519 if (_vreg_flags.size_in_bits() == 0) {
1520 BitMap2D temp(100, num_vreg_flags);
1521 _vreg_flags = temp;
1522 }
1523 _vreg_flags.at_put_grow(vreg_num, f, true);
1524 }
1525
1526 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1527 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1528 return false;
1529 }
1530 return _vreg_flags.at(vreg_num, f);
1531 }
1532
1533
1534 // Block local constant handling. This code is useful for keeping
1535 // unpinned constants and constants which aren't exposed in the IR in
1536 // registers. Unpinned Constant instructions have their operands
1537 // cleared when the block is finished so that other blocks can't end
1538 // up referring to their registers.
1539
1540 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1541 assert(!x->is_pinned(), "only for unpinned constants");
1542 _unpinned_constants.append(x);
1543 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1544 }
1545
1546
1547 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1548 BasicType t = c->type();
1549 for (int i = 0; i < _constants.length(); i++) {
1550 LIR_Const* other = _constants.at(i);
1551 if (t == other->type()) {
1552 switch (t) {
1553 case T_INT:
1554 case T_FLOAT:
1555 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1556 break;
1557 case T_LONG:
1558 case T_DOUBLE:
1559 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1560 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1561 break;
1562 case T_OBJECT:
1563 if (c->as_jobject() != other->as_jobject()) continue;
1564 break;
1565 default:
1566 break;
1567 }
1568 return _reg_for_constants.at(i);
1569 }
1570 }
1571
1572 LIR_Opr result = new_register(t);
1573 __ move((LIR_Opr)c, result);
1574 _constants.append(c);
1575 _reg_for_constants.append(result);
1576 return result;
1577 }
1578
1579 //------------------------field access--------------------------------------
1580
1581 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
1582 assert(x->number_of_arguments() == 4, "wrong type");
1583 LIRItem obj (x->argument_at(0), this); // object
1584 LIRItem offset(x->argument_at(1), this); // offset of field
1585 LIRItem cmp (x->argument_at(2), this); // value to compare with field
1586 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
1587 assert(obj.type()->tag() == objectTag, "invalid type");
1588 assert(cmp.type()->tag() == type->tag(), "invalid type");
1589 assert(val.type()->tag() == type->tag(), "invalid type");
1590
1591 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type),
1592 obj, offset, cmp, val);
1593 set_result(x, result);
1594 }
1595
1596 // Comment copied form templateTable_i486.cpp
1597 // ----------------------------------------------------------------------------
1598 // Volatile variables demand their effects be made known to all CPU's in
1599 // order. Store buffers on most chips allow reads & writes to reorder; the
1600 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1601 // memory barrier (i.e., it's not sufficient that the interpreter does not
1602 // reorder volatile references, the hardware also must not reorder them).
1603 //
1604 // According to the new Java Memory Model (JMM):
1605 // (1) All volatiles are serialized wrt to each other.
1606 // ALSO reads & writes act as acquire & release, so:
1607 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1608 // the read float up to before the read. It's OK for non-volatile memory refs
1609 // that happen before the volatile read to float down below it.
1610 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1611 // that happen BEFORE the write float down to after the write. It's OK for
1612 // non-volatile memory refs that happen after the volatile write to float up
1613 // before it.
1614 //
1615 // We only put in barriers around volatile refs (they are expensive), not
1616 // _between_ memory refs (that would require us to track the flavor of the
1617 // previous memory refs). Requirements (2) and (3) require some barriers
1618 // before volatile stores and after volatile loads. These nearly cover
1619 // requirement (1) but miss the volatile-store-volatile-load case. This final
1620 // case is placed after volatile-stores although it could just as well go
1621 // before volatile-loads.
1622
1623
1624 void LIRGenerator::do_StoreField(StoreField* x) {
1625 bool needs_patching = x->needs_patching();
1626 bool is_volatile = x->field()->is_volatile();
1627 BasicType field_type = x->field_type();
1628
1629 CodeEmitInfo* info = nullptr;
1630 if (needs_patching) {
1631 assert(x->explicit_null_check() == nullptr, "can't fold null check into patching field access");
1632 info = state_for(x, x->state_before());
1633 } else if (x->needs_null_check()) {
1634 NullCheck* nc = x->explicit_null_check();
1635 if (nc == nullptr) {
1636 info = state_for(x);
1637 } else {
1638 info = state_for(nc);
1639 }
1640 }
1641
1642 LIRItem object(x->obj(), this);
1643 LIRItem value(x->value(), this);
1644
1645 object.load_item();
1646
1647 if (is_volatile || needs_patching) {
1648 // load item if field is volatile (fewer special cases for volatiles)
1649 // load item if field not initialized
1650 // load item if field not constant
1651 // because of code patching we cannot inline constants
1652 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1653 value.load_byte_item();
1654 } else {
1655 value.load_item();
1656 }
1657 } else {
1658 value.load_for_store(field_type);
1659 }
1660
1661 set_no_result(x);
1662
1663 #ifndef PRODUCT
1664 if (PrintNotLoaded && needs_patching) {
1665 tty->print_cr(" ###class not loaded at store_%s bci %d",
1666 x->is_static() ? "static" : "field", x->printable_bci());
1667 }
1668 #endif
1669
1670 if (x->needs_null_check() &&
1671 (needs_patching ||
1672 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1673 // Emit an explicit null check because the offset is too large.
1674 // If the class is not loaded and the object is null, we need to deoptimize to throw a
1675 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1676 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1677 }
1678
1679 DecoratorSet decorators = IN_HEAP;
1680 if (is_volatile) {
1681 decorators |= MO_SEQ_CST;
1682 }
1683 if (needs_patching) {
1684 decorators |= C1_NEEDS_PATCHING;
1685 }
1686
1687 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()),
1688 value.result(), info != nullptr ? new CodeEmitInfo(info) : nullptr, info);
1689 }
1690
1691 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
1692 assert(x->is_pinned(),"");
1693 bool needs_range_check = x->compute_needs_range_check();
1694 bool use_length = x->length() != nullptr;
1695 bool obj_store = is_reference_type(x->elt_type());
1696 bool needs_store_check = obj_store && (x->value()->as_Constant() == nullptr ||
1697 !get_jobject_constant(x->value())->is_null_object() ||
1698 x->should_profile());
1699
1700 LIRItem array(x->array(), this);
1701 LIRItem index(x->index(), this);
1702 LIRItem value(x->value(), this);
1703 LIRItem length(this);
1704
1705 array.load_item();
1706 index.load_nonconstant();
1707
1708 if (use_length && needs_range_check) {
1709 length.set_instruction(x->length());
1710 length.load_item();
1711
1712 }
1713 if (needs_store_check || x->check_boolean()) {
1714 value.load_item();
1715 } else {
1716 value.load_for_store(x->elt_type());
1717 }
1718
1719 set_no_result(x);
1720
1721 // the CodeEmitInfo must be duplicated for each different
1722 // LIR-instruction because spilling can occur anywhere between two
1723 // instructions and so the debug information must be different
1724 CodeEmitInfo* range_check_info = state_for(x);
1725 CodeEmitInfo* null_check_info = nullptr;
1726 if (x->needs_null_check()) {
1727 null_check_info = new CodeEmitInfo(range_check_info);
1728 }
1729
1730 if (needs_range_check) {
1731 if (use_length) {
1732 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1733 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
1734 } else {
1735 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1736 // range_check also does the null check
1737 null_check_info = nullptr;
1738 }
1739 }
1740
1741 if (GenerateArrayStoreCheck && needs_store_check) {
1742 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
1743 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci());
1744 }
1745
1746 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1747 if (x->check_boolean()) {
1748 decorators |= C1_MASK_BOOLEAN;
1749 }
1750
1751 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(),
1752 nullptr, null_check_info);
1753 }
1754
1755 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type,
1756 LIRItem& base, LIR_Opr offset, LIR_Opr result,
1757 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) {
1758 decorators |= ACCESS_READ;
1759 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info);
1760 if (access.is_raw()) {
1761 _barrier_set->BarrierSetC1::load_at(access, result);
1762 } else {
1763 _barrier_set->load_at(access, result);
1764 }
1765 }
1766
1767 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type,
1768 LIR_Opr addr, LIR_Opr result) {
1769 decorators |= ACCESS_READ;
1770 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type);
1771 access.set_resolved_addr(addr);
1772 if (access.is_raw()) {
1773 _barrier_set->BarrierSetC1::load(access, result);
1774 } else {
1775 _barrier_set->load(access, result);
1776 }
1777 }
1778
1779 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type,
1780 LIRItem& base, LIR_Opr offset, LIR_Opr value,
1781 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
1782 decorators |= ACCESS_WRITE;
1783 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info);
1784 if (access.is_raw()) {
1785 _barrier_set->BarrierSetC1::store_at(access, value);
1786 } else {
1787 _barrier_set->store_at(access, value);
1788 }
1789 }
1790
1791 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type,
1792 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
1793 decorators |= ACCESS_READ;
1794 decorators |= ACCESS_WRITE;
1795 // Atomic operations are SEQ_CST by default
1796 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1797 LIRAccess access(this, decorators, base, offset, type);
1798 if (access.is_raw()) {
1799 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value);
1800 } else {
1801 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value);
1802 }
1803 }
1804
1805 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type,
1806 LIRItem& base, LIRItem& offset, LIRItem& value) {
1807 decorators |= ACCESS_READ;
1808 decorators |= ACCESS_WRITE;
1809 // Atomic operations are SEQ_CST by default
1810 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1811 LIRAccess access(this, decorators, base, offset, type);
1812 if (access.is_raw()) {
1813 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value);
1814 } else {
1815 return _barrier_set->atomic_xchg_at(access, value);
1816 }
1817 }
1818
1819 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type,
1820 LIRItem& base, LIRItem& offset, LIRItem& value) {
1821 decorators |= ACCESS_READ;
1822 decorators |= ACCESS_WRITE;
1823 // Atomic operations are SEQ_CST by default
1824 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1825 LIRAccess access(this, decorators, base, offset, type);
1826 if (access.is_raw()) {
1827 return _barrier_set->BarrierSetC1::atomic_add_at(access, value);
1828 } else {
1829 return _barrier_set->atomic_add_at(access, value);
1830 }
1831 }
1832
1833 void LIRGenerator::do_LoadField(LoadField* x) {
1834 bool needs_patching = x->needs_patching();
1835 bool is_volatile = x->field()->is_volatile();
1836 BasicType field_type = x->field_type();
1837
1838 CodeEmitInfo* info = nullptr;
1839 if (needs_patching) {
1840 assert(x->explicit_null_check() == nullptr, "can't fold null check into patching field access");
1841 info = state_for(x, x->state_before());
1842 } else if (x->needs_null_check()) {
1843 NullCheck* nc = x->explicit_null_check();
1844 if (nc == nullptr) {
1845 info = state_for(x);
1846 } else {
1847 info = state_for(nc);
1848 }
1849 }
1850
1851 LIRItem object(x->obj(), this);
1852
1853 object.load_item();
1854
1855 #ifndef PRODUCT
1856 if (PrintNotLoaded && needs_patching) {
1857 tty->print_cr(" ###class not loaded at load_%s bci %d",
1858 x->is_static() ? "static" : "field", x->printable_bci());
1859 }
1860 #endif
1861
1862 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1863 if (x->needs_null_check() &&
1864 (needs_patching ||
1865 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1866 stress_deopt)) {
1867 LIR_Opr obj = object.result();
1868 if (stress_deopt) {
1869 obj = new_register(T_OBJECT);
1870 __ move(LIR_OprFact::oopConst(nullptr), obj);
1871 }
1872 // Emit an explicit null check because the offset is too large.
1873 // If the class is not loaded and the object is null, we need to deoptimize to throw a
1874 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1875 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1876 }
1877
1878 DecoratorSet decorators = IN_HEAP;
1879 if (is_volatile) {
1880 decorators |= MO_SEQ_CST;
1881 }
1882 if (needs_patching) {
1883 decorators |= C1_NEEDS_PATCHING;
1884 }
1885
1886 LIR_Opr result = rlock_result(x, field_type);
1887 access_load_at(decorators, field_type,
1888 object, LIR_OprFact::intConst(x->offset()), result,
1889 info ? new CodeEmitInfo(info) : nullptr, info);
1890 }
1891
1892 // int/long jdk.internal.util.Preconditions.checkIndex
1893 void LIRGenerator::do_PreconditionsCheckIndex(Intrinsic* x, BasicType type) {
1894 assert(x->number_of_arguments() == 3, "wrong type");
1895 LIRItem index(x->argument_at(0), this);
1896 LIRItem length(x->argument_at(1), this);
1897 LIRItem oobef(x->argument_at(2), this);
1898
1899 index.load_item();
1900 length.load_item();
1901 oobef.load_item();
1902
1903 LIR_Opr result = rlock_result(x);
1904 // x->state() is created from copy_state_for_exception, it does not contains arguments
1905 // we should prepare them before entering into interpreter mode due to deoptimization.
1906 ValueStack* state = x->state();
1907 for (int i = 0; i < x->number_of_arguments(); i++) {
1908 Value arg = x->argument_at(i);
1909 state->push(arg->type(), arg);
1910 }
1911 CodeEmitInfo* info = state_for(x, state);
1912
1913 LIR_Opr len = length.result();
1914 LIR_Opr zero;
1915 if (type == T_INT) {
1916 zero = LIR_OprFact::intConst(0);
1917 if (length.result()->is_constant()){
1918 len = LIR_OprFact::intConst(length.result()->as_jint());
1919 }
1920 } else {
1921 assert(type == T_LONG, "sanity check");
1922 zero = LIR_OprFact::longConst(0);
1923 if (length.result()->is_constant()){
1924 len = LIR_OprFact::longConst(length.result()->as_jlong());
1925 }
1926 }
1927 // C1 can not handle the case that comparing index with constant value while condition
1928 // is neither lir_cond_equal nor lir_cond_notEqual, see LIR_Assembler::comp_op.
1929 LIR_Opr zero_reg = new_register(type);
1930 __ move(zero, zero_reg);
1931 #if defined(X86) && !defined(_LP64)
1932 // BEWARE! On 32-bit x86 cmp clobbers its left argument so we need a temp copy.
1933 LIR_Opr index_copy = new_register(index.type());
1934 // index >= 0
1935 __ move(index.result(), index_copy);
1936 __ cmp(lir_cond_less, index_copy, zero_reg);
1937 __ branch(lir_cond_less, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1938 Deoptimization::Action_make_not_entrant));
1939 // index < length
1940 __ move(index.result(), index_copy);
1941 __ cmp(lir_cond_greaterEqual, index_copy, len);
1942 __ branch(lir_cond_greaterEqual, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1943 Deoptimization::Action_make_not_entrant));
1944 #else
1945 // index >= 0
1946 __ cmp(lir_cond_less, index.result(), zero_reg);
1947 __ branch(lir_cond_less, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1948 Deoptimization::Action_make_not_entrant));
1949 // index < length
1950 __ cmp(lir_cond_greaterEqual, index.result(), len);
1951 __ branch(lir_cond_greaterEqual, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1952 Deoptimization::Action_make_not_entrant));
1953 #endif
1954 __ move(index.result(), result);
1955 }
1956
1957 //------------------------array access--------------------------------------
1958
1959
1960 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1961 LIRItem array(x->array(), this);
1962 array.load_item();
1963 LIR_Opr reg = rlock_result(x);
1964
1965 CodeEmitInfo* info = nullptr;
1966 if (x->needs_null_check()) {
1967 NullCheck* nc = x->explicit_null_check();
1968 if (nc == nullptr) {
1969 info = state_for(x);
1970 } else {
1971 info = state_for(nc);
1972 }
1973 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1974 LIR_Opr obj = new_register(T_OBJECT);
1975 __ move(LIR_OprFact::oopConst(nullptr), obj);
1976 __ null_check(obj, new CodeEmitInfo(info));
1977 }
1978 }
1979 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1980 }
1981
1982
1983 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1984 bool use_length = x->length() != nullptr;
1985 LIRItem array(x->array(), this);
1986 LIRItem index(x->index(), this);
1987 LIRItem length(this);
1988 bool needs_range_check = x->compute_needs_range_check();
1989
1990 if (use_length && needs_range_check) {
1991 length.set_instruction(x->length());
1992 length.load_item();
1993 }
1994
1995 array.load_item();
1996 if (index.is_constant() && can_inline_as_constant(x->index())) {
1997 // let it be a constant
1998 index.dont_load_item();
1999 } else {
2000 index.load_item();
2001 }
2002
2003 CodeEmitInfo* range_check_info = state_for(x);
2004 CodeEmitInfo* null_check_info = nullptr;
2005 if (x->needs_null_check()) {
2006 NullCheck* nc = x->explicit_null_check();
2007 if (nc != nullptr) {
2008 null_check_info = state_for(nc);
2009 } else {
2010 null_check_info = range_check_info;
2011 }
2012 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
2013 LIR_Opr obj = new_register(T_OBJECT);
2014 __ move(LIR_OprFact::oopConst(nullptr), obj);
2015 __ null_check(obj, new CodeEmitInfo(null_check_info));
2016 }
2017 }
2018
2019 if (needs_range_check) {
2020 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
2021 __ branch(lir_cond_always, new RangeCheckStub(range_check_info, index.result(), array.result()));
2022 } else if (use_length) {
2023 // TODO: use a (modified) version of array_range_check that does not require a
2024 // constant length to be loaded to a register
2025 __ cmp(lir_cond_belowEqual, length.result(), index.result());
2026 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
2027 } else {
2028 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
2029 // The range check performs the null check, so clear it out for the load
2030 null_check_info = nullptr;
2031 }
2032 }
2033
2034 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
2035
2036 LIR_Opr result = rlock_result(x, x->elt_type());
2037 access_load_at(decorators, x->elt_type(),
2038 array, index.result(), result,
2039 nullptr, null_check_info);
2040 }
2041
2042
2043 void LIRGenerator::do_NullCheck(NullCheck* x) {
2044 if (x->can_trap()) {
2045 LIRItem value(x->obj(), this);
2046 value.load_item();
2047 CodeEmitInfo* info = state_for(x);
2048 __ null_check(value.result(), info);
2049 }
2050 }
2051
2052
2053 void LIRGenerator::do_TypeCast(TypeCast* x) {
2054 LIRItem value(x->obj(), this);
2055 value.load_item();
2056 // the result is the same as from the node we are casting
2057 set_result(x, value.result());
2058 }
2059
2060
2061 void LIRGenerator::do_Throw(Throw* x) {
2062 LIRItem exception(x->exception(), this);
2063 exception.load_item();
2064 set_no_result(x);
2065 LIR_Opr exception_opr = exception.result();
2066 CodeEmitInfo* info = state_for(x, x->state());
2067
2068 #ifndef PRODUCT
2069 if (PrintC1Statistics) {
2070 increment_counter(Runtime1::throw_count_address(), T_INT);
2071 }
2072 #endif
2073
2074 // check if the instruction has an xhandler in any of the nested scopes
2075 bool unwind = false;
2076 if (info->exception_handlers()->length() == 0) {
2077 // this throw is not inside an xhandler
2078 unwind = true;
2079 } else {
2080 // get some idea of the throw type
2081 bool type_is_exact = true;
2082 ciType* throw_type = x->exception()->exact_type();
2083 if (throw_type == nullptr) {
2084 type_is_exact = false;
2085 throw_type = x->exception()->declared_type();
2086 }
2087 if (throw_type != nullptr && throw_type->is_instance_klass()) {
2088 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
2089 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
2090 }
2091 }
2092
2093 // do null check before moving exception oop into fixed register
2094 // to avoid a fixed interval with an oop during the null check.
2095 // Use a copy of the CodeEmitInfo because debug information is
2096 // different for null_check and throw.
2097 if (x->exception()->as_NewInstance() == nullptr && x->exception()->as_ExceptionObject() == nullptr) {
2098 // if the exception object wasn't created using new then it might be null.
2099 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
2100 }
2101
2102 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2103 // we need to go through the exception lookup path to get JVMTI
2104 // notification done
2105 unwind = false;
2106 }
2107
2108 // move exception oop into fixed register
2109 __ move(exception_opr, exceptionOopOpr());
2110
2111 if (unwind) {
2112 __ unwind_exception(exceptionOopOpr());
2113 } else {
2114 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2115 }
2116 }
2117
2118
2119 void LIRGenerator::do_RoundFP(RoundFP* x) {
2120 assert(strict_fp_requires_explicit_rounding, "not required");
2121
2122 LIRItem input(x->input(), this);
2123 input.load_item();
2124 LIR_Opr input_opr = input.result();
2125 assert(input_opr->is_register(), "why round if value is not in a register?");
2126 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2127 if (input_opr->is_single_fpu()) {
2128 set_result(x, round_item(input_opr)); // This code path not currently taken
2129 } else {
2130 LIR_Opr result = new_register(T_DOUBLE);
2131 set_vreg_flag(result, must_start_in_memory);
2132 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2133 set_result(x, result);
2134 }
2135 }
2136
2137
2138 void LIRGenerator::do_UnsafeGet(UnsafeGet* x) {
2139 BasicType type = x->basic_type();
2140 LIRItem src(x->object(), this);
2141 LIRItem off(x->offset(), this);
2142
2143 off.load_item();
2144 src.load_item();
2145
2146 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2147
2148 if (x->is_volatile()) {
2149 decorators |= MO_SEQ_CST;
2150 }
2151 if (type == T_BOOLEAN) {
2152 decorators |= C1_MASK_BOOLEAN;
2153 }
2154 if (is_reference_type(type)) {
2155 decorators |= ON_UNKNOWN_OOP_REF;
2156 }
2157
2158 LIR_Opr result = rlock_result(x, type);
2159 if (!x->is_raw()) {
2160 access_load_at(decorators, type, src, off.result(), result);
2161 } else {
2162 // Currently it is only used in GraphBuilder::setup_osr_entry_block.
2163 // It reads the value from [src + offset] directly.
2164 #ifdef _LP64
2165 LIR_Opr offset = new_register(T_LONG);
2166 __ convert(Bytecodes::_i2l, off.result(), offset);
2167 #else
2168 LIR_Opr offset = off.result();
2169 #endif
2170 LIR_Address* addr = new LIR_Address(src.result(), offset, type);
2171 if (is_reference_type(type)) {
2172 __ move_wide(addr, result);
2173 } else {
2174 __ move(addr, result);
2175 }
2176 }
2177 }
2178
2179
2180 void LIRGenerator::do_UnsafePut(UnsafePut* x) {
2181 BasicType type = x->basic_type();
2182 LIRItem src(x->object(), this);
2183 LIRItem off(x->offset(), this);
2184 LIRItem data(x->value(), this);
2185
2186 src.load_item();
2187 if (type == T_BOOLEAN || type == T_BYTE) {
2188 data.load_byte_item();
2189 } else {
2190 data.load_item();
2191 }
2192 off.load_item();
2193
2194 set_no_result(x);
2195
2196 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2197 if (is_reference_type(type)) {
2198 decorators |= ON_UNKNOWN_OOP_REF;
2199 }
2200 if (x->is_volatile()) {
2201 decorators |= MO_SEQ_CST;
2202 }
2203 access_store_at(decorators, type, src, off.result(), data.result());
2204 }
2205
2206 void LIRGenerator::do_UnsafeGetAndSet(UnsafeGetAndSet* x) {
2207 BasicType type = x->basic_type();
2208 LIRItem src(x->object(), this);
2209 LIRItem off(x->offset(), this);
2210 LIRItem value(x->value(), this);
2211
2212 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS | MO_SEQ_CST;
2213
2214 if (is_reference_type(type)) {
2215 decorators |= ON_UNKNOWN_OOP_REF;
2216 }
2217
2218 LIR_Opr result;
2219 if (x->is_add()) {
2220 result = access_atomic_add_at(decorators, type, src, off, value);
2221 } else {
2222 result = access_atomic_xchg_at(decorators, type, src, off, value);
2223 }
2224 set_result(x, result);
2225 }
2226
2227 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2228 int lng = x->length();
2229
2230 for (int i = 0; i < lng; i++) {
2231 C1SwitchRange* one_range = x->at(i);
2232 int low_key = one_range->low_key();
2233 int high_key = one_range->high_key();
2234 BlockBegin* dest = one_range->sux();
2235 if (low_key == high_key) {
2236 __ cmp(lir_cond_equal, value, low_key);
2237 __ branch(lir_cond_equal, dest);
2238 } else if (high_key - low_key == 1) {
2239 __ cmp(lir_cond_equal, value, low_key);
2240 __ branch(lir_cond_equal, dest);
2241 __ cmp(lir_cond_equal, value, high_key);
2242 __ branch(lir_cond_equal, dest);
2243 } else {
2244 LabelObj* L = new LabelObj();
2245 __ cmp(lir_cond_less, value, low_key);
2246 __ branch(lir_cond_less, L->label());
2247 __ cmp(lir_cond_lessEqual, value, high_key);
2248 __ branch(lir_cond_lessEqual, dest);
2249 __ branch_destination(L->label());
2250 }
2251 }
2252 __ jump(default_sux);
2253 }
2254
2255
2256 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2257 SwitchRangeList* res = new SwitchRangeList();
2258 int len = x->length();
2259 if (len > 0) {
2260 BlockBegin* sux = x->sux_at(0);
2261 int low = x->lo_key();
2262 BlockBegin* default_sux = x->default_sux();
2263 C1SwitchRange* range = new C1SwitchRange(low, sux);
2264 for (int i = 0; i < len; i++) {
2265 int key = low + i;
2266 BlockBegin* new_sux = x->sux_at(i);
2267 if (sux == new_sux) {
2268 // still in same range
2269 range->set_high_key(key);
2270 } else {
2271 // skip tests which explicitly dispatch to the default
2272 if (sux != default_sux) {
2273 res->append(range);
2274 }
2275 range = new C1SwitchRange(key, new_sux);
2276 }
2277 sux = new_sux;
2278 }
2279 if (res->length() == 0 || res->last() != range) res->append(range);
2280 }
2281 return res;
2282 }
2283
2284
2285 // we expect the keys to be sorted by increasing value
2286 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2287 SwitchRangeList* res = new SwitchRangeList();
2288 int len = x->length();
2289 if (len > 0) {
2290 BlockBegin* default_sux = x->default_sux();
2291 int key = x->key_at(0);
2292 BlockBegin* sux = x->sux_at(0);
2293 C1SwitchRange* range = new C1SwitchRange(key, sux);
2294 for (int i = 1; i < len; i++) {
2295 int new_key = x->key_at(i);
2296 BlockBegin* new_sux = x->sux_at(i);
2297 if (key+1 == new_key && sux == new_sux) {
2298 // still in same range
2299 range->set_high_key(new_key);
2300 } else {
2301 // skip tests which explicitly dispatch to the default
2302 if (range->sux() != default_sux) {
2303 res->append(range);
2304 }
2305 range = new C1SwitchRange(new_key, new_sux);
2306 }
2307 key = new_key;
2308 sux = new_sux;
2309 }
2310 if (res->length() == 0 || res->last() != range) res->append(range);
2311 }
2312 return res;
2313 }
2314
2315
2316 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2317 LIRItem tag(x->tag(), this);
2318 tag.load_item();
2319 set_no_result(x);
2320
2321 if (x->is_safepoint()) {
2322 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2323 }
2324
2325 // move values into phi locations
2326 move_to_phi(x->state());
2327
2328 int lo_key = x->lo_key();
2329 int len = x->length();
2330 assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
2331 LIR_Opr value = tag.result();
2332
2333 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2334 ciMethod* method = x->state()->scope()->method();
2335 ciMethodData* md = method->method_data_or_null();
2336 assert(md != nullptr, "Sanity");
2337 ciProfileData* data = md->bci_to_data(x->state()->bci());
2338 assert(data != nullptr, "must have profiling data");
2339 assert(data->is_MultiBranchData(), "bad profile data?");
2340 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2341 LIR_Opr md_reg = new_register(T_METADATA);
2342 __ metadata2reg(md->constant_encoding(), md_reg);
2343 LIR_Opr data_offset_reg = new_pointer_register();
2344 LIR_Opr tmp_reg = new_pointer_register();
2345
2346 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2347 for (int i = 0; i < len; i++) {
2348 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2349 __ cmp(lir_cond_equal, value, i + lo_key);
2350 __ move(data_offset_reg, tmp_reg);
2351 __ cmove(lir_cond_equal,
2352 LIR_OprFact::intptrConst(count_offset),
2353 tmp_reg,
2354 data_offset_reg, T_INT);
2355 }
2356
2357 LIR_Opr data_reg = new_pointer_register();
2358 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2359 __ move(data_addr, data_reg);
2360 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2361 __ move(data_reg, data_addr);
2362 }
2363
2364 if (UseTableRanges) {
2365 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2366 } else {
2367 for (int i = 0; i < len; i++) {
2368 __ cmp(lir_cond_equal, value, i + lo_key);
2369 __ branch(lir_cond_equal, x->sux_at(i));
2370 }
2371 __ jump(x->default_sux());
2372 }
2373 }
2374
2375
2376 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2377 LIRItem tag(x->tag(), this);
2378 tag.load_item();
2379 set_no_result(x);
2380
2381 if (x->is_safepoint()) {
2382 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2383 }
2384
2385 // move values into phi locations
2386 move_to_phi(x->state());
2387
2388 LIR_Opr value = tag.result();
2389 int len = x->length();
2390
2391 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2392 ciMethod* method = x->state()->scope()->method();
2393 ciMethodData* md = method->method_data_or_null();
2394 assert(md != nullptr, "Sanity");
2395 ciProfileData* data = md->bci_to_data(x->state()->bci());
2396 assert(data != nullptr, "must have profiling data");
2397 assert(data->is_MultiBranchData(), "bad profile data?");
2398 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2399 LIR_Opr md_reg = new_register(T_METADATA);
2400 __ metadata2reg(md->constant_encoding(), md_reg);
2401 LIR_Opr data_offset_reg = new_pointer_register();
2402 LIR_Opr tmp_reg = new_pointer_register();
2403
2404 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2405 for (int i = 0; i < len; i++) {
2406 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2407 __ cmp(lir_cond_equal, value, x->key_at(i));
2408 __ move(data_offset_reg, tmp_reg);
2409 __ cmove(lir_cond_equal,
2410 LIR_OprFact::intptrConst(count_offset),
2411 tmp_reg,
2412 data_offset_reg, T_INT);
2413 }
2414
2415 LIR_Opr data_reg = new_pointer_register();
2416 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2417 __ move(data_addr, data_reg);
2418 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2419 __ move(data_reg, data_addr);
2420 }
2421
2422 if (UseTableRanges) {
2423 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2424 } else {
2425 int len = x->length();
2426 for (int i = 0; i < len; i++) {
2427 __ cmp(lir_cond_equal, value, x->key_at(i));
2428 __ branch(lir_cond_equal, x->sux_at(i));
2429 }
2430 __ jump(x->default_sux());
2431 }
2432 }
2433
2434
2435 void LIRGenerator::do_Goto(Goto* x) {
2436 set_no_result(x);
2437
2438 if (block()->next()->as_OsrEntry()) {
2439 // need to free up storage used for OSR entry point
2440 LIR_Opr osrBuffer = block()->next()->operand();
2441 BasicTypeList signature;
2442 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2443 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2444 __ move(osrBuffer, cc->args()->at(0));
2445 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2446 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2447 }
2448
2449 if (x->is_safepoint()) {
2450 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2451
2452 // increment backedge counter if needed
2453 CodeEmitInfo* info = state_for(x, state);
2454 increment_backedge_counter(info, x->profiled_bci());
2455 CodeEmitInfo* safepoint_info = state_for(x, state);
2456 __ safepoint(safepoint_poll_register(), safepoint_info);
2457 }
2458
2459 // Gotos can be folded Ifs, handle this case.
2460 if (x->should_profile()) {
2461 ciMethod* method = x->profiled_method();
2462 assert(method != nullptr, "method should be set if branch is profiled");
2463 ciMethodData* md = method->method_data_or_null();
2464 assert(md != nullptr, "Sanity");
2465 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2466 assert(data != nullptr, "must have profiling data");
2467 int offset;
2468 if (x->direction() == Goto::taken) {
2469 assert(data->is_BranchData(), "need BranchData for two-way branches");
2470 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2471 } else if (x->direction() == Goto::not_taken) {
2472 assert(data->is_BranchData(), "need BranchData for two-way branches");
2473 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2474 } else {
2475 assert(data->is_JumpData(), "need JumpData for branches");
2476 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2477 }
2478 LIR_Opr md_reg = new_register(T_METADATA);
2479 __ metadata2reg(md->constant_encoding(), md_reg);
2480
2481 increment_counter(new LIR_Address(md_reg, offset,
2482 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2483 }
2484
2485 // emit phi-instruction move after safepoint since this simplifies
2486 // describing the state as the safepoint.
2487 move_to_phi(x->state());
2488
2489 __ jump(x->default_sux());
2490 }
2491
2492 /**
2493 * Emit profiling code if needed for arguments, parameters, return value types
2494 *
2495 * @param md MDO the code will update at runtime
2496 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2497 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2498 * @param profiled_k current profile
2499 * @param obj IR node for the object to be profiled
2500 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2501 * Set once we find an update to make and use for next ones.
2502 * @param not_null true if we know obj cannot be null
2503 * @param signature_at_call_k signature at call for obj
2504 * @param callee_signature_k signature of callee for obj
2505 * at call and callee signatures differ at method handle call
2506 * @return the only klass we know will ever be seen at this profile point
2507 */
2508 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2509 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2510 ciKlass* callee_signature_k) {
2511 ciKlass* result = nullptr;
2512 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2513 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2514 // known not to be null or null bit already set and already set to
2515 // unknown: nothing we can do to improve profiling
2516 if (!do_null && !do_update) {
2517 return result;
2518 }
2519
2520 ciKlass* exact_klass = nullptr;
2521 Compilation* comp = Compilation::current();
2522 if (do_update) {
2523 // try to find exact type, using CHA if possible, so that loading
2524 // the klass from the object can be avoided
2525 ciType* type = obj->exact_type();
2526 if (type == nullptr) {
2527 type = obj->declared_type();
2528 type = comp->cha_exact_type(type);
2529 }
2530 assert(type == nullptr || type->is_klass(), "type should be class");
2531 exact_klass = (type != nullptr && type->is_loaded()) ? (ciKlass*)type : nullptr;
2532
2533 do_update = exact_klass == nullptr || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2534 }
2535
2536 if (!do_null && !do_update) {
2537 return result;
2538 }
2539
2540 ciKlass* exact_signature_k = nullptr;
2541 if (do_update) {
2542 // Is the type from the signature exact (the only one possible)?
2543 exact_signature_k = signature_at_call_k->exact_klass();
2544 if (exact_signature_k == nullptr) {
2545 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2546 } else {
2547 result = exact_signature_k;
2548 // Known statically. No need to emit any code: prevent
2549 // LIR_Assembler::emit_profile_type() from emitting useless code
2550 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2551 }
2552 // exact_klass and exact_signature_k can be both non null but
2553 // different if exact_klass is loaded after the ciObject for
2554 // exact_signature_k is created.
2555 if (exact_klass == nullptr && exact_signature_k != nullptr && exact_klass != exact_signature_k) {
2556 // sometimes the type of the signature is better than the best type
2557 // the compiler has
2558 exact_klass = exact_signature_k;
2559 }
2560 if (callee_signature_k != nullptr &&
2561 callee_signature_k != signature_at_call_k) {
2562 ciKlass* improved_klass = callee_signature_k->exact_klass();
2563 if (improved_klass == nullptr) {
2564 improved_klass = comp->cha_exact_type(callee_signature_k);
2565 }
2566 if (exact_klass == nullptr && improved_klass != nullptr && exact_klass != improved_klass) {
2567 exact_klass = exact_signature_k;
2568 }
2569 }
2570 do_update = exact_klass == nullptr || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2571 }
2572
2573 if (!do_null && !do_update) {
2574 return result;
2575 }
2576
2577 if (mdp == LIR_OprFact::illegalOpr) {
2578 mdp = new_register(T_METADATA);
2579 __ metadata2reg(md->constant_encoding(), mdp);
2580 if (md_base_offset != 0) {
2581 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2582 mdp = new_pointer_register();
2583 __ leal(LIR_OprFact::address(base_type_address), mdp);
2584 }
2585 }
2586 LIRItem value(obj, this);
2587 value.load_item();
2588 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2589 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != nullptr);
2590 return result;
2591 }
2592
2593 // profile parameters on entry to the root of the compilation
2594 void LIRGenerator::profile_parameters(Base* x) {
2595 if (compilation()->profile_parameters()) {
2596 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2597 ciMethodData* md = scope()->method()->method_data_or_null();
2598 assert(md != nullptr, "Sanity");
2599
2600 if (md->parameters_type_data() != nullptr) {
2601 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2602 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2603 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2604 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2605 LIR_Opr src = args->at(i);
2606 assert(!src->is_illegal(), "check");
2607 BasicType t = src->type();
2608 if (is_reference_type(t)) {
2609 intptr_t profiled_k = parameters->type(j);
2610 Local* local = x->state()->local_at(java_index)->as_Local();
2611 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2612 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2613 profiled_k, local, mdp, false, local->declared_type()->as_klass(), nullptr);
2614 // If the profile is known statically set it once for all and do not emit any code
2615 if (exact != nullptr) {
2616 md->set_parameter_type(j, exact);
2617 }
2618 j++;
2619 }
2620 java_index += type2size[t];
2621 }
2622 }
2623 }
2624 }
2625
2626 void LIRGenerator::do_Base(Base* x) {
2627 __ std_entry(LIR_OprFact::illegalOpr);
2628 // Emit moves from physical registers / stack slots to virtual registers
2629 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2630 IRScope* irScope = compilation()->hir()->top_scope();
2631 int java_index = 0;
2632 for (int i = 0; i < args->length(); i++) {
2633 LIR_Opr src = args->at(i);
2634 assert(!src->is_illegal(), "check");
2635 BasicType t = src->type();
2636
2637 // Types which are smaller than int are passed as int, so
2638 // correct the type which passed.
2639 switch (t) {
2640 case T_BYTE:
2641 case T_BOOLEAN:
2642 case T_SHORT:
2643 case T_CHAR:
2644 t = T_INT;
2645 break;
2646 default:
2647 break;
2648 }
2649
2650 LIR_Opr dest = new_register(t);
2651 __ move(src, dest);
2652
2653 // Assign new location to Local instruction for this local
2654 Local* local = x->state()->local_at(java_index)->as_Local();
2655 assert(local != nullptr, "Locals for incoming arguments must have been created");
2656 #ifndef __SOFTFP__
2657 // The java calling convention passes double as long and float as int.
2658 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2659 #endif // __SOFTFP__
2660 local->set_operand(dest);
2661 #ifdef ASSERT
2662 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, nullptr);
2663 #endif
2664 java_index += type2size[t];
2665 }
2666
2667 if (compilation()->env()->dtrace_method_probes()) {
2668 BasicTypeList signature;
2669 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2670 signature.append(T_METADATA); // Method*
2671 LIR_OprList* args = new LIR_OprList();
2672 args->append(getThreadPointer());
2673 LIR_Opr meth = new_register(T_METADATA);
2674 __ metadata2reg(method()->constant_encoding(), meth);
2675 args->append(meth);
2676 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, nullptr);
2677 }
2678
2679 if (method()->is_synchronized()) {
2680 LIR_Opr obj;
2681 if (method()->is_static()) {
2682 obj = new_register(T_OBJECT);
2683 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2684 } else {
2685 Local* receiver = x->state()->local_at(0)->as_Local();
2686 assert(receiver != nullptr, "must already exist");
2687 obj = receiver->operand();
2688 }
2689 assert(obj->is_valid(), "must be valid");
2690
2691 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2692 LIR_Opr lock = syncLockOpr();
2693 __ load_stack_address_monitor(0, lock);
2694
2695 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), nullptr, x->check_flag(Instruction::DeoptimizeOnException));
2696 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2697
2698 // receiver is guaranteed non-null so don't need CodeEmitInfo
2699 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, nullptr);
2700 }
2701 }
2702 // increment invocation counters if needed
2703 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2704 profile_parameters(x);
2705 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), nullptr, false);
2706 increment_invocation_counter(info);
2707 }
2708
2709 // all blocks with a successor must end with an unconditional jump
2710 // to the successor even if they are consecutive
2711 __ jump(x->default_sux());
2712 }
2713
2714
2715 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2716 // construct our frame and model the production of incoming pointer
2717 // to the OSR buffer.
2718 __ osr_entry(LIR_Assembler::osrBufferPointer());
2719 LIR_Opr result = rlock_result(x);
2720 __ move(LIR_Assembler::osrBufferPointer(), result);
2721 }
2722
2723
2724 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2725 assert(args->length() == arg_list->length(),
2726 "args=%d, arg_list=%d", args->length(), arg_list->length());
2727 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2728 LIRItem* param = args->at(i);
2729 LIR_Opr loc = arg_list->at(i);
2730 if (loc->is_register()) {
2731 param->load_item_force(loc);
2732 } else {
2733 LIR_Address* addr = loc->as_address_ptr();
2734 param->load_for_store(addr->type());
2735 if (addr->type() == T_OBJECT) {
2736 __ move_wide(param->result(), addr);
2737 } else
2738 __ move(param->result(), addr);
2739 }
2740 }
2741
2742 if (x->has_receiver()) {
2743 LIRItem* receiver = args->at(0);
2744 LIR_Opr loc = arg_list->at(0);
2745 if (loc->is_register()) {
2746 receiver->load_item_force(loc);
2747 } else {
2748 assert(loc->is_address(), "just checking");
2749 receiver->load_for_store(T_OBJECT);
2750 __ move_wide(receiver->result(), loc->as_address_ptr());
2751 }
2752 }
2753 }
2754
2755
2756 // Visits all arguments, returns appropriate items without loading them
2757 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2758 LIRItemList* argument_items = new LIRItemList();
2759 if (x->has_receiver()) {
2760 LIRItem* receiver = new LIRItem(x->receiver(), this);
2761 argument_items->append(receiver);
2762 }
2763 for (int i = 0; i < x->number_of_arguments(); i++) {
2764 LIRItem* param = new LIRItem(x->argument_at(i), this);
2765 argument_items->append(param);
2766 }
2767 return argument_items;
2768 }
2769
2770
2771 // The invoke with receiver has following phases:
2772 // a) traverse and load/lock receiver;
2773 // b) traverse all arguments -> item-array (invoke_visit_argument)
2774 // c) push receiver on stack
2775 // d) load each of the items and push on stack
2776 // e) unlock receiver
2777 // f) move receiver into receiver-register %o0
2778 // g) lock result registers and emit call operation
2779 //
2780 // Before issuing a call, we must spill-save all values on stack
2781 // that are in caller-save register. "spill-save" moves those registers
2782 // either in a free callee-save register or spills them if no free
2783 // callee save register is available.
2784 //
2785 // The problem is where to invoke spill-save.
2786 // - if invoked between e) and f), we may lock callee save
2787 // register in "spill-save" that destroys the receiver register
2788 // before f) is executed
2789 // - if we rearrange f) to be earlier (by loading %o0) it
2790 // may destroy a value on the stack that is currently in %o0
2791 // and is waiting to be spilled
2792 // - if we keep the receiver locked while doing spill-save,
2793 // we cannot spill it as it is spill-locked
2794 //
2795 void LIRGenerator::do_Invoke(Invoke* x) {
2796 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2797
2798 LIR_OprList* arg_list = cc->args();
2799 LIRItemList* args = invoke_visit_arguments(x);
2800 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2801
2802 // setup result register
2803 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2804 if (x->type() != voidType) {
2805 result_register = result_register_for(x->type());
2806 }
2807
2808 CodeEmitInfo* info = state_for(x, x->state());
2809
2810 invoke_load_arguments(x, args, arg_list);
2811
2812 if (x->has_receiver()) {
2813 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2814 receiver = args->at(0)->result();
2815 }
2816
2817 // emit invoke code
2818 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2819
2820 // JSR 292
2821 // Preserve the SP over MethodHandle call sites, if needed.
2822 ciMethod* target = x->target();
2823 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
2824 target->is_method_handle_intrinsic() ||
2825 target->is_compiled_lambda_form());
2826 if (is_method_handle_invoke) {
2827 info->set_is_method_handle_invoke(true);
2828 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2829 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
2830 }
2831 }
2832
2833 switch (x->code()) {
2834 case Bytecodes::_invokestatic:
2835 __ call_static(target, result_register,
2836 SharedRuntime::get_resolve_static_call_stub(),
2837 arg_list, info);
2838 break;
2839 case Bytecodes::_invokespecial:
2840 case Bytecodes::_invokevirtual:
2841 case Bytecodes::_invokeinterface:
2842 // for loaded and final (method or class) target we still produce an inline cache,
2843 // in order to be able to call mixed mode
2844 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) {
2845 __ call_opt_virtual(target, receiver, result_register,
2846 SharedRuntime::get_resolve_opt_virtual_call_stub(),
2847 arg_list, info);
2848 } else {
2849 __ call_icvirtual(target, receiver, result_register,
2850 SharedRuntime::get_resolve_virtual_call_stub(),
2851 arg_list, info);
2852 }
2853 break;
2854 case Bytecodes::_invokedynamic: {
2855 __ call_dynamic(target, receiver, result_register,
2856 SharedRuntime::get_resolve_static_call_stub(),
2857 arg_list, info);
2858 break;
2859 }
2860 default:
2861 fatal("unexpected bytecode: %s", Bytecodes::name(x->code()));
2862 break;
2863 }
2864
2865 // JSR 292
2866 // Restore the SP after MethodHandle call sites, if needed.
2867 if (is_method_handle_invoke
2868 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2869 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
2870 }
2871
2872 if (result_register->is_valid()) {
2873 LIR_Opr result = rlock_result(x);
2874 __ move(result_register, result);
2875 }
2876 }
2877
2878
2879 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
2880 assert(x->number_of_arguments() == 1, "wrong type");
2881 LIRItem value (x->argument_at(0), this);
2882 LIR_Opr reg = rlock_result(x);
2883 value.load_item();
2884 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
2885 __ move(tmp, reg);
2886 }
2887
2888
2889
2890 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
2891 void LIRGenerator::do_IfOp(IfOp* x) {
2892 #ifdef ASSERT
2893 {
2894 ValueTag xtag = x->x()->type()->tag();
2895 ValueTag ttag = x->tval()->type()->tag();
2896 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
2897 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
2898 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
2899 }
2900 #endif
2901
2902 LIRItem left(x->x(), this);
2903 LIRItem right(x->y(), this);
2904 left.load_item();
2905 if (can_inline_as_constant(right.value())) {
2906 right.dont_load_item();
2907 } else {
2908 right.load_item();
2909 }
2910
2911 LIRItem t_val(x->tval(), this);
2912 LIRItem f_val(x->fval(), this);
2913 t_val.dont_load_item();
2914 f_val.dont_load_item();
2915 LIR_Opr reg = rlock_result(x);
2916
2917 __ cmp(lir_cond(x->cond()), left.result(), right.result());
2918 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
2919 }
2920
2921 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
2922 assert(x->number_of_arguments() == 0, "wrong type");
2923 // Enforce computation of _reserved_argument_area_size which is required on some platforms.
2924 BasicTypeList signature;
2925 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2926 LIR_Opr reg = result_register_for(x->type());
2927 __ call_runtime_leaf(routine, getThreadTemp(),
2928 reg, new LIR_OprList());
2929 LIR_Opr result = rlock_result(x);
2930 __ move(reg, result);
2931 }
2932
2933
2934
2935 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
2936 switch (x->id()) {
2937 case vmIntrinsics::_intBitsToFloat :
2938 case vmIntrinsics::_doubleToRawLongBits :
2939 case vmIntrinsics::_longBitsToDouble :
2940 case vmIntrinsics::_floatToRawIntBits : {
2941 do_FPIntrinsics(x);
2942 break;
2943 }
2944
2945 #ifdef JFR_HAVE_INTRINSICS
2946 case vmIntrinsics::_counterTime:
2947 do_RuntimeCall(CAST_FROM_FN_PTR(address, JfrTime::time_function()), x);
2948 break;
2949 #endif
2950
2951 case vmIntrinsics::_currentTimeMillis:
2952 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x);
2953 break;
2954
2955 case vmIntrinsics::_nanoTime:
2956 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x);
2957 break;
2958
2959 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
2960 case vmIntrinsics::_isInstance: do_isInstance(x); break;
2961 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break;
2962 case vmIntrinsics::_getModifiers: do_getModifiers(x); break;
2963 case vmIntrinsics::_getClass: do_getClass(x); break;
2964 case vmIntrinsics::_getObjectSize: do_getObjectSize(x); break;
2965 case vmIntrinsics::_currentCarrierThread: do_currentCarrierThread(x); break;
2966 case vmIntrinsics::_currentThread: do_vthread(x); break;
2967 case vmIntrinsics::_scopedValueCache: do_scopedValueCache(x); break;
2968
2969 case vmIntrinsics::_dlog: // fall through
2970 case vmIntrinsics::_dlog10: // fall through
2971 case vmIntrinsics::_dabs: // fall through
2972 case vmIntrinsics::_dsqrt: // fall through
2973 case vmIntrinsics::_dsqrt_strict: // fall through
2974 case vmIntrinsics::_dtan: // fall through
2975 case vmIntrinsics::_dsin : // fall through
2976 case vmIntrinsics::_dcos : // fall through
2977 case vmIntrinsics::_dexp : // fall through
2978 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
2979 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
2980
2981 case vmIntrinsics::_fmaD: do_FmaIntrinsic(x); break;
2982 case vmIntrinsics::_fmaF: do_FmaIntrinsic(x); break;
2983
2984 // Use java.lang.Math intrinsics code since it works for these intrinsics too.
2985 case vmIntrinsics::_floatToFloat16: // fall through
2986 case vmIntrinsics::_float16ToFloat: do_MathIntrinsic(x); break;
2987
2988 case vmIntrinsics::_Preconditions_checkIndex:
2989 do_PreconditionsCheckIndex(x, T_INT);
2990 break;
2991 case vmIntrinsics::_Preconditions_checkLongIndex:
2992 do_PreconditionsCheckIndex(x, T_LONG);
2993 break;
2994
2995 case vmIntrinsics::_compareAndSetReference:
2996 do_CompareAndSwap(x, objectType);
2997 break;
2998 case vmIntrinsics::_compareAndSetInt:
2999 do_CompareAndSwap(x, intType);
3000 break;
3001 case vmIntrinsics::_compareAndSetLong:
3002 do_CompareAndSwap(x, longType);
3003 break;
3004
3005 case vmIntrinsics::_loadFence :
3006 __ membar_acquire();
3007 break;
3008 case vmIntrinsics::_storeFence:
3009 __ membar_release();
3010 break;
3011 case vmIntrinsics::_storeStoreFence:
3012 __ membar_storestore();
3013 break;
3014 case vmIntrinsics::_fullFence :
3015 __ membar();
3016 break;
3017 case vmIntrinsics::_onSpinWait:
3018 __ on_spin_wait();
3019 break;
3020 case vmIntrinsics::_Reference_get:
3021 do_Reference_get(x);
3022 break;
3023
3024 case vmIntrinsics::_updateCRC32:
3025 case vmIntrinsics::_updateBytesCRC32:
3026 case vmIntrinsics::_updateByteBufferCRC32:
3027 do_update_CRC32(x);
3028 break;
3029
3030 case vmIntrinsics::_updateBytesCRC32C:
3031 case vmIntrinsics::_updateDirectByteBufferCRC32C:
3032 do_update_CRC32C(x);
3033 break;
3034
3035 case vmIntrinsics::_vectorizedMismatch:
3036 do_vectorizedMismatch(x);
3037 break;
3038
3039 case vmIntrinsics::_blackhole:
3040 do_blackhole(x);
3041 break;
3042
3043 default: ShouldNotReachHere(); break;
3044 }
3045 }
3046
3047 void LIRGenerator::profile_arguments(ProfileCall* x) {
3048 if (compilation()->profile_arguments()) {
3049 int bci = x->bci_of_invoke();
3050 ciMethodData* md = x->method()->method_data_or_null();
3051 assert(md != nullptr, "Sanity");
3052 ciProfileData* data = md->bci_to_data(bci);
3053 if (data != nullptr) {
3054 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3055 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3056 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3057 int base_offset = md->byte_offset_of_slot(data, extra);
3058 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3059 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3060
3061 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3062 int start = 0;
3063 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3064 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3065 // first argument is not profiled at call (method handle invoke)
3066 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3067 start = 1;
3068 }
3069 ciSignature* callee_signature = x->callee()->signature();
3070 // method handle call to virtual method
3071 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3072 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : nullptr);
3073
3074 bool ignored_will_link;
3075 ciSignature* signature_at_call = nullptr;
3076 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3077 ciSignatureStream signature_at_call_stream(signature_at_call);
3078
3079 // if called through method handle invoke, some arguments may have been popped
3080 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3081 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3082 ciKlass* exact = profile_type(md, base_offset, off,
3083 args->type(i), x->profiled_arg_at(i+start), mdp,
3084 !x->arg_needs_null_check(i+start),
3085 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3086 if (exact != nullptr) {
3087 md->set_argument_type(bci, i, exact);
3088 }
3089 }
3090 } else {
3091 #ifdef ASSERT
3092 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3093 int n = x->nb_profiled_args();
3094 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3095 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3096 "only at JSR292 bytecodes");
3097 #endif
3098 }
3099 }
3100 }
3101 }
3102
3103 // profile parameters on entry to an inlined method
3104 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3105 if (compilation()->profile_parameters() && x->inlined()) {
3106 ciMethodData* md = x->callee()->method_data_or_null();
3107 if (md != nullptr) {
3108 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3109 if (parameters_type_data != nullptr) {
3110 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3111 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3112 bool has_receiver = !x->callee()->is_static();
3113 ciSignature* sig = x->callee()->signature();
3114 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : nullptr);
3115 int i = 0; // to iterate on the Instructions
3116 Value arg = x->recv();
3117 bool not_null = false;
3118 int bci = x->bci_of_invoke();
3119 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3120 // The first parameter is the receiver so that's what we start
3121 // with if it exists. One exception is method handle call to
3122 // virtual method: the receiver is in the args list
3123 if (arg == nullptr || !Bytecodes::has_receiver(bc)) {
3124 i = 1;
3125 arg = x->profiled_arg_at(0);
3126 not_null = !x->arg_needs_null_check(0);
3127 }
3128 int k = 0; // to iterate on the profile data
3129 for (;;) {
3130 intptr_t profiled_k = parameters->type(k);
3131 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3132 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3133 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), nullptr);
3134 // If the profile is known statically set it once for all and do not emit any code
3135 if (exact != nullptr) {
3136 md->set_parameter_type(k, exact);
3137 }
3138 k++;
3139 if (k >= parameters_type_data->number_of_parameters()) {
3140 #ifdef ASSERT
3141 int extra = 0;
3142 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3143 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3144 x->recv() != nullptr && Bytecodes::has_receiver(bc)) {
3145 extra += 1;
3146 }
3147 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3148 #endif
3149 break;
3150 }
3151 arg = x->profiled_arg_at(i);
3152 not_null = !x->arg_needs_null_check(i);
3153 i++;
3154 }
3155 }
3156 }
3157 }
3158 }
3159
3160 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3161 // Need recv in a temporary register so it interferes with the other temporaries
3162 LIR_Opr recv = LIR_OprFact::illegalOpr;
3163 LIR_Opr mdo = new_register(T_METADATA);
3164 // tmp is used to hold the counters on SPARC
3165 LIR_Opr tmp = new_pointer_register();
3166
3167 if (x->nb_profiled_args() > 0) {
3168 profile_arguments(x);
3169 }
3170
3171 // profile parameters on inlined method entry including receiver
3172 if (x->recv() != nullptr || x->nb_profiled_args() > 0) {
3173 profile_parameters_at_call(x);
3174 }
3175
3176 if (x->recv() != nullptr) {
3177 LIRItem value(x->recv(), this);
3178 value.load_item();
3179 recv = new_register(T_OBJECT);
3180 __ move(value.result(), recv);
3181 }
3182 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3183 }
3184
3185 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
3186 int bci = x->bci_of_invoke();
3187 ciMethodData* md = x->method()->method_data_or_null();
3188 assert(md != nullptr, "Sanity");
3189 ciProfileData* data = md->bci_to_data(bci);
3190 if (data != nullptr) {
3191 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3192 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3193 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3194
3195 bool ignored_will_link;
3196 ciSignature* signature_at_call = nullptr;
3197 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3198
3199 // The offset within the MDO of the entry to update may be too large
3200 // to be used in load/store instructions on some platforms. So have
3201 // profile_type() compute the address of the profile in a register.
3202 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3203 ret->type(), x->ret(), mdp,
3204 !x->needs_null_check(),
3205 signature_at_call->return_type()->as_klass(),
3206 x->callee()->signature()->return_type()->as_klass());
3207 if (exact != nullptr) {
3208 md->set_return_type(bci, exact);
3209 }
3210 }
3211 }
3212
3213 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3214 // We can safely ignore accessors here, since c2 will inline them anyway,
3215 // accessors are also always mature.
3216 if (!x->inlinee()->is_accessor()) {
3217 CodeEmitInfo* info = state_for(x, x->state(), true);
3218 // Notify the runtime very infrequently only to take care of counter overflows
3219 int freq_log = Tier23InlineeNotifyFreqLog;
3220 double scale;
3221 if (_method->has_option_value(CompileCommandEnum::CompileThresholdScaling, scale)) {
3222 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3223 }
3224 increment_event_counter_impl(info, x->inlinee(), LIR_OprFact::intConst(InvocationCounter::count_increment), right_n_bits(freq_log), InvocationEntryBci, false, true);
3225 }
3226 }
3227
3228 void LIRGenerator::increment_backedge_counter_conditionally(LIR_Condition cond, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info, int left_bci, int right_bci, int bci) {
3229 if (compilation()->is_profiling()) {
3230 #if defined(X86) && !defined(_LP64)
3231 // BEWARE! On 32-bit x86 cmp clobbers its left argument so we need a temp copy.
3232 LIR_Opr left_copy = new_register(left->type());
3233 __ move(left, left_copy);
3234 __ cmp(cond, left_copy, right);
3235 #else
3236 __ cmp(cond, left, right);
3237 #endif
3238 LIR_Opr step = new_register(T_INT);
3239 LIR_Opr plus_one = LIR_OprFact::intConst(InvocationCounter::count_increment);
3240 LIR_Opr zero = LIR_OprFact::intConst(0);
3241 __ cmove(cond,
3242 (left_bci < bci) ? plus_one : zero,
3243 (right_bci < bci) ? plus_one : zero,
3244 step, left->type());
3245 increment_backedge_counter(info, step, bci);
3246 }
3247 }
3248
3249
3250 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge) {
3251 int freq_log = 0;
3252 int level = compilation()->env()->comp_level();
3253 if (level == CompLevel_limited_profile) {
3254 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3255 } else if (level == CompLevel_full_profile) {
3256 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3257 } else {
3258 ShouldNotReachHere();
3259 }
3260 // Increment the appropriate invocation/backedge counter and notify the runtime.
3261 double scale;
3262 if (_method->has_option_value(CompileCommandEnum::CompileThresholdScaling, scale)) {
3263 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3264 }
3265 increment_event_counter_impl(info, info->scope()->method(), step, right_n_bits(freq_log), bci, backedge, true);
3266 }
3267
3268 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3269 ciMethod *method, LIR_Opr step, int frequency,
3270 int bci, bool backedge, bool notify) {
3271 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3272 int level = _compilation->env()->comp_level();
3273 assert(level > CompLevel_simple, "Shouldn't be here");
3274
3275 int offset = -1;
3276 LIR_Opr counter_holder;
3277 if (level == CompLevel_limited_profile) {
3278 MethodCounters* counters_adr = method->ensure_method_counters();
3279 if (counters_adr == nullptr) {
3280 bailout("method counters allocation failed");
3281 return;
3282 }
3283 if (SCCache::is_on()) {
3284 counter_holder = new_register(T_METADATA);
3285 __ metadata2reg(counters_adr, counter_holder);
3286 } else {
3287 counter_holder = new_pointer_register();
3288 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3289 }
3290 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3291 MethodCounters::invocation_counter_offset());
3292 } else if (level == CompLevel_full_profile) {
3293 counter_holder = new_register(T_METADATA);
3294 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3295 MethodData::invocation_counter_offset());
3296 ciMethodData* md = method->method_data_or_null();
3297 assert(md != nullptr, "Sanity");
3298 __ metadata2reg(md->constant_encoding(), counter_holder);
3299 } else {
3300 ShouldNotReachHere();
3301 }
3302 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3303 LIR_Opr result = new_register(T_INT);
3304 __ load(counter, result);
3305 __ add(result, step, result);
3306 __ store(result, counter);
3307 if (notify && (!backedge || UseOnStackReplacement)) {
3308 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding());
3309 // The bci for info can point to cmp for if's we want the if bci
3310 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3311 int freq = frequency << InvocationCounter::count_shift;
3312 if (freq == 0) {
3313 if (!step->is_constant()) {
3314 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3315 __ branch(lir_cond_notEqual, overflow);
3316 } else {
3317 __ branch(lir_cond_always, overflow);
3318 }
3319 } else {
3320 LIR_Opr mask = load_immediate(freq, T_INT);
3321 if (!step->is_constant()) {
3322 // If step is 0, make sure the overflow check below always fails
3323 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3324 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT);
3325 }
3326 __ logical_and(result, mask, result);
3327 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3328 __ branch(lir_cond_equal, overflow);
3329 }
3330 __ branch_destination(overflow->continuation());
3331 }
3332 }
3333
3334 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3335 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3336 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3337
3338 if (x->pass_thread()) {
3339 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3340 args->append(getThreadPointer());
3341 }
3342
3343 for (int i = 0; i < x->number_of_arguments(); i++) {
3344 Value a = x->argument_at(i);
3345 LIRItem* item = new LIRItem(a, this);
3346 item->load_item();
3347 args->append(item->result());
3348 signature->append(as_BasicType(a->type()));
3349 }
3350
3351 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), nullptr);
3352 if (x->type() == voidType) {
3353 set_no_result(x);
3354 } else {
3355 __ move(result, rlock_result(x));
3356 }
3357 }
3358
3359 #ifdef ASSERT
3360 void LIRGenerator::do_Assert(Assert *x) {
3361 ValueTag tag = x->x()->type()->tag();
3362 If::Condition cond = x->cond();
3363
3364 LIRItem xitem(x->x(), this);
3365 LIRItem yitem(x->y(), this);
3366 LIRItem* xin = &xitem;
3367 LIRItem* yin = &yitem;
3368
3369 assert(tag == intTag, "Only integer assertions are valid!");
3370
3371 xin->load_item();
3372 yin->dont_load_item();
3373
3374 set_no_result(x);
3375
3376 LIR_Opr left = xin->result();
3377 LIR_Opr right = yin->result();
3378
3379 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3380 }
3381 #endif
3382
3383 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3384
3385
3386 Instruction *a = x->x();
3387 Instruction *b = x->y();
3388 if (!a || StressRangeCheckElimination) {
3389 assert(!b || StressRangeCheckElimination, "B must also be null");
3390
3391 CodeEmitInfo *info = state_for(x, x->state());
3392 CodeStub* stub = new PredicateFailedStub(info);
3393
3394 __ jump(stub);
3395 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3396 int a_int = a->type()->as_IntConstant()->value();
3397 int b_int = b->type()->as_IntConstant()->value();
3398
3399 bool ok = false;
3400
3401 switch(x->cond()) {
3402 case Instruction::eql: ok = (a_int == b_int); break;
3403 case Instruction::neq: ok = (a_int != b_int); break;
3404 case Instruction::lss: ok = (a_int < b_int); break;
3405 case Instruction::leq: ok = (a_int <= b_int); break;
3406 case Instruction::gtr: ok = (a_int > b_int); break;
3407 case Instruction::geq: ok = (a_int >= b_int); break;
3408 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3409 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3410 default: ShouldNotReachHere();
3411 }
3412
3413 if (ok) {
3414
3415 CodeEmitInfo *info = state_for(x, x->state());
3416 CodeStub* stub = new PredicateFailedStub(info);
3417
3418 __ jump(stub);
3419 }
3420 } else {
3421
3422 ValueTag tag = x->x()->type()->tag();
3423 If::Condition cond = x->cond();
3424 LIRItem xitem(x->x(), this);
3425 LIRItem yitem(x->y(), this);
3426 LIRItem* xin = &xitem;
3427 LIRItem* yin = &yitem;
3428
3429 assert(tag == intTag, "Only integer deoptimizations are valid!");
3430
3431 xin->load_item();
3432 yin->dont_load_item();
3433 set_no_result(x);
3434
3435 LIR_Opr left = xin->result();
3436 LIR_Opr right = yin->result();
3437
3438 CodeEmitInfo *info = state_for(x, x->state());
3439 CodeStub* stub = new PredicateFailedStub(info);
3440
3441 __ cmp(lir_cond(cond), left, right);
3442 __ branch(lir_cond(cond), stub);
3443 }
3444 }
3445
3446 void LIRGenerator::do_blackhole(Intrinsic *x) {
3447 assert(!x->has_receiver(), "Should have been checked before: only static methods here");
3448 for (int c = 0; c < x->number_of_arguments(); c++) {
3449 // Load the argument
3450 LIRItem vitem(x->argument_at(c), this);
3451 vitem.load_item();
3452 // ...and leave it unused.
3453 }
3454 }
3455
3456 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3457 LIRItemList args(1);
3458 LIRItem value(arg1, this);
3459 args.append(&value);
3460 BasicTypeList signature;
3461 signature.append(as_BasicType(arg1->type()));
3462
3463 return call_runtime(&signature, &args, entry, result_type, info);
3464 }
3465
3466
3467 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3468 LIRItemList args(2);
3469 LIRItem value1(arg1, this);
3470 LIRItem value2(arg2, this);
3471 args.append(&value1);
3472 args.append(&value2);
3473 BasicTypeList signature;
3474 signature.append(as_BasicType(arg1->type()));
3475 signature.append(as_BasicType(arg2->type()));
3476
3477 return call_runtime(&signature, &args, entry, result_type, info);
3478 }
3479
3480
3481 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3482 address entry, ValueType* result_type, CodeEmitInfo* info) {
3483 // get a result register
3484 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3485 LIR_Opr result = LIR_OprFact::illegalOpr;
3486 if (result_type->tag() != voidTag) {
3487 result = new_register(result_type);
3488 phys_reg = result_register_for(result_type);
3489 }
3490
3491 // move the arguments into the correct location
3492 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3493 assert(cc->length() == args->length(), "argument mismatch");
3494 for (int i = 0; i < args->length(); i++) {
3495 LIR_Opr arg = args->at(i);
3496 LIR_Opr loc = cc->at(i);
3497 if (loc->is_register()) {
3498 __ move(arg, loc);
3499 } else {
3500 LIR_Address* addr = loc->as_address_ptr();
3501 // if (!can_store_as_constant(arg)) {
3502 // LIR_Opr tmp = new_register(arg->type());
3503 // __ move(arg, tmp);
3504 // arg = tmp;
3505 // }
3506 __ move(arg, addr);
3507 }
3508 }
3509
3510 if (info) {
3511 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3512 } else {
3513 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3514 }
3515 if (result->is_valid()) {
3516 __ move(phys_reg, result);
3517 }
3518 return result;
3519 }
3520
3521
3522 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3523 address entry, ValueType* result_type, CodeEmitInfo* info) {
3524 // get a result register
3525 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3526 LIR_Opr result = LIR_OprFact::illegalOpr;
3527 if (result_type->tag() != voidTag) {
3528 result = new_register(result_type);
3529 phys_reg = result_register_for(result_type);
3530 }
3531
3532 // move the arguments into the correct location
3533 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3534
3535 assert(cc->length() == args->length(), "argument mismatch");
3536 for (int i = 0; i < args->length(); i++) {
3537 LIRItem* arg = args->at(i);
3538 LIR_Opr loc = cc->at(i);
3539 if (loc->is_register()) {
3540 arg->load_item_force(loc);
3541 } else {
3542 LIR_Address* addr = loc->as_address_ptr();
3543 arg->load_for_store(addr->type());
3544 __ move(arg->result(), addr);
3545 }
3546 }
3547
3548 if (info) {
3549 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3550 } else {
3551 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3552 }
3553 if (result->is_valid()) {
3554 __ move(phys_reg, result);
3555 }
3556 return result;
3557 }
3558
3559 void LIRGenerator::do_MemBar(MemBar* x) {
3560 LIR_Code code = x->code();
3561 switch(code) {
3562 case lir_membar_acquire : __ membar_acquire(); break;
3563 case lir_membar_release : __ membar_release(); break;
3564 case lir_membar : __ membar(); break;
3565 case lir_membar_loadload : __ membar_loadload(); break;
3566 case lir_membar_storestore: __ membar_storestore(); break;
3567 case lir_membar_loadstore : __ membar_loadstore(); break;
3568 case lir_membar_storeload : __ membar_storeload(); break;
3569 default : ShouldNotReachHere(); break;
3570 }
3571 }
3572
3573 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3574 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3575 if (two_operand_lir_form) {
3576 __ move(value, value_fixed);
3577 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3578 } else {
3579 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3580 }
3581 LIR_Opr klass = new_register(T_METADATA);
3582 load_klass(array, klass, null_check_info);
3583 null_check_info = nullptr;
3584 LIR_Opr layout = new_register(T_INT);
3585 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3586 int diffbit = Klass::layout_helper_boolean_diffbit();
3587 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3588 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3589 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3590 value = value_fixed;
3591 return value;
3592 }