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 "compiler/compilerDefinitions.inline.hpp"
38 #include "compiler/compilerOracle.hpp"
39 #include "gc/shared/barrierSet.hpp"
40 #include "gc/shared/c1/barrierSetC1.hpp"
41 #include "oops/klass.inline.hpp"
42 #include "oops/methodCounters.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "runtime/vm_version.hpp"
46 #include "utilities/bitMap.inline.hpp"
47 #include "utilities/macros.hpp"
48 #include "utilities/powerOfTwo.hpp"
49
50 #ifdef ASSERT
51 #define __ gen()->lir(__FILE__, __LINE__)->
52 #else
53 #define __ gen()->lir()->
54 #endif
55
56 #ifndef PATCHED_ADDR
57 #define PATCHED_ADDR (max_jint)
58 #endif
59
60 void PhiResolverState::reset() {
61 _virtual_operands.clear();
62 _other_operands.clear();
63 _vreg_table.clear();
64 }
65
66
67 //--------------------------------------------------------------
68 // PhiResolver
69
70 // Resolves cycles:
71 //
72 // r1 := r2 becomes temp := r1
73 // r2 := r1 r1 := r2
74 // r2 := temp
75 // and orders moves:
76 //
77 // r2 := r3 becomes r1 := r2
78 // r1 := r2 r2 := r3
79
80 PhiResolver::PhiResolver(LIRGenerator* gen)
81 : _gen(gen)
82 , _state(gen->resolver_state())
83 , _loop(nullptr)
84 , _temp(LIR_OprFact::illegalOpr)
85 {
86 // reinitialize the shared state arrays
87 _state.reset();
88 }
89
90
91 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
92 assert(src->is_valid(), "");
93 assert(dest->is_valid(), "");
94 __ move(src, dest);
95 }
96
97
98 void PhiResolver::move_temp_to(LIR_Opr dest) {
99 assert(_temp->is_valid(), "");
100 emit_move(_temp, dest);
101 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
102 }
103
104
105 void PhiResolver::move_to_temp(LIR_Opr src) {
106 assert(_temp->is_illegal(), "");
107 _temp = _gen->new_register(src->type());
108 emit_move(src, _temp);
109 }
110
111
112 // Traverse assignment graph in depth first order and generate moves in post order
113 // ie. two assignments: b := c, a := b start with node c:
114 // Call graph: move(null, c) -> move(c, b) -> move(b, a)
115 // Generates moves in this order: move b to a and move c to b
116 // ie. cycle a := b, b := a start with node a
117 // Call graph: move(null, a) -> move(a, b) -> move(b, a)
118 // Generates moves in this order: move b to temp, move a to b, move temp to a
119 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
120 if (!dest->visited()) {
121 dest->set_visited();
122 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
123 move(dest, dest->destination_at(i));
124 }
125 } else if (!dest->start_node()) {
126 // cylce in graph detected
127 assert(_loop == nullptr, "only one loop valid!");
128 _loop = dest;
129 move_to_temp(src->operand());
130 return;
131 } // else dest is a start node
132
133 if (!dest->assigned()) {
134 if (_loop == dest) {
135 move_temp_to(dest->operand());
136 dest->set_assigned();
137 } else if (src != nullptr) {
138 emit_move(src->operand(), dest->operand());
139 dest->set_assigned();
140 }
141 }
142 }
143
144
145 PhiResolver::~PhiResolver() {
146 int i;
147 // resolve any cycles in moves from and to virtual registers
148 for (i = virtual_operands().length() - 1; i >= 0; i --) {
149 ResolveNode* node = virtual_operands().at(i);
150 if (!node->visited()) {
151 _loop = nullptr;
152 move(nullptr, node);
153 node->set_start_node();
154 assert(_temp->is_illegal(), "move_temp_to() call missing");
155 }
156 }
157
158 // generate move for move from non virtual register to abitrary destination
159 for (i = other_operands().length() - 1; i >= 0; i --) {
160 ResolveNode* node = other_operands().at(i);
161 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
162 emit_move(node->operand(), node->destination_at(j)->operand());
163 }
164 }
165 }
166
167
168 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
169 ResolveNode* node;
170 if (opr->is_virtual()) {
171 int vreg_num = opr->vreg_number();
172 node = vreg_table().at_grow(vreg_num, nullptr);
173 assert(node == nullptr || node->operand() == opr, "");
174 if (node == nullptr) {
175 node = new ResolveNode(opr);
176 vreg_table().at_put(vreg_num, node);
177 }
178 // Make sure that all virtual operands show up in the list when
179 // they are used as the source of a move.
180 if (source && !virtual_operands().contains(node)) {
181 virtual_operands().append(node);
182 }
183 } else {
184 assert(source, "");
185 node = new ResolveNode(opr);
186 other_operands().append(node);
187 }
188 return node;
189 }
190
191
192 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
193 assert(dest->is_virtual(), "");
194 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
195 assert(src->is_valid(), "");
196 assert(dest->is_valid(), "");
197 ResolveNode* source = source_node(src);
198 source->append(destination_node(dest));
199 }
200
201
202 //--------------------------------------------------------------
203 // LIRItem
204
205 void LIRItem::set_result(LIR_Opr opr) {
206 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
207 value()->set_operand(opr);
208
209 #ifdef ASSERT
210 if (opr->is_virtual()) {
211 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), nullptr);
212 }
213 #endif
214
215 _result = opr;
216 }
217
218 void LIRItem::load_item() {
219 if (result()->is_illegal()) {
220 // update the items result
221 _result = value()->operand();
222 }
223 if (!result()->is_register()) {
224 LIR_Opr reg = _gen->new_register(value()->type());
225 __ move(result(), reg);
226 if (result()->is_constant()) {
227 _result = reg;
228 } else {
229 set_result(reg);
230 }
231 }
232 }
233
234
235 void LIRItem::load_for_store(BasicType type) {
236 if (_gen->can_store_as_constant(value(), type)) {
237 _result = value()->operand();
238 if (!_result->is_constant()) {
239 _result = LIR_OprFact::value_type(value()->type());
240 }
241 } else if (type == T_BYTE || type == T_BOOLEAN) {
242 load_byte_item();
243 } else {
244 load_item();
245 }
246 }
247
248 void LIRItem::load_item_force(LIR_Opr reg) {
249 LIR_Opr r = result();
250 if (r != reg) {
251 #if !defined(ARM) && !defined(E500V2)
252 if (r->type() != reg->type()) {
253 // moves between different types need an intervening spill slot
254 r = _gen->force_to_spill(r, reg->type());
255 }
256 #endif
257 __ move(r, reg);
258 _result = reg;
259 }
260 }
261
262 ciObject* LIRItem::get_jobject_constant() const {
263 ObjectType* oc = type()->as_ObjectType();
264 if (oc) {
265 return oc->constant_value();
266 }
267 return nullptr;
268 }
269
270
271 jint LIRItem::get_jint_constant() const {
272 assert(is_constant() && value() != nullptr, "");
273 assert(type()->as_IntConstant() != nullptr, "type check");
274 return type()->as_IntConstant()->value();
275 }
276
277
278 jint LIRItem::get_address_constant() const {
279 assert(is_constant() && value() != nullptr, "");
280 assert(type()->as_AddressConstant() != nullptr, "type check");
281 return type()->as_AddressConstant()->value();
282 }
283
284
285 jfloat LIRItem::get_jfloat_constant() const {
286 assert(is_constant() && value() != nullptr, "");
287 assert(type()->as_FloatConstant() != nullptr, "type check");
288 return type()->as_FloatConstant()->value();
289 }
290
291
292 jdouble LIRItem::get_jdouble_constant() const {
293 assert(is_constant() && value() != nullptr, "");
294 assert(type()->as_DoubleConstant() != nullptr, "type check");
295 return type()->as_DoubleConstant()->value();
296 }
297
298
299 jlong LIRItem::get_jlong_constant() const {
300 assert(is_constant() && value() != nullptr, "");
301 assert(type()->as_LongConstant() != nullptr, "type check");
302 return type()->as_LongConstant()->value();
303 }
304
305
306
307 //--------------------------------------------------------------
308
309
310 void LIRGenerator::block_do_prolog(BlockBegin* block) {
311 #ifndef PRODUCT
312 if (PrintIRWithLIR) {
313 block->print();
314 }
315 #endif
316
317 // set up the list of LIR instructions
318 assert(block->lir() == nullptr, "LIR list already computed for this block");
319 _lir = new LIR_List(compilation(), block);
320 block->set_lir(_lir);
321
322 __ branch_destination(block->label());
323
324 if (LIRTraceExecution &&
325 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
326 !block->is_set(BlockBegin::exception_entry_flag)) {
327 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
328 trace_block_entry(block);
329 }
330 }
331
332
333 void LIRGenerator::block_do_epilog(BlockBegin* block) {
334 #ifndef PRODUCT
335 if (PrintIRWithLIR) {
336 tty->cr();
337 }
338 #endif
339
340 // LIR_Opr for unpinned constants shouldn't be referenced by other
341 // blocks so clear them out after processing the block.
342 for (int i = 0; i < _unpinned_constants.length(); i++) {
343 _unpinned_constants.at(i)->clear_operand();
344 }
345 _unpinned_constants.trunc_to(0);
346
347 // clear our any registers for other local constants
348 _constants.trunc_to(0);
349 _reg_for_constants.trunc_to(0);
350 }
351
352
353 void LIRGenerator::block_do(BlockBegin* block) {
354 CHECK_BAILOUT();
355
356 block_do_prolog(block);
357 set_block(block);
358
359 for (Instruction* instr = block; instr != nullptr; instr = instr->next()) {
360 if (instr->is_pinned()) do_root(instr);
361 }
362
363 set_block(nullptr);
364 block_do_epilog(block);
365 }
366
367
368 //-------------------------LIRGenerator-----------------------------
369
370 // This is where the tree-walk starts; instr must be root;
371 void LIRGenerator::do_root(Value instr) {
372 CHECK_BAILOUT();
373
374 InstructionMark im(compilation(), instr);
375
376 assert(instr->is_pinned(), "use only with roots");
377 assert(instr->subst() == instr, "shouldn't have missed substitution");
378
379 instr->visit(this);
380
381 assert(!instr->has_uses() || instr->operand()->is_valid() ||
382 instr->as_Constant() != nullptr || bailed_out(), "invalid item set");
383 }
384
385
386 // This is called for each node in tree; the walk stops if a root is reached
387 void LIRGenerator::walk(Value instr) {
388 InstructionMark im(compilation(), instr);
389 //stop walk when encounter a root
390 if ((instr->is_pinned() && instr->as_Phi() == nullptr) || instr->operand()->is_valid()) {
391 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != nullptr, "this root has not yet been visited");
392 } else {
393 assert(instr->subst() == instr, "shouldn't have missed substitution");
394 instr->visit(this);
395 // assert(instr->use_count() > 0 || instr->as_Phi() != nullptr, "leaf instruction must have a use");
396 }
397 }
398
399
400 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
401 assert(state != nullptr, "state must be defined");
402
403 #ifndef PRODUCT
404 state->verify();
405 #endif
406
407 ValueStack* s = state;
408 for_each_state(s) {
409 if (s->kind() == ValueStack::EmptyExceptionState ||
410 s->kind() == ValueStack::CallerEmptyExceptionState)
411 {
412 #ifdef ASSERT
413 int index;
414 Value value;
415 for_each_stack_value(s, index, value) {
416 fatal("state must be empty");
417 }
418 for_each_local_value(s, index, value) {
419 fatal("state must be empty");
420 }
421 #endif
422 assert(s->locks_size() == 0 || s->locks_size() == 1, "state must be empty");
423 continue;
424 }
425
426 int index;
427 Value value;
428 for_each_stack_value(s, index, value) {
429 assert(value->subst() == value, "missed substitution");
430 if (!value->is_pinned() && value->as_Constant() == nullptr && value->as_Local() == nullptr) {
431 walk(value);
432 assert(value->operand()->is_valid(), "must be evaluated now");
433 }
434 }
435
436 int bci = s->bci();
437 IRScope* scope = s->scope();
438 ciMethod* method = scope->method();
439
440 MethodLivenessResult liveness = method->liveness_at_bci(bci);
441 if (bci == SynchronizationEntryBCI) {
442 if (x->as_ExceptionObject() || x->as_Throw()) {
443 // all locals are dead on exit from the synthetic unlocker
444 liveness.clear();
445 } else {
446 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
447 }
448 }
449 if (!liveness.is_valid()) {
450 // Degenerate or breakpointed method.
451 bailout("Degenerate or breakpointed method");
452 } else {
453 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
454 for_each_local_value(s, index, value) {
455 assert(value->subst() == value, "missed substitution");
456 if (liveness.at(index) && !value->type()->is_illegal()) {
457 if (!value->is_pinned() && value->as_Constant() == nullptr && value->as_Local() == nullptr) {
458 walk(value);
459 assert(value->operand()->is_valid(), "must be evaluated now");
460 }
461 } else {
462 // null out this local so that linear scan can assume that all non-null values are live.
463 s->invalidate_local(index);
464 }
465 }
466 }
467 }
468
469 return new CodeEmitInfo(state, ignore_xhandler ? nullptr : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
470 }
471
472
473 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
474 return state_for(x, x->exception_state());
475 }
476
477
478 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
479 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if tiered compilation
480 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
481 * the class. */
482 if ((!CompilerConfig::is_c1_only_no_jvmci() && need_resolve) || !obj->is_loaded() || PatchALot) {
483 assert(info != nullptr, "info must be set if class is not loaded");
484 __ klass2reg_patch(nullptr, r, info);
485 } else {
486 // no patching needed
487 __ metadata2reg(obj->constant_encoding(), r);
488 }
489 }
490
491
492 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
493 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
494 CodeStub* stub = new RangeCheckStub(range_check_info, index, array);
495 if (index->is_constant()) {
496 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
497 index->as_jint(), null_check_info);
498 __ branch(lir_cond_belowEqual, stub); // forward branch
499 } else {
500 cmp_reg_mem(lir_cond_aboveEqual, index, array,
501 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
502 __ branch(lir_cond_aboveEqual, stub); // forward branch
503 }
504 }
505
506 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp_op, CodeEmitInfo* info) {
507 LIR_Opr result_op = result;
508 LIR_Opr left_op = left;
509 LIR_Opr right_op = right;
510
511 if (two_operand_lir_form && left_op != result_op) {
512 assert(right_op != result_op, "malformed");
513 __ move(left_op, result_op);
514 left_op = result_op;
515 }
516
517 switch(code) {
518 case Bytecodes::_dadd:
519 case Bytecodes::_fadd:
520 case Bytecodes::_ladd:
521 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
522 case Bytecodes::_fmul:
523 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
524
525 case Bytecodes::_dmul: __ mul(left_op, right_op, result_op, tmp_op); break;
526
527 case Bytecodes::_imul:
528 {
529 bool did_strength_reduce = false;
530
531 if (right->is_constant()) {
532 jint c = right->as_jint();
533 if (c > 0 && is_power_of_2(c)) {
534 // do not need tmp here
535 __ shift_left(left_op, exact_log2(c), result_op);
536 did_strength_reduce = true;
537 } else {
538 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
539 }
540 }
541 // we couldn't strength reduce so just emit the multiply
542 if (!did_strength_reduce) {
543 __ mul(left_op, right_op, result_op);
544 }
545 }
546 break;
547
548 case Bytecodes::_dsub:
549 case Bytecodes::_fsub:
550 case Bytecodes::_lsub:
551 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
552
553 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
554 // ldiv and lrem are implemented with a direct runtime call
555
556 case Bytecodes::_ddiv: __ div(left_op, right_op, result_op, tmp_op); break;
557
558 case Bytecodes::_drem:
559 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
560
561 default: ShouldNotReachHere();
562 }
563 }
564
565
566 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
567 arithmetic_op(code, result, left, right, tmp);
568 }
569
570
571 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
572 arithmetic_op(code, result, left, right, LIR_OprFact::illegalOpr, info);
573 }
574
575
576 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
577 arithmetic_op(code, result, left, right, tmp);
578 }
579
580
581 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
582
583 if (two_operand_lir_form && value != result_op
584 // Only 32bit right shifts require two operand form on S390.
585 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) {
586 assert(count != result_op, "malformed");
587 __ move(value, result_op);
588 value = result_op;
589 }
590
591 assert(count->is_constant() || count->is_register(), "must be");
592 switch(code) {
593 case Bytecodes::_ishl:
594 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
595 case Bytecodes::_ishr:
596 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
597 case Bytecodes::_iushr:
598 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
599 default: ShouldNotReachHere();
600 }
601 }
602
603
604 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
605 if (two_operand_lir_form && left_op != result_op) {
606 assert(right_op != result_op, "malformed");
607 __ move(left_op, result_op);
608 left_op = result_op;
609 }
610
611 switch(code) {
612 case Bytecodes::_iand:
613 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
614
615 case Bytecodes::_ior:
616 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
617
618 case Bytecodes::_ixor:
619 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
620
621 default: ShouldNotReachHere();
622 }
623 }
624
625
626 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) {
627 if (!GenerateSynchronizationCode) return;
628 // for slow path, use debug info for state after successful locking
629 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
630 __ load_stack_address_monitor(monitor_no, lock);
631 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
632 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
633 }
634
635
636 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
637 if (!GenerateSynchronizationCode) return;
638 // setup registers
639 LIR_Opr hdr = lock;
640 lock = new_hdr;
641 CodeStub* slow_path = new MonitorExitStub(lock, LockingMode != LM_MONITOR, monitor_no);
642 __ load_stack_address_monitor(monitor_no, lock);
643 __ unlock_object(hdr, object, lock, scratch, slow_path);
644 }
645
646 #ifndef PRODUCT
647 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
648 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
649 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
650 } else if (PrintNotLoaded && (!CompilerConfig::is_c1_only_no_jvmci() && new_instance->is_unresolved())) {
651 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
652 }
653 }
654 #endif
655
656 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) {
657 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
658 // If klass is not loaded we do not know if the klass has finalizers:
659 if (UseFastNewInstance && klass->is_loaded()
660 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
661
662 C1StubId stub_id = klass->is_initialized() ? C1StubId::fast_new_instance_id : C1StubId::fast_new_instance_init_check_id;
663
664 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
665
666 assert(klass->is_loaded(), "must be loaded");
667 // allocate space for instance
668 assert(klass->size_helper() > 0, "illegal instance size");
669 const int instance_size = align_object_size(klass->size_helper());
670 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
671 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
672 } else {
673 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, C1StubId::new_instance_id);
674 __ branch(lir_cond_always, slow_path);
675 __ branch_destination(slow_path->continuation());
676 }
677 }
678
679
680 static bool is_constant_zero(Instruction* inst) {
681 IntConstant* c = inst->type()->as_IntConstant();
682 if (c) {
683 return (c->value() == 0);
684 }
685 return false;
686 }
687
688
689 static bool positive_constant(Instruction* inst) {
690 IntConstant* c = inst->type()->as_IntConstant();
691 if (c) {
692 return (c->value() >= 0);
693 }
694 return false;
695 }
696
697
698 static ciArrayKlass* as_array_klass(ciType* type) {
699 if (type != nullptr && type->is_array_klass() && type->is_loaded()) {
700 return (ciArrayKlass*)type;
701 } else {
702 return nullptr;
703 }
704 }
705
706 static ciType* phi_declared_type(Phi* phi) {
707 ciType* t = phi->operand_at(0)->declared_type();
708 if (t == nullptr) {
709 return nullptr;
710 }
711 for(int i = 1; i < phi->operand_count(); i++) {
712 if (t != phi->operand_at(i)->declared_type()) {
713 return nullptr;
714 }
715 }
716 return t;
717 }
718
719 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
720 Instruction* src = x->argument_at(0);
721 Instruction* src_pos = x->argument_at(1);
722 Instruction* dst = x->argument_at(2);
723 Instruction* dst_pos = x->argument_at(3);
724 Instruction* length = x->argument_at(4);
725
726 // first try to identify the likely type of the arrays involved
727 ciArrayKlass* expected_type = nullptr;
728 bool is_exact = false, src_objarray = false, dst_objarray = false;
729 {
730 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
731 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
732 Phi* phi;
733 if (src_declared_type == nullptr && (phi = src->as_Phi()) != nullptr) {
734 src_declared_type = as_array_klass(phi_declared_type(phi));
735 }
736 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
737 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
738 if (dst_declared_type == nullptr && (phi = dst->as_Phi()) != nullptr) {
739 dst_declared_type = as_array_klass(phi_declared_type(phi));
740 }
741
742 if (src_exact_type != nullptr && src_exact_type == dst_exact_type) {
743 // the types exactly match so the type is fully known
744 is_exact = true;
745 expected_type = src_exact_type;
746 } else if (dst_exact_type != nullptr && dst_exact_type->is_obj_array_klass()) {
747 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
748 ciArrayKlass* src_type = nullptr;
749 if (src_exact_type != nullptr && src_exact_type->is_obj_array_klass()) {
750 src_type = (ciArrayKlass*) src_exact_type;
751 } else if (src_declared_type != nullptr && src_declared_type->is_obj_array_klass()) {
752 src_type = (ciArrayKlass*) src_declared_type;
753 }
754 if (src_type != nullptr) {
755 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
756 is_exact = true;
757 expected_type = dst_type;
758 }
759 }
760 }
761 // at least pass along a good guess
762 if (expected_type == nullptr) expected_type = dst_exact_type;
763 if (expected_type == nullptr) expected_type = src_declared_type;
764 if (expected_type == nullptr) expected_type = dst_declared_type;
765
766 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
767 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
768 }
769
770 // if a probable array type has been identified, figure out if any
771 // of the required checks for a fast case can be elided.
772 int flags = LIR_OpArrayCopy::all_flags;
773
774 if (!src_objarray)
775 flags &= ~LIR_OpArrayCopy::src_objarray;
776 if (!dst_objarray)
777 flags &= ~LIR_OpArrayCopy::dst_objarray;
778
779 if (!x->arg_needs_null_check(0))
780 flags &= ~LIR_OpArrayCopy::src_null_check;
781 if (!x->arg_needs_null_check(2))
782 flags &= ~LIR_OpArrayCopy::dst_null_check;
783
784
785 if (expected_type != nullptr) {
786 Value length_limit = nullptr;
787
788 IfOp* ifop = length->as_IfOp();
789 if (ifop != nullptr) {
790 // look for expressions like min(v, a.length) which ends up as
791 // x > y ? y : x or x >= y ? y : x
792 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
793 ifop->x() == ifop->fval() &&
794 ifop->y() == ifop->tval()) {
795 length_limit = ifop->y();
796 }
797 }
798
799 // try to skip null checks and range checks
800 NewArray* src_array = src->as_NewArray();
801 if (src_array != nullptr) {
802 flags &= ~LIR_OpArrayCopy::src_null_check;
803 if (length_limit != nullptr &&
804 src_array->length() == length_limit &&
805 is_constant_zero(src_pos)) {
806 flags &= ~LIR_OpArrayCopy::src_range_check;
807 }
808 }
809
810 NewArray* dst_array = dst->as_NewArray();
811 if (dst_array != nullptr) {
812 flags &= ~LIR_OpArrayCopy::dst_null_check;
813 if (length_limit != nullptr &&
814 dst_array->length() == length_limit &&
815 is_constant_zero(dst_pos)) {
816 flags &= ~LIR_OpArrayCopy::dst_range_check;
817 }
818 }
819
820 // check from incoming constant values
821 if (positive_constant(src_pos))
822 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
823 if (positive_constant(dst_pos))
824 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
825 if (positive_constant(length))
826 flags &= ~LIR_OpArrayCopy::length_positive_check;
827
828 // see if the range check can be elided, which might also imply
829 // that src or dst is non-null.
830 ArrayLength* al = length->as_ArrayLength();
831 if (al != nullptr) {
832 if (al->array() == src) {
833 // it's the length of the source array
834 flags &= ~LIR_OpArrayCopy::length_positive_check;
835 flags &= ~LIR_OpArrayCopy::src_null_check;
836 if (is_constant_zero(src_pos))
837 flags &= ~LIR_OpArrayCopy::src_range_check;
838 }
839 if (al->array() == dst) {
840 // it's the length of the destination array
841 flags &= ~LIR_OpArrayCopy::length_positive_check;
842 flags &= ~LIR_OpArrayCopy::dst_null_check;
843 if (is_constant_zero(dst_pos))
844 flags &= ~LIR_OpArrayCopy::dst_range_check;
845 }
846 }
847 if (is_exact) {
848 flags &= ~LIR_OpArrayCopy::type_check;
849 }
850 }
851
852 IntConstant* src_int = src_pos->type()->as_IntConstant();
853 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
854 if (src_int && dst_int) {
855 int s_offs = src_int->value();
856 int d_offs = dst_int->value();
857 if (src_int->value() >= dst_int->value()) {
858 flags &= ~LIR_OpArrayCopy::overlapping;
859 }
860 if (expected_type != nullptr) {
861 BasicType t = expected_type->element_type()->basic_type();
862 int element_size = type2aelembytes(t);
863 if (((arrayOopDesc::base_offset_in_bytes(t) + (uint)s_offs * element_size) % HeapWordSize == 0) &&
864 ((arrayOopDesc::base_offset_in_bytes(t) + (uint)d_offs * element_size) % HeapWordSize == 0)) {
865 flags &= ~LIR_OpArrayCopy::unaligned;
866 }
867 }
868 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
869 // src and dest positions are the same, or dst is zero so assume
870 // nonoverlapping copy.
871 flags &= ~LIR_OpArrayCopy::overlapping;
872 }
873
874 if (src == dst) {
875 // moving within a single array so no type checks are needed
876 if (flags & LIR_OpArrayCopy::type_check) {
877 flags &= ~LIR_OpArrayCopy::type_check;
878 }
879 }
880 *flagsp = flags;
881 *expected_typep = (ciArrayKlass*)expected_type;
882 }
883
884
885 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
886 assert(opr->is_register(), "why spill if item is not register?");
887
888 if (strict_fp_requires_explicit_rounding) {
889 #ifdef IA32
890 if (UseSSE < 1 && opr->is_single_fpu()) {
891 LIR_Opr result = new_register(T_FLOAT);
892 set_vreg_flag(result, must_start_in_memory);
893 assert(opr->is_register(), "only a register can be spilled");
894 assert(opr->value_type()->is_float(), "rounding only for floats available");
895 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
896 return result;
897 }
898 #else
899 Unimplemented();
900 #endif // IA32
901 }
902 return opr;
903 }
904
905
906 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
907 assert(type2size[t] == type2size[value->type()],
908 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()));
909 if (!value->is_register()) {
910 // force into a register
911 LIR_Opr r = new_register(value->type());
912 __ move(value, r);
913 value = r;
914 }
915
916 // create a spill location
917 LIR_Opr tmp = new_register(t);
918 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
919
920 // move from register to spill
921 __ move(value, tmp);
922 return tmp;
923 }
924
925 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
926 if (if_instr->should_profile()) {
927 ciMethod* method = if_instr->profiled_method();
928 assert(method != nullptr, "method should be set if branch is profiled");
929 ciMethodData* md = method->method_data_or_null();
930 assert(md != nullptr, "Sanity");
931 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
932 assert(data != nullptr, "must have profiling data");
933 assert(data->is_BranchData(), "need BranchData for two-way branches");
934 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
935 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
936 if (if_instr->is_swapped()) {
937 int t = taken_count_offset;
938 taken_count_offset = not_taken_count_offset;
939 not_taken_count_offset = t;
940 }
941
942 LIR_Opr md_reg = new_register(T_METADATA);
943 __ metadata2reg(md->constant_encoding(), md_reg);
944
945 LIR_Opr data_offset_reg = new_pointer_register();
946 __ cmove(lir_cond(cond),
947 LIR_OprFact::intptrConst(taken_count_offset),
948 LIR_OprFact::intptrConst(not_taken_count_offset),
949 data_offset_reg, as_BasicType(if_instr->x()->type()));
950
951 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
952 LIR_Opr data_reg = new_pointer_register();
953 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
954 __ move(data_addr, data_reg);
955 // Use leal instead of add to avoid destroying condition codes on x86
956 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
957 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
958 __ move(data_reg, data_addr);
959 }
960 }
961
962 // Phi technique:
963 // This is about passing live values from one basic block to the other.
964 // In code generated with Java it is rather rare that more than one
965 // value is on the stack from one basic block to the other.
966 // We optimize our technique for efficient passing of one value
967 // (of type long, int, double..) but it can be extended.
968 // When entering or leaving a basic block, all registers and all spill
969 // slots are release and empty. We use the released registers
970 // and spill slots to pass the live values from one block
971 // to the other. The topmost value, i.e., the value on TOS of expression
972 // stack is passed in registers. All other values are stored in spilling
973 // area. Every Phi has an index which designates its spill slot
974 // At exit of a basic block, we fill the register(s) and spill slots.
975 // At entry of a basic block, the block_prolog sets up the content of phi nodes
976 // and locks necessary registers and spilling slots.
977
978
979 // move current value to referenced phi function
980 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
981 Phi* phi = sux_val->as_Phi();
982 // cur_val can be null without phi being null in conjunction with inlining
983 if (phi != nullptr && cur_val != nullptr && cur_val != phi && !phi->is_illegal()) {
984 if (phi->is_local()) {
985 for (int i = 0; i < phi->operand_count(); i++) {
986 Value op = phi->operand_at(i);
987 if (op != nullptr && op->type()->is_illegal()) {
988 bailout("illegal phi operand");
989 }
990 }
991 }
992 Phi* cur_phi = cur_val->as_Phi();
993 if (cur_phi != nullptr && cur_phi->is_illegal()) {
994 // Phi and local would need to get invalidated
995 // (which is unexpected for Linear Scan).
996 // But this case is very rare so we simply bail out.
997 bailout("propagation of illegal phi");
998 return;
999 }
1000 LIR_Opr operand = cur_val->operand();
1001 if (operand->is_illegal()) {
1002 assert(cur_val->as_Constant() != nullptr || cur_val->as_Local() != nullptr,
1003 "these can be produced lazily");
1004 operand = operand_for_instruction(cur_val);
1005 }
1006 resolver->move(operand, operand_for_instruction(phi));
1007 }
1008 }
1009
1010
1011 // Moves all stack values into their PHI position
1012 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1013 BlockBegin* bb = block();
1014 if (bb->number_of_sux() == 1) {
1015 BlockBegin* sux = bb->sux_at(0);
1016 assert(sux->number_of_preds() > 0, "invalid CFG");
1017
1018 // a block with only one predecessor never has phi functions
1019 if (sux->number_of_preds() > 1) {
1020 PhiResolver resolver(this);
1021
1022 ValueStack* sux_state = sux->state();
1023 Value sux_value;
1024 int index;
1025
1026 assert(cur_state->scope() == sux_state->scope(), "not matching");
1027 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1028 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1029
1030 for_each_stack_value(sux_state, index, sux_value) {
1031 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1032 }
1033
1034 for_each_local_value(sux_state, index, sux_value) {
1035 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1036 }
1037
1038 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1039 }
1040 }
1041 }
1042
1043
1044 LIR_Opr LIRGenerator::new_register(BasicType type) {
1045 int vreg_num = _virtual_register_number;
1046 // Add a little fudge factor for the bailout since the bailout is only checked periodically. This allows us to hand out
1047 // a few extra registers before we really run out which helps to avoid to trip over assertions.
1048 if (vreg_num + 20 >= LIR_Opr::vreg_max) {
1049 bailout("out of virtual registers in LIR generator");
1050 if (vreg_num + 2 >= LIR_Opr::vreg_max) {
1051 // Wrap it around and continue until bailout really happens to avoid hitting assertions.
1052 _virtual_register_number = LIR_Opr::vreg_base;
1053 vreg_num = LIR_Opr::vreg_base;
1054 }
1055 }
1056 _virtual_register_number += 1;
1057 LIR_Opr vreg = LIR_OprFact::virtual_register(vreg_num, type);
1058 assert(vreg != LIR_OprFact::illegal(), "ran out of virtual registers");
1059 return vreg;
1060 }
1061
1062
1063 // Try to lock using register in hint
1064 LIR_Opr LIRGenerator::rlock(Value instr) {
1065 return new_register(instr->type());
1066 }
1067
1068
1069 // does an rlock and sets result
1070 LIR_Opr LIRGenerator::rlock_result(Value x) {
1071 LIR_Opr reg = rlock(x);
1072 set_result(x, reg);
1073 return reg;
1074 }
1075
1076
1077 // does an rlock and sets result
1078 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1079 LIR_Opr reg;
1080 switch (type) {
1081 case T_BYTE:
1082 case T_BOOLEAN:
1083 reg = rlock_byte(type);
1084 break;
1085 default:
1086 reg = rlock(x);
1087 break;
1088 }
1089
1090 set_result(x, reg);
1091 return reg;
1092 }
1093
1094
1095 //---------------------------------------------------------------------
1096 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1097 ObjectType* oc = value->type()->as_ObjectType();
1098 if (oc) {
1099 return oc->constant_value();
1100 }
1101 return nullptr;
1102 }
1103
1104
1105 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1106 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1107 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1108
1109 // no moves are created for phi functions at the begin of exception
1110 // handlers, so assign operands manually here
1111 for_each_phi_fun(block(), phi,
1112 if (!phi->is_illegal()) { operand_for_instruction(phi); });
1113
1114 LIR_Opr thread_reg = getThreadPointer();
1115 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1116 exceptionOopOpr());
1117 __ move_wide(LIR_OprFact::oopConst(nullptr),
1118 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1119 __ move_wide(LIR_OprFact::oopConst(nullptr),
1120 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1121
1122 LIR_Opr result = new_register(T_OBJECT);
1123 __ move(exceptionOopOpr(), result);
1124 set_result(x, result);
1125 }
1126
1127
1128 //----------------------------------------------------------------------
1129 //----------------------------------------------------------------------
1130 //----------------------------------------------------------------------
1131 //----------------------------------------------------------------------
1132 // visitor functions
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135 //----------------------------------------------------------------------
1136 //----------------------------------------------------------------------
1137
1138 void LIRGenerator::do_Phi(Phi* x) {
1139 // phi functions are never visited directly
1140 ShouldNotReachHere();
1141 }
1142
1143
1144 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1145 void LIRGenerator::do_Constant(Constant* x) {
1146 if (x->state_before() != nullptr) {
1147 // Any constant with a ValueStack requires patching so emit the patch here
1148 LIR_Opr reg = rlock_result(x);
1149 CodeEmitInfo* info = state_for(x, x->state_before());
1150 __ oop2reg_patch(nullptr, reg, info);
1151 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1152 if (!x->is_pinned()) {
1153 // unpinned constants are handled specially so that they can be
1154 // put into registers when they are used multiple times within a
1155 // block. After the block completes their operand will be
1156 // cleared so that other blocks can't refer to that register.
1157 set_result(x, load_constant(x));
1158 } else {
1159 LIR_Opr res = x->operand();
1160 if (!res->is_valid()) {
1161 res = LIR_OprFact::value_type(x->type());
1162 }
1163 if (res->is_constant()) {
1164 LIR_Opr reg = rlock_result(x);
1165 __ move(res, reg);
1166 } else {
1167 set_result(x, res);
1168 }
1169 }
1170 } else {
1171 set_result(x, LIR_OprFact::value_type(x->type()));
1172 }
1173 }
1174
1175
1176 void LIRGenerator::do_Local(Local* x) {
1177 // operand_for_instruction has the side effect of setting the result
1178 // so there's no need to do it here.
1179 operand_for_instruction(x);
1180 }
1181
1182
1183 void LIRGenerator::do_Return(Return* x) {
1184 if (compilation()->env()->dtrace_method_probes()) {
1185 BasicTypeList signature;
1186 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1187 signature.append(T_METADATA); // Method*
1188 LIR_OprList* args = new LIR_OprList();
1189 args->append(getThreadPointer());
1190 LIR_Opr meth = new_register(T_METADATA);
1191 __ metadata2reg(method()->constant_encoding(), meth);
1192 args->append(meth);
1193 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, nullptr);
1194 }
1195
1196 if (x->type()->is_void()) {
1197 __ return_op(LIR_OprFact::illegalOpr);
1198 } else {
1199 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1200 LIRItem result(x->result(), this);
1201
1202 result.load_item_force(reg);
1203 __ return_op(result.result());
1204 }
1205 set_no_result(x);
1206 }
1207
1208 // Example: ref.get()
1209 // Combination of LoadField and g1 pre-write barrier
1210 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1211
1212 const int referent_offset = java_lang_ref_Reference::referent_offset();
1213
1214 assert(x->number_of_arguments() == 1, "wrong type");
1215
1216 LIRItem reference(x->argument_at(0), this);
1217 reference.load_item();
1218
1219 // need to perform the null check on the reference object
1220 CodeEmitInfo* info = nullptr;
1221 if (x->needs_null_check()) {
1222 info = state_for(x);
1223 }
1224
1225 LIR_Opr result = rlock_result(x, T_OBJECT);
1226 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT,
1227 reference, LIR_OprFact::intConst(referent_offset), result,
1228 nullptr, info);
1229 }
1230
1231 // Example: clazz.isInstance(object)
1232 void LIRGenerator::do_isInstance(Intrinsic* x) {
1233 assert(x->number_of_arguments() == 2, "wrong type");
1234
1235 // TODO could try to substitute this node with an equivalent InstanceOf
1236 // if clazz is known to be a constant Class. This will pick up newly found
1237 // constants after HIR construction. I'll leave this to a future change.
1238
1239 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1240 // could follow the aastore example in a future change.
1241
1242 LIRItem clazz(x->argument_at(0), this);
1243 LIRItem object(x->argument_at(1), this);
1244 clazz.load_item();
1245 object.load_item();
1246 LIR_Opr result = rlock_result(x);
1247
1248 // need to perform null check on clazz
1249 if (x->needs_null_check()) {
1250 CodeEmitInfo* info = state_for(x);
1251 __ null_check(clazz.result(), info);
1252 }
1253
1254 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1255 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1256 x->type(),
1257 nullptr); // null CodeEmitInfo results in a leaf call
1258 __ move(call_result, result);
1259 }
1260
1261 void LIRGenerator::load_klass(LIR_Opr obj, LIR_Opr klass, CodeEmitInfo* null_check_info) {
1262 __ load_klass(obj, klass, null_check_info);
1263 }
1264
1265 // Example: object.getClass ()
1266 void LIRGenerator::do_getClass(Intrinsic* x) {
1267 assert(x->number_of_arguments() == 1, "wrong type");
1268
1269 LIRItem rcvr(x->argument_at(0), this);
1270 rcvr.load_item();
1271 LIR_Opr temp = new_register(T_ADDRESS);
1272 LIR_Opr result = rlock_result(x);
1273
1274 // need to perform the null check on the rcvr
1275 CodeEmitInfo* info = nullptr;
1276 if (x->needs_null_check()) {
1277 info = state_for(x);
1278 }
1279
1280 LIR_Opr klass = new_register(T_METADATA);
1281 load_klass(rcvr.result(), klass, info);
1282 __ move_wide(new LIR_Address(klass, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp);
1283 // mirror = ((OopHandle)mirror)->resolve();
1284 access_load(IN_NATIVE, T_OBJECT,
1285 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result);
1286 }
1287
1288 // java.lang.Class::isPrimitive()
1289 void LIRGenerator::do_isPrimitive(Intrinsic* x) {
1290 assert(x->number_of_arguments() == 1, "wrong type");
1291
1292 LIRItem rcvr(x->argument_at(0), this);
1293 rcvr.load_item();
1294 LIR_Opr temp = new_register(T_METADATA);
1295 LIR_Opr result = rlock_result(x);
1296
1297 CodeEmitInfo* info = nullptr;
1298 if (x->needs_null_check()) {
1299 info = state_for(x);
1300 }
1301
1302 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset(), T_ADDRESS), temp, info);
1303 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::metadataConst(nullptr));
1304 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN);
1305 }
1306
1307 // Example: Foo.class.getModifiers()
1308 void LIRGenerator::do_getModifiers(Intrinsic* x) {
1309 assert(x->number_of_arguments() == 1, "wrong type");
1310
1311 LIRItem receiver(x->argument_at(0), this);
1312 receiver.load_item();
1313 LIR_Opr result = rlock_result(x);
1314
1315 CodeEmitInfo* info = nullptr;
1316 if (x->needs_null_check()) {
1317 info = state_for(x);
1318 }
1319
1320 // While reading off the universal constant mirror is less efficient than doing
1321 // another branch and returning the constant answer, this branchless code runs into
1322 // much less risk of confusion for C1 register allocator. The choice of the universe
1323 // object here is correct as long as it returns the same modifiers we would expect
1324 // from the primitive class itself. See spec for Class.getModifiers that provides
1325 // the typed array klasses with similar modifiers as their component types.
1326
1327 Klass* univ_klass = Universe::byteArrayKlass();
1328 assert(univ_klass->modifier_flags() == (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC), "Sanity");
1329 LIR_Opr prim_klass = LIR_OprFact::metadataConst(univ_klass);
1330
1331 LIR_Opr recv_klass = new_register(T_METADATA);
1332 __ move(new LIR_Address(receiver.result(), java_lang_Class::klass_offset(), T_ADDRESS), recv_klass, info);
1333
1334 // Check if this is a Java mirror of primitive type, and select the appropriate klass.
1335 LIR_Opr klass = new_register(T_METADATA);
1336 __ cmp(lir_cond_equal, recv_klass, LIR_OprFact::metadataConst(nullptr));
1337 __ cmove(lir_cond_equal, prim_klass, recv_klass, klass, T_ADDRESS);
1338
1339 // Get the answer.
1340 __ move(new LIR_Address(klass, in_bytes(Klass::modifier_flags_offset()), T_INT), result);
1341 }
1342
1343 void LIRGenerator::do_getObjectSize(Intrinsic* x) {
1344 assert(x->number_of_arguments() == 3, "wrong type");
1345 LIR_Opr result_reg = rlock_result(x);
1346
1347 LIRItem value(x->argument_at(2), this);
1348 value.load_item();
1349
1350 LIR_Opr klass = new_register(T_METADATA);
1351 load_klass(value.result(), klass, nullptr);
1352 LIR_Opr layout = new_register(T_INT);
1353 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
1354
1355 LabelObj* L_done = new LabelObj();
1356 LabelObj* L_array = new LabelObj();
1357
1358 __ cmp(lir_cond_lessEqual, layout, 0);
1359 __ branch(lir_cond_lessEqual, L_array->label());
1360
1361 // Instance case: the layout helper gives us instance size almost directly,
1362 // but we need to mask out the _lh_instance_slow_path_bit.
1363
1364 assert((int) Klass::_lh_instance_slow_path_bit < BytesPerLong, "clear bit");
1365
1366 LIR_Opr mask = load_immediate(~(jint) right_n_bits(LogBytesPerLong), T_INT);
1367 __ logical_and(layout, mask, layout);
1368 __ convert(Bytecodes::_i2l, layout, result_reg);
1369
1370 __ branch(lir_cond_always, L_done->label());
1371
1372 // Array case: size is round(header + element_size*arraylength).
1373 // Since arraylength is different for every array instance, we have to
1374 // compute the whole thing at runtime.
1375
1376 __ branch_destination(L_array->label());
1377
1378 int round_mask = MinObjAlignmentInBytes - 1;
1379
1380 // Figure out header sizes first.
1381 LIR_Opr hss = load_immediate(Klass::_lh_header_size_shift, T_INT);
1382 LIR_Opr hsm = load_immediate(Klass::_lh_header_size_mask, T_INT);
1383
1384 LIR_Opr header_size = new_register(T_INT);
1385 __ move(layout, header_size);
1386 LIR_Opr tmp = new_register(T_INT);
1387 __ unsigned_shift_right(header_size, hss, header_size, tmp);
1388 __ logical_and(header_size, hsm, header_size);
1389 __ add(header_size, LIR_OprFact::intConst(round_mask), header_size);
1390
1391 // Figure out the array length in bytes
1392 assert(Klass::_lh_log2_element_size_shift == 0, "use shift in place");
1393 LIR_Opr l2esm = load_immediate(Klass::_lh_log2_element_size_mask, T_INT);
1394 __ logical_and(layout, l2esm, layout);
1395
1396 LIR_Opr length_int = new_register(T_INT);
1397 __ move(new LIR_Address(value.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), length_int);
1398
1399 #ifdef _LP64
1400 LIR_Opr length = new_register(T_LONG);
1401 __ convert(Bytecodes::_i2l, length_int, length);
1402 #endif
1403
1404 // Shift-left awkwardness. Normally it is just:
1405 // __ shift_left(length, layout, length);
1406 // But C1 cannot perform shift_left with non-constant count, so we end up
1407 // doing the per-bit loop dance here. x86_32 also does not know how to shift
1408 // longs, so we have to act on ints.
1409 LabelObj* L_shift_loop = new LabelObj();
1410 LabelObj* L_shift_exit = new LabelObj();
1411
1412 __ branch_destination(L_shift_loop->label());
1413 __ cmp(lir_cond_equal, layout, 0);
1414 __ branch(lir_cond_equal, L_shift_exit->label());
1415
1416 #ifdef _LP64
1417 __ shift_left(length, 1, length);
1418 #else
1419 __ shift_left(length_int, 1, length_int);
1420 #endif
1421
1422 __ sub(layout, LIR_OprFact::intConst(1), layout);
1423
1424 __ branch(lir_cond_always, L_shift_loop->label());
1425 __ branch_destination(L_shift_exit->label());
1426
1427 // Mix all up, round, and push to the result.
1428 #ifdef _LP64
1429 LIR_Opr header_size_long = new_register(T_LONG);
1430 __ convert(Bytecodes::_i2l, header_size, header_size_long);
1431 __ add(length, header_size_long, length);
1432 if (round_mask != 0) {
1433 LIR_Opr round_mask_opr = load_immediate(~(jlong)round_mask, T_LONG);
1434 __ logical_and(length, round_mask_opr, length);
1435 }
1436 __ move(length, result_reg);
1437 #else
1438 __ add(length_int, header_size, length_int);
1439 if (round_mask != 0) {
1440 LIR_Opr round_mask_opr = load_immediate(~round_mask, T_INT);
1441 __ logical_and(length_int, round_mask_opr, length_int);
1442 }
1443 __ convert(Bytecodes::_i2l, length_int, result_reg);
1444 #endif
1445
1446 __ branch_destination(L_done->label());
1447 }
1448
1449 void LIRGenerator::do_scopedValueCache(Intrinsic* x) {
1450 do_JavaThreadField(x, JavaThread::scopedValueCache_offset());
1451 }
1452
1453 // Example: Thread.currentCarrierThread()
1454 void LIRGenerator::do_currentCarrierThread(Intrinsic* x) {
1455 do_JavaThreadField(x, JavaThread::threadObj_offset());
1456 }
1457
1458 void LIRGenerator::do_vthread(Intrinsic* x) {
1459 do_JavaThreadField(x, JavaThread::vthread_offset());
1460 }
1461
1462 void LIRGenerator::do_JavaThreadField(Intrinsic* x, ByteSize offset) {
1463 assert(x->number_of_arguments() == 0, "wrong type");
1464 LIR_Opr temp = new_register(T_ADDRESS);
1465 LIR_Opr reg = rlock_result(x);
1466 __ move(new LIR_Address(getThreadPointer(), in_bytes(offset), T_ADDRESS), temp);
1467 access_load(IN_NATIVE, T_OBJECT,
1468 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), reg);
1469 }
1470
1471 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1472 assert(x->number_of_arguments() == 1, "wrong type");
1473 LIRItem receiver(x->argument_at(0), this);
1474
1475 receiver.load_item();
1476 BasicTypeList signature;
1477 signature.append(T_OBJECT); // receiver
1478 LIR_OprList* args = new LIR_OprList();
1479 args->append(receiver.result());
1480 CodeEmitInfo* info = state_for(x, x->state());
1481 call_runtime(&signature, args,
1482 CAST_FROM_FN_PTR(address, Runtime1::entry_for(C1StubId::register_finalizer_id)),
1483 voidType, info);
1484
1485 set_no_result(x);
1486 }
1487
1488
1489 //------------------------local access--------------------------------------
1490
1491 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1492 if (x->operand()->is_illegal()) {
1493 Constant* c = x->as_Constant();
1494 if (c != nullptr) {
1495 x->set_operand(LIR_OprFact::value_type(c->type()));
1496 } else {
1497 assert(x->as_Phi() || x->as_Local() != nullptr, "only for Phi and Local");
1498 // allocate a virtual register for this local or phi
1499 x->set_operand(rlock(x));
1500 #ifdef ASSERT
1501 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, nullptr);
1502 #endif
1503 }
1504 }
1505 return x->operand();
1506 }
1507
1508 #ifdef ASSERT
1509 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1510 if (reg_num < _instruction_for_operand.length()) {
1511 return _instruction_for_operand.at(reg_num);
1512 }
1513 return nullptr;
1514 }
1515 #endif
1516
1517 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1518 if (_vreg_flags.size_in_bits() == 0) {
1519 BitMap2D temp(100, num_vreg_flags);
1520 _vreg_flags = temp;
1521 }
1522 _vreg_flags.at_put_grow(vreg_num, f, true);
1523 }
1524
1525 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1526 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1527 return false;
1528 }
1529 return _vreg_flags.at(vreg_num, f);
1530 }
1531
1532
1533 // Block local constant handling. This code is useful for keeping
1534 // unpinned constants and constants which aren't exposed in the IR in
1535 // registers. Unpinned Constant instructions have their operands
1536 // cleared when the block is finished so that other blocks can't end
1537 // up referring to their registers.
1538
1539 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1540 assert(!x->is_pinned(), "only for unpinned constants");
1541 _unpinned_constants.append(x);
1542 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1543 }
1544
1545
1546 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1547 BasicType t = c->type();
1548 for (int i = 0; i < _constants.length(); i++) {
1549 LIR_Const* other = _constants.at(i);
1550 if (t == other->type()) {
1551 switch (t) {
1552 case T_INT:
1553 case T_FLOAT:
1554 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1555 break;
1556 case T_LONG:
1557 case T_DOUBLE:
1558 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1559 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1560 break;
1561 case T_OBJECT:
1562 if (c->as_jobject() != other->as_jobject()) continue;
1563 break;
1564 default:
1565 break;
1566 }
1567 return _reg_for_constants.at(i);
1568 }
1569 }
1570
1571 LIR_Opr result = new_register(t);
1572 __ move((LIR_Opr)c, result);
1573 _constants.append(c);
1574 _reg_for_constants.append(result);
1575 return result;
1576 }
1577
1578 //------------------------field access--------------------------------------
1579
1580 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
1581 assert(x->number_of_arguments() == 4, "wrong type");
1582 LIRItem obj (x->argument_at(0), this); // object
1583 LIRItem offset(x->argument_at(1), this); // offset of field
1584 LIRItem cmp (x->argument_at(2), this); // value to compare with field
1585 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
1586 assert(obj.type()->tag() == objectTag, "invalid type");
1587 assert(cmp.type()->tag() == type->tag(), "invalid type");
1588 assert(val.type()->tag() == type->tag(), "invalid type");
1589
1590 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type),
1591 obj, offset, cmp, val);
1592 set_result(x, result);
1593 }
1594
1595 // Comment copied form templateTable_i486.cpp
1596 // ----------------------------------------------------------------------------
1597 // Volatile variables demand their effects be made known to all CPU's in
1598 // order. Store buffers on most chips allow reads & writes to reorder; the
1599 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1600 // memory barrier (i.e., it's not sufficient that the interpreter does not
1601 // reorder volatile references, the hardware also must not reorder them).
1602 //
1603 // According to the new Java Memory Model (JMM):
1604 // (1) All volatiles are serialized wrt to each other.
1605 // ALSO reads & writes act as acquire & release, so:
1606 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1607 // the read float up to before the read. It's OK for non-volatile memory refs
1608 // that happen before the volatile read to float down below it.
1609 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1610 // that happen BEFORE the write float down to after the write. It's OK for
1611 // non-volatile memory refs that happen after the volatile write to float up
1612 // before it.
1613 //
1614 // We only put in barriers around volatile refs (they are expensive), not
1615 // _between_ memory refs (that would require us to track the flavor of the
1616 // previous memory refs). Requirements (2) and (3) require some barriers
1617 // before volatile stores and after volatile loads. These nearly cover
1618 // requirement (1) but miss the volatile-store-volatile-load case. This final
1619 // case is placed after volatile-stores although it could just as well go
1620 // before volatile-loads.
1621
1622
1623 void LIRGenerator::do_StoreField(StoreField* x) {
1624 bool needs_patching = x->needs_patching();
1625 bool is_volatile = x->field()->is_volatile();
1626 BasicType field_type = x->field_type();
1627
1628 CodeEmitInfo* info = nullptr;
1629 if (needs_patching) {
1630 assert(x->explicit_null_check() == nullptr, "can't fold null check into patching field access");
1631 info = state_for(x, x->state_before());
1632 } else if (x->needs_null_check()) {
1633 NullCheck* nc = x->explicit_null_check();
1634 if (nc == nullptr) {
1635 info = state_for(x);
1636 } else {
1637 info = state_for(nc);
1638 }
1639 }
1640
1641 LIRItem object(x->obj(), this);
1642 LIRItem value(x->value(), this);
1643
1644 object.load_item();
1645
1646 if (is_volatile || needs_patching) {
1647 // load item if field is volatile (fewer special cases for volatiles)
1648 // load item if field not initialized
1649 // load item if field not constant
1650 // because of code patching we cannot inline constants
1651 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1652 value.load_byte_item();
1653 } else {
1654 value.load_item();
1655 }
1656 } else {
1657 value.load_for_store(field_type);
1658 }
1659
1660 set_no_result(x);
1661
1662 #ifndef PRODUCT
1663 if (PrintNotLoaded && needs_patching) {
1664 tty->print_cr(" ###class not loaded at store_%s bci %d",
1665 x->is_static() ? "static" : "field", x->printable_bci());
1666 }
1667 #endif
1668
1669 if (x->needs_null_check() &&
1670 (needs_patching ||
1671 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1672 // Emit an explicit null check because the offset is too large.
1673 // If the class is not loaded and the object is null, we need to deoptimize to throw a
1674 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1675 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1676 }
1677
1678 DecoratorSet decorators = IN_HEAP;
1679 if (is_volatile) {
1680 decorators |= MO_SEQ_CST;
1681 }
1682 if (needs_patching) {
1683 decorators |= C1_NEEDS_PATCHING;
1684 }
1685
1686 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()),
1687 value.result(), info != nullptr ? new CodeEmitInfo(info) : nullptr, info);
1688 }
1689
1690 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
1691 assert(x->is_pinned(),"");
1692 bool needs_range_check = x->compute_needs_range_check();
1693 bool use_length = x->length() != nullptr;
1694 bool obj_store = is_reference_type(x->elt_type());
1695 bool needs_store_check = obj_store && (x->value()->as_Constant() == nullptr ||
1696 !get_jobject_constant(x->value())->is_null_object() ||
1697 x->should_profile());
1698
1699 LIRItem array(x->array(), this);
1700 LIRItem index(x->index(), this);
1701 LIRItem value(x->value(), this);
1702 LIRItem length(this);
1703
1704 array.load_item();
1705 index.load_nonconstant();
1706
1707 if (use_length && needs_range_check) {
1708 length.set_instruction(x->length());
1709 length.load_item();
1710
1711 }
1712 if (needs_store_check || x->check_boolean()) {
1713 value.load_item();
1714 } else {
1715 value.load_for_store(x->elt_type());
1716 }
1717
1718 set_no_result(x);
1719
1720 // the CodeEmitInfo must be duplicated for each different
1721 // LIR-instruction because spilling can occur anywhere between two
1722 // instructions and so the debug information must be different
1723 CodeEmitInfo* range_check_info = state_for(x);
1724 CodeEmitInfo* null_check_info = nullptr;
1725 if (x->needs_null_check()) {
1726 null_check_info = new CodeEmitInfo(range_check_info);
1727 }
1728
1729 if (needs_range_check) {
1730 if (use_length) {
1731 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1732 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
1733 } else {
1734 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1735 // range_check also does the null check
1736 null_check_info = nullptr;
1737 }
1738 }
1739
1740 if (GenerateArrayStoreCheck && needs_store_check) {
1741 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
1742 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci());
1743 }
1744
1745 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1746 if (x->check_boolean()) {
1747 decorators |= C1_MASK_BOOLEAN;
1748 }
1749
1750 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(),
1751 nullptr, null_check_info);
1752 }
1753
1754 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type,
1755 LIRItem& base, LIR_Opr offset, LIR_Opr result,
1756 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) {
1757 decorators |= ACCESS_READ;
1758 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info);
1759 if (access.is_raw()) {
1760 _barrier_set->BarrierSetC1::load_at(access, result);
1761 } else {
1762 _barrier_set->load_at(access, result);
1763 }
1764 }
1765
1766 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type,
1767 LIR_Opr addr, LIR_Opr result) {
1768 decorators |= ACCESS_READ;
1769 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type);
1770 access.set_resolved_addr(addr);
1771 if (access.is_raw()) {
1772 _barrier_set->BarrierSetC1::load(access, result);
1773 } else {
1774 _barrier_set->load(access, result);
1775 }
1776 }
1777
1778 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type,
1779 LIRItem& base, LIR_Opr offset, LIR_Opr value,
1780 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
1781 decorators |= ACCESS_WRITE;
1782 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info);
1783 if (access.is_raw()) {
1784 _barrier_set->BarrierSetC1::store_at(access, value);
1785 } else {
1786 _barrier_set->store_at(access, value);
1787 }
1788 }
1789
1790 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type,
1791 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
1792 decorators |= ACCESS_READ;
1793 decorators |= ACCESS_WRITE;
1794 // Atomic operations are SEQ_CST by default
1795 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1796 LIRAccess access(this, decorators, base, offset, type);
1797 if (access.is_raw()) {
1798 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value);
1799 } else {
1800 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value);
1801 }
1802 }
1803
1804 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type,
1805 LIRItem& base, LIRItem& offset, LIRItem& value) {
1806 decorators |= ACCESS_READ;
1807 decorators |= ACCESS_WRITE;
1808 // Atomic operations are SEQ_CST by default
1809 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1810 LIRAccess access(this, decorators, base, offset, type);
1811 if (access.is_raw()) {
1812 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value);
1813 } else {
1814 return _barrier_set->atomic_xchg_at(access, value);
1815 }
1816 }
1817
1818 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type,
1819 LIRItem& base, LIRItem& offset, LIRItem& value) {
1820 decorators |= ACCESS_READ;
1821 decorators |= ACCESS_WRITE;
1822 // Atomic operations are SEQ_CST by default
1823 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1824 LIRAccess access(this, decorators, base, offset, type);
1825 if (access.is_raw()) {
1826 return _barrier_set->BarrierSetC1::atomic_add_at(access, value);
1827 } else {
1828 return _barrier_set->atomic_add_at(access, value);
1829 }
1830 }
1831
1832 void LIRGenerator::do_LoadField(LoadField* x) {
1833 bool needs_patching = x->needs_patching();
1834 bool is_volatile = x->field()->is_volatile();
1835 BasicType field_type = x->field_type();
1836
1837 CodeEmitInfo* info = nullptr;
1838 if (needs_patching) {
1839 assert(x->explicit_null_check() == nullptr, "can't fold null check into patching field access");
1840 info = state_for(x, x->state_before());
1841 } else if (x->needs_null_check()) {
1842 NullCheck* nc = x->explicit_null_check();
1843 if (nc == nullptr) {
1844 info = state_for(x);
1845 } else {
1846 info = state_for(nc);
1847 }
1848 }
1849
1850 LIRItem object(x->obj(), this);
1851
1852 object.load_item();
1853
1854 #ifndef PRODUCT
1855 if (PrintNotLoaded && needs_patching) {
1856 tty->print_cr(" ###class not loaded at load_%s bci %d",
1857 x->is_static() ? "static" : "field", x->printable_bci());
1858 }
1859 #endif
1860
1861 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1862 if (x->needs_null_check() &&
1863 (needs_patching ||
1864 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1865 stress_deopt)) {
1866 LIR_Opr obj = object.result();
1867 if (stress_deopt) {
1868 obj = new_register(T_OBJECT);
1869 __ move(LIR_OprFact::oopConst(nullptr), obj);
1870 }
1871 // Emit an explicit null check because the offset is too large.
1872 // If the class is not loaded and the object is null, we need to deoptimize to throw a
1873 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1874 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1875 }
1876
1877 DecoratorSet decorators = IN_HEAP;
1878 if (is_volatile) {
1879 decorators |= MO_SEQ_CST;
1880 }
1881 if (needs_patching) {
1882 decorators |= C1_NEEDS_PATCHING;
1883 }
1884
1885 LIR_Opr result = rlock_result(x, field_type);
1886 access_load_at(decorators, field_type,
1887 object, LIR_OprFact::intConst(x->offset()), result,
1888 info ? new CodeEmitInfo(info) : nullptr, info);
1889 }
1890
1891 // int/long jdk.internal.util.Preconditions.checkIndex
1892 void LIRGenerator::do_PreconditionsCheckIndex(Intrinsic* x, BasicType type) {
1893 assert(x->number_of_arguments() == 3, "wrong type");
1894 LIRItem index(x->argument_at(0), this);
1895 LIRItem length(x->argument_at(1), this);
1896 LIRItem oobef(x->argument_at(2), this);
1897
1898 index.load_item();
1899 length.load_item();
1900 oobef.load_item();
1901
1902 LIR_Opr result = rlock_result(x);
1903 // x->state() is created from copy_state_for_exception, it does not contains arguments
1904 // we should prepare them before entering into interpreter mode due to deoptimization.
1905 ValueStack* state = x->state();
1906 for (int i = 0; i < x->number_of_arguments(); i++) {
1907 Value arg = x->argument_at(i);
1908 state->push(arg->type(), arg);
1909 }
1910 CodeEmitInfo* info = state_for(x, state);
1911
1912 LIR_Opr len = length.result();
1913 LIR_Opr zero;
1914 if (type == T_INT) {
1915 zero = LIR_OprFact::intConst(0);
1916 if (length.result()->is_constant()){
1917 len = LIR_OprFact::intConst(length.result()->as_jint());
1918 }
1919 } else {
1920 assert(type == T_LONG, "sanity check");
1921 zero = LIR_OprFact::longConst(0);
1922 if (length.result()->is_constant()){
1923 len = LIR_OprFact::longConst(length.result()->as_jlong());
1924 }
1925 }
1926 // C1 can not handle the case that comparing index with constant value while condition
1927 // is neither lir_cond_equal nor lir_cond_notEqual, see LIR_Assembler::comp_op.
1928 LIR_Opr zero_reg = new_register(type);
1929 __ move(zero, zero_reg);
1930 #if defined(X86) && !defined(_LP64)
1931 // BEWARE! On 32-bit x86 cmp clobbers its left argument so we need a temp copy.
1932 LIR_Opr index_copy = new_register(index.type());
1933 // index >= 0
1934 __ move(index.result(), index_copy);
1935 __ cmp(lir_cond_less, index_copy, zero_reg);
1936 __ branch(lir_cond_less, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1937 Deoptimization::Action_make_not_entrant));
1938 // index < length
1939 __ move(index.result(), index_copy);
1940 __ cmp(lir_cond_greaterEqual, index_copy, len);
1941 __ branch(lir_cond_greaterEqual, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1942 Deoptimization::Action_make_not_entrant));
1943 #else
1944 // index >= 0
1945 __ cmp(lir_cond_less, index.result(), zero_reg);
1946 __ branch(lir_cond_less, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1947 Deoptimization::Action_make_not_entrant));
1948 // index < length
1949 __ cmp(lir_cond_greaterEqual, index.result(), len);
1950 __ branch(lir_cond_greaterEqual, new DeoptimizeStub(info, Deoptimization::Reason_range_check,
1951 Deoptimization::Action_make_not_entrant));
1952 #endif
1953 __ move(index.result(), result);
1954 }
1955
1956 //------------------------array access--------------------------------------
1957
1958
1959 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1960 LIRItem array(x->array(), this);
1961 array.load_item();
1962 LIR_Opr reg = rlock_result(x);
1963
1964 CodeEmitInfo* info = nullptr;
1965 if (x->needs_null_check()) {
1966 NullCheck* nc = x->explicit_null_check();
1967 if (nc == nullptr) {
1968 info = state_for(x);
1969 } else {
1970 info = state_for(nc);
1971 }
1972 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1973 LIR_Opr obj = new_register(T_OBJECT);
1974 __ move(LIR_OprFact::oopConst(nullptr), obj);
1975 __ null_check(obj, new CodeEmitInfo(info));
1976 }
1977 }
1978 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1979 }
1980
1981
1982 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1983 bool use_length = x->length() != nullptr;
1984 LIRItem array(x->array(), this);
1985 LIRItem index(x->index(), this);
1986 LIRItem length(this);
1987 bool needs_range_check = x->compute_needs_range_check();
1988
1989 if (use_length && needs_range_check) {
1990 length.set_instruction(x->length());
1991 length.load_item();
1992 }
1993
1994 array.load_item();
1995 if (index.is_constant() && can_inline_as_constant(x->index())) {
1996 // let it be a constant
1997 index.dont_load_item();
1998 } else {
1999 index.load_item();
2000 }
2001
2002 CodeEmitInfo* range_check_info = state_for(x);
2003 CodeEmitInfo* null_check_info = nullptr;
2004 if (x->needs_null_check()) {
2005 NullCheck* nc = x->explicit_null_check();
2006 if (nc != nullptr) {
2007 null_check_info = state_for(nc);
2008 } else {
2009 null_check_info = range_check_info;
2010 }
2011 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
2012 LIR_Opr obj = new_register(T_OBJECT);
2013 __ move(LIR_OprFact::oopConst(nullptr), obj);
2014 __ null_check(obj, new CodeEmitInfo(null_check_info));
2015 }
2016 }
2017
2018 if (needs_range_check) {
2019 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
2020 __ branch(lir_cond_always, new RangeCheckStub(range_check_info, index.result(), array.result()));
2021 } else if (use_length) {
2022 // TODO: use a (modified) version of array_range_check that does not require a
2023 // constant length to be loaded to a register
2024 __ cmp(lir_cond_belowEqual, length.result(), index.result());
2025 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
2026 } else {
2027 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
2028 // The range check performs the null check, so clear it out for the load
2029 null_check_info = nullptr;
2030 }
2031 }
2032
2033 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
2034
2035 LIR_Opr result = rlock_result(x, x->elt_type());
2036 access_load_at(decorators, x->elt_type(),
2037 array, index.result(), result,
2038 nullptr, null_check_info);
2039 }
2040
2041
2042 void LIRGenerator::do_NullCheck(NullCheck* x) {
2043 if (x->can_trap()) {
2044 LIRItem value(x->obj(), this);
2045 value.load_item();
2046 CodeEmitInfo* info = state_for(x);
2047 __ null_check(value.result(), info);
2048 }
2049 }
2050
2051
2052 void LIRGenerator::do_TypeCast(TypeCast* x) {
2053 LIRItem value(x->obj(), this);
2054 value.load_item();
2055 // the result is the same as from the node we are casting
2056 set_result(x, value.result());
2057 }
2058
2059
2060 void LIRGenerator::do_Throw(Throw* x) {
2061 LIRItem exception(x->exception(), this);
2062 exception.load_item();
2063 set_no_result(x);
2064 LIR_Opr exception_opr = exception.result();
2065 CodeEmitInfo* info = state_for(x, x->state());
2066
2067 #ifndef PRODUCT
2068 if (PrintC1Statistics) {
2069 increment_counter(Runtime1::throw_count_address(), T_INT);
2070 }
2071 #endif
2072
2073 // check if the instruction has an xhandler in any of the nested scopes
2074 bool unwind = false;
2075 if (info->exception_handlers()->length() == 0) {
2076 // this throw is not inside an xhandler
2077 unwind = true;
2078 } else {
2079 // get some idea of the throw type
2080 bool type_is_exact = true;
2081 ciType* throw_type = x->exception()->exact_type();
2082 if (throw_type == nullptr) {
2083 type_is_exact = false;
2084 throw_type = x->exception()->declared_type();
2085 }
2086 if (throw_type != nullptr && throw_type->is_instance_klass()) {
2087 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
2088 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
2089 }
2090 }
2091
2092 // do null check before moving exception oop into fixed register
2093 // to avoid a fixed interval with an oop during the null check.
2094 // Use a copy of the CodeEmitInfo because debug information is
2095 // different for null_check and throw.
2096 if (x->exception()->as_NewInstance() == nullptr && x->exception()->as_ExceptionObject() == nullptr) {
2097 // if the exception object wasn't created using new then it might be null.
2098 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
2099 }
2100
2101 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2102 // we need to go through the exception lookup path to get JVMTI
2103 // notification done
2104 unwind = false;
2105 }
2106
2107 // move exception oop into fixed register
2108 __ move(exception_opr, exceptionOopOpr());
2109
2110 if (unwind) {
2111 __ unwind_exception(exceptionOopOpr());
2112 } else {
2113 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2114 }
2115 }
2116
2117
2118 void LIRGenerator::do_RoundFP(RoundFP* x) {
2119 assert(strict_fp_requires_explicit_rounding, "not required");
2120
2121 LIRItem input(x->input(), this);
2122 input.load_item();
2123 LIR_Opr input_opr = input.result();
2124 assert(input_opr->is_register(), "why round if value is not in a register?");
2125 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2126 if (input_opr->is_single_fpu()) {
2127 set_result(x, round_item(input_opr)); // This code path not currently taken
2128 } else {
2129 LIR_Opr result = new_register(T_DOUBLE);
2130 set_vreg_flag(result, must_start_in_memory);
2131 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2132 set_result(x, result);
2133 }
2134 }
2135
2136
2137 void LIRGenerator::do_UnsafeGet(UnsafeGet* x) {
2138 BasicType type = x->basic_type();
2139 LIRItem src(x->object(), this);
2140 LIRItem off(x->offset(), this);
2141
2142 off.load_item();
2143 src.load_item();
2144
2145 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2146
2147 if (x->is_volatile()) {
2148 decorators |= MO_SEQ_CST;
2149 }
2150 if (type == T_BOOLEAN) {
2151 decorators |= C1_MASK_BOOLEAN;
2152 }
2153 if (is_reference_type(type)) {
2154 decorators |= ON_UNKNOWN_OOP_REF;
2155 }
2156
2157 LIR_Opr result = rlock_result(x, type);
2158 if (!x->is_raw()) {
2159 access_load_at(decorators, type, src, off.result(), result);
2160 } else {
2161 // Currently it is only used in GraphBuilder::setup_osr_entry_block.
2162 // It reads the value from [src + offset] directly.
2163 #ifdef _LP64
2164 LIR_Opr offset = new_register(T_LONG);
2165 __ convert(Bytecodes::_i2l, off.result(), offset);
2166 #else
2167 LIR_Opr offset = off.result();
2168 #endif
2169 LIR_Address* addr = new LIR_Address(src.result(), offset, type);
2170 if (is_reference_type(type)) {
2171 __ move_wide(addr, result);
2172 } else {
2173 __ move(addr, result);
2174 }
2175 }
2176 }
2177
2178
2179 void LIRGenerator::do_UnsafePut(UnsafePut* x) {
2180 BasicType type = x->basic_type();
2181 LIRItem src(x->object(), this);
2182 LIRItem off(x->offset(), this);
2183 LIRItem data(x->value(), this);
2184
2185 src.load_item();
2186 if (type == T_BOOLEAN || type == T_BYTE) {
2187 data.load_byte_item();
2188 } else {
2189 data.load_item();
2190 }
2191 off.load_item();
2192
2193 set_no_result(x);
2194
2195 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2196 if (is_reference_type(type)) {
2197 decorators |= ON_UNKNOWN_OOP_REF;
2198 }
2199 if (x->is_volatile()) {
2200 decorators |= MO_SEQ_CST;
2201 }
2202 access_store_at(decorators, type, src, off.result(), data.result());
2203 }
2204
2205 void LIRGenerator::do_UnsafeGetAndSet(UnsafeGetAndSet* x) {
2206 BasicType type = x->basic_type();
2207 LIRItem src(x->object(), this);
2208 LIRItem off(x->offset(), this);
2209 LIRItem value(x->value(), this);
2210
2211 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS | MO_SEQ_CST;
2212
2213 if (is_reference_type(type)) {
2214 decorators |= ON_UNKNOWN_OOP_REF;
2215 }
2216
2217 LIR_Opr result;
2218 if (x->is_add()) {
2219 result = access_atomic_add_at(decorators, type, src, off, value);
2220 } else {
2221 result = access_atomic_xchg_at(decorators, type, src, off, value);
2222 }
2223 set_result(x, result);
2224 }
2225
2226 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2227 int lng = x->length();
2228
2229 for (int i = 0; i < lng; i++) {
2230 C1SwitchRange* one_range = x->at(i);
2231 int low_key = one_range->low_key();
2232 int high_key = one_range->high_key();
2233 BlockBegin* dest = one_range->sux();
2234 if (low_key == high_key) {
2235 __ cmp(lir_cond_equal, value, low_key);
2236 __ branch(lir_cond_equal, dest);
2237 } else if (high_key - low_key == 1) {
2238 __ cmp(lir_cond_equal, value, low_key);
2239 __ branch(lir_cond_equal, dest);
2240 __ cmp(lir_cond_equal, value, high_key);
2241 __ branch(lir_cond_equal, dest);
2242 } else {
2243 LabelObj* L = new LabelObj();
2244 __ cmp(lir_cond_less, value, low_key);
2245 __ branch(lir_cond_less, L->label());
2246 __ cmp(lir_cond_lessEqual, value, high_key);
2247 __ branch(lir_cond_lessEqual, dest);
2248 __ branch_destination(L->label());
2249 }
2250 }
2251 __ jump(default_sux);
2252 }
2253
2254
2255 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2256 SwitchRangeList* res = new SwitchRangeList();
2257 int len = x->length();
2258 if (len > 0) {
2259 BlockBegin* sux = x->sux_at(0);
2260 int low = x->lo_key();
2261 BlockBegin* default_sux = x->default_sux();
2262 C1SwitchRange* range = new C1SwitchRange(low, sux);
2263 for (int i = 0; i < len; i++) {
2264 int key = low + i;
2265 BlockBegin* new_sux = x->sux_at(i);
2266 if (sux == new_sux) {
2267 // still in same range
2268 range->set_high_key(key);
2269 } else {
2270 // skip tests which explicitly dispatch to the default
2271 if (sux != default_sux) {
2272 res->append(range);
2273 }
2274 range = new C1SwitchRange(key, new_sux);
2275 }
2276 sux = new_sux;
2277 }
2278 if (res->length() == 0 || res->last() != range) res->append(range);
2279 }
2280 return res;
2281 }
2282
2283
2284 // we expect the keys to be sorted by increasing value
2285 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2286 SwitchRangeList* res = new SwitchRangeList();
2287 int len = x->length();
2288 if (len > 0) {
2289 BlockBegin* default_sux = x->default_sux();
2290 int key = x->key_at(0);
2291 BlockBegin* sux = x->sux_at(0);
2292 C1SwitchRange* range = new C1SwitchRange(key, sux);
2293 for (int i = 1; i < len; i++) {
2294 int new_key = x->key_at(i);
2295 BlockBegin* new_sux = x->sux_at(i);
2296 if (key+1 == new_key && sux == new_sux) {
2297 // still in same range
2298 range->set_high_key(new_key);
2299 } else {
2300 // skip tests which explicitly dispatch to the default
2301 if (range->sux() != default_sux) {
2302 res->append(range);
2303 }
2304 range = new C1SwitchRange(new_key, new_sux);
2305 }
2306 key = new_key;
2307 sux = new_sux;
2308 }
2309 if (res->length() == 0 || res->last() != range) res->append(range);
2310 }
2311 return res;
2312 }
2313
2314
2315 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2316 LIRItem tag(x->tag(), this);
2317 tag.load_item();
2318 set_no_result(x);
2319
2320 if (x->is_safepoint()) {
2321 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2322 }
2323
2324 // move values into phi locations
2325 move_to_phi(x->state());
2326
2327 int lo_key = x->lo_key();
2328 int len = x->length();
2329 assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
2330 LIR_Opr value = tag.result();
2331
2332 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2333 ciMethod* method = x->state()->scope()->method();
2334 ciMethodData* md = method->method_data_or_null();
2335 assert(md != nullptr, "Sanity");
2336 ciProfileData* data = md->bci_to_data(x->state()->bci());
2337 assert(data != nullptr, "must have profiling data");
2338 assert(data->is_MultiBranchData(), "bad profile data?");
2339 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2340 LIR_Opr md_reg = new_register(T_METADATA);
2341 __ metadata2reg(md->constant_encoding(), md_reg);
2342 LIR_Opr data_offset_reg = new_pointer_register();
2343 LIR_Opr tmp_reg = new_pointer_register();
2344
2345 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2346 for (int i = 0; i < len; i++) {
2347 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2348 __ cmp(lir_cond_equal, value, i + lo_key);
2349 __ move(data_offset_reg, tmp_reg);
2350 __ cmove(lir_cond_equal,
2351 LIR_OprFact::intptrConst(count_offset),
2352 tmp_reg,
2353 data_offset_reg, T_INT);
2354 }
2355
2356 LIR_Opr data_reg = new_pointer_register();
2357 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2358 __ move(data_addr, data_reg);
2359 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2360 __ move(data_reg, data_addr);
2361 }
2362
2363 if (UseTableRanges) {
2364 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2365 } else {
2366 for (int i = 0; i < len; i++) {
2367 __ cmp(lir_cond_equal, value, i + lo_key);
2368 __ branch(lir_cond_equal, x->sux_at(i));
2369 }
2370 __ jump(x->default_sux());
2371 }
2372 }
2373
2374
2375 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2376 LIRItem tag(x->tag(), this);
2377 tag.load_item();
2378 set_no_result(x);
2379
2380 if (x->is_safepoint()) {
2381 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2382 }
2383
2384 // move values into phi locations
2385 move_to_phi(x->state());
2386
2387 LIR_Opr value = tag.result();
2388 int len = x->length();
2389
2390 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2391 ciMethod* method = x->state()->scope()->method();
2392 ciMethodData* md = method->method_data_or_null();
2393 assert(md != nullptr, "Sanity");
2394 ciProfileData* data = md->bci_to_data(x->state()->bci());
2395 assert(data != nullptr, "must have profiling data");
2396 assert(data->is_MultiBranchData(), "bad profile data?");
2397 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2398 LIR_Opr md_reg = new_register(T_METADATA);
2399 __ metadata2reg(md->constant_encoding(), md_reg);
2400 LIR_Opr data_offset_reg = new_pointer_register();
2401 LIR_Opr tmp_reg = new_pointer_register();
2402
2403 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2404 for (int i = 0; i < len; i++) {
2405 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2406 __ cmp(lir_cond_equal, value, x->key_at(i));
2407 __ move(data_offset_reg, tmp_reg);
2408 __ cmove(lir_cond_equal,
2409 LIR_OprFact::intptrConst(count_offset),
2410 tmp_reg,
2411 data_offset_reg, T_INT);
2412 }
2413
2414 LIR_Opr data_reg = new_pointer_register();
2415 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2416 __ move(data_addr, data_reg);
2417 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2418 __ move(data_reg, data_addr);
2419 }
2420
2421 if (UseTableRanges) {
2422 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2423 } else {
2424 int len = x->length();
2425 for (int i = 0; i < len; i++) {
2426 __ cmp(lir_cond_equal, value, x->key_at(i));
2427 __ branch(lir_cond_equal, x->sux_at(i));
2428 }
2429 __ jump(x->default_sux());
2430 }
2431 }
2432
2433
2434 void LIRGenerator::do_Goto(Goto* x) {
2435 set_no_result(x);
2436
2437 if (block()->next()->as_OsrEntry()) {
2438 // need to free up storage used for OSR entry point
2439 LIR_Opr osrBuffer = block()->next()->operand();
2440 BasicTypeList signature;
2441 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2442 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2443 __ move(osrBuffer, cc->args()->at(0));
2444 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2445 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2446 }
2447
2448 if (x->is_safepoint()) {
2449 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2450
2451 // increment backedge counter if needed
2452 CodeEmitInfo* info = state_for(x, state);
2453 increment_backedge_counter(info, x->profiled_bci());
2454 CodeEmitInfo* safepoint_info = state_for(x, state);
2455 __ safepoint(safepoint_poll_register(), safepoint_info);
2456 }
2457
2458 // Gotos can be folded Ifs, handle this case.
2459 if (x->should_profile()) {
2460 ciMethod* method = x->profiled_method();
2461 assert(method != nullptr, "method should be set if branch is profiled");
2462 ciMethodData* md = method->method_data_or_null();
2463 assert(md != nullptr, "Sanity");
2464 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2465 assert(data != nullptr, "must have profiling data");
2466 int offset;
2467 if (x->direction() == Goto::taken) {
2468 assert(data->is_BranchData(), "need BranchData for two-way branches");
2469 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2470 } else if (x->direction() == Goto::not_taken) {
2471 assert(data->is_BranchData(), "need BranchData for two-way branches");
2472 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2473 } else {
2474 assert(data->is_JumpData(), "need JumpData for branches");
2475 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2476 }
2477 LIR_Opr md_reg = new_register(T_METADATA);
2478 __ metadata2reg(md->constant_encoding(), md_reg);
2479
2480 increment_counter(new LIR_Address(md_reg, offset,
2481 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2482 }
2483
2484 // emit phi-instruction move after safepoint since this simplifies
2485 // describing the state as the safepoint.
2486 move_to_phi(x->state());
2487
2488 __ jump(x->default_sux());
2489 }
2490
2491 /**
2492 * Emit profiling code if needed for arguments, parameters, return value types
2493 *
2494 * @param md MDO the code will update at runtime
2495 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2496 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2497 * @param profiled_k current profile
2498 * @param obj IR node for the object to be profiled
2499 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2500 * Set once we find an update to make and use for next ones.
2501 * @param not_null true if we know obj cannot be null
2502 * @param signature_at_call_k signature at call for obj
2503 * @param callee_signature_k signature of callee for obj
2504 * at call and callee signatures differ at method handle call
2505 * @return the only klass we know will ever be seen at this profile point
2506 */
2507 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2508 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2509 ciKlass* callee_signature_k) {
2510 ciKlass* result = nullptr;
2511 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2512 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2513 // known not to be null or null bit already set and already set to
2514 // unknown: nothing we can do to improve profiling
2515 if (!do_null && !do_update) {
2516 return result;
2517 }
2518
2519 ciKlass* exact_klass = nullptr;
2520 Compilation* comp = Compilation::current();
2521 if (do_update) {
2522 // try to find exact type, using CHA if possible, so that loading
2523 // the klass from the object can be avoided
2524 ciType* type = obj->exact_type();
2525 if (type == nullptr) {
2526 type = obj->declared_type();
2527 type = comp->cha_exact_type(type);
2528 }
2529 assert(type == nullptr || type->is_klass(), "type should be class");
2530 exact_klass = (type != nullptr && type->is_loaded()) ? (ciKlass*)type : nullptr;
2531
2532 do_update = exact_klass == nullptr || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2533 }
2534
2535 if (!do_null && !do_update) {
2536 return result;
2537 }
2538
2539 ciKlass* exact_signature_k = nullptr;
2540 if (do_update) {
2541 // Is the type from the signature exact (the only one possible)?
2542 exact_signature_k = signature_at_call_k->exact_klass();
2543 if (exact_signature_k == nullptr) {
2544 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2545 } else {
2546 result = exact_signature_k;
2547 // Known statically. No need to emit any code: prevent
2548 // LIR_Assembler::emit_profile_type() from emitting useless code
2549 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2550 }
2551 // exact_klass and exact_signature_k can be both non null but
2552 // different if exact_klass is loaded after the ciObject for
2553 // exact_signature_k is created.
2554 if (exact_klass == nullptr && exact_signature_k != nullptr && exact_klass != exact_signature_k) {
2555 // sometimes the type of the signature is better than the best type
2556 // the compiler has
2557 exact_klass = exact_signature_k;
2558 }
2559 if (callee_signature_k != nullptr &&
2560 callee_signature_k != signature_at_call_k) {
2561 ciKlass* improved_klass = callee_signature_k->exact_klass();
2562 if (improved_klass == nullptr) {
2563 improved_klass = comp->cha_exact_type(callee_signature_k);
2564 }
2565 if (exact_klass == nullptr && improved_klass != nullptr && exact_klass != improved_klass) {
2566 exact_klass = exact_signature_k;
2567 }
2568 }
2569 do_update = exact_klass == nullptr || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2570 }
2571
2572 if (!do_null && !do_update) {
2573 return result;
2574 }
2575
2576 if (mdp == LIR_OprFact::illegalOpr) {
2577 mdp = new_register(T_METADATA);
2578 __ metadata2reg(md->constant_encoding(), mdp);
2579 if (md_base_offset != 0) {
2580 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2581 mdp = new_pointer_register();
2582 __ leal(LIR_OprFact::address(base_type_address), mdp);
2583 }
2584 }
2585 LIRItem value(obj, this);
2586 value.load_item();
2587 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2588 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != nullptr);
2589 return result;
2590 }
2591
2592 // profile parameters on entry to the root of the compilation
2593 void LIRGenerator::profile_parameters(Base* x) {
2594 if (compilation()->profile_parameters()) {
2595 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2596 ciMethodData* md = scope()->method()->method_data_or_null();
2597 assert(md != nullptr, "Sanity");
2598
2599 if (md->parameters_type_data() != nullptr) {
2600 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2601 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2602 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2603 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2604 LIR_Opr src = args->at(i);
2605 assert(!src->is_illegal(), "check");
2606 BasicType t = src->type();
2607 if (is_reference_type(t)) {
2608 intptr_t profiled_k = parameters->type(j);
2609 Local* local = x->state()->local_at(java_index)->as_Local();
2610 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2611 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2612 profiled_k, local, mdp, false, local->declared_type()->as_klass(), nullptr);
2613 // If the profile is known statically set it once for all and do not emit any code
2614 if (exact != nullptr) {
2615 md->set_parameter_type(j, exact);
2616 }
2617 j++;
2618 }
2619 java_index += type2size[t];
2620 }
2621 }
2622 }
2623 }
2624
2625 void LIRGenerator::do_Base(Base* x) {
2626 __ std_entry(LIR_OprFact::illegalOpr);
2627 // Emit moves from physical registers / stack slots to virtual registers
2628 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2629 IRScope* irScope = compilation()->hir()->top_scope();
2630 int java_index = 0;
2631 for (int i = 0; i < args->length(); i++) {
2632 LIR_Opr src = args->at(i);
2633 assert(!src->is_illegal(), "check");
2634 BasicType t = src->type();
2635
2636 // Types which are smaller than int are passed as int, so
2637 // correct the type which passed.
2638 switch (t) {
2639 case T_BYTE:
2640 case T_BOOLEAN:
2641 case T_SHORT:
2642 case T_CHAR:
2643 t = T_INT;
2644 break;
2645 default:
2646 break;
2647 }
2648
2649 LIR_Opr dest = new_register(t);
2650 __ move(src, dest);
2651
2652 // Assign new location to Local instruction for this local
2653 Local* local = x->state()->local_at(java_index)->as_Local();
2654 assert(local != nullptr, "Locals for incoming arguments must have been created");
2655 #ifndef __SOFTFP__
2656 // The java calling convention passes double as long and float as int.
2657 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2658 #endif // __SOFTFP__
2659 local->set_operand(dest);
2660 #ifdef ASSERT
2661 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, nullptr);
2662 #endif
2663 java_index += type2size[t];
2664 }
2665
2666 if (compilation()->env()->dtrace_method_probes()) {
2667 BasicTypeList signature;
2668 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2669 signature.append(T_METADATA); // Method*
2670 LIR_OprList* args = new LIR_OprList();
2671 args->append(getThreadPointer());
2672 LIR_Opr meth = new_register(T_METADATA);
2673 __ metadata2reg(method()->constant_encoding(), meth);
2674 args->append(meth);
2675 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, nullptr);
2676 }
2677
2678 if (method()->is_synchronized()) {
2679 LIR_Opr obj;
2680 if (method()->is_static()) {
2681 obj = new_register(T_OBJECT);
2682 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2683 } else {
2684 Local* receiver = x->state()->local_at(0)->as_Local();
2685 assert(receiver != nullptr, "must already exist");
2686 obj = receiver->operand();
2687 }
2688 assert(obj->is_valid(), "must be valid");
2689
2690 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2691 LIR_Opr lock = syncLockOpr();
2692 __ load_stack_address_monitor(0, lock);
2693
2694 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), nullptr, x->check_flag(Instruction::DeoptimizeOnException));
2695 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2696
2697 // receiver is guaranteed non-null so don't need CodeEmitInfo
2698 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, nullptr);
2699 }
2700 }
2701 // increment invocation counters if needed
2702 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2703 profile_parameters(x);
2704 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), nullptr, false);
2705 increment_invocation_counter(info);
2706 }
2707
2708 // all blocks with a successor must end with an unconditional jump
2709 // to the successor even if they are consecutive
2710 __ jump(x->default_sux());
2711 }
2712
2713
2714 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2715 // construct our frame and model the production of incoming pointer
2716 // to the OSR buffer.
2717 __ osr_entry(LIR_Assembler::osrBufferPointer());
2718 LIR_Opr result = rlock_result(x);
2719 __ move(LIR_Assembler::osrBufferPointer(), result);
2720 }
2721
2722
2723 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2724 assert(args->length() == arg_list->length(),
2725 "args=%d, arg_list=%d", args->length(), arg_list->length());
2726 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2727 LIRItem* param = args->at(i);
2728 LIR_Opr loc = arg_list->at(i);
2729 if (loc->is_register()) {
2730 param->load_item_force(loc);
2731 } else {
2732 LIR_Address* addr = loc->as_address_ptr();
2733 param->load_for_store(addr->type());
2734 if (addr->type() == T_OBJECT) {
2735 __ move_wide(param->result(), addr);
2736 } else
2737 __ move(param->result(), addr);
2738 }
2739 }
2740
2741 if (x->has_receiver()) {
2742 LIRItem* receiver = args->at(0);
2743 LIR_Opr loc = arg_list->at(0);
2744 if (loc->is_register()) {
2745 receiver->load_item_force(loc);
2746 } else {
2747 assert(loc->is_address(), "just checking");
2748 receiver->load_for_store(T_OBJECT);
2749 __ move_wide(receiver->result(), loc->as_address_ptr());
2750 }
2751 }
2752 }
2753
2754
2755 // Visits all arguments, returns appropriate items without loading them
2756 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2757 LIRItemList* argument_items = new LIRItemList();
2758 if (x->has_receiver()) {
2759 LIRItem* receiver = new LIRItem(x->receiver(), this);
2760 argument_items->append(receiver);
2761 }
2762 for (int i = 0; i < x->number_of_arguments(); i++) {
2763 LIRItem* param = new LIRItem(x->argument_at(i), this);
2764 argument_items->append(param);
2765 }
2766 return argument_items;
2767 }
2768
2769
2770 // The invoke with receiver has following phases:
2771 // a) traverse and load/lock receiver;
2772 // b) traverse all arguments -> item-array (invoke_visit_argument)
2773 // c) push receiver on stack
2774 // d) load each of the items and push on stack
2775 // e) unlock receiver
2776 // f) move receiver into receiver-register %o0
2777 // g) lock result registers and emit call operation
2778 //
2779 // Before issuing a call, we must spill-save all values on stack
2780 // that are in caller-save register. "spill-save" moves those registers
2781 // either in a free callee-save register or spills them if no free
2782 // callee save register is available.
2783 //
2784 // The problem is where to invoke spill-save.
2785 // - if invoked between e) and f), we may lock callee save
2786 // register in "spill-save" that destroys the receiver register
2787 // before f) is executed
2788 // - if we rearrange f) to be earlier (by loading %o0) it
2789 // may destroy a value on the stack that is currently in %o0
2790 // and is waiting to be spilled
2791 // - if we keep the receiver locked while doing spill-save,
2792 // we cannot spill it as it is spill-locked
2793 //
2794 void LIRGenerator::do_Invoke(Invoke* x) {
2795 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2796
2797 LIR_OprList* arg_list = cc->args();
2798 LIRItemList* args = invoke_visit_arguments(x);
2799 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2800
2801 // setup result register
2802 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2803 if (x->type() != voidType) {
2804 result_register = result_register_for(x->type());
2805 }
2806
2807 CodeEmitInfo* info = state_for(x, x->state());
2808
2809 invoke_load_arguments(x, args, arg_list);
2810
2811 if (x->has_receiver()) {
2812 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2813 receiver = args->at(0)->result();
2814 }
2815
2816 // emit invoke code
2817 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2818
2819 // JSR 292
2820 // Preserve the SP over MethodHandle call sites, if needed.
2821 ciMethod* target = x->target();
2822 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
2823 target->is_method_handle_intrinsic() ||
2824 target->is_compiled_lambda_form());
2825 if (is_method_handle_invoke) {
2826 info->set_is_method_handle_invoke(true);
2827 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2828 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
2829 }
2830 }
2831
2832 switch (x->code()) {
2833 case Bytecodes::_invokestatic:
2834 __ call_static(target, result_register,
2835 SharedRuntime::get_resolve_static_call_stub(),
2836 arg_list, info);
2837 break;
2838 case Bytecodes::_invokespecial:
2839 case Bytecodes::_invokevirtual:
2840 case Bytecodes::_invokeinterface:
2841 // for loaded and final (method or class) target we still produce an inline cache,
2842 // in order to be able to call mixed mode
2843 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) {
2844 __ call_opt_virtual(target, receiver, result_register,
2845 SharedRuntime::get_resolve_opt_virtual_call_stub(),
2846 arg_list, info);
2847 } else {
2848 __ call_icvirtual(target, receiver, result_register,
2849 SharedRuntime::get_resolve_virtual_call_stub(),
2850 arg_list, info);
2851 }
2852 break;
2853 case Bytecodes::_invokedynamic: {
2854 __ call_dynamic(target, receiver, result_register,
2855 SharedRuntime::get_resolve_static_call_stub(),
2856 arg_list, info);
2857 break;
2858 }
2859 default:
2860 fatal("unexpected bytecode: %s", Bytecodes::name(x->code()));
2861 break;
2862 }
2863
2864 // JSR 292
2865 // Restore the SP after MethodHandle call sites, if needed.
2866 if (is_method_handle_invoke
2867 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2868 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
2869 }
2870
2871 if (result_register->is_valid()) {
2872 LIR_Opr result = rlock_result(x);
2873 __ move(result_register, result);
2874 }
2875 }
2876
2877
2878 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
2879 assert(x->number_of_arguments() == 1, "wrong type");
2880 LIRItem value (x->argument_at(0), this);
2881 LIR_Opr reg = rlock_result(x);
2882 value.load_item();
2883 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
2884 __ move(tmp, reg);
2885 }
2886
2887
2888
2889 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
2890 void LIRGenerator::do_IfOp(IfOp* x) {
2891 #ifdef ASSERT
2892 {
2893 ValueTag xtag = x->x()->type()->tag();
2894 ValueTag ttag = x->tval()->type()->tag();
2895 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
2896 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
2897 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
2898 }
2899 #endif
2900
2901 LIRItem left(x->x(), this);
2902 LIRItem right(x->y(), this);
2903 left.load_item();
2904 if (can_inline_as_constant(right.value())) {
2905 right.dont_load_item();
2906 } else {
2907 right.load_item();
2908 }
2909
2910 LIRItem t_val(x->tval(), this);
2911 LIRItem f_val(x->fval(), this);
2912 t_val.dont_load_item();
2913 f_val.dont_load_item();
2914 LIR_Opr reg = rlock_result(x);
2915
2916 __ cmp(lir_cond(x->cond()), left.result(), right.result());
2917 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
2918 }
2919
2920 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
2921 assert(x->number_of_arguments() == 0, "wrong type");
2922 // Enforce computation of _reserved_argument_area_size which is required on some platforms.
2923 BasicTypeList signature;
2924 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2925 LIR_Opr reg = result_register_for(x->type());
2926 __ call_runtime_leaf(routine, getThreadTemp(),
2927 reg, new LIR_OprList());
2928 LIR_Opr result = rlock_result(x);
2929 __ move(reg, result);
2930 }
2931
2932
2933
2934 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
2935 switch (x->id()) {
2936 case vmIntrinsics::_intBitsToFloat :
2937 case vmIntrinsics::_doubleToRawLongBits :
2938 case vmIntrinsics::_longBitsToDouble :
2939 case vmIntrinsics::_floatToRawIntBits : {
2940 do_FPIntrinsics(x);
2941 break;
2942 }
2943
2944 #ifdef JFR_HAVE_INTRINSICS
2945 case vmIntrinsics::_counterTime:
2946 do_RuntimeCall(CAST_FROM_FN_PTR(address, JfrTime::time_function()), x);
2947 break;
2948 #endif
2949
2950 case vmIntrinsics::_currentTimeMillis:
2951 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x);
2952 break;
2953
2954 case vmIntrinsics::_nanoTime:
2955 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x);
2956 break;
2957
2958 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
2959 case vmIntrinsics::_isInstance: do_isInstance(x); break;
2960 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break;
2961 case vmIntrinsics::_getModifiers: do_getModifiers(x); break;
2962 case vmIntrinsics::_getClass: do_getClass(x); break;
2963 case vmIntrinsics::_getObjectSize: do_getObjectSize(x); break;
2964 case vmIntrinsics::_currentCarrierThread: do_currentCarrierThread(x); break;
2965 case vmIntrinsics::_currentThread: do_vthread(x); break;
2966 case vmIntrinsics::_scopedValueCache: do_scopedValueCache(x); break;
2967
2968 case vmIntrinsics::_dlog: // fall through
2969 case vmIntrinsics::_dlog10: // fall through
2970 case vmIntrinsics::_dabs: // fall through
2971 case vmIntrinsics::_dsqrt: // fall through
2972 case vmIntrinsics::_dsqrt_strict: // fall through
2973 case vmIntrinsics::_dtan: // fall through
2974 case vmIntrinsics::_dtanh: // 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 counter_holder = new_pointer_register();
3284 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3285 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3286 MethodCounters::invocation_counter_offset());
3287 } else if (level == CompLevel_full_profile) {
3288 counter_holder = new_register(T_METADATA);
3289 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3290 MethodData::invocation_counter_offset());
3291 ciMethodData* md = method->method_data_or_null();
3292 assert(md != nullptr, "Sanity");
3293 __ metadata2reg(md->constant_encoding(), counter_holder);
3294 } else {
3295 ShouldNotReachHere();
3296 }
3297 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3298 LIR_Opr result = new_register(T_INT);
3299 __ load(counter, result);
3300 __ add(result, step, result);
3301 __ store(result, counter);
3302 if (notify && (!backedge || UseOnStackReplacement)) {
3303 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding());
3304 // The bci for info can point to cmp for if's we want the if bci
3305 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3306 int freq = frequency << InvocationCounter::count_shift;
3307 if (freq == 0) {
3308 if (!step->is_constant()) {
3309 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3310 __ branch(lir_cond_notEqual, overflow);
3311 } else {
3312 __ branch(lir_cond_always, overflow);
3313 }
3314 } else {
3315 LIR_Opr mask = load_immediate(freq, T_INT);
3316 if (!step->is_constant()) {
3317 // If step is 0, make sure the overflow check below always fails
3318 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3319 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT);
3320 }
3321 __ logical_and(result, mask, result);
3322 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3323 __ branch(lir_cond_equal, overflow);
3324 }
3325 __ branch_destination(overflow->continuation());
3326 }
3327 }
3328
3329 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3330 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3331 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3332
3333 if (x->pass_thread()) {
3334 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3335 args->append(getThreadPointer());
3336 }
3337
3338 for (int i = 0; i < x->number_of_arguments(); i++) {
3339 Value a = x->argument_at(i);
3340 LIRItem* item = new LIRItem(a, this);
3341 item->load_item();
3342 args->append(item->result());
3343 signature->append(as_BasicType(a->type()));
3344 }
3345
3346 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), nullptr);
3347 if (x->type() == voidType) {
3348 set_no_result(x);
3349 } else {
3350 __ move(result, rlock_result(x));
3351 }
3352 }
3353
3354 #ifdef ASSERT
3355 void LIRGenerator::do_Assert(Assert *x) {
3356 ValueTag tag = x->x()->type()->tag();
3357 If::Condition cond = x->cond();
3358
3359 LIRItem xitem(x->x(), this);
3360 LIRItem yitem(x->y(), this);
3361 LIRItem* xin = &xitem;
3362 LIRItem* yin = &yitem;
3363
3364 assert(tag == intTag, "Only integer assertions are valid!");
3365
3366 xin->load_item();
3367 yin->dont_load_item();
3368
3369 set_no_result(x);
3370
3371 LIR_Opr left = xin->result();
3372 LIR_Opr right = yin->result();
3373
3374 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3375 }
3376 #endif
3377
3378 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3379
3380
3381 Instruction *a = x->x();
3382 Instruction *b = x->y();
3383 if (!a || StressRangeCheckElimination) {
3384 assert(!b || StressRangeCheckElimination, "B must also be null");
3385
3386 CodeEmitInfo *info = state_for(x, x->state());
3387 CodeStub* stub = new PredicateFailedStub(info);
3388
3389 __ jump(stub);
3390 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3391 int a_int = a->type()->as_IntConstant()->value();
3392 int b_int = b->type()->as_IntConstant()->value();
3393
3394 bool ok = false;
3395
3396 switch(x->cond()) {
3397 case Instruction::eql: ok = (a_int == b_int); break;
3398 case Instruction::neq: ok = (a_int != b_int); break;
3399 case Instruction::lss: ok = (a_int < b_int); break;
3400 case Instruction::leq: ok = (a_int <= b_int); break;
3401 case Instruction::gtr: ok = (a_int > b_int); break;
3402 case Instruction::geq: ok = (a_int >= b_int); break;
3403 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3404 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3405 default: ShouldNotReachHere();
3406 }
3407
3408 if (ok) {
3409
3410 CodeEmitInfo *info = state_for(x, x->state());
3411 CodeStub* stub = new PredicateFailedStub(info);
3412
3413 __ jump(stub);
3414 }
3415 } else {
3416
3417 ValueTag tag = x->x()->type()->tag();
3418 If::Condition cond = x->cond();
3419 LIRItem xitem(x->x(), this);
3420 LIRItem yitem(x->y(), this);
3421 LIRItem* xin = &xitem;
3422 LIRItem* yin = &yitem;
3423
3424 assert(tag == intTag, "Only integer deoptimizations are valid!");
3425
3426 xin->load_item();
3427 yin->dont_load_item();
3428 set_no_result(x);
3429
3430 LIR_Opr left = xin->result();
3431 LIR_Opr right = yin->result();
3432
3433 CodeEmitInfo *info = state_for(x, x->state());
3434 CodeStub* stub = new PredicateFailedStub(info);
3435
3436 __ cmp(lir_cond(cond), left, right);
3437 __ branch(lir_cond(cond), stub);
3438 }
3439 }
3440
3441 void LIRGenerator::do_blackhole(Intrinsic *x) {
3442 assert(!x->has_receiver(), "Should have been checked before: only static methods here");
3443 for (int c = 0; c < x->number_of_arguments(); c++) {
3444 // Load the argument
3445 LIRItem vitem(x->argument_at(c), this);
3446 vitem.load_item();
3447 // ...and leave it unused.
3448 }
3449 }
3450
3451 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3452 LIRItemList args(1);
3453 LIRItem value(arg1, this);
3454 args.append(&value);
3455 BasicTypeList signature;
3456 signature.append(as_BasicType(arg1->type()));
3457
3458 return call_runtime(&signature, &args, entry, result_type, info);
3459 }
3460
3461
3462 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3463 LIRItemList args(2);
3464 LIRItem value1(arg1, this);
3465 LIRItem value2(arg2, this);
3466 args.append(&value1);
3467 args.append(&value2);
3468 BasicTypeList signature;
3469 signature.append(as_BasicType(arg1->type()));
3470 signature.append(as_BasicType(arg2->type()));
3471
3472 return call_runtime(&signature, &args, entry, result_type, info);
3473 }
3474
3475
3476 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3477 address entry, ValueType* result_type, CodeEmitInfo* info) {
3478 // get a result register
3479 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3480 LIR_Opr result = LIR_OprFact::illegalOpr;
3481 if (result_type->tag() != voidTag) {
3482 result = new_register(result_type);
3483 phys_reg = result_register_for(result_type);
3484 }
3485
3486 // move the arguments into the correct location
3487 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3488 assert(cc->length() == args->length(), "argument mismatch");
3489 for (int i = 0; i < args->length(); i++) {
3490 LIR_Opr arg = args->at(i);
3491 LIR_Opr loc = cc->at(i);
3492 if (loc->is_register()) {
3493 __ move(arg, loc);
3494 } else {
3495 LIR_Address* addr = loc->as_address_ptr();
3496 // if (!can_store_as_constant(arg)) {
3497 // LIR_Opr tmp = new_register(arg->type());
3498 // __ move(arg, tmp);
3499 // arg = tmp;
3500 // }
3501 __ move(arg, addr);
3502 }
3503 }
3504
3505 if (info) {
3506 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3507 } else {
3508 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3509 }
3510 if (result->is_valid()) {
3511 __ move(phys_reg, result);
3512 }
3513 return result;
3514 }
3515
3516
3517 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3518 address entry, ValueType* result_type, CodeEmitInfo* info) {
3519 // get a result register
3520 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3521 LIR_Opr result = LIR_OprFact::illegalOpr;
3522 if (result_type->tag() != voidTag) {
3523 result = new_register(result_type);
3524 phys_reg = result_register_for(result_type);
3525 }
3526
3527 // move the arguments into the correct location
3528 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3529
3530 assert(cc->length() == args->length(), "argument mismatch");
3531 for (int i = 0; i < args->length(); i++) {
3532 LIRItem* arg = args->at(i);
3533 LIR_Opr loc = cc->at(i);
3534 if (loc->is_register()) {
3535 arg->load_item_force(loc);
3536 } else {
3537 LIR_Address* addr = loc->as_address_ptr();
3538 arg->load_for_store(addr->type());
3539 __ move(arg->result(), addr);
3540 }
3541 }
3542
3543 if (info) {
3544 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3545 } else {
3546 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3547 }
3548 if (result->is_valid()) {
3549 __ move(phys_reg, result);
3550 }
3551 return result;
3552 }
3553
3554 void LIRGenerator::do_MemBar(MemBar* x) {
3555 LIR_Code code = x->code();
3556 switch(code) {
3557 case lir_membar_acquire : __ membar_acquire(); break;
3558 case lir_membar_release : __ membar_release(); break;
3559 case lir_membar : __ membar(); break;
3560 case lir_membar_loadload : __ membar_loadload(); break;
3561 case lir_membar_storestore: __ membar_storestore(); break;
3562 case lir_membar_loadstore : __ membar_loadstore(); break;
3563 case lir_membar_storeload : __ membar_storeload(); break;
3564 default : ShouldNotReachHere(); break;
3565 }
3566 }
3567
3568 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3569 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3570 if (two_operand_lir_form) {
3571 __ move(value, value_fixed);
3572 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3573 } else {
3574 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3575 }
3576 LIR_Opr klass = new_register(T_METADATA);
3577 load_klass(array, klass, null_check_info);
3578 null_check_info = nullptr;
3579 LIR_Opr layout = new_register(T_INT);
3580 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3581 int diffbit = Klass::layout_helper_boolean_diffbit();
3582 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3583 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3584 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3585 value = value_fixed;
3586 return value;
3587 }