1 /*
2 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Defs.hpp"
27 #include "c1/c1_Compilation.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 "gc_implementation/shenandoah/shenandoahBarrierSetC1.hpp"
37 #include "gc_implementation/shenandoah/shenandoahHeap.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #include "utilities/bitMap.inline.hpp"
41 #include "utilities/macros.hpp"
42 #if INCLUDE_ALL_GCS
43 #include "gc_implementation/g1/heapRegion.hpp"
44 #endif // INCLUDE_ALL_GCS
45
46 #ifdef ASSERT
47 #define __ gen()->lir(__FILE__, __LINE__)->
48 #else
49 #define __ gen()->lir()->
50 #endif
51
52 #ifndef PATCHED_ADDR
53 #define PATCHED_ADDR (max_jint)
54 #endif
55
56 void PhiResolverState::reset(int max_vregs) {
57 // Initialize array sizes
58 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL);
59 _virtual_operands.trunc_to(0);
60 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL);
61 _other_operands.trunc_to(0);
62 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL);
63 _vreg_table.trunc_to(0);
64 }
65
66
67
68 //--------------------------------------------------------------
69 // PhiResolver
70
71 // Resolves cycles:
72 //
73 // r1 := r2 becomes temp := r1
74 // r2 := r1 r1 := r2
75 // r2 := temp
76 // and orders moves:
77 //
78 // r2 := r3 becomes r1 := r2
79 // r1 := r2 r2 := r3
80
81 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs)
82 : _gen(gen)
83 , _state(gen->resolver_state())
84 , _temp(LIR_OprFact::illegalOpr)
85 {
86 // reinitialize the shared state arrays
87 _state.reset(max_vregs);
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 == NULL, "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 != NULL) {
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()[i];
150 if (!node->visited()) {
151 _loop = NULL;
152 move(NULL, 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()[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, NULL);
173 assert(node == NULL || node->operand() == opr, "");
174 if (node == NULL) {
175 node = new ResolveNode(opr);
176 vreg_table()[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 if (opr->is_virtual()) {
210 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL);
211 }
212
213 _result = opr;
214 }
215
216 void LIRItem::load_item() {
217 if (result()->is_illegal()) {
218 // update the items result
219 _result = value()->operand();
220 }
221 if (!result()->is_register()) {
222 LIR_Opr reg = _gen->new_register(value()->type());
223 __ move(result(), reg);
224 if (result()->is_constant()) {
225 _result = reg;
226 } else {
227 set_result(reg);
228 }
229 }
230 }
231
232
233 void LIRItem::load_for_store(BasicType type) {
234 if (_gen->can_store_as_constant(value(), type)) {
235 _result = value()->operand();
236 if (!_result->is_constant()) {
237 _result = LIR_OprFact::value_type(value()->type());
238 }
239 } else if (type == T_BYTE || type == T_BOOLEAN) {
240 load_byte_item();
241 } else {
242 load_item();
243 }
244 }
245
246 void LIRItem::load_item_force(LIR_Opr reg) {
247 LIR_Opr r = result();
248 if (r != reg) {
249 #if !defined(ARM) && !defined(E500V2)
250 if (r->type() != reg->type()) {
251 // moves between different types need an intervening spill slot
252 r = _gen->force_to_spill(r, reg->type());
253 }
254 #endif
255 __ move(r, reg);
256 _result = reg;
257 }
258 }
259
260 ciObject* LIRItem::get_jobject_constant() const {
261 ObjectType* oc = type()->as_ObjectType();
262 if (oc) {
263 return oc->constant_value();
264 }
265 return NULL;
266 }
267
268
269 jint LIRItem::get_jint_constant() const {
270 assert(is_constant() && value() != NULL, "");
271 assert(type()->as_IntConstant() != NULL, "type check");
272 return type()->as_IntConstant()->value();
273 }
274
275
276 jint LIRItem::get_address_constant() const {
277 assert(is_constant() && value() != NULL, "");
278 assert(type()->as_AddressConstant() != NULL, "type check");
279 return type()->as_AddressConstant()->value();
280 }
281
282
283 jfloat LIRItem::get_jfloat_constant() const {
284 assert(is_constant() && value() != NULL, "");
285 assert(type()->as_FloatConstant() != NULL, "type check");
286 return type()->as_FloatConstant()->value();
287 }
288
289
290 jdouble LIRItem::get_jdouble_constant() const {
291 assert(is_constant() && value() != NULL, "");
292 assert(type()->as_DoubleConstant() != NULL, "type check");
293 return type()->as_DoubleConstant()->value();
294 }
295
296
297 jlong LIRItem::get_jlong_constant() const {
298 assert(is_constant() && value() != NULL, "");
299 assert(type()->as_LongConstant() != NULL, "type check");
300 return type()->as_LongConstant()->value();
301 }
302
303
304
305 //--------------------------------------------------------------
306
307
308 void LIRGenerator::init() {
309 _bs = Universe::heap()->barrier_set();
310 }
311
312
313 void LIRGenerator::block_do_prolog(BlockBegin* block) {
314 #ifndef PRODUCT
315 if (PrintIRWithLIR) {
316 block->print();
317 }
318 #endif
319
320 // set up the list of LIR instructions
321 assert(block->lir() == NULL, "LIR list already computed for this block");
322 _lir = new LIR_List(compilation(), block);
323 block->set_lir(_lir);
324
325 __ branch_destination(block->label());
326
327 if (LIRTraceExecution &&
328 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
329 !block->is_set(BlockBegin::exception_entry_flag)) {
330 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
331 trace_block_entry(block);
332 }
333 }
334
335
336 void LIRGenerator::block_do_epilog(BlockBegin* block) {
337 #ifndef PRODUCT
338 if (PrintIRWithLIR) {
339 tty->cr();
340 }
341 #endif
342
343 // LIR_Opr for unpinned constants shouldn't be referenced by other
344 // blocks so clear them out after processing the block.
345 for (int i = 0; i < _unpinned_constants.length(); i++) {
346 _unpinned_constants.at(i)->clear_operand();
347 }
348 _unpinned_constants.trunc_to(0);
349
350 // clear our any registers for other local constants
351 _constants.trunc_to(0);
352 _reg_for_constants.trunc_to(0);
353 }
354
355
356 void LIRGenerator::block_do(BlockBegin* block) {
357 CHECK_BAILOUT();
358
359 block_do_prolog(block);
360 set_block(block);
361
362 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
363 if (instr->is_pinned()) do_root(instr);
364 }
365
366 set_block(NULL);
367 block_do_epilog(block);
368 }
369
370
371 //-------------------------LIRGenerator-----------------------------
372
373 // This is where the tree-walk starts; instr must be root;
374 void LIRGenerator::do_root(Value instr) {
375 CHECK_BAILOUT();
376
377 InstructionMark im(compilation(), instr);
378
379 assert(instr->is_pinned(), "use only with roots");
380 assert(instr->subst() == instr, "shouldn't have missed substitution");
381
382 instr->visit(this);
383
384 assert(!instr->has_uses() || instr->operand()->is_valid() ||
385 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
386 }
387
388
389 // This is called for each node in tree; the walk stops if a root is reached
390 void LIRGenerator::walk(Value instr) {
391 InstructionMark im(compilation(), instr);
392 //stop walk when encounter a root
393 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) {
394 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
395 } else {
396 assert(instr->subst() == instr, "shouldn't have missed substitution");
397 instr->visit(this);
398 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
399 }
400 }
401
402
403 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
404 assert(state != NULL, "state must be defined");
405
406 #ifndef PRODUCT
407 state->verify();
408 #endif
409
410 ValueStack* s = state;
411 for_each_state(s) {
412 if (s->kind() == ValueStack::EmptyExceptionState) {
413 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty");
414 continue;
415 }
416
417 int index;
418 Value value;
419 for_each_stack_value(s, index, value) {
420 assert(value->subst() == value, "missed substitution");
421 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
422 walk(value);
423 assert(value->operand()->is_valid(), "must be evaluated now");
424 }
425 }
426
427 int bci = s->bci();
428 IRScope* scope = s->scope();
429 ciMethod* method = scope->method();
430
431 MethodLivenessResult liveness = method->liveness_at_bci(bci);
432 if (bci == SynchronizationEntryBCI) {
433 if (x->as_ExceptionObject() || x->as_Throw()) {
434 // all locals are dead on exit from the synthetic unlocker
435 liveness.clear();
436 } else {
437 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
438 }
439 }
440 if (!liveness.is_valid()) {
441 // Degenerate or breakpointed method.
442 bailout("Degenerate or breakpointed method");
443 } else {
444 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
445 for_each_local_value(s, index, value) {
446 assert(value->subst() == value, "missed substition");
447 if (liveness.at(index) && !value->type()->is_illegal()) {
448 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
449 walk(value);
450 assert(value->operand()->is_valid(), "must be evaluated now");
451 }
452 } else {
453 // NULL out this local so that linear scan can assume that all non-NULL values are live.
454 s->invalidate_local(index);
455 }
456 }
457 }
458 }
459
460 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
461 }
462
463
464 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
465 return state_for(x, x->exception_state());
466 }
467
468
469 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
470 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation
471 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
472 * the class. */
473 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) {
474 assert(info != NULL, "info must be set if class is not loaded");
475 __ klass2reg_patch(NULL, r, info);
476 } else {
477 // no patching needed
478 __ metadata2reg(obj->constant_encoding(), r);
479 }
480 }
481
482
483 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
484 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
485 CodeStub* stub = new RangeCheckStub(range_check_info, index);
486 if (index->is_constant()) {
487 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
488 index->as_jint(), null_check_info);
489 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
490 } else {
491 cmp_reg_mem(lir_cond_aboveEqual, index, array,
492 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
493 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
494 }
495 }
496
497
498 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
499 CodeStub* stub = new RangeCheckStub(info, index, true);
500 if (index->is_constant()) {
501 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
502 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
503 } else {
504 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
505 java_nio_Buffer::limit_offset(), T_INT, info);
506 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
507 }
508 __ move(index, result);
509 }
510
511
512
513 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) {
514 LIR_Opr result_op = result;
515 LIR_Opr left_op = left;
516 LIR_Opr right_op = right;
517
518 if (TwoOperandLIRForm && left_op != result_op) {
519 assert(right_op != result_op, "malformed");
520 __ move(left_op, result_op);
521 left_op = result_op;
522 }
523
524 switch(code) {
525 case Bytecodes::_dadd:
526 case Bytecodes::_fadd:
527 case Bytecodes::_ladd:
528 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
529 case Bytecodes::_fmul:
530 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
531
532 case Bytecodes::_dmul:
533 {
534 if (is_strictfp) {
535 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break;
536 } else {
537 __ mul(left_op, right_op, result_op); break;
538 }
539 }
540 break;
541
542 case Bytecodes::_imul:
543 {
544 bool did_strength_reduce = false;
545
546 if (right->is_constant()) {
547 int c = right->as_jint();
548 if (is_power_of_2(c)) {
549 // do not need tmp here
550 __ shift_left(left_op, exact_log2(c), result_op);
551 did_strength_reduce = true;
552 } else {
553 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
554 }
555 }
556 // we couldn't strength reduce so just emit the multiply
557 if (!did_strength_reduce) {
558 __ mul(left_op, right_op, result_op);
559 }
560 }
561 break;
562
563 case Bytecodes::_dsub:
564 case Bytecodes::_fsub:
565 case Bytecodes::_lsub:
566 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
567
568 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
569 // ldiv and lrem are implemented with a direct runtime call
570
571 case Bytecodes::_ddiv:
572 {
573 if (is_strictfp) {
574 __ div_strictfp (left_op, right_op, result_op, tmp_op); break;
575 } else {
576 __ div (left_op, right_op, result_op); break;
577 }
578 }
579 break;
580
581 case Bytecodes::_drem:
582 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
583
584 default: ShouldNotReachHere();
585 }
586 }
587
588
589 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
590 arithmetic_op(code, result, left, right, false, tmp);
591 }
592
593
594 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
595 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info);
596 }
597
598
599 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) {
600 arithmetic_op(code, result, left, right, is_strictfp, tmp);
601 }
602
603
604 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
605 if (TwoOperandLIRForm && value != result_op) {
606 assert(count != result_op, "malformed");
607 __ move(value, result_op);
608 value = result_op;
609 }
610
611 assert(count->is_constant() || count->is_register(), "must be");
612 switch(code) {
613 case Bytecodes::_ishl:
614 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
615 case Bytecodes::_ishr:
616 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
617 case Bytecodes::_iushr:
618 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
619 default: ShouldNotReachHere();
620 }
621 }
622
623
624 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
625 if (TwoOperandLIRForm && left_op != result_op) {
626 assert(right_op != result_op, "malformed");
627 __ move(left_op, result_op);
628 left_op = result_op;
629 }
630
631 switch(code) {
632 case Bytecodes::_iand:
633 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
634
635 case Bytecodes::_ior:
636 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
637
638 case Bytecodes::_ixor:
639 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
640
641 default: ShouldNotReachHere();
642 }
643 }
644
645
646 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) {
647 if (!GenerateSynchronizationCode) return;
648 // for slow path, use debug info for state after successful locking
649 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
650 __ load_stack_address_monitor(monitor_no, lock);
651 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
652 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
653 }
654
655
656 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
657 if (!GenerateSynchronizationCode) return;
658 // setup registers
659 LIR_Opr hdr = lock;
660 lock = new_hdr;
661 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no);
662 __ load_stack_address_monitor(monitor_no, lock);
663 __ unlock_object(hdr, object, lock, scratch, slow_path);
664 }
665
666 #ifndef PRODUCT
667 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
668 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
669 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
670 } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) {
671 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
672 }
673 }
674 #endif
675
676 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) {
677 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
678 // If klass is not loaded we do not know if the klass has finalizers:
679 if (UseFastNewInstance && klass->is_loaded()
680 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
681
682 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
683
684 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
685
686 assert(klass->is_loaded(), "must be loaded");
687 // allocate space for instance
688 assert(klass->size_helper() >= 0, "illegal instance size");
689 const int instance_size = align_object_size(klass->size_helper());
690 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
691 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
692 } else {
693 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
694 __ branch(lir_cond_always, T_ILLEGAL, slow_path);
695 __ branch_destination(slow_path->continuation());
696 }
697 }
698
699
700 static bool is_constant_zero(Instruction* inst) {
701 IntConstant* c = inst->type()->as_IntConstant();
702 if (c) {
703 return (c->value() == 0);
704 }
705 return false;
706 }
707
708
709 static bool positive_constant(Instruction* inst) {
710 IntConstant* c = inst->type()->as_IntConstant();
711 if (c) {
712 return (c->value() >= 0);
713 }
714 return false;
715 }
716
717
718 static ciArrayKlass* as_array_klass(ciType* type) {
719 if (type != NULL && type->is_array_klass() && type->is_loaded()) {
720 return (ciArrayKlass*)type;
721 } else {
722 return NULL;
723 }
724 }
725
726 static ciType* phi_declared_type(Phi* phi) {
727 ciType* t = phi->operand_at(0)->declared_type();
728 if (t == NULL) {
729 return NULL;
730 }
731 for(int i = 1; i < phi->operand_count(); i++) {
732 if (t != phi->operand_at(i)->declared_type()) {
733 return NULL;
734 }
735 }
736 return t;
737 }
738
739 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
740 Instruction* src = x->argument_at(0);
741 Instruction* src_pos = x->argument_at(1);
742 Instruction* dst = x->argument_at(2);
743 Instruction* dst_pos = x->argument_at(3);
744 Instruction* length = x->argument_at(4);
745
746 // first try to identify the likely type of the arrays involved
747 ciArrayKlass* expected_type = NULL;
748 bool is_exact = false, src_objarray = false, dst_objarray = false;
749 {
750 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
751 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
752 Phi* phi;
753 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) {
754 src_declared_type = as_array_klass(phi_declared_type(phi));
755 }
756 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
757 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
758 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) {
759 dst_declared_type = as_array_klass(phi_declared_type(phi));
760 }
761
762 if (src_exact_type != NULL && src_exact_type == dst_exact_type) {
763 // the types exactly match so the type is fully known
764 is_exact = true;
765 expected_type = src_exact_type;
766 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) {
767 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
768 ciArrayKlass* src_type = NULL;
769 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) {
770 src_type = (ciArrayKlass*) src_exact_type;
771 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) {
772 src_type = (ciArrayKlass*) src_declared_type;
773 }
774 if (src_type != NULL) {
775 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
776 is_exact = true;
777 expected_type = dst_type;
778 }
779 }
780 }
781 // at least pass along a good guess
782 if (expected_type == NULL) expected_type = dst_exact_type;
783 if (expected_type == NULL) expected_type = src_declared_type;
784 if (expected_type == NULL) expected_type = dst_declared_type;
785
786 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
787 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
788 }
789
790 // if a probable array type has been identified, figure out if any
791 // of the required checks for a fast case can be elided.
792 int flags = LIR_OpArrayCopy::all_flags;
793
794 if (!src_objarray)
795 flags &= ~LIR_OpArrayCopy::src_objarray;
796 if (!dst_objarray)
797 flags &= ~LIR_OpArrayCopy::dst_objarray;
798
799 if (!x->arg_needs_null_check(0))
800 flags &= ~LIR_OpArrayCopy::src_null_check;
801 if (!x->arg_needs_null_check(2))
802 flags &= ~LIR_OpArrayCopy::dst_null_check;
803
804
805 if (expected_type != NULL) {
806 Value length_limit = NULL;
807
808 IfOp* ifop = length->as_IfOp();
809 if (ifop != NULL) {
810 // look for expressions like min(v, a.length) which ends up as
811 // x > y ? y : x or x >= y ? y : x
812 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
813 ifop->x() == ifop->fval() &&
814 ifop->y() == ifop->tval()) {
815 length_limit = ifop->y();
816 }
817 }
818
819 // try to skip null checks and range checks
820 NewArray* src_array = src->as_NewArray();
821 if (src_array != NULL) {
822 flags &= ~LIR_OpArrayCopy::src_null_check;
823 if (length_limit != NULL &&
824 src_array->length() == length_limit &&
825 is_constant_zero(src_pos)) {
826 flags &= ~LIR_OpArrayCopy::src_range_check;
827 }
828 }
829
830 NewArray* dst_array = dst->as_NewArray();
831 if (dst_array != NULL) {
832 flags &= ~LIR_OpArrayCopy::dst_null_check;
833 if (length_limit != NULL &&
834 dst_array->length() == length_limit &&
835 is_constant_zero(dst_pos)) {
836 flags &= ~LIR_OpArrayCopy::dst_range_check;
837 }
838 }
839
840 // check from incoming constant values
841 if (positive_constant(src_pos))
842 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
843 if (positive_constant(dst_pos))
844 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
845 if (positive_constant(length))
846 flags &= ~LIR_OpArrayCopy::length_positive_check;
847
848 // see if the range check can be elided, which might also imply
849 // that src or dst is non-null.
850 ArrayLength* al = length->as_ArrayLength();
851 if (al != NULL) {
852 if (al->array() == src) {
853 // it's the length of the source array
854 flags &= ~LIR_OpArrayCopy::length_positive_check;
855 flags &= ~LIR_OpArrayCopy::src_null_check;
856 if (is_constant_zero(src_pos))
857 flags &= ~LIR_OpArrayCopy::src_range_check;
858 }
859 if (al->array() == dst) {
860 // it's the length of the destination array
861 flags &= ~LIR_OpArrayCopy::length_positive_check;
862 flags &= ~LIR_OpArrayCopy::dst_null_check;
863 if (is_constant_zero(dst_pos))
864 flags &= ~LIR_OpArrayCopy::dst_range_check;
865 }
866 }
867 if (is_exact) {
868 flags &= ~LIR_OpArrayCopy::type_check;
869 }
870 }
871
872 IntConstant* src_int = src_pos->type()->as_IntConstant();
873 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
874 if (src_int && dst_int) {
875 int s_offs = src_int->value();
876 int d_offs = dst_int->value();
877 if (src_int->value() >= dst_int->value()) {
878 flags &= ~LIR_OpArrayCopy::overlapping;
879 }
880 if (expected_type != NULL) {
881 BasicType t = expected_type->element_type()->basic_type();
882 int element_size = type2aelembytes(t);
883 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) &&
884 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) {
885 flags &= ~LIR_OpArrayCopy::unaligned;
886 }
887 }
888 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
889 // src and dest positions are the same, or dst is zero so assume
890 // nonoverlapping copy.
891 flags &= ~LIR_OpArrayCopy::overlapping;
892 }
893
894 if (src == dst) {
895 // moving within a single array so no type checks are needed
896 if (flags & LIR_OpArrayCopy::type_check) {
897 flags &= ~LIR_OpArrayCopy::type_check;
898 }
899 }
900 *flagsp = flags;
901 *expected_typep = (ciArrayKlass*)expected_type;
902 }
903
904
905 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
906 assert(opr->is_register(), "why spill if item is not register?");
907
908 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) {
909 LIR_Opr result = new_register(T_FLOAT);
910 set_vreg_flag(result, must_start_in_memory);
911 assert(opr->is_register(), "only a register can be spilled");
912 assert(opr->value_type()->is_float(), "rounding only for floats available");
913 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
914 return result;
915 }
916 return opr;
917 }
918
919
920 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
921 assert(type2size[t] == type2size[value->type()],
922 err_msg_res("size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type())));
923 if (!value->is_register()) {
924 // force into a register
925 LIR_Opr r = new_register(value->type());
926 __ move(value, r);
927 value = r;
928 }
929
930 // create a spill location
931 LIR_Opr tmp = new_register(t);
932 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
933
934 // move from register to spill
935 __ move(value, tmp);
936 return tmp;
937 }
938
939 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
940 if (if_instr->should_profile()) {
941 ciMethod* method = if_instr->profiled_method();
942 assert(method != NULL, "method should be set if branch is profiled");
943 ciMethodData* md = method->method_data_or_null();
944 assert(md != NULL, "Sanity");
945 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
946 assert(data != NULL, "must have profiling data");
947 assert(data->is_BranchData(), "need BranchData for two-way branches");
948 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
949 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
950 if (if_instr->is_swapped()) {
951 int t = taken_count_offset;
952 taken_count_offset = not_taken_count_offset;
953 not_taken_count_offset = t;
954 }
955
956 LIR_Opr md_reg = new_register(T_METADATA);
957 __ metadata2reg(md->constant_encoding(), md_reg);
958
959 LIR_Opr data_offset_reg = new_pointer_register();
960 __ cmove(lir_cond(cond),
961 LIR_OprFact::intptrConst(taken_count_offset),
962 LIR_OprFact::intptrConst(not_taken_count_offset),
963 data_offset_reg, as_BasicType(if_instr->x()->type()));
964
965 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
966 LIR_Opr data_reg = new_pointer_register();
967 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
968 __ move(data_addr, data_reg);
969 // Use leal instead of add to avoid destroying condition codes on x86
970 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
971 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
972 __ move(data_reg, data_addr);
973 }
974 }
975
976 // Phi technique:
977 // This is about passing live values from one basic block to the other.
978 // In code generated with Java it is rather rare that more than one
979 // value is on the stack from one basic block to the other.
980 // We optimize our technique for efficient passing of one value
981 // (of type long, int, double..) but it can be extended.
982 // When entering or leaving a basic block, all registers and all spill
983 // slots are release and empty. We use the released registers
984 // and spill slots to pass the live values from one block
985 // to the other. The topmost value, i.e., the value on TOS of expression
986 // stack is passed in registers. All other values are stored in spilling
987 // area. Every Phi has an index which designates its spill slot
988 // At exit of a basic block, we fill the register(s) and spill slots.
989 // At entry of a basic block, the block_prolog sets up the content of phi nodes
990 // and locks necessary registers and spilling slots.
991
992
993 // move current value to referenced phi function
994 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
995 Phi* phi = sux_val->as_Phi();
996 // cur_val can be null without phi being null in conjunction with inlining
997 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) {
998 LIR_Opr operand = cur_val->operand();
999 if (cur_val->operand()->is_illegal()) {
1000 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
1001 "these can be produced lazily");
1002 operand = operand_for_instruction(cur_val);
1003 }
1004 resolver->move(operand, operand_for_instruction(phi));
1005 }
1006 }
1007
1008
1009 // Moves all stack values into their PHI position
1010 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1011 BlockBegin* bb = block();
1012 if (bb->number_of_sux() == 1) {
1013 BlockBegin* sux = bb->sux_at(0);
1014 assert(sux->number_of_preds() > 0, "invalid CFG");
1015
1016 // a block with only one predecessor never has phi functions
1017 if (sux->number_of_preds() > 1) {
1018 int max_phis = cur_state->stack_size() + cur_state->locals_size();
1019 PhiResolver resolver(this, _virtual_register_number + max_phis * 2);
1020
1021 ValueStack* sux_state = sux->state();
1022 Value sux_value;
1023 int index;
1024
1025 assert(cur_state->scope() == sux_state->scope(), "not matching");
1026 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1027 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1028
1029 for_each_stack_value(sux_state, index, sux_value) {
1030 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1031 }
1032
1033 for_each_local_value(sux_state, index, sux_value) {
1034 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1035 }
1036
1037 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1038 }
1039 }
1040 }
1041
1042
1043 LIR_Opr LIRGenerator::new_register(BasicType type) {
1044 int vreg = _virtual_register_number;
1045 // add a little fudge factor for the bailout, since the bailout is
1046 // only checked periodically. This gives a few extra registers to
1047 // hand out before we really run out, which helps us keep from
1048 // tripping over assertions.
1049 if (vreg + 20 >= LIR_OprDesc::vreg_max) {
1050 bailout("out of virtual registers");
1051 if (vreg + 2 >= LIR_OprDesc::vreg_max) {
1052 // wrap it around
1053 _virtual_register_number = LIR_OprDesc::vreg_base;
1054 }
1055 }
1056 _virtual_register_number += 1;
1057 return LIR_OprFact::virtual_register(vreg, type);
1058 }
1059
1060
1061 // Try to lock using register in hint
1062 LIR_Opr LIRGenerator::rlock(Value instr) {
1063 return new_register(instr->type());
1064 }
1065
1066
1067 // does an rlock and sets result
1068 LIR_Opr LIRGenerator::rlock_result(Value x) {
1069 LIR_Opr reg = rlock(x);
1070 set_result(x, reg);
1071 return reg;
1072 }
1073
1074
1075 // does an rlock and sets result
1076 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1077 LIR_Opr reg;
1078 switch (type) {
1079 case T_BYTE:
1080 case T_BOOLEAN:
1081 reg = rlock_byte(type);
1082 break;
1083 default:
1084 reg = rlock(x);
1085 break;
1086 }
1087
1088 set_result(x, reg);
1089 return reg;
1090 }
1091
1092
1093 //---------------------------------------------------------------------
1094 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1095 ObjectType* oc = value->type()->as_ObjectType();
1096 if (oc) {
1097 return oc->constant_value();
1098 }
1099 return NULL;
1100 }
1101
1102
1103 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1104 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1105 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1106
1107 // no moves are created for phi functions at the begin of exception
1108 // handlers, so assign operands manually here
1109 for_each_phi_fun(block(), phi,
1110 operand_for_instruction(phi));
1111
1112 LIR_Opr thread_reg = getThreadPointer();
1113 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1114 exceptionOopOpr());
1115 __ move_wide(LIR_OprFact::oopConst(NULL),
1116 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1117 __ move_wide(LIR_OprFact::oopConst(NULL),
1118 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1119
1120 LIR_Opr result = new_register(T_OBJECT);
1121 __ move(exceptionOopOpr(), result);
1122 set_result(x, result);
1123 }
1124
1125
1126 //----------------------------------------------------------------------
1127 //----------------------------------------------------------------------
1128 //----------------------------------------------------------------------
1129 //----------------------------------------------------------------------
1130 // visitor functions
1131 //----------------------------------------------------------------------
1132 //----------------------------------------------------------------------
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135
1136 void LIRGenerator::do_Phi(Phi* x) {
1137 // phi functions are never visited directly
1138 ShouldNotReachHere();
1139 }
1140
1141
1142 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1143 void LIRGenerator::do_Constant(Constant* x) {
1144 if (x->state_before() != NULL) {
1145 // Any constant with a ValueStack requires patching so emit the patch here
1146 LIR_Opr reg = rlock_result(x);
1147 CodeEmitInfo* info = state_for(x, x->state_before());
1148 __ oop2reg_patch(NULL, reg, info);
1149 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1150 if (!x->is_pinned()) {
1151 // unpinned constants are handled specially so that they can be
1152 // put into registers when they are used multiple times within a
1153 // block. After the block completes their operand will be
1154 // cleared so that other blocks can't refer to that register.
1155 set_result(x, load_constant(x));
1156 } else {
1157 LIR_Opr res = x->operand();
1158 if (!res->is_valid()) {
1159 res = LIR_OprFact::value_type(x->type());
1160 }
1161 if (res->is_constant()) {
1162 LIR_Opr reg = rlock_result(x);
1163 __ move(res, reg);
1164 } else {
1165 set_result(x, res);
1166 }
1167 }
1168 } else {
1169 set_result(x, LIR_OprFact::value_type(x->type()));
1170 }
1171 }
1172
1173
1174 void LIRGenerator::do_Local(Local* x) {
1175 // operand_for_instruction has the side effect of setting the result
1176 // so there's no need to do it here.
1177 operand_for_instruction(x);
1178 }
1179
1180
1181 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) {
1182 Unimplemented();
1183 }
1184
1185
1186 void LIRGenerator::do_Return(Return* x) {
1187 if (compilation()->env()->dtrace_method_probes()) {
1188 BasicTypeList signature;
1189 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1190 signature.append(T_METADATA); // Method*
1191 LIR_OprList* args = new LIR_OprList();
1192 args->append(getThreadPointer());
1193 LIR_Opr meth = new_register(T_METADATA);
1194 __ metadata2reg(method()->constant_encoding(), meth);
1195 args->append(meth);
1196 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
1197 }
1198
1199 if (x->type()->is_void()) {
1200 __ return_op(LIR_OprFact::illegalOpr);
1201 } else {
1202 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1203 LIRItem result(x->result(), this);
1204
1205 result.load_item_force(reg);
1206 __ return_op(result.result());
1207 }
1208 set_no_result(x);
1209 }
1210
1211 // Examble: ref.get()
1212 // Combination of LoadField and g1 pre-write barrier
1213 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1214
1215 const int referent_offset = java_lang_ref_Reference::referent_offset;
1216 guarantee(referent_offset > 0, "referent offset not initialized");
1217
1218 assert(x->number_of_arguments() == 1, "wrong type");
1219
1220 LIRItem reference(x->argument_at(0), this);
1221 reference.load_item();
1222
1223 // need to perform the null check on the reference objecy
1224 CodeEmitInfo* info = NULL;
1225 if (x->needs_null_check()) {
1226 info = state_for(x);
1227 }
1228
1229 LIR_Address* referent_field_adr =
1230 new LIR_Address(reference.result(), referent_offset, T_OBJECT);
1231
1232 LIR_Opr result = rlock_result(x);
1233
1234 #if INCLUDE_ALL_GCS
1235 if (UseShenandoahGC) {
1236 LIR_Opr tmp = new_register(T_OBJECT);
1237 __ load(referent_field_adr, tmp, info);
1238 tmp = ShenandoahBarrierSet::barrier_set()->bsc1()->load_reference_barrier(this, tmp, NULL, true);
1239 __ move(tmp, result);
1240 } else
1241 #endif
1242 __ load(referent_field_adr, result, info);
1243
1244 // Register the value in the referent field with the pre-barrier
1245 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */,
1246 result /* pre_val */,
1247 false /* do_load */,
1248 false /* patch */,
1249 NULL /* info */);
1250 }
1251
1252 // Example: clazz.isInstance(object)
1253 void LIRGenerator::do_isInstance(Intrinsic* x) {
1254 assert(x->number_of_arguments() == 2, "wrong type");
1255
1256 // TODO could try to substitute this node with an equivalent InstanceOf
1257 // if clazz is known to be a constant Class. This will pick up newly found
1258 // constants after HIR construction. I'll leave this to a future change.
1259
1260 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1261 // could follow the aastore example in a future change.
1262
1263 LIRItem clazz(x->argument_at(0), this);
1264 LIRItem object(x->argument_at(1), this);
1265 clazz.load_item();
1266 object.load_item();
1267 LIR_Opr result = rlock_result(x);
1268
1269 // need to perform null check on clazz
1270 if (x->needs_null_check()) {
1271 CodeEmitInfo* info = state_for(x);
1272 __ null_check(clazz.result(), info);
1273 }
1274
1275 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1276 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1277 x->type(),
1278 NULL); // NULL CodeEmitInfo results in a leaf call
1279 __ move(call_result, result);
1280 }
1281
1282 // Example: object.getClass ()
1283 void LIRGenerator::do_getClass(Intrinsic* x) {
1284 assert(x->number_of_arguments() == 1, "wrong type");
1285
1286 LIRItem rcvr(x->argument_at(0), this);
1287 rcvr.load_item();
1288 LIR_Opr temp = new_register(T_METADATA);
1289 LIR_Opr result = rlock_result(x);
1290
1291 // need to perform the null check on the rcvr
1292 CodeEmitInfo* info = NULL;
1293 if (x->needs_null_check()) {
1294 info = state_for(x);
1295 }
1296
1297 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
1298 // meaning of these two is mixed up (see JDK-8026837).
1299 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1300 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result);
1301 }
1302
1303
1304 // Example: Thread.currentThread()
1305 void LIRGenerator::do_currentThread(Intrinsic* x) {
1306 assert(x->number_of_arguments() == 0, "wrong type");
1307 LIR_Opr reg = rlock_result(x);
1308 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg);
1309 }
1310
1311
1312 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1313 assert(x->number_of_arguments() == 1, "wrong type");
1314 LIRItem receiver(x->argument_at(0), this);
1315
1316 receiver.load_item();
1317 BasicTypeList signature;
1318 signature.append(T_OBJECT); // receiver
1319 LIR_OprList* args = new LIR_OprList();
1320 args->append(receiver.result());
1321 CodeEmitInfo* info = state_for(x, x->state());
1322 call_runtime(&signature, args,
1323 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1324 voidType, info);
1325
1326 set_no_result(x);
1327 }
1328
1329
1330 //------------------------local access--------------------------------------
1331
1332 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1333 if (x->operand()->is_illegal()) {
1334 Constant* c = x->as_Constant();
1335 if (c != NULL) {
1336 x->set_operand(LIR_OprFact::value_type(c->type()));
1337 } else {
1338 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
1339 // allocate a virtual register for this local or phi
1340 x->set_operand(rlock(x));
1341 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
1342 }
1343 }
1344 return x->operand();
1345 }
1346
1347
1348 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
1349 if (opr->is_virtual()) {
1350 return instruction_for_vreg(opr->vreg_number());
1351 }
1352 return NULL;
1353 }
1354
1355
1356 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1357 if (reg_num < _instruction_for_operand.length()) {
1358 return _instruction_for_operand.at(reg_num);
1359 }
1360 return NULL;
1361 }
1362
1363
1364 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1365 if (_vreg_flags.size_in_bits() == 0) {
1366 BitMap2D temp(100, num_vreg_flags);
1367 temp.clear();
1368 _vreg_flags = temp;
1369 }
1370 _vreg_flags.at_put_grow(vreg_num, f, true);
1371 }
1372
1373 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1374 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1375 return false;
1376 }
1377 return _vreg_flags.at(vreg_num, f);
1378 }
1379
1380
1381 // Block local constant handling. This code is useful for keeping
1382 // unpinned constants and constants which aren't exposed in the IR in
1383 // registers. Unpinned Constant instructions have their operands
1384 // cleared when the block is finished so that other blocks can't end
1385 // up referring to their registers.
1386
1387 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1388 assert(!x->is_pinned(), "only for unpinned constants");
1389 _unpinned_constants.append(x);
1390 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1391 }
1392
1393
1394 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1395 BasicType t = c->type();
1396 for (int i = 0; i < _constants.length(); i++) {
1397 LIR_Const* other = _constants.at(i);
1398 if (t == other->type()) {
1399 switch (t) {
1400 case T_INT:
1401 case T_FLOAT:
1402 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1403 break;
1404 case T_LONG:
1405 case T_DOUBLE:
1406 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1407 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1408 break;
1409 case T_OBJECT:
1410 if (c->as_jobject() != other->as_jobject()) continue;
1411 break;
1412 }
1413 return _reg_for_constants.at(i);
1414 }
1415 }
1416
1417 LIR_Opr result = new_register(t);
1418 __ move((LIR_Opr)c, result);
1419 _constants.append(c);
1420 _reg_for_constants.append(result);
1421 return result;
1422 }
1423
1424 // Various barriers
1425
1426 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
1427 bool do_load, bool patch, CodeEmitInfo* info) {
1428 // Do the pre-write barrier, if any.
1429 switch (_bs->kind()) {
1430 #if INCLUDE_ALL_GCS
1431 case BarrierSet::G1SATBCT:
1432 case BarrierSet::G1SATBCTLogging:
1433 G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info);
1434 break;
1435 case BarrierSet::ShenandoahBarrierSet:
1436 if (ShenandoahSATBBarrier) {
1437 G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info);
1438 }
1439 break;
1440 #endif // INCLUDE_ALL_GCS
1441 case BarrierSet::CardTableModRef:
1442 case BarrierSet::CardTableExtension:
1443 // No pre barriers
1444 break;
1445 case BarrierSet::ModRef:
1446 case BarrierSet::Other:
1447 // No pre barriers
1448 break;
1449 default :
1450 ShouldNotReachHere();
1451
1452 }
1453 }
1454
1455 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1456 switch (_bs->kind()) {
1457 #if INCLUDE_ALL_GCS
1458 case BarrierSet::G1SATBCT:
1459 case BarrierSet::G1SATBCTLogging:
1460 G1SATBCardTableModRef_post_barrier(addr, new_val);
1461 break;
1462 case BarrierSet::ShenandoahBarrierSet:
1463 ShenandoahBarrierSetC1::bsc1()->storeval_barrier(this, new_val, NULL, false);
1464 break;
1465 #endif // INCLUDE_ALL_GCS
1466 case BarrierSet::CardTableModRef:
1467 case BarrierSet::CardTableExtension:
1468 CardTableModRef_post_barrier(addr, new_val);
1469 break;
1470 case BarrierSet::ModRef:
1471 case BarrierSet::Other:
1472 // No post barriers
1473 break;
1474 default :
1475 ShouldNotReachHere();
1476 }
1477 }
1478
1479 ////////////////////////////////////////////////////////////////////////
1480 #if INCLUDE_ALL_GCS
1481
1482 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
1483 bool do_load, bool patch, CodeEmitInfo* info) {
1484 // First we test whether marking is in progress.
1485 BasicType flag_type;
1486 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
1487 flag_type = T_INT;
1488 } else {
1489 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1,
1490 "Assumption");
1491 flag_type = T_BYTE;
1492 }
1493 LIR_Opr thrd = getThreadPointer();
1494 LIR_Address* mark_active_flag_addr =
1495 new LIR_Address(thrd,
1496 in_bytes(JavaThread::satb_mark_queue_offset() +
1497 PtrQueue::byte_offset_of_active()),
1498 flag_type);
1499 // Read the marking-in-progress flag.
1500 LIR_Opr flag_val = new_register(T_INT);
1501 __ load(mark_active_flag_addr, flag_val);
1502 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0));
1503
1504 LIR_PatchCode pre_val_patch_code = lir_patch_none;
1505
1506 CodeStub* slow;
1507
1508 if (do_load) {
1509 assert(pre_val == LIR_OprFact::illegalOpr, "sanity");
1510 assert(addr_opr != LIR_OprFact::illegalOpr, "sanity");
1511
1512 if (patch)
1513 pre_val_patch_code = lir_patch_normal;
1514
1515 pre_val = new_register(T_OBJECT);
1516
1517 if (!addr_opr->is_address()) {
1518 assert(addr_opr->is_register(), "must be");
1519 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT));
1520 }
1521 slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, info);
1522 } else {
1523 assert(addr_opr == LIR_OprFact::illegalOpr, "sanity");
1524 assert(pre_val->is_register(), "must be");
1525 assert(pre_val->type() == T_OBJECT, "must be an object");
1526 assert(info == NULL, "sanity");
1527
1528 slow = new G1PreBarrierStub(pre_val);
1529 }
1530
1531 __ branch(lir_cond_notEqual, T_INT, slow);
1532 __ branch_destination(slow->continuation());
1533 }
1534
1535 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1536 // If the "new_val" is a constant NULL, no barrier is necessary.
1537 if (new_val->is_constant() &&
1538 new_val->as_constant_ptr()->as_jobject() == NULL) return;
1539
1540 if (!new_val->is_register()) {
1541 LIR_Opr new_val_reg = new_register(T_OBJECT);
1542 if (new_val->is_constant()) {
1543 __ move(new_val, new_val_reg);
1544 } else {
1545 __ leal(new_val, new_val_reg);
1546 }
1547 new_val = new_val_reg;
1548 }
1549 assert(new_val->is_register(), "must be a register at this point");
1550
1551 if (addr->is_address()) {
1552 LIR_Address* address = addr->as_address_ptr();
1553 LIR_Opr ptr = new_pointer_register();
1554 if (!address->index()->is_valid() && address->disp() == 0) {
1555 __ move(address->base(), ptr);
1556 } else {
1557 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
1558 __ leal(addr, ptr);
1559 }
1560 addr = ptr;
1561 }
1562 assert(addr->is_register(), "must be a register at this point");
1563
1564 LIR_Opr xor_res = new_pointer_register();
1565 LIR_Opr xor_shift_res = new_pointer_register();
1566 if (TwoOperandLIRForm ) {
1567 __ move(addr, xor_res);
1568 __ logical_xor(xor_res, new_val, xor_res);
1569 __ move(xor_res, xor_shift_res);
1570 __ unsigned_shift_right(xor_shift_res,
1571 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
1572 xor_shift_res,
1573 LIR_OprDesc::illegalOpr());
1574 } else {
1575 __ logical_xor(addr, new_val, xor_res);
1576 __ unsigned_shift_right(xor_res,
1577 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
1578 xor_shift_res,
1579 LIR_OprDesc::illegalOpr());
1580 }
1581
1582 if (!new_val->is_register()) {
1583 LIR_Opr new_val_reg = new_register(T_OBJECT);
1584 __ leal(new_val, new_val_reg);
1585 new_val = new_val_reg;
1586 }
1587 assert(new_val->is_register(), "must be a register at this point");
1588
1589 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD));
1590
1591 CodeStub* slow = new G1PostBarrierStub(addr, new_val);
1592 __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow);
1593 __ branch_destination(slow->continuation());
1594 }
1595
1596 #endif // INCLUDE_ALL_GCS
1597 ////////////////////////////////////////////////////////////////////////
1598
1599 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1600
1601 assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code");
1602 LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base);
1603 if (addr->is_address()) {
1604 LIR_Address* address = addr->as_address_ptr();
1605 // ptr cannot be an object because we use this barrier for array card marks
1606 // and addr can point in the middle of an array.
1607 LIR_Opr ptr = new_pointer_register();
1608 if (!address->index()->is_valid() && address->disp() == 0) {
1609 __ move(address->base(), ptr);
1610 } else {
1611 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
1612 __ leal(addr, ptr);
1613 }
1614 addr = ptr;
1615 }
1616 assert(addr->is_register(), "must be a register at this point");
1617
1618 #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER
1619 CardTableModRef_post_barrier_helper(addr, card_table_base);
1620 #else
1621 LIR_Opr tmp = new_pointer_register();
1622 if (TwoOperandLIRForm) {
1623 __ move(addr, tmp);
1624 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp);
1625 } else {
1626 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp);
1627 }
1628 if (can_inline_as_constant(card_table_base)) {
1629 __ move(LIR_OprFact::intConst(0),
1630 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE));
1631 } else {
1632 __ move(LIR_OprFact::intConst(0),
1633 new LIR_Address(tmp, load_constant(card_table_base),
1634 T_BYTE));
1635 }
1636 #endif
1637 }
1638
1639
1640 //------------------------field access--------------------------------------
1641
1642 // Comment copied form templateTable_i486.cpp
1643 // ----------------------------------------------------------------------------
1644 // Volatile variables demand their effects be made known to all CPU's in
1645 // order. Store buffers on most chips allow reads & writes to reorder; the
1646 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1647 // memory barrier (i.e., it's not sufficient that the interpreter does not
1648 // reorder volatile references, the hardware also must not reorder them).
1649 //
1650 // According to the new Java Memory Model (JMM):
1651 // (1) All volatiles are serialized wrt to each other.
1652 // ALSO reads & writes act as aquire & release, so:
1653 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1654 // the read float up to before the read. It's OK for non-volatile memory refs
1655 // that happen before the volatile read to float down below it.
1656 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1657 // that happen BEFORE the write float down to after the write. It's OK for
1658 // non-volatile memory refs that happen after the volatile write to float up
1659 // before it.
1660 //
1661 // We only put in barriers around volatile refs (they are expensive), not
1662 // _between_ memory refs (that would require us to track the flavor of the
1663 // previous memory refs). Requirements (2) and (3) require some barriers
1664 // before volatile stores and after volatile loads. These nearly cover
1665 // requirement (1) but miss the volatile-store-volatile-load case. This final
1666 // case is placed after volatile-stores although it could just as well go
1667 // before volatile-loads.
1668
1669
1670 void LIRGenerator::do_StoreField(StoreField* x) {
1671 bool needs_patching = x->needs_patching();
1672 bool is_volatile = x->field()->is_volatile();
1673 BasicType field_type = x->field_type();
1674 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT);
1675
1676 CodeEmitInfo* info = NULL;
1677 if (needs_patching) {
1678 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1679 info = state_for(x, x->state_before());
1680 } else if (x->needs_null_check()) {
1681 NullCheck* nc = x->explicit_null_check();
1682 if (nc == NULL) {
1683 info = state_for(x);
1684 } else {
1685 info = state_for(nc);
1686 }
1687 }
1688
1689
1690 LIRItem object(x->obj(), this);
1691 LIRItem value(x->value(), this);
1692
1693 object.load_item();
1694
1695 if (is_volatile || needs_patching) {
1696 // load item if field is volatile (fewer special cases for volatiles)
1697 // load item if field not initialized
1698 // load item if field not constant
1699 // because of code patching we cannot inline constants
1700 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1701 value.load_byte_item();
1702 } else {
1703 value.load_item();
1704 }
1705 } else {
1706 value.load_for_store(field_type);
1707 }
1708
1709 set_no_result(x);
1710
1711 #ifndef PRODUCT
1712 if (PrintNotLoaded && needs_patching) {
1713 tty->print_cr(" ###class not loaded at store_%s bci %d",
1714 x->is_static() ? "static" : "field", x->printable_bci());
1715 }
1716 #endif
1717
1718 if (x->needs_null_check() &&
1719 (needs_patching ||
1720 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1721 // Emit an explicit null check because the offset is too large.
1722 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1723 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1724 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1725 }
1726
1727 LIR_Address* address;
1728 if (needs_patching) {
1729 // we need to patch the offset in the instruction so don't allow
1730 // generate_address to try to be smart about emitting the -1.
1731 // Otherwise the patching code won't know how to find the
1732 // instruction to patch.
1733 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type);
1734 } else {
1735 address = generate_address(object.result(), x->offset(), field_type);
1736 }
1737
1738 if (is_volatile && os::is_MP()) {
1739 __ membar_release();
1740 }
1741
1742 if (is_oop) {
1743 // Do the pre-write barrier, if any.
1744 pre_barrier(LIR_OprFact::address(address),
1745 LIR_OprFact::illegalOpr /* pre_val */,
1746 true /* do_load*/,
1747 needs_patching,
1748 (info ? new CodeEmitInfo(info) : NULL));
1749 }
1750
1751 if (is_volatile && !needs_patching) {
1752 volatile_field_store(value.result(), address, info);
1753 } else {
1754 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
1755 __ store(value.result(), address, info, patch_code);
1756 }
1757
1758 if (is_oop) {
1759 // Store to object so mark the card of the header
1760 post_barrier(object.result(), value.result());
1761 }
1762
1763 if (is_volatile && os::is_MP()) {
1764 __ membar();
1765 }
1766 }
1767
1768
1769 void LIRGenerator::do_LoadField(LoadField* x) {
1770 bool needs_patching = x->needs_patching();
1771 bool is_volatile = x->field()->is_volatile();
1772 BasicType field_type = x->field_type();
1773
1774 CodeEmitInfo* info = NULL;
1775 if (needs_patching) {
1776 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1777 info = state_for(x, x->state_before());
1778 } else if (x->needs_null_check()) {
1779 NullCheck* nc = x->explicit_null_check();
1780 if (nc == NULL) {
1781 info = state_for(x);
1782 } else {
1783 info = state_for(nc);
1784 }
1785 }
1786
1787 LIRItem object(x->obj(), this);
1788
1789 object.load_item();
1790
1791 #ifndef PRODUCT
1792 if (PrintNotLoaded && needs_patching) {
1793 tty->print_cr(" ###class not loaded at load_%s bci %d",
1794 x->is_static() ? "static" : "field", x->printable_bci());
1795 }
1796 #endif
1797
1798 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1799 if (x->needs_null_check() &&
1800 (needs_patching ||
1801 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1802 stress_deopt)) {
1803 LIR_Opr obj = object.result();
1804 if (stress_deopt) {
1805 obj = new_register(T_OBJECT);
1806 __ move(LIR_OprFact::oopConst(NULL), obj);
1807 }
1808 // Emit an explicit null check because the offset is too large.
1809 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1810 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1811 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1812 }
1813
1814 LIR_Opr reg = rlock_result(x, field_type);
1815 LIR_Address* address;
1816 if (needs_patching) {
1817 // we need to patch the offset in the instruction so don't allow
1818 // generate_address to try to be smart about emitting the -1.
1819 // Otherwise the patching code won't know how to find the
1820 // instruction to patch.
1821 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type);
1822 } else {
1823 address = generate_address(object.result(), x->offset(), field_type);
1824 }
1825
1826 #if INCLUDE_ALL_GCS
1827 if (UseShenandoahGC && (field_type == T_OBJECT || field_type == T_ARRAY)) {
1828 LIR_Opr tmp = new_register(T_OBJECT);
1829 if (is_volatile && !needs_patching) {
1830 volatile_field_load(address, tmp, info);
1831 } else {
1832 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
1833 __ load(address, tmp, info, patch_code);
1834 }
1835 if (is_volatile && os::is_MP()) {
1836 __ membar_acquire();
1837 }
1838 tmp = ShenandoahBarrierSet::barrier_set()->bsc1()->load_reference_barrier(this, tmp, NULL, true);
1839 __ move(tmp, reg);
1840 } else
1841 #endif
1842 {
1843 if (is_volatile && !needs_patching) {
1844 volatile_field_load(address, reg, info);
1845 } else {
1846 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
1847 __ load(address, reg, info, patch_code);
1848 }
1849 if (is_volatile && os::is_MP()) {
1850 __ membar_acquire();
1851 }
1852 }
1853 }
1854
1855
1856 //------------------------java.nio.Buffer.checkIndex------------------------
1857
1858 // int java.nio.Buffer.checkIndex(int)
1859 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
1860 // NOTE: by the time we are in checkIndex() we are guaranteed that
1861 // the buffer is non-null (because checkIndex is package-private and
1862 // only called from within other methods in the buffer).
1863 assert(x->number_of_arguments() == 2, "wrong type");
1864 LIRItem buf (x->argument_at(0), this);
1865 LIRItem index(x->argument_at(1), this);
1866 buf.load_item();
1867 index.load_item();
1868
1869 LIR_Opr result = rlock_result(x);
1870 if (GenerateRangeChecks) {
1871 CodeEmitInfo* info = state_for(x);
1872 CodeStub* stub = new RangeCheckStub(info, index.result(), true);
1873 if (index.result()->is_constant()) {
1874 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
1875 __ branch(lir_cond_belowEqual, T_INT, stub);
1876 } else {
1877 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(),
1878 java_nio_Buffer::limit_offset(), T_INT, info);
1879 __ branch(lir_cond_aboveEqual, T_INT, stub);
1880 }
1881 __ move(index.result(), result);
1882 } else {
1883 // Just load the index into the result register
1884 __ move(index.result(), result);
1885 }
1886 }
1887
1888
1889 //------------------------array access--------------------------------------
1890
1891
1892 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1893 LIRItem array(x->array(), this);
1894 array.load_item();
1895 LIR_Opr reg = rlock_result(x);
1896
1897 CodeEmitInfo* info = NULL;
1898 if (x->needs_null_check()) {
1899 NullCheck* nc = x->explicit_null_check();
1900 if (nc == NULL) {
1901 info = state_for(x);
1902 } else {
1903 info = state_for(nc);
1904 }
1905 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1906 LIR_Opr obj = new_register(T_OBJECT);
1907 __ move(LIR_OprFact::oopConst(NULL), obj);
1908 __ null_check(obj, new CodeEmitInfo(info));
1909 }
1910 }
1911 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1912 }
1913
1914
1915 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1916 bool use_length = x->length() != NULL;
1917 LIRItem array(x->array(), this);
1918 LIRItem index(x->index(), this);
1919 LIRItem length(this);
1920 bool needs_range_check = x->compute_needs_range_check();
1921
1922 if (use_length && needs_range_check) {
1923 length.set_instruction(x->length());
1924 length.load_item();
1925 }
1926
1927 array.load_item();
1928 if (index.is_constant() && can_inline_as_constant(x->index())) {
1929 // let it be a constant
1930 index.dont_load_item();
1931 } else {
1932 index.load_item();
1933 }
1934
1935 CodeEmitInfo* range_check_info = state_for(x);
1936 CodeEmitInfo* null_check_info = NULL;
1937 if (x->needs_null_check()) {
1938 NullCheck* nc = x->explicit_null_check();
1939 if (nc != NULL) {
1940 null_check_info = state_for(nc);
1941 } else {
1942 null_check_info = range_check_info;
1943 }
1944 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
1945 LIR_Opr obj = new_register(T_OBJECT);
1946 __ move(LIR_OprFact::oopConst(NULL), obj);
1947 __ null_check(obj, new CodeEmitInfo(null_check_info));
1948 }
1949 }
1950
1951 // emit array address setup early so it schedules better
1952 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false);
1953
1954 if (GenerateRangeChecks && needs_range_check) {
1955 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
1956 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result()));
1957 } else if (use_length) {
1958 // TODO: use a (modified) version of array_range_check that does not require a
1959 // constant length to be loaded to a register
1960 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1961 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
1962 } else {
1963 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1964 // The range check performs the null check, so clear it out for the load
1965 null_check_info = NULL;
1966 }
1967 }
1968
1969 LIR_Opr result = rlock_result(x, x->elt_type());
1970
1971 #if INCLUDE_ALL_GCS
1972 if (UseShenandoahGC && (x->elt_type() == T_OBJECT || x->elt_type() == T_ARRAY)) {
1973 LIR_Opr tmp = new_register(T_OBJECT);
1974 __ move(array_addr, tmp, null_check_info);
1975 tmp = ShenandoahBarrierSet::barrier_set()->bsc1()->load_reference_barrier(this, tmp, NULL, true);
1976 __ move(tmp, result);
1977 } else
1978 #endif
1979 __ move(array_addr, result, null_check_info);
1980
1981 }
1982
1983
1984 void LIRGenerator::do_NullCheck(NullCheck* x) {
1985 if (x->can_trap()) {
1986 LIRItem value(x->obj(), this);
1987 value.load_item();
1988 CodeEmitInfo* info = state_for(x);
1989 __ null_check(value.result(), info);
1990 }
1991 }
1992
1993
1994 void LIRGenerator::do_TypeCast(TypeCast* x) {
1995 LIRItem value(x->obj(), this);
1996 value.load_item();
1997 // the result is the same as from the node we are casting
1998 set_result(x, value.result());
1999 }
2000
2001
2002 void LIRGenerator::do_Throw(Throw* x) {
2003 LIRItem exception(x->exception(), this);
2004 exception.load_item();
2005 set_no_result(x);
2006 LIR_Opr exception_opr = exception.result();
2007 CodeEmitInfo* info = state_for(x, x->state());
2008
2009 #ifndef PRODUCT
2010 if (PrintC1Statistics) {
2011 increment_counter(Runtime1::throw_count_address(), T_INT);
2012 }
2013 #endif
2014
2015 // check if the instruction has an xhandler in any of the nested scopes
2016 bool unwind = false;
2017 if (info->exception_handlers()->length() == 0) {
2018 // this throw is not inside an xhandler
2019 unwind = true;
2020 } else {
2021 // get some idea of the throw type
2022 bool type_is_exact = true;
2023 ciType* throw_type = x->exception()->exact_type();
2024 if (throw_type == NULL) {
2025 type_is_exact = false;
2026 throw_type = x->exception()->declared_type();
2027 }
2028 if (throw_type != NULL && throw_type->is_instance_klass()) {
2029 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
2030 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
2031 }
2032 }
2033
2034 // do null check before moving exception oop into fixed register
2035 // to avoid a fixed interval with an oop during the null check.
2036 // Use a copy of the CodeEmitInfo because debug information is
2037 // different for null_check and throw.
2038 if (GenerateCompilerNullChecks &&
2039 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) {
2040 // if the exception object wasn't created using new then it might be null.
2041 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
2042 }
2043
2044 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2045 // we need to go through the exception lookup path to get JVMTI
2046 // notification done
2047 unwind = false;
2048 }
2049
2050 // move exception oop into fixed register
2051 __ move(exception_opr, exceptionOopOpr());
2052
2053 if (unwind) {
2054 __ unwind_exception(exceptionOopOpr());
2055 } else {
2056 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2057 }
2058 }
2059
2060
2061 void LIRGenerator::do_RoundFP(RoundFP* x) {
2062 LIRItem input(x->input(), this);
2063 input.load_item();
2064 LIR_Opr input_opr = input.result();
2065 assert(input_opr->is_register(), "why round if value is not in a register?");
2066 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2067 if (input_opr->is_single_fpu()) {
2068 set_result(x, round_item(input_opr)); // This code path not currently taken
2069 } else {
2070 LIR_Opr result = new_register(T_DOUBLE);
2071 set_vreg_flag(result, must_start_in_memory);
2072 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2073 set_result(x, result);
2074 }
2075 }
2076
2077 // Here UnsafeGetRaw may have x->base() and x->index() be int or long
2078 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit.
2079 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
2080 LIRItem base(x->base(), this);
2081 LIRItem idx(this);
2082
2083 base.load_item();
2084 if (x->has_index()) {
2085 idx.set_instruction(x->index());
2086 idx.load_nonconstant();
2087 }
2088
2089 LIR_Opr reg = rlock_result(x, x->basic_type());
2090
2091 int log2_scale = 0;
2092 if (x->has_index()) {
2093 log2_scale = x->log2_scale();
2094 }
2095
2096 assert(!x->has_index() || idx.value() == x->index(), "should match");
2097
2098 LIR_Opr base_op = base.result();
2099 LIR_Opr index_op = idx.result();
2100 #ifndef _LP64
2101 if (base_op->type() == T_LONG) {
2102 base_op = new_register(T_INT);
2103 __ convert(Bytecodes::_l2i, base.result(), base_op);
2104 }
2105 if (x->has_index()) {
2106 if (index_op->type() == T_LONG) {
2107 LIR_Opr long_index_op = index_op;
2108 if (index_op->is_constant()) {
2109 long_index_op = new_register(T_LONG);
2110 __ move(index_op, long_index_op);
2111 }
2112 index_op = new_register(T_INT);
2113 __ convert(Bytecodes::_l2i, long_index_op, index_op);
2114 } else {
2115 assert(x->index()->type()->tag() == intTag, "must be");
2116 }
2117 }
2118 // At this point base and index should be all ints.
2119 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2120 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int");
2121 #else
2122 if (x->has_index()) {
2123 if (index_op->type() == T_INT) {
2124 if (!index_op->is_constant()) {
2125 index_op = new_register(T_LONG);
2126 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2127 }
2128 } else {
2129 assert(index_op->type() == T_LONG, "must be");
2130 if (index_op->is_constant()) {
2131 index_op = new_register(T_LONG);
2132 __ move(idx.result(), index_op);
2133 }
2134 }
2135 }
2136 // At this point base is a long non-constant
2137 // Index is a long register or a int constant.
2138 // We allow the constant to stay an int because that would allow us a more compact encoding by
2139 // embedding an immediate offset in the address expression. If we have a long constant, we have to
2140 // move it into a register first.
2141 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant");
2142 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) ||
2143 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type");
2144 #endif
2145
2146 BasicType dst_type = x->basic_type();
2147
2148 LIR_Address* addr;
2149 if (index_op->is_constant()) {
2150 assert(log2_scale == 0, "must not have a scale");
2151 assert(index_op->type() == T_INT, "only int constants supported");
2152 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
2153 } else {
2154 #if defined(X86) || defined(AARCH64)
2155 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
2156 #elif defined(GENERATE_ADDRESS_IS_PREFERRED)
2157 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type);
2158 #else
2159 if (index_op->is_illegal() || log2_scale == 0) {
2160 addr = new LIR_Address(base_op, index_op, dst_type);
2161 } else {
2162 LIR_Opr tmp = new_pointer_register();
2163 __ shift_left(index_op, log2_scale, tmp);
2164 addr = new LIR_Address(base_op, tmp, dst_type);
2165 }
2166 #endif
2167 }
2168
2169 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
2170 __ unaligned_move(addr, reg);
2171 } else {
2172 if (dst_type == T_OBJECT && x->is_wide()) {
2173 __ move_wide(addr, reg);
2174 } else {
2175 __ move(addr, reg);
2176 }
2177 }
2178 }
2179
2180
2181 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
2182 int log2_scale = 0;
2183 BasicType type = x->basic_type();
2184
2185 if (x->has_index()) {
2186 log2_scale = x->log2_scale();
2187 }
2188
2189 LIRItem base(x->base(), this);
2190 LIRItem value(x->value(), this);
2191 LIRItem idx(this);
2192
2193 base.load_item();
2194 if (x->has_index()) {
2195 idx.set_instruction(x->index());
2196 idx.load_item();
2197 }
2198
2199 if (type == T_BYTE || type == T_BOOLEAN) {
2200 value.load_byte_item();
2201 } else {
2202 value.load_item();
2203 }
2204
2205 set_no_result(x);
2206
2207 LIR_Opr base_op = base.result();
2208 LIR_Opr index_op = idx.result();
2209
2210 #ifdef GENERATE_ADDRESS_IS_PREFERRED
2211 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type());
2212 #else
2213 #ifndef _LP64
2214 if (base_op->type() == T_LONG) {
2215 base_op = new_register(T_INT);
2216 __ convert(Bytecodes::_l2i, base.result(), base_op);
2217 }
2218 if (x->has_index()) {
2219 if (index_op->type() == T_LONG) {
2220 index_op = new_register(T_INT);
2221 __ convert(Bytecodes::_l2i, idx.result(), index_op);
2222 }
2223 }
2224 // At this point base and index should be all ints and not constants
2225 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2226 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int");
2227 #else
2228 if (x->has_index()) {
2229 if (index_op->type() == T_INT) {
2230 index_op = new_register(T_LONG);
2231 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2232 }
2233 }
2234 // At this point base and index are long and non-constant
2235 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long");
2236 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long");
2237 #endif
2238
2239 if (log2_scale != 0) {
2240 // temporary fix (platform dependent code without shift on Intel would be better)
2241 // TODO: ARM also allows embedded shift in the address
2242 LIR_Opr tmp = new_pointer_register();
2243 if (TwoOperandLIRForm) {
2244 __ move(index_op, tmp);
2245 index_op = tmp;
2246 }
2247 __ shift_left(index_op, log2_scale, tmp);
2248 if (!TwoOperandLIRForm) {
2249 index_op = tmp;
2250 }
2251 }
2252
2253 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
2254 #endif // !GENERATE_ADDRESS_IS_PREFERRED
2255 __ move(value.result(), addr);
2256 }
2257
2258
2259 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
2260 BasicType type = x->basic_type();
2261 LIRItem src(x->object(), this);
2262 LIRItem off(x->offset(), this);
2263
2264 off.load_item();
2265 src.load_item();
2266
2267 LIR_Opr value = rlock_result(x, x->basic_type());
2268
2269 #if INCLUDE_ALL_GCS
2270 if (UseShenandoahGC && (type == T_OBJECT || type == T_ARRAY)) {
2271 LIR_Opr tmp = new_register(T_OBJECT);
2272 get_Object_unsafe(tmp, src.result(), off.result(), type, x->is_volatile());
2273 tmp = ShenandoahBarrierSet::barrier_set()->bsc1()->load_reference_barrier(this, tmp, NULL, true);
2274 __ move(tmp, value);
2275 } else
2276 #endif
2277 get_Object_unsafe(value, src.result(), off.result(), type, x->is_volatile());
2278
2279 #if INCLUDE_ALL_GCS
2280 // We might be reading the value of the referent field of a
2281 // Reference object in order to attach it back to the live
2282 // object graph. If G1 is enabled then we need to record
2283 // the value that is being returned in an SATB log buffer.
2284 //
2285 // We need to generate code similar to the following...
2286 //
2287 // if (offset == java_lang_ref_Reference::referent_offset) {
2288 // if (src != NULL) {
2289 // if (klass(src)->reference_type() != REF_NONE) {
2290 // pre_barrier(..., value, ...);
2291 // }
2292 // }
2293 // }
2294
2295 if ((UseShenandoahGC || UseG1GC) && type == T_OBJECT) {
2296 bool gen_pre_barrier = true; // Assume we need to generate pre_barrier.
2297 bool gen_offset_check = true; // Assume we need to generate the offset guard.
2298 bool gen_source_check = true; // Assume we need to check the src object for null.
2299 bool gen_type_check = true; // Assume we need to check the reference_type.
2300
2301 if (off.is_constant()) {
2302 jlong off_con = (off.type()->is_int() ?
2303 (jlong) off.get_jint_constant() :
2304 off.get_jlong_constant());
2305
2306
2307 if (off_con != (jlong) java_lang_ref_Reference::referent_offset) {
2308 // The constant offset is something other than referent_offset.
2309 // We can skip generating/checking the remaining guards and
2310 // skip generation of the code stub.
2311 gen_pre_barrier = false;
2312 } else {
2313 // The constant offset is the same as referent_offset -
2314 // we do not need to generate a runtime offset check.
2315 gen_offset_check = false;
2316 }
2317 }
2318
2319 // We don't need to generate stub if the source object is an array
2320 if (gen_pre_barrier && src.type()->is_array()) {
2321 gen_pre_barrier = false;
2322 }
2323
2324 if (gen_pre_barrier) {
2325 // We still need to continue with the checks.
2326 if (src.is_constant()) {
2327 ciObject* src_con = src.get_jobject_constant();
2328 guarantee(src_con != NULL, "no source constant");
2329
2330 if (src_con->is_null_object()) {
2331 // The constant src object is null - We can skip
2332 // generating the code stub.
2333 gen_pre_barrier = false;
2334 } else {
2335 // Non-null constant source object. We still have to generate
2336 // the slow stub - but we don't need to generate the runtime
2337 // null object check.
2338 gen_source_check = false;
2339 }
2340 }
2341 }
2342 if (gen_pre_barrier && !PatchALot) {
2343 // Can the klass of object be statically determined to be
2344 // a sub-class of Reference?
2345 ciType* type = src.value()->declared_type();
2346 if ((type != NULL) && type->is_loaded()) {
2347 if (type->is_subtype_of(compilation()->env()->Reference_klass())) {
2348 gen_type_check = false;
2349 } else if (type->is_klass() &&
2350 !compilation()->env()->Object_klass()->is_subtype_of(type->as_klass())) {
2351 // Not Reference and not Object klass.
2352 gen_pre_barrier = false;
2353 }
2354 }
2355 }
2356
2357 if (gen_pre_barrier) {
2358 LabelObj* Lcont = new LabelObj();
2359
2360 // We can have generate one runtime check here. Let's start with
2361 // the offset check.
2362 // Allocate temp register to src and load it here, otherwise
2363 // control flow below may confuse register allocator.
2364 LIR_Opr src_reg = new_register(T_OBJECT);
2365 __ move(src.result(), src_reg);
2366 if (gen_offset_check) {
2367 // if (offset != referent_offset) -> continue
2368 // If offset is an int then we can do the comparison with the
2369 // referent_offset constant; otherwise we need to move
2370 // referent_offset into a temporary register and generate
2371 // a reg-reg compare.
2372
2373 LIR_Opr referent_off;
2374
2375 if (off.type()->is_int()) {
2376 referent_off = LIR_OprFact::intConst(java_lang_ref_Reference::referent_offset);
2377 } else {
2378 assert(off.type()->is_long(), "what else?");
2379 referent_off = new_register(T_LONG);
2380 __ move(LIR_OprFact::longConst(java_lang_ref_Reference::referent_offset), referent_off);
2381 }
2382 __ cmp(lir_cond_notEqual, off.result(), referent_off);
2383 __ branch(lir_cond_notEqual, as_BasicType(off.type()), Lcont->label());
2384 }
2385 if (gen_source_check) {
2386 // offset is a const and equals referent offset
2387 // if (source == null) -> continue
2388 __ cmp(lir_cond_equal, src_reg, LIR_OprFact::oopConst(NULL));
2389 __ branch(lir_cond_equal, T_OBJECT, Lcont->label());
2390 }
2391 LIR_Opr src_klass = new_register(T_OBJECT);
2392 if (gen_type_check) {
2393 // We have determined that offset == referent_offset && src != null.
2394 // if (src->_klass->_reference_type == REF_NONE) -> continue
2395 __ move(new LIR_Address(src_reg, oopDesc::klass_offset_in_bytes(), T_ADDRESS), src_klass);
2396 LIR_Address* reference_type_addr = new LIR_Address(src_klass, in_bytes(InstanceKlass::reference_type_offset()), T_BYTE);
2397 LIR_Opr reference_type = new_register(T_INT);
2398 __ move(reference_type_addr, reference_type);
2399 __ cmp(lir_cond_equal, reference_type, LIR_OprFact::intConst(REF_NONE));
2400 __ branch(lir_cond_equal, T_INT, Lcont->label());
2401 }
2402 {
2403 // We have determined that src->_klass->_reference_type != REF_NONE
2404 // so register the value in the referent field with the pre-barrier.
2405 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */,
2406 value /* pre_val */,
2407 false /* do_load */,
2408 false /* patch */,
2409 NULL /* info */);
2410 }
2411 __ branch_destination(Lcont->label());
2412 }
2413 }
2414 #endif // INCLUDE_ALL_GCS
2415
2416 if (x->is_volatile() && os::is_MP()) __ membar_acquire();
2417 }
2418
2419
2420 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
2421 BasicType type = x->basic_type();
2422 LIRItem src(x->object(), this);
2423 LIRItem off(x->offset(), this);
2424 LIRItem data(x->value(), this);
2425
2426 src.load_item();
2427 if (type == T_BOOLEAN || type == T_BYTE) {
2428 data.load_byte_item();
2429 } else {
2430 data.load_item();
2431 }
2432 off.load_item();
2433
2434 set_no_result(x);
2435
2436 if (x->is_volatile() && os::is_MP()) __ membar_release();
2437 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile());
2438 if (x->is_volatile() && os::is_MP()) __ membar();
2439 }
2440
2441
2442 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) {
2443 LIRItem src(x->object(), this);
2444 LIRItem off(x->offset(), this);
2445
2446 src.load_item();
2447 if (off.is_constant() && can_inline_as_constant(x->offset())) {
2448 // let it be a constant
2449 off.dont_load_item();
2450 } else {
2451 off.load_item();
2452 }
2453
2454 set_no_result(x);
2455
2456 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE);
2457 __ prefetch(addr, is_store);
2458 }
2459
2460
2461 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) {
2462 do_UnsafePrefetch(x, false);
2463 }
2464
2465
2466 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) {
2467 do_UnsafePrefetch(x, true);
2468 }
2469
2470
2471 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2472 int lng = x->length();
2473
2474 for (int i = 0; i < lng; i++) {
2475 SwitchRange* one_range = x->at(i);
2476 int low_key = one_range->low_key();
2477 int high_key = one_range->high_key();
2478 BlockBegin* dest = one_range->sux();
2479 if (low_key == high_key) {
2480 __ cmp(lir_cond_equal, value, low_key);
2481 __ branch(lir_cond_equal, T_INT, dest);
2482 } else if (high_key - low_key == 1) {
2483 __ cmp(lir_cond_equal, value, low_key);
2484 __ branch(lir_cond_equal, T_INT, dest);
2485 __ cmp(lir_cond_equal, value, high_key);
2486 __ branch(lir_cond_equal, T_INT, dest);
2487 } else {
2488 LabelObj* L = new LabelObj();
2489 __ cmp(lir_cond_less, value, low_key);
2490 __ branch(lir_cond_less, T_INT, L->label());
2491 __ cmp(lir_cond_lessEqual, value, high_key);
2492 __ branch(lir_cond_lessEqual, T_INT, dest);
2493 __ branch_destination(L->label());
2494 }
2495 }
2496 __ jump(default_sux);
2497 }
2498
2499
2500 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2501 SwitchRangeList* res = new SwitchRangeList();
2502 int len = x->length();
2503 if (len > 0) {
2504 BlockBegin* sux = x->sux_at(0);
2505 int key = x->lo_key();
2506 BlockBegin* default_sux = x->default_sux();
2507 SwitchRange* range = new SwitchRange(key, sux);
2508 for (int i = 0; i < len; i++, key++) {
2509 BlockBegin* new_sux = x->sux_at(i);
2510 if (sux == new_sux) {
2511 // still in same range
2512 range->set_high_key(key);
2513 } else {
2514 // skip tests which explicitly dispatch to the default
2515 if (sux != default_sux) {
2516 res->append(range);
2517 }
2518 range = new SwitchRange(key, new_sux);
2519 }
2520 sux = new_sux;
2521 }
2522 if (res->length() == 0 || res->last() != range) res->append(range);
2523 }
2524 return res;
2525 }
2526
2527
2528 // we expect the keys to be sorted by increasing value
2529 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2530 SwitchRangeList* res = new SwitchRangeList();
2531 int len = x->length();
2532 if (len > 0) {
2533 BlockBegin* default_sux = x->default_sux();
2534 int key = x->key_at(0);
2535 BlockBegin* sux = x->sux_at(0);
2536 SwitchRange* range = new SwitchRange(key, sux);
2537 for (int i = 1; i < len; i++) {
2538 int new_key = x->key_at(i);
2539 BlockBegin* new_sux = x->sux_at(i);
2540 if (key+1 == new_key && sux == new_sux) {
2541 // still in same range
2542 range->set_high_key(new_key);
2543 } else {
2544 // skip tests which explicitly dispatch to the default
2545 if (range->sux() != default_sux) {
2546 res->append(range);
2547 }
2548 range = new SwitchRange(new_key, new_sux);
2549 }
2550 key = new_key;
2551 sux = new_sux;
2552 }
2553 if (res->length() == 0 || res->last() != range) res->append(range);
2554 }
2555 return res;
2556 }
2557
2558
2559 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2560 LIRItem tag(x->tag(), this);
2561 tag.load_item();
2562 set_no_result(x);
2563
2564 if (x->is_safepoint()) {
2565 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2566 }
2567
2568 // move values into phi locations
2569 move_to_phi(x->state());
2570
2571 int lo_key = x->lo_key();
2572 int hi_key = x->hi_key();
2573 int len = x->length();
2574 LIR_Opr value = tag.result();
2575 if (UseTableRanges) {
2576 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2577 } else {
2578 for (int i = 0; i < len; i++) {
2579 __ cmp(lir_cond_equal, value, i + lo_key);
2580 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2581 }
2582 __ jump(x->default_sux());
2583 }
2584 }
2585
2586
2587 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2588 LIRItem tag(x->tag(), this);
2589 tag.load_item();
2590 set_no_result(x);
2591
2592 if (x->is_safepoint()) {
2593 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2594 }
2595
2596 // move values into phi locations
2597 move_to_phi(x->state());
2598
2599 LIR_Opr value = tag.result();
2600 if (UseTableRanges) {
2601 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2602 } else {
2603 int len = x->length();
2604 for (int i = 0; i < len; i++) {
2605 __ cmp(lir_cond_equal, value, x->key_at(i));
2606 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2607 }
2608 __ jump(x->default_sux());
2609 }
2610 }
2611
2612
2613 void LIRGenerator::do_Goto(Goto* x) {
2614 set_no_result(x);
2615
2616 if (block()->next()->as_OsrEntry()) {
2617 // need to free up storage used for OSR entry point
2618 LIR_Opr osrBuffer = block()->next()->operand();
2619 BasicTypeList signature;
2620 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2621 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2622 __ move(osrBuffer, cc->args()->at(0));
2623 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2624 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2625 }
2626
2627 if (x->is_safepoint()) {
2628 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2629
2630 // increment backedge counter if needed
2631 CodeEmitInfo* info = state_for(x, state);
2632 increment_backedge_counter(info, x->profiled_bci());
2633 CodeEmitInfo* safepoint_info = state_for(x, state);
2634 __ safepoint(safepoint_poll_register(), safepoint_info);
2635 }
2636
2637 // Gotos can be folded Ifs, handle this case.
2638 if (x->should_profile()) {
2639 ciMethod* method = x->profiled_method();
2640 assert(method != NULL, "method should be set if branch is profiled");
2641 ciMethodData* md = method->method_data_or_null();
2642 assert(md != NULL, "Sanity");
2643 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2644 assert(data != NULL, "must have profiling data");
2645 int offset;
2646 if (x->direction() == Goto::taken) {
2647 assert(data->is_BranchData(), "need BranchData for two-way branches");
2648 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2649 } else if (x->direction() == Goto::not_taken) {
2650 assert(data->is_BranchData(), "need BranchData for two-way branches");
2651 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2652 } else {
2653 assert(data->is_JumpData(), "need JumpData for branches");
2654 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2655 }
2656 LIR_Opr md_reg = new_register(T_METADATA);
2657 __ metadata2reg(md->constant_encoding(), md_reg);
2658
2659 increment_counter(new LIR_Address(md_reg, offset,
2660 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2661 }
2662
2663 // emit phi-instruction move after safepoint since this simplifies
2664 // describing the state as the safepoint.
2665 move_to_phi(x->state());
2666
2667 __ jump(x->default_sux());
2668 }
2669
2670 /**
2671 * Emit profiling code if needed for arguments, parameters, return value types
2672 *
2673 * @param md MDO the code will update at runtime
2674 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2675 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2676 * @param profiled_k current profile
2677 * @param obj IR node for the object to be profiled
2678 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2679 * Set once we find an update to make and use for next ones.
2680 * @param not_null true if we know obj cannot be null
2681 * @param signature_at_call_k signature at call for obj
2682 * @param callee_signature_k signature of callee for obj
2683 * at call and callee signatures differ at method handle call
2684 * @return the only klass we know will ever be seen at this profile point
2685 */
2686 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2687 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2688 ciKlass* callee_signature_k) {
2689 ciKlass* result = NULL;
2690 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2691 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2692 // known not to be null or null bit already set and already set to
2693 // unknown: nothing we can do to improve profiling
2694 if (!do_null && !do_update) {
2695 return result;
2696 }
2697
2698 ciKlass* exact_klass = NULL;
2699 Compilation* comp = Compilation::current();
2700 if (do_update) {
2701 // try to find exact type, using CHA if possible, so that loading
2702 // the klass from the object can be avoided
2703 ciType* type = obj->exact_type();
2704 if (type == NULL) {
2705 type = obj->declared_type();
2706 type = comp->cha_exact_type(type);
2707 }
2708 assert(type == NULL || type->is_klass(), "type should be class");
2709 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL;
2710
2711 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2712 }
2713
2714 if (!do_null && !do_update) {
2715 return result;
2716 }
2717
2718 ciKlass* exact_signature_k = NULL;
2719 if (do_update) {
2720 // Is the type from the signature exact (the only one possible)?
2721 exact_signature_k = signature_at_call_k->exact_klass();
2722 if (exact_signature_k == NULL) {
2723 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2724 } else {
2725 result = exact_signature_k;
2726 // Known statically. No need to emit any code: prevent
2727 // LIR_Assembler::emit_profile_type() from emitting useless code
2728 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2729 }
2730 // exact_klass and exact_signature_k can be both non NULL but
2731 // different if exact_klass is loaded after the ciObject for
2732 // exact_signature_k is created.
2733 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) {
2734 // sometimes the type of the signature is better than the best type
2735 // the compiler has
2736 exact_klass = exact_signature_k;
2737 }
2738 if (callee_signature_k != NULL &&
2739 callee_signature_k != signature_at_call_k) {
2740 ciKlass* improved_klass = callee_signature_k->exact_klass();
2741 if (improved_klass == NULL) {
2742 improved_klass = comp->cha_exact_type(callee_signature_k);
2743 }
2744 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) {
2745 exact_klass = exact_signature_k;
2746 }
2747 }
2748 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2749 }
2750
2751 if (!do_null && !do_update) {
2752 return result;
2753 }
2754
2755 if (mdp == LIR_OprFact::illegalOpr) {
2756 mdp = new_register(T_METADATA);
2757 __ metadata2reg(md->constant_encoding(), mdp);
2758 if (md_base_offset != 0) {
2759 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2760 mdp = new_pointer_register();
2761 __ leal(LIR_OprFact::address(base_type_address), mdp);
2762 }
2763 }
2764 LIRItem value(obj, this);
2765 value.load_item();
2766 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2767 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
2768 return result;
2769 }
2770
2771 // profile parameters on entry to the root of the compilation
2772 void LIRGenerator::profile_parameters(Base* x) {
2773 if (compilation()->profile_parameters()) {
2774 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2775 ciMethodData* md = scope()->method()->method_data_or_null();
2776 assert(md != NULL, "Sanity");
2777
2778 if (md->parameters_type_data() != NULL) {
2779 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2780 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2781 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2782 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2783 LIR_Opr src = args->at(i);
2784 assert(!src->is_illegal(), "check");
2785 BasicType t = src->type();
2786 if (t == T_OBJECT || t == T_ARRAY) {
2787 intptr_t profiled_k = parameters->type(j);
2788 Local* local = x->state()->local_at(java_index)->as_Local();
2789 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2790 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2791 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
2792 // If the profile is known statically set it once for all and do not emit any code
2793 if (exact != NULL) {
2794 md->set_parameter_type(j, exact);
2795 }
2796 j++;
2797 }
2798 java_index += type2size[t];
2799 }
2800 }
2801 }
2802 }
2803
2804 void LIRGenerator::do_Base(Base* x) {
2805 __ std_entry(LIR_OprFact::illegalOpr);
2806 // Emit moves from physical registers / stack slots to virtual registers
2807 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2808 IRScope* irScope = compilation()->hir()->top_scope();
2809 int java_index = 0;
2810 for (int i = 0; i < args->length(); i++) {
2811 LIR_Opr src = args->at(i);
2812 assert(!src->is_illegal(), "check");
2813 BasicType t = src->type();
2814
2815 // Types which are smaller than int are passed as int, so
2816 // correct the type which passed.
2817 switch (t) {
2818 case T_BYTE:
2819 case T_BOOLEAN:
2820 case T_SHORT:
2821 case T_CHAR:
2822 t = T_INT;
2823 break;
2824 }
2825
2826 LIR_Opr dest = new_register(t);
2827 __ move(src, dest);
2828
2829 // Assign new location to Local instruction for this local
2830 Local* local = x->state()->local_at(java_index)->as_Local();
2831 assert(local != NULL, "Locals for incoming arguments must have been created");
2832 #ifndef __SOFTFP__
2833 // The java calling convention passes double as long and float as int.
2834 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2835 #endif // __SOFTFP__
2836 local->set_operand(dest);
2837 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
2838 java_index += type2size[t];
2839 }
2840
2841 if (compilation()->env()->dtrace_method_probes()) {
2842 BasicTypeList signature;
2843 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2844 signature.append(T_METADATA); // Method*
2845 LIR_OprList* args = new LIR_OprList();
2846 args->append(getThreadPointer());
2847 LIR_Opr meth = new_register(T_METADATA);
2848 __ metadata2reg(method()->constant_encoding(), meth);
2849 args->append(meth);
2850 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
2851 }
2852
2853 if (method()->is_synchronized()) {
2854 LIR_Opr obj;
2855 if (method()->is_static()) {
2856 obj = new_register(T_OBJECT);
2857 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2858 } else {
2859 Local* receiver = x->state()->local_at(0)->as_Local();
2860 assert(receiver != NULL, "must already exist");
2861 obj = receiver->operand();
2862 }
2863 assert(obj->is_valid(), "must be valid");
2864
2865 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2866 LIR_Opr lock = new_register(T_INT);
2867 __ load_stack_address_monitor(0, lock);
2868
2869 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException));
2870 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2871
2872 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
2873 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
2874 }
2875 }
2876
2877 // increment invocation counters if needed
2878 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2879 profile_parameters(x);
2880 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false);
2881 increment_invocation_counter(info);
2882 }
2883
2884 // all blocks with a successor must end with an unconditional jump
2885 // to the successor even if they are consecutive
2886 __ jump(x->default_sux());
2887 }
2888
2889
2890 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2891 // construct our frame and model the production of incoming pointer
2892 // to the OSR buffer.
2893 __ osr_entry(LIR_Assembler::osrBufferPointer());
2894 LIR_Opr result = rlock_result(x);
2895 __ move(LIR_Assembler::osrBufferPointer(), result);
2896 }
2897
2898
2899 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2900 assert(args->length() == arg_list->length(),
2901 err_msg_res("args=%d, arg_list=%d", args->length(), arg_list->length()));
2902 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2903 LIRItem* param = args->at(i);
2904 LIR_Opr loc = arg_list->at(i);
2905 if (loc->is_register()) {
2906 param->load_item_force(loc);
2907 } else {
2908 LIR_Address* addr = loc->as_address_ptr();
2909 param->load_for_store(addr->type());
2910 if (addr->type() == T_OBJECT) {
2911 __ move_wide(param->result(), addr);
2912 } else
2913 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
2914 __ unaligned_move(param->result(), addr);
2915 } else {
2916 __ move(param->result(), addr);
2917 }
2918 }
2919 }
2920
2921 if (x->has_receiver()) {
2922 LIRItem* receiver = args->at(0);
2923 LIR_Opr loc = arg_list->at(0);
2924 if (loc->is_register()) {
2925 receiver->load_item_force(loc);
2926 } else {
2927 assert(loc->is_address(), "just checking");
2928 receiver->load_for_store(T_OBJECT);
2929 __ move_wide(receiver->result(), loc->as_address_ptr());
2930 }
2931 }
2932 }
2933
2934
2935 // Visits all arguments, returns appropriate items without loading them
2936 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2937 LIRItemList* argument_items = new LIRItemList();
2938 if (x->has_receiver()) {
2939 LIRItem* receiver = new LIRItem(x->receiver(), this);
2940 argument_items->append(receiver);
2941 }
2942 for (int i = 0; i < x->number_of_arguments(); i++) {
2943 LIRItem* param = new LIRItem(x->argument_at(i), this);
2944 argument_items->append(param);
2945 }
2946 return argument_items;
2947 }
2948
2949
2950 // The invoke with receiver has following phases:
2951 // a) traverse and load/lock receiver;
2952 // b) traverse all arguments -> item-array (invoke_visit_argument)
2953 // c) push receiver on stack
2954 // d) load each of the items and push on stack
2955 // e) unlock receiver
2956 // f) move receiver into receiver-register %o0
2957 // g) lock result registers and emit call operation
2958 //
2959 // Before issuing a call, we must spill-save all values on stack
2960 // that are in caller-save register. "spill-save" moves those registers
2961 // either in a free callee-save register or spills them if no free
2962 // callee save register is available.
2963 //
2964 // The problem is where to invoke spill-save.
2965 // - if invoked between e) and f), we may lock callee save
2966 // register in "spill-save" that destroys the receiver register
2967 // before f) is executed
2968 // - if we rearrange f) to be earlier (by loading %o0) it
2969 // may destroy a value on the stack that is currently in %o0
2970 // and is waiting to be spilled
2971 // - if we keep the receiver locked while doing spill-save,
2972 // we cannot spill it as it is spill-locked
2973 //
2974 void LIRGenerator::do_Invoke(Invoke* x) {
2975 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2976
2977 LIR_OprList* arg_list = cc->args();
2978 LIRItemList* args = invoke_visit_arguments(x);
2979 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2980
2981 // setup result register
2982 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2983 if (x->type() != voidType) {
2984 result_register = result_register_for(x->type());
2985 }
2986
2987 CodeEmitInfo* info = state_for(x, x->state());
2988
2989 invoke_load_arguments(x, args, arg_list);
2990
2991 if (x->has_receiver()) {
2992 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2993 receiver = args->at(0)->result();
2994 }
2995
2996 // emit invoke code
2997 bool optimized = x->target_is_loaded() && x->target_is_final();
2998 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2999
3000 // JSR 292
3001 // Preserve the SP over MethodHandle call sites, if needed.
3002 ciMethod* target = x->target();
3003 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
3004 target->is_method_handle_intrinsic() ||
3005 target->is_compiled_lambda_form());
3006 if (is_method_handle_invoke) {
3007 info->set_is_method_handle_invoke(true);
3008 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
3009 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
3010 }
3011 }
3012
3013 switch (x->code()) {
3014 case Bytecodes::_invokestatic:
3015 __ call_static(target, result_register,
3016 SharedRuntime::get_resolve_static_call_stub(),
3017 arg_list, info);
3018 break;
3019 case Bytecodes::_invokespecial:
3020 case Bytecodes::_invokevirtual:
3021 case Bytecodes::_invokeinterface:
3022 // for final target we still produce an inline cache, in order
3023 // to be able to call mixed mode
3024 if (x->code() == Bytecodes::_invokespecial || optimized) {
3025 __ call_opt_virtual(target, receiver, result_register,
3026 SharedRuntime::get_resolve_opt_virtual_call_stub(),
3027 arg_list, info);
3028 } else if (x->vtable_index() < 0) {
3029 __ call_icvirtual(target, receiver, result_register,
3030 SharedRuntime::get_resolve_virtual_call_stub(),
3031 arg_list, info);
3032 } else {
3033 int entry_offset = InstanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size();
3034 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes();
3035 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info);
3036 }
3037 break;
3038 case Bytecodes::_invokedynamic: {
3039 __ call_dynamic(target, receiver, result_register,
3040 SharedRuntime::get_resolve_static_call_stub(),
3041 arg_list, info);
3042 break;
3043 }
3044 default:
3045 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(x->code())));
3046 break;
3047 }
3048
3049 // JSR 292
3050 // Restore the SP after MethodHandle call sites, if needed.
3051 if (is_method_handle_invoke
3052 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
3053 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
3054 }
3055
3056 if (x->type()->is_float() || x->type()->is_double()) {
3057 // Force rounding of results from non-strictfp when in strictfp
3058 // scope (or when we don't know the strictness of the callee, to
3059 // be safe.)
3060 if (method()->is_strict()) {
3061 if (!x->target_is_loaded() || !x->target_is_strictfp()) {
3062 result_register = round_item(result_register);
3063 }
3064 }
3065 }
3066
3067 if (result_register->is_valid()) {
3068 LIR_Opr result = rlock_result(x);
3069 __ move(result_register, result);
3070 }
3071 }
3072
3073
3074 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
3075 assert(x->number_of_arguments() == 1, "wrong type");
3076 LIRItem value (x->argument_at(0), this);
3077 LIR_Opr reg = rlock_result(x);
3078 value.load_item();
3079 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
3080 __ move(tmp, reg);
3081 }
3082
3083
3084
3085 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
3086 void LIRGenerator::do_IfOp(IfOp* x) {
3087 #ifdef ASSERT
3088 {
3089 ValueTag xtag = x->x()->type()->tag();
3090 ValueTag ttag = x->tval()->type()->tag();
3091 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
3092 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
3093 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
3094 }
3095 #endif
3096
3097 LIRItem left(x->x(), this);
3098 LIRItem right(x->y(), this);
3099 left.load_item();
3100 if (can_inline_as_constant(right.value())) {
3101 right.dont_load_item();
3102 } else {
3103 right.load_item();
3104 }
3105
3106 LIRItem t_val(x->tval(), this);
3107 LIRItem f_val(x->fval(), this);
3108 t_val.dont_load_item();
3109 f_val.dont_load_item();
3110 LIR_Opr reg = rlock_result(x);
3111
3112 __ cmp(lir_cond(x->cond()), left.result(), right.result());
3113 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
3114 }
3115
3116 void LIRGenerator::do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x) {
3117 assert(x->number_of_arguments() == expected_arguments, "wrong type");
3118 LIR_Opr reg = result_register_for(x->type());
3119 __ call_runtime_leaf(routine, getThreadTemp(),
3120 reg, new LIR_OprList());
3121 LIR_Opr result = rlock_result(x);
3122 __ move(reg, result);
3123 }
3124
3125 #ifdef TRACE_HAVE_INTRINSICS
3126 void LIRGenerator::do_ThreadIDIntrinsic(Intrinsic* x) {
3127 LIR_Opr thread = getThreadPointer();
3128 LIR_Opr osthread = new_pointer_register();
3129 __ move(new LIR_Address(thread, in_bytes(JavaThread::osthread_offset()), osthread->type()), osthread);
3130 size_t thread_id_size = OSThread::thread_id_size();
3131 if (thread_id_size == (size_t) BytesPerLong) {
3132 LIR_Opr id = new_register(T_LONG);
3133 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_LONG), id);
3134 __ convert(Bytecodes::_l2i, id, rlock_result(x));
3135 } else if (thread_id_size == (size_t) BytesPerInt) {
3136 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_INT), rlock_result(x));
3137 } else {
3138 ShouldNotReachHere();
3139 }
3140 }
3141
3142 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
3143 CodeEmitInfo* info = state_for(x);
3144 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check
3145 BasicType klass_pointer_type = NOT_LP64(T_INT) LP64_ONLY(T_LONG);
3146 assert(info != NULL, "must have info");
3147 LIRItem arg(x->argument_at(1), this);
3148 arg.load_item();
3149 LIR_Opr klass = new_pointer_register();
3150 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), klass_pointer_type), klass, info);
3151 LIR_Opr id = new_register(T_LONG);
3152 ByteSize offset = TRACE_ID_OFFSET;
3153 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG);
3154 __ move(trace_id_addr, id);
3155 __ logical_or(id, LIR_OprFact::longConst(0x01l), id);
3156 __ store(id, trace_id_addr);
3157 __ logical_and(id, LIR_OprFact::longConst(~0x3l), id);
3158 __ move(id, rlock_result(x));
3159 }
3160 #endif
3161
3162 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
3163 switch (x->id()) {
3164 case vmIntrinsics::_intBitsToFloat :
3165 case vmIntrinsics::_doubleToRawLongBits :
3166 case vmIntrinsics::_longBitsToDouble :
3167 case vmIntrinsics::_floatToRawIntBits : {
3168 do_FPIntrinsics(x);
3169 break;
3170 }
3171
3172 #ifdef TRACE_HAVE_INTRINSICS
3173 case vmIntrinsics::_threadID: do_ThreadIDIntrinsic(x); break;
3174 case vmIntrinsics::_classID: do_ClassIDIntrinsic(x); break;
3175 case vmIntrinsics::_counterTime:
3176 do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), 0, x);
3177 break;
3178 #endif
3179
3180 case vmIntrinsics::_currentTimeMillis:
3181 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), 0, x);
3182 break;
3183
3184 case vmIntrinsics::_nanoTime:
3185 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), 0, x);
3186 break;
3187
3188 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
3189 case vmIntrinsics::_isInstance: do_isInstance(x); break;
3190 case vmIntrinsics::_getClass: do_getClass(x); break;
3191 case vmIntrinsics::_currentThread: do_currentThread(x); break;
3192
3193 case vmIntrinsics::_dlog: // fall through
3194 case vmIntrinsics::_dlog10: // fall through
3195 case vmIntrinsics::_dabs: // fall through
3196 case vmIntrinsics::_dsqrt: // fall through
3197 case vmIntrinsics::_dtan: // fall through
3198 case vmIntrinsics::_dsin : // fall through
3199 case vmIntrinsics::_dcos : // fall through
3200 case vmIntrinsics::_dexp : // fall through
3201 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
3202 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
3203
3204 // java.nio.Buffer.checkIndex
3205 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
3206
3207 case vmIntrinsics::_compareAndSwapObject:
3208 do_CompareAndSwap(x, objectType);
3209 break;
3210 case vmIntrinsics::_compareAndSwapInt:
3211 do_CompareAndSwap(x, intType);
3212 break;
3213 case vmIntrinsics::_compareAndSwapLong:
3214 do_CompareAndSwap(x, longType);
3215 break;
3216
3217 case vmIntrinsics::_loadFence :
3218 if (os::is_MP()) __ membar_acquire();
3219 break;
3220 case vmIntrinsics::_storeFence:
3221 if (os::is_MP()) __ membar_release();
3222 break;
3223 case vmIntrinsics::_fullFence :
3224 if (os::is_MP()) __ membar();
3225 break;
3226
3227 case vmIntrinsics::_Reference_get:
3228 do_Reference_get(x);
3229 break;
3230
3231 case vmIntrinsics::_updateCRC32:
3232 case vmIntrinsics::_updateBytesCRC32:
3233 case vmIntrinsics::_updateByteBufferCRC32:
3234 do_update_CRC32(x);
3235 break;
3236
3237 default: ShouldNotReachHere(); break;
3238 }
3239 }
3240
3241 void LIRGenerator::profile_arguments(ProfileCall* x) {
3242 if (compilation()->profile_arguments()) {
3243 int bci = x->bci_of_invoke();
3244 ciMethodData* md = x->method()->method_data_or_null();
3245 ciProfileData* data = md->bci_to_data(bci);
3246 if (data != NULL) {
3247 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3248 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3249 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3250 int base_offset = md->byte_offset_of_slot(data, extra);
3251 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3252 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3253
3254 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3255 int start = 0;
3256 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3257 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3258 // first argument is not profiled at call (method handle invoke)
3259 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3260 start = 1;
3261 }
3262 ciSignature* callee_signature = x->callee()->signature();
3263 // method handle call to virtual method
3264 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3265 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
3266
3267 bool ignored_will_link;
3268 ciSignature* signature_at_call = NULL;
3269 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3270 ciSignatureStream signature_at_call_stream(signature_at_call);
3271
3272 // if called through method handle invoke, some arguments may have been popped
3273 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3274 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3275 ciKlass* exact = profile_type(md, base_offset, off,
3276 args->type(i), x->profiled_arg_at(i+start), mdp,
3277 !x->arg_needs_null_check(i+start),
3278 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3279 if (exact != NULL) {
3280 md->set_argument_type(bci, i, exact);
3281 }
3282 }
3283 } else {
3284 #ifdef ASSERT
3285 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3286 int n = x->nb_profiled_args();
3287 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3288 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3289 "only at JSR292 bytecodes");
3290 #endif
3291 }
3292 }
3293 }
3294 }
3295
3296 // profile parameters on entry to an inlined method
3297 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3298 if (compilation()->profile_parameters() && x->inlined()) {
3299 ciMethodData* md = x->callee()->method_data_or_null();
3300 if (md != NULL) {
3301 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3302 if (parameters_type_data != NULL) {
3303 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3304 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3305 bool has_receiver = !x->callee()->is_static();
3306 ciSignature* sig = x->callee()->signature();
3307 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
3308 int i = 0; // to iterate on the Instructions
3309 Value arg = x->recv();
3310 bool not_null = false;
3311 int bci = x->bci_of_invoke();
3312 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3313 // The first parameter is the receiver so that's what we start
3314 // with if it exists. One exception is method handle call to
3315 // virtual method: the receiver is in the args list
3316 if (arg == NULL || !Bytecodes::has_receiver(bc)) {
3317 i = 1;
3318 arg = x->profiled_arg_at(0);
3319 not_null = !x->arg_needs_null_check(0);
3320 }
3321 int k = 0; // to iterate on the profile data
3322 for (;;) {
3323 intptr_t profiled_k = parameters->type(k);
3324 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3325 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3326 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
3327 // If the profile is known statically set it once for all and do not emit any code
3328 if (exact != NULL) {
3329 md->set_parameter_type(k, exact);
3330 }
3331 k++;
3332 if (k >= parameters_type_data->number_of_parameters()) {
3333 #ifdef ASSERT
3334 int extra = 0;
3335 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3336 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3337 x->recv() != NULL && Bytecodes::has_receiver(bc)) {
3338 extra += 1;
3339 }
3340 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3341 #endif
3342 break;
3343 }
3344 arg = x->profiled_arg_at(i);
3345 not_null = !x->arg_needs_null_check(i);
3346 i++;
3347 }
3348 }
3349 }
3350 }
3351 }
3352
3353 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3354 // Need recv in a temporary register so it interferes with the other temporaries
3355 LIR_Opr recv = LIR_OprFact::illegalOpr;
3356 LIR_Opr mdo = new_register(T_OBJECT);
3357 // tmp is used to hold the counters on SPARC
3358 LIR_Opr tmp = new_pointer_register();
3359
3360 if (x->nb_profiled_args() > 0) {
3361 profile_arguments(x);
3362 }
3363
3364 // profile parameters on inlined method entry including receiver
3365 if (x->recv() != NULL || x->nb_profiled_args() > 0) {
3366 profile_parameters_at_call(x);
3367 }
3368
3369 if (x->recv() != NULL) {
3370 LIRItem value(x->recv(), this);
3371 value.load_item();
3372 recv = new_register(T_OBJECT);
3373 __ move(value.result(), recv);
3374 }
3375 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3376 }
3377
3378 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
3379 int bci = x->bci_of_invoke();
3380 ciMethodData* md = x->method()->method_data_or_null();
3381 ciProfileData* data = md->bci_to_data(bci);
3382 if (data != NULL) {
3383 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3384 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3385 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3386
3387 bool ignored_will_link;
3388 ciSignature* signature_at_call = NULL;
3389 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3390
3391 // The offset within the MDO of the entry to update may be too large
3392 // to be used in load/store instructions on some platforms. So have
3393 // profile_type() compute the address of the profile in a register.
3394 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3395 ret->type(), x->ret(), mdp,
3396 !x->needs_null_check(),
3397 signature_at_call->return_type()->as_klass(),
3398 x->callee()->signature()->return_type()->as_klass());
3399 if (exact != NULL) {
3400 md->set_return_type(bci, exact);
3401 }
3402 }
3403 }
3404
3405 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3406 // We can safely ignore accessors here, since c2 will inline them anyway,
3407 // accessors are also always mature.
3408 if (!x->inlinee()->is_accessor()) {
3409 CodeEmitInfo* info = state_for(x, x->state(), true);
3410 // Notify the runtime very infrequently only to take care of counter overflows
3411 increment_event_counter_impl(info, x->inlinee(), (1 << Tier23InlineeNotifyFreqLog) - 1, InvocationEntryBci, false, true);
3412 }
3413 }
3414
3415 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) {
3416 int freq_log = 0;
3417 int level = compilation()->env()->comp_level();
3418 if (level == CompLevel_limited_profile) {
3419 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3420 } else if (level == CompLevel_full_profile) {
3421 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3422 } else {
3423 ShouldNotReachHere();
3424 }
3425 // Increment the appropriate invocation/backedge counter and notify the runtime.
3426 increment_event_counter_impl(info, info->scope()->method(), (1 << freq_log) - 1, bci, backedge, true);
3427 }
3428
3429 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3430 ciMethod *method, int frequency,
3431 int bci, bool backedge, bool notify) {
3432 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3433 int level = _compilation->env()->comp_level();
3434 assert(level > CompLevel_simple, "Shouldn't be here");
3435
3436 int offset = -1;
3437 LIR_Opr counter_holder = NULL;
3438 if (level == CompLevel_limited_profile) {
3439 MethodCounters* counters_adr = method->ensure_method_counters();
3440 if (counters_adr == NULL) {
3441 bailout("method counters allocation failed");
3442 return;
3443 }
3444 counter_holder = new_pointer_register();
3445 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3446 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3447 MethodCounters::invocation_counter_offset());
3448 } else if (level == CompLevel_full_profile) {
3449 counter_holder = new_register(T_METADATA);
3450 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3451 MethodData::invocation_counter_offset());
3452 ciMethodData* md = method->method_data_or_null();
3453 assert(md != NULL, "Sanity");
3454 __ metadata2reg(md->constant_encoding(), counter_holder);
3455 } else {
3456 ShouldNotReachHere();
3457 }
3458 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3459 LIR_Opr result = new_register(T_INT);
3460 __ load(counter, result);
3461 __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result);
3462 __ store(result, counter);
3463 if (notify) {
3464 LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT);
3465 LIR_Opr meth = new_register(T_METADATA);
3466 __ metadata2reg(method->constant_encoding(), meth);
3467 __ logical_and(result, mask, result);
3468 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3469 // The bci for info can point to cmp for if's we want the if bci
3470 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3471 __ branch(lir_cond_equal, T_INT, overflow);
3472 __ branch_destination(overflow->continuation());
3473 }
3474 }
3475
3476 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3477 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3478 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3479
3480 if (x->pass_thread()) {
3481 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3482 args->append(getThreadPointer());
3483 }
3484
3485 for (int i = 0; i < x->number_of_arguments(); i++) {
3486 Value a = x->argument_at(i);
3487 LIRItem* item = new LIRItem(a, this);
3488 item->load_item();
3489 args->append(item->result());
3490 signature->append(as_BasicType(a->type()));
3491 }
3492
3493 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL);
3494 if (x->type() == voidType) {
3495 set_no_result(x);
3496 } else {
3497 __ move(result, rlock_result(x));
3498 }
3499 }
3500
3501 #ifdef ASSERT
3502 void LIRGenerator::do_Assert(Assert *x) {
3503 ValueTag tag = x->x()->type()->tag();
3504 If::Condition cond = x->cond();
3505
3506 LIRItem xitem(x->x(), this);
3507 LIRItem yitem(x->y(), this);
3508 LIRItem* xin = &xitem;
3509 LIRItem* yin = &yitem;
3510
3511 assert(tag == intTag, "Only integer assertions are valid!");
3512
3513 xin->load_item();
3514 yin->dont_load_item();
3515
3516 set_no_result(x);
3517
3518 LIR_Opr left = xin->result();
3519 LIR_Opr right = yin->result();
3520
3521 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3522 }
3523 #endif
3524
3525 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3526
3527
3528 Instruction *a = x->x();
3529 Instruction *b = x->y();
3530 if (!a || StressRangeCheckElimination) {
3531 assert(!b || StressRangeCheckElimination, "B must also be null");
3532
3533 CodeEmitInfo *info = state_for(x, x->state());
3534 CodeStub* stub = new PredicateFailedStub(info);
3535
3536 __ jump(stub);
3537 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3538 int a_int = a->type()->as_IntConstant()->value();
3539 int b_int = b->type()->as_IntConstant()->value();
3540
3541 bool ok = false;
3542
3543 switch(x->cond()) {
3544 case Instruction::eql: ok = (a_int == b_int); break;
3545 case Instruction::neq: ok = (a_int != b_int); break;
3546 case Instruction::lss: ok = (a_int < b_int); break;
3547 case Instruction::leq: ok = (a_int <= b_int); break;
3548 case Instruction::gtr: ok = (a_int > b_int); break;
3549 case Instruction::geq: ok = (a_int >= b_int); break;
3550 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3551 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3552 default: ShouldNotReachHere();
3553 }
3554
3555 if (ok) {
3556
3557 CodeEmitInfo *info = state_for(x, x->state());
3558 CodeStub* stub = new PredicateFailedStub(info);
3559
3560 __ jump(stub);
3561 }
3562 } else {
3563
3564 ValueTag tag = x->x()->type()->tag();
3565 If::Condition cond = x->cond();
3566 LIRItem xitem(x->x(), this);
3567 LIRItem yitem(x->y(), this);
3568 LIRItem* xin = &xitem;
3569 LIRItem* yin = &yitem;
3570
3571 assert(tag == intTag, "Only integer deoptimizations are valid!");
3572
3573 xin->load_item();
3574 yin->dont_load_item();
3575 set_no_result(x);
3576
3577 LIR_Opr left = xin->result();
3578 LIR_Opr right = yin->result();
3579
3580 CodeEmitInfo *info = state_for(x, x->state());
3581 CodeStub* stub = new PredicateFailedStub(info);
3582
3583 __ cmp(lir_cond(cond), left, right);
3584 __ branch(lir_cond(cond), right->type(), stub);
3585 }
3586 }
3587
3588
3589 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3590 LIRItemList args(1);
3591 LIRItem value(arg1, this);
3592 args.append(&value);
3593 BasicTypeList signature;
3594 signature.append(as_BasicType(arg1->type()));
3595
3596 return call_runtime(&signature, &args, entry, result_type, info);
3597 }
3598
3599
3600 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3601 LIRItemList args(2);
3602 LIRItem value1(arg1, this);
3603 LIRItem value2(arg2, this);
3604 args.append(&value1);
3605 args.append(&value2);
3606 BasicTypeList signature;
3607 signature.append(as_BasicType(arg1->type()));
3608 signature.append(as_BasicType(arg2->type()));
3609
3610 return call_runtime(&signature, &args, entry, result_type, info);
3611 }
3612
3613
3614 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3615 address entry, ValueType* result_type, CodeEmitInfo* info) {
3616 // get a result register
3617 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3618 LIR_Opr result = LIR_OprFact::illegalOpr;
3619 if (result_type->tag() != voidTag) {
3620 result = new_register(result_type);
3621 phys_reg = result_register_for(result_type);
3622 }
3623
3624 // move the arguments into the correct location
3625 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3626 assert(cc->length() == args->length(), "argument mismatch");
3627 for (int i = 0; i < args->length(); i++) {
3628 LIR_Opr arg = args->at(i);
3629 LIR_Opr loc = cc->at(i);
3630 if (loc->is_register()) {
3631 __ move(arg, loc);
3632 } else {
3633 LIR_Address* addr = loc->as_address_ptr();
3634 // if (!can_store_as_constant(arg)) {
3635 // LIR_Opr tmp = new_register(arg->type());
3636 // __ move(arg, tmp);
3637 // arg = tmp;
3638 // }
3639 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3640 __ unaligned_move(arg, addr);
3641 } else {
3642 __ move(arg, addr);
3643 }
3644 }
3645 }
3646
3647 if (info) {
3648 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3649 } else {
3650 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3651 }
3652 if (result->is_valid()) {
3653 __ move(phys_reg, result);
3654 }
3655 return result;
3656 }
3657
3658
3659 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3660 address entry, ValueType* result_type, CodeEmitInfo* info) {
3661 // get a result register
3662 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3663 LIR_Opr result = LIR_OprFact::illegalOpr;
3664 if (result_type->tag() != voidTag) {
3665 result = new_register(result_type);
3666 phys_reg = result_register_for(result_type);
3667 }
3668
3669 // move the arguments into the correct location
3670 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3671
3672 assert(cc->length() == args->length(), "argument mismatch");
3673 for (int i = 0; i < args->length(); i++) {
3674 LIRItem* arg = args->at(i);
3675 LIR_Opr loc = cc->at(i);
3676 if (loc->is_register()) {
3677 arg->load_item_force(loc);
3678 } else {
3679 LIR_Address* addr = loc->as_address_ptr();
3680 arg->load_for_store(addr->type());
3681 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3682 __ unaligned_move(arg->result(), addr);
3683 } else {
3684 __ move(arg->result(), addr);
3685 }
3686 }
3687 }
3688
3689 if (info) {
3690 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3691 } else {
3692 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3693 }
3694 if (result->is_valid()) {
3695 __ move(phys_reg, result);
3696 }
3697 return result;
3698 }
3699
3700 void LIRGenerator::do_MemBar(MemBar* x) {
3701 if (os::is_MP()) {
3702 LIR_Code code = x->code();
3703 switch(code) {
3704 case lir_membar_acquire : __ membar_acquire(); break;
3705 case lir_membar_release : __ membar_release(); break;
3706 case lir_membar : __ membar(); break;
3707 case lir_membar_loadload : __ membar_loadload(); break;
3708 case lir_membar_storestore: __ membar_storestore(); break;
3709 case lir_membar_loadstore : __ membar_loadstore(); break;
3710 case lir_membar_storeload : __ membar_storeload(); break;
3711 default : ShouldNotReachHere(); break;
3712 }
3713 }
3714 }
3715
3716 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3717 if (x->check_boolean()) {
3718 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3719 if (TwoOperandLIRForm) {
3720 __ move(value, value_fixed);
3721 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3722 } else {
3723 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3724 }
3725 LIR_Opr klass = new_register(T_METADATA);
3726 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
3727 null_check_info = NULL;
3728 LIR_Opr layout = new_register(T_INT);
3729 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3730 int diffbit = Klass::layout_helper_boolean_diffbit();
3731 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3732 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3733 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3734 value = value_fixed;
3735 }
3736 return value;
3737 }