1 /*
2 * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_Instruction.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_LIRGenerator.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "ci/ciObjArray.hpp"
36 #include "ci/ciUtilities.hpp"
37 #include "gc/shared/barrierSet.hpp"
38 #include "gc/shared/c1/barrierSetC1.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "runtime/vm_version.hpp"
43 #include "utilities/bitMap.inline.hpp"
44 #include "utilities/macros.hpp"
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().at(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().at(i);
161 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
162 emit_move(node->operand(), node->destination_at(j)->operand());
163 }
164 }
165 }
166
167
168 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
169 ResolveNode* node;
170 if (opr->is_virtual()) {
171 int vreg_num = opr->vreg_number();
172 node = vreg_table().at_grow(vreg_num, NULL);
173 assert(node == NULL || node->operand() == opr, "");
174 if (node == NULL) {
175 node = new ResolveNode(opr);
176 vreg_table().at_put(vreg_num, node);
177 }
178 // Make sure that all virtual operands show up in the list when
179 // they are used as the source of a move.
180 if (source && !virtual_operands().contains(node)) {
181 virtual_operands().append(node);
182 }
183 } else {
184 assert(source, "");
185 node = new ResolveNode(opr);
186 other_operands().append(node);
187 }
188 return node;
189 }
190
191
192 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
193 assert(dest->is_virtual(), "");
194 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
195 assert(src->is_valid(), "");
196 assert(dest->is_valid(), "");
197 ResolveNode* source = source_node(src);
198 source->append(destination_node(dest));
199 }
200
201
202 //--------------------------------------------------------------
203 // LIRItem
204
205 void LIRItem::set_result(LIR_Opr opr) {
206 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
207 value()->set_operand(opr);
208
209 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::block_do_prolog(BlockBegin* block) {
309 #ifndef PRODUCT
310 if (PrintIRWithLIR) {
311 block->print();
312 }
313 #endif
314
315 // set up the list of LIR instructions
316 assert(block->lir() == NULL, "LIR list already computed for this block");
317 _lir = new LIR_List(compilation(), block);
318 block->set_lir(_lir);
319
320 __ branch_destination(block->label());
321
322 if (LIRTraceExecution &&
323 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
324 !block->is_set(BlockBegin::exception_entry_flag)) {
325 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
326 trace_block_entry(block);
327 }
328 }
329
330
331 void LIRGenerator::block_do_epilog(BlockBegin* block) {
332 #ifndef PRODUCT
333 if (PrintIRWithLIR) {
334 tty->cr();
335 }
336 #endif
337
338 // LIR_Opr for unpinned constants shouldn't be referenced by other
339 // blocks so clear them out after processing the block.
340 for (int i = 0; i < _unpinned_constants.length(); i++) {
341 _unpinned_constants.at(i)->clear_operand();
342 }
343 _unpinned_constants.trunc_to(0);
344
345 // clear our any registers for other local constants
346 _constants.trunc_to(0);
347 _reg_for_constants.trunc_to(0);
348 }
349
350
351 void LIRGenerator::block_do(BlockBegin* block) {
352 CHECK_BAILOUT();
353
354 block_do_prolog(block);
355 set_block(block);
356
357 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
358 if (instr->is_pinned()) do_root(instr);
359 }
360
361 set_block(NULL);
362 block_do_epilog(block);
363 }
364
365
366 //-------------------------LIRGenerator-----------------------------
367
368 // This is where the tree-walk starts; instr must be root;
369 void LIRGenerator::do_root(Value instr) {
370 CHECK_BAILOUT();
371
372 InstructionMark im(compilation(), instr);
373
374 assert(instr->is_pinned(), "use only with roots");
375 assert(instr->subst() == instr, "shouldn't have missed substitution");
376
377 instr->visit(this);
378
379 assert(!instr->has_uses() || instr->operand()->is_valid() ||
380 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
381 }
382
383
384 // This is called for each node in tree; the walk stops if a root is reached
385 void LIRGenerator::walk(Value instr) {
386 InstructionMark im(compilation(), instr);
387 //stop walk when encounter a root
388 if ((instr->is_pinned() && instr->as_Phi() == NULL) || instr->operand()->is_valid()) {
389 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
390 } else {
391 assert(instr->subst() == instr, "shouldn't have missed substitution");
392 instr->visit(this);
393 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
394 }
395 }
396
397
398 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
399 assert(state != NULL, "state must be defined");
400
401 #ifndef PRODUCT
402 state->verify();
403 #endif
404
405 ValueStack* s = state;
406 for_each_state(s) {
407 if (s->kind() == ValueStack::EmptyExceptionState) {
408 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty");
409 continue;
410 }
411
412 int index;
413 Value value;
414 for_each_stack_value(s, index, value) {
415 assert(value->subst() == value, "missed substitution");
416 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
417 walk(value);
418 assert(value->operand()->is_valid(), "must be evaluated now");
419 }
420 }
421
422 int bci = s->bci();
423 IRScope* scope = s->scope();
424 ciMethod* method = scope->method();
425
426 MethodLivenessResult liveness = method->liveness_at_bci(bci);
427 if (bci == SynchronizationEntryBCI) {
428 if (x->as_ExceptionObject() || x->as_Throw()) {
429 // all locals are dead on exit from the synthetic unlocker
430 liveness.clear();
431 } else {
432 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
433 }
434 }
435 if (!liveness.is_valid()) {
436 // Degenerate or breakpointed method.
437 bailout("Degenerate or breakpointed method");
438 } else {
439 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
440 for_each_local_value(s, index, value) {
441 assert(value->subst() == value, "missed substition");
442 if (liveness.at(index) && !value->type()->is_illegal()) {
443 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
444 walk(value);
445 assert(value->operand()->is_valid(), "must be evaluated now");
446 }
447 } else {
448 // NULL out this local so that linear scan can assume that all non-NULL values are live.
449 s->invalidate_local(index);
450 }
451 }
452 }
453 }
454
455 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
456 }
457
458
459 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
460 return state_for(x, x->exception_state());
461 }
462
463
464 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
465 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation
466 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
467 * the class. */
468 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) {
469 assert(info != NULL, "info must be set if class is not loaded");
470 __ klass2reg_patch(NULL, r, info);
471 } else {
472 // no patching needed
473 __ metadata2reg(obj->constant_encoding(), r);
474 }
475 }
476
477
478 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
479 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
480 CodeStub* stub = new RangeCheckStub(range_check_info, index, array);
481 if (index->is_constant()) {
482 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
483 index->as_jint(), null_check_info);
484 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
485 } else {
486 cmp_reg_mem(lir_cond_aboveEqual, index, array,
487 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
488 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
489 }
490 }
491
492
493 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
494 CodeStub* stub = new RangeCheckStub(info, index);
495 if (index->is_constant()) {
496 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
497 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
498 } else {
499 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
500 java_nio_Buffer::limit_offset(), T_INT, info);
501 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
502 }
503 __ move(index, result);
504 }
505
506
507
508 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) {
509 LIR_Opr result_op = result;
510 LIR_Opr left_op = left;
511 LIR_Opr right_op = right;
512
513 if (TwoOperandLIRForm && left_op != result_op) {
514 assert(right_op != result_op, "malformed");
515 __ move(left_op, result_op);
516 left_op = result_op;
517 }
518
519 switch(code) {
520 case Bytecodes::_dadd:
521 case Bytecodes::_fadd:
522 case Bytecodes::_ladd:
523 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
524 case Bytecodes::_fmul:
525 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
526
527 case Bytecodes::_dmul:
528 {
529 if (is_strictfp) {
530 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break;
531 } else {
532 __ mul(left_op, right_op, result_op); break;
533 }
534 }
535 break;
536
537 case Bytecodes::_imul:
538 {
539 bool did_strength_reduce = false;
540
541 if (right->is_constant()) {
542 jint c = right->as_jint();
543 if (c > 0 && is_power_of_2(c)) {
544 // do not need tmp here
545 __ shift_left(left_op, exact_log2(c), result_op);
546 did_strength_reduce = true;
547 } else {
548 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
549 }
550 }
551 // we couldn't strength reduce so just emit the multiply
552 if (!did_strength_reduce) {
553 __ mul(left_op, right_op, result_op);
554 }
555 }
556 break;
557
558 case Bytecodes::_dsub:
559 case Bytecodes::_fsub:
560 case Bytecodes::_lsub:
561 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
562
563 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
564 // ldiv and lrem are implemented with a direct runtime call
565
566 case Bytecodes::_ddiv:
567 {
568 if (is_strictfp) {
569 __ div_strictfp (left_op, right_op, result_op, tmp_op); break;
570 } else {
571 __ div (left_op, right_op, result_op); break;
572 }
573 }
574 break;
575
576 case Bytecodes::_drem:
577 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
578
579 default: ShouldNotReachHere();
580 }
581 }
582
583
584 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
585 arithmetic_op(code, result, left, right, false, tmp);
586 }
587
588
589 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
590 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info);
591 }
592
593
594 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) {
595 arithmetic_op(code, result, left, right, is_strictfp, tmp);
596 }
597
598
599 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
600
601 if (TwoOperandLIRForm && value != result_op
602 // Only 32bit right shifts require two operand form on S390.
603 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) {
604 assert(count != result_op, "malformed");
605 __ move(value, result_op);
606 value = result_op;
607 }
608
609 assert(count->is_constant() || count->is_register(), "must be");
610 switch(code) {
611 case Bytecodes::_ishl:
612 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
613 case Bytecodes::_ishr:
614 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
615 case Bytecodes::_iushr:
616 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
617 default: ShouldNotReachHere();
618 }
619 }
620
621
622 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
623 if (TwoOperandLIRForm && left_op != result_op) {
624 assert(right_op != result_op, "malformed");
625 __ move(left_op, result_op);
626 left_op = result_op;
627 }
628
629 switch(code) {
630 case Bytecodes::_iand:
631 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
632
633 case Bytecodes::_ior:
634 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
635
636 case Bytecodes::_ixor:
637 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
638
639 default: ShouldNotReachHere();
640 }
641 }
642
643
644 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) {
645 if (!GenerateSynchronizationCode) return;
646 // for slow path, use debug info for state after successful locking
647 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
648 __ load_stack_address_monitor(monitor_no, lock);
649 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
650 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
651 }
652
653
654 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
655 if (!GenerateSynchronizationCode) return;
656 // setup registers
657 LIR_Opr hdr = lock;
658 lock = new_hdr;
659 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no);
660 __ load_stack_address_monitor(monitor_no, lock);
661 __ unlock_object(hdr, object, lock, scratch, slow_path);
662 }
663
664 #ifndef PRODUCT
665 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
666 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
667 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
668 } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) {
669 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
670 }
671 }
672 #endif
673
674 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) {
675 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
676 // If klass is not loaded we do not know if the klass has finalizers:
677 if (UseFastNewInstance && klass->is_loaded()
678 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
679
680 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
681
682 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
683
684 assert(klass->is_loaded(), "must be loaded");
685 // allocate space for instance
686 assert(klass->size_helper() >= 0, "illegal instance size");
687 const int instance_size = align_object_size(klass->size_helper());
688 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
689 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
690 } else {
691 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
692 __ branch(lir_cond_always, T_ILLEGAL, slow_path);
693 __ branch_destination(slow_path->continuation());
694 }
695 }
696
697
698 static bool is_constant_zero(Instruction* inst) {
699 IntConstant* c = inst->type()->as_IntConstant();
700 if (c) {
701 return (c->value() == 0);
702 }
703 return false;
704 }
705
706
707 static bool positive_constant(Instruction* inst) {
708 IntConstant* c = inst->type()->as_IntConstant();
709 if (c) {
710 return (c->value() >= 0);
711 }
712 return false;
713 }
714
715
716 static ciArrayKlass* as_array_klass(ciType* type) {
717 if (type != NULL && type->is_array_klass() && type->is_loaded()) {
718 return (ciArrayKlass*)type;
719 } else {
720 return NULL;
721 }
722 }
723
724 static ciType* phi_declared_type(Phi* phi) {
725 ciType* t = phi->operand_at(0)->declared_type();
726 if (t == NULL) {
727 return NULL;
728 }
729 for(int i = 1; i < phi->operand_count(); i++) {
730 if (t != phi->operand_at(i)->declared_type()) {
731 return NULL;
732 }
733 }
734 return t;
735 }
736
737 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
738 Instruction* src = x->argument_at(0);
739 Instruction* src_pos = x->argument_at(1);
740 Instruction* dst = x->argument_at(2);
741 Instruction* dst_pos = x->argument_at(3);
742 Instruction* length = x->argument_at(4);
743
744 // first try to identify the likely type of the arrays involved
745 ciArrayKlass* expected_type = NULL;
746 bool is_exact = false, src_objarray = false, dst_objarray = false;
747 {
748 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
749 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
750 Phi* phi;
751 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) {
752 src_declared_type = as_array_klass(phi_declared_type(phi));
753 }
754 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
755 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
756 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) {
757 dst_declared_type = as_array_klass(phi_declared_type(phi));
758 }
759
760 if (src_exact_type != NULL && src_exact_type == dst_exact_type) {
761 // the types exactly match so the type is fully known
762 is_exact = true;
763 expected_type = src_exact_type;
764 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) {
765 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
766 ciArrayKlass* src_type = NULL;
767 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) {
768 src_type = (ciArrayKlass*) src_exact_type;
769 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) {
770 src_type = (ciArrayKlass*) src_declared_type;
771 }
772 if (src_type != NULL) {
773 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
774 is_exact = true;
775 expected_type = dst_type;
776 }
777 }
778 }
779 // at least pass along a good guess
780 if (expected_type == NULL) expected_type = dst_exact_type;
781 if (expected_type == NULL) expected_type = src_declared_type;
782 if (expected_type == NULL) expected_type = dst_declared_type;
783
784 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
785 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
786 }
787
788 // if a probable array type has been identified, figure out if any
789 // of the required checks for a fast case can be elided.
790 int flags = LIR_OpArrayCopy::all_flags;
791
792 if (!src_objarray)
793 flags &= ~LIR_OpArrayCopy::src_objarray;
794 if (!dst_objarray)
795 flags &= ~LIR_OpArrayCopy::dst_objarray;
796
797 if (!x->arg_needs_null_check(0))
798 flags &= ~LIR_OpArrayCopy::src_null_check;
799 if (!x->arg_needs_null_check(2))
800 flags &= ~LIR_OpArrayCopy::dst_null_check;
801
802
803 if (expected_type != NULL) {
804 Value length_limit = NULL;
805
806 IfOp* ifop = length->as_IfOp();
807 if (ifop != NULL) {
808 // look for expressions like min(v, a.length) which ends up as
809 // x > y ? y : x or x >= y ? y : x
810 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
811 ifop->x() == ifop->fval() &&
812 ifop->y() == ifop->tval()) {
813 length_limit = ifop->y();
814 }
815 }
816
817 // try to skip null checks and range checks
818 NewArray* src_array = src->as_NewArray();
819 if (src_array != NULL) {
820 flags &= ~LIR_OpArrayCopy::src_null_check;
821 if (length_limit != NULL &&
822 src_array->length() == length_limit &&
823 is_constant_zero(src_pos)) {
824 flags &= ~LIR_OpArrayCopy::src_range_check;
825 }
826 }
827
828 NewArray* dst_array = dst->as_NewArray();
829 if (dst_array != NULL) {
830 flags &= ~LIR_OpArrayCopy::dst_null_check;
831 if (length_limit != NULL &&
832 dst_array->length() == length_limit &&
833 is_constant_zero(dst_pos)) {
834 flags &= ~LIR_OpArrayCopy::dst_range_check;
835 }
836 }
837
838 // check from incoming constant values
839 if (positive_constant(src_pos))
840 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
841 if (positive_constant(dst_pos))
842 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
843 if (positive_constant(length))
844 flags &= ~LIR_OpArrayCopy::length_positive_check;
845
846 // see if the range check can be elided, which might also imply
847 // that src or dst is non-null.
848 ArrayLength* al = length->as_ArrayLength();
849 if (al != NULL) {
850 if (al->array() == src) {
851 // it's the length of the source array
852 flags &= ~LIR_OpArrayCopy::length_positive_check;
853 flags &= ~LIR_OpArrayCopy::src_null_check;
854 if (is_constant_zero(src_pos))
855 flags &= ~LIR_OpArrayCopy::src_range_check;
856 }
857 if (al->array() == dst) {
858 // it's the length of the destination array
859 flags &= ~LIR_OpArrayCopy::length_positive_check;
860 flags &= ~LIR_OpArrayCopy::dst_null_check;
861 if (is_constant_zero(dst_pos))
862 flags &= ~LIR_OpArrayCopy::dst_range_check;
863 }
864 }
865 if (is_exact) {
866 flags &= ~LIR_OpArrayCopy::type_check;
867 }
868 }
869
870 IntConstant* src_int = src_pos->type()->as_IntConstant();
871 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
872 if (src_int && dst_int) {
873 int s_offs = src_int->value();
874 int d_offs = dst_int->value();
875 if (src_int->value() >= dst_int->value()) {
876 flags &= ~LIR_OpArrayCopy::overlapping;
877 }
878 if (expected_type != NULL) {
879 BasicType t = expected_type->element_type()->basic_type();
880 int element_size = type2aelembytes(t);
881 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) &&
882 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) {
883 flags &= ~LIR_OpArrayCopy::unaligned;
884 }
885 }
886 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
887 // src and dest positions are the same, or dst is zero so assume
888 // nonoverlapping copy.
889 flags &= ~LIR_OpArrayCopy::overlapping;
890 }
891
892 if (src == dst) {
893 // moving within a single array so no type checks are needed
894 if (flags & LIR_OpArrayCopy::type_check) {
895 flags &= ~LIR_OpArrayCopy::type_check;
896 }
897 }
898 *flagsp = flags;
899 *expected_typep = (ciArrayKlass*)expected_type;
900 }
901
902
903 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
904 assert(opr->is_register(), "why spill if item is not register?");
905
906 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) {
907 LIR_Opr result = new_register(T_FLOAT);
908 set_vreg_flag(result, must_start_in_memory);
909 assert(opr->is_register(), "only a register can be spilled");
910 assert(opr->value_type()->is_float(), "rounding only for floats available");
911 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
912 return result;
913 }
914 return opr;
915 }
916
917
918 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
919 assert(type2size[t] == type2size[value->type()],
920 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()));
921 if (!value->is_register()) {
922 // force into a register
923 LIR_Opr r = new_register(value->type());
924 __ move(value, r);
925 value = r;
926 }
927
928 // create a spill location
929 LIR_Opr tmp = new_register(t);
930 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
931
932 // move from register to spill
933 __ move(value, tmp);
934 return tmp;
935 }
936
937 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
938 if (if_instr->should_profile()) {
939 ciMethod* method = if_instr->profiled_method();
940 assert(method != NULL, "method should be set if branch is profiled");
941 ciMethodData* md = method->method_data_or_null();
942 assert(md != NULL, "Sanity");
943 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
944 assert(data != NULL, "must have profiling data");
945 assert(data->is_BranchData(), "need BranchData for two-way branches");
946 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
947 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
948 if (if_instr->is_swapped()) {
949 int t = taken_count_offset;
950 taken_count_offset = not_taken_count_offset;
951 not_taken_count_offset = t;
952 }
953
954 LIR_Opr md_reg = new_register(T_METADATA);
955 __ metadata2reg(md->constant_encoding(), md_reg);
956
957 LIR_Opr data_offset_reg = new_pointer_register();
958 __ cmove(lir_cond(cond),
959 LIR_OprFact::intptrConst(taken_count_offset),
960 LIR_OprFact::intptrConst(not_taken_count_offset),
961 data_offset_reg, as_BasicType(if_instr->x()->type()));
962
963 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
964 LIR_Opr data_reg = new_pointer_register();
965 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
966 __ move(data_addr, data_reg);
967 // Use leal instead of add to avoid destroying condition codes on x86
968 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
969 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
970 __ move(data_reg, data_addr);
971 }
972 }
973
974 // Phi technique:
975 // This is about passing live values from one basic block to the other.
976 // In code generated with Java it is rather rare that more than one
977 // value is on the stack from one basic block to the other.
978 // We optimize our technique for efficient passing of one value
979 // (of type long, int, double..) but it can be extended.
980 // When entering or leaving a basic block, all registers and all spill
981 // slots are release and empty. We use the released registers
982 // and spill slots to pass the live values from one block
983 // to the other. The topmost value, i.e., the value on TOS of expression
984 // stack is passed in registers. All other values are stored in spilling
985 // area. Every Phi has an index which designates its spill slot
986 // At exit of a basic block, we fill the register(s) and spill slots.
987 // At entry of a basic block, the block_prolog sets up the content of phi nodes
988 // and locks necessary registers and spilling slots.
989
990
991 // move current value to referenced phi function
992 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
993 Phi* phi = sux_val->as_Phi();
994 // cur_val can be null without phi being null in conjunction with inlining
995 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) {
996 Phi* cur_phi = cur_val->as_Phi();
997 if (cur_phi != NULL && cur_phi->is_illegal()) {
998 // Phi and local would need to get invalidated
999 // (which is unexpected for Linear Scan).
1000 // But this case is very rare so we simply bail out.
1001 bailout("propagation of illegal phi");
1002 return;
1003 }
1004 LIR_Opr operand = cur_val->operand();
1005 if (operand->is_illegal()) {
1006 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
1007 "these can be produced lazily");
1008 operand = operand_for_instruction(cur_val);
1009 }
1010 resolver->move(operand, operand_for_instruction(phi));
1011 }
1012 }
1013
1014
1015 // Moves all stack values into their PHI position
1016 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1017 BlockBegin* bb = block();
1018 if (bb->number_of_sux() == 1) {
1019 BlockBegin* sux = bb->sux_at(0);
1020 assert(sux->number_of_preds() > 0, "invalid CFG");
1021
1022 // a block with only one predecessor never has phi functions
1023 if (sux->number_of_preds() > 1) {
1024 int max_phis = cur_state->stack_size() + cur_state->locals_size();
1025 PhiResolver resolver(this, _virtual_register_number + max_phis * 2);
1026
1027 ValueStack* sux_state = sux->state();
1028 Value sux_value;
1029 int index;
1030
1031 assert(cur_state->scope() == sux_state->scope(), "not matching");
1032 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1033 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1034
1035 for_each_stack_value(sux_state, index, sux_value) {
1036 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1037 }
1038
1039 for_each_local_value(sux_state, index, sux_value) {
1040 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1041 }
1042
1043 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1044 }
1045 }
1046 }
1047
1048
1049 LIR_Opr LIRGenerator::new_register(BasicType type) {
1050 int vreg = _virtual_register_number;
1051 // add a little fudge factor for the bailout, since the bailout is
1052 // only checked periodically. This gives a few extra registers to
1053 // hand out before we really run out, which helps us keep from
1054 // tripping over assertions.
1055 if (vreg + 20 >= LIR_OprDesc::vreg_max) {
1056 bailout("out of virtual registers");
1057 if (vreg + 2 >= LIR_OprDesc::vreg_max) {
1058 // wrap it around
1059 _virtual_register_number = LIR_OprDesc::vreg_base;
1060 }
1061 }
1062 _virtual_register_number += 1;
1063 return LIR_OprFact::virtual_register(vreg, type);
1064 }
1065
1066
1067 // Try to lock using register in hint
1068 LIR_Opr LIRGenerator::rlock(Value instr) {
1069 return new_register(instr->type());
1070 }
1071
1072
1073 // does an rlock and sets result
1074 LIR_Opr LIRGenerator::rlock_result(Value x) {
1075 LIR_Opr reg = rlock(x);
1076 set_result(x, reg);
1077 return reg;
1078 }
1079
1080
1081 // does an rlock and sets result
1082 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1083 LIR_Opr reg;
1084 switch (type) {
1085 case T_BYTE:
1086 case T_BOOLEAN:
1087 reg = rlock_byte(type);
1088 break;
1089 default:
1090 reg = rlock(x);
1091 break;
1092 }
1093
1094 set_result(x, reg);
1095 return reg;
1096 }
1097
1098
1099 //---------------------------------------------------------------------
1100 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1101 ObjectType* oc = value->type()->as_ObjectType();
1102 if (oc) {
1103 return oc->constant_value();
1104 }
1105 return NULL;
1106 }
1107
1108
1109 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1110 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1111 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1112
1113 // no moves are created for phi functions at the begin of exception
1114 // handlers, so assign operands manually here
1115 for_each_phi_fun(block(), phi,
1116 operand_for_instruction(phi));
1117
1118 LIR_Opr thread_reg = getThreadPointer();
1119 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1120 exceptionOopOpr());
1121 __ move_wide(LIR_OprFact::oopConst(NULL),
1122 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1123 __ move_wide(LIR_OprFact::oopConst(NULL),
1124 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1125
1126 LIR_Opr result = new_register(T_OBJECT);
1127 __ move(exceptionOopOpr(), result);
1128 set_result(x, result);
1129 }
1130
1131
1132 //----------------------------------------------------------------------
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135 //----------------------------------------------------------------------
1136 // visitor functions
1137 //----------------------------------------------------------------------
1138 //----------------------------------------------------------------------
1139 //----------------------------------------------------------------------
1140 //----------------------------------------------------------------------
1141
1142 void LIRGenerator::do_Phi(Phi* x) {
1143 // phi functions are never visited directly
1144 ShouldNotReachHere();
1145 }
1146
1147
1148 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1149 void LIRGenerator::do_Constant(Constant* x) {
1150 if (x->state_before() != NULL) {
1151 // Any constant with a ValueStack requires patching so emit the patch here
1152 LIR_Opr reg = rlock_result(x);
1153 CodeEmitInfo* info = state_for(x, x->state_before());
1154 __ oop2reg_patch(NULL, reg, info);
1155 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1156 if (!x->is_pinned()) {
1157 // unpinned constants are handled specially so that they can be
1158 // put into registers when they are used multiple times within a
1159 // block. After the block completes their operand will be
1160 // cleared so that other blocks can't refer to that register.
1161 set_result(x, load_constant(x));
1162 } else {
1163 LIR_Opr res = x->operand();
1164 if (!res->is_valid()) {
1165 res = LIR_OprFact::value_type(x->type());
1166 }
1167 if (res->is_constant()) {
1168 LIR_Opr reg = rlock_result(x);
1169 __ move(res, reg);
1170 } else {
1171 set_result(x, res);
1172 }
1173 }
1174 } else {
1175 set_result(x, LIR_OprFact::value_type(x->type()));
1176 }
1177 }
1178
1179
1180 void LIRGenerator::do_Local(Local* x) {
1181 // operand_for_instruction has the side effect of setting the result
1182 // so there's no need to do it here.
1183 operand_for_instruction(x);
1184 }
1185
1186
1187 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) {
1188 Unimplemented();
1189 }
1190
1191
1192 void LIRGenerator::do_Return(Return* x) {
1193 if (compilation()->env()->dtrace_method_probes()) {
1194 BasicTypeList signature;
1195 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1196 signature.append(T_METADATA); // Method*
1197 LIR_OprList* args = new LIR_OprList();
1198 args->append(getThreadPointer());
1199 LIR_Opr meth = new_register(T_METADATA);
1200 __ metadata2reg(method()->constant_encoding(), meth);
1201 args->append(meth);
1202 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
1203 }
1204
1205 if (x->type()->is_void()) {
1206 __ return_op(LIR_OprFact::illegalOpr);
1207 } else {
1208 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1209 LIRItem result(x->result(), this);
1210
1211 result.load_item_force(reg);
1212 __ return_op(result.result());
1213 }
1214 set_no_result(x);
1215 }
1216
1217 // Examble: ref.get()
1218 // Combination of LoadField and g1 pre-write barrier
1219 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1220
1221 const int referent_offset = java_lang_ref_Reference::referent_offset;
1222 guarantee(referent_offset > 0, "referent offset not initialized");
1223
1224 assert(x->number_of_arguments() == 1, "wrong type");
1225
1226 LIRItem reference(x->argument_at(0), this);
1227 reference.load_item();
1228
1229 // need to perform the null check on the reference objecy
1230 CodeEmitInfo* info = NULL;
1231 if (x->needs_null_check()) {
1232 info = state_for(x);
1233 }
1234
1235 LIR_Opr result = rlock_result(x, T_OBJECT);
1236 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT,
1237 reference, LIR_OprFact::intConst(referent_offset), result);
1238 }
1239
1240 // Example: clazz.isInstance(object)
1241 void LIRGenerator::do_isInstance(Intrinsic* x) {
1242 assert(x->number_of_arguments() == 2, "wrong type");
1243
1244 // TODO could try to substitute this node with an equivalent InstanceOf
1245 // if clazz is known to be a constant Class. This will pick up newly found
1246 // constants after HIR construction. I'll leave this to a future change.
1247
1248 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1249 // could follow the aastore example in a future change.
1250
1251 LIRItem clazz(x->argument_at(0), this);
1252 LIRItem object(x->argument_at(1), this);
1253 clazz.load_item();
1254 object.load_item();
1255 LIR_Opr result = rlock_result(x);
1256
1257 // need to perform null check on clazz
1258 if (x->needs_null_check()) {
1259 CodeEmitInfo* info = state_for(x);
1260 __ null_check(clazz.result(), info);
1261 }
1262
1263 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1264 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1265 x->type(),
1266 NULL); // NULL CodeEmitInfo results in a leaf call
1267 __ move(call_result, result);
1268 }
1269
1270 // Example: object.getClass ()
1271 void LIRGenerator::do_getClass(Intrinsic* x) {
1272 assert(x->number_of_arguments() == 1, "wrong type");
1273
1274 LIRItem rcvr(x->argument_at(0), this);
1275 rcvr.load_item();
1276 LIR_Opr temp = new_register(T_METADATA);
1277 LIR_Opr result = rlock_result(x);
1278
1279 // need to perform the null check on the rcvr
1280 CodeEmitInfo* info = NULL;
1281 if (x->needs_null_check()) {
1282 info = state_for(x);
1283 }
1284
1285 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
1286 // meaning of these two is mixed up (see JDK-8026837).
1287 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1288 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp);
1289 // mirror = ((OopHandle)mirror)->resolve();
1290 access_load(IN_NATIVE, T_OBJECT,
1291 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result);
1292 }
1293
1294 // java.lang.Class::isPrimitive()
1295 void LIRGenerator::do_isPrimitive(Intrinsic* x) {
1296 assert(x->number_of_arguments() == 1, "wrong type");
1297
1298 LIRItem rcvr(x->argument_at(0), this);
1299 rcvr.load_item();
1300 LIR_Opr temp = new_register(T_METADATA);
1301 LIR_Opr result = rlock_result(x);
1302
1303 CodeEmitInfo* info = NULL;
1304 if (x->needs_null_check()) {
1305 info = state_for(x);
1306 }
1307
1308 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1309 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::intConst(0));
1310 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN);
1311 }
1312
1313
1314 // Example: Thread.currentThread()
1315 void LIRGenerator::do_currentThread(Intrinsic* x) {
1316 assert(x->number_of_arguments() == 0, "wrong type");
1317 LIR_Opr reg = rlock_result(x);
1318 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg);
1319 }
1320
1321
1322 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1323 assert(x->number_of_arguments() == 1, "wrong type");
1324 LIRItem receiver(x->argument_at(0), this);
1325
1326 receiver.load_item();
1327 BasicTypeList signature;
1328 signature.append(T_OBJECT); // receiver
1329 LIR_OprList* args = new LIR_OprList();
1330 args->append(receiver.result());
1331 CodeEmitInfo* info = state_for(x, x->state());
1332 call_runtime(&signature, args,
1333 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1334 voidType, info);
1335
1336 set_no_result(x);
1337 }
1338
1339
1340 //------------------------local access--------------------------------------
1341
1342 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1343 if (x->operand()->is_illegal()) {
1344 Constant* c = x->as_Constant();
1345 if (c != NULL) {
1346 x->set_operand(LIR_OprFact::value_type(c->type()));
1347 } else {
1348 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
1349 // allocate a virtual register for this local or phi
1350 x->set_operand(rlock(x));
1351 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
1352 }
1353 }
1354 return x->operand();
1355 }
1356
1357
1358 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
1359 if (opr->is_virtual()) {
1360 return instruction_for_vreg(opr->vreg_number());
1361 }
1362 return NULL;
1363 }
1364
1365
1366 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1367 if (reg_num < _instruction_for_operand.length()) {
1368 return _instruction_for_operand.at(reg_num);
1369 }
1370 return NULL;
1371 }
1372
1373
1374 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1375 if (_vreg_flags.size_in_bits() == 0) {
1376 BitMap2D temp(100, num_vreg_flags);
1377 _vreg_flags = temp;
1378 }
1379 _vreg_flags.at_put_grow(vreg_num, f, true);
1380 }
1381
1382 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1383 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1384 return false;
1385 }
1386 return _vreg_flags.at(vreg_num, f);
1387 }
1388
1389
1390 // Block local constant handling. This code is useful for keeping
1391 // unpinned constants and constants which aren't exposed in the IR in
1392 // registers. Unpinned Constant instructions have their operands
1393 // cleared when the block is finished so that other blocks can't end
1394 // up referring to their registers.
1395
1396 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1397 assert(!x->is_pinned(), "only for unpinned constants");
1398 _unpinned_constants.append(x);
1399 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1400 }
1401
1402
1403 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1404 BasicType t = c->type();
1405 for (int i = 0; i < _constants.length(); i++) {
1406 LIR_Const* other = _constants.at(i);
1407 if (t == other->type()) {
1408 switch (t) {
1409 case T_INT:
1410 case T_FLOAT:
1411 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1412 break;
1413 case T_LONG:
1414 case T_DOUBLE:
1415 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1416 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1417 break;
1418 case T_OBJECT:
1419 if (c->as_jobject() != other->as_jobject()) continue;
1420 break;
1421 default:
1422 break;
1423 }
1424 return _reg_for_constants.at(i);
1425 }
1426 }
1427
1428 LIR_Opr result = new_register(t);
1429 __ move((LIR_Opr)c, result);
1430 _constants.append(c);
1431 _reg_for_constants.append(result);
1432 return result;
1433 }
1434
1435 //------------------------field access--------------------------------------
1436
1437 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
1438 assert(x->number_of_arguments() == 4, "wrong type");
1439 LIRItem obj (x->argument_at(0), this); // object
1440 LIRItem offset(x->argument_at(1), this); // offset of field
1441 LIRItem cmp (x->argument_at(2), this); // value to compare with field
1442 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
1443 assert(obj.type()->tag() == objectTag, "invalid type");
1444
1445 // In 64bit the type can be long, sparc doesn't have this assert
1446 // assert(offset.type()->tag() == intTag, "invalid type");
1447
1448 assert(cmp.type()->tag() == type->tag(), "invalid type");
1449 assert(val.type()->tag() == type->tag(), "invalid type");
1450
1451 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type),
1452 obj, offset, cmp, val);
1453 set_result(x, result);
1454 }
1455
1456 // Comment copied form templateTable_i486.cpp
1457 // ----------------------------------------------------------------------------
1458 // Volatile variables demand their effects be made known to all CPU's in
1459 // order. Store buffers on most chips allow reads & writes to reorder; the
1460 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1461 // memory barrier (i.e., it's not sufficient that the interpreter does not
1462 // reorder volatile references, the hardware also must not reorder them).
1463 //
1464 // According to the new Java Memory Model (JMM):
1465 // (1) All volatiles are serialized wrt to each other.
1466 // ALSO reads & writes act as aquire & release, so:
1467 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1468 // the read float up to before the read. It's OK for non-volatile memory refs
1469 // that happen before the volatile read to float down below it.
1470 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1471 // that happen BEFORE the write float down to after the write. It's OK for
1472 // non-volatile memory refs that happen after the volatile write to float up
1473 // before it.
1474 //
1475 // We only put in barriers around volatile refs (they are expensive), not
1476 // _between_ memory refs (that would require us to track the flavor of the
1477 // previous memory refs). Requirements (2) and (3) require some barriers
1478 // before volatile stores and after volatile loads. These nearly cover
1479 // requirement (1) but miss the volatile-store-volatile-load case. This final
1480 // case is placed after volatile-stores although it could just as well go
1481 // before volatile-loads.
1482
1483
1484 void LIRGenerator::do_StoreField(StoreField* x) {
1485 bool needs_patching = x->needs_patching();
1486 bool is_volatile = x->field()->is_volatile();
1487 BasicType field_type = x->field_type();
1488
1489 CodeEmitInfo* info = NULL;
1490 if (needs_patching) {
1491 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1492 info = state_for(x, x->state_before());
1493 } else if (x->needs_null_check()) {
1494 NullCheck* nc = x->explicit_null_check();
1495 if (nc == NULL) {
1496 info = state_for(x);
1497 } else {
1498 info = state_for(nc);
1499 }
1500 }
1501
1502 LIRItem object(x->obj(), this);
1503 LIRItem value(x->value(), this);
1504
1505 object.load_item();
1506
1507 if (is_volatile || needs_patching) {
1508 // load item if field is volatile (fewer special cases for volatiles)
1509 // load item if field not initialized
1510 // load item if field not constant
1511 // because of code patching we cannot inline constants
1512 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1513 value.load_byte_item();
1514 } else {
1515 value.load_item();
1516 }
1517 } else {
1518 value.load_for_store(field_type);
1519 }
1520
1521 set_no_result(x);
1522
1523 #ifndef PRODUCT
1524 if (PrintNotLoaded && needs_patching) {
1525 tty->print_cr(" ###class not loaded at store_%s bci %d",
1526 x->is_static() ? "static" : "field", x->printable_bci());
1527 }
1528 #endif
1529
1530 if (x->needs_null_check() &&
1531 (needs_patching ||
1532 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1533 // Emit an explicit null check because the offset is too large.
1534 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1535 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1536 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1537 }
1538
1539 DecoratorSet decorators = IN_HEAP;
1540 if (is_volatile) {
1541 decorators |= MO_SEQ_CST;
1542 }
1543 if (needs_patching) {
1544 decorators |= C1_NEEDS_PATCHING;
1545 }
1546
1547 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()),
1548 value.result(), info != NULL ? new CodeEmitInfo(info) : NULL, info);
1549 }
1550
1551 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
1552 assert(x->is_pinned(),"");
1553 bool needs_range_check = x->compute_needs_range_check();
1554 bool use_length = x->length() != NULL;
1555 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
1556 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
1557 !get_jobject_constant(x->value())->is_null_object() ||
1558 x->should_profile());
1559
1560 LIRItem array(x->array(), this);
1561 LIRItem index(x->index(), this);
1562 LIRItem value(x->value(), this);
1563 LIRItem length(this);
1564
1565 array.load_item();
1566 index.load_nonconstant();
1567
1568 if (use_length && needs_range_check) {
1569 length.set_instruction(x->length());
1570 length.load_item();
1571
1572 }
1573 if (needs_store_check || x->check_boolean()) {
1574 value.load_item();
1575 } else {
1576 value.load_for_store(x->elt_type());
1577 }
1578
1579 set_no_result(x);
1580
1581 // the CodeEmitInfo must be duplicated for each different
1582 // LIR-instruction because spilling can occur anywhere between two
1583 // instructions and so the debug information must be different
1584 CodeEmitInfo* range_check_info = state_for(x);
1585 CodeEmitInfo* null_check_info = NULL;
1586 if (x->needs_null_check()) {
1587 null_check_info = new CodeEmitInfo(range_check_info);
1588 }
1589
1590 if (GenerateRangeChecks && needs_range_check) {
1591 if (use_length) {
1592 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1593 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result()));
1594 } else {
1595 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1596 // range_check also does the null check
1597 null_check_info = NULL;
1598 }
1599 }
1600
1601 if (GenerateArrayStoreCheck && needs_store_check) {
1602 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
1603 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci());
1604 }
1605
1606 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1607 if (x->check_boolean()) {
1608 decorators |= C1_MASK_BOOLEAN;
1609 }
1610
1611 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(),
1612 NULL, null_check_info);
1613 }
1614
1615 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type,
1616 LIRItem& base, LIR_Opr offset, LIR_Opr result,
1617 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) {
1618 decorators |= ACCESS_READ;
1619 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info);
1620 if (access.is_raw()) {
1621 _barrier_set->BarrierSetC1::load_at(access, result);
1622 } else {
1623 _barrier_set->load_at(access, result);
1624 }
1625 }
1626
1627 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type,
1628 LIR_Opr addr, LIR_Opr result) {
1629 decorators |= ACCESS_READ;
1630 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type);
1631 access.set_resolved_addr(addr);
1632 if (access.is_raw()) {
1633 _barrier_set->BarrierSetC1::load(access, result);
1634 } else {
1635 _barrier_set->load(access, result);
1636 }
1637 }
1638
1639 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type,
1640 LIRItem& base, LIR_Opr offset, LIR_Opr value,
1641 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
1642 decorators |= ACCESS_WRITE;
1643 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info);
1644 if (access.is_raw()) {
1645 _barrier_set->BarrierSetC1::store_at(access, value);
1646 } else {
1647 _barrier_set->store_at(access, value);
1648 }
1649 }
1650
1651 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type,
1652 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
1653 decorators |= ACCESS_READ;
1654 decorators |= ACCESS_WRITE;
1655 // Atomic operations are SEQ_CST by default
1656 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1657 LIRAccess access(this, decorators, base, offset, type);
1658 if (access.is_raw()) {
1659 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value);
1660 } else {
1661 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value);
1662 }
1663 }
1664
1665 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type,
1666 LIRItem& base, LIRItem& offset, LIRItem& value) {
1667 decorators |= ACCESS_READ;
1668 decorators |= ACCESS_WRITE;
1669 // Atomic operations are SEQ_CST by default
1670 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1671 LIRAccess access(this, decorators, base, offset, type);
1672 if (access.is_raw()) {
1673 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value);
1674 } else {
1675 return _barrier_set->atomic_xchg_at(access, value);
1676 }
1677 }
1678
1679 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type,
1680 LIRItem& base, LIRItem& offset, LIRItem& value) {
1681 decorators |= ACCESS_READ;
1682 decorators |= ACCESS_WRITE;
1683 // Atomic operations are SEQ_CST by default
1684 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1685 LIRAccess access(this, decorators, base, offset, type);
1686 if (access.is_raw()) {
1687 return _barrier_set->BarrierSetC1::atomic_add_at(access, value);
1688 } else {
1689 return _barrier_set->atomic_add_at(access, value);
1690 }
1691 }
1692
1693 LIR_Opr LIRGenerator::access_resolve(DecoratorSet decorators, LIR_Opr obj) {
1694 // Use stronger ACCESS_WRITE|ACCESS_READ by default.
1695 if ((decorators & (ACCESS_READ | ACCESS_WRITE)) == 0) {
1696 decorators |= ACCESS_READ | ACCESS_WRITE;
1697 }
1698
1699 return _barrier_set->resolve(this, decorators, obj);
1700 }
1701
1702 void LIRGenerator::do_LoadField(LoadField* x) {
1703 bool needs_patching = x->needs_patching();
1704 bool is_volatile = x->field()->is_volatile();
1705 BasicType field_type = x->field_type();
1706
1707 CodeEmitInfo* info = NULL;
1708 if (needs_patching) {
1709 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1710 info = state_for(x, x->state_before());
1711 } else if (x->needs_null_check()) {
1712 NullCheck* nc = x->explicit_null_check();
1713 if (nc == NULL) {
1714 info = state_for(x);
1715 } else {
1716 info = state_for(nc);
1717 }
1718 }
1719
1720 LIRItem object(x->obj(), this);
1721
1722 object.load_item();
1723
1724 #ifndef PRODUCT
1725 if (PrintNotLoaded && needs_patching) {
1726 tty->print_cr(" ###class not loaded at load_%s bci %d",
1727 x->is_static() ? "static" : "field", x->printable_bci());
1728 }
1729 #endif
1730
1731 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1732 if (x->needs_null_check() &&
1733 (needs_patching ||
1734 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1735 stress_deopt)) {
1736 LIR_Opr obj = object.result();
1737 if (stress_deopt) {
1738 obj = new_register(T_OBJECT);
1739 __ move(LIR_OprFact::oopConst(NULL), obj);
1740 }
1741 // Emit an explicit null check because the offset is too large.
1742 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1743 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1744 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1745 }
1746
1747 DecoratorSet decorators = IN_HEAP;
1748 if (is_volatile) {
1749 decorators |= MO_SEQ_CST;
1750 }
1751 if (needs_patching) {
1752 decorators |= C1_NEEDS_PATCHING;
1753 }
1754
1755 LIR_Opr result = rlock_result(x, field_type);
1756 access_load_at(decorators, field_type,
1757 object, LIR_OprFact::intConst(x->offset()), result,
1758 info ? new CodeEmitInfo(info) : NULL, info);
1759 }
1760
1761
1762 //------------------------java.nio.Buffer.checkIndex------------------------
1763
1764 // int java.nio.Buffer.checkIndex(int)
1765 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
1766 // NOTE: by the time we are in checkIndex() we are guaranteed that
1767 // the buffer is non-null (because checkIndex is package-private and
1768 // only called from within other methods in the buffer).
1769 assert(x->number_of_arguments() == 2, "wrong type");
1770 LIRItem buf (x->argument_at(0), this);
1771 LIRItem index(x->argument_at(1), this);
1772 buf.load_item();
1773 index.load_item();
1774
1775 LIR_Opr result = rlock_result(x);
1776 if (GenerateRangeChecks) {
1777 CodeEmitInfo* info = state_for(x);
1778 CodeStub* stub = new RangeCheckStub(info, index.result());
1779 LIR_Opr buf_obj = access_resolve(IS_NOT_NULL | ACCESS_READ, buf.result());
1780 if (index.result()->is_constant()) {
1781 cmp_mem_int(lir_cond_belowEqual, buf_obj, java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
1782 __ branch(lir_cond_belowEqual, T_INT, stub);
1783 } else {
1784 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf_obj,
1785 java_nio_Buffer::limit_offset(), T_INT, info);
1786 __ branch(lir_cond_aboveEqual, T_INT, stub);
1787 }
1788 __ move(index.result(), result);
1789 } else {
1790 // Just load the index into the result register
1791 __ move(index.result(), result);
1792 }
1793 }
1794
1795
1796 //------------------------array access--------------------------------------
1797
1798
1799 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1800 LIRItem array(x->array(), this);
1801 array.load_item();
1802 LIR_Opr reg = rlock_result(x);
1803
1804 CodeEmitInfo* info = NULL;
1805 if (x->needs_null_check()) {
1806 NullCheck* nc = x->explicit_null_check();
1807 if (nc == NULL) {
1808 info = state_for(x);
1809 } else {
1810 info = state_for(nc);
1811 }
1812 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1813 LIR_Opr obj = new_register(T_OBJECT);
1814 __ move(LIR_OprFact::oopConst(NULL), obj);
1815 __ null_check(obj, new CodeEmitInfo(info));
1816 }
1817 }
1818 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1819 }
1820
1821
1822 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1823 bool use_length = x->length() != NULL;
1824 LIRItem array(x->array(), this);
1825 LIRItem index(x->index(), this);
1826 LIRItem length(this);
1827 bool needs_range_check = x->compute_needs_range_check();
1828
1829 if (use_length && needs_range_check) {
1830 length.set_instruction(x->length());
1831 length.load_item();
1832 }
1833
1834 array.load_item();
1835 if (index.is_constant() && can_inline_as_constant(x->index())) {
1836 // let it be a constant
1837 index.dont_load_item();
1838 } else {
1839 index.load_item();
1840 }
1841
1842 CodeEmitInfo* range_check_info = state_for(x);
1843 CodeEmitInfo* null_check_info = NULL;
1844 if (x->needs_null_check()) {
1845 NullCheck* nc = x->explicit_null_check();
1846 if (nc != NULL) {
1847 null_check_info = state_for(nc);
1848 } else {
1849 null_check_info = range_check_info;
1850 }
1851 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
1852 LIR_Opr obj = new_register(T_OBJECT);
1853 __ move(LIR_OprFact::oopConst(NULL), obj);
1854 __ null_check(obj, new CodeEmitInfo(null_check_info));
1855 }
1856 }
1857
1858 if (GenerateRangeChecks && needs_range_check) {
1859 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
1860 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result(), array.result()));
1861 } else if (use_length) {
1862 // TODO: use a (modified) version of array_range_check that does not require a
1863 // constant length to be loaded to a register
1864 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1865 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result()));
1866 } else {
1867 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1868 // The range check performs the null check, so clear it out for the load
1869 null_check_info = NULL;
1870 }
1871 }
1872
1873 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1874
1875 LIR_Opr result = rlock_result(x, x->elt_type());
1876 access_load_at(decorators, x->elt_type(),
1877 array, index.result(), result,
1878 NULL, null_check_info);
1879 }
1880
1881
1882 void LIRGenerator::do_NullCheck(NullCheck* x) {
1883 if (x->can_trap()) {
1884 LIRItem value(x->obj(), this);
1885 value.load_item();
1886 CodeEmitInfo* info = state_for(x);
1887 __ null_check(value.result(), info);
1888 }
1889 }
1890
1891
1892 void LIRGenerator::do_TypeCast(TypeCast* x) {
1893 LIRItem value(x->obj(), this);
1894 value.load_item();
1895 // the result is the same as from the node we are casting
1896 set_result(x, value.result());
1897 }
1898
1899
1900 void LIRGenerator::do_Throw(Throw* x) {
1901 LIRItem exception(x->exception(), this);
1902 exception.load_item();
1903 set_no_result(x);
1904 LIR_Opr exception_opr = exception.result();
1905 CodeEmitInfo* info = state_for(x, x->state());
1906
1907 #ifndef PRODUCT
1908 if (PrintC1Statistics) {
1909 increment_counter(Runtime1::throw_count_address(), T_INT);
1910 }
1911 #endif
1912
1913 // check if the instruction has an xhandler in any of the nested scopes
1914 bool unwind = false;
1915 if (info->exception_handlers()->length() == 0) {
1916 // this throw is not inside an xhandler
1917 unwind = true;
1918 } else {
1919 // get some idea of the throw type
1920 bool type_is_exact = true;
1921 ciType* throw_type = x->exception()->exact_type();
1922 if (throw_type == NULL) {
1923 type_is_exact = false;
1924 throw_type = x->exception()->declared_type();
1925 }
1926 if (throw_type != NULL && throw_type->is_instance_klass()) {
1927 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
1928 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
1929 }
1930 }
1931
1932 // do null check before moving exception oop into fixed register
1933 // to avoid a fixed interval with an oop during the null check.
1934 // Use a copy of the CodeEmitInfo because debug information is
1935 // different for null_check and throw.
1936 if (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL) {
1937 // if the exception object wasn't created using new then it might be null.
1938 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
1939 }
1940
1941 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
1942 // we need to go through the exception lookup path to get JVMTI
1943 // notification done
1944 unwind = false;
1945 }
1946
1947 // move exception oop into fixed register
1948 __ move(exception_opr, exceptionOopOpr());
1949
1950 if (unwind) {
1951 __ unwind_exception(exceptionOopOpr());
1952 } else {
1953 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
1954 }
1955 }
1956
1957
1958 void LIRGenerator::do_RoundFP(RoundFP* x) {
1959 LIRItem input(x->input(), this);
1960 input.load_item();
1961 LIR_Opr input_opr = input.result();
1962 assert(input_opr->is_register(), "why round if value is not in a register?");
1963 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
1964 if (input_opr->is_single_fpu()) {
1965 set_result(x, round_item(input_opr)); // This code path not currently taken
1966 } else {
1967 LIR_Opr result = new_register(T_DOUBLE);
1968 set_vreg_flag(result, must_start_in_memory);
1969 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
1970 set_result(x, result);
1971 }
1972 }
1973
1974 // Here UnsafeGetRaw may have x->base() and x->index() be int or long
1975 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit.
1976 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
1977 LIRItem base(x->base(), this);
1978 LIRItem idx(this);
1979
1980 base.load_item();
1981 if (x->has_index()) {
1982 idx.set_instruction(x->index());
1983 idx.load_nonconstant();
1984 }
1985
1986 LIR_Opr reg = rlock_result(x, x->basic_type());
1987
1988 int log2_scale = 0;
1989 if (x->has_index()) {
1990 log2_scale = x->log2_scale();
1991 }
1992
1993 assert(!x->has_index() || idx.value() == x->index(), "should match");
1994
1995 LIR_Opr base_op = base.result();
1996 LIR_Opr index_op = idx.result();
1997 #ifndef _LP64
1998 if (base_op->type() == T_LONG) {
1999 base_op = new_register(T_INT);
2000 __ convert(Bytecodes::_l2i, base.result(), base_op);
2001 }
2002 if (x->has_index()) {
2003 if (index_op->type() == T_LONG) {
2004 LIR_Opr long_index_op = index_op;
2005 if (index_op->is_constant()) {
2006 long_index_op = new_register(T_LONG);
2007 __ move(index_op, long_index_op);
2008 }
2009 index_op = new_register(T_INT);
2010 __ convert(Bytecodes::_l2i, long_index_op, index_op);
2011 } else {
2012 assert(x->index()->type()->tag() == intTag, "must be");
2013 }
2014 }
2015 // At this point base and index should be all ints.
2016 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2017 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int");
2018 #else
2019 if (x->has_index()) {
2020 if (index_op->type() == T_INT) {
2021 if (!index_op->is_constant()) {
2022 index_op = new_register(T_LONG);
2023 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2024 }
2025 } else {
2026 assert(index_op->type() == T_LONG, "must be");
2027 if (index_op->is_constant()) {
2028 index_op = new_register(T_LONG);
2029 __ move(idx.result(), index_op);
2030 }
2031 }
2032 }
2033 // At this point base is a long non-constant
2034 // Index is a long register or a int constant.
2035 // We allow the constant to stay an int because that would allow us a more compact encoding by
2036 // embedding an immediate offset in the address expression. If we have a long constant, we have to
2037 // move it into a register first.
2038 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant");
2039 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) ||
2040 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type");
2041 #endif
2042
2043 BasicType dst_type = x->basic_type();
2044
2045 LIR_Address* addr;
2046 if (index_op->is_constant()) {
2047 assert(log2_scale == 0, "must not have a scale");
2048 assert(index_op->type() == T_INT, "only int constants supported");
2049 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
2050 } else {
2051 #ifdef X86
2052 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
2053 #elif defined(GENERATE_ADDRESS_IS_PREFERRED)
2054 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type);
2055 #else
2056 if (index_op->is_illegal() || log2_scale == 0) {
2057 addr = new LIR_Address(base_op, index_op, dst_type);
2058 } else {
2059 LIR_Opr tmp = new_pointer_register();
2060 __ shift_left(index_op, log2_scale, tmp);
2061 addr = new LIR_Address(base_op, tmp, dst_type);
2062 }
2063 #endif
2064 }
2065
2066 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
2067 __ unaligned_move(addr, reg);
2068 } else {
2069 if (dst_type == T_OBJECT && x->is_wide()) {
2070 __ move_wide(addr, reg);
2071 } else {
2072 __ move(addr, reg);
2073 }
2074 }
2075 }
2076
2077
2078 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
2079 int log2_scale = 0;
2080 BasicType type = x->basic_type();
2081
2082 if (x->has_index()) {
2083 log2_scale = x->log2_scale();
2084 }
2085
2086 LIRItem base(x->base(), this);
2087 LIRItem value(x->value(), this);
2088 LIRItem idx(this);
2089
2090 base.load_item();
2091 if (x->has_index()) {
2092 idx.set_instruction(x->index());
2093 idx.load_item();
2094 }
2095
2096 if (type == T_BYTE || type == T_BOOLEAN) {
2097 value.load_byte_item();
2098 } else {
2099 value.load_item();
2100 }
2101
2102 set_no_result(x);
2103
2104 LIR_Opr base_op = base.result();
2105 LIR_Opr index_op = idx.result();
2106
2107 #ifdef GENERATE_ADDRESS_IS_PREFERRED
2108 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type());
2109 #else
2110 #ifndef _LP64
2111 if (base_op->type() == T_LONG) {
2112 base_op = new_register(T_INT);
2113 __ convert(Bytecodes::_l2i, base.result(), base_op);
2114 }
2115 if (x->has_index()) {
2116 if (index_op->type() == T_LONG) {
2117 index_op = new_register(T_INT);
2118 __ convert(Bytecodes::_l2i, idx.result(), index_op);
2119 }
2120 }
2121 // At this point base and index should be all ints and not constants
2122 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2123 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int");
2124 #else
2125 if (x->has_index()) {
2126 if (index_op->type() == T_INT) {
2127 index_op = new_register(T_LONG);
2128 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2129 }
2130 }
2131 // At this point base and index are long and non-constant
2132 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long");
2133 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long");
2134 #endif
2135
2136 if (log2_scale != 0) {
2137 // temporary fix (platform dependent code without shift on Intel would be better)
2138 // TODO: ARM also allows embedded shift in the address
2139 LIR_Opr tmp = new_pointer_register();
2140 if (TwoOperandLIRForm) {
2141 __ move(index_op, tmp);
2142 index_op = tmp;
2143 }
2144 __ shift_left(index_op, log2_scale, tmp);
2145 if (!TwoOperandLIRForm) {
2146 index_op = tmp;
2147 }
2148 }
2149
2150 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
2151 #endif // !GENERATE_ADDRESS_IS_PREFERRED
2152 __ move(value.result(), addr);
2153 }
2154
2155
2156 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
2157 BasicType type = x->basic_type();
2158 LIRItem src(x->object(), this);
2159 LIRItem off(x->offset(), this);
2160
2161 off.load_item();
2162 src.load_item();
2163
2164 DecoratorSet decorators = IN_HEAP;
2165
2166 if (x->is_volatile()) {
2167 decorators |= MO_SEQ_CST;
2168 }
2169 if (type == T_BOOLEAN) {
2170 decorators |= C1_MASK_BOOLEAN;
2171 }
2172 if (type == T_ARRAY || type == T_OBJECT) {
2173 decorators |= ON_UNKNOWN_OOP_REF;
2174 }
2175
2176 LIR_Opr result = rlock_result(x, type);
2177 access_load_at(decorators, type,
2178 src, off.result(), result);
2179 }
2180
2181
2182 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
2183 BasicType type = x->basic_type();
2184 LIRItem src(x->object(), this);
2185 LIRItem off(x->offset(), this);
2186 LIRItem data(x->value(), this);
2187
2188 src.load_item();
2189 if (type == T_BOOLEAN || type == T_BYTE) {
2190 data.load_byte_item();
2191 } else {
2192 data.load_item();
2193 }
2194 off.load_item();
2195
2196 set_no_result(x);
2197
2198 DecoratorSet decorators = IN_HEAP;
2199 if (type == T_ARRAY || type == T_OBJECT) {
2200 decorators |= ON_UNKNOWN_OOP_REF;
2201 }
2202 if (x->is_volatile()) {
2203 decorators |= MO_SEQ_CST;
2204 }
2205 access_store_at(decorators, type, src, off.result(), data.result());
2206 }
2207
2208 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
2209 BasicType type = x->basic_type();
2210 LIRItem src(x->object(), this);
2211 LIRItem off(x->offset(), this);
2212 LIRItem value(x->value(), this);
2213
2214 DecoratorSet decorators = IN_HEAP | MO_SEQ_CST;
2215
2216 if (type == T_ARRAY || type == T_OBJECT) {
2217 decorators |= ON_UNKNOWN_OOP_REF;
2218 }
2219
2220 LIR_Opr result;
2221 if (x->is_add()) {
2222 result = access_atomic_add_at(decorators, type, src, off, value);
2223 } else {
2224 result = access_atomic_xchg_at(decorators, type, src, off, value);
2225 }
2226 set_result(x, result);
2227 }
2228
2229 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2230 int lng = x->length();
2231
2232 for (int i = 0; i < lng; i++) {
2233 SwitchRange* one_range = x->at(i);
2234 int low_key = one_range->low_key();
2235 int high_key = one_range->high_key();
2236 BlockBegin* dest = one_range->sux();
2237 if (low_key == high_key) {
2238 __ cmp(lir_cond_equal, value, low_key);
2239 __ branch(lir_cond_equal, T_INT, dest);
2240 } else if (high_key - low_key == 1) {
2241 __ cmp(lir_cond_equal, value, low_key);
2242 __ branch(lir_cond_equal, T_INT, dest);
2243 __ cmp(lir_cond_equal, value, high_key);
2244 __ branch(lir_cond_equal, T_INT, dest);
2245 } else {
2246 LabelObj* L = new LabelObj();
2247 __ cmp(lir_cond_less, value, low_key);
2248 __ branch(lir_cond_less, T_INT, L->label());
2249 __ cmp(lir_cond_lessEqual, value, high_key);
2250 __ branch(lir_cond_lessEqual, T_INT, dest);
2251 __ branch_destination(L->label());
2252 }
2253 }
2254 __ jump(default_sux);
2255 }
2256
2257
2258 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2259 SwitchRangeList* res = new SwitchRangeList();
2260 int len = x->length();
2261 if (len > 0) {
2262 BlockBegin* sux = x->sux_at(0);
2263 int key = x->lo_key();
2264 BlockBegin* default_sux = x->default_sux();
2265 SwitchRange* range = new SwitchRange(key, sux);
2266 for (int i = 0; i < len; i++, key++) {
2267 BlockBegin* new_sux = x->sux_at(i);
2268 if (sux == new_sux) {
2269 // still in same range
2270 range->set_high_key(key);
2271 } else {
2272 // skip tests which explicitly dispatch to the default
2273 if (sux != default_sux) {
2274 res->append(range);
2275 }
2276 range = new SwitchRange(key, new_sux);
2277 }
2278 sux = new_sux;
2279 }
2280 if (res->length() == 0 || res->last() != range) res->append(range);
2281 }
2282 return res;
2283 }
2284
2285
2286 // we expect the keys to be sorted by increasing value
2287 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2288 SwitchRangeList* res = new SwitchRangeList();
2289 int len = x->length();
2290 if (len > 0) {
2291 BlockBegin* default_sux = x->default_sux();
2292 int key = x->key_at(0);
2293 BlockBegin* sux = x->sux_at(0);
2294 SwitchRange* range = new SwitchRange(key, sux);
2295 for (int i = 1; i < len; i++) {
2296 int new_key = x->key_at(i);
2297 BlockBegin* new_sux = x->sux_at(i);
2298 if (key+1 == new_key && sux == new_sux) {
2299 // still in same range
2300 range->set_high_key(new_key);
2301 } else {
2302 // skip tests which explicitly dispatch to the default
2303 if (range->sux() != default_sux) {
2304 res->append(range);
2305 }
2306 range = new SwitchRange(new_key, new_sux);
2307 }
2308 key = new_key;
2309 sux = new_sux;
2310 }
2311 if (res->length() == 0 || res->last() != range) res->append(range);
2312 }
2313 return res;
2314 }
2315
2316
2317 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2318 LIRItem tag(x->tag(), this);
2319 tag.load_item();
2320 set_no_result(x);
2321
2322 if (x->is_safepoint()) {
2323 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2324 }
2325
2326 // move values into phi locations
2327 move_to_phi(x->state());
2328
2329 int lo_key = x->lo_key();
2330 int len = x->length();
2331 assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
2332 LIR_Opr value = tag.result();
2333
2334 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2335 ciMethod* method = x->state()->scope()->method();
2336 ciMethodData* md = method->method_data_or_null();
2337 assert(md != NULL, "Sanity");
2338 ciProfileData* data = md->bci_to_data(x->state()->bci());
2339 assert(data != NULL, "must have profiling data");
2340 assert(data->is_MultiBranchData(), "bad profile data?");
2341 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2342 LIR_Opr md_reg = new_register(T_METADATA);
2343 __ metadata2reg(md->constant_encoding(), md_reg);
2344 LIR_Opr data_offset_reg = new_pointer_register();
2345 LIR_Opr tmp_reg = new_pointer_register();
2346
2347 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2348 for (int i = 0; i < len; i++) {
2349 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2350 __ cmp(lir_cond_equal, value, i + lo_key);
2351 __ move(data_offset_reg, tmp_reg);
2352 __ cmove(lir_cond_equal,
2353 LIR_OprFact::intptrConst(count_offset),
2354 tmp_reg,
2355 data_offset_reg, T_INT);
2356 }
2357
2358 LIR_Opr data_reg = new_pointer_register();
2359 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2360 __ move(data_addr, data_reg);
2361 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2362 __ move(data_reg, data_addr);
2363 }
2364
2365 if (UseTableRanges) {
2366 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2367 } else {
2368 for (int i = 0; i < len; i++) {
2369 __ cmp(lir_cond_equal, value, i + lo_key);
2370 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2371 }
2372 __ jump(x->default_sux());
2373 }
2374 }
2375
2376
2377 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2378 LIRItem tag(x->tag(), this);
2379 tag.load_item();
2380 set_no_result(x);
2381
2382 if (x->is_safepoint()) {
2383 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2384 }
2385
2386 // move values into phi locations
2387 move_to_phi(x->state());
2388
2389 LIR_Opr value = tag.result();
2390 int len = x->length();
2391
2392 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2393 ciMethod* method = x->state()->scope()->method();
2394 ciMethodData* md = method->method_data_or_null();
2395 assert(md != NULL, "Sanity");
2396 ciProfileData* data = md->bci_to_data(x->state()->bci());
2397 assert(data != NULL, "must have profiling data");
2398 assert(data->is_MultiBranchData(), "bad profile data?");
2399 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2400 LIR_Opr md_reg = new_register(T_METADATA);
2401 __ metadata2reg(md->constant_encoding(), md_reg);
2402 LIR_Opr data_offset_reg = new_pointer_register();
2403 LIR_Opr tmp_reg = new_pointer_register();
2404
2405 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2406 for (int i = 0; i < len; i++) {
2407 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2408 __ cmp(lir_cond_equal, value, x->key_at(i));
2409 __ move(data_offset_reg, tmp_reg);
2410 __ cmove(lir_cond_equal,
2411 LIR_OprFact::intptrConst(count_offset),
2412 tmp_reg,
2413 data_offset_reg, T_INT);
2414 }
2415
2416 LIR_Opr data_reg = new_pointer_register();
2417 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2418 __ move(data_addr, data_reg);
2419 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2420 __ move(data_reg, data_addr);
2421 }
2422
2423 if (UseTableRanges) {
2424 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2425 } else {
2426 int len = x->length();
2427 for (int i = 0; i < len; i++) {
2428 __ cmp(lir_cond_equal, value, x->key_at(i));
2429 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2430 }
2431 __ jump(x->default_sux());
2432 }
2433 }
2434
2435
2436 void LIRGenerator::do_Goto(Goto* x) {
2437 set_no_result(x);
2438
2439 if (block()->next()->as_OsrEntry()) {
2440 // need to free up storage used for OSR entry point
2441 LIR_Opr osrBuffer = block()->next()->operand();
2442 BasicTypeList signature;
2443 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2444 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2445 __ move(osrBuffer, cc->args()->at(0));
2446 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2447 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2448 }
2449
2450 if (x->is_safepoint()) {
2451 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2452
2453 // increment backedge counter if needed
2454 CodeEmitInfo* info = state_for(x, state);
2455 increment_backedge_counter(info, x->profiled_bci());
2456 CodeEmitInfo* safepoint_info = state_for(x, state);
2457 __ safepoint(safepoint_poll_register(), safepoint_info);
2458 }
2459
2460 // Gotos can be folded Ifs, handle this case.
2461 if (x->should_profile()) {
2462 ciMethod* method = x->profiled_method();
2463 assert(method != NULL, "method should be set if branch is profiled");
2464 ciMethodData* md = method->method_data_or_null();
2465 assert(md != NULL, "Sanity");
2466 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2467 assert(data != NULL, "must have profiling data");
2468 int offset;
2469 if (x->direction() == Goto::taken) {
2470 assert(data->is_BranchData(), "need BranchData for two-way branches");
2471 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2472 } else if (x->direction() == Goto::not_taken) {
2473 assert(data->is_BranchData(), "need BranchData for two-way branches");
2474 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2475 } else {
2476 assert(data->is_JumpData(), "need JumpData for branches");
2477 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2478 }
2479 LIR_Opr md_reg = new_register(T_METADATA);
2480 __ metadata2reg(md->constant_encoding(), md_reg);
2481
2482 increment_counter(new LIR_Address(md_reg, offset,
2483 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2484 }
2485
2486 // emit phi-instruction move after safepoint since this simplifies
2487 // describing the state as the safepoint.
2488 move_to_phi(x->state());
2489
2490 __ jump(x->default_sux());
2491 }
2492
2493 /**
2494 * Emit profiling code if needed for arguments, parameters, return value types
2495 *
2496 * @param md MDO the code will update at runtime
2497 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2498 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2499 * @param profiled_k current profile
2500 * @param obj IR node for the object to be profiled
2501 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2502 * Set once we find an update to make and use for next ones.
2503 * @param not_null true if we know obj cannot be null
2504 * @param signature_at_call_k signature at call for obj
2505 * @param callee_signature_k signature of callee for obj
2506 * at call and callee signatures differ at method handle call
2507 * @return the only klass we know will ever be seen at this profile point
2508 */
2509 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2510 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2511 ciKlass* callee_signature_k) {
2512 ciKlass* result = NULL;
2513 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2514 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2515 // known not to be null or null bit already set and already set to
2516 // unknown: nothing we can do to improve profiling
2517 if (!do_null && !do_update) {
2518 return result;
2519 }
2520
2521 ciKlass* exact_klass = NULL;
2522 Compilation* comp = Compilation::current();
2523 if (do_update) {
2524 // try to find exact type, using CHA if possible, so that loading
2525 // the klass from the object can be avoided
2526 ciType* type = obj->exact_type();
2527 if (type == NULL) {
2528 type = obj->declared_type();
2529 type = comp->cha_exact_type(type);
2530 }
2531 assert(type == NULL || type->is_klass(), "type should be class");
2532 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL;
2533
2534 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2535 }
2536
2537 if (!do_null && !do_update) {
2538 return result;
2539 }
2540
2541 ciKlass* exact_signature_k = NULL;
2542 if (do_update) {
2543 // Is the type from the signature exact (the only one possible)?
2544 exact_signature_k = signature_at_call_k->exact_klass();
2545 if (exact_signature_k == NULL) {
2546 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2547 } else {
2548 result = exact_signature_k;
2549 // Known statically. No need to emit any code: prevent
2550 // LIR_Assembler::emit_profile_type() from emitting useless code
2551 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2552 }
2553 // exact_klass and exact_signature_k can be both non NULL but
2554 // different if exact_klass is loaded after the ciObject for
2555 // exact_signature_k is created.
2556 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) {
2557 // sometimes the type of the signature is better than the best type
2558 // the compiler has
2559 exact_klass = exact_signature_k;
2560 }
2561 if (callee_signature_k != NULL &&
2562 callee_signature_k != signature_at_call_k) {
2563 ciKlass* improved_klass = callee_signature_k->exact_klass();
2564 if (improved_klass == NULL) {
2565 improved_klass = comp->cha_exact_type(callee_signature_k);
2566 }
2567 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) {
2568 exact_klass = exact_signature_k;
2569 }
2570 }
2571 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2572 }
2573
2574 if (!do_null && !do_update) {
2575 return result;
2576 }
2577
2578 if (mdp == LIR_OprFact::illegalOpr) {
2579 mdp = new_register(T_METADATA);
2580 __ metadata2reg(md->constant_encoding(), mdp);
2581 if (md_base_offset != 0) {
2582 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2583 mdp = new_pointer_register();
2584 __ leal(LIR_OprFact::address(base_type_address), mdp);
2585 }
2586 }
2587 LIRItem value(obj, this);
2588 value.load_item();
2589 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2590 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
2591 return result;
2592 }
2593
2594 // profile parameters on entry to the root of the compilation
2595 void LIRGenerator::profile_parameters(Base* x) {
2596 if (compilation()->profile_parameters()) {
2597 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2598 ciMethodData* md = scope()->method()->method_data_or_null();
2599 assert(md != NULL, "Sanity");
2600
2601 if (md->parameters_type_data() != NULL) {
2602 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2603 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2604 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2605 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2606 LIR_Opr src = args->at(i);
2607 assert(!src->is_illegal(), "check");
2608 BasicType t = src->type();
2609 if (t == T_OBJECT || t == T_ARRAY) {
2610 intptr_t profiled_k = parameters->type(j);
2611 Local* local = x->state()->local_at(java_index)->as_Local();
2612 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2613 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2614 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
2615 // If the profile is known statically set it once for all and do not emit any code
2616 if (exact != NULL) {
2617 md->set_parameter_type(j, exact);
2618 }
2619 j++;
2620 }
2621 java_index += type2size[t];
2622 }
2623 }
2624 }
2625 }
2626
2627 void LIRGenerator::do_Base(Base* x) {
2628 __ std_entry(LIR_OprFact::illegalOpr);
2629 // Emit moves from physical registers / stack slots to virtual registers
2630 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2631 IRScope* irScope = compilation()->hir()->top_scope();
2632 int java_index = 0;
2633 for (int i = 0; i < args->length(); i++) {
2634 LIR_Opr src = args->at(i);
2635 assert(!src->is_illegal(), "check");
2636 BasicType t = src->type();
2637
2638 // Types which are smaller than int are passed as int, so
2639 // correct the type which passed.
2640 switch (t) {
2641 case T_BYTE:
2642 case T_BOOLEAN:
2643 case T_SHORT:
2644 case T_CHAR:
2645 t = T_INT;
2646 break;
2647 default:
2648 break;
2649 }
2650
2651 LIR_Opr dest = new_register(t);
2652 __ move(src, dest);
2653
2654 // Assign new location to Local instruction for this local
2655 Local* local = x->state()->local_at(java_index)->as_Local();
2656 assert(local != NULL, "Locals for incoming arguments must have been created");
2657 #ifndef __SOFTFP__
2658 // The java calling convention passes double as long and float as int.
2659 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2660 #endif // __SOFTFP__
2661 local->set_operand(dest);
2662 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
2663 java_index += type2size[t];
2664 }
2665
2666 if (compilation()->env()->dtrace_method_probes()) {
2667 BasicTypeList signature;
2668 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2669 signature.append(T_METADATA); // Method*
2670 LIR_OprList* args = new LIR_OprList();
2671 args->append(getThreadPointer());
2672 LIR_Opr meth = new_register(T_METADATA);
2673 __ metadata2reg(method()->constant_encoding(), meth);
2674 args->append(meth);
2675 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
2676 }
2677
2678 if (method()->is_synchronized()) {
2679 LIR_Opr obj;
2680 if (method()->is_static()) {
2681 obj = new_register(T_OBJECT);
2682 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2683 } else {
2684 Local* receiver = x->state()->local_at(0)->as_Local();
2685 assert(receiver != NULL, "must already exist");
2686 obj = receiver->operand();
2687 }
2688 assert(obj->is_valid(), "must be valid");
2689
2690 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2691 LIR_Opr lock = syncLockOpr();
2692 __ load_stack_address_monitor(0, lock);
2693
2694 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException));
2695 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2696
2697 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
2698 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
2699 }
2700 }
2701 if (compilation()->age_code()) {
2702 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false);
2703 decrement_age(info);
2704 }
2705 // increment invocation counters if needed
2706 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2707 profile_parameters(x);
2708 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false);
2709 increment_invocation_counter(info);
2710 }
2711
2712 // all blocks with a successor must end with an unconditional jump
2713 // to the successor even if they are consecutive
2714 __ jump(x->default_sux());
2715 }
2716
2717
2718 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2719 // construct our frame and model the production of incoming pointer
2720 // to the OSR buffer.
2721 __ osr_entry(LIR_Assembler::osrBufferPointer());
2722 LIR_Opr result = rlock_result(x);
2723 __ move(LIR_Assembler::osrBufferPointer(), result);
2724 }
2725
2726
2727 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2728 assert(args->length() == arg_list->length(),
2729 "args=%d, arg_list=%d", args->length(), arg_list->length());
2730 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2731 LIRItem* param = args->at(i);
2732 LIR_Opr loc = arg_list->at(i);
2733 if (loc->is_register()) {
2734 param->load_item_force(loc);
2735 } else {
2736 LIR_Address* addr = loc->as_address_ptr();
2737 param->load_for_store(addr->type());
2738 if (addr->type() == T_OBJECT) {
2739 __ move_wide(param->result(), addr);
2740 } else
2741 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
2742 __ unaligned_move(param->result(), addr);
2743 } else {
2744 __ move(param->result(), addr);
2745 }
2746 }
2747 }
2748
2749 if (x->has_receiver()) {
2750 LIRItem* receiver = args->at(0);
2751 LIR_Opr loc = arg_list->at(0);
2752 if (loc->is_register()) {
2753 receiver->load_item_force(loc);
2754 } else {
2755 assert(loc->is_address(), "just checking");
2756 receiver->load_for_store(T_OBJECT);
2757 __ move_wide(receiver->result(), loc->as_address_ptr());
2758 }
2759 }
2760 }
2761
2762
2763 // Visits all arguments, returns appropriate items without loading them
2764 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2765 LIRItemList* argument_items = new LIRItemList();
2766 if (x->has_receiver()) {
2767 LIRItem* receiver = new LIRItem(x->receiver(), this);
2768 argument_items->append(receiver);
2769 }
2770 for (int i = 0; i < x->number_of_arguments(); i++) {
2771 LIRItem* param = new LIRItem(x->argument_at(i), this);
2772 argument_items->append(param);
2773 }
2774 return argument_items;
2775 }
2776
2777
2778 // The invoke with receiver has following phases:
2779 // a) traverse and load/lock receiver;
2780 // b) traverse all arguments -> item-array (invoke_visit_argument)
2781 // c) push receiver on stack
2782 // d) load each of the items and push on stack
2783 // e) unlock receiver
2784 // f) move receiver into receiver-register %o0
2785 // g) lock result registers and emit call operation
2786 //
2787 // Before issuing a call, we must spill-save all values on stack
2788 // that are in caller-save register. "spill-save" moves those registers
2789 // either in a free callee-save register or spills them if no free
2790 // callee save register is available.
2791 //
2792 // The problem is where to invoke spill-save.
2793 // - if invoked between e) and f), we may lock callee save
2794 // register in "spill-save" that destroys the receiver register
2795 // before f) is executed
2796 // - if we rearrange f) to be earlier (by loading %o0) it
2797 // may destroy a value on the stack that is currently in %o0
2798 // and is waiting to be spilled
2799 // - if we keep the receiver locked while doing spill-save,
2800 // we cannot spill it as it is spill-locked
2801 //
2802 void LIRGenerator::do_Invoke(Invoke* x) {
2803 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2804
2805 LIR_OprList* arg_list = cc->args();
2806 LIRItemList* args = invoke_visit_arguments(x);
2807 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2808
2809 // setup result register
2810 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2811 if (x->type() != voidType) {
2812 result_register = result_register_for(x->type());
2813 }
2814
2815 CodeEmitInfo* info = state_for(x, x->state());
2816
2817 invoke_load_arguments(x, args, arg_list);
2818
2819 if (x->has_receiver()) {
2820 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2821 receiver = args->at(0)->result();
2822 }
2823
2824 // emit invoke code
2825 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2826
2827 // JSR 292
2828 // Preserve the SP over MethodHandle call sites, if needed.
2829 ciMethod* target = x->target();
2830 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
2831 target->is_method_handle_intrinsic() ||
2832 target->is_compiled_lambda_form());
2833 if (is_method_handle_invoke) {
2834 info->set_is_method_handle_invoke(true);
2835 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2836 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
2837 }
2838 }
2839
2840 switch (x->code()) {
2841 case Bytecodes::_invokestatic:
2842 __ call_static(target, result_register,
2843 SharedRuntime::get_resolve_static_call_stub(),
2844 arg_list, info);
2845 break;
2846 case Bytecodes::_invokespecial:
2847 case Bytecodes::_invokevirtual:
2848 case Bytecodes::_invokeinterface:
2849 // for loaded and final (method or class) target we still produce an inline cache,
2850 // in order to be able to call mixed mode
2851 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) {
2852 __ call_opt_virtual(target, receiver, result_register,
2853 SharedRuntime::get_resolve_opt_virtual_call_stub(),
2854 arg_list, info);
2855 } else if (x->vtable_index() < 0) {
2856 __ call_icvirtual(target, receiver, result_register,
2857 SharedRuntime::get_resolve_virtual_call_stub(),
2858 arg_list, info);
2859 } else {
2860 int entry_offset = in_bytes(Klass::vtable_start_offset()) + x->vtable_index() * vtableEntry::size_in_bytes();
2861 int vtable_offset = entry_offset + vtableEntry::method_offset_in_bytes();
2862 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info);
2863 }
2864 break;
2865 case Bytecodes::_invokedynamic: {
2866 __ call_dynamic(target, receiver, result_register,
2867 SharedRuntime::get_resolve_static_call_stub(),
2868 arg_list, info);
2869 break;
2870 }
2871 default:
2872 fatal("unexpected bytecode: %s", Bytecodes::name(x->code()));
2873 break;
2874 }
2875
2876 // JSR 292
2877 // Restore the SP after MethodHandle call sites, if needed.
2878 if (is_method_handle_invoke
2879 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2880 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
2881 }
2882
2883 if (x->type()->is_float() || x->type()->is_double()) {
2884 // Force rounding of results from non-strictfp when in strictfp
2885 // scope (or when we don't know the strictness of the callee, to
2886 // be safe.)
2887 if (method()->is_strict()) {
2888 if (!x->target_is_loaded() || !x->target_is_strictfp()) {
2889 result_register = round_item(result_register);
2890 }
2891 }
2892 }
2893
2894 if (result_register->is_valid()) {
2895 LIR_Opr result = rlock_result(x);
2896 __ move(result_register, result);
2897 }
2898 }
2899
2900
2901 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
2902 assert(x->number_of_arguments() == 1, "wrong type");
2903 LIRItem value (x->argument_at(0), this);
2904 LIR_Opr reg = rlock_result(x);
2905 value.load_item();
2906 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
2907 __ move(tmp, reg);
2908 }
2909
2910
2911
2912 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
2913 void LIRGenerator::do_IfOp(IfOp* x) {
2914 #ifdef ASSERT
2915 {
2916 ValueTag xtag = x->x()->type()->tag();
2917 ValueTag ttag = x->tval()->type()->tag();
2918 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
2919 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
2920 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
2921 }
2922 #endif
2923
2924 LIRItem left(x->x(), this);
2925 LIRItem right(x->y(), this);
2926 left.load_item();
2927 if (can_inline_as_constant(right.value())) {
2928 right.dont_load_item();
2929 } else {
2930 right.load_item();
2931 }
2932
2933 LIRItem t_val(x->tval(), this);
2934 LIRItem f_val(x->fval(), this);
2935 t_val.dont_load_item();
2936 f_val.dont_load_item();
2937 LIR_Opr reg = rlock_result(x);
2938
2939 __ cmp(lir_cond(x->cond()), left.result(), right.result());
2940 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
2941 }
2942
2943 #ifdef JFR_HAVE_INTRINSICS
2944 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
2945 CodeEmitInfo* info = state_for(x);
2946 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check
2947
2948 assert(info != NULL, "must have info");
2949 LIRItem arg(x->argument_at(0), this);
2950
2951 arg.load_item();
2952 LIR_Opr klass = new_register(T_METADATA);
2953 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), klass, info);
2954 LIR_Opr id = new_register(T_LONG);
2955 ByteSize offset = KLASS_TRACE_ID_OFFSET;
2956 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG);
2957
2958 __ move(trace_id_addr, id);
2959 __ logical_or(id, LIR_OprFact::longConst(0x01l), id);
2960 __ store(id, trace_id_addr);
2961
2962 #ifdef TRACE_ID_META_BITS
2963 __ logical_and(id, LIR_OprFact::longConst(~TRACE_ID_META_BITS), id);
2964 #endif
2965 #ifdef TRACE_ID_SHIFT
2966 __ unsigned_shift_right(id, TRACE_ID_SHIFT, id);
2967 #endif
2968
2969 __ move(id, rlock_result(x));
2970 }
2971
2972 void LIRGenerator::do_getEventWriter(Intrinsic* x) {
2973 LabelObj* L_end = new LabelObj();
2974
2975 LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(),
2976 in_bytes(THREAD_LOCAL_WRITER_OFFSET_JFR),
2977 T_OBJECT);
2978 LIR_Opr result = rlock_result(x);
2979 __ move_wide(jobj_addr, result);
2980 __ cmp(lir_cond_equal, result, LIR_OprFact::oopConst(NULL));
2981 __ branch(lir_cond_equal, T_OBJECT, L_end->label());
2982
2983 LIR_Opr jobj = new_register(T_OBJECT);
2984 __ move(result, jobj);
2985 access_load(IN_NATIVE, T_OBJECT, LIR_OprFact::address(new LIR_Address(jobj, T_OBJECT)), result);
2986
2987 __ branch_destination(L_end->label());
2988 }
2989
2990 #endif
2991
2992
2993 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
2994 assert(x->number_of_arguments() == 0, "wrong type");
2995 // Enforce computation of _reserved_argument_area_size which is required on some platforms.
2996 BasicTypeList signature;
2997 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2998 LIR_Opr reg = result_register_for(x->type());
2999 __ call_runtime_leaf(routine, getThreadTemp(),
3000 reg, new LIR_OprList());
3001 LIR_Opr result = rlock_result(x);
3002 __ move(reg, result);
3003 }
3004
3005
3006
3007 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
3008 switch (x->id()) {
3009 case vmIntrinsics::_intBitsToFloat :
3010 case vmIntrinsics::_doubleToRawLongBits :
3011 case vmIntrinsics::_longBitsToDouble :
3012 case vmIntrinsics::_floatToRawIntBits : {
3013 do_FPIntrinsics(x);
3014 break;
3015 }
3016
3017 #ifdef JFR_HAVE_INTRINSICS
3018 case vmIntrinsics::_getClassId:
3019 do_ClassIDIntrinsic(x);
3020 break;
3021 case vmIntrinsics::_getEventWriter:
3022 do_getEventWriter(x);
3023 break;
3024 case vmIntrinsics::_counterTime:
3025 do_RuntimeCall(CAST_FROM_FN_PTR(address, JFR_TIME_FUNCTION), x);
3026 break;
3027 #endif
3028
3029 case vmIntrinsics::_currentTimeMillis:
3030 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x);
3031 break;
3032
3033 case vmIntrinsics::_nanoTime:
3034 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x);
3035 break;
3036
3037 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
3038 case vmIntrinsics::_isInstance: do_isInstance(x); break;
3039 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break;
3040 case vmIntrinsics::_getClass: do_getClass(x); break;
3041 case vmIntrinsics::_currentThread: do_currentThread(x); break;
3042
3043 case vmIntrinsics::_dlog: // fall through
3044 case vmIntrinsics::_dlog10: // fall through
3045 case vmIntrinsics::_dabs: // fall through
3046 case vmIntrinsics::_dsqrt: // fall through
3047 case vmIntrinsics::_dtan: // fall through
3048 case vmIntrinsics::_dsin : // fall through
3049 case vmIntrinsics::_dcos : // fall through
3050 case vmIntrinsics::_dexp : // fall through
3051 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
3052 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
3053
3054 case vmIntrinsics::_fmaD: do_FmaIntrinsic(x); break;
3055 case vmIntrinsics::_fmaF: do_FmaIntrinsic(x); break;
3056
3057 // java.nio.Buffer.checkIndex
3058 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
3059
3060 case vmIntrinsics::_compareAndSetObject:
3061 do_CompareAndSwap(x, objectType);
3062 break;
3063 case vmIntrinsics::_compareAndSetInt:
3064 do_CompareAndSwap(x, intType);
3065 break;
3066 case vmIntrinsics::_compareAndSetLong:
3067 do_CompareAndSwap(x, longType);
3068 break;
3069
3070 case vmIntrinsics::_loadFence :
3071 if (os::is_MP()) __ membar_acquire();
3072 break;
3073 case vmIntrinsics::_storeFence:
3074 if (os::is_MP()) __ membar_release();
3075 break;
3076 case vmIntrinsics::_fullFence :
3077 if (os::is_MP()) __ membar();
3078 break;
3079 case vmIntrinsics::_onSpinWait:
3080 __ on_spin_wait();
3081 break;
3082 case vmIntrinsics::_Reference_get:
3083 do_Reference_get(x);
3084 break;
3085
3086 case vmIntrinsics::_updateCRC32:
3087 case vmIntrinsics::_updateBytesCRC32:
3088 case vmIntrinsics::_updateByteBufferCRC32:
3089 do_update_CRC32(x);
3090 break;
3091
3092 case vmIntrinsics::_updateBytesCRC32C:
3093 case vmIntrinsics::_updateDirectByteBufferCRC32C:
3094 do_update_CRC32C(x);
3095 break;
3096
3097 case vmIntrinsics::_vectorizedMismatch:
3098 do_vectorizedMismatch(x);
3099 break;
3100
3101 default: ShouldNotReachHere(); break;
3102 }
3103 }
3104
3105 void LIRGenerator::profile_arguments(ProfileCall* x) {
3106 if (compilation()->profile_arguments()) {
3107 int bci = x->bci_of_invoke();
3108 ciMethodData* md = x->method()->method_data_or_null();
3109 assert(md != NULL, "Sanity");
3110 ciProfileData* data = md->bci_to_data(bci);
3111 if (data != NULL) {
3112 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3113 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3114 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3115 int base_offset = md->byte_offset_of_slot(data, extra);
3116 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3117 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3118
3119 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3120 int start = 0;
3121 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3122 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3123 // first argument is not profiled at call (method handle invoke)
3124 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3125 start = 1;
3126 }
3127 ciSignature* callee_signature = x->callee()->signature();
3128 // method handle call to virtual method
3129 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3130 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
3131
3132 bool ignored_will_link;
3133 ciSignature* signature_at_call = NULL;
3134 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3135 ciSignatureStream signature_at_call_stream(signature_at_call);
3136
3137 // if called through method handle invoke, some arguments may have been popped
3138 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3139 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3140 ciKlass* exact = profile_type(md, base_offset, off,
3141 args->type(i), x->profiled_arg_at(i+start), mdp,
3142 !x->arg_needs_null_check(i+start),
3143 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3144 if (exact != NULL) {
3145 md->set_argument_type(bci, i, exact);
3146 }
3147 }
3148 } else {
3149 #ifdef ASSERT
3150 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3151 int n = x->nb_profiled_args();
3152 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3153 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3154 "only at JSR292 bytecodes");
3155 #endif
3156 }
3157 }
3158 }
3159 }
3160
3161 // profile parameters on entry to an inlined method
3162 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3163 if (compilation()->profile_parameters() && x->inlined()) {
3164 ciMethodData* md = x->callee()->method_data_or_null();
3165 if (md != NULL) {
3166 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3167 if (parameters_type_data != NULL) {
3168 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3169 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3170 bool has_receiver = !x->callee()->is_static();
3171 ciSignature* sig = x->callee()->signature();
3172 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
3173 int i = 0; // to iterate on the Instructions
3174 Value arg = x->recv();
3175 bool not_null = false;
3176 int bci = x->bci_of_invoke();
3177 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3178 // The first parameter is the receiver so that's what we start
3179 // with if it exists. One exception is method handle call to
3180 // virtual method: the receiver is in the args list
3181 if (arg == NULL || !Bytecodes::has_receiver(bc)) {
3182 i = 1;
3183 arg = x->profiled_arg_at(0);
3184 not_null = !x->arg_needs_null_check(0);
3185 }
3186 int k = 0; // to iterate on the profile data
3187 for (;;) {
3188 intptr_t profiled_k = parameters->type(k);
3189 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3190 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3191 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
3192 // If the profile is known statically set it once for all and do not emit any code
3193 if (exact != NULL) {
3194 md->set_parameter_type(k, exact);
3195 }
3196 k++;
3197 if (k >= parameters_type_data->number_of_parameters()) {
3198 #ifdef ASSERT
3199 int extra = 0;
3200 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3201 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3202 x->recv() != NULL && Bytecodes::has_receiver(bc)) {
3203 extra += 1;
3204 }
3205 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3206 #endif
3207 break;
3208 }
3209 arg = x->profiled_arg_at(i);
3210 not_null = !x->arg_needs_null_check(i);
3211 i++;
3212 }
3213 }
3214 }
3215 }
3216 }
3217
3218 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3219 // Need recv in a temporary register so it interferes with the other temporaries
3220 LIR_Opr recv = LIR_OprFact::illegalOpr;
3221 LIR_Opr mdo = new_register(T_METADATA);
3222 // tmp is used to hold the counters on SPARC
3223 LIR_Opr tmp = new_pointer_register();
3224
3225 if (x->nb_profiled_args() > 0) {
3226 profile_arguments(x);
3227 }
3228
3229 // profile parameters on inlined method entry including receiver
3230 if (x->recv() != NULL || x->nb_profiled_args() > 0) {
3231 profile_parameters_at_call(x);
3232 }
3233
3234 if (x->recv() != NULL) {
3235 LIRItem value(x->recv(), this);
3236 value.load_item();
3237 recv = new_register(T_OBJECT);
3238 __ move(value.result(), recv);
3239 }
3240 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3241 }
3242
3243 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
3244 int bci = x->bci_of_invoke();
3245 ciMethodData* md = x->method()->method_data_or_null();
3246 assert(md != NULL, "Sanity");
3247 ciProfileData* data = md->bci_to_data(bci);
3248 if (data != NULL) {
3249 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3250 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3251 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3252
3253 bool ignored_will_link;
3254 ciSignature* signature_at_call = NULL;
3255 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3256
3257 // The offset within the MDO of the entry to update may be too large
3258 // to be used in load/store instructions on some platforms. So have
3259 // profile_type() compute the address of the profile in a register.
3260 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3261 ret->type(), x->ret(), mdp,
3262 !x->needs_null_check(),
3263 signature_at_call->return_type()->as_klass(),
3264 x->callee()->signature()->return_type()->as_klass());
3265 if (exact != NULL) {
3266 md->set_return_type(bci, exact);
3267 }
3268 }
3269 }
3270
3271 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3272 // We can safely ignore accessors here, since c2 will inline them anyway,
3273 // accessors are also always mature.
3274 if (!x->inlinee()->is_accessor()) {
3275 CodeEmitInfo* info = state_for(x, x->state(), true);
3276 // Notify the runtime very infrequently only to take care of counter overflows
3277 int freq_log = Tier23InlineeNotifyFreqLog;
3278 double scale;
3279 if (_method->has_option_value("CompileThresholdScaling", scale)) {
3280 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3281 }
3282 increment_event_counter_impl(info, x->inlinee(), LIR_OprFact::intConst(InvocationCounter::count_increment), right_n_bits(freq_log), InvocationEntryBci, false, true);
3283 }
3284 }
3285
3286 void LIRGenerator::increment_backedge_counter_conditionally(LIR_Condition cond, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info, int left_bci, int right_bci, int bci) {
3287 if (compilation()->count_backedges()) {
3288 __ cmp(cond, left, right);
3289 LIR_Opr step = new_register(T_INT);
3290 LIR_Opr plus_one = LIR_OprFact::intConst(InvocationCounter::count_increment);
3291 LIR_Opr zero = LIR_OprFact::intConst(0);
3292 __ cmove(cond,
3293 (left_bci < bci) ? plus_one : zero,
3294 (right_bci < bci) ? plus_one : zero,
3295 step, left->type());
3296 increment_backedge_counter(info, step, bci);
3297 }
3298 }
3299
3300
3301 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge) {
3302 int freq_log = 0;
3303 int level = compilation()->env()->comp_level();
3304 if (level == CompLevel_limited_profile) {
3305 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3306 } else if (level == CompLevel_full_profile) {
3307 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3308 } else {
3309 ShouldNotReachHere();
3310 }
3311 // Increment the appropriate invocation/backedge counter and notify the runtime.
3312 double scale;
3313 if (_method->has_option_value("CompileThresholdScaling", scale)) {
3314 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3315 }
3316 increment_event_counter_impl(info, info->scope()->method(), step, right_n_bits(freq_log), bci, backedge, true);
3317 }
3318
3319 void LIRGenerator::decrement_age(CodeEmitInfo* info) {
3320 ciMethod* method = info->scope()->method();
3321 MethodCounters* mc_adr = method->ensure_method_counters();
3322 if (mc_adr != NULL) {
3323 LIR_Opr mc = new_pointer_register();
3324 __ move(LIR_OprFact::intptrConst(mc_adr), mc);
3325 int offset = in_bytes(MethodCounters::nmethod_age_offset());
3326 LIR_Address* counter = new LIR_Address(mc, offset, T_INT);
3327 LIR_Opr result = new_register(T_INT);
3328 __ load(counter, result);
3329 __ sub(result, LIR_OprFact::intConst(1), result);
3330 __ store(result, counter);
3331 // DeoptimizeStub will reexecute from the current state in code info.
3332 CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured,
3333 Deoptimization::Action_make_not_entrant);
3334 __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0));
3335 __ branch(lir_cond_lessEqual, T_INT, deopt);
3336 }
3337 }
3338
3339
3340 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3341 ciMethod *method, LIR_Opr step, int frequency,
3342 int bci, bool backedge, bool notify) {
3343 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3344 int level = _compilation->env()->comp_level();
3345 assert(level > CompLevel_simple, "Shouldn't be here");
3346
3347 int offset = -1;
3348 LIR_Opr counter_holder = NULL;
3349 if (level == CompLevel_limited_profile) {
3350 MethodCounters* counters_adr = method->ensure_method_counters();
3351 if (counters_adr == NULL) {
3352 bailout("method counters allocation failed");
3353 return;
3354 }
3355 counter_holder = new_pointer_register();
3356 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3357 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3358 MethodCounters::invocation_counter_offset());
3359 } else if (level == CompLevel_full_profile) {
3360 counter_holder = new_register(T_METADATA);
3361 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3362 MethodData::invocation_counter_offset());
3363 ciMethodData* md = method->method_data_or_null();
3364 assert(md != NULL, "Sanity");
3365 __ metadata2reg(md->constant_encoding(), counter_holder);
3366 } else {
3367 ShouldNotReachHere();
3368 }
3369 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3370 LIR_Opr result = new_register(T_INT);
3371 __ load(counter, result);
3372 __ add(result, step, result);
3373 __ store(result, counter);
3374 if (notify && (!backedge || UseOnStackReplacement)) {
3375 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding());
3376 // The bci for info can point to cmp for if's we want the if bci
3377 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3378 int freq = frequency << InvocationCounter::count_shift;
3379 if (freq == 0) {
3380 if (!step->is_constant()) {
3381 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3382 __ branch(lir_cond_notEqual, T_ILLEGAL, overflow);
3383 } else {
3384 __ branch(lir_cond_always, T_ILLEGAL, overflow);
3385 }
3386 } else {
3387 LIR_Opr mask = load_immediate(freq, T_INT);
3388 if (!step->is_constant()) {
3389 // If step is 0, make sure the overflow check below always fails
3390 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3391 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT);
3392 }
3393 __ logical_and(result, mask, result);
3394 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3395 __ branch(lir_cond_equal, T_INT, overflow);
3396 }
3397 __ branch_destination(overflow->continuation());
3398 }
3399 }
3400
3401 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3402 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3403 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3404
3405 if (x->pass_thread()) {
3406 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3407 args->append(getThreadPointer());
3408 }
3409
3410 for (int i = 0; i < x->number_of_arguments(); i++) {
3411 Value a = x->argument_at(i);
3412 LIRItem* item = new LIRItem(a, this);
3413 item->load_item();
3414 args->append(item->result());
3415 signature->append(as_BasicType(a->type()));
3416 }
3417
3418 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL);
3419 if (x->type() == voidType) {
3420 set_no_result(x);
3421 } else {
3422 __ move(result, rlock_result(x));
3423 }
3424 }
3425
3426 #ifdef ASSERT
3427 void LIRGenerator::do_Assert(Assert *x) {
3428 ValueTag tag = x->x()->type()->tag();
3429 If::Condition cond = x->cond();
3430
3431 LIRItem xitem(x->x(), this);
3432 LIRItem yitem(x->y(), this);
3433 LIRItem* xin = &xitem;
3434 LIRItem* yin = &yitem;
3435
3436 assert(tag == intTag, "Only integer assertions are valid!");
3437
3438 xin->load_item();
3439 yin->dont_load_item();
3440
3441 set_no_result(x);
3442
3443 LIR_Opr left = xin->result();
3444 LIR_Opr right = yin->result();
3445
3446 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3447 }
3448 #endif
3449
3450 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3451
3452
3453 Instruction *a = x->x();
3454 Instruction *b = x->y();
3455 if (!a || StressRangeCheckElimination) {
3456 assert(!b || StressRangeCheckElimination, "B must also be null");
3457
3458 CodeEmitInfo *info = state_for(x, x->state());
3459 CodeStub* stub = new PredicateFailedStub(info);
3460
3461 __ jump(stub);
3462 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3463 int a_int = a->type()->as_IntConstant()->value();
3464 int b_int = b->type()->as_IntConstant()->value();
3465
3466 bool ok = false;
3467
3468 switch(x->cond()) {
3469 case Instruction::eql: ok = (a_int == b_int); break;
3470 case Instruction::neq: ok = (a_int != b_int); break;
3471 case Instruction::lss: ok = (a_int < b_int); break;
3472 case Instruction::leq: ok = (a_int <= b_int); break;
3473 case Instruction::gtr: ok = (a_int > b_int); break;
3474 case Instruction::geq: ok = (a_int >= b_int); break;
3475 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3476 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3477 default: ShouldNotReachHere();
3478 }
3479
3480 if (ok) {
3481
3482 CodeEmitInfo *info = state_for(x, x->state());
3483 CodeStub* stub = new PredicateFailedStub(info);
3484
3485 __ jump(stub);
3486 }
3487 } else {
3488
3489 ValueTag tag = x->x()->type()->tag();
3490 If::Condition cond = x->cond();
3491 LIRItem xitem(x->x(), this);
3492 LIRItem yitem(x->y(), this);
3493 LIRItem* xin = &xitem;
3494 LIRItem* yin = &yitem;
3495
3496 assert(tag == intTag, "Only integer deoptimizations are valid!");
3497
3498 xin->load_item();
3499 yin->dont_load_item();
3500 set_no_result(x);
3501
3502 LIR_Opr left = xin->result();
3503 LIR_Opr right = yin->result();
3504
3505 CodeEmitInfo *info = state_for(x, x->state());
3506 CodeStub* stub = new PredicateFailedStub(info);
3507
3508 __ cmp(lir_cond(cond), left, right);
3509 __ branch(lir_cond(cond), right->type(), stub);
3510 }
3511 }
3512
3513
3514 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3515 LIRItemList args(1);
3516 LIRItem value(arg1, this);
3517 args.append(&value);
3518 BasicTypeList signature;
3519 signature.append(as_BasicType(arg1->type()));
3520
3521 return call_runtime(&signature, &args, entry, result_type, info);
3522 }
3523
3524
3525 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3526 LIRItemList args(2);
3527 LIRItem value1(arg1, this);
3528 LIRItem value2(arg2, this);
3529 args.append(&value1);
3530 args.append(&value2);
3531 BasicTypeList signature;
3532 signature.append(as_BasicType(arg1->type()));
3533 signature.append(as_BasicType(arg2->type()));
3534
3535 return call_runtime(&signature, &args, entry, result_type, info);
3536 }
3537
3538
3539 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3540 address entry, ValueType* result_type, CodeEmitInfo* info) {
3541 // get a result register
3542 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3543 LIR_Opr result = LIR_OprFact::illegalOpr;
3544 if (result_type->tag() != voidTag) {
3545 result = new_register(result_type);
3546 phys_reg = result_register_for(result_type);
3547 }
3548
3549 // move the arguments into the correct location
3550 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3551 assert(cc->length() == args->length(), "argument mismatch");
3552 for (int i = 0; i < args->length(); i++) {
3553 LIR_Opr arg = args->at(i);
3554 LIR_Opr loc = cc->at(i);
3555 if (loc->is_register()) {
3556 __ move(arg, loc);
3557 } else {
3558 LIR_Address* addr = loc->as_address_ptr();
3559 // if (!can_store_as_constant(arg)) {
3560 // LIR_Opr tmp = new_register(arg->type());
3561 // __ move(arg, tmp);
3562 // arg = tmp;
3563 // }
3564 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3565 __ unaligned_move(arg, addr);
3566 } else {
3567 __ move(arg, addr);
3568 }
3569 }
3570 }
3571
3572 if (info) {
3573 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3574 } else {
3575 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3576 }
3577 if (result->is_valid()) {
3578 __ move(phys_reg, result);
3579 }
3580 return result;
3581 }
3582
3583
3584 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3585 address entry, ValueType* result_type, CodeEmitInfo* info) {
3586 // get a result register
3587 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3588 LIR_Opr result = LIR_OprFact::illegalOpr;
3589 if (result_type->tag() != voidTag) {
3590 result = new_register(result_type);
3591 phys_reg = result_register_for(result_type);
3592 }
3593
3594 // move the arguments into the correct location
3595 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3596
3597 assert(cc->length() == args->length(), "argument mismatch");
3598 for (int i = 0; i < args->length(); i++) {
3599 LIRItem* arg = args->at(i);
3600 LIR_Opr loc = cc->at(i);
3601 if (loc->is_register()) {
3602 arg->load_item_force(loc);
3603 } else {
3604 LIR_Address* addr = loc->as_address_ptr();
3605 arg->load_for_store(addr->type());
3606 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3607 __ unaligned_move(arg->result(), addr);
3608 } else {
3609 __ move(arg->result(), addr);
3610 }
3611 }
3612 }
3613
3614 if (info) {
3615 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3616 } else {
3617 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3618 }
3619 if (result->is_valid()) {
3620 __ move(phys_reg, result);
3621 }
3622 return result;
3623 }
3624
3625 void LIRGenerator::do_MemBar(MemBar* x) {
3626 if (os::is_MP()) {
3627 LIR_Code code = x->code();
3628 switch(code) {
3629 case lir_membar_acquire : __ membar_acquire(); break;
3630 case lir_membar_release : __ membar_release(); break;
3631 case lir_membar : __ membar(); break;
3632 case lir_membar_loadload : __ membar_loadload(); break;
3633 case lir_membar_storestore: __ membar_storestore(); break;
3634 case lir_membar_loadstore : __ membar_loadstore(); break;
3635 case lir_membar_storeload : __ membar_storeload(); break;
3636 default : ShouldNotReachHere(); break;
3637 }
3638 }
3639 }
3640
3641 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3642 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3643 if (TwoOperandLIRForm) {
3644 __ move(value, value_fixed);
3645 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3646 } else {
3647 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3648 }
3649 LIR_Opr klass = new_register(T_METADATA);
3650 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
3651 null_check_info = NULL;
3652 LIR_Opr layout = new_register(T_INT);
3653 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3654 int diffbit = Klass::layout_helper_boolean_diffbit();
3655 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3656 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3657 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3658 value = value_fixed;
3659 return value;
3660 }
3661
3662 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3663 if (x->check_boolean()) {
3664 value = mask_boolean(array, value, null_check_info);
3665 }
3666 return value;
3667 }