1 /*
2 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Defs.hpp"
27 #include "c1/c1_Compilation.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_Instruction.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_LIRGenerator.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "ci/ciObjArray.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38 #include "utilities/bitMap.inline.hpp"
39 #include "utilities/macros.hpp"
40 #if INCLUDE_ALL_GCS
41 #include "gc_implementation/g1/heapRegion.hpp"
42 #endif // INCLUDE_ALL_GCS
43
44 #ifdef ASSERT
45 #define __ gen()->lir(__FILE__, __LINE__)->
46 #else
47 #define __ gen()->lir()->
48 #endif
49
50 #ifndef PATCHED_ADDR
51 #define PATCHED_ADDR (max_jint)
52 #endif
53
54 void PhiResolverState::reset(int max_vregs) {
55 // Initialize array sizes
56 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL);
57 _virtual_operands.trunc_to(0);
58 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL);
59 _other_operands.trunc_to(0);
60 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL);
61 _vreg_table.trunc_to(0);
62 }
63
64
65
66 //--------------------------------------------------------------
67 // PhiResolver
68
69 // Resolves cycles:
70 //
71 // r1 := r2 becomes temp := r1
72 // r2 := r1 r1 := r2
73 // r2 := temp
74 // and orders moves:
75 //
76 // r2 := r3 becomes r1 := r2
77 // r1 := r2 r2 := r3
78
79 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs)
80 : _gen(gen)
81 , _state(gen->resolver_state())
82 , _temp(LIR_OprFact::illegalOpr)
83 {
84 // reinitialize the shared state arrays
85 _state.reset(max_vregs);
86 }
87
88
89 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
90 assert(src->is_valid(), "");
91 assert(dest->is_valid(), "");
92 __ move(src, dest);
93 }
94
95
96 void PhiResolver::move_temp_to(LIR_Opr dest) {
97 assert(_temp->is_valid(), "");
98 emit_move(_temp, dest);
99 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
100 }
101
102
103 void PhiResolver::move_to_temp(LIR_Opr src) {
104 assert(_temp->is_illegal(), "");
105 _temp = _gen->new_register(src->type());
106 emit_move(src, _temp);
107 }
108
109
110 // Traverse assignment graph in depth first order and generate moves in post order
111 // ie. two assignments: b := c, a := b start with node c:
112 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a)
113 // Generates moves in this order: move b to a and move c to b
114 // ie. cycle a := b, b := a start with node a
115 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a)
116 // Generates moves in this order: move b to temp, move a to b, move temp to a
117 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
118 if (!dest->visited()) {
119 dest->set_visited();
120 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
121 move(dest, dest->destination_at(i));
122 }
123 } else if (!dest->start_node()) {
124 // cylce in graph detected
125 assert(_loop == NULL, "only one loop valid!");
126 _loop = dest;
127 move_to_temp(src->operand());
128 return;
129 } // else dest is a start node
130
131 if (!dest->assigned()) {
132 if (_loop == dest) {
133 move_temp_to(dest->operand());
134 dest->set_assigned();
135 } else if (src != NULL) {
136 emit_move(src->operand(), dest->operand());
137 dest->set_assigned();
138 }
139 }
140 }
141
142
143 PhiResolver::~PhiResolver() {
144 int i;
145 // resolve any cycles in moves from and to virtual registers
146 for (i = virtual_operands().length() - 1; i >= 0; i --) {
147 ResolveNode* node = virtual_operands()[i];
148 if (!node->visited()) {
149 _loop = NULL;
150 move(NULL, node);
151 node->set_start_node();
152 assert(_temp->is_illegal(), "move_temp_to() call missing");
153 }
154 }
155
156 // generate move for move from non virtual register to abitrary destination
157 for (i = other_operands().length() - 1; i >= 0; i --) {
158 ResolveNode* node = other_operands()[i];
159 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
160 emit_move(node->operand(), node->destination_at(j)->operand());
161 }
162 }
163 }
164
165
166 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
167 ResolveNode* node;
168 if (opr->is_virtual()) {
169 int vreg_num = opr->vreg_number();
170 node = vreg_table().at_grow(vreg_num, NULL);
171 assert(node == NULL || node->operand() == opr, "");
172 if (node == NULL) {
173 node = new ResolveNode(opr);
174 vreg_table()[vreg_num] = node;
175 }
176 // Make sure that all virtual operands show up in the list when
177 // they are used as the source of a move.
178 if (source && !virtual_operands().contains(node)) {
179 virtual_operands().append(node);
180 }
181 } else {
182 assert(source, "");
183 node = new ResolveNode(opr);
184 other_operands().append(node);
185 }
186 return node;
187 }
188
189
190 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
191 assert(dest->is_virtual(), "");
192 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
193 assert(src->is_valid(), "");
194 assert(dest->is_valid(), "");
195 ResolveNode* source = source_node(src);
196 source->append(destination_node(dest));
197 }
198
199
200 //--------------------------------------------------------------
201 // LIRItem
202
203 void LIRItem::set_result(LIR_Opr opr) {
204 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
205 value()->set_operand(opr);
206
207 if (opr->is_virtual()) {
208 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL);
209 }
210
211 _result = opr;
212 }
213
214 void LIRItem::load_item() {
215 if (result()->is_illegal()) {
216 // update the items result
217 _result = value()->operand();
218 }
219 if (!result()->is_register()) {
220 LIR_Opr reg = _gen->new_register(value()->type());
221 __ move(result(), reg);
222 if (result()->is_constant()) {
223 _result = reg;
224 } else {
225 set_result(reg);
226 }
227 }
228 }
229
230
231 void LIRItem::load_for_store(BasicType type) {
232 if (_gen->can_store_as_constant(value(), type)) {
233 _result = value()->operand();
234 if (!_result->is_constant()) {
235 _result = LIR_OprFact::value_type(value()->type());
236 }
237 } else if (type == T_BYTE || type == T_BOOLEAN) {
238 load_byte_item();
239 } else {
240 load_item();
241 }
242 }
243
244 void LIRItem::load_item_force(LIR_Opr reg) {
245 LIR_Opr r = result();
246 if (r != reg) {
247 #if !defined(ARM) && !defined(E500V2)
248 if (r->type() != reg->type()) {
249 // moves between different types need an intervening spill slot
250 r = _gen->force_to_spill(r, reg->type());
251 }
252 #endif
253 __ move(r, reg);
254 _result = reg;
255 }
256 }
257
258 ciObject* LIRItem::get_jobject_constant() const {
259 ObjectType* oc = type()->as_ObjectType();
260 if (oc) {
261 return oc->constant_value();
262 }
263 return NULL;
264 }
265
266
267 jint LIRItem::get_jint_constant() const {
268 assert(is_constant() && value() != NULL, "");
269 assert(type()->as_IntConstant() != NULL, "type check");
270 return type()->as_IntConstant()->value();
271 }
272
273
274 jint LIRItem::get_address_constant() const {
275 assert(is_constant() && value() != NULL, "");
276 assert(type()->as_AddressConstant() != NULL, "type check");
277 return type()->as_AddressConstant()->value();
278 }
279
280
281 jfloat LIRItem::get_jfloat_constant() const {
282 assert(is_constant() && value() != NULL, "");
283 assert(type()->as_FloatConstant() != NULL, "type check");
284 return type()->as_FloatConstant()->value();
285 }
286
287
288 jdouble LIRItem::get_jdouble_constant() const {
289 assert(is_constant() && value() != NULL, "");
290 assert(type()->as_DoubleConstant() != NULL, "type check");
291 return type()->as_DoubleConstant()->value();
292 }
293
294
295 jlong LIRItem::get_jlong_constant() const {
296 assert(is_constant() && value() != NULL, "");
297 assert(type()->as_LongConstant() != NULL, "type check");
298 return type()->as_LongConstant()->value();
299 }
300
301
302
303 //--------------------------------------------------------------
304
305
306 void LIRGenerator::init() {
307 _bs = Universe::heap()->barrier_set();
308 }
309
310
311 void LIRGenerator::block_do_prolog(BlockBegin* block) {
312 #ifndef PRODUCT
313 if (PrintIRWithLIR) {
314 block->print();
315 }
316 #endif
317
318 // set up the list of LIR instructions
319 assert(block->lir() == NULL, "LIR list already computed for this block");
320 _lir = new LIR_List(compilation(), block);
321 block->set_lir(_lir);
322
323 __ branch_destination(block->label());
324
325 if (LIRTraceExecution &&
326 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
327 !block->is_set(BlockBegin::exception_entry_flag)) {
328 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
329 trace_block_entry(block);
330 }
331 }
332
333
334 void LIRGenerator::block_do_epilog(BlockBegin* block) {
335 #ifndef PRODUCT
336 if (PrintIRWithLIR) {
337 tty->cr();
338 }
339 #endif
340
341 // LIR_Opr for unpinned constants shouldn't be referenced by other
342 // blocks so clear them out after processing the block.
343 for (int i = 0; i < _unpinned_constants.length(); i++) {
344 _unpinned_constants.at(i)->clear_operand();
345 }
346 _unpinned_constants.trunc_to(0);
347
348 // clear our any registers for other local constants
349 _constants.trunc_to(0);
350 _reg_for_constants.trunc_to(0);
351 }
352
353
354 void LIRGenerator::block_do(BlockBegin* block) {
355 CHECK_BAILOUT();
356
357 block_do_prolog(block);
358 set_block(block);
359
360 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
361 if (instr->is_pinned()) do_root(instr);
362 }
363
364 set_block(NULL);
365 block_do_epilog(block);
366 }
367
368
369 //-------------------------LIRGenerator-----------------------------
370
371 // This is where the tree-walk starts; instr must be root;
372 void LIRGenerator::do_root(Value instr) {
373 CHECK_BAILOUT();
374
375 InstructionMark im(compilation(), instr);
376
377 assert(instr->is_pinned(), "use only with roots");
378 assert(instr->subst() == instr, "shouldn't have missed substitution");
379
380 instr->visit(this);
381
382 assert(!instr->has_uses() || instr->operand()->is_valid() ||
383 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
384 }
385
386
387 // This is called for each node in tree; the walk stops if a root is reached
388 void LIRGenerator::walk(Value instr) {
389 InstructionMark im(compilation(), instr);
390 //stop walk when encounter a root
391 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) {
392 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
393 } else {
394 assert(instr->subst() == instr, "shouldn't have missed substitution");
395 instr->visit(this);
396 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
397 }
398 }
399
400
401 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
402 assert(state != NULL, "state must be defined");
403
404 #ifndef PRODUCT
405 state->verify();
406 #endif
407
408 ValueStack* s = state;
409 for_each_state(s) {
410 if (s->kind() == ValueStack::EmptyExceptionState) {
411 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty");
412 continue;
413 }
414
415 int index;
416 Value value;
417 for_each_stack_value(s, index, value) {
418 assert(value->subst() == value, "missed substitution");
419 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
420 walk(value);
421 assert(value->operand()->is_valid(), "must be evaluated now");
422 }
423 }
424
425 int bci = s->bci();
426 IRScope* scope = s->scope();
427 ciMethod* method = scope->method();
428
429 MethodLivenessResult liveness = method->liveness_at_bci(bci);
430 if (bci == SynchronizationEntryBCI) {
431 if (x->as_ExceptionObject() || x->as_Throw()) {
432 // all locals are dead on exit from the synthetic unlocker
433 liveness.clear();
434 } else {
435 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
436 }
437 }
438 if (!liveness.is_valid()) {
439 // Degenerate or breakpointed method.
440 bailout("Degenerate or breakpointed method");
441 } else {
442 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
443 for_each_local_value(s, index, value) {
444 assert(value->subst() == value, "missed substition");
445 if (liveness.at(index) && !value->type()->is_illegal()) {
446 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
447 walk(value);
448 assert(value->operand()->is_valid(), "must be evaluated now");
449 }
450 } else {
451 // NULL out this local so that linear scan can assume that all non-NULL values are live.
452 s->invalidate_local(index);
453 }
454 }
455 }
456 }
457
458 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
459 }
460
461
462 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
463 return state_for(x, x->exception_state());
464 }
465
466
467 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
468 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation
469 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
470 * the class. */
471 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) {
472 assert(info != NULL, "info must be set if class is not loaded");
473 __ klass2reg_patch(NULL, r, info);
474 } else {
475 // no patching needed
476 __ metadata2reg(obj->constant_encoding(), r);
477 }
478 }
479
480
481 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
482 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
483 CodeStub* stub = new RangeCheckStub(range_check_info, index);
484 if (index->is_constant()) {
485 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
486 index->as_jint(), null_check_info);
487 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
488 } else {
489 cmp_reg_mem(lir_cond_aboveEqual, index, array,
490 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
491 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
492 }
493 }
494
495
496 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
497 CodeStub* stub = new RangeCheckStub(info, index, true);
498 if (index->is_constant()) {
499 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
500 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
501 } else {
502 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
503 java_nio_Buffer::limit_offset(), T_INT, info);
504 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
505 }
506 __ move(index, result);
507 }
508
509
510
511 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) {
512 LIR_Opr result_op = result;
513 LIR_Opr left_op = left;
514 LIR_Opr right_op = right;
515
516 if (TwoOperandLIRForm && left_op != result_op) {
517 assert(right_op != result_op, "malformed");
518 __ move(left_op, result_op);
519 left_op = result_op;
520 }
521
522 switch(code) {
523 case Bytecodes::_dadd:
524 case Bytecodes::_fadd:
525 case Bytecodes::_ladd:
526 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
527 case Bytecodes::_fmul:
528 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
529
530 case Bytecodes::_dmul:
531 {
532 if (is_strictfp) {
533 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break;
534 } else {
535 __ mul(left_op, right_op, result_op); break;
536 }
537 }
538 break;
539
540 case Bytecodes::_imul:
541 {
542 bool did_strength_reduce = false;
543
544 if (right->is_constant()) {
545 int c = right->as_jint();
546 if (is_power_of_2(c)) {
547 // do not need tmp here
548 __ shift_left(left_op, exact_log2(c), result_op);
549 did_strength_reduce = true;
550 } else {
551 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
552 }
553 }
554 // we couldn't strength reduce so just emit the multiply
555 if (!did_strength_reduce) {
556 __ mul(left_op, right_op, result_op);
557 }
558 }
559 break;
560
561 case Bytecodes::_dsub:
562 case Bytecodes::_fsub:
563 case Bytecodes::_lsub:
564 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
565
566 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
567 // ldiv and lrem are implemented with a direct runtime call
568
569 case Bytecodes::_ddiv:
570 {
571 if (is_strictfp) {
572 __ div_strictfp (left_op, right_op, result_op, tmp_op); break;
573 } else {
574 __ div (left_op, right_op, result_op); break;
575 }
576 }
577 break;
578
579 case Bytecodes::_drem:
580 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
581
582 default: ShouldNotReachHere();
583 }
584 }
585
586
587 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
588 arithmetic_op(code, result, left, right, false, tmp);
589 }
590
591
592 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
593 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info);
594 }
595
596
597 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) {
598 arithmetic_op(code, result, left, right, is_strictfp, tmp);
599 }
600
601
602 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
603 if (TwoOperandLIRForm && value != result_op) {
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 err_msg_res("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 LIR_Opr operand = cur_val->operand();
997 if (cur_val->operand()->is_illegal()) {
998 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
999 "these can be produced lazily");
1000 operand = operand_for_instruction(cur_val);
1001 }
1002 resolver->move(operand, operand_for_instruction(phi));
1003 }
1004 }
1005
1006
1007 // Moves all stack values into their PHI position
1008 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1009 BlockBegin* bb = block();
1010 if (bb->number_of_sux() == 1) {
1011 BlockBegin* sux = bb->sux_at(0);
1012 assert(sux->number_of_preds() > 0, "invalid CFG");
1013
1014 // a block with only one predecessor never has phi functions
1015 if (sux->number_of_preds() > 1) {
1016 int max_phis = cur_state->stack_size() + cur_state->locals_size();
1017 PhiResolver resolver(this, _virtual_register_number + max_phis * 2);
1018
1019 ValueStack* sux_state = sux->state();
1020 Value sux_value;
1021 int index;
1022
1023 assert(cur_state->scope() == sux_state->scope(), "not matching");
1024 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1025 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1026
1027 for_each_stack_value(sux_state, index, sux_value) {
1028 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1029 }
1030
1031 for_each_local_value(sux_state, index, sux_value) {
1032 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1033 }
1034
1035 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1036 }
1037 }
1038 }
1039
1040
1041 LIR_Opr LIRGenerator::new_register(BasicType type) {
1042 int vreg = _virtual_register_number;
1043 // add a little fudge factor for the bailout, since the bailout is
1044 // only checked periodically. This gives a few extra registers to
1045 // hand out before we really run out, which helps us keep from
1046 // tripping over assertions.
1047 if (vreg + 20 >= LIR_OprDesc::vreg_max) {
1048 bailout("out of virtual registers");
1049 if (vreg + 2 >= LIR_OprDesc::vreg_max) {
1050 // wrap it around
1051 _virtual_register_number = LIR_OprDesc::vreg_base;
1052 }
1053 }
1054 _virtual_register_number += 1;
1055 return LIR_OprFact::virtual_register(vreg, type);
1056 }
1057
1058
1059 // Try to lock using register in hint
1060 LIR_Opr LIRGenerator::rlock(Value instr) {
1061 return new_register(instr->type());
1062 }
1063
1064
1065 // does an rlock and sets result
1066 LIR_Opr LIRGenerator::rlock_result(Value x) {
1067 LIR_Opr reg = rlock(x);
1068 set_result(x, reg);
1069 return reg;
1070 }
1071
1072
1073 // does an rlock and sets result
1074 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1075 LIR_Opr reg;
1076 switch (type) {
1077 case T_BYTE:
1078 case T_BOOLEAN:
1079 reg = rlock_byte(type);
1080 break;
1081 default:
1082 reg = rlock(x);
1083 break;
1084 }
1085
1086 set_result(x, reg);
1087 return reg;
1088 }
1089
1090
1091 //---------------------------------------------------------------------
1092 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1093 ObjectType* oc = value->type()->as_ObjectType();
1094 if (oc) {
1095 return oc->constant_value();
1096 }
1097 return NULL;
1098 }
1099
1100
1101 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1102 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1103 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1104
1105 // no moves are created for phi functions at the begin of exception
1106 // handlers, so assign operands manually here
1107 for_each_phi_fun(block(), phi,
1108 operand_for_instruction(phi));
1109
1110 LIR_Opr thread_reg = getThreadPointer();
1111 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1112 exceptionOopOpr());
1113 __ move_wide(LIR_OprFact::oopConst(NULL),
1114 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1115 __ move_wide(LIR_OprFact::oopConst(NULL),
1116 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1117
1118 LIR_Opr result = new_register(T_OBJECT);
1119 __ move(exceptionOopOpr(), result);
1120 set_result(x, result);
1121 }
1122
1123
1124 //----------------------------------------------------------------------
1125 //----------------------------------------------------------------------
1126 //----------------------------------------------------------------------
1127 //----------------------------------------------------------------------
1128 // visitor functions
1129 //----------------------------------------------------------------------
1130 //----------------------------------------------------------------------
1131 //----------------------------------------------------------------------
1132 //----------------------------------------------------------------------
1133
1134 void LIRGenerator::do_Phi(Phi* x) {
1135 // phi functions are never visited directly
1136 ShouldNotReachHere();
1137 }
1138
1139
1140 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1141 void LIRGenerator::do_Constant(Constant* x) {
1142 if (x->state_before() != NULL) {
1143 // Any constant with a ValueStack requires patching so emit the patch here
1144 LIR_Opr reg = rlock_result(x);
1145 CodeEmitInfo* info = state_for(x, x->state_before());
1146 __ oop2reg_patch(NULL, reg, info);
1147 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1148 if (!x->is_pinned()) {
1149 // unpinned constants are handled specially so that they can be
1150 // put into registers when they are used multiple times within a
1151 // block. After the block completes their operand will be
1152 // cleared so that other blocks can't refer to that register.
1153 set_result(x, load_constant(x));
1154 } else {
1155 LIR_Opr res = x->operand();
1156 if (!res->is_valid()) {
1157 res = LIR_OprFact::value_type(x->type());
1158 }
1159 if (res->is_constant()) {
1160 LIR_Opr reg = rlock_result(x);
1161 __ move(res, reg);
1162 } else {
1163 set_result(x, res);
1164 }
1165 }
1166 } else {
1167 set_result(x, LIR_OprFact::value_type(x->type()));
1168 }
1169 }
1170
1171
1172 void LIRGenerator::do_Local(Local* x) {
1173 // operand_for_instruction has the side effect of setting the result
1174 // so there's no need to do it here.
1175 operand_for_instruction(x);
1176 }
1177
1178
1179 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) {
1180 Unimplemented();
1181 }
1182
1183
1184 void LIRGenerator::do_Return(Return* x) {
1185 if (compilation()->env()->dtrace_method_probes()) {
1186 BasicTypeList signature;
1187 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1188 signature.append(T_METADATA); // Method*
1189 LIR_OprList* args = new LIR_OprList();
1190 args->append(getThreadPointer());
1191 LIR_Opr meth = new_register(T_METADATA);
1192 __ metadata2reg(method()->constant_encoding(), meth);
1193 args->append(meth);
1194 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
1195 }
1196
1197 if (x->type()->is_void()) {
1198 __ return_op(LIR_OprFact::illegalOpr);
1199 } else {
1200 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1201 LIRItem result(x->result(), this);
1202
1203 result.load_item_force(reg);
1204 __ return_op(result.result());
1205 }
1206 set_no_result(x);
1207 }
1208
1209 // Examble: ref.get()
1210 // Combination of LoadField and g1 pre-write barrier
1211 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1212
1213 const int referent_offset = java_lang_ref_Reference::referent_offset;
1214 guarantee(referent_offset > 0, "referent offset not initialized");
1215
1216 assert(x->number_of_arguments() == 1, "wrong type");
1217
1218 LIRItem reference(x->argument_at(0), this);
1219 reference.load_item();
1220
1221 // need to perform the null check on the reference objecy
1222 CodeEmitInfo* info = NULL;
1223 if (x->needs_null_check()) {
1224 info = state_for(x);
1225 }
1226
1227 LIR_Address* referent_field_adr =
1228 new LIR_Address(reference.result(), referent_offset, T_OBJECT);
1229
1230 LIR_Opr result = rlock_result(x);
1231
1232 __ load(referent_field_adr, result, info);
1233
1234 // Register the value in the referent field with the pre-barrier
1235 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */,
1236 result /* pre_val */,
1237 false /* do_load */,
1238 false /* patch */,
1239 NULL /* info */);
1240 }
1241
1242 // Example: clazz.isInstance(object)
1243 void LIRGenerator::do_isInstance(Intrinsic* x) {
1244 assert(x->number_of_arguments() == 2, "wrong type");
1245
1246 // TODO could try to substitute this node with an equivalent InstanceOf
1247 // if clazz is known to be a constant Class. This will pick up newly found
1248 // constants after HIR construction. I'll leave this to a future change.
1249
1250 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1251 // could follow the aastore example in a future change.
1252
1253 LIRItem clazz(x->argument_at(0), this);
1254 LIRItem object(x->argument_at(1), this);
1255 clazz.load_item();
1256 object.load_item();
1257 LIR_Opr result = rlock_result(x);
1258
1259 // need to perform null check on clazz
1260 if (x->needs_null_check()) {
1261 CodeEmitInfo* info = state_for(x);
1262 __ null_check(clazz.result(), info);
1263 }
1264
1265 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1266 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1267 x->type(),
1268 NULL); // NULL CodeEmitInfo results in a leaf call
1269 __ move(call_result, result);
1270 }
1271
1272 // Example: object.getClass ()
1273 void LIRGenerator::do_getClass(Intrinsic* x) {
1274 assert(x->number_of_arguments() == 1, "wrong type");
1275
1276 LIRItem rcvr(x->argument_at(0), this);
1277 rcvr.load_item();
1278 LIR_Opr temp = new_register(T_METADATA);
1279 LIR_Opr result = rlock_result(x);
1280
1281 // need to perform the null check on the rcvr
1282 CodeEmitInfo* info = NULL;
1283 if (x->needs_null_check()) {
1284 info = state_for(x);
1285 }
1286
1287 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
1288 // meaning of these two is mixed up (see JDK-8026837).
1289 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1290 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result);
1291 }
1292
1293
1294 // Example: Thread.currentThread()
1295 void LIRGenerator::do_currentThread(Intrinsic* x) {
1296 assert(x->number_of_arguments() == 0, "wrong type");
1297 LIR_Opr reg = rlock_result(x);
1298 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg);
1299 }
1300
1301
1302 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1303 assert(x->number_of_arguments() == 1, "wrong type");
1304 LIRItem receiver(x->argument_at(0), this);
1305
1306 receiver.load_item();
1307 BasicTypeList signature;
1308 signature.append(T_OBJECT); // receiver
1309 LIR_OprList* args = new LIR_OprList();
1310 args->append(receiver.result());
1311 CodeEmitInfo* info = state_for(x, x->state());
1312 call_runtime(&signature, args,
1313 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1314 voidType, info);
1315
1316 set_no_result(x);
1317 }
1318
1319
1320 //------------------------local access--------------------------------------
1321
1322 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1323 if (x->operand()->is_illegal()) {
1324 Constant* c = x->as_Constant();
1325 if (c != NULL) {
1326 x->set_operand(LIR_OprFact::value_type(c->type()));
1327 } else {
1328 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
1329 // allocate a virtual register for this local or phi
1330 x->set_operand(rlock(x));
1331 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
1332 }
1333 }
1334 return x->operand();
1335 }
1336
1337
1338 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
1339 if (opr->is_virtual()) {
1340 return instruction_for_vreg(opr->vreg_number());
1341 }
1342 return NULL;
1343 }
1344
1345
1346 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1347 if (reg_num < _instruction_for_operand.length()) {
1348 return _instruction_for_operand.at(reg_num);
1349 }
1350 return NULL;
1351 }
1352
1353
1354 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1355 if (_vreg_flags.size_in_bits() == 0) {
1356 BitMap2D temp(100, num_vreg_flags);
1357 temp.clear();
1358 _vreg_flags = temp;
1359 }
1360 _vreg_flags.at_put_grow(vreg_num, f, true);
1361 }
1362
1363 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1364 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1365 return false;
1366 }
1367 return _vreg_flags.at(vreg_num, f);
1368 }
1369
1370
1371 // Block local constant handling. This code is useful for keeping
1372 // unpinned constants and constants which aren't exposed in the IR in
1373 // registers. Unpinned Constant instructions have their operands
1374 // cleared when the block is finished so that other blocks can't end
1375 // up referring to their registers.
1376
1377 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1378 assert(!x->is_pinned(), "only for unpinned constants");
1379 _unpinned_constants.append(x);
1380 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1381 }
1382
1383
1384 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1385 BasicType t = c->type();
1386 for (int i = 0; i < _constants.length(); i++) {
1387 LIR_Const* other = _constants.at(i);
1388 if (t == other->type()) {
1389 switch (t) {
1390 case T_INT:
1391 case T_FLOAT:
1392 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1393 break;
1394 case T_LONG:
1395 case T_DOUBLE:
1396 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1397 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1398 break;
1399 case T_OBJECT:
1400 if (c->as_jobject() != other->as_jobject()) continue;
1401 break;
1402 }
1403 return _reg_for_constants.at(i);
1404 }
1405 }
1406
1407 LIR_Opr result = new_register(t);
1408 __ move((LIR_Opr)c, result);
1409 _constants.append(c);
1410 _reg_for_constants.append(result);
1411 return result;
1412 }
1413
1414 // Various barriers
1415
1416 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
1417 bool do_load, bool patch, CodeEmitInfo* info) {
1418 // Do the pre-write barrier, if any.
1419 switch (_bs->kind()) {
1420 #if INCLUDE_ALL_GCS
1421 case BarrierSet::G1SATBCT:
1422 case BarrierSet::G1SATBCTLogging:
1423 G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info);
1424 break;
1425 #endif // INCLUDE_ALL_GCS
1426 case BarrierSet::CardTableModRef:
1427 case BarrierSet::CardTableExtension:
1428 // No pre barriers
1429 break;
1430 case BarrierSet::ModRef:
1431 case BarrierSet::Epsilon:
1432 case BarrierSet::Other:
1433 // No pre barriers
1434 break;
1435 default :
1436 ShouldNotReachHere();
1437
1438 }
1439 }
1440
1441 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1442 switch (_bs->kind()) {
1443 #if INCLUDE_ALL_GCS
1444 case BarrierSet::G1SATBCT:
1445 case BarrierSet::G1SATBCTLogging:
1446 G1SATBCardTableModRef_post_barrier(addr, new_val);
1447 break;
1448 #endif // INCLUDE_ALL_GCS
1449 case BarrierSet::CardTableModRef:
1450 case BarrierSet::CardTableExtension:
1451 CardTableModRef_post_barrier(addr, new_val);
1452 break;
1453 case BarrierSet::ModRef:
1454 case BarrierSet::Epsilon:
1455 case BarrierSet::Other:
1456 // No post barriers
1457 break;
1458 default :
1459 ShouldNotReachHere();
1460 }
1461 }
1462
1463 ////////////////////////////////////////////////////////////////////////
1464 #if INCLUDE_ALL_GCS
1465
1466 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
1467 bool do_load, bool patch, CodeEmitInfo* info) {
1468 // First we test whether marking is in progress.
1469 BasicType flag_type;
1470 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
1471 flag_type = T_INT;
1472 } else {
1473 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1,
1474 "Assumption");
1475 flag_type = T_BYTE;
1476 }
1477 LIR_Opr thrd = getThreadPointer();
1478 LIR_Address* mark_active_flag_addr =
1479 new LIR_Address(thrd,
1480 in_bytes(JavaThread::satb_mark_queue_offset() +
1481 PtrQueue::byte_offset_of_active()),
1482 flag_type);
1483 // Read the marking-in-progress flag.
1484 LIR_Opr flag_val = new_register(T_INT);
1485 __ load(mark_active_flag_addr, flag_val);
1486 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0));
1487
1488 LIR_PatchCode pre_val_patch_code = lir_patch_none;
1489
1490 CodeStub* slow;
1491
1492 if (do_load) {
1493 assert(pre_val == LIR_OprFact::illegalOpr, "sanity");
1494 assert(addr_opr != LIR_OprFact::illegalOpr, "sanity");
1495
1496 if (patch)
1497 pre_val_patch_code = lir_patch_normal;
1498
1499 pre_val = new_register(T_OBJECT);
1500
1501 if (!addr_opr->is_address()) {
1502 assert(addr_opr->is_register(), "must be");
1503 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT));
1504 }
1505 slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, info);
1506 } else {
1507 assert(addr_opr == LIR_OprFact::illegalOpr, "sanity");
1508 assert(pre_val->is_register(), "must be");
1509 assert(pre_val->type() == T_OBJECT, "must be an object");
1510 assert(info == NULL, "sanity");
1511
1512 slow = new G1PreBarrierStub(pre_val);
1513 }
1514
1515 __ branch(lir_cond_notEqual, T_INT, slow);
1516 __ branch_destination(slow->continuation());
1517 }
1518
1519 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1520 // If the "new_val" is a constant NULL, no barrier is necessary.
1521 if (new_val->is_constant() &&
1522 new_val->as_constant_ptr()->as_jobject() == NULL) return;
1523
1524 if (!new_val->is_register()) {
1525 LIR_Opr new_val_reg = new_register(T_OBJECT);
1526 if (new_val->is_constant()) {
1527 __ move(new_val, new_val_reg);
1528 } else {
1529 __ leal(new_val, new_val_reg);
1530 }
1531 new_val = new_val_reg;
1532 }
1533 assert(new_val->is_register(), "must be a register at this point");
1534
1535 if (addr->is_address()) {
1536 LIR_Address* address = addr->as_address_ptr();
1537 LIR_Opr ptr = new_pointer_register();
1538 if (!address->index()->is_valid() && address->disp() == 0) {
1539 __ move(address->base(), ptr);
1540 } else {
1541 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
1542 __ leal(addr, ptr);
1543 }
1544 addr = ptr;
1545 }
1546 assert(addr->is_register(), "must be a register at this point");
1547
1548 LIR_Opr xor_res = new_pointer_register();
1549 LIR_Opr xor_shift_res = new_pointer_register();
1550 if (TwoOperandLIRForm ) {
1551 __ move(addr, xor_res);
1552 __ logical_xor(xor_res, new_val, xor_res);
1553 __ move(xor_res, xor_shift_res);
1554 __ unsigned_shift_right(xor_shift_res,
1555 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
1556 xor_shift_res,
1557 LIR_OprDesc::illegalOpr());
1558 } else {
1559 __ logical_xor(addr, new_val, xor_res);
1560 __ unsigned_shift_right(xor_res,
1561 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
1562 xor_shift_res,
1563 LIR_OprDesc::illegalOpr());
1564 }
1565
1566 if (!new_val->is_register()) {
1567 LIR_Opr new_val_reg = new_register(T_OBJECT);
1568 __ leal(new_val, new_val_reg);
1569 new_val = new_val_reg;
1570 }
1571 assert(new_val->is_register(), "must be a register at this point");
1572
1573 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD));
1574
1575 CodeStub* slow = new G1PostBarrierStub(addr, new_val);
1576 __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow);
1577 __ branch_destination(slow->continuation());
1578 }
1579
1580 #endif // INCLUDE_ALL_GCS
1581 ////////////////////////////////////////////////////////////////////////
1582
1583 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
1584
1585 assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code");
1586 LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base);
1587 if (addr->is_address()) {
1588 LIR_Address* address = addr->as_address_ptr();
1589 // ptr cannot be an object because we use this barrier for array card marks
1590 // and addr can point in the middle of an array.
1591 LIR_Opr ptr = new_pointer_register();
1592 if (!address->index()->is_valid() && address->disp() == 0) {
1593 __ move(address->base(), ptr);
1594 } else {
1595 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
1596 __ leal(addr, ptr);
1597 }
1598 addr = ptr;
1599 }
1600 assert(addr->is_register(), "must be a register at this point");
1601
1602 #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER
1603 CardTableModRef_post_barrier_helper(addr, card_table_base);
1604 #else
1605 LIR_Opr tmp = new_pointer_register();
1606 if (TwoOperandLIRForm) {
1607 __ move(addr, tmp);
1608 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp);
1609 } else {
1610 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp);
1611 }
1612 if (can_inline_as_constant(card_table_base)) {
1613 __ move(LIR_OprFact::intConst(0),
1614 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE));
1615 } else {
1616 __ move(LIR_OprFact::intConst(0),
1617 new LIR_Address(tmp, load_constant(card_table_base),
1618 T_BYTE));
1619 }
1620 #endif
1621 }
1622
1623
1624 //------------------------field access--------------------------------------
1625
1626 // Comment copied form templateTable_i486.cpp
1627 // ----------------------------------------------------------------------------
1628 // Volatile variables demand their effects be made known to all CPU's in
1629 // order. Store buffers on most chips allow reads & writes to reorder; the
1630 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1631 // memory barrier (i.e., it's not sufficient that the interpreter does not
1632 // reorder volatile references, the hardware also must not reorder them).
1633 //
1634 // According to the new Java Memory Model (JMM):
1635 // (1) All volatiles are serialized wrt to each other.
1636 // ALSO reads & writes act as aquire & release, so:
1637 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1638 // the read float up to before the read. It's OK for non-volatile memory refs
1639 // that happen before the volatile read to float down below it.
1640 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1641 // that happen BEFORE the write float down to after the write. It's OK for
1642 // non-volatile memory refs that happen after the volatile write to float up
1643 // before it.
1644 //
1645 // We only put in barriers around volatile refs (they are expensive), not
1646 // _between_ memory refs (that would require us to track the flavor of the
1647 // previous memory refs). Requirements (2) and (3) require some barriers
1648 // before volatile stores and after volatile loads. These nearly cover
1649 // requirement (1) but miss the volatile-store-volatile-load case. This final
1650 // case is placed after volatile-stores although it could just as well go
1651 // before volatile-loads.
1652
1653
1654 void LIRGenerator::do_StoreField(StoreField* x) {
1655 bool needs_patching = x->needs_patching();
1656 bool is_volatile = x->field()->is_volatile();
1657 BasicType field_type = x->field_type();
1658 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT);
1659
1660 CodeEmitInfo* info = NULL;
1661 if (needs_patching) {
1662 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1663 info = state_for(x, x->state_before());
1664 } else if (x->needs_null_check()) {
1665 NullCheck* nc = x->explicit_null_check();
1666 if (nc == NULL) {
1667 info = state_for(x);
1668 } else {
1669 info = state_for(nc);
1670 }
1671 }
1672
1673
1674 LIRItem object(x->obj(), this);
1675 LIRItem value(x->value(), this);
1676
1677 object.load_item();
1678
1679 if (is_volatile || needs_patching) {
1680 // load item if field is volatile (fewer special cases for volatiles)
1681 // load item if field not initialized
1682 // load item if field not constant
1683 // because of code patching we cannot inline constants
1684 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1685 value.load_byte_item();
1686 } else {
1687 value.load_item();
1688 }
1689 } else {
1690 value.load_for_store(field_type);
1691 }
1692
1693 set_no_result(x);
1694
1695 #ifndef PRODUCT
1696 if (PrintNotLoaded && needs_patching) {
1697 tty->print_cr(" ###class not loaded at store_%s bci %d",
1698 x->is_static() ? "static" : "field", x->printable_bci());
1699 }
1700 #endif
1701
1702 if (x->needs_null_check() &&
1703 (needs_patching ||
1704 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1705 // Emit an explicit null check because the offset is too large.
1706 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1707 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1708 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1709 }
1710
1711 LIR_Address* address;
1712 if (needs_patching) {
1713 // we need to patch the offset in the instruction so don't allow
1714 // generate_address to try to be smart about emitting the -1.
1715 // Otherwise the patching code won't know how to find the
1716 // instruction to patch.
1717 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type);
1718 } else {
1719 address = generate_address(object.result(), x->offset(), field_type);
1720 }
1721
1722 if (is_volatile && os::is_MP()) {
1723 __ membar_release();
1724 }
1725
1726 if (is_oop) {
1727 // Do the pre-write barrier, if any.
1728 pre_barrier(LIR_OprFact::address(address),
1729 LIR_OprFact::illegalOpr /* pre_val */,
1730 true /* do_load*/,
1731 needs_patching,
1732 (info ? new CodeEmitInfo(info) : NULL));
1733 }
1734
1735 if (is_volatile && !needs_patching) {
1736 volatile_field_store(value.result(), address, info);
1737 } else {
1738 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
1739 __ store(value.result(), address, info, patch_code);
1740 }
1741
1742 if (is_oop) {
1743 // Store to object so mark the card of the header
1744 post_barrier(object.result(), value.result());
1745 }
1746
1747 if (is_volatile && os::is_MP()) {
1748 __ membar();
1749 }
1750 }
1751
1752
1753 void LIRGenerator::do_LoadField(LoadField* x) {
1754 bool needs_patching = x->needs_patching();
1755 bool is_volatile = x->field()->is_volatile();
1756 BasicType field_type = x->field_type();
1757
1758 CodeEmitInfo* info = NULL;
1759 if (needs_patching) {
1760 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1761 info = state_for(x, x->state_before());
1762 } else if (x->needs_null_check()) {
1763 NullCheck* nc = x->explicit_null_check();
1764 if (nc == NULL) {
1765 info = state_for(x);
1766 } else {
1767 info = state_for(nc);
1768 }
1769 }
1770
1771 LIRItem object(x->obj(), this);
1772
1773 object.load_item();
1774
1775 #ifndef PRODUCT
1776 if (PrintNotLoaded && needs_patching) {
1777 tty->print_cr(" ###class not loaded at load_%s bci %d",
1778 x->is_static() ? "static" : "field", x->printable_bci());
1779 }
1780 #endif
1781
1782 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1783 if (x->needs_null_check() &&
1784 (needs_patching ||
1785 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1786 stress_deopt)) {
1787 LIR_Opr obj = object.result();
1788 if (stress_deopt) {
1789 obj = new_register(T_OBJECT);
1790 __ move(LIR_OprFact::oopConst(NULL), obj);
1791 }
1792 // Emit an explicit null check because the offset is too large.
1793 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1794 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1795 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1796 }
1797
1798 LIR_Opr reg = rlock_result(x, field_type);
1799 LIR_Address* address;
1800 if (needs_patching) {
1801 // we need to patch the offset in the instruction so don't allow
1802 // generate_address to try to be smart about emitting the -1.
1803 // Otherwise the patching code won't know how to find the
1804 // instruction to patch.
1805 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type);
1806 } else {
1807 address = generate_address(object.result(), x->offset(), field_type);
1808 }
1809
1810 if (is_volatile && !needs_patching) {
1811 volatile_field_load(address, reg, info);
1812 } else {
1813 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
1814 __ load(address, reg, info, patch_code);
1815 }
1816
1817 if (is_volatile && os::is_MP()) {
1818 __ membar_acquire();
1819 }
1820 }
1821
1822
1823 //------------------------java.nio.Buffer.checkIndex------------------------
1824
1825 // int java.nio.Buffer.checkIndex(int)
1826 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
1827 // NOTE: by the time we are in checkIndex() we are guaranteed that
1828 // the buffer is non-null (because checkIndex is package-private and
1829 // only called from within other methods in the buffer).
1830 assert(x->number_of_arguments() == 2, "wrong type");
1831 LIRItem buf (x->argument_at(0), this);
1832 LIRItem index(x->argument_at(1), this);
1833 buf.load_item();
1834 index.load_item();
1835
1836 LIR_Opr result = rlock_result(x);
1837 if (GenerateRangeChecks) {
1838 CodeEmitInfo* info = state_for(x);
1839 CodeStub* stub = new RangeCheckStub(info, index.result(), true);
1840 if (index.result()->is_constant()) {
1841 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
1842 __ branch(lir_cond_belowEqual, T_INT, stub);
1843 } else {
1844 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(),
1845 java_nio_Buffer::limit_offset(), T_INT, info);
1846 __ branch(lir_cond_aboveEqual, T_INT, stub);
1847 }
1848 __ move(index.result(), result);
1849 } else {
1850 // Just load the index into the result register
1851 __ move(index.result(), result);
1852 }
1853 }
1854
1855
1856 //------------------------array access--------------------------------------
1857
1858
1859 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1860 LIRItem array(x->array(), this);
1861 array.load_item();
1862 LIR_Opr reg = rlock_result(x);
1863
1864 CodeEmitInfo* info = NULL;
1865 if (x->needs_null_check()) {
1866 NullCheck* nc = x->explicit_null_check();
1867 if (nc == NULL) {
1868 info = state_for(x);
1869 } else {
1870 info = state_for(nc);
1871 }
1872 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1873 LIR_Opr obj = new_register(T_OBJECT);
1874 __ move(LIR_OprFact::oopConst(NULL), obj);
1875 __ null_check(obj, new CodeEmitInfo(info));
1876 }
1877 }
1878 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1879 }
1880
1881
1882 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1883 bool use_length = x->length() != NULL;
1884 LIRItem array(x->array(), this);
1885 LIRItem index(x->index(), this);
1886 LIRItem length(this);
1887 bool needs_range_check = x->compute_needs_range_check();
1888
1889 if (use_length && needs_range_check) {
1890 length.set_instruction(x->length());
1891 length.load_item();
1892 }
1893
1894 array.load_item();
1895 if (index.is_constant() && can_inline_as_constant(x->index())) {
1896 // let it be a constant
1897 index.dont_load_item();
1898 } else {
1899 index.load_item();
1900 }
1901
1902 CodeEmitInfo* range_check_info = state_for(x);
1903 CodeEmitInfo* null_check_info = NULL;
1904 if (x->needs_null_check()) {
1905 NullCheck* nc = x->explicit_null_check();
1906 if (nc != NULL) {
1907 null_check_info = state_for(nc);
1908 } else {
1909 null_check_info = range_check_info;
1910 }
1911 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
1912 LIR_Opr obj = new_register(T_OBJECT);
1913 __ move(LIR_OprFact::oopConst(NULL), obj);
1914 __ null_check(obj, new CodeEmitInfo(null_check_info));
1915 }
1916 }
1917
1918 // emit array address setup early so it schedules better
1919 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false);
1920
1921 if (GenerateRangeChecks && needs_range_check) {
1922 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
1923 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result()));
1924 } else if (use_length) {
1925 // TODO: use a (modified) version of array_range_check that does not require a
1926 // constant length to be loaded to a register
1927 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1928 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
1929 } else {
1930 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1931 // The range check performs the null check, so clear it out for the load
1932 null_check_info = NULL;
1933 }
1934 }
1935
1936 __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info);
1937 }
1938
1939
1940 void LIRGenerator::do_NullCheck(NullCheck* x) {
1941 if (x->can_trap()) {
1942 LIRItem value(x->obj(), this);
1943 value.load_item();
1944 CodeEmitInfo* info = state_for(x);
1945 __ null_check(value.result(), info);
1946 }
1947 }
1948
1949
1950 void LIRGenerator::do_TypeCast(TypeCast* x) {
1951 LIRItem value(x->obj(), this);
1952 value.load_item();
1953 // the result is the same as from the node we are casting
1954 set_result(x, value.result());
1955 }
1956
1957
1958 void LIRGenerator::do_Throw(Throw* x) {
1959 LIRItem exception(x->exception(), this);
1960 exception.load_item();
1961 set_no_result(x);
1962 LIR_Opr exception_opr = exception.result();
1963 CodeEmitInfo* info = state_for(x, x->state());
1964
1965 #ifndef PRODUCT
1966 if (PrintC1Statistics) {
1967 increment_counter(Runtime1::throw_count_address(), T_INT);
1968 }
1969 #endif
1970
1971 // check if the instruction has an xhandler in any of the nested scopes
1972 bool unwind = false;
1973 if (info->exception_handlers()->length() == 0) {
1974 // this throw is not inside an xhandler
1975 unwind = true;
1976 } else {
1977 // get some idea of the throw type
1978 bool type_is_exact = true;
1979 ciType* throw_type = x->exception()->exact_type();
1980 if (throw_type == NULL) {
1981 type_is_exact = false;
1982 throw_type = x->exception()->declared_type();
1983 }
1984 if (throw_type != NULL && throw_type->is_instance_klass()) {
1985 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
1986 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
1987 }
1988 }
1989
1990 // do null check before moving exception oop into fixed register
1991 // to avoid a fixed interval with an oop during the null check.
1992 // Use a copy of the CodeEmitInfo because debug information is
1993 // different for null_check and throw.
1994 if (GenerateCompilerNullChecks &&
1995 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) {
1996 // if the exception object wasn't created using new then it might be null.
1997 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
1998 }
1999
2000 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2001 // we need to go through the exception lookup path to get JVMTI
2002 // notification done
2003 unwind = false;
2004 }
2005
2006 // move exception oop into fixed register
2007 __ move(exception_opr, exceptionOopOpr());
2008
2009 if (unwind) {
2010 __ unwind_exception(exceptionOopOpr());
2011 } else {
2012 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2013 }
2014 }
2015
2016
2017 void LIRGenerator::do_RoundFP(RoundFP* x) {
2018 LIRItem input(x->input(), this);
2019 input.load_item();
2020 LIR_Opr input_opr = input.result();
2021 assert(input_opr->is_register(), "why round if value is not in a register?");
2022 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2023 if (input_opr->is_single_fpu()) {
2024 set_result(x, round_item(input_opr)); // This code path not currently taken
2025 } else {
2026 LIR_Opr result = new_register(T_DOUBLE);
2027 set_vreg_flag(result, must_start_in_memory);
2028 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2029 set_result(x, result);
2030 }
2031 }
2032
2033 // Here UnsafeGetRaw may have x->base() and x->index() be int or long
2034 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit.
2035 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
2036 LIRItem base(x->base(), this);
2037 LIRItem idx(this);
2038
2039 base.load_item();
2040 if (x->has_index()) {
2041 idx.set_instruction(x->index());
2042 idx.load_nonconstant();
2043 }
2044
2045 LIR_Opr reg = rlock_result(x, x->basic_type());
2046
2047 int log2_scale = 0;
2048 if (x->has_index()) {
2049 log2_scale = x->log2_scale();
2050 }
2051
2052 assert(!x->has_index() || idx.value() == x->index(), "should match");
2053
2054 LIR_Opr base_op = base.result();
2055 LIR_Opr index_op = idx.result();
2056 #ifndef _LP64
2057 if (base_op->type() == T_LONG) {
2058 base_op = new_register(T_INT);
2059 __ convert(Bytecodes::_l2i, base.result(), base_op);
2060 }
2061 if (x->has_index()) {
2062 if (index_op->type() == T_LONG) {
2063 LIR_Opr long_index_op = index_op;
2064 if (index_op->is_constant()) {
2065 long_index_op = new_register(T_LONG);
2066 __ move(index_op, long_index_op);
2067 }
2068 index_op = new_register(T_INT);
2069 __ convert(Bytecodes::_l2i, long_index_op, index_op);
2070 } else {
2071 assert(x->index()->type()->tag() == intTag, "must be");
2072 }
2073 }
2074 // At this point base and index should be all ints.
2075 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2076 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int");
2077 #else
2078 if (x->has_index()) {
2079 if (index_op->type() == T_INT) {
2080 if (!index_op->is_constant()) {
2081 index_op = new_register(T_LONG);
2082 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2083 }
2084 } else {
2085 assert(index_op->type() == T_LONG, "must be");
2086 if (index_op->is_constant()) {
2087 index_op = new_register(T_LONG);
2088 __ move(idx.result(), index_op);
2089 }
2090 }
2091 }
2092 // At this point base is a long non-constant
2093 // Index is a long register or a int constant.
2094 // We allow the constant to stay an int because that would allow us a more compact encoding by
2095 // embedding an immediate offset in the address expression. If we have a long constant, we have to
2096 // move it into a register first.
2097 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant");
2098 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) ||
2099 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type");
2100 #endif
2101
2102 BasicType dst_type = x->basic_type();
2103
2104 LIR_Address* addr;
2105 if (index_op->is_constant()) {
2106 assert(log2_scale == 0, "must not have a scale");
2107 assert(index_op->type() == T_INT, "only int constants supported");
2108 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
2109 } else {
2110 #ifdef X86
2111 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
2112 #elif defined(GENERATE_ADDRESS_IS_PREFERRED)
2113 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type);
2114 #else
2115 if (index_op->is_illegal() || log2_scale == 0) {
2116 addr = new LIR_Address(base_op, index_op, dst_type);
2117 } else {
2118 LIR_Opr tmp = new_pointer_register();
2119 __ shift_left(index_op, log2_scale, tmp);
2120 addr = new LIR_Address(base_op, tmp, dst_type);
2121 }
2122 #endif
2123 }
2124
2125 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
2126 __ unaligned_move(addr, reg);
2127 } else {
2128 if (dst_type == T_OBJECT && x->is_wide()) {
2129 __ move_wide(addr, reg);
2130 } else {
2131 __ move(addr, reg);
2132 }
2133 }
2134 }
2135
2136
2137 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
2138 int log2_scale = 0;
2139 BasicType type = x->basic_type();
2140
2141 if (x->has_index()) {
2142 log2_scale = x->log2_scale();
2143 }
2144
2145 LIRItem base(x->base(), this);
2146 LIRItem value(x->value(), this);
2147 LIRItem idx(this);
2148
2149 base.load_item();
2150 if (x->has_index()) {
2151 idx.set_instruction(x->index());
2152 idx.load_item();
2153 }
2154
2155 if (type == T_BYTE || type == T_BOOLEAN) {
2156 value.load_byte_item();
2157 } else {
2158 value.load_item();
2159 }
2160
2161 set_no_result(x);
2162
2163 LIR_Opr base_op = base.result();
2164 LIR_Opr index_op = idx.result();
2165
2166 #ifdef GENERATE_ADDRESS_IS_PREFERRED
2167 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type());
2168 #else
2169 #ifndef _LP64
2170 if (base_op->type() == T_LONG) {
2171 base_op = new_register(T_INT);
2172 __ convert(Bytecodes::_l2i, base.result(), base_op);
2173 }
2174 if (x->has_index()) {
2175 if (index_op->type() == T_LONG) {
2176 index_op = new_register(T_INT);
2177 __ convert(Bytecodes::_l2i, idx.result(), index_op);
2178 }
2179 }
2180 // At this point base and index should be all ints and not constants
2181 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2182 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int");
2183 #else
2184 if (x->has_index()) {
2185 if (index_op->type() == T_INT) {
2186 index_op = new_register(T_LONG);
2187 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2188 }
2189 }
2190 // At this point base and index are long and non-constant
2191 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long");
2192 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long");
2193 #endif
2194
2195 if (log2_scale != 0) {
2196 // temporary fix (platform dependent code without shift on Intel would be better)
2197 // TODO: ARM also allows embedded shift in the address
2198 LIR_Opr tmp = new_pointer_register();
2199 if (TwoOperandLIRForm) {
2200 __ move(index_op, tmp);
2201 index_op = tmp;
2202 }
2203 __ shift_left(index_op, log2_scale, tmp);
2204 if (!TwoOperandLIRForm) {
2205 index_op = tmp;
2206 }
2207 }
2208
2209 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
2210 #endif // !GENERATE_ADDRESS_IS_PREFERRED
2211 __ move(value.result(), addr);
2212 }
2213
2214
2215 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
2216 BasicType type = x->basic_type();
2217 LIRItem src(x->object(), this);
2218 LIRItem off(x->offset(), this);
2219
2220 off.load_item();
2221 src.load_item();
2222
2223 LIR_Opr value = rlock_result(x, x->basic_type());
2224
2225 get_Object_unsafe(value, src.result(), off.result(), type, x->is_volatile());
2226
2227 #if INCLUDE_ALL_GCS
2228 // We might be reading the value of the referent field of a
2229 // Reference object in order to attach it back to the live
2230 // object graph. If G1 is enabled then we need to record
2231 // the value that is being returned in an SATB log buffer.
2232 //
2233 // We need to generate code similar to the following...
2234 //
2235 // if (offset == java_lang_ref_Reference::referent_offset) {
2236 // if (src != NULL) {
2237 // if (klass(src)->reference_type() != REF_NONE) {
2238 // pre_barrier(..., value, ...);
2239 // }
2240 // }
2241 // }
2242
2243 if (UseG1GC && type == T_OBJECT) {
2244 bool gen_pre_barrier = true; // Assume we need to generate pre_barrier.
2245 bool gen_offset_check = true; // Assume we need to generate the offset guard.
2246 bool gen_source_check = true; // Assume we need to check the src object for null.
2247 bool gen_type_check = true; // Assume we need to check the reference_type.
2248
2249 if (off.is_constant()) {
2250 jlong off_con = (off.type()->is_int() ?
2251 (jlong) off.get_jint_constant() :
2252 off.get_jlong_constant());
2253
2254
2255 if (off_con != (jlong) java_lang_ref_Reference::referent_offset) {
2256 // The constant offset is something other than referent_offset.
2257 // We can skip generating/checking the remaining guards and
2258 // skip generation of the code stub.
2259 gen_pre_barrier = false;
2260 } else {
2261 // The constant offset is the same as referent_offset -
2262 // we do not need to generate a runtime offset check.
2263 gen_offset_check = false;
2264 }
2265 }
2266
2267 // We don't need to generate stub if the source object is an array
2268 if (gen_pre_barrier && src.type()->is_array()) {
2269 gen_pre_barrier = false;
2270 }
2271
2272 if (gen_pre_barrier) {
2273 // We still need to continue with the checks.
2274 if (src.is_constant()) {
2275 ciObject* src_con = src.get_jobject_constant();
2276 guarantee(src_con != NULL, "no source constant");
2277
2278 if (src_con->is_null_object()) {
2279 // The constant src object is null - We can skip
2280 // generating the code stub.
2281 gen_pre_barrier = false;
2282 } else {
2283 // Non-null constant source object. We still have to generate
2284 // the slow stub - but we don't need to generate the runtime
2285 // null object check.
2286 gen_source_check = false;
2287 }
2288 }
2289 }
2290 if (gen_pre_barrier && !PatchALot) {
2291 // Can the klass of object be statically determined to be
2292 // a sub-class of Reference?
2293 ciType* type = src.value()->declared_type();
2294 if ((type != NULL) && type->is_loaded()) {
2295 if (type->is_subtype_of(compilation()->env()->Reference_klass())) {
2296 gen_type_check = false;
2297 } else if (type->is_klass() &&
2298 !compilation()->env()->Object_klass()->is_subtype_of(type->as_klass())) {
2299 // Not Reference and not Object klass.
2300 gen_pre_barrier = false;
2301 }
2302 }
2303 }
2304
2305 if (gen_pre_barrier) {
2306 LabelObj* Lcont = new LabelObj();
2307
2308 // We can have generate one runtime check here. Let's start with
2309 // the offset check.
2310 if (gen_offset_check) {
2311 // if (offset != referent_offset) -> continue
2312 // If offset is an int then we can do the comparison with the
2313 // referent_offset constant; otherwise we need to move
2314 // referent_offset into a temporary register and generate
2315 // a reg-reg compare.
2316
2317 LIR_Opr referent_off;
2318
2319 if (off.type()->is_int()) {
2320 referent_off = LIR_OprFact::intConst(java_lang_ref_Reference::referent_offset);
2321 } else {
2322 assert(off.type()->is_long(), "what else?");
2323 referent_off = new_register(T_LONG);
2324 __ move(LIR_OprFact::longConst(java_lang_ref_Reference::referent_offset), referent_off);
2325 }
2326 __ cmp(lir_cond_notEqual, off.result(), referent_off);
2327 __ branch(lir_cond_notEqual, as_BasicType(off.type()), Lcont->label());
2328 }
2329 if (gen_source_check) {
2330 // offset is a const and equals referent offset
2331 // if (source == null) -> continue
2332 __ cmp(lir_cond_equal, src.result(), LIR_OprFact::oopConst(NULL));
2333 __ branch(lir_cond_equal, T_OBJECT, Lcont->label());
2334 }
2335 LIR_Opr src_klass = new_register(T_OBJECT);
2336 if (gen_type_check) {
2337 // We have determined that offset == referent_offset && src != null.
2338 // if (src->_klass->_reference_type == REF_NONE) -> continue
2339 __ move(new LIR_Address(src.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), src_klass);
2340 LIR_Address* reference_type_addr = new LIR_Address(src_klass, in_bytes(InstanceKlass::reference_type_offset()), T_BYTE);
2341 LIR_Opr reference_type = new_register(T_INT);
2342 __ move(reference_type_addr, reference_type);
2343 __ cmp(lir_cond_equal, reference_type, LIR_OprFact::intConst(REF_NONE));
2344 __ branch(lir_cond_equal, T_INT, Lcont->label());
2345 }
2346 {
2347 // We have determined that src->_klass->_reference_type != REF_NONE
2348 // so register the value in the referent field with the pre-barrier.
2349 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */,
2350 value /* pre_val */,
2351 false /* do_load */,
2352 false /* patch */,
2353 NULL /* info */);
2354 }
2355 __ branch_destination(Lcont->label());
2356 }
2357 }
2358 #endif // INCLUDE_ALL_GCS
2359
2360 if (x->is_volatile() && os::is_MP()) __ membar_acquire();
2361 }
2362
2363
2364 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
2365 BasicType type = x->basic_type();
2366 LIRItem src(x->object(), this);
2367 LIRItem off(x->offset(), this);
2368 LIRItem data(x->value(), this);
2369
2370 src.load_item();
2371 if (type == T_BOOLEAN || type == T_BYTE) {
2372 data.load_byte_item();
2373 } else {
2374 data.load_item();
2375 }
2376 off.load_item();
2377
2378 set_no_result(x);
2379
2380 if (x->is_volatile() && os::is_MP()) __ membar_release();
2381 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile());
2382 if (x->is_volatile() && os::is_MP()) __ membar();
2383 }
2384
2385
2386 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) {
2387 LIRItem src(x->object(), this);
2388 LIRItem off(x->offset(), this);
2389
2390 src.load_item();
2391 if (off.is_constant() && can_inline_as_constant(x->offset())) {
2392 // let it be a constant
2393 off.dont_load_item();
2394 } else {
2395 off.load_item();
2396 }
2397
2398 set_no_result(x);
2399
2400 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE);
2401 __ prefetch(addr, is_store);
2402 }
2403
2404
2405 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) {
2406 do_UnsafePrefetch(x, false);
2407 }
2408
2409
2410 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) {
2411 do_UnsafePrefetch(x, true);
2412 }
2413
2414
2415 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2416 int lng = x->length();
2417
2418 for (int i = 0; i < lng; i++) {
2419 SwitchRange* one_range = x->at(i);
2420 int low_key = one_range->low_key();
2421 int high_key = one_range->high_key();
2422 BlockBegin* dest = one_range->sux();
2423 if (low_key == high_key) {
2424 __ cmp(lir_cond_equal, value, low_key);
2425 __ branch(lir_cond_equal, T_INT, dest);
2426 } else if (high_key - low_key == 1) {
2427 __ cmp(lir_cond_equal, value, low_key);
2428 __ branch(lir_cond_equal, T_INT, dest);
2429 __ cmp(lir_cond_equal, value, high_key);
2430 __ branch(lir_cond_equal, T_INT, dest);
2431 } else {
2432 LabelObj* L = new LabelObj();
2433 __ cmp(lir_cond_less, value, low_key);
2434 __ branch(lir_cond_less, T_INT, L->label());
2435 __ cmp(lir_cond_lessEqual, value, high_key);
2436 __ branch(lir_cond_lessEqual, T_INT, dest);
2437 __ branch_destination(L->label());
2438 }
2439 }
2440 __ jump(default_sux);
2441 }
2442
2443
2444 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2445 SwitchRangeList* res = new SwitchRangeList();
2446 int len = x->length();
2447 if (len > 0) {
2448 BlockBegin* sux = x->sux_at(0);
2449 int key = x->lo_key();
2450 BlockBegin* default_sux = x->default_sux();
2451 SwitchRange* range = new SwitchRange(key, sux);
2452 for (int i = 0; i < len; i++, key++) {
2453 BlockBegin* new_sux = x->sux_at(i);
2454 if (sux == new_sux) {
2455 // still in same range
2456 range->set_high_key(key);
2457 } else {
2458 // skip tests which explicitly dispatch to the default
2459 if (sux != default_sux) {
2460 res->append(range);
2461 }
2462 range = new SwitchRange(key, new_sux);
2463 }
2464 sux = new_sux;
2465 }
2466 if (res->length() == 0 || res->last() != range) res->append(range);
2467 }
2468 return res;
2469 }
2470
2471
2472 // we expect the keys to be sorted by increasing value
2473 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2474 SwitchRangeList* res = new SwitchRangeList();
2475 int len = x->length();
2476 if (len > 0) {
2477 BlockBegin* default_sux = x->default_sux();
2478 int key = x->key_at(0);
2479 BlockBegin* sux = x->sux_at(0);
2480 SwitchRange* range = new SwitchRange(key, sux);
2481 for (int i = 1; i < len; i++) {
2482 int new_key = x->key_at(i);
2483 BlockBegin* new_sux = x->sux_at(i);
2484 if (key+1 == new_key && sux == new_sux) {
2485 // still in same range
2486 range->set_high_key(new_key);
2487 } else {
2488 // skip tests which explicitly dispatch to the default
2489 if (range->sux() != default_sux) {
2490 res->append(range);
2491 }
2492 range = new SwitchRange(new_key, new_sux);
2493 }
2494 key = new_key;
2495 sux = new_sux;
2496 }
2497 if (res->length() == 0 || res->last() != range) res->append(range);
2498 }
2499 return res;
2500 }
2501
2502
2503 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2504 LIRItem tag(x->tag(), this);
2505 tag.load_item();
2506 set_no_result(x);
2507
2508 if (x->is_safepoint()) {
2509 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2510 }
2511
2512 // move values into phi locations
2513 move_to_phi(x->state());
2514
2515 int lo_key = x->lo_key();
2516 int hi_key = x->hi_key();
2517 int len = x->length();
2518 LIR_Opr value = tag.result();
2519 if (UseTableRanges) {
2520 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2521 } else {
2522 for (int i = 0; i < len; i++) {
2523 __ cmp(lir_cond_equal, value, i + lo_key);
2524 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2525 }
2526 __ jump(x->default_sux());
2527 }
2528 }
2529
2530
2531 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2532 LIRItem tag(x->tag(), this);
2533 tag.load_item();
2534 set_no_result(x);
2535
2536 if (x->is_safepoint()) {
2537 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2538 }
2539
2540 // move values into phi locations
2541 move_to_phi(x->state());
2542
2543 LIR_Opr value = tag.result();
2544 if (UseTableRanges) {
2545 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2546 } else {
2547 int len = x->length();
2548 for (int i = 0; i < len; i++) {
2549 __ cmp(lir_cond_equal, value, x->key_at(i));
2550 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2551 }
2552 __ jump(x->default_sux());
2553 }
2554 }
2555
2556
2557 void LIRGenerator::do_Goto(Goto* x) {
2558 set_no_result(x);
2559
2560 if (block()->next()->as_OsrEntry()) {
2561 // need to free up storage used for OSR entry point
2562 LIR_Opr osrBuffer = block()->next()->operand();
2563 BasicTypeList signature;
2564 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2565 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2566 __ move(osrBuffer, cc->args()->at(0));
2567 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2568 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2569 }
2570
2571 if (x->is_safepoint()) {
2572 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2573
2574 // increment backedge counter if needed
2575 CodeEmitInfo* info = state_for(x, state);
2576 increment_backedge_counter(info, x->profiled_bci());
2577 CodeEmitInfo* safepoint_info = state_for(x, state);
2578 __ safepoint(safepoint_poll_register(), safepoint_info);
2579 }
2580
2581 // Gotos can be folded Ifs, handle this case.
2582 if (x->should_profile()) {
2583 ciMethod* method = x->profiled_method();
2584 assert(method != NULL, "method should be set if branch is profiled");
2585 ciMethodData* md = method->method_data_or_null();
2586 assert(md != NULL, "Sanity");
2587 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2588 assert(data != NULL, "must have profiling data");
2589 int offset;
2590 if (x->direction() == Goto::taken) {
2591 assert(data->is_BranchData(), "need BranchData for two-way branches");
2592 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2593 } else if (x->direction() == Goto::not_taken) {
2594 assert(data->is_BranchData(), "need BranchData for two-way branches");
2595 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2596 } else {
2597 assert(data->is_JumpData(), "need JumpData for branches");
2598 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2599 }
2600 LIR_Opr md_reg = new_register(T_METADATA);
2601 __ metadata2reg(md->constant_encoding(), md_reg);
2602
2603 increment_counter(new LIR_Address(md_reg, offset,
2604 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2605 }
2606
2607 // emit phi-instruction move after safepoint since this simplifies
2608 // describing the state as the safepoint.
2609 move_to_phi(x->state());
2610
2611 __ jump(x->default_sux());
2612 }
2613
2614 /**
2615 * Emit profiling code if needed for arguments, parameters, return value types
2616 *
2617 * @param md MDO the code will update at runtime
2618 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2619 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2620 * @param profiled_k current profile
2621 * @param obj IR node for the object to be profiled
2622 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2623 * Set once we find an update to make and use for next ones.
2624 * @param not_null true if we know obj cannot be null
2625 * @param signature_at_call_k signature at call for obj
2626 * @param callee_signature_k signature of callee for obj
2627 * at call and callee signatures differ at method handle call
2628 * @return the only klass we know will ever be seen at this profile point
2629 */
2630 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2631 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2632 ciKlass* callee_signature_k) {
2633 ciKlass* result = NULL;
2634 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2635 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2636 // known not to be null or null bit already set and already set to
2637 // unknown: nothing we can do to improve profiling
2638 if (!do_null && !do_update) {
2639 return result;
2640 }
2641
2642 ciKlass* exact_klass = NULL;
2643 Compilation* comp = Compilation::current();
2644 if (do_update) {
2645 // try to find exact type, using CHA if possible, so that loading
2646 // the klass from the object can be avoided
2647 ciType* type = obj->exact_type();
2648 if (type == NULL) {
2649 type = obj->declared_type();
2650 type = comp->cha_exact_type(type);
2651 }
2652 assert(type == NULL || type->is_klass(), "type should be class");
2653 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL;
2654
2655 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2656 }
2657
2658 if (!do_null && !do_update) {
2659 return result;
2660 }
2661
2662 ciKlass* exact_signature_k = NULL;
2663 if (do_update) {
2664 // Is the type from the signature exact (the only one possible)?
2665 exact_signature_k = signature_at_call_k->exact_klass();
2666 if (exact_signature_k == NULL) {
2667 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2668 } else {
2669 result = exact_signature_k;
2670 // Known statically. No need to emit any code: prevent
2671 // LIR_Assembler::emit_profile_type() from emitting useless code
2672 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2673 }
2674 // exact_klass and exact_signature_k can be both non NULL but
2675 // different if exact_klass is loaded after the ciObject for
2676 // exact_signature_k is created.
2677 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) {
2678 // sometimes the type of the signature is better than the best type
2679 // the compiler has
2680 exact_klass = exact_signature_k;
2681 }
2682 if (callee_signature_k != NULL &&
2683 callee_signature_k != signature_at_call_k) {
2684 ciKlass* improved_klass = callee_signature_k->exact_klass();
2685 if (improved_klass == NULL) {
2686 improved_klass = comp->cha_exact_type(callee_signature_k);
2687 }
2688 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) {
2689 exact_klass = exact_signature_k;
2690 }
2691 }
2692 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2693 }
2694
2695 if (!do_null && !do_update) {
2696 return result;
2697 }
2698
2699 if (mdp == LIR_OprFact::illegalOpr) {
2700 mdp = new_register(T_METADATA);
2701 __ metadata2reg(md->constant_encoding(), mdp);
2702 if (md_base_offset != 0) {
2703 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2704 mdp = new_pointer_register();
2705 __ leal(LIR_OprFact::address(base_type_address), mdp);
2706 }
2707 }
2708 LIRItem value(obj, this);
2709 value.load_item();
2710 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2711 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
2712 return result;
2713 }
2714
2715 // profile parameters on entry to the root of the compilation
2716 void LIRGenerator::profile_parameters(Base* x) {
2717 if (compilation()->profile_parameters()) {
2718 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2719 ciMethodData* md = scope()->method()->method_data_or_null();
2720 assert(md != NULL, "Sanity");
2721
2722 if (md->parameters_type_data() != NULL) {
2723 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2724 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2725 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2726 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2727 LIR_Opr src = args->at(i);
2728 assert(!src->is_illegal(), "check");
2729 BasicType t = src->type();
2730 if (t == T_OBJECT || t == T_ARRAY) {
2731 intptr_t profiled_k = parameters->type(j);
2732 Local* local = x->state()->local_at(java_index)->as_Local();
2733 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2734 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2735 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
2736 // If the profile is known statically set it once for all and do not emit any code
2737 if (exact != NULL) {
2738 md->set_parameter_type(j, exact);
2739 }
2740 j++;
2741 }
2742 java_index += type2size[t];
2743 }
2744 }
2745 }
2746 }
2747
2748 void LIRGenerator::do_Base(Base* x) {
2749 __ std_entry(LIR_OprFact::illegalOpr);
2750 // Emit moves from physical registers / stack slots to virtual registers
2751 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2752 IRScope* irScope = compilation()->hir()->top_scope();
2753 int java_index = 0;
2754 for (int i = 0; i < args->length(); i++) {
2755 LIR_Opr src = args->at(i);
2756 assert(!src->is_illegal(), "check");
2757 BasicType t = src->type();
2758
2759 // Types which are smaller than int are passed as int, so
2760 // correct the type which passed.
2761 switch (t) {
2762 case T_BYTE:
2763 case T_BOOLEAN:
2764 case T_SHORT:
2765 case T_CHAR:
2766 t = T_INT;
2767 break;
2768 }
2769
2770 LIR_Opr dest = new_register(t);
2771 __ move(src, dest);
2772
2773 // Assign new location to Local instruction for this local
2774 Local* local = x->state()->local_at(java_index)->as_Local();
2775 assert(local != NULL, "Locals for incoming arguments must have been created");
2776 #ifndef __SOFTFP__
2777 // The java calling convention passes double as long and float as int.
2778 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2779 #endif // __SOFTFP__
2780 local->set_operand(dest);
2781 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
2782 java_index += type2size[t];
2783 }
2784
2785 if (compilation()->env()->dtrace_method_probes()) {
2786 BasicTypeList signature;
2787 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2788 signature.append(T_METADATA); // Method*
2789 LIR_OprList* args = new LIR_OprList();
2790 args->append(getThreadPointer());
2791 LIR_Opr meth = new_register(T_METADATA);
2792 __ metadata2reg(method()->constant_encoding(), meth);
2793 args->append(meth);
2794 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
2795 }
2796
2797 if (method()->is_synchronized()) {
2798 LIR_Opr obj;
2799 if (method()->is_static()) {
2800 obj = new_register(T_OBJECT);
2801 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2802 } else {
2803 Local* receiver = x->state()->local_at(0)->as_Local();
2804 assert(receiver != NULL, "must already exist");
2805 obj = receiver->operand();
2806 }
2807 assert(obj->is_valid(), "must be valid");
2808
2809 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2810 LIR_Opr lock = new_register(T_INT);
2811 __ load_stack_address_monitor(0, lock);
2812
2813 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException));
2814 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2815
2816 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
2817 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
2818 }
2819 }
2820
2821 // increment invocation counters if needed
2822 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2823 profile_parameters(x);
2824 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false);
2825 increment_invocation_counter(info);
2826 }
2827
2828 // all blocks with a successor must end with an unconditional jump
2829 // to the successor even if they are consecutive
2830 __ jump(x->default_sux());
2831 }
2832
2833
2834 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2835 // construct our frame and model the production of incoming pointer
2836 // to the OSR buffer.
2837 __ osr_entry(LIR_Assembler::osrBufferPointer());
2838 LIR_Opr result = rlock_result(x);
2839 __ move(LIR_Assembler::osrBufferPointer(), result);
2840 }
2841
2842
2843 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2844 assert(args->length() == arg_list->length(),
2845 err_msg_res("args=%d, arg_list=%d", args->length(), arg_list->length()));
2846 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2847 LIRItem* param = args->at(i);
2848 LIR_Opr loc = arg_list->at(i);
2849 if (loc->is_register()) {
2850 param->load_item_force(loc);
2851 } else {
2852 LIR_Address* addr = loc->as_address_ptr();
2853 param->load_for_store(addr->type());
2854 if (addr->type() == T_OBJECT) {
2855 __ move_wide(param->result(), addr);
2856 } else
2857 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
2858 __ unaligned_move(param->result(), addr);
2859 } else {
2860 __ move(param->result(), addr);
2861 }
2862 }
2863 }
2864
2865 if (x->has_receiver()) {
2866 LIRItem* receiver = args->at(0);
2867 LIR_Opr loc = arg_list->at(0);
2868 if (loc->is_register()) {
2869 receiver->load_item_force(loc);
2870 } else {
2871 assert(loc->is_address(), "just checking");
2872 receiver->load_for_store(T_OBJECT);
2873 __ move_wide(receiver->result(), loc->as_address_ptr());
2874 }
2875 }
2876 }
2877
2878
2879 // Visits all arguments, returns appropriate items without loading them
2880 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2881 LIRItemList* argument_items = new LIRItemList();
2882 if (x->has_receiver()) {
2883 LIRItem* receiver = new LIRItem(x->receiver(), this);
2884 argument_items->append(receiver);
2885 }
2886 for (int i = 0; i < x->number_of_arguments(); i++) {
2887 LIRItem* param = new LIRItem(x->argument_at(i), this);
2888 argument_items->append(param);
2889 }
2890 return argument_items;
2891 }
2892
2893
2894 // The invoke with receiver has following phases:
2895 // a) traverse and load/lock receiver;
2896 // b) traverse all arguments -> item-array (invoke_visit_argument)
2897 // c) push receiver on stack
2898 // d) load each of the items and push on stack
2899 // e) unlock receiver
2900 // f) move receiver into receiver-register %o0
2901 // g) lock result registers and emit call operation
2902 //
2903 // Before issuing a call, we must spill-save all values on stack
2904 // that are in caller-save register. "spill-save" moves those registers
2905 // either in a free callee-save register or spills them if no free
2906 // callee save register is available.
2907 //
2908 // The problem is where to invoke spill-save.
2909 // - if invoked between e) and f), we may lock callee save
2910 // register in "spill-save" that destroys the receiver register
2911 // before f) is executed
2912 // - if we rearrange f) to be earlier (by loading %o0) it
2913 // may destroy a value on the stack that is currently in %o0
2914 // and is waiting to be spilled
2915 // - if we keep the receiver locked while doing spill-save,
2916 // we cannot spill it as it is spill-locked
2917 //
2918 void LIRGenerator::do_Invoke(Invoke* x) {
2919 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2920
2921 LIR_OprList* arg_list = cc->args();
2922 LIRItemList* args = invoke_visit_arguments(x);
2923 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2924
2925 // setup result register
2926 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2927 if (x->type() != voidType) {
2928 result_register = result_register_for(x->type());
2929 }
2930
2931 CodeEmitInfo* info = state_for(x, x->state());
2932
2933 invoke_load_arguments(x, args, arg_list);
2934
2935 if (x->has_receiver()) {
2936 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2937 receiver = args->at(0)->result();
2938 }
2939
2940 // emit invoke code
2941 bool optimized = x->target_is_loaded() && x->target_is_final();
2942 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2943
2944 // JSR 292
2945 // Preserve the SP over MethodHandle call sites, if needed.
2946 ciMethod* target = x->target();
2947 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
2948 target->is_method_handle_intrinsic() ||
2949 target->is_compiled_lambda_form());
2950 if (is_method_handle_invoke) {
2951 info->set_is_method_handle_invoke(true);
2952 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2953 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
2954 }
2955 }
2956
2957 switch (x->code()) {
2958 case Bytecodes::_invokestatic:
2959 __ call_static(target, result_register,
2960 SharedRuntime::get_resolve_static_call_stub(),
2961 arg_list, info);
2962 break;
2963 case Bytecodes::_invokespecial:
2964 case Bytecodes::_invokevirtual:
2965 case Bytecodes::_invokeinterface:
2966 // for final target we still produce an inline cache, in order
2967 // to be able to call mixed mode
2968 if (x->code() == Bytecodes::_invokespecial || optimized) {
2969 __ call_opt_virtual(target, receiver, result_register,
2970 SharedRuntime::get_resolve_opt_virtual_call_stub(),
2971 arg_list, info);
2972 } else if (x->vtable_index() < 0) {
2973 __ call_icvirtual(target, receiver, result_register,
2974 SharedRuntime::get_resolve_virtual_call_stub(),
2975 arg_list, info);
2976 } else {
2977 int entry_offset = InstanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size();
2978 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes();
2979 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info);
2980 }
2981 break;
2982 case Bytecodes::_invokedynamic: {
2983 __ call_dynamic(target, receiver, result_register,
2984 SharedRuntime::get_resolve_static_call_stub(),
2985 arg_list, info);
2986 break;
2987 }
2988 default:
2989 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(x->code())));
2990 break;
2991 }
2992
2993 // JSR 292
2994 // Restore the SP after MethodHandle call sites, if needed.
2995 if (is_method_handle_invoke
2996 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2997 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
2998 }
2999
3000 if (x->type()->is_float() || x->type()->is_double()) {
3001 // Force rounding of results from non-strictfp when in strictfp
3002 // scope (or when we don't know the strictness of the callee, to
3003 // be safe.)
3004 if (method()->is_strict()) {
3005 if (!x->target_is_loaded() || !x->target_is_strictfp()) {
3006 result_register = round_item(result_register);
3007 }
3008 }
3009 }
3010
3011 if (result_register->is_valid()) {
3012 LIR_Opr result = rlock_result(x);
3013 __ move(result_register, result);
3014 }
3015 }
3016
3017
3018 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
3019 assert(x->number_of_arguments() == 1, "wrong type");
3020 LIRItem value (x->argument_at(0), this);
3021 LIR_Opr reg = rlock_result(x);
3022 value.load_item();
3023 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
3024 __ move(tmp, reg);
3025 }
3026
3027
3028
3029 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
3030 void LIRGenerator::do_IfOp(IfOp* x) {
3031 #ifdef ASSERT
3032 {
3033 ValueTag xtag = x->x()->type()->tag();
3034 ValueTag ttag = x->tval()->type()->tag();
3035 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
3036 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
3037 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
3038 }
3039 #endif
3040
3041 LIRItem left(x->x(), this);
3042 LIRItem right(x->y(), this);
3043 left.load_item();
3044 if (can_inline_as_constant(right.value())) {
3045 right.dont_load_item();
3046 } else {
3047 right.load_item();
3048 }
3049
3050 LIRItem t_val(x->tval(), this);
3051 LIRItem f_val(x->fval(), this);
3052 t_val.dont_load_item();
3053 f_val.dont_load_item();
3054 LIR_Opr reg = rlock_result(x);
3055
3056 __ cmp(lir_cond(x->cond()), left.result(), right.result());
3057 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
3058 }
3059
3060 void LIRGenerator::do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x) {
3061 assert(x->number_of_arguments() == expected_arguments, "wrong type");
3062 LIR_Opr reg = result_register_for(x->type());
3063 __ call_runtime_leaf(routine, getThreadTemp(),
3064 reg, new LIR_OprList());
3065 LIR_Opr result = rlock_result(x);
3066 __ move(reg, result);
3067 }
3068
3069 #ifdef TRACE_HAVE_INTRINSICS
3070 void LIRGenerator::do_ThreadIDIntrinsic(Intrinsic* x) {
3071 LIR_Opr thread = getThreadPointer();
3072 LIR_Opr osthread = new_pointer_register();
3073 __ move(new LIR_Address(thread, in_bytes(JavaThread::osthread_offset()), osthread->type()), osthread);
3074 size_t thread_id_size = OSThread::thread_id_size();
3075 if (thread_id_size == (size_t) BytesPerLong) {
3076 LIR_Opr id = new_register(T_LONG);
3077 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_LONG), id);
3078 __ convert(Bytecodes::_l2i, id, rlock_result(x));
3079 } else if (thread_id_size == (size_t) BytesPerInt) {
3080 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_INT), rlock_result(x));
3081 } else {
3082 ShouldNotReachHere();
3083 }
3084 }
3085
3086 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
3087 CodeEmitInfo* info = state_for(x);
3088 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check
3089 BasicType klass_pointer_type = NOT_LP64(T_INT) LP64_ONLY(T_LONG);
3090 assert(info != NULL, "must have info");
3091 LIRItem arg(x->argument_at(1), this);
3092 arg.load_item();
3093 LIR_Opr klass = new_pointer_register();
3094 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), klass_pointer_type), klass, info);
3095 LIR_Opr id = new_register(T_LONG);
3096 ByteSize offset = TRACE_ID_OFFSET;
3097 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG);
3098 __ move(trace_id_addr, id);
3099 __ logical_or(id, LIR_OprFact::longConst(0x01l), id);
3100 __ store(id, trace_id_addr);
3101 __ logical_and(id, LIR_OprFact::longConst(~0x3l), id);
3102 __ move(id, rlock_result(x));
3103 }
3104 #endif
3105
3106 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
3107 switch (x->id()) {
3108 case vmIntrinsics::_intBitsToFloat :
3109 case vmIntrinsics::_doubleToRawLongBits :
3110 case vmIntrinsics::_longBitsToDouble :
3111 case vmIntrinsics::_floatToRawIntBits : {
3112 do_FPIntrinsics(x);
3113 break;
3114 }
3115
3116 #ifdef TRACE_HAVE_INTRINSICS
3117 case vmIntrinsics::_threadID: do_ThreadIDIntrinsic(x); break;
3118 case vmIntrinsics::_classID: do_ClassIDIntrinsic(x); break;
3119 case vmIntrinsics::_counterTime:
3120 do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), 0, x);
3121 break;
3122 #endif
3123
3124 case vmIntrinsics::_currentTimeMillis:
3125 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), 0, x);
3126 break;
3127
3128 case vmIntrinsics::_nanoTime:
3129 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), 0, x);
3130 break;
3131
3132 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
3133 case vmIntrinsics::_isInstance: do_isInstance(x); break;
3134 case vmIntrinsics::_getClass: do_getClass(x); break;
3135 case vmIntrinsics::_currentThread: do_currentThread(x); break;
3136
3137 case vmIntrinsics::_dlog: // fall through
3138 case vmIntrinsics::_dlog10: // fall through
3139 case vmIntrinsics::_dabs: // fall through
3140 case vmIntrinsics::_dsqrt: // fall through
3141 case vmIntrinsics::_dtan: // fall through
3142 case vmIntrinsics::_dsin : // fall through
3143 case vmIntrinsics::_dcos : // fall through
3144 case vmIntrinsics::_dexp : // fall through
3145 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
3146 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
3147
3148 // java.nio.Buffer.checkIndex
3149 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
3150
3151 case vmIntrinsics::_compareAndSwapObject:
3152 do_CompareAndSwap(x, objectType);
3153 break;
3154 case vmIntrinsics::_compareAndSwapInt:
3155 do_CompareAndSwap(x, intType);
3156 break;
3157 case vmIntrinsics::_compareAndSwapLong:
3158 do_CompareAndSwap(x, longType);
3159 break;
3160
3161 case vmIntrinsics::_loadFence :
3162 if (os::is_MP()) __ membar_acquire();
3163 break;
3164 case vmIntrinsics::_storeFence:
3165 if (os::is_MP()) __ membar_release();
3166 break;
3167 case vmIntrinsics::_fullFence :
3168 if (os::is_MP()) __ membar();
3169 break;
3170
3171 case vmIntrinsics::_Reference_get:
3172 do_Reference_get(x);
3173 break;
3174
3175 case vmIntrinsics::_updateCRC32:
3176 case vmIntrinsics::_updateBytesCRC32:
3177 case vmIntrinsics::_updateByteBufferCRC32:
3178 do_update_CRC32(x);
3179 break;
3180
3181 default: ShouldNotReachHere(); break;
3182 }
3183 }
3184
3185 void LIRGenerator::profile_arguments(ProfileCall* x) {
3186 if (compilation()->profile_arguments()) {
3187 int bci = x->bci_of_invoke();
3188 ciMethodData* md = x->method()->method_data_or_null();
3189 ciProfileData* data = md->bci_to_data(bci);
3190 if (data != NULL) {
3191 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3192 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3193 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3194 int base_offset = md->byte_offset_of_slot(data, extra);
3195 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3196 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3197
3198 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3199 int start = 0;
3200 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3201 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3202 // first argument is not profiled at call (method handle invoke)
3203 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3204 start = 1;
3205 }
3206 ciSignature* callee_signature = x->callee()->signature();
3207 // method handle call to virtual method
3208 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3209 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
3210
3211 bool ignored_will_link;
3212 ciSignature* signature_at_call = NULL;
3213 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3214 ciSignatureStream signature_at_call_stream(signature_at_call);
3215
3216 // if called through method handle invoke, some arguments may have been popped
3217 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3218 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3219 ciKlass* exact = profile_type(md, base_offset, off,
3220 args->type(i), x->profiled_arg_at(i+start), mdp,
3221 !x->arg_needs_null_check(i+start),
3222 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3223 if (exact != NULL) {
3224 md->set_argument_type(bci, i, exact);
3225 }
3226 }
3227 } else {
3228 #ifdef ASSERT
3229 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3230 int n = x->nb_profiled_args();
3231 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3232 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3233 "only at JSR292 bytecodes");
3234 #endif
3235 }
3236 }
3237 }
3238 }
3239
3240 // profile parameters on entry to an inlined method
3241 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3242 if (compilation()->profile_parameters() && x->inlined()) {
3243 ciMethodData* md = x->callee()->method_data_or_null();
3244 if (md != NULL) {
3245 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3246 if (parameters_type_data != NULL) {
3247 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3248 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3249 bool has_receiver = !x->callee()->is_static();
3250 ciSignature* sig = x->callee()->signature();
3251 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
3252 int i = 0; // to iterate on the Instructions
3253 Value arg = x->recv();
3254 bool not_null = false;
3255 int bci = x->bci_of_invoke();
3256 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3257 // The first parameter is the receiver so that's what we start
3258 // with if it exists. One exception is method handle call to
3259 // virtual method: the receiver is in the args list
3260 if (arg == NULL || !Bytecodes::has_receiver(bc)) {
3261 i = 1;
3262 arg = x->profiled_arg_at(0);
3263 not_null = !x->arg_needs_null_check(0);
3264 }
3265 int k = 0; // to iterate on the profile data
3266 for (;;) {
3267 intptr_t profiled_k = parameters->type(k);
3268 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3269 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3270 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
3271 // If the profile is known statically set it once for all and do not emit any code
3272 if (exact != NULL) {
3273 md->set_parameter_type(k, exact);
3274 }
3275 k++;
3276 if (k >= parameters_type_data->number_of_parameters()) {
3277 #ifdef ASSERT
3278 int extra = 0;
3279 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3280 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3281 x->recv() != NULL && Bytecodes::has_receiver(bc)) {
3282 extra += 1;
3283 }
3284 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3285 #endif
3286 break;
3287 }
3288 arg = x->profiled_arg_at(i);
3289 not_null = !x->arg_needs_null_check(i);
3290 i++;
3291 }
3292 }
3293 }
3294 }
3295 }
3296
3297 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3298 // Need recv in a temporary register so it interferes with the other temporaries
3299 LIR_Opr recv = LIR_OprFact::illegalOpr;
3300 LIR_Opr mdo = new_register(T_OBJECT);
3301 // tmp is used to hold the counters on SPARC
3302 LIR_Opr tmp = new_pointer_register();
3303
3304 if (x->nb_profiled_args() > 0) {
3305 profile_arguments(x);
3306 }
3307
3308 // profile parameters on inlined method entry including receiver
3309 if (x->recv() != NULL || x->nb_profiled_args() > 0) {
3310 profile_parameters_at_call(x);
3311 }
3312
3313 if (x->recv() != NULL) {
3314 LIRItem value(x->recv(), this);
3315 value.load_item();
3316 recv = new_register(T_OBJECT);
3317 __ move(value.result(), recv);
3318 }
3319 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3320 }
3321
3322 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
3323 int bci = x->bci_of_invoke();
3324 ciMethodData* md = x->method()->method_data_or_null();
3325 ciProfileData* data = md->bci_to_data(bci);
3326 if (data != NULL) {
3327 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3328 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3329 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3330
3331 bool ignored_will_link;
3332 ciSignature* signature_at_call = NULL;
3333 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3334
3335 // The offset within the MDO of the entry to update may be too large
3336 // to be used in load/store instructions on some platforms. So have
3337 // profile_type() compute the address of the profile in a register.
3338 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3339 ret->type(), x->ret(), mdp,
3340 !x->needs_null_check(),
3341 signature_at_call->return_type()->as_klass(),
3342 x->callee()->signature()->return_type()->as_klass());
3343 if (exact != NULL) {
3344 md->set_return_type(bci, exact);
3345 }
3346 }
3347 }
3348
3349 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3350 // We can safely ignore accessors here, since c2 will inline them anyway,
3351 // accessors are also always mature.
3352 if (!x->inlinee()->is_accessor()) {
3353 CodeEmitInfo* info = state_for(x, x->state(), true);
3354 // Notify the runtime very infrequently only to take care of counter overflows
3355 increment_event_counter_impl(info, x->inlinee(), (1 << Tier23InlineeNotifyFreqLog) - 1, InvocationEntryBci, false, true);
3356 }
3357 }
3358
3359 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) {
3360 int freq_log = 0;
3361 int level = compilation()->env()->comp_level();
3362 if (level == CompLevel_limited_profile) {
3363 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3364 } else if (level == CompLevel_full_profile) {
3365 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3366 } else {
3367 ShouldNotReachHere();
3368 }
3369 // Increment the appropriate invocation/backedge counter and notify the runtime.
3370 increment_event_counter_impl(info, info->scope()->method(), (1 << freq_log) - 1, bci, backedge, true);
3371 }
3372
3373 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3374 ciMethod *method, int frequency,
3375 int bci, bool backedge, bool notify) {
3376 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3377 int level = _compilation->env()->comp_level();
3378 assert(level > CompLevel_simple, "Shouldn't be here");
3379
3380 int offset = -1;
3381 LIR_Opr counter_holder = NULL;
3382 if (level == CompLevel_limited_profile) {
3383 MethodCounters* counters_adr = method->ensure_method_counters();
3384 if (counters_adr == NULL) {
3385 bailout("method counters allocation failed");
3386 return;
3387 }
3388 counter_holder = new_pointer_register();
3389 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3390 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3391 MethodCounters::invocation_counter_offset());
3392 } else if (level == CompLevel_full_profile) {
3393 counter_holder = new_register(T_METADATA);
3394 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3395 MethodData::invocation_counter_offset());
3396 ciMethodData* md = method->method_data_or_null();
3397 assert(md != NULL, "Sanity");
3398 __ metadata2reg(md->constant_encoding(), counter_holder);
3399 } else {
3400 ShouldNotReachHere();
3401 }
3402 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3403 LIR_Opr result = new_register(T_INT);
3404 __ load(counter, result);
3405 __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result);
3406 __ store(result, counter);
3407 if (notify) {
3408 LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT);
3409 LIR_Opr meth = new_register(T_METADATA);
3410 __ metadata2reg(method->constant_encoding(), meth);
3411 __ logical_and(result, mask, result);
3412 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3413 // The bci for info can point to cmp for if's we want the if bci
3414 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3415 __ branch(lir_cond_equal, T_INT, overflow);
3416 __ branch_destination(overflow->continuation());
3417 }
3418 }
3419
3420 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3421 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3422 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3423
3424 if (x->pass_thread()) {
3425 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3426 args->append(getThreadPointer());
3427 }
3428
3429 for (int i = 0; i < x->number_of_arguments(); i++) {
3430 Value a = x->argument_at(i);
3431 LIRItem* item = new LIRItem(a, this);
3432 item->load_item();
3433 args->append(item->result());
3434 signature->append(as_BasicType(a->type()));
3435 }
3436
3437 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL);
3438 if (x->type() == voidType) {
3439 set_no_result(x);
3440 } else {
3441 __ move(result, rlock_result(x));
3442 }
3443 }
3444
3445 #ifdef ASSERT
3446 void LIRGenerator::do_Assert(Assert *x) {
3447 ValueTag tag = x->x()->type()->tag();
3448 If::Condition cond = x->cond();
3449
3450 LIRItem xitem(x->x(), this);
3451 LIRItem yitem(x->y(), this);
3452 LIRItem* xin = &xitem;
3453 LIRItem* yin = &yitem;
3454
3455 assert(tag == intTag, "Only integer assertions are valid!");
3456
3457 xin->load_item();
3458 yin->dont_load_item();
3459
3460 set_no_result(x);
3461
3462 LIR_Opr left = xin->result();
3463 LIR_Opr right = yin->result();
3464
3465 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3466 }
3467 #endif
3468
3469 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3470
3471
3472 Instruction *a = x->x();
3473 Instruction *b = x->y();
3474 if (!a || StressRangeCheckElimination) {
3475 assert(!b || StressRangeCheckElimination, "B must also be null");
3476
3477 CodeEmitInfo *info = state_for(x, x->state());
3478 CodeStub* stub = new PredicateFailedStub(info);
3479
3480 __ jump(stub);
3481 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3482 int a_int = a->type()->as_IntConstant()->value();
3483 int b_int = b->type()->as_IntConstant()->value();
3484
3485 bool ok = false;
3486
3487 switch(x->cond()) {
3488 case Instruction::eql: ok = (a_int == b_int); break;
3489 case Instruction::neq: ok = (a_int != b_int); break;
3490 case Instruction::lss: ok = (a_int < b_int); break;
3491 case Instruction::leq: ok = (a_int <= b_int); break;
3492 case Instruction::gtr: ok = (a_int > b_int); break;
3493 case Instruction::geq: ok = (a_int >= b_int); break;
3494 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3495 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3496 default: ShouldNotReachHere();
3497 }
3498
3499 if (ok) {
3500
3501 CodeEmitInfo *info = state_for(x, x->state());
3502 CodeStub* stub = new PredicateFailedStub(info);
3503
3504 __ jump(stub);
3505 }
3506 } else {
3507
3508 ValueTag tag = x->x()->type()->tag();
3509 If::Condition cond = x->cond();
3510 LIRItem xitem(x->x(), this);
3511 LIRItem yitem(x->y(), this);
3512 LIRItem* xin = &xitem;
3513 LIRItem* yin = &yitem;
3514
3515 assert(tag == intTag, "Only integer deoptimizations are valid!");
3516
3517 xin->load_item();
3518 yin->dont_load_item();
3519 set_no_result(x);
3520
3521 LIR_Opr left = xin->result();
3522 LIR_Opr right = yin->result();
3523
3524 CodeEmitInfo *info = state_for(x, x->state());
3525 CodeStub* stub = new PredicateFailedStub(info);
3526
3527 __ cmp(lir_cond(cond), left, right);
3528 __ branch(lir_cond(cond), right->type(), stub);
3529 }
3530 }
3531
3532
3533 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3534 LIRItemList args(1);
3535 LIRItem value(arg1, this);
3536 args.append(&value);
3537 BasicTypeList signature;
3538 signature.append(as_BasicType(arg1->type()));
3539
3540 return call_runtime(&signature, &args, entry, result_type, info);
3541 }
3542
3543
3544 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3545 LIRItemList args(2);
3546 LIRItem value1(arg1, this);
3547 LIRItem value2(arg2, this);
3548 args.append(&value1);
3549 args.append(&value2);
3550 BasicTypeList signature;
3551 signature.append(as_BasicType(arg1->type()));
3552 signature.append(as_BasicType(arg2->type()));
3553
3554 return call_runtime(&signature, &args, entry, result_type, info);
3555 }
3556
3557
3558 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3559 address entry, ValueType* result_type, CodeEmitInfo* info) {
3560 // get a result register
3561 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3562 LIR_Opr result = LIR_OprFact::illegalOpr;
3563 if (result_type->tag() != voidTag) {
3564 result = new_register(result_type);
3565 phys_reg = result_register_for(result_type);
3566 }
3567
3568 // move the arguments into the correct location
3569 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3570 assert(cc->length() == args->length(), "argument mismatch");
3571 for (int i = 0; i < args->length(); i++) {
3572 LIR_Opr arg = args->at(i);
3573 LIR_Opr loc = cc->at(i);
3574 if (loc->is_register()) {
3575 __ move(arg, loc);
3576 } else {
3577 LIR_Address* addr = loc->as_address_ptr();
3578 // if (!can_store_as_constant(arg)) {
3579 // LIR_Opr tmp = new_register(arg->type());
3580 // __ move(arg, tmp);
3581 // arg = tmp;
3582 // }
3583 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3584 __ unaligned_move(arg, addr);
3585 } else {
3586 __ move(arg, addr);
3587 }
3588 }
3589 }
3590
3591 if (info) {
3592 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3593 } else {
3594 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3595 }
3596 if (result->is_valid()) {
3597 __ move(phys_reg, result);
3598 }
3599 return result;
3600 }
3601
3602
3603 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3604 address entry, ValueType* result_type, CodeEmitInfo* info) {
3605 // get a result register
3606 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3607 LIR_Opr result = LIR_OprFact::illegalOpr;
3608 if (result_type->tag() != voidTag) {
3609 result = new_register(result_type);
3610 phys_reg = result_register_for(result_type);
3611 }
3612
3613 // move the arguments into the correct location
3614 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3615
3616 assert(cc->length() == args->length(), "argument mismatch");
3617 for (int i = 0; i < args->length(); i++) {
3618 LIRItem* arg = args->at(i);
3619 LIR_Opr loc = cc->at(i);
3620 if (loc->is_register()) {
3621 arg->load_item_force(loc);
3622 } else {
3623 LIR_Address* addr = loc->as_address_ptr();
3624 arg->load_for_store(addr->type());
3625 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3626 __ unaligned_move(arg->result(), addr);
3627 } else {
3628 __ move(arg->result(), addr);
3629 }
3630 }
3631 }
3632
3633 if (info) {
3634 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3635 } else {
3636 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3637 }
3638 if (result->is_valid()) {
3639 __ move(phys_reg, result);
3640 }
3641 return result;
3642 }
3643
3644 void LIRGenerator::do_MemBar(MemBar* x) {
3645 if (os::is_MP()) {
3646 LIR_Code code = x->code();
3647 switch(code) {
3648 case lir_membar_acquire : __ membar_acquire(); break;
3649 case lir_membar_release : __ membar_release(); break;
3650 case lir_membar : __ membar(); break;
3651 case lir_membar_loadload : __ membar_loadload(); break;
3652 case lir_membar_storestore: __ membar_storestore(); break;
3653 case lir_membar_loadstore : __ membar_loadstore(); break;
3654 case lir_membar_storeload : __ membar_storeload(); break;
3655 default : ShouldNotReachHere(); break;
3656 }
3657 }
3658 }
3659
3660 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3661 if (x->check_boolean()) {
3662 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3663 if (TwoOperandLIRForm) {
3664 __ move(value, value_fixed);
3665 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3666 } else {
3667 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3668 }
3669 LIR_Opr klass = new_register(T_METADATA);
3670 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
3671 null_check_info = NULL;
3672 LIR_Opr layout = new_register(T_INT);
3673 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3674 int diffbit = Klass::layout_helper_boolean_diffbit();
3675 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3676 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3677 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3678 value = value_fixed;
3679 }
3680 return value;
3681 }