1 /*
2 * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_Instruction.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_LIRGenerator.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "ci/ciObjArray.hpp"
36 #include "ci/ciUtilities.hpp"
37 #include "ci/ciValueArrayKlass.hpp"
38 #include "ci/ciValueKlass.hpp"
39 #include "gc/shared/barrierSet.hpp"
40 #include "gc/shared/c1/barrierSetC1.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/vm_version.hpp"
45 #include "utilities/bitMap.inline.hpp"
46 #include "utilities/macros.hpp"
47
48 #ifdef ASSERT
49 #define __ gen()->lir(__FILE__, __LINE__)->
50 #else
51 #define __ gen()->lir()->
52 #endif
53
54 #ifndef PATCHED_ADDR
55 #define PATCHED_ADDR (max_jint)
56 #endif
57
58 void PhiResolverState::reset(int max_vregs) {
59 // Initialize array sizes
60 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL);
61 _virtual_operands.trunc_to(0);
62 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL);
63 _other_operands.trunc_to(0);
64 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL);
65 _vreg_table.trunc_to(0);
66 }
67
68
69
70 //--------------------------------------------------------------
71 // PhiResolver
72
73 // Resolves cycles:
74 //
75 // r1 := r2 becomes temp := r1
76 // r2 := r1 r1 := r2
77 // r2 := temp
78 // and orders moves:
79 //
80 // r2 := r3 becomes r1 := r2
81 // r1 := r2 r2 := r3
82
83 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs)
84 : _gen(gen)
85 , _state(gen->resolver_state())
86 , _temp(LIR_OprFact::illegalOpr)
87 {
88 // reinitialize the shared state arrays
89 _state.reset(max_vregs);
90 }
91
92
93 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
94 assert(src->is_valid(), "");
95 assert(dest->is_valid(), "");
96 __ move(src, dest);
97 }
98
99
100 void PhiResolver::move_temp_to(LIR_Opr dest) {
101 assert(_temp->is_valid(), "");
102 emit_move(_temp, dest);
103 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
104 }
105
106
107 void PhiResolver::move_to_temp(LIR_Opr src) {
108 assert(_temp->is_illegal(), "");
109 _temp = _gen->new_register(src->type());
110 emit_move(src, _temp);
111 }
112
113
114 // Traverse assignment graph in depth first order and generate moves in post order
115 // ie. two assignments: b := c, a := b start with node c:
116 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a)
117 // Generates moves in this order: move b to a and move c to b
118 // ie. cycle a := b, b := a start with node a
119 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a)
120 // Generates moves in this order: move b to temp, move a to b, move temp to a
121 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
122 if (!dest->visited()) {
123 dest->set_visited();
124 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
125 move(dest, dest->destination_at(i));
126 }
127 } else if (!dest->start_node()) {
128 // cylce in graph detected
129 assert(_loop == NULL, "only one loop valid!");
130 _loop = dest;
131 move_to_temp(src->operand());
132 return;
133 } // else dest is a start node
134
135 if (!dest->assigned()) {
136 if (_loop == dest) {
137 move_temp_to(dest->operand());
138 dest->set_assigned();
139 } else if (src != NULL) {
140 emit_move(src->operand(), dest->operand());
141 dest->set_assigned();
142 }
143 }
144 }
145
146
147 PhiResolver::~PhiResolver() {
148 int i;
149 // resolve any cycles in moves from and to virtual registers
150 for (i = virtual_operands().length() - 1; i >= 0; i --) {
151 ResolveNode* node = virtual_operands().at(i);
152 if (!node->visited()) {
153 _loop = NULL;
154 move(NULL, node);
155 node->set_start_node();
156 assert(_temp->is_illegal(), "move_temp_to() call missing");
157 }
158 }
159
160 // generate move for move from non virtual register to abitrary destination
161 for (i = other_operands().length() - 1; i >= 0; i --) {
162 ResolveNode* node = other_operands().at(i);
163 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
164 emit_move(node->operand(), node->destination_at(j)->operand());
165 }
166 }
167 }
168
169
170 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
171 ResolveNode* node;
172 if (opr->is_virtual()) {
173 int vreg_num = opr->vreg_number();
174 node = vreg_table().at_grow(vreg_num, NULL);
175 assert(node == NULL || node->operand() == opr, "");
176 if (node == NULL) {
177 node = new ResolveNode(opr);
178 vreg_table().at_put(vreg_num, node);
179 }
180 // Make sure that all virtual operands show up in the list when
181 // they are used as the source of a move.
182 if (source && !virtual_operands().contains(node)) {
183 virtual_operands().append(node);
184 }
185 } else {
186 assert(source, "");
187 node = new ResolveNode(opr);
188 other_operands().append(node);
189 }
190 return node;
191 }
192
193
194 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
195 assert(dest->is_virtual(), "");
196 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
197 assert(src->is_valid(), "");
198 assert(dest->is_valid(), "");
199 ResolveNode* source = source_node(src);
200 source->append(destination_node(dest));
201 }
202
203
204 //--------------------------------------------------------------
205 // LIRItem
206
207 void LIRItem::set_result(LIR_Opr opr) {
208 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
209 value()->set_operand(opr);
210
211 if (opr->is_virtual()) {
212 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL);
213 }
214
215 _result = opr;
216 }
217
218 void LIRItem::load_item() {
219 if (result()->is_illegal()) {
220 // update the items result
221 _result = value()->operand();
222 }
223 if (!result()->is_register()) {
224 LIR_Opr reg = _gen->new_register(value()->type());
225 __ move(result(), reg);
226 if (result()->is_constant()) {
227 _result = reg;
228 } else {
229 set_result(reg);
230 }
231 }
232 }
233
234
235 void LIRItem::load_for_store(BasicType type) {
236 if (_gen->can_store_as_constant(value(), type)) {
237 _result = value()->operand();
238 if (!_result->is_constant()) {
239 _result = LIR_OprFact::value_type(value()->type());
240 }
241 } else if (type == T_BYTE || type == T_BOOLEAN) {
242 load_byte_item();
243 } else {
244 load_item();
245 }
246 }
247
248 void LIRItem::load_item_force(LIR_Opr reg) {
249 LIR_Opr r = result();
250 if (r != reg) {
251 #if !defined(ARM) && !defined(E500V2)
252 if (r->type() != reg->type()) {
253 // moves between different types need an intervening spill slot
254 r = _gen->force_to_spill(r, reg->type());
255 }
256 #endif
257 __ move(r, reg);
258 _result = reg;
259 }
260 }
261
262 ciObject* LIRItem::get_jobject_constant() const {
263 ObjectType* oc = type()->as_ObjectType();
264 if (oc) {
265 return oc->constant_value();
266 }
267 return NULL;
268 }
269
270
271 jint LIRItem::get_jint_constant() const {
272 assert(is_constant() && value() != NULL, "");
273 assert(type()->as_IntConstant() != NULL, "type check");
274 return type()->as_IntConstant()->value();
275 }
276
277
278 jint LIRItem::get_address_constant() const {
279 assert(is_constant() && value() != NULL, "");
280 assert(type()->as_AddressConstant() != NULL, "type check");
281 return type()->as_AddressConstant()->value();
282 }
283
284
285 jfloat LIRItem::get_jfloat_constant() const {
286 assert(is_constant() && value() != NULL, "");
287 assert(type()->as_FloatConstant() != NULL, "type check");
288 return type()->as_FloatConstant()->value();
289 }
290
291
292 jdouble LIRItem::get_jdouble_constant() const {
293 assert(is_constant() && value() != NULL, "");
294 assert(type()->as_DoubleConstant() != NULL, "type check");
295 return type()->as_DoubleConstant()->value();
296 }
297
298
299 jlong LIRItem::get_jlong_constant() const {
300 assert(is_constant() && value() != NULL, "");
301 assert(type()->as_LongConstant() != NULL, "type check");
302 return type()->as_LongConstant()->value();
303 }
304
305
306
307 //--------------------------------------------------------------
308
309
310 void LIRGenerator::block_do_prolog(BlockBegin* block) {
311 #ifndef PRODUCT
312 if (PrintIRWithLIR) {
313 block->print();
314 }
315 #endif
316
317 // set up the list of LIR instructions
318 assert(block->lir() == NULL, "LIR list already computed for this block");
319 _lir = new LIR_List(compilation(), block);
320 block->set_lir(_lir);
321
322 __ branch_destination(block->label());
323
324 if (LIRTraceExecution &&
325 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
326 !block->is_set(BlockBegin::exception_entry_flag)) {
327 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
328 trace_block_entry(block);
329 }
330 }
331
332
333 void LIRGenerator::block_do_epilog(BlockBegin* block) {
334 #ifndef PRODUCT
335 if (PrintIRWithLIR) {
336 tty->cr();
337 }
338 #endif
339
340 // LIR_Opr for unpinned constants shouldn't be referenced by other
341 // blocks so clear them out after processing the block.
342 for (int i = 0; i < _unpinned_constants.length(); i++) {
343 _unpinned_constants.at(i)->clear_operand();
344 }
345 _unpinned_constants.trunc_to(0);
346
347 // clear our any registers for other local constants
348 _constants.trunc_to(0);
349 _reg_for_constants.trunc_to(0);
350 }
351
352
353 void LIRGenerator::block_do(BlockBegin* block) {
354 CHECK_BAILOUT();
355
356 block_do_prolog(block);
357 set_block(block);
358
359 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
360 if (instr->is_pinned()) do_root(instr);
361 }
362
363 set_block(NULL);
364 block_do_epilog(block);
365 }
366
367
368 //-------------------------LIRGenerator-----------------------------
369
370 // This is where the tree-walk starts; instr must be root;
371 void LIRGenerator::do_root(Value instr) {
372 CHECK_BAILOUT();
373
374 InstructionMark im(compilation(), instr);
375
376 assert(instr->is_pinned(), "use only with roots");
377 assert(instr->subst() == instr, "shouldn't have missed substitution");
378
379 instr->visit(this);
380
381 assert(!instr->has_uses() || instr->operand()->is_valid() ||
382 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
383 }
384
385
386 // This is called for each node in tree; the walk stops if a root is reached
387 void LIRGenerator::walk(Value instr) {
388 InstructionMark im(compilation(), instr);
389 //stop walk when encounter a root
390 if ((instr->is_pinned() && instr->as_Phi() == NULL) || instr->operand()->is_valid()) {
391 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
392 } else {
393 assert(instr->subst() == instr, "shouldn't have missed substitution");
394 instr->visit(this);
395 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
396 }
397 }
398
399
400 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
401 assert(state != NULL, "state must be defined");
402
403 #ifndef PRODUCT
404 state->verify();
405 #endif
406
407 ValueStack* s = state;
408 for_each_state(s) {
409 if (s->kind() == ValueStack::EmptyExceptionState) {
410 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty");
411 continue;
412 }
413
414 int index;
415 Value value;
416 for_each_stack_value(s, index, value) {
417 assert(value->subst() == value, "missed substitution");
418 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
419 walk(value);
420 assert(value->operand()->is_valid(), "must be evaluated now");
421 }
422 }
423
424 int bci = s->bci();
425 IRScope* scope = s->scope();
426 ciMethod* method = scope->method();
427
428 MethodLivenessResult liveness = method->liveness_at_bci(bci);
429 if (bci == SynchronizationEntryBCI) {
430 if (x->as_ExceptionObject() || x->as_Throw()) {
431 // all locals are dead on exit from the synthetic unlocker
432 liveness.clear();
433 } else {
434 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
435 }
436 }
437 if (!liveness.is_valid()) {
438 // Degenerate or breakpointed method.
439 bailout("Degenerate or breakpointed method");
440 } else {
441 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
442 for_each_local_value(s, index, value) {
443 assert(value->subst() == value, "missed substition");
444 if (liveness.at(index) && !value->type()->is_illegal()) {
445 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
446 walk(value);
447 assert(value->operand()->is_valid(), "must be evaluated now");
448 }
449 } else {
450 // NULL out this local so that linear scan can assume that all non-NULL values are live.
451 s->invalidate_local(index);
452 }
453 }
454 }
455 }
456
457 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
458 }
459
460
461 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
462 return state_for(x, x->exception_state());
463 }
464
465
466 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
467 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation
468 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
469 * the class. */
470 if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) {
471 assert(info != NULL, "info must be set if class is not loaded");
472 __ klass2reg_patch(NULL, r, info);
473 } else {
474 // no patching needed
475 __ metadata2reg(obj->constant_encoding(), r);
476 }
477 }
478
479
480 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
481 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
482 CodeStub* stub = new RangeCheckStub(range_check_info, index, array);
483 if (index->is_constant()) {
484 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
485 index->as_jint(), null_check_info);
486 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
487 } else {
488 cmp_reg_mem(lir_cond_aboveEqual, index, array,
489 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
490 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
491 }
492 }
493
494
495 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
496 CodeStub* stub = new RangeCheckStub(info, index);
497 if (index->is_constant()) {
498 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
499 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
500 } else {
501 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
502 java_nio_Buffer::limit_offset(), T_INT, info);
503 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
504 }
505 __ move(index, result);
506 }
507
508
509
510 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) {
511 LIR_Opr result_op = result;
512 LIR_Opr left_op = left;
513 LIR_Opr right_op = right;
514
515 if (TwoOperandLIRForm && left_op != result_op) {
516 assert(right_op != result_op, "malformed");
517 __ move(left_op, result_op);
518 left_op = result_op;
519 }
520
521 switch(code) {
522 case Bytecodes::_dadd:
523 case Bytecodes::_fadd:
524 case Bytecodes::_ladd:
525 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
526 case Bytecodes::_fmul:
527 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
528
529 case Bytecodes::_dmul:
530 {
531 if (is_strictfp) {
532 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break;
533 } else {
534 __ mul(left_op, right_op, result_op); break;
535 }
536 }
537 break;
538
539 case Bytecodes::_imul:
540 {
541 bool did_strength_reduce = false;
542
543 if (right->is_constant()) {
544 jint c = right->as_jint();
545 if (c > 0 && is_power_of_2(c)) {
546 // do not need tmp here
547 __ shift_left(left_op, exact_log2(c), result_op);
548 did_strength_reduce = true;
549 } else {
550 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
551 }
552 }
553 // we couldn't strength reduce so just emit the multiply
554 if (!did_strength_reduce) {
555 __ mul(left_op, right_op, result_op);
556 }
557 }
558 break;
559
560 case Bytecodes::_dsub:
561 case Bytecodes::_fsub:
562 case Bytecodes::_lsub:
563 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
564
565 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
566 // ldiv and lrem are implemented with a direct runtime call
567
568 case Bytecodes::_ddiv:
569 {
570 if (is_strictfp) {
571 __ div_strictfp (left_op, right_op, result_op, tmp_op); break;
572 } else {
573 __ div (left_op, right_op, result_op); break;
574 }
575 }
576 break;
577
578 case Bytecodes::_drem:
579 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
580
581 default: ShouldNotReachHere();
582 }
583 }
584
585
586 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
587 arithmetic_op(code, result, left, right, false, tmp);
588 }
589
590
591 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
592 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info);
593 }
594
595
596 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) {
597 arithmetic_op(code, result, left, right, is_strictfp, tmp);
598 }
599
600
601 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
602
603 if (TwoOperandLIRForm && value != result_op
604 // Only 32bit right shifts require two operand form on S390.
605 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) {
606 assert(count != result_op, "malformed");
607 __ move(value, result_op);
608 value = result_op;
609 }
610
611 assert(count->is_constant() || count->is_register(), "must be");
612 switch(code) {
613 case Bytecodes::_ishl:
614 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
615 case Bytecodes::_ishr:
616 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
617 case Bytecodes::_iushr:
618 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
619 default: ShouldNotReachHere();
620 }
621 }
622
623
624 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
625 if (TwoOperandLIRForm && left_op != result_op) {
626 assert(right_op != result_op, "malformed");
627 __ move(left_op, result_op);
628 left_op = result_op;
629 }
630
631 switch(code) {
632 case Bytecodes::_iand:
633 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
634
635 case Bytecodes::_ior:
636 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
637
638 case Bytecodes::_ixor:
639 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
640
641 default: ShouldNotReachHere();
642 }
643 }
644
645
646 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no,
647 CodeEmitInfo* info_for_exception, CodeEmitInfo* info, CodeStub* throw_imse_stub) {
648 if (!GenerateSynchronizationCode) return;
649 // for slow path, use debug info for state after successful locking
650 CodeStub* slow_path = new MonitorEnterStub(object, lock, info, throw_imse_stub, scratch);
651 __ load_stack_address_monitor(monitor_no, lock);
652 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
653 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception, throw_imse_stub);
654 }
655
656
657 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
658 if (!GenerateSynchronizationCode) return;
659 // setup registers
660 LIR_Opr hdr = lock;
661 lock = new_hdr;
662 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no);
663 __ load_stack_address_monitor(monitor_no, lock);
664 __ unlock_object(hdr, object, lock, scratch, slow_path);
665 }
666
667 #ifndef PRODUCT
668 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
669 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
670 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
671 } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) {
672 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
673 }
674 }
675 #endif
676
677 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) {
678 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
679 // If klass is not loaded we do not know if the klass has finalizers:
680 if (UseFastNewInstance && klass->is_loaded()
681 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
682
683 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
684
685 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
686
687 assert(klass->is_loaded(), "must be loaded");
688 // allocate space for instance
689 assert(klass->size_helper() >= 0, "illegal instance size");
690 const int instance_size = align_object_size(klass->size_helper());
691 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
692 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
693 } else {
694 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
695 __ branch(lir_cond_always, T_ILLEGAL, slow_path);
696 __ branch_destination(slow_path->continuation());
697 }
698 }
699
700
701 static bool is_constant_zero(Instruction* inst) {
702 IntConstant* c = inst->type()->as_IntConstant();
703 if (c) {
704 return (c->value() == 0);
705 }
706 return false;
707 }
708
709
710 static bool positive_constant(Instruction* inst) {
711 IntConstant* c = inst->type()->as_IntConstant();
712 if (c) {
713 return (c->value() >= 0);
714 }
715 return false;
716 }
717
718
719 static ciArrayKlass* as_array_klass(ciType* type) {
720 if (type != NULL && type->is_array_klass() && type->is_loaded()) {
721 return (ciArrayKlass*)type;
722 } else {
723 return NULL;
724 }
725 }
726
727 static ciType* phi_declared_type(Phi* phi) {
728 ciType* t = phi->operand_at(0)->declared_type();
729 if (t == NULL) {
730 return NULL;
731 }
732 for(int i = 1; i < phi->operand_count(); i++) {
733 if (t != phi->operand_at(i)->declared_type()) {
734 return NULL;
735 }
736 }
737 return t;
738 }
739
740 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
741 Instruction* src = x->argument_at(0);
742 Instruction* src_pos = x->argument_at(1);
743 Instruction* dst = x->argument_at(2);
744 Instruction* dst_pos = x->argument_at(3);
745 Instruction* length = x->argument_at(4);
746
747 // first try to identify the likely type of the arrays involved
748 ciArrayKlass* expected_type = NULL;
749 bool is_exact = false, src_objarray = false, dst_objarray = false;
750 {
751 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
752 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
753 Phi* phi;
754 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) {
755 src_declared_type = as_array_klass(phi_declared_type(phi));
756 }
757 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
758 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
759 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) {
760 dst_declared_type = as_array_klass(phi_declared_type(phi));
761 }
762
763 if (src_exact_type != NULL && src_exact_type == dst_exact_type) {
764 // the types exactly match so the type is fully known
765 is_exact = true;
766 expected_type = src_exact_type;
767 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) {
768 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
769 ciArrayKlass* src_type = NULL;
770 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) {
771 src_type = (ciArrayKlass*) src_exact_type;
772 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) {
773 src_type = (ciArrayKlass*) src_declared_type;
774 }
775 if (src_type != NULL) {
776 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
777 is_exact = true;
778 expected_type = dst_type;
779 }
780 }
781 }
782 // at least pass along a good guess
783 if (expected_type == NULL) expected_type = dst_exact_type;
784 if (expected_type == NULL) expected_type = src_declared_type;
785 if (expected_type == NULL) expected_type = dst_declared_type;
786
787 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
788 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
789 }
790
791 // if a probable array type has been identified, figure out if any
792 // of the required checks for a fast case can be elided.
793 int flags = LIR_OpArrayCopy::all_flags;
794
795 if (!src->is_loaded_flattened_array() && !dst->is_loaded_flattened_array()) {
796 flags &= ~LIR_OpArrayCopy::always_slow_path;
797 }
798 if (!src->maybe_flattened_array()) {
799 flags &= ~LIR_OpArrayCopy::src_flat_check;
800 }
801 if (!dst->maybe_flattened_array()) {
802 flags &= ~LIR_OpArrayCopy::dst_flat_check;
803 }
804
805 if (!src_objarray)
806 flags &= ~LIR_OpArrayCopy::src_objarray;
807 if (!dst_objarray)
808 flags &= ~LIR_OpArrayCopy::dst_objarray;
809
810 if (!x->arg_needs_null_check(0))
811 flags &= ~LIR_OpArrayCopy::src_null_check;
812 if (!x->arg_needs_null_check(2))
813 flags &= ~LIR_OpArrayCopy::dst_null_check;
814
815
816 if (expected_type != NULL) {
817 Value length_limit = NULL;
818
819 IfOp* ifop = length->as_IfOp();
820 if (ifop != NULL) {
821 // look for expressions like min(v, a.length) which ends up as
822 // x > y ? y : x or x >= y ? y : x
823 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
824 ifop->x() == ifop->fval() &&
825 ifop->y() == ifop->tval()) {
826 length_limit = ifop->y();
827 }
828 }
829
830 // try to skip null checks and range checks
831 NewArray* src_array = src->as_NewArray();
832 if (src_array != NULL) {
833 flags &= ~LIR_OpArrayCopy::src_null_check;
834 if (length_limit != NULL &&
835 src_array->length() == length_limit &&
836 is_constant_zero(src_pos)) {
837 flags &= ~LIR_OpArrayCopy::src_range_check;
838 }
839 }
840
841 NewArray* dst_array = dst->as_NewArray();
842 if (dst_array != NULL) {
843 flags &= ~LIR_OpArrayCopy::dst_null_check;
844 if (length_limit != NULL &&
845 dst_array->length() == length_limit &&
846 is_constant_zero(dst_pos)) {
847 flags &= ~LIR_OpArrayCopy::dst_range_check;
848 }
849 }
850
851 // check from incoming constant values
852 if (positive_constant(src_pos))
853 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
854 if (positive_constant(dst_pos))
855 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
856 if (positive_constant(length))
857 flags &= ~LIR_OpArrayCopy::length_positive_check;
858
859 // see if the range check can be elided, which might also imply
860 // that src or dst is non-null.
861 ArrayLength* al = length->as_ArrayLength();
862 if (al != NULL) {
863 if (al->array() == src) {
864 // it's the length of the source array
865 flags &= ~LIR_OpArrayCopy::length_positive_check;
866 flags &= ~LIR_OpArrayCopy::src_null_check;
867 if (is_constant_zero(src_pos))
868 flags &= ~LIR_OpArrayCopy::src_range_check;
869 }
870 if (al->array() == dst) {
871 // it's the length of the destination array
872 flags &= ~LIR_OpArrayCopy::length_positive_check;
873 flags &= ~LIR_OpArrayCopy::dst_null_check;
874 if (is_constant_zero(dst_pos))
875 flags &= ~LIR_OpArrayCopy::dst_range_check;
876 }
877 }
878 if (is_exact) {
879 flags &= ~LIR_OpArrayCopy::type_check;
880 }
881 }
882
883 IntConstant* src_int = src_pos->type()->as_IntConstant();
884 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
885 if (src_int && dst_int) {
886 int s_offs = src_int->value();
887 int d_offs = dst_int->value();
888 if (src_int->value() >= dst_int->value()) {
889 flags &= ~LIR_OpArrayCopy::overlapping;
890 }
891 if (expected_type != NULL) {
892 BasicType t = expected_type->element_type()->basic_type();
893 int element_size = type2aelembytes(t);
894 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) &&
895 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) {
896 flags &= ~LIR_OpArrayCopy::unaligned;
897 }
898 }
899 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
900 // src and dest positions are the same, or dst is zero so assume
901 // nonoverlapping copy.
902 flags &= ~LIR_OpArrayCopy::overlapping;
903 }
904
905 if (src == dst) {
906 // moving within a single array so no type checks are needed
907 if (flags & LIR_OpArrayCopy::type_check) {
908 flags &= ~LIR_OpArrayCopy::type_check;
909 }
910 }
911 *flagsp = flags;
912 *expected_typep = (ciArrayKlass*)expected_type;
913 }
914
915
916 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
917 assert(opr->is_register(), "why spill if item is not register?");
918
919 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) {
920 LIR_Opr result = new_register(T_FLOAT);
921 set_vreg_flag(result, must_start_in_memory);
922 assert(opr->is_register(), "only a register can be spilled");
923 assert(opr->value_type()->is_float(), "rounding only for floats available");
924 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
925 return result;
926 }
927 return opr;
928 }
929
930
931 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
932 assert(type2size[t] == type2size[value->type()],
933 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()));
934 if (!value->is_register()) {
935 // force into a register
936 LIR_Opr r = new_register(value->type());
937 __ move(value, r);
938 value = r;
939 }
940
941 // create a spill location
942 LIR_Opr tmp = new_register(t);
943 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
944
945 // move from register to spill
946 __ move(value, tmp);
947 return tmp;
948 }
949
950 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
951 if (if_instr->should_profile()) {
952 ciMethod* method = if_instr->profiled_method();
953 assert(method != NULL, "method should be set if branch is profiled");
954 ciMethodData* md = method->method_data_or_null();
955 assert(md != NULL, "Sanity");
956 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
957 assert(data != NULL, "must have profiling data");
958 assert(data->is_BranchData(), "need BranchData for two-way branches");
959 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
960 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
961 if (if_instr->is_swapped()) {
962 int t = taken_count_offset;
963 taken_count_offset = not_taken_count_offset;
964 not_taken_count_offset = t;
965 }
966
967 LIR_Opr md_reg = new_register(T_METADATA);
968 __ metadata2reg(md->constant_encoding(), md_reg);
969
970 LIR_Opr data_offset_reg = new_pointer_register();
971 __ cmove(lir_cond(cond),
972 LIR_OprFact::intptrConst(taken_count_offset),
973 LIR_OprFact::intptrConst(not_taken_count_offset),
974 data_offset_reg, as_BasicType(if_instr->x()->type()));
975
976 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
977 LIR_Opr data_reg = new_pointer_register();
978 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
979 __ move(data_addr, data_reg);
980 // Use leal instead of add to avoid destroying condition codes on x86
981 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
982 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
983 __ move(data_reg, data_addr);
984 }
985 }
986
987 // Phi technique:
988 // This is about passing live values from one basic block to the other.
989 // In code generated with Java it is rather rare that more than one
990 // value is on the stack from one basic block to the other.
991 // We optimize our technique for efficient passing of one value
992 // (of type long, int, double..) but it can be extended.
993 // When entering or leaving a basic block, all registers and all spill
994 // slots are release and empty. We use the released registers
995 // and spill slots to pass the live values from one block
996 // to the other. The topmost value, i.e., the value on TOS of expression
997 // stack is passed in registers. All other values are stored in spilling
998 // area. Every Phi has an index which designates its spill slot
999 // At exit of a basic block, we fill the register(s) and spill slots.
1000 // At entry of a basic block, the block_prolog sets up the content of phi nodes
1001 // and locks necessary registers and spilling slots.
1002
1003
1004 // move current value to referenced phi function
1005 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
1006 Phi* phi = sux_val->as_Phi();
1007 // cur_val can be null without phi being null in conjunction with inlining
1008 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) {
1009 Phi* cur_phi = cur_val->as_Phi();
1010 if (cur_phi != NULL && cur_phi->is_illegal()) {
1011 // Phi and local would need to get invalidated
1012 // (which is unexpected for Linear Scan).
1013 // But this case is very rare so we simply bail out.
1014 bailout("propagation of illegal phi");
1015 return;
1016 }
1017 LIR_Opr operand = cur_val->operand();
1018 if (operand->is_illegal()) {
1019 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
1020 "these can be produced lazily");
1021 operand = operand_for_instruction(cur_val);
1022 }
1023 resolver->move(operand, operand_for_instruction(phi));
1024 }
1025 }
1026
1027
1028 // Moves all stack values into their PHI position
1029 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1030 BlockBegin* bb = block();
1031 if (bb->number_of_sux() == 1) {
1032 BlockBegin* sux = bb->sux_at(0);
1033 assert(sux->number_of_preds() > 0, "invalid CFG");
1034
1035 // a block with only one predecessor never has phi functions
1036 if (sux->number_of_preds() > 1) {
1037 int max_phis = cur_state->stack_size() + cur_state->locals_size();
1038 PhiResolver resolver(this, _virtual_register_number + max_phis * 2);
1039
1040 ValueStack* sux_state = sux->state();
1041 Value sux_value;
1042 int index;
1043
1044 assert(cur_state->scope() == sux_state->scope(), "not matching");
1045 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1046 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1047
1048 for_each_stack_value(sux_state, index, sux_value) {
1049 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1050 }
1051
1052 for_each_local_value(sux_state, index, sux_value) {
1053 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1054 }
1055
1056 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1057 }
1058 }
1059 }
1060
1061
1062 LIR_Opr LIRGenerator::new_register(BasicType type) {
1063 int vreg = _virtual_register_number;
1064 // add a little fudge factor for the bailout, since the bailout is
1065 // only checked periodically. This gives a few extra registers to
1066 // hand out before we really run out, which helps us keep from
1067 // tripping over assertions.
1068 if (vreg + 20 >= LIR_OprDesc::vreg_max) {
1069 bailout("out of virtual registers");
1070 if (vreg + 2 >= LIR_OprDesc::vreg_max) {
1071 // wrap it around
1072 _virtual_register_number = LIR_OprDesc::vreg_base;
1073 }
1074 }
1075 _virtual_register_number += 1;
1076 return LIR_OprFact::virtual_register(vreg, type);
1077 }
1078
1079
1080 // Try to lock using register in hint
1081 LIR_Opr LIRGenerator::rlock(Value instr) {
1082 return new_register(instr->type());
1083 }
1084
1085
1086 // does an rlock and sets result
1087 LIR_Opr LIRGenerator::rlock_result(Value x) {
1088 LIR_Opr reg = rlock(x);
1089 set_result(x, reg);
1090 return reg;
1091 }
1092
1093
1094 // does an rlock and sets result
1095 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1096 LIR_Opr reg;
1097 switch (type) {
1098 case T_BYTE:
1099 case T_BOOLEAN:
1100 reg = rlock_byte(type);
1101 break;
1102 default:
1103 reg = rlock(x);
1104 break;
1105 }
1106
1107 set_result(x, reg);
1108 return reg;
1109 }
1110
1111
1112 //---------------------------------------------------------------------
1113 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1114 ObjectType* oc = value->type()->as_ObjectType();
1115 if (oc) {
1116 return oc->constant_value();
1117 }
1118 return NULL;
1119 }
1120
1121
1122 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1123 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1124 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1125
1126 // no moves are created for phi functions at the begin of exception
1127 // handlers, so assign operands manually here
1128 for_each_phi_fun(block(), phi,
1129 if (!phi->is_illegal()) { operand_for_instruction(phi); });
1130
1131 LIR_Opr thread_reg = getThreadPointer();
1132 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1133 exceptionOopOpr());
1134 __ move_wide(LIR_OprFact::oopConst(NULL),
1135 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1136 __ move_wide(LIR_OprFact::oopConst(NULL),
1137 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1138
1139 LIR_Opr result = new_register(T_OBJECT);
1140 __ move(exceptionOopOpr(), result);
1141 set_result(x, result);
1142 }
1143
1144
1145 //----------------------------------------------------------------------
1146 //----------------------------------------------------------------------
1147 //----------------------------------------------------------------------
1148 //----------------------------------------------------------------------
1149 // visitor functions
1150 //----------------------------------------------------------------------
1151 //----------------------------------------------------------------------
1152 //----------------------------------------------------------------------
1153 //----------------------------------------------------------------------
1154
1155 void LIRGenerator::do_Phi(Phi* x) {
1156 // phi functions are never visited directly
1157 ShouldNotReachHere();
1158 }
1159
1160
1161 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1162 void LIRGenerator::do_Constant(Constant* x) {
1163 if (x->state_before() != NULL) {
1164 // Any constant with a ValueStack requires patching so emit the patch here
1165 LIR_Opr reg = rlock_result(x);
1166 CodeEmitInfo* info = state_for(x, x->state_before());
1167 __ oop2reg_patch(NULL, reg, info);
1168 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1169 if (!x->is_pinned()) {
1170 // unpinned constants are handled specially so that they can be
1171 // put into registers when they are used multiple times within a
1172 // block. After the block completes their operand will be
1173 // cleared so that other blocks can't refer to that register.
1174 set_result(x, load_constant(x));
1175 } else {
1176 LIR_Opr res = x->operand();
1177 if (!res->is_valid()) {
1178 res = LIR_OprFact::value_type(x->type());
1179 }
1180 if (res->is_constant()) {
1181 LIR_Opr reg = rlock_result(x);
1182 __ move(res, reg);
1183 } else {
1184 set_result(x, res);
1185 }
1186 }
1187 } else {
1188 set_result(x, LIR_OprFact::value_type(x->type()));
1189 }
1190 }
1191
1192
1193 void LIRGenerator::do_Local(Local* x) {
1194 // operand_for_instruction has the side effect of setting the result
1195 // so there's no need to do it here.
1196 operand_for_instruction(x);
1197 }
1198
1199
1200 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) {
1201 Unimplemented();
1202 }
1203
1204
1205 void LIRGenerator::do_Return(Return* x) {
1206 if (compilation()->env()->dtrace_method_probes()) {
1207 BasicTypeList signature;
1208 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1209 signature.append(T_METADATA); // Method*
1210 LIR_OprList* args = new LIR_OprList();
1211 args->append(getThreadPointer());
1212 LIR_Opr meth = new_register(T_METADATA);
1213 __ metadata2reg(method()->constant_encoding(), meth);
1214 args->append(meth);
1215 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
1216 }
1217
1218 if (x->type()->is_void()) {
1219 __ return_op(LIR_OprFact::illegalOpr);
1220 } else {
1221 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1222 LIRItem result(x->result(), this);
1223
1224 result.load_item_force(reg);
1225 __ return_op(result.result());
1226 }
1227 set_no_result(x);
1228 }
1229
1230 // Examble: ref.get()
1231 // Combination of LoadField and g1 pre-write barrier
1232 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1233
1234 const int referent_offset = java_lang_ref_Reference::referent_offset;
1235 guarantee(referent_offset > 0, "referent offset not initialized");
1236
1237 assert(x->number_of_arguments() == 1, "wrong type");
1238
1239 LIRItem reference(x->argument_at(0), this);
1240 reference.load_item();
1241
1242 // need to perform the null check on the reference objecy
1243 CodeEmitInfo* info = NULL;
1244 if (x->needs_null_check()) {
1245 info = state_for(x);
1246 }
1247
1248 LIR_Opr result = rlock_result(x, T_OBJECT);
1249 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT,
1250 reference, LIR_OprFact::intConst(referent_offset), result);
1251 }
1252
1253 // Example: clazz.isInstance(object)
1254 void LIRGenerator::do_isInstance(Intrinsic* x) {
1255 assert(x->number_of_arguments() == 2, "wrong type");
1256
1257 // TODO could try to substitute this node with an equivalent InstanceOf
1258 // if clazz is known to be a constant Class. This will pick up newly found
1259 // constants after HIR construction. I'll leave this to a future change.
1260
1261 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1262 // could follow the aastore example in a future change.
1263
1264 LIRItem clazz(x->argument_at(0), this);
1265 LIRItem object(x->argument_at(1), this);
1266 clazz.load_item();
1267 object.load_item();
1268 LIR_Opr result = rlock_result(x);
1269
1270 // need to perform null check on clazz
1271 if (x->needs_null_check()) {
1272 CodeEmitInfo* info = state_for(x);
1273 __ null_check(clazz.result(), info);
1274 }
1275
1276 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1277 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1278 x->type(),
1279 NULL); // NULL CodeEmitInfo results in a leaf call
1280 __ move(call_result, result);
1281 }
1282
1283 // Example: object.getClass ()
1284 void LIRGenerator::do_getClass(Intrinsic* x) {
1285 assert(x->number_of_arguments() == 1, "wrong type");
1286
1287 LIRItem rcvr(x->argument_at(0), this);
1288 rcvr.load_item();
1289 LIR_Opr temp = new_register(T_METADATA);
1290 LIR_Opr result = rlock_result(x);
1291
1292 // need to perform the null check on the rcvr
1293 CodeEmitInfo* info = NULL;
1294 if (x->needs_null_check()) {
1295 info = state_for(x);
1296 }
1297
1298 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
1299 // meaning of these two is mixed up (see JDK-8026837).
1300 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1301 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp);
1302 // mirror = ((OopHandle)mirror)->resolve();
1303 access_load(IN_NATIVE, T_OBJECT,
1304 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result);
1305 }
1306
1307 // java.lang.Class::isPrimitive()
1308 void LIRGenerator::do_isPrimitive(Intrinsic* x) {
1309 assert(x->number_of_arguments() == 1, "wrong type");
1310
1311 LIRItem rcvr(x->argument_at(0), this);
1312 rcvr.load_item();
1313 LIR_Opr temp = new_register(T_METADATA);
1314 LIR_Opr result = rlock_result(x);
1315
1316 CodeEmitInfo* info = NULL;
1317 if (x->needs_null_check()) {
1318 info = state_for(x);
1319 }
1320
1321 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1322 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::intConst(0));
1323 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN);
1324 }
1325
1326
1327 // Example: Thread.currentThread()
1328 void LIRGenerator::do_currentThread(Intrinsic* x) {
1329 assert(x->number_of_arguments() == 0, "wrong type");
1330 LIR_Opr reg = rlock_result(x);
1331 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg);
1332 }
1333
1334
1335 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1336 assert(x->number_of_arguments() == 1, "wrong type");
1337 LIRItem receiver(x->argument_at(0), this);
1338
1339 receiver.load_item();
1340 BasicTypeList signature;
1341 signature.append(T_OBJECT); // receiver
1342 LIR_OprList* args = new LIR_OprList();
1343 args->append(receiver.result());
1344 CodeEmitInfo* info = state_for(x, x->state());
1345 call_runtime(&signature, args,
1346 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1347 voidType, info);
1348
1349 set_no_result(x);
1350 }
1351
1352
1353 //------------------------local access--------------------------------------
1354
1355 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1356 if (x->operand()->is_illegal()) {
1357 Constant* c = x->as_Constant();
1358 if (c != NULL) {
1359 x->set_operand(LIR_OprFact::value_type(c->type()));
1360 } else {
1361 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
1362 // allocate a virtual register for this local or phi
1363 x->set_operand(rlock(x));
1364 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
1365 }
1366 }
1367 return x->operand();
1368 }
1369
1370
1371 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
1372 if (opr->is_virtual()) {
1373 return instruction_for_vreg(opr->vreg_number());
1374 }
1375 return NULL;
1376 }
1377
1378
1379 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1380 if (reg_num < _instruction_for_operand.length()) {
1381 return _instruction_for_operand.at(reg_num);
1382 }
1383 return NULL;
1384 }
1385
1386
1387 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1388 if (_vreg_flags.size_in_bits() == 0) {
1389 BitMap2D temp(100, num_vreg_flags);
1390 _vreg_flags = temp;
1391 }
1392 _vreg_flags.at_put_grow(vreg_num, f, true);
1393 }
1394
1395 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1396 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1397 return false;
1398 }
1399 return _vreg_flags.at(vreg_num, f);
1400 }
1401
1402
1403 // Block local constant handling. This code is useful for keeping
1404 // unpinned constants and constants which aren't exposed in the IR in
1405 // registers. Unpinned Constant instructions have their operands
1406 // cleared when the block is finished so that other blocks can't end
1407 // up referring to their registers.
1408
1409 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1410 assert(!x->is_pinned(), "only for unpinned constants");
1411 _unpinned_constants.append(x);
1412 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1413 }
1414
1415
1416 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1417 BasicType t = c->type();
1418 for (int i = 0; i < _constants.length(); i++) {
1419 LIR_Const* other = _constants.at(i);
1420 if (t == other->type()) {
1421 switch (t) {
1422 case T_INT:
1423 case T_FLOAT:
1424 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1425 break;
1426 case T_LONG:
1427 case T_DOUBLE:
1428 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1429 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1430 break;
1431 case T_OBJECT:
1432 if (c->as_jobject() != other->as_jobject()) continue;
1433 break;
1434 default:
1435 break;
1436 }
1437 return _reg_for_constants.at(i);
1438 }
1439 }
1440
1441 LIR_Opr result = new_register(t);
1442 __ move((LIR_Opr)c, result);
1443 _constants.append(c);
1444 _reg_for_constants.append(result);
1445 return result;
1446 }
1447
1448 //------------------------field access--------------------------------------
1449
1450 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
1451 assert(x->number_of_arguments() == 4, "wrong type");
1452 LIRItem obj (x->argument_at(0), this); // object
1453 LIRItem offset(x->argument_at(1), this); // offset of field
1454 LIRItem cmp (x->argument_at(2), this); // value to compare with field
1455 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
1456 assert(obj.type()->tag() == objectTag, "invalid type");
1457
1458 // In 64bit the type can be long, sparc doesn't have this assert
1459 // assert(offset.type()->tag() == intTag, "invalid type");
1460
1461 assert(cmp.type()->tag() == type->tag(), "invalid type");
1462 assert(val.type()->tag() == type->tag(), "invalid type");
1463
1464 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type),
1465 obj, offset, cmp, val);
1466 set_result(x, result);
1467 }
1468
1469 // Comment copied form templateTable_i486.cpp
1470 // ----------------------------------------------------------------------------
1471 // Volatile variables demand their effects be made known to all CPU's in
1472 // order. Store buffers on most chips allow reads & writes to reorder; the
1473 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1474 // memory barrier (i.e., it's not sufficient that the interpreter does not
1475 // reorder volatile references, the hardware also must not reorder them).
1476 //
1477 // According to the new Java Memory Model (JMM):
1478 // (1) All volatiles are serialized wrt to each other.
1479 // ALSO reads & writes act as aquire & release, so:
1480 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1481 // the read float up to before the read. It's OK for non-volatile memory refs
1482 // that happen before the volatile read to float down below it.
1483 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1484 // that happen BEFORE the write float down to after the write. It's OK for
1485 // non-volatile memory refs that happen after the volatile write to float up
1486 // before it.
1487 //
1488 // We only put in barriers around volatile refs (they are expensive), not
1489 // _between_ memory refs (that would require us to track the flavor of the
1490 // previous memory refs). Requirements (2) and (3) require some barriers
1491 // before volatile stores and after volatile loads. These nearly cover
1492 // requirement (1) but miss the volatile-store-volatile-load case. This final
1493 // case is placed after volatile-stores although it could just as well go
1494 // before volatile-loads.
1495
1496
1497 void LIRGenerator::do_StoreField(StoreField* x) {
1498 bool needs_patching = x->needs_patching();
1499 bool is_volatile = x->field()->is_volatile();
1500 BasicType field_type = x->field_type();
1501
1502 CodeEmitInfo* info = NULL;
1503 if (needs_patching) {
1504 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1505 info = state_for(x, x->state_before());
1506 } else if (x->needs_null_check()) {
1507 NullCheck* nc = x->explicit_null_check();
1508 if (nc == NULL) {
1509 info = state_for(x);
1510 } else {
1511 info = state_for(nc);
1512 }
1513 }
1514
1515 LIRItem object(x->obj(), this);
1516 LIRItem value(x->value(), this);
1517
1518 object.load_item();
1519
1520 if (is_volatile || needs_patching) {
1521 // load item if field is volatile (fewer special cases for volatiles)
1522 // load item if field not initialized
1523 // load item if field not constant
1524 // because of code patching we cannot inline constants
1525 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1526 value.load_byte_item();
1527 } else {
1528 value.load_item();
1529 }
1530 } else {
1531 value.load_for_store(field_type);
1532 }
1533
1534 set_no_result(x);
1535
1536 #ifndef PRODUCT
1537 if (PrintNotLoaded && needs_patching) {
1538 tty->print_cr(" ###class not loaded at store_%s bci %d",
1539 x->is_static() ? "static" : "field", x->printable_bci());
1540 }
1541 #endif
1542
1543 if (x->needs_null_check() &&
1544 (needs_patching ||
1545 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1546 if (needs_patching && x->field()->signature()->starts_with("Q", 1)) {
1547 // We are storing a field of type "QT;", but T is not yet loaded, so we don't
1548 // know whether this field is flattened or not. Let's deoptimize and recompile.
1549 CodeStub* stub = new DeoptimizeStub(new CodeEmitInfo(info),
1550 Deoptimization::Reason_unloaded,
1551 Deoptimization::Action_make_not_entrant);
1552 __ branch(lir_cond_always, T_ILLEGAL, stub);
1553 } else {
1554 // Emit an explicit null check because the offset is too large.
1555 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1556 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1557 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1558 }
1559 }
1560
1561 DecoratorSet decorators = IN_HEAP;
1562 if (is_volatile) {
1563 decorators |= MO_SEQ_CST;
1564 }
1565 if (needs_patching) {
1566 decorators |= C1_NEEDS_PATCHING;
1567 }
1568
1569 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()),
1570 value.result(), info != NULL ? new CodeEmitInfo(info) : NULL, info);
1571 }
1572
1573 // FIXME -- I can't find any other way to pass an address to access_load_at().
1574 class TempResolvedAddress: public Instruction {
1575 public:
1576 TempResolvedAddress(ValueType* type, LIR_Opr addr) : Instruction(type) {
1577 set_operand(addr);
1578 }
1579 virtual void input_values_do(ValueVisitor*) {}
1580 virtual void visit(InstructionVisitor* v) {}
1581 virtual const char* name() const { return "TempResolvedAddress"; }
1582 };
1583
1584 void LIRGenerator::access_flattened_array(bool is_load, LIRItem& array, LIRItem& index, LIRItem& obj_item) {
1585 // Find the starting address of the source (inside the array)
1586 ciType* array_type = array.value()->declared_type();
1587 ciValueArrayKlass* value_array_klass = array_type->as_value_array_klass();
1588 assert(value_array_klass->is_loaded(), "must be");
1589
1590 ciValueKlass* elem_klass = value_array_klass->element_klass()->as_value_klass();
1591 int array_header_size = value_array_klass->array_header_in_bytes();
1592 int shift = value_array_klass->log2_element_size();
1593
1594 #ifndef _LP64
1595 LIR_Opr index_op = new_register(T_INT);
1596 // FIXME -- on 32-bit, the shift below can overflow, so we need to check that
1597 // the top (shift+1) bits of index_op must be zero, or
1598 // else throw ArrayIndexOutOfBoundsException
1599 if (index.result()->is_constant()) {
1600 jint const_index = index.result()->as_jint();
1601 __ move(LIR_OprFact::intConst(const_index << shift), index_op);
1602 } else {
1603 __ shift_left(index_op, shift, index.result());
1604 }
1605 #else
1606 LIR_Opr index_op = new_register(T_LONG);
1607 if (index.result()->is_constant()) {
1608 jint const_index = index.result()->as_jint();
1609 __ move(LIR_OprFact::longConst(const_index << shift), index_op);
1610 } else {
1611 __ convert(Bytecodes::_i2l, index.result(), index_op);
1612 // Need to shift manually, as LIR_Address can scale only up to 3.
1613 __ shift_left(index_op, shift, index_op);
1614 }
1615 #endif
1616
1617 LIR_Opr elm_op = new_pointer_register();
1618 LIR_Address* elm_address = new LIR_Address(array.result(), index_op, array_header_size, T_ADDRESS);
1619 __ leal(LIR_OprFact::address(elm_address), elm_op);
1620
1621 for (int i = 0; i < elem_klass->nof_nonstatic_fields(); i++) {
1622 ciField* inner_field = elem_klass->nonstatic_field_at(i);
1623 assert(!inner_field->is_flattened(), "flattened fields must have been expanded");
1624 int obj_offset = inner_field->offset();
1625 int elm_offset = obj_offset - elem_klass->first_field_offset(); // object header is not stored in array.
1626
1627 BasicType field_type = inner_field->type()->basic_type();
1628 switch (field_type) {
1629 case T_BYTE:
1630 case T_BOOLEAN:
1631 case T_SHORT:
1632 case T_CHAR:
1633 field_type = T_INT;
1634 break;
1635 default:
1636 break;
1637 }
1638
1639 LIR_Opr temp = new_register(field_type);
1640 TempResolvedAddress* elm_resolved_addr = new TempResolvedAddress(as_ValueType(field_type), elm_op);
1641 LIRItem elm_item(elm_resolved_addr, this);
1642
1643 DecoratorSet decorators = IN_HEAP;
1644 if (is_load) {
1645 access_load_at(decorators, field_type,
1646 elm_item, LIR_OprFact::intConst(elm_offset), temp,
1647 NULL, NULL);
1648 access_store_at(decorators, field_type,
1649 obj_item, LIR_OprFact::intConst(obj_offset), temp,
1650 NULL, NULL);
1651 } else {
1652 access_load_at(decorators, field_type,
1653 obj_item, LIR_OprFact::intConst(obj_offset), temp,
1654 NULL, NULL);
1655 access_store_at(decorators, field_type,
1656 elm_item, LIR_OprFact::intConst(elm_offset), temp,
1657 NULL, NULL);
1658 }
1659 }
1660 }
1661
1662 void LIRGenerator::check_flattened_array(LIRItem& array, CodeStub* slow_path) {
1663 LIR_Opr array_klass_reg = new_register(T_METADATA);
1664
1665 __ move(new LIR_Address(array.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), array_klass_reg);
1666 LIR_Opr layout = new_register(T_INT);
1667 __ move(new LIR_Address(array_klass_reg, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
1668 __ shift_right(layout, Klass::_lh_array_tag_shift, layout);
1669 __ cmp(lir_cond_equal, layout, LIR_OprFact::intConst(Klass::_lh_array_tag_vt_value));
1670 __ branch(lir_cond_equal, T_ILLEGAL, slow_path);
1671 }
1672
1673 bool LIRGenerator::needs_flattened_array_store_check(StoreIndexed* x) {
1674 if (ValueArrayFlatten && x->elt_type() == T_OBJECT && x->array()->maybe_flattened_array()) {
1675 ciType* type = x->value()->declared_type();
1676 if (type != NULL && type->is_klass()) {
1677 ciKlass* klass = type->as_klass();
1678 if (klass->is_loaded() &&
1679 !(klass->is_valuetype() && klass->as_value_klass()->flatten_array()) &&
1680 !klass->is_java_lang_Object() &&
1681 !klass->is_interface()) {
1682 // This is known to be a non-flattenable object. If the array is flattened,
1683 // it will be caught by the code generated by array_store_check().
1684 return false;
1685 }
1686 }
1687 // We're not 100% sure, so let's do the flattened_array_store_check.
1688 return true;
1689 }
1690 return false;
1691 }
1692
1693 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
1694 assert(x->is_pinned(),"");
1695 assert(x->elt_type() != T_ARRAY, "never used");
1696 bool is_loaded_flattened_array = x->array()->is_loaded_flattened_array();
1697 bool needs_range_check = x->compute_needs_range_check();
1698 bool use_length = x->length() != NULL;
1699 bool obj_store = x->elt_type() == T_OBJECT;
1700 bool needs_store_check = obj_store && !is_loaded_flattened_array &&
1701 (x->value()->as_Constant() == NULL ||
1702 !get_jobject_constant(x->value())->is_null_object() ||
1703 x->should_profile());
1704
1705 LIRItem array(x->array(), this);
1706 LIRItem index(x->index(), this);
1707 LIRItem value(x->value(), this);
1708 LIRItem length(this);
1709
1710 array.load_item();
1711 index.load_nonconstant();
1712
1713 if (use_length && needs_range_check) {
1714 length.set_instruction(x->length());
1715 length.load_item();
1716 }
1717
1718 if (needs_store_check || x->check_boolean()
1719 || is_loaded_flattened_array || needs_flattened_array_store_check(x)) {
1720 value.load_item();
1721 } else {
1722 value.load_for_store(x->elt_type());
1723 }
1724
1725 set_no_result(x);
1726
1727 // the CodeEmitInfo must be duplicated for each different
1728 // LIR-instruction because spilling can occur anywhere between two
1729 // instructions and so the debug information must be different
1730 CodeEmitInfo* range_check_info = state_for(x);
1731 CodeEmitInfo* null_check_info = NULL;
1732 if (x->needs_null_check()) {
1733 null_check_info = new CodeEmitInfo(range_check_info);
1734 }
1735
1736 if (GenerateRangeChecks && needs_range_check) {
1737 if (use_length) {
1738 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1739 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result()));
1740 } else {
1741 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1742 // range_check also does the null check
1743 null_check_info = NULL;
1744 }
1745 }
1746
1747 if (GenerateArrayStoreCheck && needs_store_check) {
1748 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
1749 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci());
1750 }
1751
1752 if (is_loaded_flattened_array) {
1753 if (!x->is_exact_flattened_array_store()) {
1754 CodeEmitInfo* info = new CodeEmitInfo(range_check_info);
1755 ciKlass* element_klass = x->array()->declared_type()->as_value_array_klass()->element_klass();
1756 flattened_array_store_check(value.result(), element_klass, info);
1757 } else if (!x->value()->is_never_null()) {
1758 __ null_check(value.result(), new CodeEmitInfo(range_check_info));
1759 }
1760 access_flattened_array(false, array, index, value);
1761 } else {
1762 StoreFlattenedArrayStub* slow_path = NULL;
1763
1764 if (needs_flattened_array_store_check(x)) {
1765 // Check if we indeed have a flattened array
1766 index.load_item();
1767 slow_path = new StoreFlattenedArrayStub(array.result(), index.result(), value.result(), state_for(x));
1768 check_flattened_array(array, slow_path);
1769 }
1770
1771 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1772 if (x->check_boolean()) {
1773 decorators |= C1_MASK_BOOLEAN;
1774 }
1775
1776 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(),
1777 NULL, null_check_info);
1778 if (slow_path != NULL) {
1779 __ branch_destination(slow_path->continuation());
1780 }
1781 }
1782 }
1783
1784 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type,
1785 LIRItem& base, LIR_Opr offset, LIR_Opr result,
1786 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) {
1787 decorators |= ACCESS_READ;
1788 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info);
1789 if (access.is_raw()) {
1790 _barrier_set->BarrierSetC1::load_at(access, result);
1791 } else {
1792 _barrier_set->load_at(access, result);
1793 }
1794 }
1795
1796 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type,
1797 LIR_Opr addr, LIR_Opr result) {
1798 decorators |= ACCESS_READ;
1799 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type);
1800 access.set_resolved_addr(addr);
1801 if (access.is_raw()) {
1802 _barrier_set->BarrierSetC1::load(access, result);
1803 } else {
1804 _barrier_set->load(access, result);
1805 }
1806 }
1807
1808 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type,
1809 LIRItem& base, LIR_Opr offset, LIR_Opr value,
1810 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
1811 decorators |= ACCESS_WRITE;
1812 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info);
1813 if (access.is_raw()) {
1814 _barrier_set->BarrierSetC1::store_at(access, value);
1815 } else {
1816 _barrier_set->store_at(access, value);
1817 }
1818 }
1819
1820 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type,
1821 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
1822 decorators |= ACCESS_READ;
1823 decorators |= ACCESS_WRITE;
1824 // Atomic operations are SEQ_CST by default
1825 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1826 LIRAccess access(this, decorators, base, offset, type);
1827 if (access.is_raw()) {
1828 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value);
1829 } else {
1830 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value);
1831 }
1832 }
1833
1834 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type,
1835 LIRItem& base, LIRItem& offset, LIRItem& value) {
1836 decorators |= ACCESS_READ;
1837 decorators |= ACCESS_WRITE;
1838 // Atomic operations are SEQ_CST by default
1839 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1840 LIRAccess access(this, decorators, base, offset, type);
1841 if (access.is_raw()) {
1842 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value);
1843 } else {
1844 return _barrier_set->atomic_xchg_at(access, value);
1845 }
1846 }
1847
1848 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type,
1849 LIRItem& base, LIRItem& offset, LIRItem& value) {
1850 decorators |= ACCESS_READ;
1851 decorators |= ACCESS_WRITE;
1852 // Atomic operations are SEQ_CST by default
1853 decorators |= ((decorators & MO_DECORATOR_MASK) != 0) ? MO_SEQ_CST : 0;
1854 LIRAccess access(this, decorators, base, offset, type);
1855 if (access.is_raw()) {
1856 return _barrier_set->BarrierSetC1::atomic_add_at(access, value);
1857 } else {
1858 return _barrier_set->atomic_add_at(access, value);
1859 }
1860 }
1861
1862 LIR_Opr LIRGenerator::access_resolve(DecoratorSet decorators, LIR_Opr obj) {
1863 // Use stronger ACCESS_WRITE|ACCESS_READ by default.
1864 if ((decorators & (ACCESS_READ | ACCESS_WRITE)) == 0) {
1865 decorators |= ACCESS_READ | ACCESS_WRITE;
1866 }
1867
1868 return _barrier_set->resolve(this, decorators, obj);
1869 }
1870
1871 void LIRGenerator::do_LoadField(LoadField* x) {
1872 bool needs_patching = x->needs_patching();
1873 bool is_volatile = x->field()->is_volatile();
1874 BasicType field_type = x->field_type();
1875
1876 CodeEmitInfo* info = NULL;
1877 if (needs_patching) {
1878 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1879 info = state_for(x, x->state_before());
1880 } else if (x->needs_null_check()) {
1881 NullCheck* nc = x->explicit_null_check();
1882 if (nc == NULL) {
1883 info = state_for(x);
1884 } else {
1885 info = state_for(nc);
1886 }
1887 }
1888
1889 LIRItem object(x->obj(), this);
1890
1891 object.load_item();
1892
1893 #ifndef PRODUCT
1894 if (PrintNotLoaded && needs_patching) {
1895 tty->print_cr(" ###class not loaded at load_%s bci %d",
1896 x->is_static() ? "static" : "field", x->printable_bci());
1897 }
1898 #endif
1899
1900 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1901 if (x->needs_null_check() &&
1902 (needs_patching ||
1903 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1904 stress_deopt)) {
1905 if (needs_patching && x->field()->signature()->starts_with("Q", 1)) {
1906 // We are loading a field of type "QT;", but class T is not yet loaded. We don't know
1907 // whether this field is flattened or not. Let's deoptimize and recompile.
1908 CodeStub* stub = new DeoptimizeStub(new CodeEmitInfo(info),
1909 Deoptimization::Reason_unloaded,
1910 Deoptimization::Action_make_not_entrant);
1911 __ branch(lir_cond_always, T_ILLEGAL, stub);
1912 } else {
1913 LIR_Opr obj = object.result();
1914 if (stress_deopt) {
1915 obj = new_register(T_OBJECT);
1916 __ move(LIR_OprFact::oopConst(NULL), obj);
1917 }
1918 // Emit an explicit null check because the offset is too large.
1919 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1920 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1921 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1922 }
1923 } else if (x->value_klass() != NULL && x->default_value() == NULL) {
1924 assert(x->is_static() && !x->value_klass()->is_loaded(), "must be");
1925 assert(needs_patching, "must be");
1926 // The value klass was not loaded so we don't know what its default value should be
1927 CodeStub* stub = new DeoptimizeStub(new CodeEmitInfo(info),
1928 Deoptimization::Reason_unloaded,
1929 Deoptimization::Action_make_not_entrant);
1930 __ branch(lir_cond_always, T_ILLEGAL, stub);
1931 }
1932
1933 DecoratorSet decorators = IN_HEAP;
1934 if (is_volatile) {
1935 decorators |= MO_SEQ_CST;
1936 }
1937 if (needs_patching) {
1938 decorators |= C1_NEEDS_PATCHING;
1939 }
1940
1941 LIR_Opr result = rlock_result(x, field_type);
1942 access_load_at(decorators, field_type,
1943 object, LIR_OprFact::intConst(x->offset()), result,
1944 info ? new CodeEmitInfo(info) : NULL, info);
1945
1946 if (x->value_klass() != NULL && x->default_value() != NULL) {
1947 LabelObj* L_end = new LabelObj();
1948 __ cmp(lir_cond_notEqual, result, LIR_OprFact::oopConst(NULL));
1949 __ branch(lir_cond_notEqual, T_OBJECT, L_end->label());
1950
1951 LIRItem default_value(x->default_value(), this);
1952 default_value.load_item();
1953 __ move(default_value.result(), result);
1954
1955 __ branch_destination(L_end->label());
1956 }
1957 }
1958
1959
1960 //------------------------java.nio.Buffer.checkIndex------------------------
1961
1962 // int java.nio.Buffer.checkIndex(int)
1963 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
1964 // NOTE: by the time we are in checkIndex() we are guaranteed that
1965 // the buffer is non-null (because checkIndex is package-private and
1966 // only called from within other methods in the buffer).
1967 assert(x->number_of_arguments() == 2, "wrong type");
1968 LIRItem buf (x->argument_at(0), this);
1969 LIRItem index(x->argument_at(1), this);
1970 buf.load_item();
1971 index.load_item();
1972
1973 LIR_Opr result = rlock_result(x);
1974 if (GenerateRangeChecks) {
1975 CodeEmitInfo* info = state_for(x);
1976 CodeStub* stub = new RangeCheckStub(info, index.result());
1977 LIR_Opr buf_obj = access_resolve(IS_NOT_NULL | ACCESS_READ, buf.result());
1978 if (index.result()->is_constant()) {
1979 cmp_mem_int(lir_cond_belowEqual, buf_obj, java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
1980 __ branch(lir_cond_belowEqual, T_INT, stub);
1981 } else {
1982 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf_obj,
1983 java_nio_Buffer::limit_offset(), T_INT, info);
1984 __ branch(lir_cond_aboveEqual, T_INT, stub);
1985 }
1986 __ move(index.result(), result);
1987 } else {
1988 // Just load the index into the result register
1989 __ move(index.result(), result);
1990 }
1991 }
1992
1993
1994 //------------------------array access--------------------------------------
1995
1996
1997 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1998 LIRItem array(x->array(), this);
1999 array.load_item();
2000 LIR_Opr reg = rlock_result(x);
2001
2002 CodeEmitInfo* info = NULL;
2003 if (x->needs_null_check()) {
2004 NullCheck* nc = x->explicit_null_check();
2005 if (nc == NULL) {
2006 info = state_for(x);
2007 } else {
2008 info = state_for(nc);
2009 }
2010 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
2011 LIR_Opr obj = new_register(T_OBJECT);
2012 __ move(LIR_OprFact::oopConst(NULL), obj);
2013 __ null_check(obj, new CodeEmitInfo(info));
2014 }
2015 }
2016 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
2017 }
2018
2019
2020 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
2021 bool use_length = x->length() != NULL;
2022 LIRItem array(x->array(), this);
2023 LIRItem index(x->index(), this);
2024 LIRItem length(this);
2025 bool needs_range_check = x->compute_needs_range_check();
2026
2027 if (use_length && needs_range_check) {
2028 length.set_instruction(x->length());
2029 length.load_item();
2030 }
2031
2032 array.load_item();
2033 if (index.is_constant() && can_inline_as_constant(x->index())) {
2034 // let it be a constant
2035 index.dont_load_item();
2036 } else {
2037 index.load_item();
2038 }
2039
2040 CodeEmitInfo* range_check_info = state_for(x);
2041 CodeEmitInfo* null_check_info = NULL;
2042 if (x->needs_null_check()) {
2043 NullCheck* nc = x->explicit_null_check();
2044 if (nc != NULL) {
2045 null_check_info = state_for(nc);
2046 } else {
2047 null_check_info = range_check_info;
2048 }
2049 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
2050 LIR_Opr obj = new_register(T_OBJECT);
2051 __ move(LIR_OprFact::oopConst(NULL), obj);
2052 __ null_check(obj, new CodeEmitInfo(null_check_info));
2053 }
2054 }
2055
2056 if (GenerateRangeChecks && needs_range_check) {
2057 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
2058 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result(), array.result()));
2059 } else if (use_length) {
2060 // TODO: use a (modified) version of array_range_check that does not require a
2061 // constant length to be loaded to a register
2062 __ cmp(lir_cond_belowEqual, length.result(), index.result());
2063 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result(), array.result()));
2064 } else {
2065 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
2066 // The range check performs the null check, so clear it out for the load
2067 null_check_info = NULL;
2068 }
2069 }
2070
2071 if (x->array()->is_loaded_flattened_array()) {
2072 // Find the destination address (of the NewValueTypeInstance)
2073 LIR_Opr obj = x->vt()->operand();
2074 LIRItem obj_item(x->vt(), this);
2075
2076 access_flattened_array(true, array, index, obj_item);
2077 set_no_result(x);
2078 } else {
2079 LIR_Opr result = rlock_result(x, x->elt_type());
2080 LoadFlattenedArrayStub* slow_path = NULL;
2081
2082 if (x->elt_type() == T_OBJECT && x->array()->maybe_flattened_array()) {
2083 index.load_item();
2084 // if we are loading from flattened array, load it using a runtime call
2085 slow_path = new LoadFlattenedArrayStub(array.result(), index.result(), result, state_for(x));
2086 check_flattened_array(array, slow_path);
2087 }
2088
2089 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
2090 access_load_at(decorators, x->elt_type(),
2091 array, index.result(), result,
2092 NULL, null_check_info);
2093
2094 if (slow_path != NULL) {
2095 __ branch_destination(slow_path->continuation());
2096 }
2097 }
2098 }
2099
2100
2101 void LIRGenerator::do_NullCheck(NullCheck* x) {
2102 if (x->can_trap()) {
2103 LIRItem value(x->obj(), this);
2104 value.load_item();
2105 CodeEmitInfo* info = state_for(x);
2106 __ null_check(value.result(), info);
2107 }
2108 }
2109
2110
2111 void LIRGenerator::do_TypeCast(TypeCast* x) {
2112 LIRItem value(x->obj(), this);
2113 value.load_item();
2114 // the result is the same as from the node we are casting
2115 set_result(x, value.result());
2116 }
2117
2118
2119 void LIRGenerator::do_Throw(Throw* x) {
2120 LIRItem exception(x->exception(), this);
2121 exception.load_item();
2122 set_no_result(x);
2123 LIR_Opr exception_opr = exception.result();
2124 CodeEmitInfo* info = state_for(x, x->state());
2125
2126 #ifndef PRODUCT
2127 if (PrintC1Statistics) {
2128 increment_counter(Runtime1::throw_count_address(), T_INT);
2129 }
2130 #endif
2131
2132 // check if the instruction has an xhandler in any of the nested scopes
2133 bool unwind = false;
2134 if (info->exception_handlers()->length() == 0) {
2135 // this throw is not inside an xhandler
2136 unwind = true;
2137 } else {
2138 // get some idea of the throw type
2139 bool type_is_exact = true;
2140 ciType* throw_type = x->exception()->exact_type();
2141 if (throw_type == NULL) {
2142 type_is_exact = false;
2143 throw_type = x->exception()->declared_type();
2144 }
2145 if (throw_type != NULL && throw_type->is_instance_klass()) {
2146 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
2147 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
2148 }
2149 }
2150
2151 // do null check before moving exception oop into fixed register
2152 // to avoid a fixed interval with an oop during the null check.
2153 // Use a copy of the CodeEmitInfo because debug information is
2154 // different for null_check and throw.
2155 if (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL) {
2156 // if the exception object wasn't created using new then it might be null.
2157 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
2158 }
2159
2160 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2161 // we need to go through the exception lookup path to get JVMTI
2162 // notification done
2163 unwind = false;
2164 }
2165
2166 // move exception oop into fixed register
2167 __ move(exception_opr, exceptionOopOpr());
2168
2169 if (unwind) {
2170 __ unwind_exception(exceptionOopOpr());
2171 } else {
2172 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2173 }
2174 }
2175
2176
2177 void LIRGenerator::do_RoundFP(RoundFP* x) {
2178 LIRItem input(x->input(), this);
2179 input.load_item();
2180 LIR_Opr input_opr = input.result();
2181 assert(input_opr->is_register(), "why round if value is not in a register?");
2182 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2183 if (input_opr->is_single_fpu()) {
2184 set_result(x, round_item(input_opr)); // This code path not currently taken
2185 } else {
2186 LIR_Opr result = new_register(T_DOUBLE);
2187 set_vreg_flag(result, must_start_in_memory);
2188 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2189 set_result(x, result);
2190 }
2191 }
2192
2193 // Here UnsafeGetRaw may have x->base() and x->index() be int or long
2194 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit.
2195 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
2196 LIRItem base(x->base(), this);
2197 LIRItem idx(this);
2198
2199 base.load_item();
2200 if (x->has_index()) {
2201 idx.set_instruction(x->index());
2202 idx.load_nonconstant();
2203 }
2204
2205 LIR_Opr reg = rlock_result(x, x->basic_type());
2206
2207 int log2_scale = 0;
2208 if (x->has_index()) {
2209 log2_scale = x->log2_scale();
2210 }
2211
2212 assert(!x->has_index() || idx.value() == x->index(), "should match");
2213
2214 LIR_Opr base_op = base.result();
2215 LIR_Opr index_op = idx.result();
2216 #ifndef _LP64
2217 if (base_op->type() == T_LONG) {
2218 base_op = new_register(T_INT);
2219 __ convert(Bytecodes::_l2i, base.result(), base_op);
2220 }
2221 if (x->has_index()) {
2222 if (index_op->type() == T_LONG) {
2223 LIR_Opr long_index_op = index_op;
2224 if (index_op->is_constant()) {
2225 long_index_op = new_register(T_LONG);
2226 __ move(index_op, long_index_op);
2227 }
2228 index_op = new_register(T_INT);
2229 __ convert(Bytecodes::_l2i, long_index_op, index_op);
2230 } else {
2231 assert(x->index()->type()->tag() == intTag, "must be");
2232 }
2233 }
2234 // At this point base and index should be all ints.
2235 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2236 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int");
2237 #else
2238 if (x->has_index()) {
2239 if (index_op->type() == T_INT) {
2240 if (!index_op->is_constant()) {
2241 index_op = new_register(T_LONG);
2242 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2243 }
2244 } else {
2245 assert(index_op->type() == T_LONG, "must be");
2246 if (index_op->is_constant()) {
2247 index_op = new_register(T_LONG);
2248 __ move(idx.result(), index_op);
2249 }
2250 }
2251 }
2252 // At this point base is a long non-constant
2253 // Index is a long register or a int constant.
2254 // We allow the constant to stay an int because that would allow us a more compact encoding by
2255 // embedding an immediate offset in the address expression. If we have a long constant, we have to
2256 // move it into a register first.
2257 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant");
2258 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) ||
2259 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type");
2260 #endif
2261
2262 BasicType dst_type = x->basic_type();
2263
2264 LIR_Address* addr;
2265 if (index_op->is_constant()) {
2266 assert(log2_scale == 0, "must not have a scale");
2267 assert(index_op->type() == T_INT, "only int constants supported");
2268 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
2269 } else {
2270 #ifdef X86
2271 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
2272 #elif defined(GENERATE_ADDRESS_IS_PREFERRED)
2273 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type);
2274 #else
2275 if (index_op->is_illegal() || log2_scale == 0) {
2276 addr = new LIR_Address(base_op, index_op, dst_type);
2277 } else {
2278 LIR_Opr tmp = new_pointer_register();
2279 __ shift_left(index_op, log2_scale, tmp);
2280 addr = new LIR_Address(base_op, tmp, dst_type);
2281 }
2282 #endif
2283 }
2284
2285 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
2286 __ unaligned_move(addr, reg);
2287 } else {
2288 if (dst_type == T_OBJECT && x->is_wide()) {
2289 __ move_wide(addr, reg);
2290 } else {
2291 __ move(addr, reg);
2292 }
2293 }
2294 }
2295
2296
2297 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
2298 int log2_scale = 0;
2299 BasicType type = x->basic_type();
2300
2301 if (x->has_index()) {
2302 log2_scale = x->log2_scale();
2303 }
2304
2305 LIRItem base(x->base(), this);
2306 LIRItem value(x->value(), this);
2307 LIRItem idx(this);
2308
2309 base.load_item();
2310 if (x->has_index()) {
2311 idx.set_instruction(x->index());
2312 idx.load_item();
2313 }
2314
2315 if (type == T_BYTE || type == T_BOOLEAN) {
2316 value.load_byte_item();
2317 } else {
2318 value.load_item();
2319 }
2320
2321 set_no_result(x);
2322
2323 LIR_Opr base_op = base.result();
2324 LIR_Opr index_op = idx.result();
2325
2326 #ifdef GENERATE_ADDRESS_IS_PREFERRED
2327 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type());
2328 #else
2329 #ifndef _LP64
2330 if (base_op->type() == T_LONG) {
2331 base_op = new_register(T_INT);
2332 __ convert(Bytecodes::_l2i, base.result(), base_op);
2333 }
2334 if (x->has_index()) {
2335 if (index_op->type() == T_LONG) {
2336 index_op = new_register(T_INT);
2337 __ convert(Bytecodes::_l2i, idx.result(), index_op);
2338 }
2339 }
2340 // At this point base and index should be all ints and not constants
2341 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2342 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int");
2343 #else
2344 if (x->has_index()) {
2345 if (index_op->type() == T_INT) {
2346 index_op = new_register(T_LONG);
2347 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2348 }
2349 }
2350 // At this point base and index are long and non-constant
2351 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long");
2352 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long");
2353 #endif
2354
2355 if (log2_scale != 0) {
2356 // temporary fix (platform dependent code without shift on Intel would be better)
2357 // TODO: ARM also allows embedded shift in the address
2358 LIR_Opr tmp = new_pointer_register();
2359 if (TwoOperandLIRForm) {
2360 __ move(index_op, tmp);
2361 index_op = tmp;
2362 }
2363 __ shift_left(index_op, log2_scale, tmp);
2364 if (!TwoOperandLIRForm) {
2365 index_op = tmp;
2366 }
2367 }
2368
2369 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
2370 #endif // !GENERATE_ADDRESS_IS_PREFERRED
2371 __ move(value.result(), addr);
2372 }
2373
2374
2375 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
2376 BasicType type = x->basic_type();
2377 LIRItem src(x->object(), this);
2378 LIRItem off(x->offset(), this);
2379
2380 off.load_item();
2381 src.load_item();
2382
2383 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2384
2385 if (x->is_volatile()) {
2386 decorators |= MO_SEQ_CST;
2387 }
2388 if (type == T_BOOLEAN) {
2389 decorators |= C1_MASK_BOOLEAN;
2390 }
2391 if (type == T_ARRAY || type == T_OBJECT) {
2392 decorators |= ON_UNKNOWN_OOP_REF;
2393 }
2394
2395 LIR_Opr result = rlock_result(x, type);
2396 access_load_at(decorators, type,
2397 src, off.result(), result);
2398 }
2399
2400
2401 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
2402 BasicType type = x->basic_type();
2403 LIRItem src(x->object(), this);
2404 LIRItem off(x->offset(), this);
2405 LIRItem data(x->value(), this);
2406
2407 src.load_item();
2408 if (type == T_BOOLEAN || type == T_BYTE) {
2409 data.load_byte_item();
2410 } else {
2411 data.load_item();
2412 }
2413 off.load_item();
2414
2415 set_no_result(x);
2416
2417 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2418 if (type == T_ARRAY || type == T_OBJECT) {
2419 decorators |= ON_UNKNOWN_OOP_REF;
2420 }
2421 if (x->is_volatile()) {
2422 decorators |= MO_SEQ_CST;
2423 }
2424 access_store_at(decorators, type, src, off.result(), data.result());
2425 }
2426
2427 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
2428 BasicType type = x->basic_type();
2429 LIRItem src(x->object(), this);
2430 LIRItem off(x->offset(), this);
2431 LIRItem value(x->value(), this);
2432
2433 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS | MO_SEQ_CST;
2434
2435 if (type == T_ARRAY || type == T_OBJECT) {
2436 decorators |= ON_UNKNOWN_OOP_REF;
2437 }
2438
2439 LIR_Opr result;
2440 if (x->is_add()) {
2441 result = access_atomic_add_at(decorators, type, src, off, value);
2442 } else {
2443 result = access_atomic_xchg_at(decorators, type, src, off, value);
2444 }
2445 set_result(x, result);
2446 }
2447
2448 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2449 int lng = x->length();
2450
2451 for (int i = 0; i < lng; i++) {
2452 SwitchRange* one_range = x->at(i);
2453 int low_key = one_range->low_key();
2454 int high_key = one_range->high_key();
2455 BlockBegin* dest = one_range->sux();
2456 if (low_key == high_key) {
2457 __ cmp(lir_cond_equal, value, low_key);
2458 __ branch(lir_cond_equal, T_INT, dest);
2459 } else if (high_key - low_key == 1) {
2460 __ cmp(lir_cond_equal, value, low_key);
2461 __ branch(lir_cond_equal, T_INT, dest);
2462 __ cmp(lir_cond_equal, value, high_key);
2463 __ branch(lir_cond_equal, T_INT, dest);
2464 } else {
2465 LabelObj* L = new LabelObj();
2466 __ cmp(lir_cond_less, value, low_key);
2467 __ branch(lir_cond_less, T_INT, L->label());
2468 __ cmp(lir_cond_lessEqual, value, high_key);
2469 __ branch(lir_cond_lessEqual, T_INT, dest);
2470 __ branch_destination(L->label());
2471 }
2472 }
2473 __ jump(default_sux);
2474 }
2475
2476
2477 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2478 SwitchRangeList* res = new SwitchRangeList();
2479 int len = x->length();
2480 if (len > 0) {
2481 BlockBegin* sux = x->sux_at(0);
2482 int key = x->lo_key();
2483 BlockBegin* default_sux = x->default_sux();
2484 SwitchRange* range = new SwitchRange(key, sux);
2485 for (int i = 0; i < len; i++, key++) {
2486 BlockBegin* new_sux = x->sux_at(i);
2487 if (sux == new_sux) {
2488 // still in same range
2489 range->set_high_key(key);
2490 } else {
2491 // skip tests which explicitly dispatch to the default
2492 if (sux != default_sux) {
2493 res->append(range);
2494 }
2495 range = new SwitchRange(key, new_sux);
2496 }
2497 sux = new_sux;
2498 }
2499 if (res->length() == 0 || res->last() != range) res->append(range);
2500 }
2501 return res;
2502 }
2503
2504
2505 // we expect the keys to be sorted by increasing value
2506 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2507 SwitchRangeList* res = new SwitchRangeList();
2508 int len = x->length();
2509 if (len > 0) {
2510 BlockBegin* default_sux = x->default_sux();
2511 int key = x->key_at(0);
2512 BlockBegin* sux = x->sux_at(0);
2513 SwitchRange* range = new SwitchRange(key, sux);
2514 for (int i = 1; i < len; i++) {
2515 int new_key = x->key_at(i);
2516 BlockBegin* new_sux = x->sux_at(i);
2517 if (key+1 == new_key && sux == new_sux) {
2518 // still in same range
2519 range->set_high_key(new_key);
2520 } else {
2521 // skip tests which explicitly dispatch to the default
2522 if (range->sux() != default_sux) {
2523 res->append(range);
2524 }
2525 range = new SwitchRange(new_key, new_sux);
2526 }
2527 key = new_key;
2528 sux = new_sux;
2529 }
2530 if (res->length() == 0 || res->last() != range) res->append(range);
2531 }
2532 return res;
2533 }
2534
2535
2536 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2537 LIRItem tag(x->tag(), this);
2538 tag.load_item();
2539 set_no_result(x);
2540
2541 if (x->is_safepoint()) {
2542 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2543 }
2544
2545 // move values into phi locations
2546 move_to_phi(x->state());
2547
2548 int lo_key = x->lo_key();
2549 int len = x->length();
2550 assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
2551 LIR_Opr value = tag.result();
2552
2553 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2554 ciMethod* method = x->state()->scope()->method();
2555 ciMethodData* md = method->method_data_or_null();
2556 assert(md != NULL, "Sanity");
2557 ciProfileData* data = md->bci_to_data(x->state()->bci());
2558 assert(data != NULL, "must have profiling data");
2559 assert(data->is_MultiBranchData(), "bad profile data?");
2560 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2561 LIR_Opr md_reg = new_register(T_METADATA);
2562 __ metadata2reg(md->constant_encoding(), md_reg);
2563 LIR_Opr data_offset_reg = new_pointer_register();
2564 LIR_Opr tmp_reg = new_pointer_register();
2565
2566 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2567 for (int i = 0; i < len; i++) {
2568 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2569 __ cmp(lir_cond_equal, value, i + lo_key);
2570 __ move(data_offset_reg, tmp_reg);
2571 __ cmove(lir_cond_equal,
2572 LIR_OprFact::intptrConst(count_offset),
2573 tmp_reg,
2574 data_offset_reg, T_INT);
2575 }
2576
2577 LIR_Opr data_reg = new_pointer_register();
2578 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2579 __ move(data_addr, data_reg);
2580 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2581 __ move(data_reg, data_addr);
2582 }
2583
2584 if (UseTableRanges) {
2585 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2586 } else {
2587 for (int i = 0; i < len; i++) {
2588 __ cmp(lir_cond_equal, value, i + lo_key);
2589 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2590 }
2591 __ jump(x->default_sux());
2592 }
2593 }
2594
2595
2596 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2597 LIRItem tag(x->tag(), this);
2598 tag.load_item();
2599 set_no_result(x);
2600
2601 if (x->is_safepoint()) {
2602 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2603 }
2604
2605 // move values into phi locations
2606 move_to_phi(x->state());
2607
2608 LIR_Opr value = tag.result();
2609 int len = x->length();
2610
2611 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2612 ciMethod* method = x->state()->scope()->method();
2613 ciMethodData* md = method->method_data_or_null();
2614 assert(md != NULL, "Sanity");
2615 ciProfileData* data = md->bci_to_data(x->state()->bci());
2616 assert(data != NULL, "must have profiling data");
2617 assert(data->is_MultiBranchData(), "bad profile data?");
2618 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2619 LIR_Opr md_reg = new_register(T_METADATA);
2620 __ metadata2reg(md->constant_encoding(), md_reg);
2621 LIR_Opr data_offset_reg = new_pointer_register();
2622 LIR_Opr tmp_reg = new_pointer_register();
2623
2624 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2625 for (int i = 0; i < len; i++) {
2626 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2627 __ cmp(lir_cond_equal, value, x->key_at(i));
2628 __ move(data_offset_reg, tmp_reg);
2629 __ cmove(lir_cond_equal,
2630 LIR_OprFact::intptrConst(count_offset),
2631 tmp_reg,
2632 data_offset_reg, T_INT);
2633 }
2634
2635 LIR_Opr data_reg = new_pointer_register();
2636 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2637 __ move(data_addr, data_reg);
2638 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2639 __ move(data_reg, data_addr);
2640 }
2641
2642 if (UseTableRanges) {
2643 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2644 } else {
2645 int len = x->length();
2646 for (int i = 0; i < len; i++) {
2647 __ cmp(lir_cond_equal, value, x->key_at(i));
2648 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
2649 }
2650 __ jump(x->default_sux());
2651 }
2652 }
2653
2654
2655 void LIRGenerator::do_Goto(Goto* x) {
2656 set_no_result(x);
2657
2658 if (block()->next()->as_OsrEntry()) {
2659 // need to free up storage used for OSR entry point
2660 LIR_Opr osrBuffer = block()->next()->operand();
2661 BasicTypeList signature;
2662 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2663 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2664 __ move(osrBuffer, cc->args()->at(0));
2665 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2666 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2667 }
2668
2669 if (x->is_safepoint()) {
2670 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2671
2672 // increment backedge counter if needed
2673 CodeEmitInfo* info = state_for(x, state);
2674 increment_backedge_counter(info, x->profiled_bci());
2675 CodeEmitInfo* safepoint_info = state_for(x, state);
2676 __ safepoint(safepoint_poll_register(), safepoint_info);
2677 }
2678
2679 // Gotos can be folded Ifs, handle this case.
2680 if (x->should_profile()) {
2681 ciMethod* method = x->profiled_method();
2682 assert(method != NULL, "method should be set if branch is profiled");
2683 ciMethodData* md = method->method_data_or_null();
2684 assert(md != NULL, "Sanity");
2685 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2686 assert(data != NULL, "must have profiling data");
2687 int offset;
2688 if (x->direction() == Goto::taken) {
2689 assert(data->is_BranchData(), "need BranchData for two-way branches");
2690 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2691 } else if (x->direction() == Goto::not_taken) {
2692 assert(data->is_BranchData(), "need BranchData for two-way branches");
2693 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2694 } else {
2695 assert(data->is_JumpData(), "need JumpData for branches");
2696 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2697 }
2698 LIR_Opr md_reg = new_register(T_METADATA);
2699 __ metadata2reg(md->constant_encoding(), md_reg);
2700
2701 increment_counter(new LIR_Address(md_reg, offset,
2702 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2703 }
2704
2705 // emit phi-instruction move after safepoint since this simplifies
2706 // describing the state as the safepoint.
2707 move_to_phi(x->state());
2708
2709 __ jump(x->default_sux());
2710 }
2711
2712 /**
2713 * Emit profiling code if needed for arguments, parameters, return value types
2714 *
2715 * @param md MDO the code will update at runtime
2716 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2717 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2718 * @param profiled_k current profile
2719 * @param obj IR node for the object to be profiled
2720 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2721 * Set once we find an update to make and use for next ones.
2722 * @param not_null true if we know obj cannot be null
2723 * @param signature_at_call_k signature at call for obj
2724 * @param callee_signature_k signature of callee for obj
2725 * at call and callee signatures differ at method handle call
2726 * @return the only klass we know will ever be seen at this profile point
2727 */
2728 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2729 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2730 ciKlass* callee_signature_k) {
2731 ciKlass* result = NULL;
2732 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2733 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2734 // known not to be null or null bit already set and already set to
2735 // unknown: nothing we can do to improve profiling
2736 if (!do_null && !do_update) {
2737 return result;
2738 }
2739
2740 ciKlass* exact_klass = NULL;
2741 Compilation* comp = Compilation::current();
2742 if (do_update) {
2743 // try to find exact type, using CHA if possible, so that loading
2744 // the klass from the object can be avoided
2745 ciType* type = obj->exact_type();
2746 if (type == NULL) {
2747 type = obj->declared_type();
2748 type = comp->cha_exact_type(type);
2749 }
2750 assert(type == NULL || type->is_klass(), "type should be class");
2751 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL;
2752
2753 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2754 }
2755
2756 if (!do_null && !do_update) {
2757 return result;
2758 }
2759
2760 ciKlass* exact_signature_k = NULL;
2761 if (do_update) {
2762 // Is the type from the signature exact (the only one possible)?
2763 exact_signature_k = signature_at_call_k->exact_klass();
2764 if (exact_signature_k == NULL) {
2765 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2766 } else {
2767 result = exact_signature_k;
2768 // Known statically. No need to emit any code: prevent
2769 // LIR_Assembler::emit_profile_type() from emitting useless code
2770 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2771 }
2772 // exact_klass and exact_signature_k can be both non NULL but
2773 // different if exact_klass is loaded after the ciObject for
2774 // exact_signature_k is created.
2775 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) {
2776 // sometimes the type of the signature is better than the best type
2777 // the compiler has
2778 exact_klass = exact_signature_k;
2779 }
2780 if (callee_signature_k != NULL &&
2781 callee_signature_k != signature_at_call_k) {
2782 ciKlass* improved_klass = callee_signature_k->exact_klass();
2783 if (improved_klass == NULL) {
2784 improved_klass = comp->cha_exact_type(callee_signature_k);
2785 }
2786 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) {
2787 exact_klass = exact_signature_k;
2788 }
2789 }
2790 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2791 }
2792
2793 if (!do_null && !do_update) {
2794 return result;
2795 }
2796
2797 if (mdp == LIR_OprFact::illegalOpr) {
2798 mdp = new_register(T_METADATA);
2799 __ metadata2reg(md->constant_encoding(), mdp);
2800 if (md_base_offset != 0) {
2801 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2802 mdp = new_pointer_register();
2803 __ leal(LIR_OprFact::address(base_type_address), mdp);
2804 }
2805 }
2806 LIRItem value(obj, this);
2807 value.load_item();
2808 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2809 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
2810 return result;
2811 }
2812
2813 // profile parameters on entry to the root of the compilation
2814 void LIRGenerator::profile_parameters(Base* x) {
2815 if (compilation()->profile_parameters()) {
2816 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2817 ciMethodData* md = scope()->method()->method_data_or_null();
2818 assert(md != NULL, "Sanity");
2819
2820 if (md->parameters_type_data() != NULL) {
2821 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2822 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2823 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2824 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2825 LIR_Opr src = args->at(i);
2826 assert(!src->is_illegal(), "check");
2827 BasicType t = src->type();
2828 if (t == T_OBJECT || t == T_ARRAY) {
2829 intptr_t profiled_k = parameters->type(j);
2830 Local* local = x->state()->local_at(java_index)->as_Local();
2831 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2832 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2833 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
2834 // If the profile is known statically set it once for all and do not emit any code
2835 if (exact != NULL) {
2836 md->set_parameter_type(j, exact);
2837 }
2838 j++;
2839 }
2840 java_index += type2size[t];
2841 }
2842 }
2843 }
2844 }
2845
2846 void LIRGenerator::do_Base(Base* x) {
2847 __ std_entry(LIR_OprFact::illegalOpr);
2848 // Emit moves from physical registers / stack slots to virtual registers
2849 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2850 IRScope* irScope = compilation()->hir()->top_scope();
2851 int java_index = 0;
2852 for (int i = 0; i < args->length(); i++) {
2853 LIR_Opr src = args->at(i);
2854 assert(!src->is_illegal(), "check");
2855 BasicType t = src->type();
2856
2857 // Types which are smaller than int are passed as int, so
2858 // correct the type which passed.
2859 switch (t) {
2860 case T_BYTE:
2861 case T_BOOLEAN:
2862 case T_SHORT:
2863 case T_CHAR:
2864 t = T_INT;
2865 break;
2866 default:
2867 break;
2868 }
2869
2870 LIR_Opr dest = new_register(t);
2871 __ move(src, dest);
2872
2873 // Assign new location to Local instruction for this local
2874 Local* local = x->state()->local_at(java_index)->as_Local();
2875 assert(local != NULL, "Locals for incoming arguments must have been created");
2876 #ifndef __SOFTFP__
2877 // The java calling convention passes double as long and float as int.
2878 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2879 #endif // __SOFTFP__
2880 local->set_operand(dest);
2881 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
2882 java_index += type2size[t];
2883 }
2884
2885 if (compilation()->env()->dtrace_method_probes()) {
2886 BasicTypeList signature;
2887 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2888 signature.append(T_METADATA); // Method*
2889 LIR_OprList* args = new LIR_OprList();
2890 args->append(getThreadPointer());
2891 LIR_Opr meth = new_register(T_METADATA);
2892 __ metadata2reg(method()->constant_encoding(), meth);
2893 args->append(meth);
2894 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
2895 }
2896
2897 if (method()->is_synchronized()) {
2898 LIR_Opr obj;
2899 if (method()->is_static()) {
2900 obj = new_register(T_OBJECT);
2901 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2902 } else {
2903 Local* receiver = x->state()->local_at(0)->as_Local();
2904 assert(receiver != NULL, "must already exist");
2905 obj = receiver->operand();
2906 }
2907 assert(obj->is_valid(), "must be valid");
2908
2909 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2910 LIR_Opr lock = syncLockOpr();
2911 __ load_stack_address_monitor(0, lock);
2912
2913 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException));
2914 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2915
2916 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
2917 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
2918 }
2919 }
2920 if (compilation()->age_code()) {
2921 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false);
2922 decrement_age(info);
2923 }
2924 // increment invocation counters if needed
2925 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2926 profile_parameters(x);
2927 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false);
2928 increment_invocation_counter(info);
2929 }
2930
2931 // all blocks with a successor must end with an unconditional jump
2932 // to the successor even if they are consecutive
2933 __ jump(x->default_sux());
2934 }
2935
2936
2937 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2938 // construct our frame and model the production of incoming pointer
2939 // to the OSR buffer.
2940 __ osr_entry(LIR_Assembler::osrBufferPointer());
2941 LIR_Opr result = rlock_result(x);
2942 __ move(LIR_Assembler::osrBufferPointer(), result);
2943 }
2944
2945
2946 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2947 assert(args->length() == arg_list->length(),
2948 "args=%d, arg_list=%d", args->length(), arg_list->length());
2949 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2950 LIRItem* param = args->at(i);
2951 LIR_Opr loc = arg_list->at(i);
2952 if (loc->is_register()) {
2953 param->load_item_force(loc);
2954 } else {
2955 LIR_Address* addr = loc->as_address_ptr();
2956 param->load_for_store(addr->type());
2957 assert(addr->type() != T_VALUETYPE, "not supported yet");
2958 if (addr->type() == T_OBJECT) {
2959 __ move_wide(param->result(), addr);
2960 } else
2961 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
2962 __ unaligned_move(param->result(), addr);
2963 } else {
2964 __ move(param->result(), addr);
2965 }
2966 }
2967 }
2968
2969 if (x->has_receiver()) {
2970 LIRItem* receiver = args->at(0);
2971 LIR_Opr loc = arg_list->at(0);
2972 if (loc->is_register()) {
2973 receiver->load_item_force(loc);
2974 } else {
2975 assert(loc->is_address(), "just checking");
2976 receiver->load_for_store(T_OBJECT);
2977 __ move_wide(receiver->result(), loc->as_address_ptr());
2978 }
2979 }
2980 }
2981
2982
2983 // Visits all arguments, returns appropriate items without loading them
2984 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2985 LIRItemList* argument_items = new LIRItemList();
2986 if (x->has_receiver()) {
2987 LIRItem* receiver = new LIRItem(x->receiver(), this);
2988 argument_items->append(receiver);
2989 }
2990 for (int i = 0; i < x->number_of_arguments(); i++) {
2991 LIRItem* param = new LIRItem(x->argument_at(i), this);
2992 argument_items->append(param);
2993 }
2994 return argument_items;
2995 }
2996
2997
2998 // The invoke with receiver has following phases:
2999 // a) traverse and load/lock receiver;
3000 // b) traverse all arguments -> item-array (invoke_visit_argument)
3001 // c) push receiver on stack
3002 // d) load each of the items and push on stack
3003 // e) unlock receiver
3004 // f) move receiver into receiver-register %o0
3005 // g) lock result registers and emit call operation
3006 //
3007 // Before issuing a call, we must spill-save all values on stack
3008 // that are in caller-save register. "spill-save" moves those registers
3009 // either in a free callee-save register or spills them if no free
3010 // callee save register is available.
3011 //
3012 // The problem is where to invoke spill-save.
3013 // - if invoked between e) and f), we may lock callee save
3014 // register in "spill-save" that destroys the receiver register
3015 // before f) is executed
3016 // - if we rearrange f) to be earlier (by loading %o0) it
3017 // may destroy a value on the stack that is currently in %o0
3018 // and is waiting to be spilled
3019 // - if we keep the receiver locked while doing spill-save,
3020 // we cannot spill it as it is spill-locked
3021 //
3022 void LIRGenerator::do_Invoke(Invoke* x) {
3023 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
3024
3025 LIR_OprList* arg_list = cc->args();
3026 LIRItemList* args = invoke_visit_arguments(x);
3027 LIR_Opr receiver = LIR_OprFact::illegalOpr;
3028
3029 // setup result register
3030 LIR_Opr result_register = LIR_OprFact::illegalOpr;
3031 if (x->type() != voidType) {
3032 result_register = result_register_for(x->type());
3033 }
3034
3035 CodeEmitInfo* info = state_for(x, x->state());
3036
3037 invoke_load_arguments(x, args, arg_list);
3038
3039 if (x->has_receiver()) {
3040 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
3041 receiver = args->at(0)->result();
3042 }
3043
3044 // emit invoke code
3045 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
3046
3047 // JSR 292
3048 // Preserve the SP over MethodHandle call sites, if needed.
3049 ciMethod* target = x->target();
3050 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
3051 target->is_method_handle_intrinsic() ||
3052 target->is_compiled_lambda_form());
3053 if (is_method_handle_invoke) {
3054 info->set_is_method_handle_invoke(true);
3055 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
3056 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
3057 }
3058 }
3059
3060 switch (x->code()) {
3061 case Bytecodes::_invokestatic:
3062 __ call_static(target, result_register,
3063 SharedRuntime::get_resolve_static_call_stub(),
3064 arg_list, info);
3065 break;
3066 case Bytecodes::_invokespecial:
3067 case Bytecodes::_invokevirtual:
3068 case Bytecodes::_invokeinterface:
3069 // for loaded and final (method or class) target we still produce an inline cache,
3070 // in order to be able to call mixed mode
3071 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) {
3072 __ call_opt_virtual(target, receiver, result_register,
3073 SharedRuntime::get_resolve_opt_virtual_call_stub(),
3074 arg_list, info);
3075 } else if (x->vtable_index() < 0) {
3076 __ call_icvirtual(target, receiver, result_register,
3077 SharedRuntime::get_resolve_virtual_call_stub(),
3078 arg_list, info);
3079 } else {
3080 int entry_offset = in_bytes(Klass::vtable_start_offset()) + x->vtable_index() * vtableEntry::size_in_bytes();
3081 int vtable_offset = entry_offset + vtableEntry::method_offset_in_bytes();
3082 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info);
3083 }
3084 break;
3085 case Bytecodes::_invokedynamic: {
3086 __ call_dynamic(target, receiver, result_register,
3087 SharedRuntime::get_resolve_static_call_stub(),
3088 arg_list, info);
3089 break;
3090 }
3091 default:
3092 fatal("unexpected bytecode: %s", Bytecodes::name(x->code()));
3093 break;
3094 }
3095
3096 // JSR 292
3097 // Restore the SP after MethodHandle call sites, if needed.
3098 if (is_method_handle_invoke
3099 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
3100 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
3101 }
3102
3103 if (x->type()->is_float() || x->type()->is_double()) {
3104 // Force rounding of results from non-strictfp when in strictfp
3105 // scope (or when we don't know the strictness of the callee, to
3106 // be safe.)
3107 if (method()->is_strict()) {
3108 if (!x->target_is_loaded() || !x->target_is_strictfp()) {
3109 result_register = round_item(result_register);
3110 }
3111 }
3112 }
3113
3114 if (result_register->is_valid()) {
3115 LIR_Opr result = rlock_result(x);
3116 __ move(result_register, result);
3117 }
3118 }
3119
3120
3121 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
3122 assert(x->number_of_arguments() == 1, "wrong type");
3123 LIRItem value (x->argument_at(0), this);
3124 LIR_Opr reg = rlock_result(x);
3125 value.load_item();
3126 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
3127 __ move(tmp, reg);
3128 }
3129
3130
3131
3132 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
3133 void LIRGenerator::do_IfOp(IfOp* x) {
3134 #ifdef ASSERT
3135 {
3136 ValueTag xtag = x->x()->type()->tag();
3137 ValueTag ttag = x->tval()->type()->tag();
3138 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
3139 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
3140 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
3141 }
3142 #endif
3143
3144 LIRItem left(x->x(), this);
3145 LIRItem right(x->y(), this);
3146 left.load_item();
3147 if (can_inline_as_constant(right.value())) {
3148 right.dont_load_item();
3149 } else {
3150 right.load_item();
3151 }
3152
3153 LIRItem t_val(x->tval(), this);
3154 LIRItem f_val(x->fval(), this);
3155 t_val.dont_load_item();
3156 f_val.dont_load_item();
3157 LIR_Opr reg = rlock_result(x);
3158
3159 __ cmp(lir_cond(x->cond()), left.result(), right.result());
3160 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
3161 }
3162
3163 #ifdef JFR_HAVE_INTRINSICS
3164 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) {
3165 CodeEmitInfo* info = state_for(x);
3166 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check
3167
3168 assert(info != NULL, "must have info");
3169 LIRItem arg(x->argument_at(0), this);
3170
3171 arg.load_item();
3172 LIR_Opr klass = new_register(T_METADATA);
3173 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), T_ADDRESS), klass, info);
3174 LIR_Opr id = new_register(T_LONG);
3175 ByteSize offset = KLASS_TRACE_ID_OFFSET;
3176 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG);
3177
3178 __ move(trace_id_addr, id);
3179 __ logical_or(id, LIR_OprFact::longConst(0x01l), id);
3180 __ store(id, trace_id_addr);
3181
3182 #ifdef TRACE_ID_META_BITS
3183 __ logical_and(id, LIR_OprFact::longConst(~TRACE_ID_META_BITS), id);
3184 #endif
3185 #ifdef TRACE_ID_SHIFT
3186 __ unsigned_shift_right(id, TRACE_ID_SHIFT, id);
3187 #endif
3188
3189 __ move(id, rlock_result(x));
3190 }
3191
3192 void LIRGenerator::do_getEventWriter(Intrinsic* x) {
3193 LabelObj* L_end = new LabelObj();
3194
3195 LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(),
3196 in_bytes(THREAD_LOCAL_WRITER_OFFSET_JFR),
3197 T_OBJECT);
3198 LIR_Opr result = rlock_result(x);
3199 __ move_wide(jobj_addr, result);
3200 __ cmp(lir_cond_equal, result, LIR_OprFact::oopConst(NULL));
3201 __ branch(lir_cond_equal, T_OBJECT, L_end->label());
3202
3203 LIR_Opr jobj = new_register(T_OBJECT);
3204 __ move(result, jobj);
3205 access_load(IN_NATIVE, T_OBJECT, LIR_OprFact::address(new LIR_Address(jobj, T_OBJECT)), result);
3206
3207 __ branch_destination(L_end->label());
3208 }
3209
3210 #endif
3211
3212
3213 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
3214 assert(x->number_of_arguments() == 0, "wrong type");
3215 // Enforce computation of _reserved_argument_area_size which is required on some platforms.
3216 BasicTypeList signature;
3217 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
3218 LIR_Opr reg = result_register_for(x->type());
3219 __ call_runtime_leaf(routine, getThreadTemp(),
3220 reg, new LIR_OprList());
3221 LIR_Opr result = rlock_result(x);
3222 __ move(reg, result);
3223 }
3224
3225
3226
3227 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
3228 switch (x->id()) {
3229 case vmIntrinsics::_intBitsToFloat :
3230 case vmIntrinsics::_doubleToRawLongBits :
3231 case vmIntrinsics::_longBitsToDouble :
3232 case vmIntrinsics::_floatToRawIntBits : {
3233 do_FPIntrinsics(x);
3234 break;
3235 }
3236
3237 #ifdef JFR_HAVE_INTRINSICS
3238 case vmIntrinsics::_getClassId:
3239 do_ClassIDIntrinsic(x);
3240 break;
3241 case vmIntrinsics::_getEventWriter:
3242 do_getEventWriter(x);
3243 break;
3244 case vmIntrinsics::_counterTime:
3245 do_RuntimeCall(CAST_FROM_FN_PTR(address, JFR_TIME_FUNCTION), x);
3246 break;
3247 #endif
3248
3249 case vmIntrinsics::_currentTimeMillis:
3250 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x);
3251 break;
3252
3253 case vmIntrinsics::_nanoTime:
3254 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x);
3255 break;
3256
3257 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
3258 case vmIntrinsics::_isInstance: do_isInstance(x); break;
3259 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break;
3260 case vmIntrinsics::_getClass: do_getClass(x); break;
3261 case vmIntrinsics::_currentThread: do_currentThread(x); break;
3262
3263 case vmIntrinsics::_dlog: // fall through
3264 case vmIntrinsics::_dlog10: // fall through
3265 case vmIntrinsics::_dabs: // fall through
3266 case vmIntrinsics::_dsqrt: // fall through
3267 case vmIntrinsics::_dtan: // fall through
3268 case vmIntrinsics::_dsin : // fall through
3269 case vmIntrinsics::_dcos : // fall through
3270 case vmIntrinsics::_dexp : // fall through
3271 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
3272 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
3273
3274 case vmIntrinsics::_fmaD: do_FmaIntrinsic(x); break;
3275 case vmIntrinsics::_fmaF: do_FmaIntrinsic(x); break;
3276
3277 // java.nio.Buffer.checkIndex
3278 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
3279
3280 case vmIntrinsics::_compareAndSetReference:
3281 do_CompareAndSwap(x, objectType);
3282 break;
3283 case vmIntrinsics::_compareAndSetInt:
3284 do_CompareAndSwap(x, intType);
3285 break;
3286 case vmIntrinsics::_compareAndSetLong:
3287 do_CompareAndSwap(x, longType);
3288 break;
3289
3290 case vmIntrinsics::_loadFence :
3291 __ membar_acquire();
3292 break;
3293 case vmIntrinsics::_storeFence:
3294 __ membar_release();
3295 break;
3296 case vmIntrinsics::_fullFence :
3297 __ membar();
3298 break;
3299 case vmIntrinsics::_onSpinWait:
3300 __ on_spin_wait();
3301 break;
3302 case vmIntrinsics::_Reference_get:
3303 do_Reference_get(x);
3304 break;
3305
3306 case vmIntrinsics::_updateCRC32:
3307 case vmIntrinsics::_updateBytesCRC32:
3308 case vmIntrinsics::_updateByteBufferCRC32:
3309 do_update_CRC32(x);
3310 break;
3311
3312 case vmIntrinsics::_updateBytesCRC32C:
3313 case vmIntrinsics::_updateDirectByteBufferCRC32C:
3314 do_update_CRC32C(x);
3315 break;
3316
3317 case vmIntrinsics::_vectorizedMismatch:
3318 do_vectorizedMismatch(x);
3319 break;
3320
3321 default: ShouldNotReachHere(); break;
3322 }
3323 }
3324
3325 void LIRGenerator::profile_arguments(ProfileCall* x) {
3326 if (compilation()->profile_arguments()) {
3327 int bci = x->bci_of_invoke();
3328 ciMethodData* md = x->method()->method_data_or_null();
3329 assert(md != NULL, "Sanity");
3330 ciProfileData* data = md->bci_to_data(bci);
3331 if (data != NULL) {
3332 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3333 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3334 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3335 int base_offset = md->byte_offset_of_slot(data, extra);
3336 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3337 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3338
3339 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3340 int start = 0;
3341 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3342 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3343 // first argument is not profiled at call (method handle invoke)
3344 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3345 start = 1;
3346 }
3347 ciSignature* callee_signature = x->callee()->signature();
3348 // method handle call to virtual method
3349 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3350 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
3351
3352 bool ignored_will_link;
3353 ciSignature* signature_at_call = NULL;
3354 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3355 ciSignatureStream signature_at_call_stream(signature_at_call);
3356
3357 // if called through method handle invoke, some arguments may have been popped
3358 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3359 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3360 ciKlass* exact = profile_type(md, base_offset, off,
3361 args->type(i), x->profiled_arg_at(i+start), mdp,
3362 !x->arg_needs_null_check(i+start),
3363 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3364 if (exact != NULL) {
3365 md->set_argument_type(bci, i, exact);
3366 }
3367 }
3368 } else {
3369 #ifdef ASSERT
3370 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3371 int n = x->nb_profiled_args();
3372 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3373 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3374 "only at JSR292 bytecodes");
3375 #endif
3376 }
3377 }
3378 }
3379 }
3380
3381 // profile parameters on entry to an inlined method
3382 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3383 if (compilation()->profile_parameters() && x->inlined()) {
3384 ciMethodData* md = x->callee()->method_data_or_null();
3385 if (md != NULL) {
3386 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3387 if (parameters_type_data != NULL) {
3388 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3389 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3390 bool has_receiver = !x->callee()->is_static();
3391 ciSignature* sig = x->callee()->signature();
3392 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
3393 int i = 0; // to iterate on the Instructions
3394 Value arg = x->recv();
3395 bool not_null = false;
3396 int bci = x->bci_of_invoke();
3397 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3398 // The first parameter is the receiver so that's what we start
3399 // with if it exists. One exception is method handle call to
3400 // virtual method: the receiver is in the args list
3401 if (arg == NULL || !Bytecodes::has_receiver(bc)) {
3402 i = 1;
3403 arg = x->profiled_arg_at(0);
3404 not_null = !x->arg_needs_null_check(0);
3405 }
3406 int k = 0; // to iterate on the profile data
3407 for (;;) {
3408 intptr_t profiled_k = parameters->type(k);
3409 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3410 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3411 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
3412 // If the profile is known statically set it once for all and do not emit any code
3413 if (exact != NULL) {
3414 md->set_parameter_type(k, exact);
3415 }
3416 k++;
3417 if (k >= parameters_type_data->number_of_parameters()) {
3418 #ifdef ASSERT
3419 int extra = 0;
3420 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3421 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3422 x->recv() != NULL && Bytecodes::has_receiver(bc)) {
3423 extra += 1;
3424 }
3425 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3426 #endif
3427 break;
3428 }
3429 arg = x->profiled_arg_at(i);
3430 not_null = !x->arg_needs_null_check(i);
3431 i++;
3432 }
3433 }
3434 }
3435 }
3436 }
3437
3438 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3439 // Need recv in a temporary register so it interferes with the other temporaries
3440 LIR_Opr recv = LIR_OprFact::illegalOpr;
3441 LIR_Opr mdo = new_register(T_METADATA);
3442 // tmp is used to hold the counters on SPARC
3443 LIR_Opr tmp = new_pointer_register();
3444
3445 if (x->nb_profiled_args() > 0) {
3446 profile_arguments(x);
3447 }
3448
3449 // profile parameters on inlined method entry including receiver
3450 if (x->recv() != NULL || x->nb_profiled_args() > 0) {
3451 profile_parameters_at_call(x);
3452 }
3453
3454 if (x->recv() != NULL) {
3455 LIRItem value(x->recv(), this);
3456 value.load_item();
3457 recv = new_register(T_OBJECT);
3458 __ move(value.result(), recv);
3459 }
3460 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3461 }
3462
3463 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
3464 int bci = x->bci_of_invoke();
3465 ciMethodData* md = x->method()->method_data_or_null();
3466 assert(md != NULL, "Sanity");
3467 ciProfileData* data = md->bci_to_data(bci);
3468 if (data != NULL) {
3469 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3470 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3471 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3472
3473 bool ignored_will_link;
3474 ciSignature* signature_at_call = NULL;
3475 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3476
3477 // The offset within the MDO of the entry to update may be too large
3478 // to be used in load/store instructions on some platforms. So have
3479 // profile_type() compute the address of the profile in a register.
3480 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3481 ret->type(), x->ret(), mdp,
3482 !x->needs_null_check(),
3483 signature_at_call->return_type()->as_klass(),
3484 x->callee()->signature()->return_type()->as_klass());
3485 if (exact != NULL) {
3486 md->set_return_type(bci, exact);
3487 }
3488 }
3489 }
3490
3491 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3492 // We can safely ignore accessors here, since c2 will inline them anyway,
3493 // accessors are also always mature.
3494 if (!x->inlinee()->is_accessor()) {
3495 CodeEmitInfo* info = state_for(x, x->state(), true);
3496 // Notify the runtime very infrequently only to take care of counter overflows
3497 int freq_log = Tier23InlineeNotifyFreqLog;
3498 double scale;
3499 if (_method->has_option_value("CompileThresholdScaling", scale)) {
3500 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3501 }
3502 increment_event_counter_impl(info, x->inlinee(), LIR_OprFact::intConst(InvocationCounter::count_increment), right_n_bits(freq_log), InvocationEntryBci, false, true);
3503 }
3504 }
3505
3506 void LIRGenerator::increment_backedge_counter_conditionally(LIR_Condition cond, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info, int left_bci, int right_bci, int bci) {
3507 if (compilation()->count_backedges()) {
3508 __ cmp(cond, left, right);
3509 LIR_Opr step = new_register(T_INT);
3510 LIR_Opr plus_one = LIR_OprFact::intConst(InvocationCounter::count_increment);
3511 LIR_Opr zero = LIR_OprFact::intConst(0);
3512 __ cmove(cond,
3513 (left_bci < bci) ? plus_one : zero,
3514 (right_bci < bci) ? plus_one : zero,
3515 step, left->type());
3516 increment_backedge_counter(info, step, bci);
3517 }
3518 }
3519
3520
3521 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge) {
3522 int freq_log = 0;
3523 int level = compilation()->env()->comp_level();
3524 if (level == CompLevel_limited_profile) {
3525 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3526 } else if (level == CompLevel_full_profile) {
3527 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3528 } else {
3529 ShouldNotReachHere();
3530 }
3531 // Increment the appropriate invocation/backedge counter and notify the runtime.
3532 double scale;
3533 if (_method->has_option_value("CompileThresholdScaling", scale)) {
3534 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3535 }
3536 increment_event_counter_impl(info, info->scope()->method(), step, right_n_bits(freq_log), bci, backedge, true);
3537 }
3538
3539 void LIRGenerator::decrement_age(CodeEmitInfo* info) {
3540 ciMethod* method = info->scope()->method();
3541 MethodCounters* mc_adr = method->ensure_method_counters();
3542 if (mc_adr != NULL) {
3543 LIR_Opr mc = new_pointer_register();
3544 __ move(LIR_OprFact::intptrConst(mc_adr), mc);
3545 int offset = in_bytes(MethodCounters::nmethod_age_offset());
3546 LIR_Address* counter = new LIR_Address(mc, offset, T_INT);
3547 LIR_Opr result = new_register(T_INT);
3548 __ load(counter, result);
3549 __ sub(result, LIR_OprFact::intConst(1), result);
3550 __ store(result, counter);
3551 // DeoptimizeStub will reexecute from the current state in code info.
3552 CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured,
3553 Deoptimization::Action_make_not_entrant);
3554 __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0));
3555 __ branch(lir_cond_lessEqual, T_INT, deopt);
3556 }
3557 }
3558
3559
3560 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3561 ciMethod *method, LIR_Opr step, int frequency,
3562 int bci, bool backedge, bool notify) {
3563 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3564 int level = _compilation->env()->comp_level();
3565 assert(level > CompLevel_simple, "Shouldn't be here");
3566
3567 int offset = -1;
3568 LIR_Opr counter_holder = NULL;
3569 if (level == CompLevel_limited_profile) {
3570 MethodCounters* counters_adr = method->ensure_method_counters();
3571 if (counters_adr == NULL) {
3572 bailout("method counters allocation failed");
3573 return;
3574 }
3575 counter_holder = new_pointer_register();
3576 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3577 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3578 MethodCounters::invocation_counter_offset());
3579 } else if (level == CompLevel_full_profile) {
3580 counter_holder = new_register(T_METADATA);
3581 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3582 MethodData::invocation_counter_offset());
3583 ciMethodData* md = method->method_data_or_null();
3584 assert(md != NULL, "Sanity");
3585 __ metadata2reg(md->constant_encoding(), counter_holder);
3586 } else {
3587 ShouldNotReachHere();
3588 }
3589 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3590 LIR_Opr result = new_register(T_INT);
3591 __ load(counter, result);
3592 __ add(result, step, result);
3593 __ store(result, counter);
3594 if (notify && (!backedge || UseOnStackReplacement)) {
3595 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding());
3596 // The bci for info can point to cmp for if's we want the if bci
3597 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3598 int freq = frequency << InvocationCounter::count_shift;
3599 if (freq == 0) {
3600 if (!step->is_constant()) {
3601 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3602 __ branch(lir_cond_notEqual, T_ILLEGAL, overflow);
3603 } else {
3604 __ branch(lir_cond_always, T_ILLEGAL, overflow);
3605 }
3606 } else {
3607 LIR_Opr mask = load_immediate(freq, T_INT);
3608 if (!step->is_constant()) {
3609 // If step is 0, make sure the overflow check below always fails
3610 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3611 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT);
3612 }
3613 __ logical_and(result, mask, result);
3614 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3615 __ branch(lir_cond_equal, T_INT, overflow);
3616 }
3617 __ branch_destination(overflow->continuation());
3618 }
3619 }
3620
3621 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3622 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3623 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3624
3625 if (x->pass_thread()) {
3626 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3627 args->append(getThreadPointer());
3628 }
3629
3630 for (int i = 0; i < x->number_of_arguments(); i++) {
3631 Value a = x->argument_at(i);
3632 LIRItem* item = new LIRItem(a, this);
3633 item->load_item();
3634 args->append(item->result());
3635 signature->append(as_BasicType(a->type()));
3636 }
3637
3638 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL);
3639 if (x->type() == voidType) {
3640 set_no_result(x);
3641 } else {
3642 __ move(result, rlock_result(x));
3643 }
3644 }
3645
3646 #ifdef ASSERT
3647 void LIRGenerator::do_Assert(Assert *x) {
3648 ValueTag tag = x->x()->type()->tag();
3649 If::Condition cond = x->cond();
3650
3651 LIRItem xitem(x->x(), this);
3652 LIRItem yitem(x->y(), this);
3653 LIRItem* xin = &xitem;
3654 LIRItem* yin = &yitem;
3655
3656 assert(tag == intTag, "Only integer assertions are valid!");
3657
3658 xin->load_item();
3659 yin->dont_load_item();
3660
3661 set_no_result(x);
3662
3663 LIR_Opr left = xin->result();
3664 LIR_Opr right = yin->result();
3665
3666 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3667 }
3668 #endif
3669
3670 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3671
3672
3673 Instruction *a = x->x();
3674 Instruction *b = x->y();
3675 if (!a || StressRangeCheckElimination) {
3676 assert(!b || StressRangeCheckElimination, "B must also be null");
3677
3678 CodeEmitInfo *info = state_for(x, x->state());
3679 CodeStub* stub = new PredicateFailedStub(info);
3680
3681 __ jump(stub);
3682 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3683 int a_int = a->type()->as_IntConstant()->value();
3684 int b_int = b->type()->as_IntConstant()->value();
3685
3686 bool ok = false;
3687
3688 switch(x->cond()) {
3689 case Instruction::eql: ok = (a_int == b_int); break;
3690 case Instruction::neq: ok = (a_int != b_int); break;
3691 case Instruction::lss: ok = (a_int < b_int); break;
3692 case Instruction::leq: ok = (a_int <= b_int); break;
3693 case Instruction::gtr: ok = (a_int > b_int); break;
3694 case Instruction::geq: ok = (a_int >= b_int); break;
3695 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3696 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3697 default: ShouldNotReachHere();
3698 }
3699
3700 if (ok) {
3701
3702 CodeEmitInfo *info = state_for(x, x->state());
3703 CodeStub* stub = new PredicateFailedStub(info);
3704
3705 __ jump(stub);
3706 }
3707 } else {
3708
3709 ValueTag tag = x->x()->type()->tag();
3710 If::Condition cond = x->cond();
3711 LIRItem xitem(x->x(), this);
3712 LIRItem yitem(x->y(), this);
3713 LIRItem* xin = &xitem;
3714 LIRItem* yin = &yitem;
3715
3716 assert(tag == intTag, "Only integer deoptimizations are valid!");
3717
3718 xin->load_item();
3719 yin->dont_load_item();
3720 set_no_result(x);
3721
3722 LIR_Opr left = xin->result();
3723 LIR_Opr right = yin->result();
3724
3725 CodeEmitInfo *info = state_for(x, x->state());
3726 CodeStub* stub = new PredicateFailedStub(info);
3727
3728 __ cmp(lir_cond(cond), left, right);
3729 __ branch(lir_cond(cond), right->type(), stub);
3730 }
3731 }
3732
3733
3734 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3735 LIRItemList args(1);
3736 LIRItem value(arg1, this);
3737 args.append(&value);
3738 BasicTypeList signature;
3739 signature.append(as_BasicType(arg1->type()));
3740
3741 return call_runtime(&signature, &args, entry, result_type, info);
3742 }
3743
3744
3745 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3746 LIRItemList args(2);
3747 LIRItem value1(arg1, this);
3748 LIRItem value2(arg2, this);
3749 args.append(&value1);
3750 args.append(&value2);
3751 BasicTypeList signature;
3752 signature.append(as_BasicType(arg1->type()));
3753 signature.append(as_BasicType(arg2->type()));
3754
3755 return call_runtime(&signature, &args, entry, result_type, info);
3756 }
3757
3758
3759 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3760 address entry, ValueType* result_type, CodeEmitInfo* info) {
3761 // get a result register
3762 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3763 LIR_Opr result = LIR_OprFact::illegalOpr;
3764 if (result_type->tag() != voidTag) {
3765 result = new_register(result_type);
3766 phys_reg = result_register_for(result_type);
3767 }
3768
3769 // move the arguments into the correct location
3770 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3771 assert(cc->length() == args->length(), "argument mismatch");
3772 for (int i = 0; i < args->length(); i++) {
3773 LIR_Opr arg = args->at(i);
3774 LIR_Opr loc = cc->at(i);
3775 if (loc->is_register()) {
3776 __ move(arg, loc);
3777 } else {
3778 LIR_Address* addr = loc->as_address_ptr();
3779 // if (!can_store_as_constant(arg)) {
3780 // LIR_Opr tmp = new_register(arg->type());
3781 // __ move(arg, tmp);
3782 // arg = tmp;
3783 // }
3784 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3785 __ unaligned_move(arg, addr);
3786 } else {
3787 __ move(arg, addr);
3788 }
3789 }
3790 }
3791
3792 if (info) {
3793 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3794 } else {
3795 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3796 }
3797 if (result->is_valid()) {
3798 __ move(phys_reg, result);
3799 }
3800 return result;
3801 }
3802
3803
3804 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3805 address entry, ValueType* result_type, CodeEmitInfo* info) {
3806 // get a result register
3807 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3808 LIR_Opr result = LIR_OprFact::illegalOpr;
3809 if (result_type->tag() != voidTag) {
3810 result = new_register(result_type);
3811 phys_reg = result_register_for(result_type);
3812 }
3813
3814 // move the arguments into the correct location
3815 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3816
3817 assert(cc->length() == args->length(), "argument mismatch");
3818 for (int i = 0; i < args->length(); i++) {
3819 LIRItem* arg = args->at(i);
3820 LIR_Opr loc = cc->at(i);
3821 if (loc->is_register()) {
3822 arg->load_item_force(loc);
3823 } else {
3824 LIR_Address* addr = loc->as_address_ptr();
3825 arg->load_for_store(addr->type());
3826 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3827 __ unaligned_move(arg->result(), addr);
3828 } else {
3829 __ move(arg->result(), addr);
3830 }
3831 }
3832 }
3833
3834 if (info) {
3835 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3836 } else {
3837 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3838 }
3839 if (result->is_valid()) {
3840 __ move(phys_reg, result);
3841 }
3842 return result;
3843 }
3844
3845 void LIRGenerator::do_MemBar(MemBar* x) {
3846 LIR_Code code = x->code();
3847 switch(code) {
3848 case lir_membar_acquire : __ membar_acquire(); break;
3849 case lir_membar_release : __ membar_release(); break;
3850 case lir_membar : __ membar(); break;
3851 case lir_membar_loadload : __ membar_loadload(); break;
3852 case lir_membar_storestore: __ membar_storestore(); break;
3853 case lir_membar_loadstore : __ membar_loadstore(); break;
3854 case lir_membar_storeload : __ membar_storeload(); break;
3855 default : ShouldNotReachHere(); break;
3856 }
3857 }
3858
3859 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3860 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3861 if (TwoOperandLIRForm) {
3862 __ move(value, value_fixed);
3863 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3864 } else {
3865 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3866 }
3867 LIR_Opr klass = new_register(T_METADATA);
3868 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
3869 null_check_info = NULL;
3870 LIR_Opr layout = new_register(T_INT);
3871 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3872 int diffbit = Klass::layout_helper_boolean_diffbit();
3873 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3874 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3875 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3876 value = value_fixed;
3877 return value;
3878 }
3879
3880 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3881 if (x->check_boolean()) {
3882 value = mask_boolean(array, value, null_check_info);
3883 }
3884 return value;
3885 }