1 /*
2 * Copyright (c) 2005, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_Instruction.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_LIRGenerator.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "ci/ciObjArray.hpp"
36 #include "ci/ciUtilities.hpp"
37 #include "gc/shared/barrierSet.hpp"
38 #include "gc/shared/c1/barrierSetC1.hpp"
39 #include "oops/klass.inline.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "runtime/vm_version.hpp"
43 #include "utilities/bitMap.inline.hpp"
44 #include "utilities/macros.hpp"
45 #include "utilities/powerOfTwo.hpp"
46
47 #ifdef ASSERT
48 #define __ gen()->lir(__FILE__, __LINE__)->
49 #else
50 #define __ gen()->lir()->
51 #endif
52
53 #ifndef PATCHED_ADDR
54 #define PATCHED_ADDR (max_jint)
55 #endif
56
57 void PhiResolverState::reset() {
58 _virtual_operands.clear();
59 _other_operands.clear();
60 _vreg_table.clear();
61 }
62
63
64 //--------------------------------------------------------------
65 // PhiResolver
66
67 // Resolves cycles:
68 //
69 // r1 := r2 becomes temp := r1
70 // r2 := r1 r1 := r2
71 // r2 := temp
72 // and orders moves:
73 //
74 // r2 := r3 becomes r1 := r2
75 // r1 := r2 r2 := r3
76
77 PhiResolver::PhiResolver(LIRGenerator* gen)
78 : _gen(gen)
79 , _state(gen->resolver_state())
80 , _temp(LIR_OprFact::illegalOpr)
81 {
82 // reinitialize the shared state arrays
83 _state.reset();
84 }
85
86
87 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
88 assert(src->is_valid(), "");
89 assert(dest->is_valid(), "");
90 __ move(src, dest);
91 }
92
93
94 void PhiResolver::move_temp_to(LIR_Opr dest) {
95 assert(_temp->is_valid(), "");
96 emit_move(_temp, dest);
97 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
98 }
99
100
101 void PhiResolver::move_to_temp(LIR_Opr src) {
102 assert(_temp->is_illegal(), "");
103 _temp = _gen->new_register(src->type());
104 emit_move(src, _temp);
105 }
106
107
108 // Traverse assignment graph in depth first order and generate moves in post order
109 // ie. two assignments: b := c, a := b start with node c:
110 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a)
111 // Generates moves in this order: move b to a and move c to b
112 // ie. cycle a := b, b := a start with node a
113 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a)
114 // Generates moves in this order: move b to temp, move a to b, move temp to a
115 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
116 if (!dest->visited()) {
117 dest->set_visited();
118 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
119 move(dest, dest->destination_at(i));
120 }
121 } else if (!dest->start_node()) {
122 // cylce in graph detected
123 assert(_loop == NULL, "only one loop valid!");
124 _loop = dest;
125 move_to_temp(src->operand());
126 return;
127 } // else dest is a start node
128
129 if (!dest->assigned()) {
130 if (_loop == dest) {
131 move_temp_to(dest->operand());
132 dest->set_assigned();
133 } else if (src != NULL) {
134 emit_move(src->operand(), dest->operand());
135 dest->set_assigned();
136 }
137 }
138 }
139
140
141 PhiResolver::~PhiResolver() {
142 int i;
143 // resolve any cycles in moves from and to virtual registers
144 for (i = virtual_operands().length() - 1; i >= 0; i --) {
145 ResolveNode* node = virtual_operands().at(i);
146 if (!node->visited()) {
147 _loop = NULL;
148 move(NULL, node);
149 node->set_start_node();
150 assert(_temp->is_illegal(), "move_temp_to() call missing");
151 }
152 }
153
154 // generate move for move from non virtual register to abitrary destination
155 for (i = other_operands().length() - 1; i >= 0; i --) {
156 ResolveNode* node = other_operands().at(i);
157 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
158 emit_move(node->operand(), node->destination_at(j)->operand());
159 }
160 }
161 }
162
163
164 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
165 ResolveNode* node;
166 if (opr->is_virtual()) {
167 int vreg_num = opr->vreg_number();
168 node = vreg_table().at_grow(vreg_num, NULL);
169 assert(node == NULL || node->operand() == opr, "");
170 if (node == NULL) {
171 node = new ResolveNode(opr);
172 vreg_table().at_put(vreg_num, node);
173 }
174 // Make sure that all virtual operands show up in the list when
175 // they are used as the source of a move.
176 if (source && !virtual_operands().contains(node)) {
177 virtual_operands().append(node);
178 }
179 } else {
180 assert(source, "");
181 node = new ResolveNode(opr);
182 other_operands().append(node);
183 }
184 return node;
185 }
186
187
188 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
189 assert(dest->is_virtual(), "");
190 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
191 assert(src->is_valid(), "");
192 assert(dest->is_valid(), "");
193 ResolveNode* source = source_node(src);
194 source->append(destination_node(dest));
195 }
196
197
198 //--------------------------------------------------------------
199 // LIRItem
200
201 void LIRItem::set_result(LIR_Opr opr) {
202 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
203 value()->set_operand(opr);
204
205 if (opr->is_virtual()) {
206 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL);
207 }
208
209 _result = opr;
210 }
211
212 void LIRItem::load_item() {
213 if (result()->is_illegal()) {
214 // update the items result
215 _result = value()->operand();
216 }
217 if (!result()->is_register()) {
218 LIR_Opr reg = _gen->new_register(value()->type());
219 __ move(result(), reg);
220 if (result()->is_constant()) {
221 _result = reg;
222 } else {
223 set_result(reg);
224 }
225 }
226 }
227
228
229 void LIRItem::load_for_store(BasicType type) {
230 if (_gen->can_store_as_constant(value(), type)) {
231 _result = value()->operand();
232 if (!_result->is_constant()) {
233 _result = LIR_OprFact::value_type(value()->type());
234 }
235 } else if (type == T_BYTE || type == T_BOOLEAN) {
236 load_byte_item();
237 } else {
238 load_item();
239 }
240 }
241
242 void LIRItem::load_item_force(LIR_Opr reg) {
243 LIR_Opr r = result();
244 if (r != reg) {
245 #if !defined(ARM) && !defined(E500V2)
246 if (r->type() != reg->type()) {
247 // moves between different types need an intervening spill slot
248 r = _gen->force_to_spill(r, reg->type());
249 }
250 #endif
251 __ move(r, reg);
252 _result = reg;
253 }
254 }
255
256 ciObject* LIRItem::get_jobject_constant() const {
257 ObjectType* oc = type()->as_ObjectType();
258 if (oc) {
259 return oc->constant_value();
260 }
261 return NULL;
262 }
263
264
265 jint LIRItem::get_jint_constant() const {
266 assert(is_constant() && value() != NULL, "");
267 assert(type()->as_IntConstant() != NULL, "type check");
268 return type()->as_IntConstant()->value();
269 }
270
271
272 jint LIRItem::get_address_constant() const {
273 assert(is_constant() && value() != NULL, "");
274 assert(type()->as_AddressConstant() != NULL, "type check");
275 return type()->as_AddressConstant()->value();
276 }
277
278
279 jfloat LIRItem::get_jfloat_constant() const {
280 assert(is_constant() && value() != NULL, "");
281 assert(type()->as_FloatConstant() != NULL, "type check");
282 return type()->as_FloatConstant()->value();
283 }
284
285
286 jdouble LIRItem::get_jdouble_constant() const {
287 assert(is_constant() && value() != NULL, "");
288 assert(type()->as_DoubleConstant() != NULL, "type check");
289 return type()->as_DoubleConstant()->value();
290 }
291
292
293 jlong LIRItem::get_jlong_constant() const {
294 assert(is_constant() && value() != NULL, "");
295 assert(type()->as_LongConstant() != NULL, "type check");
296 return type()->as_LongConstant()->value();
297 }
298
299
300
301 //--------------------------------------------------------------
302
303
304 void LIRGenerator::block_do_prolog(BlockBegin* block) {
305 #ifndef PRODUCT
306 if (PrintIRWithLIR) {
307 block->print();
308 }
309 #endif
310
311 // set up the list of LIR instructions
312 assert(block->lir() == NULL, "LIR list already computed for this block");
313 _lir = new LIR_List(compilation(), block);
314 block->set_lir(_lir);
315
316 __ branch_destination(block->label());
317
318 if (LIRTraceExecution &&
319 Compilation::current()->hir()->start()->block_id() != block->block_id() &&
320 !block->is_set(BlockBegin::exception_entry_flag)) {
321 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
322 trace_block_entry(block);
323 }
324 }
325
326
327 void LIRGenerator::block_do_epilog(BlockBegin* block) {
328 #ifndef PRODUCT
329 if (PrintIRWithLIR) {
330 tty->cr();
331 }
332 #endif
333
334 // LIR_Opr for unpinned constants shouldn't be referenced by other
335 // blocks so clear them out after processing the block.
336 for (int i = 0; i < _unpinned_constants.length(); i++) {
337 _unpinned_constants.at(i)->clear_operand();
338 }
339 _unpinned_constants.trunc_to(0);
340
341 // clear our any registers for other local constants
342 _constants.trunc_to(0);
343 _reg_for_constants.trunc_to(0);
344 }
345
346
347 void LIRGenerator::block_do(BlockBegin* block) {
348 CHECK_BAILOUT();
349
350 block_do_prolog(block);
351 set_block(block);
352
353 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
354 if (instr->is_pinned()) do_root(instr);
355 }
356
357 set_block(NULL);
358 block_do_epilog(block);
359 }
360
361
362 //-------------------------LIRGenerator-----------------------------
363
364 // This is where the tree-walk starts; instr must be root;
365 void LIRGenerator::do_root(Value instr) {
366 CHECK_BAILOUT();
367
368 InstructionMark im(compilation(), instr);
369
370 assert(instr->is_pinned(), "use only with roots");
371 assert(instr->subst() == instr, "shouldn't have missed substitution");
372
373 instr->visit(this);
374
375 assert(!instr->has_uses() || instr->operand()->is_valid() ||
376 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
377 }
378
379
380 // This is called for each node in tree; the walk stops if a root is reached
381 void LIRGenerator::walk(Value instr) {
382 InstructionMark im(compilation(), instr);
383 //stop walk when encounter a root
384 if ((instr->is_pinned() && instr->as_Phi() == NULL) || instr->operand()->is_valid()) {
385 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
386 } else {
387 assert(instr->subst() == instr, "shouldn't have missed substitution");
388 instr->visit(this);
389 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
390 }
391 }
392
393
394 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
395 assert(state != NULL, "state must be defined");
396
397 #ifndef PRODUCT
398 state->verify();
399 #endif
400
401 ValueStack* s = state;
402 for_each_state(s) {
403 if (s->kind() == ValueStack::EmptyExceptionState) {
404 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty");
405 continue;
406 }
407
408 int index;
409 Value value;
410 for_each_stack_value(s, index, value) {
411 assert(value->subst() == value, "missed substitution");
412 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
413 walk(value);
414 assert(value->operand()->is_valid(), "must be evaluated now");
415 }
416 }
417
418 int bci = s->bci();
419 IRScope* scope = s->scope();
420 ciMethod* method = scope->method();
421
422 MethodLivenessResult liveness = method->liveness_at_bci(bci);
423 if (bci == SynchronizationEntryBCI) {
424 if (x->as_ExceptionObject() || x->as_Throw()) {
425 // all locals are dead on exit from the synthetic unlocker
426 liveness.clear();
427 } else {
428 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke");
429 }
430 }
431 if (!liveness.is_valid()) {
432 // Degenerate or breakpointed method.
433 bailout("Degenerate or breakpointed method");
434 } else {
435 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
436 for_each_local_value(s, index, value) {
437 assert(value->subst() == value, "missed substition");
438 if (liveness.at(index) && !value->type()->is_illegal()) {
439 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
440 walk(value);
441 assert(value->operand()->is_valid(), "must be evaluated now");
442 }
443 } else {
444 // NULL out this local so that linear scan can assume that all non-NULL values are live.
445 s->invalidate_local(index);
446 }
447 }
448 }
449 }
450
451 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException));
452 }
453
454
455 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
456 return state_for(x, x->exception_state());
457 }
458
459
460 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) {
461 /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if tiered compilation
462 * is active and the class hasn't yet been resolved we need to emit a patch that resolves
463 * the class. */
464 if ((!CompilerConfig::is_c1_only_no_jvmci() && need_resolve) || !obj->is_loaded() || PatchALot) {
465 assert(info != NULL, "info must be set if class is not loaded");
466 __ klass2reg_patch(NULL, r, info);
467 } else {
468 // no patching needed
469 __ metadata2reg(obj->constant_encoding(), r);
470 }
471 }
472
473
474 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
475 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
476 CodeStub* stub = new RangeCheckStub(range_check_info, index, array);
477 if (index->is_constant()) {
478 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
479 index->as_jint(), null_check_info);
480 __ branch(lir_cond_belowEqual, stub); // forward branch
481 } else {
482 cmp_reg_mem(lir_cond_aboveEqual, index, array,
483 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
484 __ branch(lir_cond_aboveEqual, stub); // forward branch
485 }
486 }
487
488
489 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
490 CodeStub* stub = new RangeCheckStub(info, index);
491 if (index->is_constant()) {
492 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
493 __ branch(lir_cond_belowEqual, stub); // forward branch
494 } else {
495 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
496 java_nio_Buffer::limit_offset(), T_INT, info);
497 __ branch(lir_cond_aboveEqual, stub); // forward branch
498 }
499 __ move(index, result);
500 }
501
502
503
504 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp_op, CodeEmitInfo* info) {
505 LIR_Opr result_op = result;
506 LIR_Opr left_op = left;
507 LIR_Opr right_op = right;
508
509 if (TwoOperandLIRForm && left_op != result_op) {
510 assert(right_op != result_op, "malformed");
511 __ move(left_op, result_op);
512 left_op = result_op;
513 }
514
515 switch(code) {
516 case Bytecodes::_dadd:
517 case Bytecodes::_fadd:
518 case Bytecodes::_ladd:
519 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
520 case Bytecodes::_fmul:
521 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
522
523 case Bytecodes::_dmul: __ mul(left_op, right_op, result_op, tmp_op); break;
524
525 case Bytecodes::_imul:
526 {
527 bool did_strength_reduce = false;
528
529 if (right->is_constant()) {
530 jint c = right->as_jint();
531 if (c > 0 && is_power_of_2(c)) {
532 // do not need tmp here
533 __ shift_left(left_op, exact_log2(c), result_op);
534 did_strength_reduce = true;
535 } else {
536 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
537 }
538 }
539 // we couldn't strength reduce so just emit the multiply
540 if (!did_strength_reduce) {
541 __ mul(left_op, right_op, result_op);
542 }
543 }
544 break;
545
546 case Bytecodes::_dsub:
547 case Bytecodes::_fsub:
548 case Bytecodes::_lsub:
549 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
550
551 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
552 // ldiv and lrem are implemented with a direct runtime call
553
554 case Bytecodes::_ddiv: __ div(left_op, right_op, result_op, tmp_op); break;
555
556 case Bytecodes::_drem:
557 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
558
559 default: ShouldNotReachHere();
560 }
561 }
562
563
564 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
565 arithmetic_op(code, result, left, right, tmp);
566 }
567
568
569 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
570 arithmetic_op(code, result, left, right, LIR_OprFact::illegalOpr, info);
571 }
572
573
574 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
575 arithmetic_op(code, result, left, right, tmp);
576 }
577
578
579 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
580
581 if (TwoOperandLIRForm && value != result_op
582 // Only 32bit right shifts require two operand form on S390.
583 S390_ONLY(&& (code == Bytecodes::_ishr || code == Bytecodes::_iushr))) {
584 assert(count != result_op, "malformed");
585 __ move(value, result_op);
586 value = result_op;
587 }
588
589 assert(count->is_constant() || count->is_register(), "must be");
590 switch(code) {
591 case Bytecodes::_ishl:
592 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
593 case Bytecodes::_ishr:
594 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
595 case Bytecodes::_iushr:
596 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
597 default: ShouldNotReachHere();
598 }
599 }
600
601
602 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
603 if (TwoOperandLIRForm && left_op != result_op) {
604 assert(right_op != result_op, "malformed");
605 __ move(left_op, result_op);
606 left_op = result_op;
607 }
608
609 switch(code) {
610 case Bytecodes::_iand:
611 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
612
613 case Bytecodes::_ior:
614 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
615
616 case Bytecodes::_ixor:
617 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
618
619 default: ShouldNotReachHere();
620 }
621 }
622
623
624 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) {
625 if (!GenerateSynchronizationCode) return;
626 // for slow path, use debug info for state after successful locking
627 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
628 __ load_stack_address_monitor(monitor_no, lock);
629 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
630 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
631 }
632
633
634 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) {
635 if (!GenerateSynchronizationCode) return;
636 // setup registers
637 LIR_Opr hdr = lock;
638 lock = new_hdr;
639 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no);
640 __ load_stack_address_monitor(monitor_no, lock);
641 __ unlock_object(hdr, object, lock, scratch, slow_path);
642 }
643
644 #ifndef PRODUCT
645 void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) {
646 if (PrintNotLoaded && !new_instance->klass()->is_loaded()) {
647 tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci());
648 } else if (PrintNotLoaded && (!CompilerConfig::is_c1_only_no_jvmci() && new_instance->is_unresolved())) {
649 tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci());
650 }
651 }
652 #endif
653
654 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) {
655 klass2reg_with_patching(klass_reg, klass, info, is_unresolved);
656 // If klass is not loaded we do not know if the klass has finalizers:
657 if (UseFastNewInstance && klass->is_loaded()
658 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
659
660 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
661
662 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
663
664 assert(klass->is_loaded(), "must be loaded");
665 // allocate space for instance
666 assert(klass->size_helper() > 0, "illegal instance size");
667 const int instance_size = align_object_size(klass->size_helper());
668 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
669 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
670 } else {
671 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
672 __ branch(lir_cond_always, slow_path);
673 __ branch_destination(slow_path->continuation());
674 }
675 }
676
677
678 static bool is_constant_zero(Instruction* inst) {
679 IntConstant* c = inst->type()->as_IntConstant();
680 if (c) {
681 return (c->value() == 0);
682 }
683 return false;
684 }
685
686
687 static bool positive_constant(Instruction* inst) {
688 IntConstant* c = inst->type()->as_IntConstant();
689 if (c) {
690 return (c->value() >= 0);
691 }
692 return false;
693 }
694
695
696 static ciArrayKlass* as_array_klass(ciType* type) {
697 if (type != NULL && type->is_array_klass() && type->is_loaded()) {
698 return (ciArrayKlass*)type;
699 } else {
700 return NULL;
701 }
702 }
703
704 static ciType* phi_declared_type(Phi* phi) {
705 ciType* t = phi->operand_at(0)->declared_type();
706 if (t == NULL) {
707 return NULL;
708 }
709 for(int i = 1; i < phi->operand_count(); i++) {
710 if (t != phi->operand_at(i)->declared_type()) {
711 return NULL;
712 }
713 }
714 return t;
715 }
716
717 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
718 Instruction* src = x->argument_at(0);
719 Instruction* src_pos = x->argument_at(1);
720 Instruction* dst = x->argument_at(2);
721 Instruction* dst_pos = x->argument_at(3);
722 Instruction* length = x->argument_at(4);
723
724 // first try to identify the likely type of the arrays involved
725 ciArrayKlass* expected_type = NULL;
726 bool is_exact = false, src_objarray = false, dst_objarray = false;
727 {
728 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
729 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
730 Phi* phi;
731 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) {
732 src_declared_type = as_array_klass(phi_declared_type(phi));
733 }
734 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
735 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
736 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) {
737 dst_declared_type = as_array_klass(phi_declared_type(phi));
738 }
739
740 if (src_exact_type != NULL && src_exact_type == dst_exact_type) {
741 // the types exactly match so the type is fully known
742 is_exact = true;
743 expected_type = src_exact_type;
744 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) {
745 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
746 ciArrayKlass* src_type = NULL;
747 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) {
748 src_type = (ciArrayKlass*) src_exact_type;
749 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) {
750 src_type = (ciArrayKlass*) src_declared_type;
751 }
752 if (src_type != NULL) {
753 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
754 is_exact = true;
755 expected_type = dst_type;
756 }
757 }
758 }
759 // at least pass along a good guess
760 if (expected_type == NULL) expected_type = dst_exact_type;
761 if (expected_type == NULL) expected_type = src_declared_type;
762 if (expected_type == NULL) expected_type = dst_declared_type;
763
764 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass());
765 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass());
766 }
767
768 // if a probable array type has been identified, figure out if any
769 // of the required checks for a fast case can be elided.
770 int flags = LIR_OpArrayCopy::all_flags;
771
772 if (!src_objarray)
773 flags &= ~LIR_OpArrayCopy::src_objarray;
774 if (!dst_objarray)
775 flags &= ~LIR_OpArrayCopy::dst_objarray;
776
777 if (!x->arg_needs_null_check(0))
778 flags &= ~LIR_OpArrayCopy::src_null_check;
779 if (!x->arg_needs_null_check(2))
780 flags &= ~LIR_OpArrayCopy::dst_null_check;
781
782
783 if (expected_type != NULL) {
784 Value length_limit = NULL;
785
786 IfOp* ifop = length->as_IfOp();
787 if (ifop != NULL) {
788 // look for expressions like min(v, a.length) which ends up as
789 // x > y ? y : x or x >= y ? y : x
790 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) &&
791 ifop->x() == ifop->fval() &&
792 ifop->y() == ifop->tval()) {
793 length_limit = ifop->y();
794 }
795 }
796
797 // try to skip null checks and range checks
798 NewArray* src_array = src->as_NewArray();
799 if (src_array != NULL) {
800 flags &= ~LIR_OpArrayCopy::src_null_check;
801 if (length_limit != NULL &&
802 src_array->length() == length_limit &&
803 is_constant_zero(src_pos)) {
804 flags &= ~LIR_OpArrayCopy::src_range_check;
805 }
806 }
807
808 NewArray* dst_array = dst->as_NewArray();
809 if (dst_array != NULL) {
810 flags &= ~LIR_OpArrayCopy::dst_null_check;
811 if (length_limit != NULL &&
812 dst_array->length() == length_limit &&
813 is_constant_zero(dst_pos)) {
814 flags &= ~LIR_OpArrayCopy::dst_range_check;
815 }
816 }
817
818 // check from incoming constant values
819 if (positive_constant(src_pos))
820 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
821 if (positive_constant(dst_pos))
822 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
823 if (positive_constant(length))
824 flags &= ~LIR_OpArrayCopy::length_positive_check;
825
826 // see if the range check can be elided, which might also imply
827 // that src or dst is non-null.
828 ArrayLength* al = length->as_ArrayLength();
829 if (al != NULL) {
830 if (al->array() == src) {
831 // it's the length of the source array
832 flags &= ~LIR_OpArrayCopy::length_positive_check;
833 flags &= ~LIR_OpArrayCopy::src_null_check;
834 if (is_constant_zero(src_pos))
835 flags &= ~LIR_OpArrayCopy::src_range_check;
836 }
837 if (al->array() == dst) {
838 // it's the length of the destination array
839 flags &= ~LIR_OpArrayCopy::length_positive_check;
840 flags &= ~LIR_OpArrayCopy::dst_null_check;
841 if (is_constant_zero(dst_pos))
842 flags &= ~LIR_OpArrayCopy::dst_range_check;
843 }
844 }
845 if (is_exact) {
846 flags &= ~LIR_OpArrayCopy::type_check;
847 }
848 }
849
850 IntConstant* src_int = src_pos->type()->as_IntConstant();
851 IntConstant* dst_int = dst_pos->type()->as_IntConstant();
852 if (src_int && dst_int) {
853 int s_offs = src_int->value();
854 int d_offs = dst_int->value();
855 if (src_int->value() >= dst_int->value()) {
856 flags &= ~LIR_OpArrayCopy::overlapping;
857 }
858 if (expected_type != NULL) {
859 BasicType t = expected_type->element_type()->basic_type();
860 int element_size = type2aelembytes(t);
861 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) &&
862 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) {
863 flags &= ~LIR_OpArrayCopy::unaligned;
864 }
865 }
866 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) {
867 // src and dest positions are the same, or dst is zero so assume
868 // nonoverlapping copy.
869 flags &= ~LIR_OpArrayCopy::overlapping;
870 }
871
872 if (src == dst) {
873 // moving within a single array so no type checks are needed
874 if (flags & LIR_OpArrayCopy::type_check) {
875 flags &= ~LIR_OpArrayCopy::type_check;
876 }
877 }
878 *flagsp = flags;
879 *expected_typep = (ciArrayKlass*)expected_type;
880 }
881
882
883 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
884 assert(opr->is_register(), "why spill if item is not register?");
885
886 if (strict_fp_requires_explicit_rounding) {
887 #ifdef IA32
888 if (UseSSE < 1 && opr->is_single_fpu()) {
889 LIR_Opr result = new_register(T_FLOAT);
890 set_vreg_flag(result, must_start_in_memory);
891 assert(opr->is_register(), "only a register can be spilled");
892 assert(opr->value_type()->is_float(), "rounding only for floats available");
893 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
894 return result;
895 }
896 #else
897 Unimplemented();
898 #endif // IA32
899 }
900 return opr;
901 }
902
903
904 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
905 assert(type2size[t] == type2size[value->type()],
906 "size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()));
907 if (!value->is_register()) {
908 // force into a register
909 LIR_Opr r = new_register(value->type());
910 __ move(value, r);
911 value = r;
912 }
913
914 // create a spill location
915 LIR_Opr tmp = new_register(t);
916 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
917
918 // move from register to spill
919 __ move(value, tmp);
920 return tmp;
921 }
922
923 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
924 if (if_instr->should_profile()) {
925 ciMethod* method = if_instr->profiled_method();
926 assert(method != NULL, "method should be set if branch is profiled");
927 ciMethodData* md = method->method_data_or_null();
928 assert(md != NULL, "Sanity");
929 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
930 assert(data != NULL, "must have profiling data");
931 assert(data->is_BranchData(), "need BranchData for two-way branches");
932 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
933 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
934 if (if_instr->is_swapped()) {
935 int t = taken_count_offset;
936 taken_count_offset = not_taken_count_offset;
937 not_taken_count_offset = t;
938 }
939
940 LIR_Opr md_reg = new_register(T_METADATA);
941 __ metadata2reg(md->constant_encoding(), md_reg);
942
943 LIR_Opr data_offset_reg = new_pointer_register();
944 __ cmove(lir_cond(cond),
945 LIR_OprFact::intptrConst(taken_count_offset),
946 LIR_OprFact::intptrConst(not_taken_count_offset),
947 data_offset_reg, as_BasicType(if_instr->x()->type()));
948
949 // MDO cells are intptr_t, so the data_reg width is arch-dependent.
950 LIR_Opr data_reg = new_pointer_register();
951 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
952 __ move(data_addr, data_reg);
953 // Use leal instead of add to avoid destroying condition codes on x86
954 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
955 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
956 __ move(data_reg, data_addr);
957 }
958 }
959
960 // Phi technique:
961 // This is about passing live values from one basic block to the other.
962 // In code generated with Java it is rather rare that more than one
963 // value is on the stack from one basic block to the other.
964 // We optimize our technique for efficient passing of one value
965 // (of type long, int, double..) but it can be extended.
966 // When entering or leaving a basic block, all registers and all spill
967 // slots are release and empty. We use the released registers
968 // and spill slots to pass the live values from one block
969 // to the other. The topmost value, i.e., the value on TOS of expression
970 // stack is passed in registers. All other values are stored in spilling
971 // area. Every Phi has an index which designates its spill slot
972 // At exit of a basic block, we fill the register(s) and spill slots.
973 // At entry of a basic block, the block_prolog sets up the content of phi nodes
974 // and locks necessary registers and spilling slots.
975
976
977 // move current value to referenced phi function
978 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
979 Phi* phi = sux_val->as_Phi();
980 // cur_val can be null without phi being null in conjunction with inlining
981 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) {
982 if (phi->is_local()) {
983 for (int i = 0; i < phi->operand_count(); i++) {
984 Value op = phi->operand_at(i);
985 if (op != NULL && op->type()->is_illegal()) {
986 bailout("illegal phi operand");
987 }
988 }
989 }
990 Phi* cur_phi = cur_val->as_Phi();
991 if (cur_phi != NULL && cur_phi->is_illegal()) {
992 // Phi and local would need to get invalidated
993 // (which is unexpected for Linear Scan).
994 // But this case is very rare so we simply bail out.
995 bailout("propagation of illegal phi");
996 return;
997 }
998 LIR_Opr operand = cur_val->operand();
999 if (operand->is_illegal()) {
1000 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
1001 "these can be produced lazily");
1002 operand = operand_for_instruction(cur_val);
1003 }
1004 resolver->move(operand, operand_for_instruction(phi));
1005 }
1006 }
1007
1008
1009 // Moves all stack values into their PHI position
1010 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
1011 BlockBegin* bb = block();
1012 if (bb->number_of_sux() == 1) {
1013 BlockBegin* sux = bb->sux_at(0);
1014 assert(sux->number_of_preds() > 0, "invalid CFG");
1015
1016 // a block with only one predecessor never has phi functions
1017 if (sux->number_of_preds() > 1) {
1018 PhiResolver resolver(this);
1019
1020 ValueStack* sux_state = sux->state();
1021 Value sux_value;
1022 int index;
1023
1024 assert(cur_state->scope() == sux_state->scope(), "not matching");
1025 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching");
1026 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching");
1027
1028 for_each_stack_value(sux_state, index, sux_value) {
1029 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
1030 }
1031
1032 for_each_local_value(sux_state, index, sux_value) {
1033 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
1034 }
1035
1036 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
1037 }
1038 }
1039 }
1040
1041
1042 LIR_Opr LIRGenerator::new_register(BasicType type) {
1043 int vreg_num = _virtual_register_number;
1044 // Add a little fudge factor for the bailout since the bailout is only checked periodically. This allows us to hand out
1045 // a few extra registers before we really run out which helps to avoid to trip over assertions.
1046 if (vreg_num + 20 >= LIR_OprDesc::vreg_max) {
1047 bailout("out of virtual registers in LIR generator");
1048 if (vreg_num + 2 >= LIR_OprDesc::vreg_max) {
1049 // Wrap it around and continue until bailout really happens to avoid hitting assertions.
1050 _virtual_register_number = LIR_OprDesc::vreg_base;
1051 vreg_num = LIR_OprDesc::vreg_base;
1052 }
1053 }
1054 _virtual_register_number += 1;
1055 LIR_Opr vreg = LIR_OprFact::virtual_register(vreg_num, type);
1056 assert(vreg != LIR_OprFact::illegal(), "ran out of virtual registers");
1057 return vreg;
1058 }
1059
1060
1061 // Try to lock using register in hint
1062 LIR_Opr LIRGenerator::rlock(Value instr) {
1063 return new_register(instr->type());
1064 }
1065
1066
1067 // does an rlock and sets result
1068 LIR_Opr LIRGenerator::rlock_result(Value x) {
1069 LIR_Opr reg = rlock(x);
1070 set_result(x, reg);
1071 return reg;
1072 }
1073
1074
1075 // does an rlock and sets result
1076 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
1077 LIR_Opr reg;
1078 switch (type) {
1079 case T_BYTE:
1080 case T_BOOLEAN:
1081 reg = rlock_byte(type);
1082 break;
1083 default:
1084 reg = rlock(x);
1085 break;
1086 }
1087
1088 set_result(x, reg);
1089 return reg;
1090 }
1091
1092
1093 //---------------------------------------------------------------------
1094 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1095 ObjectType* oc = value->type()->as_ObjectType();
1096 if (oc) {
1097 return oc->constant_value();
1098 }
1099 return NULL;
1100 }
1101
1102
1103 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1104 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1105 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1106
1107 // no moves are created for phi functions at the begin of exception
1108 // handlers, so assign operands manually here
1109 for_each_phi_fun(block(), phi,
1110 if (!phi->is_illegal()) { operand_for_instruction(phi); });
1111
1112 LIR_Opr thread_reg = getThreadPointer();
1113 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1114 exceptionOopOpr());
1115 __ move_wide(LIR_OprFact::oopConst(NULL),
1116 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1117 __ move_wide(LIR_OprFact::oopConst(NULL),
1118 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1119
1120 LIR_Opr result = new_register(T_OBJECT);
1121 __ move(exceptionOopOpr(), result);
1122 set_result(x, result);
1123 }
1124
1125
1126 //----------------------------------------------------------------------
1127 //----------------------------------------------------------------------
1128 //----------------------------------------------------------------------
1129 //----------------------------------------------------------------------
1130 // visitor functions
1131 //----------------------------------------------------------------------
1132 //----------------------------------------------------------------------
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135
1136 void LIRGenerator::do_Phi(Phi* x) {
1137 // phi functions are never visited directly
1138 ShouldNotReachHere();
1139 }
1140
1141
1142 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
1143 void LIRGenerator::do_Constant(Constant* x) {
1144 if (x->state_before() != NULL) {
1145 // Any constant with a ValueStack requires patching so emit the patch here
1146 LIR_Opr reg = rlock_result(x);
1147 CodeEmitInfo* info = state_for(x, x->state_before());
1148 __ oop2reg_patch(NULL, reg, info);
1149 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
1150 if (!x->is_pinned()) {
1151 // unpinned constants are handled specially so that they can be
1152 // put into registers when they are used multiple times within a
1153 // block. After the block completes their operand will be
1154 // cleared so that other blocks can't refer to that register.
1155 set_result(x, load_constant(x));
1156 } else {
1157 LIR_Opr res = x->operand();
1158 if (!res->is_valid()) {
1159 res = LIR_OprFact::value_type(x->type());
1160 }
1161 if (res->is_constant()) {
1162 LIR_Opr reg = rlock_result(x);
1163 __ move(res, reg);
1164 } else {
1165 set_result(x, res);
1166 }
1167 }
1168 } else {
1169 set_result(x, LIR_OprFact::value_type(x->type()));
1170 }
1171 }
1172
1173
1174 void LIRGenerator::do_Local(Local* x) {
1175 // operand_for_instruction has the side effect of setting the result
1176 // so there's no need to do it here.
1177 operand_for_instruction(x);
1178 }
1179
1180
1181 void LIRGenerator::do_Return(Return* x) {
1182 if (compilation()->env()->dtrace_method_probes()) {
1183 BasicTypeList signature;
1184 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
1185 signature.append(T_METADATA); // Method*
1186 LIR_OprList* args = new LIR_OprList();
1187 args->append(getThreadPointer());
1188 LIR_Opr meth = new_register(T_METADATA);
1189 __ metadata2reg(method()->constant_encoding(), meth);
1190 args->append(meth);
1191 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
1192 }
1193
1194 if (x->type()->is_void()) {
1195 __ return_op(LIR_OprFact::illegalOpr);
1196 } else {
1197 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
1198 LIRItem result(x->result(), this);
1199
1200 result.load_item_force(reg);
1201 __ return_op(result.result());
1202 }
1203 set_no_result(x);
1204 }
1205
1206 // Examble: ref.get()
1207 // Combination of LoadField and g1 pre-write barrier
1208 void LIRGenerator::do_Reference_get(Intrinsic* x) {
1209
1210 const int referent_offset = java_lang_ref_Reference::referent_offset();
1211
1212 assert(x->number_of_arguments() == 1, "wrong type");
1213
1214 LIRItem reference(x->argument_at(0), this);
1215 reference.load_item();
1216
1217 // need to perform the null check on the reference objecy
1218 CodeEmitInfo* info = NULL;
1219 if (x->needs_null_check()) {
1220 info = state_for(x);
1221 }
1222
1223 LIR_Opr result = rlock_result(x, T_OBJECT);
1224 access_load_at(IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT,
1225 reference, LIR_OprFact::intConst(referent_offset), result);
1226 }
1227
1228 // Example: clazz.isInstance(object)
1229 void LIRGenerator::do_isInstance(Intrinsic* x) {
1230 assert(x->number_of_arguments() == 2, "wrong type");
1231
1232 // TODO could try to substitute this node with an equivalent InstanceOf
1233 // if clazz is known to be a constant Class. This will pick up newly found
1234 // constants after HIR construction. I'll leave this to a future change.
1235
1236 // as a first cut, make a simple leaf call to runtime to stay platform independent.
1237 // could follow the aastore example in a future change.
1238
1239 LIRItem clazz(x->argument_at(0), this);
1240 LIRItem object(x->argument_at(1), this);
1241 clazz.load_item();
1242 object.load_item();
1243 LIR_Opr result = rlock_result(x);
1244
1245 // need to perform null check on clazz
1246 if (x->needs_null_check()) {
1247 CodeEmitInfo* info = state_for(x);
1248 __ null_check(clazz.result(), info);
1249 }
1250
1251 LIR_Opr call_result = call_runtime(clazz.value(), object.value(),
1252 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of),
1253 x->type(),
1254 NULL); // NULL CodeEmitInfo results in a leaf call
1255 __ move(call_result, result);
1256 }
1257
1258 // Example: object.getClass ()
1259 void LIRGenerator::do_getClass(Intrinsic* x) {
1260 assert(x->number_of_arguments() == 1, "wrong type");
1261
1262 LIRItem rcvr(x->argument_at(0), this);
1263 rcvr.load_item();
1264 LIR_Opr temp = new_register(T_METADATA);
1265 LIR_Opr result = rlock_result(x);
1266
1267 // need to perform the null check on the rcvr
1268 CodeEmitInfo* info = NULL;
1269 if (x->needs_null_check()) {
1270 info = state_for(x);
1271 }
1272
1273 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
1274 // meaning of these two is mixed up (see JDK-8026837).
1275 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
1276 __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_ADDRESS), temp);
1277 // mirror = ((OopHandle)mirror)->resolve();
1278 access_load(IN_NATIVE, T_OBJECT,
1279 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), result);
1280 }
1281
1282 // java.lang.Class::isPrimitive()
1283 void LIRGenerator::do_isPrimitive(Intrinsic* x) {
1284 assert(x->number_of_arguments() == 1, "wrong type");
1285
1286 LIRItem rcvr(x->argument_at(0), this);
1287 rcvr.load_item();
1288 LIR_Opr temp = new_register(T_METADATA);
1289 LIR_Opr result = rlock_result(x);
1290
1291 CodeEmitInfo* info = NULL;
1292 if (x->needs_null_check()) {
1293 info = state_for(x);
1294 }
1295
1296 __ move(new LIR_Address(rcvr.result(), java_lang_Class::klass_offset(), T_ADDRESS), temp, info);
1297 __ cmp(lir_cond_notEqual, temp, LIR_OprFact::metadataConst(0));
1298 __ cmove(lir_cond_notEqual, LIR_OprFact::intConst(0), LIR_OprFact::intConst(1), result, T_BOOLEAN);
1299 }
1300
1301 // Example: Foo.class.getModifiers()
1302 void LIRGenerator::do_getModifiers(Intrinsic* x) {
1303 assert(x->number_of_arguments() == 1, "wrong type");
1304
1305 LIRItem receiver(x->argument_at(0), this);
1306 receiver.load_item();
1307 LIR_Opr result = rlock_result(x);
1308
1309 CodeEmitInfo* info = NULL;
1310 if (x->needs_null_check()) {
1311 info = state_for(x);
1312 }
1313
1314 // While reading off the universal constant mirror is less efficient than doing
1315 // another branch and returning the constant answer, this branchless code runs into
1316 // much less risk of confusion for C1 register allocator. The choice of the universe
1317 // object here is correct as long as it returns the same modifiers we would expect
1318 // from the primitive class itself. See spec for Class.getModifiers that provides
1319 // the typed array klasses with similar modifiers as their component types.
1320
1321 Klass* univ_klass_obj = Universe::byteArrayKlassObj();
1322 assert(univ_klass_obj->modifier_flags() == (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC), "Sanity");
1323 LIR_Opr prim_klass = LIR_OprFact::metadataConst(univ_klass_obj);
1324
1325 LIR_Opr recv_klass = new_register(T_METADATA);
1326 __ move(new LIR_Address(receiver.result(), java_lang_Class::klass_offset(), T_ADDRESS), recv_klass, info);
1327
1328 // Check if this is a Java mirror of primitive type, and select the appropriate klass.
1329 LIR_Opr klass = new_register(T_METADATA);
1330 __ cmp(lir_cond_equal, recv_klass, LIR_OprFact::metadataConst(0));
1331 __ cmove(lir_cond_equal, prim_klass, recv_klass, klass, T_ADDRESS);
1332
1333 // Get the answer.
1334 __ move(new LIR_Address(klass, in_bytes(Klass::modifier_flags_offset()), T_INT), result);
1335 }
1336
1337 // Example: Thread.currentThread()
1338 void LIRGenerator::do_currentThread(Intrinsic* x) {
1339 assert(x->number_of_arguments() == 0, "wrong type");
1340 LIR_Opr temp = new_register(T_ADDRESS);
1341 LIR_Opr reg = rlock_result(x);
1342 __ move(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_ADDRESS), temp);
1343 // threadObj = ((OopHandle)_threadObj)->resolve();
1344 access_load(IN_NATIVE, T_OBJECT,
1345 LIR_OprFact::address(new LIR_Address(temp, T_OBJECT)), reg);
1346 }
1347
1348 void LIRGenerator::do_getObjectSize(Intrinsic* x) {
1349 assert(x->number_of_arguments() == 3, "wrong type");
1350 LIR_Opr result_reg = rlock_result(x);
1351
1352 LIRItem value(x->argument_at(2), this);
1353 value.load_item();
1354
1355 LIR_Opr klass = new_register(T_METADATA);
1356 __ move(new LIR_Address(value.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, NULL);
1357 LIR_Opr layout = new_register(T_INT);
1358 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
1359
1360 LabelObj* L_done = new LabelObj();
1361 LabelObj* L_array = new LabelObj();
1362
1363 __ cmp(lir_cond_lessEqual, layout, 0);
1364 __ branch(lir_cond_lessEqual, L_array->label());
1365
1366 // Instance case: the layout helper gives us instance size almost directly,
1367 // but we need to mask out the _lh_instance_slow_path_bit.
1368 __ convert(Bytecodes::_i2l, layout, result_reg);
1369
1370 assert((int) Klass::_lh_instance_slow_path_bit < BytesPerLong, "clear bit");
1371 jlong mask = ~(jlong) right_n_bits(LogBytesPerLong);
1372 __ logical_and(result_reg, LIR_OprFact::longConst(mask), result_reg);
1373
1374 __ branch(lir_cond_always, L_done->label());
1375
1376 // Array case: size is round(header + element_size*arraylength).
1377 // Since arraylength is different for every array instance, we have to
1378 // compute the whole thing at runtime.
1379
1380 __ branch_destination(L_array->label());
1381
1382 int round_mask = MinObjAlignmentInBytes - 1;
1383
1384 // Figure out header sizes first.
1385 LIR_Opr hss = LIR_OprFact::intConst(Klass::_lh_header_size_shift);
1386 LIR_Opr hsm = LIR_OprFact::intConst(Klass::_lh_header_size_mask);
1387
1388 LIR_Opr header_size = new_register(T_INT);
1389 __ move(layout, header_size);
1390 LIR_Opr tmp = new_register(T_INT);
1391 __ unsigned_shift_right(header_size, hss, header_size, tmp);
1392 __ logical_and(header_size, hsm, header_size);
1393 __ add(header_size, LIR_OprFact::intConst(round_mask), header_size);
1394
1395 // Figure out the array length in bytes
1396 assert(Klass::_lh_log2_element_size_shift == 0, "use shift in place");
1397 LIR_Opr l2esm = LIR_OprFact::intConst(Klass::_lh_log2_element_size_mask);
1398 __ logical_and(layout, l2esm, layout);
1399
1400 LIR_Opr length_int = new_register(T_INT);
1401 __ move(new LIR_Address(value.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), length_int);
1402
1403 #ifdef _LP64
1404 LIR_Opr length = new_register(T_LONG);
1405 __ convert(Bytecodes::_i2l, length_int, length);
1406 #endif
1407
1408 // Shift-left awkwardness. Normally it is just:
1409 // __ shift_left(length, layout, length);
1410 // But C1 cannot perform shift_left with non-constant count, so we end up
1411 // doing the per-bit loop dance here. x86_32 also does not know how to shift
1412 // longs, so we have to act on ints.
1413 LabelObj* L_shift_loop = new LabelObj();
1414 LabelObj* L_shift_exit = new LabelObj();
1415
1416 __ branch_destination(L_shift_loop->label());
1417 __ cmp(lir_cond_equal, layout, 0);
1418 __ branch(lir_cond_equal, L_shift_exit->label());
1419
1420 #ifdef _LP64
1421 __ shift_left(length, 1, length);
1422 #else
1423 __ shift_left(length_int, 1, length_int);
1424 #endif
1425
1426 __ sub(layout, LIR_OprFact::intConst(1), layout);
1427
1428 __ branch(lir_cond_always, L_shift_loop->label());
1429 __ branch_destination(L_shift_exit->label());
1430
1431 // Mix all up, round, and push to the result.
1432 #ifdef _LP64
1433 LIR_Opr header_size_long = new_register(T_LONG);
1434 __ convert(Bytecodes::_i2l, header_size, header_size_long);
1435 __ add(length, header_size_long, length);
1436 if (round_mask != 0) {
1437 __ logical_and(length, LIR_OprFact::longConst(~round_mask), length);
1438 }
1439 __ move(length, result_reg);
1440 #else
1441 __ add(length_int, header_size, length_int);
1442 if (round_mask != 0) {
1443 __ logical_and(length_int, LIR_OprFact::intConst(~round_mask), length_int);
1444 }
1445 __ convert(Bytecodes::_i2l, length_int, result_reg);
1446 #endif
1447
1448 __ branch_destination(L_done->label());
1449 }
1450
1451 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
1452 assert(x->number_of_arguments() == 1, "wrong type");
1453 LIRItem receiver(x->argument_at(0), this);
1454
1455 receiver.load_item();
1456 BasicTypeList signature;
1457 signature.append(T_OBJECT); // receiver
1458 LIR_OprList* args = new LIR_OprList();
1459 args->append(receiver.result());
1460 CodeEmitInfo* info = state_for(x, x->state());
1461 call_runtime(&signature, args,
1462 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
1463 voidType, info);
1464
1465 set_no_result(x);
1466 }
1467
1468
1469 //------------------------local access--------------------------------------
1470
1471 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
1472 if (x->operand()->is_illegal()) {
1473 Constant* c = x->as_Constant();
1474 if (c != NULL) {
1475 x->set_operand(LIR_OprFact::value_type(c->type()));
1476 } else {
1477 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
1478 // allocate a virtual register for this local or phi
1479 x->set_operand(rlock(x));
1480 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
1481 }
1482 }
1483 return x->operand();
1484 }
1485
1486
1487 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
1488 if (opr->is_virtual()) {
1489 return instruction_for_vreg(opr->vreg_number());
1490 }
1491 return NULL;
1492 }
1493
1494
1495 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
1496 if (reg_num < _instruction_for_operand.length()) {
1497 return _instruction_for_operand.at(reg_num);
1498 }
1499 return NULL;
1500 }
1501
1502
1503 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
1504 if (_vreg_flags.size_in_bits() == 0) {
1505 BitMap2D temp(100, num_vreg_flags);
1506 _vreg_flags = temp;
1507 }
1508 _vreg_flags.at_put_grow(vreg_num, f, true);
1509 }
1510
1511 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
1512 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
1513 return false;
1514 }
1515 return _vreg_flags.at(vreg_num, f);
1516 }
1517
1518
1519 // Block local constant handling. This code is useful for keeping
1520 // unpinned constants and constants which aren't exposed in the IR in
1521 // registers. Unpinned Constant instructions have their operands
1522 // cleared when the block is finished so that other blocks can't end
1523 // up referring to their registers.
1524
1525 LIR_Opr LIRGenerator::load_constant(Constant* x) {
1526 assert(!x->is_pinned(), "only for unpinned constants");
1527 _unpinned_constants.append(x);
1528 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
1529 }
1530
1531
1532 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
1533 BasicType t = c->type();
1534 for (int i = 0; i < _constants.length(); i++) {
1535 LIR_Const* other = _constants.at(i);
1536 if (t == other->type()) {
1537 switch (t) {
1538 case T_INT:
1539 case T_FLOAT:
1540 if (c->as_jint_bits() != other->as_jint_bits()) continue;
1541 break;
1542 case T_LONG:
1543 case T_DOUBLE:
1544 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue;
1545 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue;
1546 break;
1547 case T_OBJECT:
1548 if (c->as_jobject() != other->as_jobject()) continue;
1549 break;
1550 default:
1551 break;
1552 }
1553 return _reg_for_constants.at(i);
1554 }
1555 }
1556
1557 LIR_Opr result = new_register(t);
1558 __ move((LIR_Opr)c, result);
1559 _constants.append(c);
1560 _reg_for_constants.append(result);
1561 return result;
1562 }
1563
1564 //------------------------field access--------------------------------------
1565
1566 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
1567 assert(x->number_of_arguments() == 4, "wrong type");
1568 LIRItem obj (x->argument_at(0), this); // object
1569 LIRItem offset(x->argument_at(1), this); // offset of field
1570 LIRItem cmp (x->argument_at(2), this); // value to compare with field
1571 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
1572 assert(obj.type()->tag() == objectTag, "invalid type");
1573 assert(cmp.type()->tag() == type->tag(), "invalid type");
1574 assert(val.type()->tag() == type->tag(), "invalid type");
1575
1576 LIR_Opr result = access_atomic_cmpxchg_at(IN_HEAP, as_BasicType(type),
1577 obj, offset, cmp, val);
1578 set_result(x, result);
1579 }
1580
1581 // Comment copied form templateTable_i486.cpp
1582 // ----------------------------------------------------------------------------
1583 // Volatile variables demand their effects be made known to all CPU's in
1584 // order. Store buffers on most chips allow reads & writes to reorder; the
1585 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
1586 // memory barrier (i.e., it's not sufficient that the interpreter does not
1587 // reorder volatile references, the hardware also must not reorder them).
1588 //
1589 // According to the new Java Memory Model (JMM):
1590 // (1) All volatiles are serialized wrt to each other.
1591 // ALSO reads & writes act as aquire & release, so:
1592 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
1593 // the read float up to before the read. It's OK for non-volatile memory refs
1594 // that happen before the volatile read to float down below it.
1595 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
1596 // that happen BEFORE the write float down to after the write. It's OK for
1597 // non-volatile memory refs that happen after the volatile write to float up
1598 // before it.
1599 //
1600 // We only put in barriers around volatile refs (they are expensive), not
1601 // _between_ memory refs (that would require us to track the flavor of the
1602 // previous memory refs). Requirements (2) and (3) require some barriers
1603 // before volatile stores and after volatile loads. These nearly cover
1604 // requirement (1) but miss the volatile-store-volatile-load case. This final
1605 // case is placed after volatile-stores although it could just as well go
1606 // before volatile-loads.
1607
1608
1609 void LIRGenerator::do_StoreField(StoreField* x) {
1610 bool needs_patching = x->needs_patching();
1611 bool is_volatile = x->field()->is_volatile();
1612 BasicType field_type = x->field_type();
1613
1614 CodeEmitInfo* info = NULL;
1615 if (needs_patching) {
1616 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1617 info = state_for(x, x->state_before());
1618 } else if (x->needs_null_check()) {
1619 NullCheck* nc = x->explicit_null_check();
1620 if (nc == NULL) {
1621 info = state_for(x);
1622 } else {
1623 info = state_for(nc);
1624 }
1625 }
1626
1627 LIRItem object(x->obj(), this);
1628 LIRItem value(x->value(), this);
1629
1630 object.load_item();
1631
1632 if (is_volatile || needs_patching) {
1633 // load item if field is volatile (fewer special cases for volatiles)
1634 // load item if field not initialized
1635 // load item if field not constant
1636 // because of code patching we cannot inline constants
1637 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
1638 value.load_byte_item();
1639 } else {
1640 value.load_item();
1641 }
1642 } else {
1643 value.load_for_store(field_type);
1644 }
1645
1646 set_no_result(x);
1647
1648 #ifndef PRODUCT
1649 if (PrintNotLoaded && needs_patching) {
1650 tty->print_cr(" ###class not loaded at store_%s bci %d",
1651 x->is_static() ? "static" : "field", x->printable_bci());
1652 }
1653 #endif
1654
1655 if (x->needs_null_check() &&
1656 (needs_patching ||
1657 MacroAssembler::needs_explicit_null_check(x->offset()))) {
1658 // Emit an explicit null check because the offset is too large.
1659 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1660 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1661 __ null_check(object.result(), new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1662 }
1663
1664 DecoratorSet decorators = IN_HEAP;
1665 if (is_volatile) {
1666 decorators |= MO_SEQ_CST;
1667 }
1668 if (needs_patching) {
1669 decorators |= C1_NEEDS_PATCHING;
1670 }
1671
1672 access_store_at(decorators, field_type, object, LIR_OprFact::intConst(x->offset()),
1673 value.result(), info != NULL ? new CodeEmitInfo(info) : NULL, info);
1674 }
1675
1676 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
1677 assert(x->is_pinned(),"");
1678 bool needs_range_check = x->compute_needs_range_check();
1679 bool use_length = x->length() != NULL;
1680 bool obj_store = is_reference_type(x->elt_type());
1681 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
1682 !get_jobject_constant(x->value())->is_null_object() ||
1683 x->should_profile());
1684
1685 LIRItem array(x->array(), this);
1686 LIRItem index(x->index(), this);
1687 LIRItem value(x->value(), this);
1688 LIRItem length(this);
1689
1690 array.load_item();
1691 index.load_nonconstant();
1692
1693 if (use_length && needs_range_check) {
1694 length.set_instruction(x->length());
1695 length.load_item();
1696
1697 }
1698 if (needs_store_check || x->check_boolean()) {
1699 value.load_item();
1700 } else {
1701 value.load_for_store(x->elt_type());
1702 }
1703
1704 set_no_result(x);
1705
1706 // the CodeEmitInfo must be duplicated for each different
1707 // LIR-instruction because spilling can occur anywhere between two
1708 // instructions and so the debug information must be different
1709 CodeEmitInfo* range_check_info = state_for(x);
1710 CodeEmitInfo* null_check_info = NULL;
1711 if (x->needs_null_check()) {
1712 null_check_info = new CodeEmitInfo(range_check_info);
1713 }
1714
1715 if (GenerateRangeChecks && needs_range_check) {
1716 if (use_length) {
1717 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1718 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
1719 } else {
1720 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1721 // range_check also does the null check
1722 null_check_info = NULL;
1723 }
1724 }
1725
1726 if (GenerateArrayStoreCheck && needs_store_check) {
1727 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
1728 array_store_check(value.result(), array.result(), store_check_info, x->profiled_method(), x->profiled_bci());
1729 }
1730
1731 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1732 if (x->check_boolean()) {
1733 decorators |= C1_MASK_BOOLEAN;
1734 }
1735
1736 access_store_at(decorators, x->elt_type(), array, index.result(), value.result(),
1737 NULL, null_check_info);
1738 }
1739
1740 void LIRGenerator::access_load_at(DecoratorSet decorators, BasicType type,
1741 LIRItem& base, LIR_Opr offset, LIR_Opr result,
1742 CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info) {
1743 decorators |= ACCESS_READ;
1744 LIRAccess access(this, decorators, base, offset, type, patch_info, load_emit_info);
1745 if (access.is_raw()) {
1746 _barrier_set->BarrierSetC1::load_at(access, result);
1747 } else {
1748 _barrier_set->load_at(access, result);
1749 }
1750 }
1751
1752 void LIRGenerator::access_load(DecoratorSet decorators, BasicType type,
1753 LIR_Opr addr, LIR_Opr result) {
1754 decorators |= ACCESS_READ;
1755 LIRAccess access(this, decorators, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, type);
1756 access.set_resolved_addr(addr);
1757 if (access.is_raw()) {
1758 _barrier_set->BarrierSetC1::load(access, result);
1759 } else {
1760 _barrier_set->load(access, result);
1761 }
1762 }
1763
1764 void LIRGenerator::access_store_at(DecoratorSet decorators, BasicType type,
1765 LIRItem& base, LIR_Opr offset, LIR_Opr value,
1766 CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
1767 decorators |= ACCESS_WRITE;
1768 LIRAccess access(this, decorators, base, offset, type, patch_info, store_emit_info);
1769 if (access.is_raw()) {
1770 _barrier_set->BarrierSetC1::store_at(access, value);
1771 } else {
1772 _barrier_set->store_at(access, value);
1773 }
1774 }
1775
1776 LIR_Opr LIRGenerator::access_atomic_cmpxchg_at(DecoratorSet decorators, BasicType type,
1777 LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
1778 decorators |= ACCESS_READ;
1779 decorators |= ACCESS_WRITE;
1780 // Atomic operations are SEQ_CST by default
1781 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1782 LIRAccess access(this, decorators, base, offset, type);
1783 if (access.is_raw()) {
1784 return _barrier_set->BarrierSetC1::atomic_cmpxchg_at(access, cmp_value, new_value);
1785 } else {
1786 return _barrier_set->atomic_cmpxchg_at(access, cmp_value, new_value);
1787 }
1788 }
1789
1790 LIR_Opr LIRGenerator::access_atomic_xchg_at(DecoratorSet decorators, BasicType type,
1791 LIRItem& base, LIRItem& offset, LIRItem& value) {
1792 decorators |= ACCESS_READ;
1793 decorators |= ACCESS_WRITE;
1794 // Atomic operations are SEQ_CST by default
1795 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1796 LIRAccess access(this, decorators, base, offset, type);
1797 if (access.is_raw()) {
1798 return _barrier_set->BarrierSetC1::atomic_xchg_at(access, value);
1799 } else {
1800 return _barrier_set->atomic_xchg_at(access, value);
1801 }
1802 }
1803
1804 LIR_Opr LIRGenerator::access_atomic_add_at(DecoratorSet decorators, BasicType type,
1805 LIRItem& base, LIRItem& offset, LIRItem& value) {
1806 decorators |= ACCESS_READ;
1807 decorators |= ACCESS_WRITE;
1808 // Atomic operations are SEQ_CST by default
1809 decorators |= ((decorators & MO_DECORATOR_MASK) == 0) ? MO_SEQ_CST : 0;
1810 LIRAccess access(this, decorators, base, offset, type);
1811 if (access.is_raw()) {
1812 return _barrier_set->BarrierSetC1::atomic_add_at(access, value);
1813 } else {
1814 return _barrier_set->atomic_add_at(access, value);
1815 }
1816 }
1817
1818 void LIRGenerator::do_LoadField(LoadField* x) {
1819 bool needs_patching = x->needs_patching();
1820 bool is_volatile = x->field()->is_volatile();
1821 BasicType field_type = x->field_type();
1822
1823 CodeEmitInfo* info = NULL;
1824 if (needs_patching) {
1825 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
1826 info = state_for(x, x->state_before());
1827 } else if (x->needs_null_check()) {
1828 NullCheck* nc = x->explicit_null_check();
1829 if (nc == NULL) {
1830 info = state_for(x);
1831 } else {
1832 info = state_for(nc);
1833 }
1834 }
1835
1836 LIRItem object(x->obj(), this);
1837
1838 object.load_item();
1839
1840 #ifndef PRODUCT
1841 if (PrintNotLoaded && needs_patching) {
1842 tty->print_cr(" ###class not loaded at load_%s bci %d",
1843 x->is_static() ? "static" : "field", x->printable_bci());
1844 }
1845 #endif
1846
1847 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception();
1848 if (x->needs_null_check() &&
1849 (needs_patching ||
1850 MacroAssembler::needs_explicit_null_check(x->offset()) ||
1851 stress_deopt)) {
1852 LIR_Opr obj = object.result();
1853 if (stress_deopt) {
1854 obj = new_register(T_OBJECT);
1855 __ move(LIR_OprFact::oopConst(NULL), obj);
1856 }
1857 // Emit an explicit null check because the offset is too large.
1858 // If the class is not loaded and the object is NULL, we need to deoptimize to throw a
1859 // NoClassDefFoundError in the interpreter instead of an implicit NPE from compiled code.
1860 __ null_check(obj, new CodeEmitInfo(info), /* deoptimize */ needs_patching);
1861 }
1862
1863 DecoratorSet decorators = IN_HEAP;
1864 if (is_volatile) {
1865 decorators |= MO_SEQ_CST;
1866 }
1867 if (needs_patching) {
1868 decorators |= C1_NEEDS_PATCHING;
1869 }
1870
1871 LIR_Opr result = rlock_result(x, field_type);
1872 access_load_at(decorators, field_type,
1873 object, LIR_OprFact::intConst(x->offset()), result,
1874 info ? new CodeEmitInfo(info) : NULL, info);
1875 }
1876
1877
1878 //------------------------java.nio.Buffer.checkIndex------------------------
1879
1880 // int java.nio.Buffer.checkIndex(int)
1881 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
1882 // NOTE: by the time we are in checkIndex() we are guaranteed that
1883 // the buffer is non-null (because checkIndex is package-private and
1884 // only called from within other methods in the buffer).
1885 assert(x->number_of_arguments() == 2, "wrong type");
1886 LIRItem buf (x->argument_at(0), this);
1887 LIRItem index(x->argument_at(1), this);
1888 buf.load_item();
1889 index.load_item();
1890
1891 LIR_Opr result = rlock_result(x);
1892 if (GenerateRangeChecks) {
1893 CodeEmitInfo* info = state_for(x);
1894 CodeStub* stub = new RangeCheckStub(info, index.result());
1895 if (index.result()->is_constant()) {
1896 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
1897 __ branch(lir_cond_belowEqual, stub);
1898 } else {
1899 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(),
1900 java_nio_Buffer::limit_offset(), T_INT, info);
1901 __ branch(lir_cond_aboveEqual, stub);
1902 }
1903 __ move(index.result(), result);
1904 } else {
1905 // Just load the index into the result register
1906 __ move(index.result(), result);
1907 }
1908 }
1909
1910
1911 //------------------------array access--------------------------------------
1912
1913
1914 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
1915 LIRItem array(x->array(), this);
1916 array.load_item();
1917 LIR_Opr reg = rlock_result(x);
1918
1919 CodeEmitInfo* info = NULL;
1920 if (x->needs_null_check()) {
1921 NullCheck* nc = x->explicit_null_check();
1922 if (nc == NULL) {
1923 info = state_for(x);
1924 } else {
1925 info = state_for(nc);
1926 }
1927 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) {
1928 LIR_Opr obj = new_register(T_OBJECT);
1929 __ move(LIR_OprFact::oopConst(NULL), obj);
1930 __ null_check(obj, new CodeEmitInfo(info));
1931 }
1932 }
1933 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
1934 }
1935
1936
1937 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
1938 bool use_length = x->length() != NULL;
1939 LIRItem array(x->array(), this);
1940 LIRItem index(x->index(), this);
1941 LIRItem length(this);
1942 bool needs_range_check = x->compute_needs_range_check();
1943
1944 if (use_length && needs_range_check) {
1945 length.set_instruction(x->length());
1946 length.load_item();
1947 }
1948
1949 array.load_item();
1950 if (index.is_constant() && can_inline_as_constant(x->index())) {
1951 // let it be a constant
1952 index.dont_load_item();
1953 } else {
1954 index.load_item();
1955 }
1956
1957 CodeEmitInfo* range_check_info = state_for(x);
1958 CodeEmitInfo* null_check_info = NULL;
1959 if (x->needs_null_check()) {
1960 NullCheck* nc = x->explicit_null_check();
1961 if (nc != NULL) {
1962 null_check_info = state_for(nc);
1963 } else {
1964 null_check_info = range_check_info;
1965 }
1966 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) {
1967 LIR_Opr obj = new_register(T_OBJECT);
1968 __ move(LIR_OprFact::oopConst(NULL), obj);
1969 __ null_check(obj, new CodeEmitInfo(null_check_info));
1970 }
1971 }
1972
1973 if (GenerateRangeChecks && needs_range_check) {
1974 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) {
1975 __ branch(lir_cond_always, new RangeCheckStub(range_check_info, index.result(), array.result()));
1976 } else if (use_length) {
1977 // TODO: use a (modified) version of array_range_check that does not require a
1978 // constant length to be loaded to a register
1979 __ cmp(lir_cond_belowEqual, length.result(), index.result());
1980 __ branch(lir_cond_belowEqual, new RangeCheckStub(range_check_info, index.result(), array.result()));
1981 } else {
1982 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
1983 // The range check performs the null check, so clear it out for the load
1984 null_check_info = NULL;
1985 }
1986 }
1987
1988 DecoratorSet decorators = IN_HEAP | IS_ARRAY;
1989
1990 LIR_Opr result = rlock_result(x, x->elt_type());
1991 access_load_at(decorators, x->elt_type(),
1992 array, index.result(), result,
1993 NULL, null_check_info);
1994 }
1995
1996
1997 void LIRGenerator::do_NullCheck(NullCheck* x) {
1998 if (x->can_trap()) {
1999 LIRItem value(x->obj(), this);
2000 value.load_item();
2001 CodeEmitInfo* info = state_for(x);
2002 __ null_check(value.result(), info);
2003 }
2004 }
2005
2006
2007 void LIRGenerator::do_TypeCast(TypeCast* x) {
2008 LIRItem value(x->obj(), this);
2009 value.load_item();
2010 // the result is the same as from the node we are casting
2011 set_result(x, value.result());
2012 }
2013
2014
2015 void LIRGenerator::do_Throw(Throw* x) {
2016 LIRItem exception(x->exception(), this);
2017 exception.load_item();
2018 set_no_result(x);
2019 LIR_Opr exception_opr = exception.result();
2020 CodeEmitInfo* info = state_for(x, x->state());
2021
2022 #ifndef PRODUCT
2023 if (PrintC1Statistics) {
2024 increment_counter(Runtime1::throw_count_address(), T_INT);
2025 }
2026 #endif
2027
2028 // check if the instruction has an xhandler in any of the nested scopes
2029 bool unwind = false;
2030 if (info->exception_handlers()->length() == 0) {
2031 // this throw is not inside an xhandler
2032 unwind = true;
2033 } else {
2034 // get some idea of the throw type
2035 bool type_is_exact = true;
2036 ciType* throw_type = x->exception()->exact_type();
2037 if (throw_type == NULL) {
2038 type_is_exact = false;
2039 throw_type = x->exception()->declared_type();
2040 }
2041 if (throw_type != NULL && throw_type->is_instance_klass()) {
2042 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
2043 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
2044 }
2045 }
2046
2047 // do null check before moving exception oop into fixed register
2048 // to avoid a fixed interval with an oop during the null check.
2049 // Use a copy of the CodeEmitInfo because debug information is
2050 // different for null_check and throw.
2051 if (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL) {
2052 // if the exception object wasn't created using new then it might be null.
2053 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci())));
2054 }
2055
2056 if (compilation()->env()->jvmti_can_post_on_exceptions()) {
2057 // we need to go through the exception lookup path to get JVMTI
2058 // notification done
2059 unwind = false;
2060 }
2061
2062 // move exception oop into fixed register
2063 __ move(exception_opr, exceptionOopOpr());
2064
2065 if (unwind) {
2066 __ unwind_exception(exceptionOopOpr());
2067 } else {
2068 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
2069 }
2070 }
2071
2072
2073 void LIRGenerator::do_RoundFP(RoundFP* x) {
2074 assert(strict_fp_requires_explicit_rounding, "not required");
2075
2076 LIRItem input(x->input(), this);
2077 input.load_item();
2078 LIR_Opr input_opr = input.result();
2079 assert(input_opr->is_register(), "why round if value is not in a register?");
2080 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
2081 if (input_opr->is_single_fpu()) {
2082 set_result(x, round_item(input_opr)); // This code path not currently taken
2083 } else {
2084 LIR_Opr result = new_register(T_DOUBLE);
2085 set_vreg_flag(result, must_start_in_memory);
2086 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
2087 set_result(x, result);
2088 }
2089 }
2090
2091 // Here UnsafeGetRaw may have x->base() and x->index() be int or long
2092 // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit.
2093 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
2094 LIRItem base(x->base(), this);
2095 LIRItem idx(this);
2096
2097 base.load_item();
2098 if (x->has_index()) {
2099 idx.set_instruction(x->index());
2100 idx.load_nonconstant();
2101 }
2102
2103 LIR_Opr reg = rlock_result(x, x->basic_type());
2104
2105 int log2_scale = 0;
2106 if (x->has_index()) {
2107 log2_scale = x->log2_scale();
2108 }
2109
2110 assert(!x->has_index() || idx.value() == x->index(), "should match");
2111
2112 LIR_Opr base_op = base.result();
2113 LIR_Opr index_op = idx.result();
2114 #ifndef _LP64
2115 if (base_op->type() == T_LONG) {
2116 base_op = new_register(T_INT);
2117 __ convert(Bytecodes::_l2i, base.result(), base_op);
2118 }
2119 if (x->has_index()) {
2120 if (index_op->type() == T_LONG) {
2121 LIR_Opr long_index_op = index_op;
2122 if (index_op->is_constant()) {
2123 long_index_op = new_register(T_LONG);
2124 __ move(index_op, long_index_op);
2125 }
2126 index_op = new_register(T_INT);
2127 __ convert(Bytecodes::_l2i, long_index_op, index_op);
2128 } else {
2129 assert(x->index()->type()->tag() == intTag, "must be");
2130 }
2131 }
2132 // At this point base and index should be all ints.
2133 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2134 assert(!x->has_index() || index_op->type() == T_INT, "index should be an int");
2135 #else
2136 if (x->has_index()) {
2137 if (index_op->type() == T_INT) {
2138 if (!index_op->is_constant()) {
2139 index_op = new_register(T_LONG);
2140 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2141 }
2142 } else {
2143 assert(index_op->type() == T_LONG, "must be");
2144 if (index_op->is_constant()) {
2145 index_op = new_register(T_LONG);
2146 __ move(idx.result(), index_op);
2147 }
2148 }
2149 }
2150 // At this point base is a long non-constant
2151 // Index is a long register or a int constant.
2152 // We allow the constant to stay an int because that would allow us a more compact encoding by
2153 // embedding an immediate offset in the address expression. If we have a long constant, we have to
2154 // move it into a register first.
2155 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant");
2156 assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) ||
2157 (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type");
2158 #endif
2159
2160 BasicType dst_type = x->basic_type();
2161
2162 LIR_Address* addr;
2163 if (index_op->is_constant()) {
2164 assert(log2_scale == 0, "must not have a scale");
2165 assert(index_op->type() == T_INT, "only int constants supported");
2166 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
2167 } else {
2168 #ifdef X86
2169 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
2170 #elif defined(GENERATE_ADDRESS_IS_PREFERRED)
2171 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type);
2172 #else
2173 if (index_op->is_illegal() || log2_scale == 0) {
2174 addr = new LIR_Address(base_op, index_op, dst_type);
2175 } else {
2176 LIR_Opr tmp = new_pointer_register();
2177 __ shift_left(index_op, log2_scale, tmp);
2178 addr = new LIR_Address(base_op, tmp, dst_type);
2179 }
2180 #endif
2181 }
2182
2183 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
2184 __ unaligned_move(addr, reg);
2185 } else {
2186 if (dst_type == T_OBJECT && x->is_wide()) {
2187 __ move_wide(addr, reg);
2188 } else {
2189 __ move(addr, reg);
2190 }
2191 }
2192 }
2193
2194
2195 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
2196 int log2_scale = 0;
2197 BasicType type = x->basic_type();
2198
2199 if (x->has_index()) {
2200 log2_scale = x->log2_scale();
2201 }
2202
2203 LIRItem base(x->base(), this);
2204 LIRItem value(x->value(), this);
2205 LIRItem idx(this);
2206
2207 base.load_item();
2208 if (x->has_index()) {
2209 idx.set_instruction(x->index());
2210 idx.load_item();
2211 }
2212
2213 if (type == T_BYTE || type == T_BOOLEAN) {
2214 value.load_byte_item();
2215 } else {
2216 value.load_item();
2217 }
2218
2219 set_no_result(x);
2220
2221 LIR_Opr base_op = base.result();
2222 LIR_Opr index_op = idx.result();
2223
2224 #ifdef GENERATE_ADDRESS_IS_PREFERRED
2225 LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type());
2226 #else
2227 #ifndef _LP64
2228 if (base_op->type() == T_LONG) {
2229 base_op = new_register(T_INT);
2230 __ convert(Bytecodes::_l2i, base.result(), base_op);
2231 }
2232 if (x->has_index()) {
2233 if (index_op->type() == T_LONG) {
2234 index_op = new_register(T_INT);
2235 __ convert(Bytecodes::_l2i, idx.result(), index_op);
2236 }
2237 }
2238 // At this point base and index should be all ints and not constants
2239 assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int");
2240 assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int");
2241 #else
2242 if (x->has_index()) {
2243 if (index_op->type() == T_INT) {
2244 index_op = new_register(T_LONG);
2245 __ convert(Bytecodes::_i2l, idx.result(), index_op);
2246 }
2247 }
2248 // At this point base and index are long and non-constant
2249 assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long");
2250 assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long");
2251 #endif
2252
2253 if (log2_scale != 0) {
2254 // temporary fix (platform dependent code without shift on Intel would be better)
2255 // TODO: ARM also allows embedded shift in the address
2256 LIR_Opr tmp = new_pointer_register();
2257 if (TwoOperandLIRForm) {
2258 __ move(index_op, tmp);
2259 index_op = tmp;
2260 }
2261 __ shift_left(index_op, log2_scale, tmp);
2262 if (!TwoOperandLIRForm) {
2263 index_op = tmp;
2264 }
2265 }
2266
2267 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
2268 #endif // !GENERATE_ADDRESS_IS_PREFERRED
2269 __ move(value.result(), addr);
2270 }
2271
2272
2273 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
2274 BasicType type = x->basic_type();
2275 LIRItem src(x->object(), this);
2276 LIRItem off(x->offset(), this);
2277
2278 off.load_item();
2279 src.load_item();
2280
2281 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2282
2283 if (x->is_volatile()) {
2284 decorators |= MO_SEQ_CST;
2285 }
2286 if (type == T_BOOLEAN) {
2287 decorators |= C1_MASK_BOOLEAN;
2288 }
2289 if (is_reference_type(type)) {
2290 decorators |= ON_UNKNOWN_OOP_REF;
2291 }
2292
2293 LIR_Opr result = rlock_result(x, type);
2294 access_load_at(decorators, type,
2295 src, off.result(), result);
2296 }
2297
2298
2299 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
2300 BasicType type = x->basic_type();
2301 LIRItem src(x->object(), this);
2302 LIRItem off(x->offset(), this);
2303 LIRItem data(x->value(), this);
2304
2305 src.load_item();
2306 if (type == T_BOOLEAN || type == T_BYTE) {
2307 data.load_byte_item();
2308 } else {
2309 data.load_item();
2310 }
2311 off.load_item();
2312
2313 set_no_result(x);
2314
2315 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS;
2316 if (is_reference_type(type)) {
2317 decorators |= ON_UNKNOWN_OOP_REF;
2318 }
2319 if (x->is_volatile()) {
2320 decorators |= MO_SEQ_CST;
2321 }
2322 access_store_at(decorators, type, src, off.result(), data.result());
2323 }
2324
2325 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
2326 BasicType type = x->basic_type();
2327 LIRItem src(x->object(), this);
2328 LIRItem off(x->offset(), this);
2329 LIRItem value(x->value(), this);
2330
2331 DecoratorSet decorators = IN_HEAP | C1_UNSAFE_ACCESS | MO_SEQ_CST;
2332
2333 if (is_reference_type(type)) {
2334 decorators |= ON_UNKNOWN_OOP_REF;
2335 }
2336
2337 LIR_Opr result;
2338 if (x->is_add()) {
2339 result = access_atomic_add_at(decorators, type, src, off, value);
2340 } else {
2341 result = access_atomic_xchg_at(decorators, type, src, off, value);
2342 }
2343 set_result(x, result);
2344 }
2345
2346 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
2347 int lng = x->length();
2348
2349 for (int i = 0; i < lng; i++) {
2350 C1SwitchRange* one_range = x->at(i);
2351 int low_key = one_range->low_key();
2352 int high_key = one_range->high_key();
2353 BlockBegin* dest = one_range->sux();
2354 if (low_key == high_key) {
2355 __ cmp(lir_cond_equal, value, low_key);
2356 __ branch(lir_cond_equal, dest);
2357 } else if (high_key - low_key == 1) {
2358 __ cmp(lir_cond_equal, value, low_key);
2359 __ branch(lir_cond_equal, dest);
2360 __ cmp(lir_cond_equal, value, high_key);
2361 __ branch(lir_cond_equal, dest);
2362 } else {
2363 LabelObj* L = new LabelObj();
2364 __ cmp(lir_cond_less, value, low_key);
2365 __ branch(lir_cond_less, L->label());
2366 __ cmp(lir_cond_lessEqual, value, high_key);
2367 __ branch(lir_cond_lessEqual, dest);
2368 __ branch_destination(L->label());
2369 }
2370 }
2371 __ jump(default_sux);
2372 }
2373
2374
2375 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
2376 SwitchRangeList* res = new SwitchRangeList();
2377 int len = x->length();
2378 if (len > 0) {
2379 BlockBegin* sux = x->sux_at(0);
2380 int key = x->lo_key();
2381 BlockBegin* default_sux = x->default_sux();
2382 C1SwitchRange* range = new C1SwitchRange(key, sux);
2383 for (int i = 0; i < len; i++, key++) {
2384 BlockBegin* new_sux = x->sux_at(i);
2385 if (sux == new_sux) {
2386 // still in same range
2387 range->set_high_key(key);
2388 } else {
2389 // skip tests which explicitly dispatch to the default
2390 if (sux != default_sux) {
2391 res->append(range);
2392 }
2393 range = new C1SwitchRange(key, new_sux);
2394 }
2395 sux = new_sux;
2396 }
2397 if (res->length() == 0 || res->last() != range) res->append(range);
2398 }
2399 return res;
2400 }
2401
2402
2403 // we expect the keys to be sorted by increasing value
2404 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
2405 SwitchRangeList* res = new SwitchRangeList();
2406 int len = x->length();
2407 if (len > 0) {
2408 BlockBegin* default_sux = x->default_sux();
2409 int key = x->key_at(0);
2410 BlockBegin* sux = x->sux_at(0);
2411 C1SwitchRange* range = new C1SwitchRange(key, sux);
2412 for (int i = 1; i < len; i++) {
2413 int new_key = x->key_at(i);
2414 BlockBegin* new_sux = x->sux_at(i);
2415 if (key+1 == new_key && sux == new_sux) {
2416 // still in same range
2417 range->set_high_key(new_key);
2418 } else {
2419 // skip tests which explicitly dispatch to the default
2420 if (range->sux() != default_sux) {
2421 res->append(range);
2422 }
2423 range = new C1SwitchRange(new_key, new_sux);
2424 }
2425 key = new_key;
2426 sux = new_sux;
2427 }
2428 if (res->length() == 0 || res->last() != range) res->append(range);
2429 }
2430 return res;
2431 }
2432
2433
2434 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
2435 LIRItem tag(x->tag(), this);
2436 tag.load_item();
2437 set_no_result(x);
2438
2439 if (x->is_safepoint()) {
2440 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2441 }
2442
2443 // move values into phi locations
2444 move_to_phi(x->state());
2445
2446 int lo_key = x->lo_key();
2447 int len = x->length();
2448 assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
2449 LIR_Opr value = tag.result();
2450
2451 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2452 ciMethod* method = x->state()->scope()->method();
2453 ciMethodData* md = method->method_data_or_null();
2454 assert(md != NULL, "Sanity");
2455 ciProfileData* data = md->bci_to_data(x->state()->bci());
2456 assert(data != NULL, "must have profiling data");
2457 assert(data->is_MultiBranchData(), "bad profile data?");
2458 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2459 LIR_Opr md_reg = new_register(T_METADATA);
2460 __ metadata2reg(md->constant_encoding(), md_reg);
2461 LIR_Opr data_offset_reg = new_pointer_register();
2462 LIR_Opr tmp_reg = new_pointer_register();
2463
2464 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2465 for (int i = 0; i < len; i++) {
2466 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2467 __ cmp(lir_cond_equal, value, i + lo_key);
2468 __ move(data_offset_reg, tmp_reg);
2469 __ cmove(lir_cond_equal,
2470 LIR_OprFact::intptrConst(count_offset),
2471 tmp_reg,
2472 data_offset_reg, T_INT);
2473 }
2474
2475 LIR_Opr data_reg = new_pointer_register();
2476 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2477 __ move(data_addr, data_reg);
2478 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2479 __ move(data_reg, data_addr);
2480 }
2481
2482 if (UseTableRanges) {
2483 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2484 } else {
2485 for (int i = 0; i < len; i++) {
2486 __ cmp(lir_cond_equal, value, i + lo_key);
2487 __ branch(lir_cond_equal, x->sux_at(i));
2488 }
2489 __ jump(x->default_sux());
2490 }
2491 }
2492
2493
2494 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
2495 LIRItem tag(x->tag(), this);
2496 tag.load_item();
2497 set_no_result(x);
2498
2499 if (x->is_safepoint()) {
2500 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
2501 }
2502
2503 // move values into phi locations
2504 move_to_phi(x->state());
2505
2506 LIR_Opr value = tag.result();
2507 int len = x->length();
2508
2509 if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
2510 ciMethod* method = x->state()->scope()->method();
2511 ciMethodData* md = method->method_data_or_null();
2512 assert(md != NULL, "Sanity");
2513 ciProfileData* data = md->bci_to_data(x->state()->bci());
2514 assert(data != NULL, "must have profiling data");
2515 assert(data->is_MultiBranchData(), "bad profile data?");
2516 int default_count_offset = md->byte_offset_of_slot(data, MultiBranchData::default_count_offset());
2517 LIR_Opr md_reg = new_register(T_METADATA);
2518 __ metadata2reg(md->constant_encoding(), md_reg);
2519 LIR_Opr data_offset_reg = new_pointer_register();
2520 LIR_Opr tmp_reg = new_pointer_register();
2521
2522 __ move(LIR_OprFact::intptrConst(default_count_offset), data_offset_reg);
2523 for (int i = 0; i < len; i++) {
2524 int count_offset = md->byte_offset_of_slot(data, MultiBranchData::case_count_offset(i));
2525 __ cmp(lir_cond_equal, value, x->key_at(i));
2526 __ move(data_offset_reg, tmp_reg);
2527 __ cmove(lir_cond_equal,
2528 LIR_OprFact::intptrConst(count_offset),
2529 tmp_reg,
2530 data_offset_reg, T_INT);
2531 }
2532
2533 LIR_Opr data_reg = new_pointer_register();
2534 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type());
2535 __ move(data_addr, data_reg);
2536 __ add(data_reg, LIR_OprFact::intptrConst(1), data_reg);
2537 __ move(data_reg, data_addr);
2538 }
2539
2540 if (UseTableRanges) {
2541 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
2542 } else {
2543 int len = x->length();
2544 for (int i = 0; i < len; i++) {
2545 __ cmp(lir_cond_equal, value, x->key_at(i));
2546 __ branch(lir_cond_equal, x->sux_at(i));
2547 }
2548 __ jump(x->default_sux());
2549 }
2550 }
2551
2552
2553 void LIRGenerator::do_Goto(Goto* x) {
2554 set_no_result(x);
2555
2556 if (block()->next()->as_OsrEntry()) {
2557 // need to free up storage used for OSR entry point
2558 LIR_Opr osrBuffer = block()->next()->operand();
2559 BasicTypeList signature;
2560 signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer
2561 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
2562 __ move(osrBuffer, cc->args()->at(0));
2563 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
2564 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
2565 }
2566
2567 if (x->is_safepoint()) {
2568 ValueStack* state = x->state_before() ? x->state_before() : x->state();
2569
2570 // increment backedge counter if needed
2571 CodeEmitInfo* info = state_for(x, state);
2572 increment_backedge_counter(info, x->profiled_bci());
2573 CodeEmitInfo* safepoint_info = state_for(x, state);
2574 __ safepoint(safepoint_poll_register(), safepoint_info);
2575 }
2576
2577 // Gotos can be folded Ifs, handle this case.
2578 if (x->should_profile()) {
2579 ciMethod* method = x->profiled_method();
2580 assert(method != NULL, "method should be set if branch is profiled");
2581 ciMethodData* md = method->method_data_or_null();
2582 assert(md != NULL, "Sanity");
2583 ciProfileData* data = md->bci_to_data(x->profiled_bci());
2584 assert(data != NULL, "must have profiling data");
2585 int offset;
2586 if (x->direction() == Goto::taken) {
2587 assert(data->is_BranchData(), "need BranchData for two-way branches");
2588 offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
2589 } else if (x->direction() == Goto::not_taken) {
2590 assert(data->is_BranchData(), "need BranchData for two-way branches");
2591 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
2592 } else {
2593 assert(data->is_JumpData(), "need JumpData for branches");
2594 offset = md->byte_offset_of_slot(data, JumpData::taken_offset());
2595 }
2596 LIR_Opr md_reg = new_register(T_METADATA);
2597 __ metadata2reg(md->constant_encoding(), md_reg);
2598
2599 increment_counter(new LIR_Address(md_reg, offset,
2600 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment);
2601 }
2602
2603 // emit phi-instruction move after safepoint since this simplifies
2604 // describing the state as the safepoint.
2605 move_to_phi(x->state());
2606
2607 __ jump(x->default_sux());
2608 }
2609
2610 /**
2611 * Emit profiling code if needed for arguments, parameters, return value types
2612 *
2613 * @param md MDO the code will update at runtime
2614 * @param md_base_offset common offset in the MDO for this profile and subsequent ones
2615 * @param md_offset offset in the MDO (on top of md_base_offset) for this profile
2616 * @param profiled_k current profile
2617 * @param obj IR node for the object to be profiled
2618 * @param mdp register to hold the pointer inside the MDO (md + md_base_offset).
2619 * Set once we find an update to make and use for next ones.
2620 * @param not_null true if we know obj cannot be null
2621 * @param signature_at_call_k signature at call for obj
2622 * @param callee_signature_k signature of callee for obj
2623 * at call and callee signatures differ at method handle call
2624 * @return the only klass we know will ever be seen at this profile point
2625 */
2626 ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k,
2627 Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
2628 ciKlass* callee_signature_k) {
2629 ciKlass* result = NULL;
2630 bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k);
2631 bool do_update = !TypeEntries::is_type_unknown(profiled_k);
2632 // known not to be null or null bit already set and already set to
2633 // unknown: nothing we can do to improve profiling
2634 if (!do_null && !do_update) {
2635 return result;
2636 }
2637
2638 ciKlass* exact_klass = NULL;
2639 Compilation* comp = Compilation::current();
2640 if (do_update) {
2641 // try to find exact type, using CHA if possible, so that loading
2642 // the klass from the object can be avoided
2643 ciType* type = obj->exact_type();
2644 if (type == NULL) {
2645 type = obj->declared_type();
2646 type = comp->cha_exact_type(type);
2647 }
2648 assert(type == NULL || type->is_klass(), "type should be class");
2649 exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL;
2650
2651 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2652 }
2653
2654 if (!do_null && !do_update) {
2655 return result;
2656 }
2657
2658 ciKlass* exact_signature_k = NULL;
2659 if (do_update) {
2660 // Is the type from the signature exact (the only one possible)?
2661 exact_signature_k = signature_at_call_k->exact_klass();
2662 if (exact_signature_k == NULL) {
2663 exact_signature_k = comp->cha_exact_type(signature_at_call_k);
2664 } else {
2665 result = exact_signature_k;
2666 // Known statically. No need to emit any code: prevent
2667 // LIR_Assembler::emit_profile_type() from emitting useless code
2668 profiled_k = ciTypeEntries::with_status(result, profiled_k);
2669 }
2670 // exact_klass and exact_signature_k can be both non NULL but
2671 // different if exact_klass is loaded after the ciObject for
2672 // exact_signature_k is created.
2673 if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) {
2674 // sometimes the type of the signature is better than the best type
2675 // the compiler has
2676 exact_klass = exact_signature_k;
2677 }
2678 if (callee_signature_k != NULL &&
2679 callee_signature_k != signature_at_call_k) {
2680 ciKlass* improved_klass = callee_signature_k->exact_klass();
2681 if (improved_klass == NULL) {
2682 improved_klass = comp->cha_exact_type(callee_signature_k);
2683 }
2684 if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) {
2685 exact_klass = exact_signature_k;
2686 }
2687 }
2688 do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass;
2689 }
2690
2691 if (!do_null && !do_update) {
2692 return result;
2693 }
2694
2695 if (mdp == LIR_OprFact::illegalOpr) {
2696 mdp = new_register(T_METADATA);
2697 __ metadata2reg(md->constant_encoding(), mdp);
2698 if (md_base_offset != 0) {
2699 LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS);
2700 mdp = new_pointer_register();
2701 __ leal(LIR_OprFact::address(base_type_address), mdp);
2702 }
2703 }
2704 LIRItem value(obj, this);
2705 value.load_item();
2706 __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA),
2707 value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL);
2708 return result;
2709 }
2710
2711 // profile parameters on entry to the root of the compilation
2712 void LIRGenerator::profile_parameters(Base* x) {
2713 if (compilation()->profile_parameters()) {
2714 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2715 ciMethodData* md = scope()->method()->method_data_or_null();
2716 assert(md != NULL, "Sanity");
2717
2718 if (md->parameters_type_data() != NULL) {
2719 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
2720 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
2721 LIR_Opr mdp = LIR_OprFact::illegalOpr;
2722 for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) {
2723 LIR_Opr src = args->at(i);
2724 assert(!src->is_illegal(), "check");
2725 BasicType t = src->type();
2726 if (is_reference_type(t)) {
2727 intptr_t profiled_k = parameters->type(j);
2728 Local* local = x->state()->local_at(java_index)->as_Local();
2729 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
2730 in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)),
2731 profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL);
2732 // If the profile is known statically set it once for all and do not emit any code
2733 if (exact != NULL) {
2734 md->set_parameter_type(j, exact);
2735 }
2736 j++;
2737 }
2738 java_index += type2size[t];
2739 }
2740 }
2741 }
2742 }
2743
2744 void LIRGenerator::do_Base(Base* x) {
2745 __ std_entry(LIR_OprFact::illegalOpr);
2746 // Emit moves from physical registers / stack slots to virtual registers
2747 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
2748 IRScope* irScope = compilation()->hir()->top_scope();
2749 int java_index = 0;
2750 for (int i = 0; i < args->length(); i++) {
2751 LIR_Opr src = args->at(i);
2752 assert(!src->is_illegal(), "check");
2753 BasicType t = src->type();
2754
2755 // Types which are smaller than int are passed as int, so
2756 // correct the type which passed.
2757 switch (t) {
2758 case T_BYTE:
2759 case T_BOOLEAN:
2760 case T_SHORT:
2761 case T_CHAR:
2762 t = T_INT;
2763 break;
2764 default:
2765 break;
2766 }
2767
2768 LIR_Opr dest = new_register(t);
2769 __ move(src, dest);
2770
2771 // Assign new location to Local instruction for this local
2772 Local* local = x->state()->local_at(java_index)->as_Local();
2773 assert(local != NULL, "Locals for incoming arguments must have been created");
2774 #ifndef __SOFTFP__
2775 // The java calling convention passes double as long and float as int.
2776 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
2777 #endif // __SOFTFP__
2778 local->set_operand(dest);
2779 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
2780 java_index += type2size[t];
2781 }
2782
2783 if (compilation()->env()->dtrace_method_probes()) {
2784 BasicTypeList signature;
2785 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
2786 signature.append(T_METADATA); // Method*
2787 LIR_OprList* args = new LIR_OprList();
2788 args->append(getThreadPointer());
2789 LIR_Opr meth = new_register(T_METADATA);
2790 __ metadata2reg(method()->constant_encoding(), meth);
2791 args->append(meth);
2792 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
2793 }
2794
2795 if (method()->is_synchronized()) {
2796 LIR_Opr obj;
2797 if (method()->is_static()) {
2798 obj = new_register(T_OBJECT);
2799 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj);
2800 } else {
2801 Local* receiver = x->state()->local_at(0)->as_Local();
2802 assert(receiver != NULL, "must already exist");
2803 obj = receiver->operand();
2804 }
2805 assert(obj->is_valid(), "must be valid");
2806
2807 if (method()->is_synchronized() && GenerateSynchronizationCode) {
2808 LIR_Opr lock = syncLockOpr();
2809 __ load_stack_address_monitor(0, lock);
2810
2811 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException));
2812 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
2813
2814 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
2815 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
2816 }
2817 }
2818 if (compilation()->age_code()) {
2819 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false);
2820 decrement_age(info);
2821 }
2822 // increment invocation counters if needed
2823 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting.
2824 profile_parameters(x);
2825 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false);
2826 increment_invocation_counter(info);
2827 }
2828
2829 // all blocks with a successor must end with an unconditional jump
2830 // to the successor even if they are consecutive
2831 __ jump(x->default_sux());
2832 }
2833
2834
2835 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
2836 // construct our frame and model the production of incoming pointer
2837 // to the OSR buffer.
2838 __ osr_entry(LIR_Assembler::osrBufferPointer());
2839 LIR_Opr result = rlock_result(x);
2840 __ move(LIR_Assembler::osrBufferPointer(), result);
2841 }
2842
2843
2844 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
2845 assert(args->length() == arg_list->length(),
2846 "args=%d, arg_list=%d", args->length(), arg_list->length());
2847 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) {
2848 LIRItem* param = args->at(i);
2849 LIR_Opr loc = arg_list->at(i);
2850 if (loc->is_register()) {
2851 param->load_item_force(loc);
2852 } else {
2853 LIR_Address* addr = loc->as_address_ptr();
2854 param->load_for_store(addr->type());
2855 if (addr->type() == T_OBJECT) {
2856 __ move_wide(param->result(), addr);
2857 } else
2858 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
2859 __ unaligned_move(param->result(), addr);
2860 } else {
2861 __ move(param->result(), addr);
2862 }
2863 }
2864 }
2865
2866 if (x->has_receiver()) {
2867 LIRItem* receiver = args->at(0);
2868 LIR_Opr loc = arg_list->at(0);
2869 if (loc->is_register()) {
2870 receiver->load_item_force(loc);
2871 } else {
2872 assert(loc->is_address(), "just checking");
2873 receiver->load_for_store(T_OBJECT);
2874 __ move_wide(receiver->result(), loc->as_address_ptr());
2875 }
2876 }
2877 }
2878
2879
2880 // Visits all arguments, returns appropriate items without loading them
2881 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
2882 LIRItemList* argument_items = new LIRItemList();
2883 if (x->has_receiver()) {
2884 LIRItem* receiver = new LIRItem(x->receiver(), this);
2885 argument_items->append(receiver);
2886 }
2887 for (int i = 0; i < x->number_of_arguments(); i++) {
2888 LIRItem* param = new LIRItem(x->argument_at(i), this);
2889 argument_items->append(param);
2890 }
2891 return argument_items;
2892 }
2893
2894
2895 // The invoke with receiver has following phases:
2896 // a) traverse and load/lock receiver;
2897 // b) traverse all arguments -> item-array (invoke_visit_argument)
2898 // c) push receiver on stack
2899 // d) load each of the items and push on stack
2900 // e) unlock receiver
2901 // f) move receiver into receiver-register %o0
2902 // g) lock result registers and emit call operation
2903 //
2904 // Before issuing a call, we must spill-save all values on stack
2905 // that are in caller-save register. "spill-save" moves those registers
2906 // either in a free callee-save register or spills them if no free
2907 // callee save register is available.
2908 //
2909 // The problem is where to invoke spill-save.
2910 // - if invoked between e) and f), we may lock callee save
2911 // register in "spill-save" that destroys the receiver register
2912 // before f) is executed
2913 // - if we rearrange f) to be earlier (by loading %o0) it
2914 // may destroy a value on the stack that is currently in %o0
2915 // and is waiting to be spilled
2916 // - if we keep the receiver locked while doing spill-save,
2917 // we cannot spill it as it is spill-locked
2918 //
2919 void LIRGenerator::do_Invoke(Invoke* x) {
2920 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
2921
2922 LIR_OprList* arg_list = cc->args();
2923 LIRItemList* args = invoke_visit_arguments(x);
2924 LIR_Opr receiver = LIR_OprFact::illegalOpr;
2925
2926 // setup result register
2927 LIR_Opr result_register = LIR_OprFact::illegalOpr;
2928 if (x->type() != voidType) {
2929 result_register = result_register_for(x->type());
2930 }
2931
2932 CodeEmitInfo* info = state_for(x, x->state());
2933
2934 invoke_load_arguments(x, args, arg_list);
2935
2936 if (x->has_receiver()) {
2937 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
2938 receiver = args->at(0)->result();
2939 }
2940
2941 // emit invoke code
2942 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
2943
2944 // JSR 292
2945 // Preserve the SP over MethodHandle call sites, if needed.
2946 ciMethod* target = x->target();
2947 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant?
2948 target->is_method_handle_intrinsic() ||
2949 target->is_compiled_lambda_form());
2950 if (is_method_handle_invoke) {
2951 info->set_is_method_handle_invoke(true);
2952 if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2953 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr());
2954 }
2955 }
2956
2957 switch (x->code()) {
2958 case Bytecodes::_invokestatic:
2959 __ call_static(target, result_register,
2960 SharedRuntime::get_resolve_static_call_stub(),
2961 arg_list, info);
2962 break;
2963 case Bytecodes::_invokespecial:
2964 case Bytecodes::_invokevirtual:
2965 case Bytecodes::_invokeinterface:
2966 // for loaded and final (method or class) target we still produce an inline cache,
2967 // in order to be able to call mixed mode
2968 if (x->code() == Bytecodes::_invokespecial || x->target_is_final()) {
2969 __ call_opt_virtual(target, receiver, result_register,
2970 SharedRuntime::get_resolve_opt_virtual_call_stub(),
2971 arg_list, info);
2972 } else {
2973 __ call_icvirtual(target, receiver, result_register,
2974 SharedRuntime::get_resolve_virtual_call_stub(),
2975 arg_list, info);
2976 }
2977 break;
2978 case Bytecodes::_invokedynamic: {
2979 __ call_dynamic(target, receiver, result_register,
2980 SharedRuntime::get_resolve_static_call_stub(),
2981 arg_list, info);
2982 break;
2983 }
2984 default:
2985 fatal("unexpected bytecode: %s", Bytecodes::name(x->code()));
2986 break;
2987 }
2988
2989 // JSR 292
2990 // Restore the SP after MethodHandle call sites, if needed.
2991 if (is_method_handle_invoke
2992 && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) {
2993 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer());
2994 }
2995
2996 if (result_register->is_valid()) {
2997 LIR_Opr result = rlock_result(x);
2998 __ move(result_register, result);
2999 }
3000 }
3001
3002
3003 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
3004 assert(x->number_of_arguments() == 1, "wrong type");
3005 LIRItem value (x->argument_at(0), this);
3006 LIR_Opr reg = rlock_result(x);
3007 value.load_item();
3008 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
3009 __ move(tmp, reg);
3010 }
3011
3012
3013
3014 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
3015 void LIRGenerator::do_IfOp(IfOp* x) {
3016 #ifdef ASSERT
3017 {
3018 ValueTag xtag = x->x()->type()->tag();
3019 ValueTag ttag = x->tval()->type()->tag();
3020 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
3021 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
3022 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
3023 }
3024 #endif
3025
3026 LIRItem left(x->x(), this);
3027 LIRItem right(x->y(), this);
3028 left.load_item();
3029 if (can_inline_as_constant(right.value())) {
3030 right.dont_load_item();
3031 } else {
3032 right.load_item();
3033 }
3034
3035 LIRItem t_val(x->tval(), this);
3036 LIRItem f_val(x->fval(), this);
3037 t_val.dont_load_item();
3038 f_val.dont_load_item();
3039 LIR_Opr reg = rlock_result(x);
3040
3041 __ cmp(lir_cond(x->cond()), left.result(), right.result());
3042 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type()));
3043 }
3044
3045 #ifdef JFR_HAVE_INTRINSICS
3046
3047 void LIRGenerator::do_getEventWriter(Intrinsic* x) {
3048 LabelObj* L_end = new LabelObj();
3049
3050 // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
3051 // meaning of these two is mixed up (see JDK-8026837).
3052 LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(),
3053 in_bytes(THREAD_LOCAL_WRITER_OFFSET_JFR),
3054 T_ADDRESS);
3055 LIR_Opr result = rlock_result(x);
3056 __ move(LIR_OprFact::oopConst(NULL), result);
3057 LIR_Opr jobj = new_register(T_METADATA);
3058 __ move_wide(jobj_addr, jobj);
3059 __ cmp(lir_cond_equal, jobj, LIR_OprFact::metadataConst(0));
3060 __ branch(lir_cond_equal, L_end->label());
3061
3062 access_load(IN_NATIVE, T_OBJECT, LIR_OprFact::address(new LIR_Address(jobj, T_OBJECT)), result);
3063
3064 __ branch_destination(L_end->label());
3065 }
3066
3067 #endif
3068
3069
3070 void LIRGenerator::do_RuntimeCall(address routine, Intrinsic* x) {
3071 assert(x->number_of_arguments() == 0, "wrong type");
3072 // Enforce computation of _reserved_argument_area_size which is required on some platforms.
3073 BasicTypeList signature;
3074 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
3075 LIR_Opr reg = result_register_for(x->type());
3076 __ call_runtime_leaf(routine, getThreadTemp(),
3077 reg, new LIR_OprList());
3078 LIR_Opr result = rlock_result(x);
3079 __ move(reg, result);
3080 }
3081
3082
3083
3084 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
3085 switch (x->id()) {
3086 case vmIntrinsics::_intBitsToFloat :
3087 case vmIntrinsics::_doubleToRawLongBits :
3088 case vmIntrinsics::_longBitsToDouble :
3089 case vmIntrinsics::_floatToRawIntBits : {
3090 do_FPIntrinsics(x);
3091 break;
3092 }
3093
3094 #ifdef JFR_HAVE_INTRINSICS
3095 case vmIntrinsics::_getEventWriter:
3096 do_getEventWriter(x);
3097 break;
3098 case vmIntrinsics::_counterTime:
3099 do_RuntimeCall(CAST_FROM_FN_PTR(address, JFR_TIME_FUNCTION), x);
3100 break;
3101 #endif
3102
3103 case vmIntrinsics::_currentTimeMillis:
3104 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), x);
3105 break;
3106
3107 case vmIntrinsics::_nanoTime:
3108 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), x);
3109 break;
3110
3111 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
3112 case vmIntrinsics::_isInstance: do_isInstance(x); break;
3113 case vmIntrinsics::_isPrimitive: do_isPrimitive(x); break;
3114 case vmIntrinsics::_getModifiers: do_getModifiers(x); break;
3115 case vmIntrinsics::_getClass: do_getClass(x); break;
3116 case vmIntrinsics::_currentThread: do_currentThread(x); break;
3117 case vmIntrinsics::_getObjectSize: do_getObjectSize(x); break;
3118
3119 case vmIntrinsics::_dlog: // fall through
3120 case vmIntrinsics::_dlog10: // fall through
3121 case vmIntrinsics::_dabs: // fall through
3122 case vmIntrinsics::_dsqrt: // fall through
3123 case vmIntrinsics::_dtan: // fall through
3124 case vmIntrinsics::_dsin : // fall through
3125 case vmIntrinsics::_dcos : // fall through
3126 case vmIntrinsics::_dexp : // fall through
3127 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break;
3128 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
3129
3130 case vmIntrinsics::_fmaD: do_FmaIntrinsic(x); break;
3131 case vmIntrinsics::_fmaF: do_FmaIntrinsic(x); break;
3132
3133 // java.nio.Buffer.checkIndex
3134 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
3135
3136 case vmIntrinsics::_compareAndSetReference:
3137 do_CompareAndSwap(x, objectType);
3138 break;
3139 case vmIntrinsics::_compareAndSetInt:
3140 do_CompareAndSwap(x, intType);
3141 break;
3142 case vmIntrinsics::_compareAndSetLong:
3143 do_CompareAndSwap(x, longType);
3144 break;
3145
3146 case vmIntrinsics::_loadFence :
3147 __ membar_acquire();
3148 break;
3149 case vmIntrinsics::_storeFence:
3150 __ membar_release();
3151 break;
3152 case vmIntrinsics::_storeStoreFence:
3153 __ membar_storestore();
3154 break;
3155 case vmIntrinsics::_fullFence :
3156 __ membar();
3157 break;
3158 case vmIntrinsics::_onSpinWait:
3159 __ on_spin_wait();
3160 break;
3161 case vmIntrinsics::_Reference_get:
3162 do_Reference_get(x);
3163 break;
3164
3165 case vmIntrinsics::_updateCRC32:
3166 case vmIntrinsics::_updateBytesCRC32:
3167 case vmIntrinsics::_updateByteBufferCRC32:
3168 do_update_CRC32(x);
3169 break;
3170
3171 case vmIntrinsics::_updateBytesCRC32C:
3172 case vmIntrinsics::_updateDirectByteBufferCRC32C:
3173 do_update_CRC32C(x);
3174 break;
3175
3176 case vmIntrinsics::_vectorizedMismatch:
3177 do_vectorizedMismatch(x);
3178 break;
3179
3180 case vmIntrinsics::_blackhole:
3181 do_blackhole(x);
3182 break;
3183
3184 default: ShouldNotReachHere(); break;
3185 }
3186 }
3187
3188 void LIRGenerator::profile_arguments(ProfileCall* x) {
3189 if (compilation()->profile_arguments()) {
3190 int bci = x->bci_of_invoke();
3191 ciMethodData* md = x->method()->method_data_or_null();
3192 assert(md != NULL, "Sanity");
3193 ciProfileData* data = md->bci_to_data(bci);
3194 if (data != NULL) {
3195 if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) ||
3196 (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) {
3197 ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset();
3198 int base_offset = md->byte_offset_of_slot(data, extra);
3199 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3200 ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args();
3201
3202 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3203 int start = 0;
3204 int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments();
3205 if (x->callee()->is_loaded() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) {
3206 // first argument is not profiled at call (method handle invoke)
3207 assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected");
3208 start = 1;
3209 }
3210 ciSignature* callee_signature = x->callee()->signature();
3211 // method handle call to virtual method
3212 bool has_receiver = x->callee()->is_loaded() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc);
3213 ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL);
3214
3215 bool ignored_will_link;
3216 ciSignature* signature_at_call = NULL;
3217 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3218 ciSignatureStream signature_at_call_stream(signature_at_call);
3219
3220 // if called through method handle invoke, some arguments may have been popped
3221 for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) {
3222 int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset());
3223 ciKlass* exact = profile_type(md, base_offset, off,
3224 args->type(i), x->profiled_arg_at(i+start), mdp,
3225 !x->arg_needs_null_check(i+start),
3226 signature_at_call_stream.next_klass(), callee_signature_stream.next_klass());
3227 if (exact != NULL) {
3228 md->set_argument_type(bci, i, exact);
3229 }
3230 }
3231 } else {
3232 #ifdef ASSERT
3233 Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke());
3234 int n = x->nb_profiled_args();
3235 assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() ||
3236 (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))),
3237 "only at JSR292 bytecodes");
3238 #endif
3239 }
3240 }
3241 }
3242 }
3243
3244 // profile parameters on entry to an inlined method
3245 void LIRGenerator::profile_parameters_at_call(ProfileCall* x) {
3246 if (compilation()->profile_parameters() && x->inlined()) {
3247 ciMethodData* md = x->callee()->method_data_or_null();
3248 if (md != NULL) {
3249 ciParametersTypeData* parameters_type_data = md->parameters_type_data();
3250 if (parameters_type_data != NULL) {
3251 ciTypeStackSlotEntries* parameters = parameters_type_data->parameters();
3252 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3253 bool has_receiver = !x->callee()->is_static();
3254 ciSignature* sig = x->callee()->signature();
3255 ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL);
3256 int i = 0; // to iterate on the Instructions
3257 Value arg = x->recv();
3258 bool not_null = false;
3259 int bci = x->bci_of_invoke();
3260 Bytecodes::Code bc = x->method()->java_code_at_bci(bci);
3261 // The first parameter is the receiver so that's what we start
3262 // with if it exists. One exception is method handle call to
3263 // virtual method: the receiver is in the args list
3264 if (arg == NULL || !Bytecodes::has_receiver(bc)) {
3265 i = 1;
3266 arg = x->profiled_arg_at(0);
3267 not_null = !x->arg_needs_null_check(0);
3268 }
3269 int k = 0; // to iterate on the profile data
3270 for (;;) {
3271 intptr_t profiled_k = parameters->type(k);
3272 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)),
3273 in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)),
3274 profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL);
3275 // If the profile is known statically set it once for all and do not emit any code
3276 if (exact != NULL) {
3277 md->set_parameter_type(k, exact);
3278 }
3279 k++;
3280 if (k >= parameters_type_data->number_of_parameters()) {
3281 #ifdef ASSERT
3282 int extra = 0;
3283 if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 &&
3284 x->nb_profiled_args() >= TypeProfileParmsLimit &&
3285 x->recv() != NULL && Bytecodes::has_receiver(bc)) {
3286 extra += 1;
3287 }
3288 assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?");
3289 #endif
3290 break;
3291 }
3292 arg = x->profiled_arg_at(i);
3293 not_null = !x->arg_needs_null_check(i);
3294 i++;
3295 }
3296 }
3297 }
3298 }
3299 }
3300
3301 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
3302 // Need recv in a temporary register so it interferes with the other temporaries
3303 LIR_Opr recv = LIR_OprFact::illegalOpr;
3304 LIR_Opr mdo = new_register(T_METADATA);
3305 // tmp is used to hold the counters on SPARC
3306 LIR_Opr tmp = new_pointer_register();
3307
3308 if (x->nb_profiled_args() > 0) {
3309 profile_arguments(x);
3310 }
3311
3312 // profile parameters on inlined method entry including receiver
3313 if (x->recv() != NULL || x->nb_profiled_args() > 0) {
3314 profile_parameters_at_call(x);
3315 }
3316
3317 if (x->recv() != NULL) {
3318 LIRItem value(x->recv(), this);
3319 value.load_item();
3320 recv = new_register(T_OBJECT);
3321 __ move(value.result(), recv);
3322 }
3323 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder());
3324 }
3325
3326 void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) {
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 assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type");
3333 ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret();
3334 LIR_Opr mdp = LIR_OprFact::illegalOpr;
3335
3336 bool ignored_will_link;
3337 ciSignature* signature_at_call = NULL;
3338 x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call);
3339
3340 // The offset within the MDO of the entry to update may be too large
3341 // to be used in load/store instructions on some platforms. So have
3342 // profile_type() compute the address of the profile in a register.
3343 ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0,
3344 ret->type(), x->ret(), mdp,
3345 !x->needs_null_check(),
3346 signature_at_call->return_type()->as_klass(),
3347 x->callee()->signature()->return_type()->as_klass());
3348 if (exact != NULL) {
3349 md->set_return_type(bci, exact);
3350 }
3351 }
3352 }
3353
3354 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) {
3355 // We can safely ignore accessors here, since c2 will inline them anyway,
3356 // accessors are also always mature.
3357 if (!x->inlinee()->is_accessor()) {
3358 CodeEmitInfo* info = state_for(x, x->state(), true);
3359 // Notify the runtime very infrequently only to take care of counter overflows
3360 int freq_log = Tier23InlineeNotifyFreqLog;
3361 double scale;
3362 if (_method->has_option_value(CompileCommand::CompileThresholdScaling, scale)) {
3363 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3364 }
3365 increment_event_counter_impl(info, x->inlinee(), LIR_OprFact::intConst(InvocationCounter::count_increment), right_n_bits(freq_log), InvocationEntryBci, false, true);
3366 }
3367 }
3368
3369 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) {
3370 if (compilation()->count_backedges()) {
3371 #if defined(X86) && !defined(_LP64)
3372 // BEWARE! On 32-bit x86 cmp clobbers its left argument so we need a temp copy.
3373 LIR_Opr left_copy = new_register(left->type());
3374 __ move(left, left_copy);
3375 __ cmp(cond, left_copy, right);
3376 #else
3377 __ cmp(cond, left, right);
3378 #endif
3379 LIR_Opr step = new_register(T_INT);
3380 LIR_Opr plus_one = LIR_OprFact::intConst(InvocationCounter::count_increment);
3381 LIR_Opr zero = LIR_OprFact::intConst(0);
3382 __ cmove(cond,
3383 (left_bci < bci) ? plus_one : zero,
3384 (right_bci < bci) ? plus_one : zero,
3385 step, left->type());
3386 increment_backedge_counter(info, step, bci);
3387 }
3388 }
3389
3390
3391 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, LIR_Opr step, int bci, bool backedge) {
3392 int freq_log = 0;
3393 int level = compilation()->env()->comp_level();
3394 if (level == CompLevel_limited_profile) {
3395 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog);
3396 } else if (level == CompLevel_full_profile) {
3397 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog);
3398 } else {
3399 ShouldNotReachHere();
3400 }
3401 // Increment the appropriate invocation/backedge counter and notify the runtime.
3402 double scale;
3403 if (_method->has_option_value(CompileCommand::CompileThresholdScaling, scale)) {
3404 freq_log = CompilerConfig::scaled_freq_log(freq_log, scale);
3405 }
3406 increment_event_counter_impl(info, info->scope()->method(), step, right_n_bits(freq_log), bci, backedge, true);
3407 }
3408
3409 void LIRGenerator::decrement_age(CodeEmitInfo* info) {
3410 ciMethod* method = info->scope()->method();
3411 MethodCounters* mc_adr = method->ensure_method_counters();
3412 if (mc_adr != NULL) {
3413 LIR_Opr mc = new_pointer_register();
3414 __ move(LIR_OprFact::intptrConst(mc_adr), mc);
3415 int offset = in_bytes(MethodCounters::nmethod_age_offset());
3416 LIR_Address* counter = new LIR_Address(mc, offset, T_INT);
3417 LIR_Opr result = new_register(T_INT);
3418 __ load(counter, result);
3419 __ sub(result, LIR_OprFact::intConst(1), result);
3420 __ store(result, counter);
3421 // DeoptimizeStub will reexecute from the current state in code info.
3422 CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured,
3423 Deoptimization::Action_make_not_entrant);
3424 __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0));
3425 __ branch(lir_cond_lessEqual, deopt);
3426 }
3427 }
3428
3429
3430 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info,
3431 ciMethod *method, LIR_Opr step, int frequency,
3432 int bci, bool backedge, bool notify) {
3433 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0");
3434 int level = _compilation->env()->comp_level();
3435 assert(level > CompLevel_simple, "Shouldn't be here");
3436
3437 int offset = -1;
3438 LIR_Opr counter_holder = NULL;
3439 if (level == CompLevel_limited_profile) {
3440 MethodCounters* counters_adr = method->ensure_method_counters();
3441 if (counters_adr == NULL) {
3442 bailout("method counters allocation failed");
3443 return;
3444 }
3445 counter_holder = new_pointer_register();
3446 __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder);
3447 offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() :
3448 MethodCounters::invocation_counter_offset());
3449 } else if (level == CompLevel_full_profile) {
3450 counter_holder = new_register(T_METADATA);
3451 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() :
3452 MethodData::invocation_counter_offset());
3453 ciMethodData* md = method->method_data_or_null();
3454 assert(md != NULL, "Sanity");
3455 __ metadata2reg(md->constant_encoding(), counter_holder);
3456 } else {
3457 ShouldNotReachHere();
3458 }
3459 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT);
3460 LIR_Opr result = new_register(T_INT);
3461 __ load(counter, result);
3462 __ add(result, step, result);
3463 __ store(result, counter);
3464 if (notify && (!backedge || UseOnStackReplacement)) {
3465 LIR_Opr meth = LIR_OprFact::metadataConst(method->constant_encoding());
3466 // The bci for info can point to cmp for if's we want the if bci
3467 CodeStub* overflow = new CounterOverflowStub(info, bci, meth);
3468 int freq = frequency << InvocationCounter::count_shift;
3469 if (freq == 0) {
3470 if (!step->is_constant()) {
3471 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3472 __ branch(lir_cond_notEqual, overflow);
3473 } else {
3474 __ branch(lir_cond_always, overflow);
3475 }
3476 } else {
3477 LIR_Opr mask = load_immediate(freq, T_INT);
3478 if (!step->is_constant()) {
3479 // If step is 0, make sure the overflow check below always fails
3480 __ cmp(lir_cond_notEqual, step, LIR_OprFact::intConst(0));
3481 __ cmove(lir_cond_notEqual, result, LIR_OprFact::intConst(InvocationCounter::count_increment), result, T_INT);
3482 }
3483 __ logical_and(result, mask, result);
3484 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0));
3485 __ branch(lir_cond_equal, overflow);
3486 }
3487 __ branch_destination(overflow->continuation());
3488 }
3489 }
3490
3491 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
3492 LIR_OprList* args = new LIR_OprList(x->number_of_arguments());
3493 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
3494
3495 if (x->pass_thread()) {
3496 signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread
3497 args->append(getThreadPointer());
3498 }
3499
3500 for (int i = 0; i < x->number_of_arguments(); i++) {
3501 Value a = x->argument_at(i);
3502 LIRItem* item = new LIRItem(a, this);
3503 item->load_item();
3504 args->append(item->result());
3505 signature->append(as_BasicType(a->type()));
3506 }
3507
3508 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL);
3509 if (x->type() == voidType) {
3510 set_no_result(x);
3511 } else {
3512 __ move(result, rlock_result(x));
3513 }
3514 }
3515
3516 #ifdef ASSERT
3517 void LIRGenerator::do_Assert(Assert *x) {
3518 ValueTag tag = x->x()->type()->tag();
3519 If::Condition cond = x->cond();
3520
3521 LIRItem xitem(x->x(), this);
3522 LIRItem yitem(x->y(), this);
3523 LIRItem* xin = &xitem;
3524 LIRItem* yin = &yitem;
3525
3526 assert(tag == intTag, "Only integer assertions are valid!");
3527
3528 xin->load_item();
3529 yin->dont_load_item();
3530
3531 set_no_result(x);
3532
3533 LIR_Opr left = xin->result();
3534 LIR_Opr right = yin->result();
3535
3536 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true);
3537 }
3538 #endif
3539
3540 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) {
3541
3542
3543 Instruction *a = x->x();
3544 Instruction *b = x->y();
3545 if (!a || StressRangeCheckElimination) {
3546 assert(!b || StressRangeCheckElimination, "B must also be null");
3547
3548 CodeEmitInfo *info = state_for(x, x->state());
3549 CodeStub* stub = new PredicateFailedStub(info);
3550
3551 __ jump(stub);
3552 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) {
3553 int a_int = a->type()->as_IntConstant()->value();
3554 int b_int = b->type()->as_IntConstant()->value();
3555
3556 bool ok = false;
3557
3558 switch(x->cond()) {
3559 case Instruction::eql: ok = (a_int == b_int); break;
3560 case Instruction::neq: ok = (a_int != b_int); break;
3561 case Instruction::lss: ok = (a_int < b_int); break;
3562 case Instruction::leq: ok = (a_int <= b_int); break;
3563 case Instruction::gtr: ok = (a_int > b_int); break;
3564 case Instruction::geq: ok = (a_int >= b_int); break;
3565 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break;
3566 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break;
3567 default: ShouldNotReachHere();
3568 }
3569
3570 if (ok) {
3571
3572 CodeEmitInfo *info = state_for(x, x->state());
3573 CodeStub* stub = new PredicateFailedStub(info);
3574
3575 __ jump(stub);
3576 }
3577 } else {
3578
3579 ValueTag tag = x->x()->type()->tag();
3580 If::Condition cond = x->cond();
3581 LIRItem xitem(x->x(), this);
3582 LIRItem yitem(x->y(), this);
3583 LIRItem* xin = &xitem;
3584 LIRItem* yin = &yitem;
3585
3586 assert(tag == intTag, "Only integer deoptimizations are valid!");
3587
3588 xin->load_item();
3589 yin->dont_load_item();
3590 set_no_result(x);
3591
3592 LIR_Opr left = xin->result();
3593 LIR_Opr right = yin->result();
3594
3595 CodeEmitInfo *info = state_for(x, x->state());
3596 CodeStub* stub = new PredicateFailedStub(info);
3597
3598 __ cmp(lir_cond(cond), left, right);
3599 __ branch(lir_cond(cond), stub);
3600 }
3601 }
3602
3603 void LIRGenerator::do_blackhole(Intrinsic *x) {
3604 assert(!x->has_receiver(), "Should have been checked before: only static methods here");
3605 for (int c = 0; c < x->number_of_arguments(); c++) {
3606 // Load the argument
3607 LIRItem vitem(x->argument_at(c), this);
3608 vitem.load_item();
3609 // ...and leave it unused.
3610 }
3611 }
3612
3613 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
3614 LIRItemList args(1);
3615 LIRItem value(arg1, this);
3616 args.append(&value);
3617 BasicTypeList signature;
3618 signature.append(as_BasicType(arg1->type()));
3619
3620 return call_runtime(&signature, &args, entry, result_type, info);
3621 }
3622
3623
3624 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
3625 LIRItemList args(2);
3626 LIRItem value1(arg1, this);
3627 LIRItem value2(arg2, this);
3628 args.append(&value1);
3629 args.append(&value2);
3630 BasicTypeList signature;
3631 signature.append(as_BasicType(arg1->type()));
3632 signature.append(as_BasicType(arg2->type()));
3633
3634 return call_runtime(&signature, &args, entry, result_type, info);
3635 }
3636
3637
3638 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
3639 address entry, ValueType* result_type, CodeEmitInfo* info) {
3640 // get a result register
3641 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3642 LIR_Opr result = LIR_OprFact::illegalOpr;
3643 if (result_type->tag() != voidTag) {
3644 result = new_register(result_type);
3645 phys_reg = result_register_for(result_type);
3646 }
3647
3648 // move the arguments into the correct location
3649 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3650 assert(cc->length() == args->length(), "argument mismatch");
3651 for (int i = 0; i < args->length(); i++) {
3652 LIR_Opr arg = args->at(i);
3653 LIR_Opr loc = cc->at(i);
3654 if (loc->is_register()) {
3655 __ move(arg, loc);
3656 } else {
3657 LIR_Address* addr = loc->as_address_ptr();
3658 // if (!can_store_as_constant(arg)) {
3659 // LIR_Opr tmp = new_register(arg->type());
3660 // __ move(arg, tmp);
3661 // arg = tmp;
3662 // }
3663 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3664 __ unaligned_move(arg, addr);
3665 } else {
3666 __ move(arg, addr);
3667 }
3668 }
3669 }
3670
3671 if (info) {
3672 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3673 } else {
3674 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3675 }
3676 if (result->is_valid()) {
3677 __ move(phys_reg, result);
3678 }
3679 return result;
3680 }
3681
3682
3683 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
3684 address entry, ValueType* result_type, CodeEmitInfo* info) {
3685 // get a result register
3686 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
3687 LIR_Opr result = LIR_OprFact::illegalOpr;
3688 if (result_type->tag() != voidTag) {
3689 result = new_register(result_type);
3690 phys_reg = result_register_for(result_type);
3691 }
3692
3693 // move the arguments into the correct location
3694 CallingConvention* cc = frame_map()->c_calling_convention(signature);
3695
3696 assert(cc->length() == args->length(), "argument mismatch");
3697 for (int i = 0; i < args->length(); i++) {
3698 LIRItem* arg = args->at(i);
3699 LIR_Opr loc = cc->at(i);
3700 if (loc->is_register()) {
3701 arg->load_item_force(loc);
3702 } else {
3703 LIR_Address* addr = loc->as_address_ptr();
3704 arg->load_for_store(addr->type());
3705 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
3706 __ unaligned_move(arg->result(), addr);
3707 } else {
3708 __ move(arg->result(), addr);
3709 }
3710 }
3711 }
3712
3713 if (info) {
3714 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
3715 } else {
3716 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
3717 }
3718 if (result->is_valid()) {
3719 __ move(phys_reg, result);
3720 }
3721 return result;
3722 }
3723
3724 void LIRGenerator::do_MemBar(MemBar* x) {
3725 LIR_Code code = x->code();
3726 switch(code) {
3727 case lir_membar_acquire : __ membar_acquire(); break;
3728 case lir_membar_release : __ membar_release(); break;
3729 case lir_membar : __ membar(); break;
3730 case lir_membar_loadload : __ membar_loadload(); break;
3731 case lir_membar_storestore: __ membar_storestore(); break;
3732 case lir_membar_loadstore : __ membar_loadstore(); break;
3733 case lir_membar_storeload : __ membar_storeload(); break;
3734 default : ShouldNotReachHere(); break;
3735 }
3736 }
3737
3738 LIR_Opr LIRGenerator::mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3739 LIR_Opr value_fixed = rlock_byte(T_BYTE);
3740 if (TwoOperandLIRForm) {
3741 __ move(value, value_fixed);
3742 __ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
3743 } else {
3744 __ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
3745 }
3746 LIR_Opr klass = new_register(T_METADATA);
3747 __ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
3748 null_check_info = NULL;
3749 LIR_Opr layout = new_register(T_INT);
3750 __ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
3751 int diffbit = Klass::layout_helper_boolean_diffbit();
3752 __ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
3753 __ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
3754 __ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
3755 value = value_fixed;
3756 return value;
3757 }
3758
3759 LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
3760 if (x->check_boolean()) {
3761 value = mask_boolean(array, value, null_check_info);
3762 }
3763 return value;
3764 }
--- EOF ---