1 /*
2 * Copyright (c) 2005, 2021, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "c1/c1_Compilation.hpp"
29 #include "c1/c1_FrameMap.hpp"
30 #include "c1/c1_Instruction.hpp"
31 #include "c1/c1_LIRAssembler.hpp"
32 #include "c1/c1_LIRGenerator.hpp"
33 #include "c1/c1_Runtime1.hpp"
34 #include "c1/c1_ValueStack.hpp"
35 #include "ci/ciArray.hpp"
36 #include "ci/ciInlineKlass.hpp"
37 #include "ci/ciObjArrayKlass.hpp"
38 #include "ci/ciTypeArrayKlass.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "utilities/powerOfTwo.hpp"
42 #include "vmreg_aarch64.inline.hpp"
43
44 #ifdef ASSERT
45 #define __ gen()->lir(__FILE__, __LINE__)->
46 #else
47 #define __ gen()->lir()->
48 #endif
49
50 // Item will be loaded into a byte register; Intel only
51 void LIRItem::load_byte_item() {
52 load_item();
53 }
54
55
56 void LIRItem::load_nonconstant() {
57 LIR_Opr r = value()->operand();
58 if (r->is_constant()) {
59 _result = r;
60 } else {
61 load_item();
62 }
63 }
64
65 //--------------------------------------------------------------
66 // LIRGenerator
67 //--------------------------------------------------------------
68
69
70 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::r0_oop_opr; }
71 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::r3_opr; }
72 LIR_Opr LIRGenerator::divInOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
73 LIR_Opr LIRGenerator::divOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
74 LIR_Opr LIRGenerator::remOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
75 LIR_Opr LIRGenerator::shiftCountOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
76 LIR_Opr LIRGenerator::syncLockOpr() { return new_register(T_INT); }
77 LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::r0_opr; }
78 LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; }
79
80
81 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
82 LIR_Opr opr;
83 switch (type->tag()) {
84 case intTag: opr = FrameMap::r0_opr; break;
85 case objectTag: opr = FrameMap::r0_oop_opr; break;
86 case longTag: opr = FrameMap::long0_opr; break;
87 case floatTag: opr = FrameMap::fpu0_float_opr; break;
88 case doubleTag: opr = FrameMap::fpu0_double_opr; break;
89
90 case addressTag:
91 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
92 }
93
94 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
95 return opr;
96 }
97
98
99 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
100 LIR_Opr reg = new_register(T_INT);
101 set_vreg_flag(reg, LIRGenerator::byte_reg);
102 return reg;
103 }
104
105
106 void LIRGenerator::init_temps_for_substitutability_check(LIR_Opr& tmp1, LIR_Opr& tmp2) {
107 tmp1 = new_register(T_INT);
108 tmp2 = LIR_OprFact::illegalOpr;
109 }
110
111
112 //--------- loading items into registers --------------------------------
113
114
115 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
116 if (v->type()->as_IntConstant() != NULL) {
117 return v->type()->as_IntConstant()->value() == 0L;
118 } else if (v->type()->as_LongConstant() != NULL) {
119 return v->type()->as_LongConstant()->value() == 0L;
120 } else if (v->type()->as_ObjectConstant() != NULL) {
121 return v->type()->as_ObjectConstant()->value()->is_null_object();
122 } else {
123 return false;
124 }
125 }
126
127 bool LIRGenerator::can_inline_as_constant(Value v) const {
128 // FIXME: Just a guess
129 if (v->type()->as_IntConstant() != NULL) {
130 return Assembler::operand_valid_for_add_sub_immediate(v->type()->as_IntConstant()->value());
131 } else if (v->type()->as_LongConstant() != NULL) {
132 return v->type()->as_LongConstant()->value() == 0L;
133 } else if (v->type()->as_ObjectConstant() != NULL) {
134 return v->type()->as_ObjectConstant()->value()->is_null_object();
135 } else {
136 return false;
137 }
138 }
139
140
141 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const { return false; }
142
143
144 LIR_Opr LIRGenerator::safepoint_poll_register() {
145 return LIR_OprFact::illegalOpr;
146 }
147
148
149 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
150 int shift, int disp, BasicType type) {
151 assert(base->is_register(), "must be");
152 intx large_disp = disp;
153
154 // accumulate fixed displacements
155 if (index->is_constant()) {
156 LIR_Const *constant = index->as_constant_ptr();
157 if (constant->type() == T_INT) {
158 large_disp += ((intx)index->as_jint()) << shift;
159 } else {
160 assert(constant->type() == T_LONG, "should be");
161 jlong c = index->as_jlong() << shift;
162 if ((jlong)((jint)c) == c) {
163 large_disp += c;
164 index = LIR_OprFact::illegalOpr;
165 } else {
166 LIR_Opr tmp = new_register(T_LONG);
167 __ move(index, tmp);
168 index = tmp;
169 // apply shift and displacement below
170 }
171 }
172 }
173
174 if (index->is_register()) {
175 // apply the shift and accumulate the displacement
176 if (shift > 0) {
177 LIR_Opr tmp = new_pointer_register();
178 __ shift_left(index, shift, tmp);
179 index = tmp;
180 }
181 if (large_disp != 0) {
182 LIR_Opr tmp = new_pointer_register();
183 if (Assembler::operand_valid_for_add_sub_immediate(large_disp)) {
184 __ add(index, LIR_OprFact::intptrConst(large_disp), tmp);
185 index = tmp;
186 } else {
187 __ move(LIR_OprFact::intptrConst(large_disp), tmp);
188 __ add(tmp, index, tmp);
189 index = tmp;
190 }
191 large_disp = 0;
192 }
193 } else if (large_disp != 0 && !Address::offset_ok_for_immed(large_disp, shift)) {
194 // index is illegal so replace it with the displacement loaded into a register
195 index = new_pointer_register();
196 __ move(LIR_OprFact::intptrConst(large_disp), index);
197 large_disp = 0;
198 }
199
200 // at this point we either have base + index or base + displacement
201 if (large_disp == 0 && index->is_register()) {
202 return new LIR_Address(base, index, type);
203 } else {
204 assert(Address::offset_ok_for_immed(large_disp, shift), "failed for large_disp: " INTPTR_FORMAT " and shift %d", large_disp, shift);
205 return new LIR_Address(base, large_disp, type);
206 }
207 }
208
209 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
210 BasicType type) {
211 int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type);
212 int elem_size = type2aelembytes(type);
213 int shift = exact_log2(elem_size);
214 return generate_address(array_opr, index_opr, shift, offset_in_bytes, type);
215 }
216
217 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
218 LIR_Opr r;
219 if (type == T_LONG) {
220 r = LIR_OprFact::longConst(x);
221 if (!Assembler::operand_valid_for_logical_immediate(false, x)) {
222 LIR_Opr tmp = new_register(type);
223 __ move(r, tmp);
224 return tmp;
225 }
226 } else if (type == T_INT) {
227 r = LIR_OprFact::intConst(x);
228 if (!Assembler::operand_valid_for_logical_immediate(true, x)) {
229 // This is all rather nasty. We don't know whether our constant
230 // is required for a logical or an arithmetic operation, wo we
231 // don't know what the range of valid values is!!
232 LIR_Opr tmp = new_register(type);
233 __ move(r, tmp);
234 return tmp;
235 }
236 } else {
237 ShouldNotReachHere();
238 }
239 return r;
240 }
241
242
243
244 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
245 LIR_Opr pointer = new_pointer_register();
246 __ move(LIR_OprFact::intptrConst(counter), pointer);
247 LIR_Address* addr = new LIR_Address(pointer, type);
248 increment_counter(addr, step);
249 }
250
251
252 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
253 LIR_Opr imm;
254 switch(addr->type()) {
255 case T_INT:
256 imm = LIR_OprFact::intConst(step);
257 break;
258 case T_LONG:
259 imm = LIR_OprFact::longConst(step);
260 break;
261 default:
262 ShouldNotReachHere();
263 }
264 LIR_Opr reg = new_register(addr->type());
265 __ load(addr, reg);
266 __ add(reg, imm, reg);
267 __ store(reg, addr);
268 }
269
270 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
271 LIR_Opr reg = new_register(T_INT);
272 __ load(generate_address(base, disp, T_INT), reg, info);
273 __ cmp(condition, reg, LIR_OprFact::intConst(c));
274 }
275
276 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
277 LIR_Opr reg1 = new_register(T_INT);
278 __ load(generate_address(base, disp, type), reg1, info);
279 __ cmp(condition, reg, reg1);
280 }
281
282
283 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, jint c, LIR_Opr result, LIR_Opr tmp) {
284
285 if (is_power_of_2(c - 1)) {
286 __ shift_left(left, exact_log2(c - 1), tmp);
287 __ add(tmp, left, result);
288 return true;
289 } else if (is_power_of_2(c + 1)) {
290 __ shift_left(left, exact_log2(c + 1), tmp);
291 __ sub(tmp, left, result);
292 return true;
293 } else {
294 return false;
295 }
296 }
297
298 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
299 BasicType type = item->type();
300 __ store(item, new LIR_Address(FrameMap::sp_opr, in_bytes(offset_from_sp), type));
301 }
302
303 void LIRGenerator::array_store_check(LIR_Opr value, LIR_Opr array, CodeEmitInfo* store_check_info, ciMethod* profiled_method, int profiled_bci) {
304 LIR_Opr tmp1 = new_register(objectType);
305 LIR_Opr tmp2 = new_register(objectType);
306 LIR_Opr tmp3 = new_register(objectType);
307 __ store_check(value, array, tmp1, tmp2, tmp3, store_check_info, profiled_method, profiled_bci);
308 }
309
310 //----------------------------------------------------------------------
311 // visitor functions
312 //----------------------------------------------------------------------
313
314 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
315 assert(x->is_pinned(),"");
316 LIRItem obj(x->obj(), this);
317 obj.load_item();
318
319 set_no_result(x);
320
321 // "lock" stores the address of the monitor stack slot, so this is not an oop
322 LIR_Opr lock = new_register(T_INT);
323 // Need a scratch register for inline type
324 LIR_Opr scratch = LIR_OprFact::illegalOpr;
325 if (EnableValhalla && x->maybe_inlinetype()) {
326 scratch = new_register(T_INT);
327 }
328
329 CodeEmitInfo* info_for_exception = NULL;
330 if (x->needs_null_check()) {
331 info_for_exception = state_for(x);
332 }
333
334 CodeStub* throw_imse_stub =
335 x->maybe_inlinetype() ?
336 new SimpleExceptionStub(Runtime1::throw_illegal_monitor_state_exception_id, LIR_OprFact::illegalOpr, state_for(x)) :
337 NULL;
338
339 // this CodeEmitInfo must not have the xhandlers because here the
340 // object is already locked (xhandlers expect object to be unlocked)
341 CodeEmitInfo* info = state_for(x, x->state(), true);
342 monitor_enter(obj.result(), lock, syncTempOpr(), scratch,
343 x->monitor_no(), info_for_exception, info, throw_imse_stub);
344 }
345
346
347 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
348 assert(x->is_pinned(),"");
349
350 LIRItem obj(x->obj(), this);
351 obj.dont_load_item();
352
353 LIR_Opr lock = new_register(T_INT);
354 LIR_Opr obj_temp = new_register(T_INT);
355 set_no_result(x);
356 monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
357 }
358
359
360 void LIRGenerator::do_NegateOp(NegateOp* x) {
361
362 LIRItem from(x->x(), this);
363 from.load_item();
364 LIR_Opr result = rlock_result(x);
365 __ negate (from.result(), result);
366
367 }
368
369 // for _fadd, _fmul, _fsub, _fdiv, _frem
370 // _dadd, _dmul, _dsub, _ddiv, _drem
371 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
372
373 if (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem) {
374 // float remainder is implemented as a direct call into the runtime
375 LIRItem right(x->x(), this);
376 LIRItem left(x->y(), this);
377
378 BasicTypeList signature(2);
379 if (x->op() == Bytecodes::_frem) {
380 signature.append(T_FLOAT);
381 signature.append(T_FLOAT);
382 } else {
383 signature.append(T_DOUBLE);
384 signature.append(T_DOUBLE);
385 }
386 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
387
388 const LIR_Opr result_reg = result_register_for(x->type());
389 left.load_item_force(cc->at(1));
390 right.load_item();
391
392 __ move(right.result(), cc->at(0));
393
394 address entry;
395 if (x->op() == Bytecodes::_frem) {
396 entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem);
397 } else {
398 entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem);
399 }
400
401 LIR_Opr result = rlock_result(x);
402 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args());
403 __ move(result_reg, result);
404
405 return;
406 }
407
408 LIRItem left(x->x(), this);
409 LIRItem right(x->y(), this);
410 LIRItem* left_arg = &left;
411 LIRItem* right_arg = &right;
412
413 // Always load right hand side.
414 right.load_item();
415
416 if (!left.is_register())
417 left.load_item();
418
419 LIR_Opr reg = rlock(x);
420
421 arithmetic_op_fpu(x->op(), reg, left.result(), right.result());
422
423 set_result(x, round_item(reg));
424 }
425
426 // for _ladd, _lmul, _lsub, _ldiv, _lrem
427 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
428
429 // missing test if instr is commutative and if we should swap
430 LIRItem left(x->x(), this);
431 LIRItem right(x->y(), this);
432
433 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
434
435 left.load_item();
436 bool need_zero_check = true;
437 if (right.is_constant()) {
438 jlong c = right.get_jlong_constant();
439 // no need to do div-by-zero check if the divisor is a non-zero constant
440 if (c != 0) need_zero_check = false;
441 // do not load right if the divisor is a power-of-2 constant
442 if (c > 0 && is_power_of_2(c)) {
443 right.dont_load_item();
444 } else {
445 right.load_item();
446 }
447 } else {
448 right.load_item();
449 }
450 if (need_zero_check) {
451 CodeEmitInfo* info = state_for(x);
452 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0));
453 __ branch(lir_cond_equal, new DivByZeroStub(info));
454 }
455
456 rlock_result(x);
457 switch (x->op()) {
458 case Bytecodes::_lrem:
459 __ rem (left.result(), right.result(), x->operand());
460 break;
461 case Bytecodes::_ldiv:
462 __ div (left.result(), right.result(), x->operand());
463 break;
464 default:
465 ShouldNotReachHere();
466 break;
467 }
468
469
470 } else {
471 assert (x->op() == Bytecodes::_lmul || x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub,
472 "expect lmul, ladd or lsub");
473 // add, sub, mul
474 left.load_item();
475 if (! right.is_register()) {
476 if (x->op() == Bytecodes::_lmul
477 || ! right.is_constant()
478 || ! Assembler::operand_valid_for_add_sub_immediate(right.get_jlong_constant())) {
479 right.load_item();
480 } else { // add, sub
481 assert (x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub, "expect ladd or lsub");
482 // don't load constants to save register
483 right.load_nonconstant();
484 }
485 }
486 rlock_result(x);
487 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
488 }
489 }
490
491 // for: _iadd, _imul, _isub, _idiv, _irem
492 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
493
494 // Test if instr is commutative and if we should swap
495 LIRItem left(x->x(), this);
496 LIRItem right(x->y(), this);
497 LIRItem* left_arg = &left;
498 LIRItem* right_arg = &right;
499 if (x->is_commutative() && left.is_stack() && right.is_register()) {
500 // swap them if left is real stack (or cached) and right is real register(not cached)
501 left_arg = &right;
502 right_arg = &left;
503 }
504
505 left_arg->load_item();
506
507 // do not need to load right, as we can handle stack and constants
508 if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) {
509
510 rlock_result(x);
511 bool need_zero_check = true;
512 if (right.is_constant()) {
513 jint c = right.get_jint_constant();
514 // no need to do div-by-zero check if the divisor is a non-zero constant
515 if (c != 0) need_zero_check = false;
516 // do not load right if the divisor is a power-of-2 constant
517 if (c > 0 && is_power_of_2(c)) {
518 right_arg->dont_load_item();
519 } else {
520 right_arg->load_item();
521 }
522 } else {
523 right_arg->load_item();
524 }
525 if (need_zero_check) {
526 CodeEmitInfo* info = state_for(x);
527 __ cmp(lir_cond_equal, right_arg->result(), LIR_OprFact::longConst(0));
528 __ branch(lir_cond_equal, new DivByZeroStub(info));
529 }
530
531 LIR_Opr ill = LIR_OprFact::illegalOpr;
532 if (x->op() == Bytecodes::_irem) {
533 __ irem(left_arg->result(), right_arg->result(), x->operand(), ill, NULL);
534 } else if (x->op() == Bytecodes::_idiv) {
535 __ idiv(left_arg->result(), right_arg->result(), x->operand(), ill, NULL);
536 }
537
538 } else if (x->op() == Bytecodes::_iadd || x->op() == Bytecodes::_isub) {
539 if (right.is_constant()
540 && Assembler::operand_valid_for_add_sub_immediate(right.get_jint_constant())) {
541 right.load_nonconstant();
542 } else {
543 right.load_item();
544 }
545 rlock_result(x);
546 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), LIR_OprFact::illegalOpr);
547 } else {
548 assert (x->op() == Bytecodes::_imul, "expect imul");
549 if (right.is_constant()) {
550 jint c = right.get_jint_constant();
551 if (c > 0 && c < max_jint && (is_power_of_2(c) || is_power_of_2(c - 1) || is_power_of_2(c + 1))) {
552 right_arg->dont_load_item();
553 } else {
554 // Cannot use constant op.
555 right_arg->load_item();
556 }
557 } else {
558 right.load_item();
559 }
560 rlock_result(x);
561 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), new_register(T_INT));
562 }
563 }
564
565 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
566 // when an operand with use count 1 is the left operand, then it is
567 // likely that no move for 2-operand-LIR-form is necessary
568 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
569 x->swap_operands();
570 }
571
572 ValueTag tag = x->type()->tag();
573 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
574 switch (tag) {
575 case floatTag:
576 case doubleTag: do_ArithmeticOp_FPU(x); return;
577 case longTag: do_ArithmeticOp_Long(x); return;
578 case intTag: do_ArithmeticOp_Int(x); return;
579 default: ShouldNotReachHere(); return;
580 }
581 }
582
583 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
584 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
585
586 LIRItem left(x->x(), this);
587 LIRItem right(x->y(), this);
588
589 left.load_item();
590
591 rlock_result(x);
592 if (right.is_constant()) {
593 right.dont_load_item();
594
595 switch (x->op()) {
596 case Bytecodes::_ishl: {
597 int c = right.get_jint_constant() & 0x1f;
598 __ shift_left(left.result(), c, x->operand());
599 break;
600 }
601 case Bytecodes::_ishr: {
602 int c = right.get_jint_constant() & 0x1f;
603 __ shift_right(left.result(), c, x->operand());
604 break;
605 }
606 case Bytecodes::_iushr: {
607 int c = right.get_jint_constant() & 0x1f;
608 __ unsigned_shift_right(left.result(), c, x->operand());
609 break;
610 }
611 case Bytecodes::_lshl: {
612 int c = right.get_jint_constant() & 0x3f;
613 __ shift_left(left.result(), c, x->operand());
614 break;
615 }
616 case Bytecodes::_lshr: {
617 int c = right.get_jint_constant() & 0x3f;
618 __ shift_right(left.result(), c, x->operand());
619 break;
620 }
621 case Bytecodes::_lushr: {
622 int c = right.get_jint_constant() & 0x3f;
623 __ unsigned_shift_right(left.result(), c, x->operand());
624 break;
625 }
626 default:
627 ShouldNotReachHere();
628 }
629 } else {
630 right.load_item();
631 LIR_Opr tmp = new_register(T_INT);
632 switch (x->op()) {
633 case Bytecodes::_ishl: {
634 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
635 __ shift_left(left.result(), tmp, x->operand(), tmp);
636 break;
637 }
638 case Bytecodes::_ishr: {
639 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
640 __ shift_right(left.result(), tmp, x->operand(), tmp);
641 break;
642 }
643 case Bytecodes::_iushr: {
644 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
645 __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp);
646 break;
647 }
648 case Bytecodes::_lshl: {
649 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
650 __ shift_left(left.result(), tmp, x->operand(), tmp);
651 break;
652 }
653 case Bytecodes::_lshr: {
654 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
655 __ shift_right(left.result(), tmp, x->operand(), tmp);
656 break;
657 }
658 case Bytecodes::_lushr: {
659 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
660 __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp);
661 break;
662 }
663 default:
664 ShouldNotReachHere();
665 }
666 }
667 }
668
669 // _iand, _land, _ior, _lor, _ixor, _lxor
670 void LIRGenerator::do_LogicOp(LogicOp* x) {
671
672 LIRItem left(x->x(), this);
673 LIRItem right(x->y(), this);
674
675 left.load_item();
676
677 rlock_result(x);
678 if (right.is_constant()
679 && ((right.type()->tag() == intTag
680 && Assembler::operand_valid_for_logical_immediate(true, right.get_jint_constant()))
681 || (right.type()->tag() == longTag
682 && Assembler::operand_valid_for_logical_immediate(false, right.get_jlong_constant())))) {
683 right.dont_load_item();
684 } else {
685 right.load_item();
686 }
687 switch (x->op()) {
688 case Bytecodes::_iand:
689 case Bytecodes::_land:
690 __ logical_and(left.result(), right.result(), x->operand()); break;
691 case Bytecodes::_ior:
692 case Bytecodes::_lor:
693 __ logical_or (left.result(), right.result(), x->operand()); break;
694 case Bytecodes::_ixor:
695 case Bytecodes::_lxor:
696 __ logical_xor(left.result(), right.result(), x->operand()); break;
697 default: Unimplemented();
698 }
699 }
700
701 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
702 void LIRGenerator::do_CompareOp(CompareOp* x) {
703 LIRItem left(x->x(), this);
704 LIRItem right(x->y(), this);
705 ValueTag tag = x->x()->type()->tag();
706 if (tag == longTag) {
707 left.set_destroys_register();
708 }
709 left.load_item();
710 right.load_item();
711 LIR_Opr reg = rlock_result(x);
712
713 if (x->x()->type()->is_float_kind()) {
714 Bytecodes::Code code = x->op();
715 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
716 } else if (x->x()->type()->tag() == longTag) {
717 __ lcmp2int(left.result(), right.result(), reg);
718 } else {
719 Unimplemented();
720 }
721 }
722
723 LIR_Opr LIRGenerator::atomic_cmpxchg(BasicType type, LIR_Opr addr, LIRItem& cmp_value, LIRItem& new_value) {
724 LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience
725 new_value.load_item();
726 cmp_value.load_item();
727 LIR_Opr result = new_register(T_INT);
728 if (is_reference_type(type)) {
729 __ cas_obj(addr, cmp_value.result(), new_value.result(), new_register(T_INT), new_register(T_INT), result);
730 } else if (type == T_INT) {
731 __ cas_int(addr->as_address_ptr()->base(), cmp_value.result(), new_value.result(), ill, ill);
732 } else if (type == T_LONG) {
733 __ cas_long(addr->as_address_ptr()->base(), cmp_value.result(), new_value.result(), ill, ill);
734 } else {
735 ShouldNotReachHere();
736 Unimplemented();
737 }
738 __ logical_xor(FrameMap::r8_opr, LIR_OprFact::intConst(1), result);
739 return result;
740 }
741
742 LIR_Opr LIRGenerator::atomic_xchg(BasicType type, LIR_Opr addr, LIRItem& value) {
743 bool is_oop = is_reference_type(type);
744 LIR_Opr result = new_register(type);
745 value.load_item();
746 assert(type == T_INT || is_oop LP64_ONLY( || type == T_LONG ), "unexpected type");
747 LIR_Opr tmp = new_register(T_INT);
748 __ xchg(addr, value.result(), result, tmp);
749 return result;
750 }
751
752 LIR_Opr LIRGenerator::atomic_add(BasicType type, LIR_Opr addr, LIRItem& value) {
753 LIR_Opr result = new_register(type);
754 value.load_item();
755 assert(type == T_INT LP64_ONLY( || type == T_LONG ), "unexpected type");
756 LIR_Opr tmp = new_register(T_INT);
757 __ xadd(addr, value.result(), result, tmp);
758 return result;
759 }
760
761 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
762 assert(x->number_of_arguments() == 1 || (x->number_of_arguments() == 2 && x->id() == vmIntrinsics::_dpow), "wrong type");
763 if (x->id() == vmIntrinsics::_dexp || x->id() == vmIntrinsics::_dlog ||
764 x->id() == vmIntrinsics::_dpow || x->id() == vmIntrinsics::_dcos ||
765 x->id() == vmIntrinsics::_dsin || x->id() == vmIntrinsics::_dtan ||
766 x->id() == vmIntrinsics::_dlog10) {
767 do_LibmIntrinsic(x);
768 return;
769 }
770 switch (x->id()) {
771 case vmIntrinsics::_dabs:
772 case vmIntrinsics::_dsqrt:
773 case vmIntrinsics::_dsqrt_strict: {
774 assert(x->number_of_arguments() == 1, "wrong type");
775 LIRItem value(x->argument_at(0), this);
776 value.load_item();
777 LIR_Opr dst = rlock_result(x);
778
779 switch (x->id()) {
780 case vmIntrinsics::_dsqrt:
781 case vmIntrinsics::_dsqrt_strict: {
782 __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
783 break;
784 }
785 case vmIntrinsics::_dabs: {
786 __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
787 break;
788 }
789 default:
790 ShouldNotReachHere();
791 }
792 break;
793 }
794 default:
795 ShouldNotReachHere();
796 }
797 }
798
799 void LIRGenerator::do_LibmIntrinsic(Intrinsic* x) {
800 LIRItem value(x->argument_at(0), this);
801 value.set_destroys_register();
802
803 LIR_Opr calc_result = rlock_result(x);
804 LIR_Opr result_reg = result_register_for(x->type());
805
806 CallingConvention* cc = NULL;
807
808 if (x->id() == vmIntrinsics::_dpow) {
809 LIRItem value1(x->argument_at(1), this);
810
811 value1.set_destroys_register();
812
813 BasicTypeList signature(2);
814 signature.append(T_DOUBLE);
815 signature.append(T_DOUBLE);
816 cc = frame_map()->c_calling_convention(&signature);
817 value.load_item_force(cc->at(0));
818 value1.load_item_force(cc->at(1));
819 } else {
820 BasicTypeList signature(1);
821 signature.append(T_DOUBLE);
822 cc = frame_map()->c_calling_convention(&signature);
823 value.load_item_force(cc->at(0));
824 }
825
826 switch (x->id()) {
827 case vmIntrinsics::_dexp:
828 if (StubRoutines::dexp() != NULL) {
829 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
830 } else {
831 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args());
832 }
833 break;
834 case vmIntrinsics::_dlog:
835 if (StubRoutines::dlog() != NULL) {
836 __ call_runtime_leaf(StubRoutines::dlog(), getThreadTemp(), result_reg, cc->args());
837 } else {
838 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog), getThreadTemp(), result_reg, cc->args());
839 }
840 break;
841 case vmIntrinsics::_dlog10:
842 if (StubRoutines::dlog10() != NULL) {
843 __ call_runtime_leaf(StubRoutines::dlog10(), getThreadTemp(), result_reg, cc->args());
844 } else {
845 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), getThreadTemp(), result_reg, cc->args());
846 }
847 break;
848 case vmIntrinsics::_dpow:
849 if (StubRoutines::dpow() != NULL) {
850 __ call_runtime_leaf(StubRoutines::dpow(), getThreadTemp(), result_reg, cc->args());
851 } else {
852 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dpow), getThreadTemp(), result_reg, cc->args());
853 }
854 break;
855 case vmIntrinsics::_dsin:
856 if (StubRoutines::dsin() != NULL) {
857 __ call_runtime_leaf(StubRoutines::dsin(), getThreadTemp(), result_reg, cc->args());
858 } else {
859 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), getThreadTemp(), result_reg, cc->args());
860 }
861 break;
862 case vmIntrinsics::_dcos:
863 if (StubRoutines::dcos() != NULL) {
864 __ call_runtime_leaf(StubRoutines::dcos(), getThreadTemp(), result_reg, cc->args());
865 } else {
866 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), getThreadTemp(), result_reg, cc->args());
867 }
868 break;
869 case vmIntrinsics::_dtan:
870 if (StubRoutines::dtan() != NULL) {
871 __ call_runtime_leaf(StubRoutines::dtan(), getThreadTemp(), result_reg, cc->args());
872 } else {
873 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), getThreadTemp(), result_reg, cc->args());
874 }
875 break;
876 default: ShouldNotReachHere();
877 }
878 __ move(result_reg, calc_result);
879 }
880
881
882 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
883 assert(x->number_of_arguments() == 5, "wrong type");
884
885 // Make all state_for calls early since they can emit code
886 CodeEmitInfo* info = state_for(x, x->state());
887
888 LIRItem src(x->argument_at(0), this);
889 LIRItem src_pos(x->argument_at(1), this);
890 LIRItem dst(x->argument_at(2), this);
891 LIRItem dst_pos(x->argument_at(3), this);
892 LIRItem length(x->argument_at(4), this);
893
894 // operands for arraycopy must use fixed registers, otherwise
895 // LinearScan will fail allocation (because arraycopy always needs a
896 // call)
897
898 // The java calling convention will give us enough registers
899 // so that on the stub side the args will be perfect already.
900 // On the other slow/special case side we call C and the arg
901 // positions are not similar enough to pick one as the best.
902 // Also because the java calling convention is a "shifted" version
903 // of the C convention we can process the java args trivially into C
904 // args without worry of overwriting during the xfer
905
906 src.load_item_force (FrameMap::as_oop_opr(j_rarg0));
907 src_pos.load_item_force (FrameMap::as_opr(j_rarg1));
908 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2));
909 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3));
910 length.load_item_force (FrameMap::as_opr(j_rarg4));
911
912 LIR_Opr tmp = FrameMap::as_opr(j_rarg5);
913
914 set_no_result(x);
915
916 int flags;
917 ciArrayKlass* expected_type;
918 arraycopy_helper(x, &flags, &expected_type);
919
920 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint
921 }
922
923 void LIRGenerator::do_update_CRC32(Intrinsic* x) {
924 assert(UseCRC32Intrinsics, "why are we here?");
925 // Make all state_for calls early since they can emit code
926 LIR_Opr result = rlock_result(x);
927 int flags = 0;
928 switch (x->id()) {
929 case vmIntrinsics::_updateCRC32: {
930 LIRItem crc(x->argument_at(0), this);
931 LIRItem val(x->argument_at(1), this);
932 // val is destroyed by update_crc32
933 val.set_destroys_register();
934 crc.load_item();
935 val.load_item();
936 __ update_crc32(crc.result(), val.result(), result);
937 break;
938 }
939 case vmIntrinsics::_updateBytesCRC32:
940 case vmIntrinsics::_updateByteBufferCRC32: {
941 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32);
942
943 LIRItem crc(x->argument_at(0), this);
944 LIRItem buf(x->argument_at(1), this);
945 LIRItem off(x->argument_at(2), this);
946 LIRItem len(x->argument_at(3), this);
947 buf.load_item();
948 off.load_nonconstant();
949
950 LIR_Opr index = off.result();
951 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0;
952 if(off.result()->is_constant()) {
953 index = LIR_OprFact::illegalOpr;
954 offset += off.result()->as_jint();
955 }
956 LIR_Opr base_op = buf.result();
957
958 if (index->is_valid()) {
959 LIR_Opr tmp = new_register(T_LONG);
960 __ convert(Bytecodes::_i2l, index, tmp);
961 index = tmp;
962 }
963
964 if (offset) {
965 LIR_Opr tmp = new_pointer_register();
966 __ add(base_op, LIR_OprFact::intConst(offset), tmp);
967 base_op = tmp;
968 offset = 0;
969 }
970
971 LIR_Address* a = new LIR_Address(base_op,
972 index,
973 offset,
974 T_BYTE);
975 BasicTypeList signature(3);
976 signature.append(T_INT);
977 signature.append(T_ADDRESS);
978 signature.append(T_INT);
979 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
980 const LIR_Opr result_reg = result_register_for(x->type());
981
982 LIR_Opr addr = new_pointer_register();
983 __ leal(LIR_OprFact::address(a), addr);
984
985 crc.load_item_force(cc->at(0));
986 __ move(addr, cc->at(1));
987 len.load_item_force(cc->at(2));
988
989 __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args());
990 __ move(result_reg, result);
991
992 break;
993 }
994 default: {
995 ShouldNotReachHere();
996 }
997 }
998 }
999
1000 void LIRGenerator::do_update_CRC32C(Intrinsic* x) {
1001 assert(UseCRC32CIntrinsics, "why are we here?");
1002 // Make all state_for calls early since they can emit code
1003 LIR_Opr result = rlock_result(x);
1004 int flags = 0;
1005 switch (x->id()) {
1006 case vmIntrinsics::_updateBytesCRC32C:
1007 case vmIntrinsics::_updateDirectByteBufferCRC32C: {
1008 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32C);
1009 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0;
1010
1011 LIRItem crc(x->argument_at(0), this);
1012 LIRItem buf(x->argument_at(1), this);
1013 LIRItem off(x->argument_at(2), this);
1014 LIRItem end(x->argument_at(3), this);
1015
1016 buf.load_item();
1017 off.load_nonconstant();
1018 end.load_nonconstant();
1019
1020 // len = end - off
1021 LIR_Opr len = end.result();
1022 LIR_Opr tmpA = new_register(T_INT);
1023 LIR_Opr tmpB = new_register(T_INT);
1024 __ move(end.result(), tmpA);
1025 __ move(off.result(), tmpB);
1026 __ sub(tmpA, tmpB, tmpA);
1027 len = tmpA;
1028
1029 LIR_Opr index = off.result();
1030 if(off.result()->is_constant()) {
1031 index = LIR_OprFact::illegalOpr;
1032 offset += off.result()->as_jint();
1033 }
1034 LIR_Opr base_op = buf.result();
1035
1036 if (index->is_valid()) {
1037 LIR_Opr tmp = new_register(T_LONG);
1038 __ convert(Bytecodes::_i2l, index, tmp);
1039 index = tmp;
1040 }
1041
1042 if (offset) {
1043 LIR_Opr tmp = new_pointer_register();
1044 __ add(base_op, LIR_OprFact::intConst(offset), tmp);
1045 base_op = tmp;
1046 offset = 0;
1047 }
1048
1049 LIR_Address* a = new LIR_Address(base_op,
1050 index,
1051 offset,
1052 T_BYTE);
1053 BasicTypeList signature(3);
1054 signature.append(T_INT);
1055 signature.append(T_ADDRESS);
1056 signature.append(T_INT);
1057 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
1058 const LIR_Opr result_reg = result_register_for(x->type());
1059
1060 LIR_Opr addr = new_pointer_register();
1061 __ leal(LIR_OprFact::address(a), addr);
1062
1063 crc.load_item_force(cc->at(0));
1064 __ move(addr, cc->at(1));
1065 __ move(len, cc->at(2));
1066
1067 __ call_runtime_leaf(StubRoutines::updateBytesCRC32C(), getThreadTemp(), result_reg, cc->args());
1068 __ move(result_reg, result);
1069
1070 break;
1071 }
1072 default: {
1073 ShouldNotReachHere();
1074 }
1075 }
1076 }
1077
1078 void LIRGenerator::do_FmaIntrinsic(Intrinsic* x) {
1079 assert(x->number_of_arguments() == 3, "wrong type");
1080 assert(UseFMA, "Needs FMA instructions support.");
1081 LIRItem value(x->argument_at(0), this);
1082 LIRItem value1(x->argument_at(1), this);
1083 LIRItem value2(x->argument_at(2), this);
1084
1085 value.load_item();
1086 value1.load_item();
1087 value2.load_item();
1088
1089 LIR_Opr calc_input = value.result();
1090 LIR_Opr calc_input1 = value1.result();
1091 LIR_Opr calc_input2 = value2.result();
1092 LIR_Opr calc_result = rlock_result(x);
1093
1094 switch (x->id()) {
1095 case vmIntrinsics::_fmaD: __ fmad(calc_input, calc_input1, calc_input2, calc_result); break;
1096 case vmIntrinsics::_fmaF: __ fmaf(calc_input, calc_input1, calc_input2, calc_result); break;
1097 default: ShouldNotReachHere();
1098 }
1099 }
1100
1101 void LIRGenerator::do_vectorizedMismatch(Intrinsic* x) {
1102 fatal("vectorizedMismatch intrinsic is not implemented on this platform");
1103 }
1104
1105 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
1106 // _i2b, _i2c, _i2s
1107 void LIRGenerator::do_Convert(Convert* x) {
1108 LIRItem value(x->value(), this);
1109 value.load_item();
1110 LIR_Opr input = value.result();
1111 LIR_Opr result = rlock(x);
1112
1113 // arguments of lir_convert
1114 LIR_Opr conv_input = input;
1115 LIR_Opr conv_result = result;
1116
1117 __ convert(x->op(), conv_input, conv_result);
1118
1119 assert(result->is_virtual(), "result must be virtual register");
1120 set_result(x, result);
1121 }
1122
1123 void LIRGenerator::do_NewInstance(NewInstance* x) {
1124 #ifndef PRODUCT
1125 if (PrintNotLoaded && !x->klass()->is_loaded()) {
1126 tty->print_cr(" ###class not loaded at new bci %d", x->printable_bci());
1127 }
1128 #endif
1129 CodeEmitInfo* info = state_for(x, x->state());
1130 LIR_Opr reg = result_register_for(x->type());
1131 new_instance(reg, x->klass(), x->is_unresolved(),
1132 /* allow_inline */ false,
1133 FrameMap::r10_oop_opr,
1134 FrameMap::r11_oop_opr,
1135 FrameMap::r4_oop_opr,
1136 LIR_OprFact::illegalOpr,
1137 FrameMap::r3_metadata_opr, info);
1138 LIR_Opr result = rlock_result(x);
1139 __ move(reg, result);
1140 }
1141
1142 void LIRGenerator::do_NewInlineTypeInstance(NewInlineTypeInstance* x) {
1143 // Mapping to do_NewInstance (same code) but use state_before for reexecution.
1144 CodeEmitInfo* info = state_for(x, x->state_before());
1145 x->set_to_object_type();
1146 LIR_Opr reg = result_register_for(x->type());
1147 new_instance(reg, x->klass(), false,
1148 /* allow_inline */ true,
1149 FrameMap::r10_oop_opr,
1150 FrameMap::r11_oop_opr,
1151 FrameMap::r4_oop_opr,
1152 LIR_OprFact::illegalOpr,
1153 FrameMap::r3_metadata_opr, info);
1154 LIR_Opr result = rlock_result(x);
1155 __ move(reg, result);
1156
1157 }
1158
1159 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
1160 CodeEmitInfo* info = state_for(x, x->state());
1161
1162 LIRItem length(x->length(), this);
1163 length.load_item_force(FrameMap::r19_opr);
1164
1165 LIR_Opr reg = result_register_for(x->type());
1166 LIR_Opr tmp1 = FrameMap::r10_oop_opr;
1167 LIR_Opr tmp2 = FrameMap::r11_oop_opr;
1168 LIR_Opr tmp3 = FrameMap::r5_oop_opr;
1169 LIR_Opr tmp4 = reg;
1170 LIR_Opr klass_reg = FrameMap::r3_metadata_opr;
1171 LIR_Opr len = length.result();
1172 BasicType elem_type = x->elt_type();
1173
1174 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
1175
1176 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
1177 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
1178
1179 LIR_Opr result = rlock_result(x);
1180 __ move(reg, result);
1181 }
1182
1183 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
1184 LIRItem length(x->length(), this);
1185 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
1186 // and therefore provide the state before the parameters have been consumed
1187 CodeEmitInfo* patching_info = NULL;
1188 if (!x->klass()->is_loaded() || PatchALot) {
1189 patching_info = state_for(x, x->state_before());
1190 }
1191
1192 CodeEmitInfo* info = state_for(x, x->state());
1193
1194 LIR_Opr reg = result_register_for(x->type());
1195 LIR_Opr tmp1 = FrameMap::r10_oop_opr;
1196 LIR_Opr tmp2 = FrameMap::r11_oop_opr;
1197 LIR_Opr tmp3 = FrameMap::r5_oop_opr;
1198 LIR_Opr tmp4 = reg;
1199 LIR_Opr klass_reg = FrameMap::r3_metadata_opr;
1200
1201 length.load_item_force(FrameMap::r19_opr);
1202 LIR_Opr len = length.result();
1203
1204 ciKlass* obj = (ciKlass*) x->exact_type();
1205 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info, x->is_null_free());
1206 if (obj == ciEnv::unloaded_ciobjarrayklass()) {
1207 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
1208 }
1209
1210 klass2reg_with_patching(klass_reg, obj, patching_info);
1211 if (x->is_null_free()) {
1212 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_PRIMITIVE_OBJECT, klass_reg, slow_path);
1213 } else {
1214 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
1215 }
1216
1217 LIR_Opr result = rlock_result(x);
1218 __ move(reg, result);
1219 }
1220
1221
1222 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
1223 Values* dims = x->dims();
1224 int i = dims->length();
1225 LIRItemList* items = new LIRItemList(i, i, NULL);
1226 while (i-- > 0) {
1227 LIRItem* size = new LIRItem(dims->at(i), this);
1228 items->at_put(i, size);
1229 }
1230
1231 // Evaluate state_for early since it may emit code.
1232 CodeEmitInfo* patching_info = NULL;
1233 if (!x->klass()->is_loaded() || PatchALot) {
1234 patching_info = state_for(x, x->state_before());
1235
1236 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so
1237 // clone all handlers (NOTE: Usually this is handled transparently
1238 // by the CodeEmitInfo cloning logic in CodeStub constructors but
1239 // is done explicitly here because a stub isn't being used).
1240 x->set_exception_handlers(new XHandlers(x->exception_handlers()));
1241 }
1242 CodeEmitInfo* info = state_for(x, x->state());
1243
1244 i = dims->length();
1245 while (i-- > 0) {
1246 LIRItem* size = items->at(i);
1247 size->load_item();
1248
1249 store_stack_parameter(size->result(), in_ByteSize(i*4));
1250 }
1251
1252 LIR_Opr klass_reg = FrameMap::r0_metadata_opr;
1253 klass2reg_with_patching(klass_reg, x->klass(), patching_info);
1254
1255 LIR_Opr rank = FrameMap::r19_opr;
1256 __ move(LIR_OprFact::intConst(x->rank()), rank);
1257 LIR_Opr varargs = FrameMap::r2_opr;
1258 __ move(FrameMap::sp_opr, varargs);
1259 LIR_OprList* args = new LIR_OprList(3);
1260 args->append(klass_reg);
1261 args->append(rank);
1262 args->append(varargs);
1263 LIR_Opr reg = result_register_for(x->type());
1264 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
1265 LIR_OprFact::illegalOpr,
1266 reg, args, info);
1267
1268 LIR_Opr result = rlock_result(x);
1269 __ move(reg, result);
1270 }
1271
1272 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
1273 // nothing to do for now
1274 }
1275
1276 void LIRGenerator::do_CheckCast(CheckCast* x) {
1277 LIRItem obj(x->obj(), this);
1278
1279 CodeEmitInfo* patching_info = NULL;
1280 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check() && !x->is_invokespecial_receiver_check())) {
1281 // must do this before locking the destination register as an oop register,
1282 // and before the obj is loaded (the latter is for deoptimization)
1283 patching_info = state_for(x, x->state_before());
1284 }
1285 obj.load_item();
1286
1287 // info for exceptions
1288 CodeEmitInfo* info_for_exception =
1289 (x->needs_exception_state() ? state_for(x) :
1290 state_for(x, x->state_before(), true /*ignore_xhandler*/));
1291 if (x->is_null_free()) {
1292 __ null_check(obj.result(), new CodeEmitInfo(info_for_exception));
1293 }
1294
1295 CodeStub* stub;
1296 if (x->is_incompatible_class_change_check()) {
1297 assert(patching_info == NULL, "can't patch this");
1298 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
1299 } else if (x->is_invokespecial_receiver_check()) {
1300 assert(patching_info == NULL, "can't patch this");
1301 stub = new DeoptimizeStub(info_for_exception,
1302 Deoptimization::Reason_class_check,
1303 Deoptimization::Action_none);
1304 } else {
1305 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
1306 }
1307 LIR_Opr reg = rlock_result(x);
1308 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1309 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1310 tmp3 = new_register(objectType);
1311 }
1312
1313
1314 __ checkcast(reg, obj.result(), x->klass(),
1315 new_register(objectType), new_register(objectType), tmp3,
1316 x->direct_compare(), info_for_exception, patching_info, stub,
1317 x->profiled_method(), x->profiled_bci(), x->is_null_free());
1318
1319 }
1320
1321 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
1322 LIRItem obj(x->obj(), this);
1323
1324 // result and test object may not be in same register
1325 LIR_Opr reg = rlock_result(x);
1326 CodeEmitInfo* patching_info = NULL;
1327 if ((!x->klass()->is_loaded() || PatchALot)) {
1328 // must do this before locking the destination register as an oop register
1329 patching_info = state_for(x, x->state_before());
1330 }
1331 obj.load_item();
1332 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1333 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1334 tmp3 = new_register(objectType);
1335 }
1336 __ instanceof(reg, obj.result(), x->klass(),
1337 new_register(objectType), new_register(objectType), tmp3,
1338 x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
1339 }
1340
1341 void LIRGenerator::do_If(If* x) {
1342 assert(x->number_of_sux() == 2, "inconsistency");
1343 ValueTag tag = x->x()->type()->tag();
1344 bool is_safepoint = x->is_safepoint();
1345
1346 If::Condition cond = x->cond();
1347
1348 LIRItem xitem(x->x(), this);
1349 LIRItem yitem(x->y(), this);
1350 LIRItem* xin = &xitem;
1351 LIRItem* yin = &yitem;
1352
1353 if (tag == longTag) {
1354 // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
1355 // mirror for other conditions
1356 if (cond == If::gtr || cond == If::leq) {
1357 cond = Instruction::mirror(cond);
1358 xin = &yitem;
1359 yin = &xitem;
1360 }
1361 xin->set_destroys_register();
1362 }
1363 xin->load_item();
1364
1365 if (tag == longTag) {
1366 if (yin->is_constant()
1367 && Assembler::operand_valid_for_add_sub_immediate(yin->get_jlong_constant())) {
1368 yin->dont_load_item();
1369 } else {
1370 yin->load_item();
1371 }
1372 } else if (tag == intTag) {
1373 if (yin->is_constant()
1374 && Assembler::operand_valid_for_add_sub_immediate(yin->get_jint_constant())) {
1375 yin->dont_load_item();
1376 } else {
1377 yin->load_item();
1378 }
1379 } else {
1380 yin->load_item();
1381 }
1382
1383 set_no_result(x);
1384
1385 LIR_Opr left = xin->result();
1386 LIR_Opr right = yin->result();
1387
1388 // add safepoint before generating condition code so it can be recomputed
1389 if (x->is_safepoint()) {
1390 // increment backedge counter if needed
1391 increment_backedge_counter_conditionally(lir_cond(cond), left, right, state_for(x, x->state_before()),
1392 x->tsux()->bci(), x->fsux()->bci(), x->profiled_bci());
1393 __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before()));
1394 }
1395
1396 if (x->substitutability_check()) {
1397 substitutability_check(x, *xin, *yin);
1398 } else {
1399 __ cmp(lir_cond(cond), left, right);
1400 }
1401
1402 // Generate branch profiling. Profiling code doesn't kill flags.
1403 profile_branch(x, cond);
1404 move_to_phi(x->state());
1405 if (x->x()->type()->is_float_kind()) {
1406 __ branch(lir_cond(cond), x->tsux(), x->usux());
1407 } else {
1408 __ branch(lir_cond(cond), x->tsux());
1409 }
1410 assert(x->default_sux() == x->fsux(), "wrong destination above");
1411 __ jump(x->default_sux());
1412 }
1413
1414 LIR_Opr LIRGenerator::getThreadPointer() {
1415 return FrameMap::as_pointer_opr(rthread);
1416 }
1417
1418 void LIRGenerator::trace_block_entry(BlockBegin* block) { Unimplemented(); }
1419
1420 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
1421 CodeEmitInfo* info) {
1422 __ volatile_store_mem_reg(value, address, info);
1423 }
1424
1425 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
1426 CodeEmitInfo* info) {
1427 // 8179954: We need to make sure that the code generated for
1428 // volatile accesses forms a sequentially-consistent set of
1429 // operations when combined with STLR and LDAR. Without a leading
1430 // membar it's possible for a simple Dekker test to fail if loads
1431 // use LD;DMB but stores use STLR. This can happen if C2 compiles
1432 // the stores in one method and C1 compiles the loads in another.
1433 if (!CompilerConfig::is_c1_only_no_jvmci()) {
1434 __ membar();
1435 }
1436 __ volatile_load_mem_reg(address, result, info);
1437 }