1 /*
2 * Copyright (c) 2013, Red Hat Inc.
3 * Copyright (c) 2005, 2019, Oracle and/or its affiliates.
4 * All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.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/ciObjArrayKlass.hpp"
37 #include "ci/ciTypeArrayKlass.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #include "vmreg_aarch64.inline.hpp"
41
42 #ifdef ASSERT
43 #define __ gen()->lir(__FILE__, __LINE__)->
44 #else
45 #define __ gen()->lir()->
46 #endif
47
48 // Item will be loaded into a byte register; Intel only
49 void LIRItem::load_byte_item() {
50 load_item();
51 }
52
53
54 void LIRItem::load_nonconstant() {
55 LIR_Opr r = value()->operand();
56 if (r->is_constant()) {
57 _result = r;
58 } else {
59 load_item();
60 }
61 }
62
63 //--------------------------------------------------------------
64 // LIRGenerator
65 //--------------------------------------------------------------
66
67
68 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::r0_oop_opr; }
69 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::r3_opr; }
70 LIR_Opr LIRGenerator::divInOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
71 LIR_Opr LIRGenerator::divOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
72 LIR_Opr LIRGenerator::remOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
73 LIR_Opr LIRGenerator::shiftCountOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; }
74 LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::r0_opr; }
75 LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; }
76
77
78 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
79 LIR_Opr opr;
80 switch (type->tag()) {
81 case intTag: opr = FrameMap::r0_opr; break;
82 case objectTag: opr = FrameMap::r0_oop_opr; break;
83 case longTag: opr = FrameMap::long0_opr; break;
84 case floatTag: opr = FrameMap::fpu0_float_opr; break;
85 case doubleTag: opr = FrameMap::fpu0_double_opr; break;
86
87 case addressTag:
88 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
89 }
90
91 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
92 return opr;
93 }
94
95
96 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
97 LIR_Opr reg = new_register(T_INT);
98 set_vreg_flag(reg, LIRGenerator::byte_reg);
99 return reg;
100 }
101
102
103 //--------- loading items into registers --------------------------------
104
105
106 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
107 if (v->type()->as_IntConstant() != NULL) {
108 return v->type()->as_IntConstant()->value() == 0L;
109 } else if (v->type()->as_LongConstant() != NULL) {
110 return v->type()->as_LongConstant()->value() == 0L;
111 } else if (v->type()->as_ObjectConstant() != NULL) {
112 return v->type()->as_ObjectConstant()->value()->is_null_object();
113 } else {
114 return false;
115 }
116 }
117
118 bool LIRGenerator::can_inline_as_constant(Value v) const {
119 // FIXME: Just a guess
120 if (v->type()->as_IntConstant() != NULL) {
121 return Assembler::operand_valid_for_add_sub_immediate(v->type()->as_IntConstant()->value());
122 } else if (v->type()->as_LongConstant() != NULL) {
123 return v->type()->as_LongConstant()->value() == 0L;
124 } else if (v->type()->as_ObjectConstant() != NULL) {
125 return v->type()->as_ObjectConstant()->value()->is_null_object();
126 } else {
127 return false;
128 }
129 }
130
131
132 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const { return false; }
133
134
135 LIR_Opr LIRGenerator::safepoint_poll_register() {
136 return LIR_OprFact::illegalOpr;
137 }
138
139
140 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
141 int shift, int disp, BasicType type) {
142 assert(base->is_register(), "must be");
143
144 // accumulate fixed displacements
145 if (index->is_constant()) {
146 disp += index->as_constant_ptr()->as_jint() << shift;
147 index = LIR_OprFact::illegalOpr;
148 }
149
150 if (index->is_register()) {
151 // apply the shift and accumulate the displacement
152 if (shift > 0) {
153 LIR_Opr tmp = new_pointer_register();
154 __ shift_left(index, shift, tmp);
155 index = tmp;
156 }
157 if (disp != 0) {
158 LIR_Opr tmp = new_pointer_register();
159 if (Assembler::operand_valid_for_add_sub_immediate(disp)) {
160 __ add(tmp, tmp, LIR_OprFact::intptrConst(disp));
161 index = tmp;
162 } else {
163 __ move(tmp, LIR_OprFact::intptrConst(disp));
164 __ add(tmp, index, tmp);
165 index = tmp;
166 }
167 disp = 0;
168 }
169 } else if (disp != 0 && !Address::offset_ok_for_immed(disp, shift)) {
170 // index is illegal so replace it with the displacement loaded into a register
171 index = new_pointer_register();
172 __ move(LIR_OprFact::intptrConst(disp), index);
173 disp = 0;
174 }
175
176 // at this point we either have base + index or base + displacement
177 if (disp == 0) {
178 return new LIR_Address(base, index, type);
179 } else {
180 assert(Address::offset_ok_for_immed(disp, 0), "must be");
181 return new LIR_Address(base, disp, type);
182 }
183 }
184
185
186 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
187 BasicType type, bool needs_card_mark) {
188 int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type);
189 int elem_size = type2aelembytes(type);
190 int shift = exact_log2(elem_size);
191
192 LIR_Address* addr;
193 if (index_opr->is_constant()) {
194 addr = new LIR_Address(array_opr,
195 offset_in_bytes + index_opr->as_jint() * elem_size, type);
196 } else {
197 // #ifdef _LP64
198 // if (index_opr->type() == T_INT) {
199 // LIR_Opr tmp = new_register(T_LONG);
200 // __ convert(Bytecodes::_i2l, index_opr, tmp);
201 // index_opr = tmp;
202 // }
203 // #endif
204 if (offset_in_bytes) {
205 LIR_Opr tmp = new_pointer_register();
206 __ add(array_opr, LIR_OprFact::intConst(offset_in_bytes), tmp);
207 array_opr = tmp;
208 offset_in_bytes = 0;
209 }
210 addr = new LIR_Address(array_opr,
211 index_opr,
212 LIR_Address::scale(type),
213 offset_in_bytes, type);
214 }
215 if (needs_card_mark) {
216 // This store will need a precise card mark, so go ahead and
217 // compute the full adddres instead of computing once for the
218 // store and again for the card mark.
219 LIR_Opr tmp = new_pointer_register();
220 __ leal(LIR_OprFact::address(addr), tmp);
221 return new LIR_Address(tmp, type);
222 } else {
223 return addr;
224 }
225 }
226
227 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
228 LIR_Opr r;
229 if (type == T_LONG) {
230 r = LIR_OprFact::longConst(x);
231 if (!Assembler::operand_valid_for_logical_immediate(false, x)) {
232 LIR_Opr tmp = new_register(type);
233 __ move(r, tmp);
234 return tmp;
235 }
236 } else if (type == T_INT) {
237 r = LIR_OprFact::intConst(x);
238 if (!Assembler::operand_valid_for_logical_immediate(true, x)) {
239 // This is all rather nasty. We don't know whether our constant
240 // is required for a logical or an arithmetic operation, wo we
241 // don't know what the range of valid values is!!
242 LIR_Opr tmp = new_register(type);
243 __ move(r, tmp);
244 return tmp;
245 }
246 } else {
247 ShouldNotReachHere();
248 }
249 return r;
250 }
251
252
253
254 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
255 LIR_Opr pointer = new_pointer_register();
256 __ move(LIR_OprFact::intptrConst(counter), pointer);
257 LIR_Address* addr = new LIR_Address(pointer, type);
258 increment_counter(addr, step);
259 }
260
261
262 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
263 LIR_Opr imm = NULL;
264 switch(addr->type()) {
265 case T_INT:
266 imm = LIR_OprFact::intConst(step);
267 break;
268 case T_LONG:
269 imm = LIR_OprFact::longConst(step);
270 break;
271 default:
272 ShouldNotReachHere();
273 }
274 LIR_Opr reg = new_register(addr->type());
275 __ load(addr, reg);
276 __ add(reg, imm, reg);
277 __ store(reg, addr);
278 }
279
280 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
281 LIR_Opr reg = new_register(T_INT);
282 __ load(generate_address(base, disp, T_INT), reg, info);
283 __ cmp(condition, reg, LIR_OprFact::intConst(c));
284 }
285
286 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
287 LIR_Opr reg1 = new_register(T_INT);
288 __ load(generate_address(base, disp, type), reg1, info);
289 __ cmp(condition, reg, reg1);
290 }
291
292
293 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
294
295 if (is_power_of_2(c - 1)) {
296 __ shift_left(left, exact_log2(c - 1), tmp);
297 __ add(tmp, left, result);
298 return true;
299 } else if (is_power_of_2(c + 1)) {
300 __ shift_left(left, exact_log2(c + 1), tmp);
301 __ sub(tmp, left, result);
302 return true;
303 } else {
304 return false;
305 }
306 }
307
308 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
309 BasicType type = item->type();
310 __ store(item, new LIR_Address(FrameMap::sp_opr, in_bytes(offset_from_sp), type));
311 }
312
313 //----------------------------------------------------------------------
314 // visitor functions
315 //----------------------------------------------------------------------
316
317
318 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
319 assert(x->is_pinned(),"");
320 bool needs_range_check = x->compute_needs_range_check();
321 bool use_length = x->length() != NULL;
322 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
323 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
324 !get_jobject_constant(x->value())->is_null_object() ||
325 x->should_profile());
326
327 LIRItem array(x->array(), this);
328 LIRItem index(x->index(), this);
329 LIRItem value(x->value(), this);
330 LIRItem length(this);
331
332 array.load_item();
333 index.load_nonconstant();
334
335 if (use_length && needs_range_check) {
336 length.set_instruction(x->length());
337 length.load_item();
338
339 }
340 if (needs_store_check || x->check_boolean()) {
341 value.load_item();
342 } else {
343 value.load_for_store(x->elt_type());
344 }
345
346 set_no_result(x);
347
348 // the CodeEmitInfo must be duplicated for each different
349 // LIR-instruction because spilling can occur anywhere between two
350 // instructions and so the debug information must be different
351 CodeEmitInfo* range_check_info = state_for(x);
352 CodeEmitInfo* null_check_info = NULL;
353 if (x->needs_null_check()) {
354 null_check_info = new CodeEmitInfo(range_check_info);
355 }
356
357 // emit array address setup early so it schedules better
358 // FIXME? No harm in this on aarch64, and it might help
359 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store);
360
361 if (GenerateRangeChecks && needs_range_check) {
362 if (use_length) {
363 __ cmp(lir_cond_belowEqual, length.result(), index.result());
364 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
365 } else {
366 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
367 // range_check also does the null check
368 null_check_info = NULL;
369 }
370 }
371
372 if (GenerateArrayStoreCheck && needs_store_check) {
373 LIR_Opr tmp1 = new_register(objectType);
374 LIR_Opr tmp2 = new_register(objectType);
375 LIR_Opr tmp3 = new_register(objectType);
376
377 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
378 __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info, x->profiled_method(), x->profiled_bci());
379 }
380
381 if (obj_store) {
382 // Needs GC write barriers.
383 pre_barrier(LIR_OprFact::address(array_addr), LIR_OprFact::illegalOpr /* pre_val */,
384 true /* do_load */, false /* patch */, NULL);
385 __ move(value.result(), array_addr, null_check_info);
386 // Seems to be a precise
387 post_barrier(LIR_OprFact::address(array_addr), value.result());
388 } else {
389 LIR_Opr result = maybe_mask_boolean(x, array.result(), value.result(), null_check_info);
390 __ move(result, array_addr, null_check_info);
391 }
392 }
393
394 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
395 assert(x->is_pinned(),"");
396 LIRItem obj(x->obj(), this);
397 obj.load_item();
398
399 set_no_result(x);
400
401 // "lock" stores the address of the monitor stack slot, so this is not an oop
402 LIR_Opr lock = new_register(T_INT);
403 // Need a scratch register for biased locking
404 LIR_Opr scratch = LIR_OprFact::illegalOpr;
405 if (UseBiasedLocking) {
406 scratch = new_register(T_INT);
407 }
408
409 CodeEmitInfo* info_for_exception = NULL;
410 if (x->needs_null_check()) {
411 info_for_exception = state_for(x);
412 }
413 // this CodeEmitInfo must not have the xhandlers because here the
414 // object is already locked (xhandlers expect object to be unlocked)
415 CodeEmitInfo* info = state_for(x, x->state(), true);
416 monitor_enter(obj.result(), lock, syncTempOpr(), scratch,
417 x->monitor_no(), info_for_exception, info);
418 }
419
420
421 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
422 assert(x->is_pinned(),"");
423
424 LIRItem obj(x->obj(), this);
425 obj.dont_load_item();
426
427 LIR_Opr lock = new_register(T_INT);
428 LIR_Opr obj_temp = new_register(T_INT);
429 set_no_result(x);
430 monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
431 }
432
433
434 void LIRGenerator::do_NegateOp(NegateOp* x) {
435
436 LIRItem from(x->x(), this);
437 from.load_item();
438 LIR_Opr result = rlock_result(x);
439 __ negate (from.result(), result);
440
441 }
442
443 // for _fadd, _fmul, _fsub, _fdiv, _frem
444 // _dadd, _dmul, _dsub, _ddiv, _drem
445 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
446
447 if (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem) {
448 // float remainder is implemented as a direct call into the runtime
449 LIRItem right(x->x(), this);
450 LIRItem left(x->y(), this);
451
452 BasicTypeList signature(2);
453 if (x->op() == Bytecodes::_frem) {
454 signature.append(T_FLOAT);
455 signature.append(T_FLOAT);
456 } else {
457 signature.append(T_DOUBLE);
458 signature.append(T_DOUBLE);
459 }
460 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
461
462 const LIR_Opr result_reg = result_register_for(x->type());
463 left.load_item_force(cc->at(1));
464 right.load_item();
465
466 __ move(right.result(), cc->at(0));
467
468 address entry;
469 if (x->op() == Bytecodes::_frem) {
470 entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem);
471 } else {
472 entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem);
473 }
474
475 LIR_Opr result = rlock_result(x);
476 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args());
477 __ move(result_reg, result);
478
479 return;
480 }
481
482 LIRItem left(x->x(), this);
483 LIRItem right(x->y(), this);
484 LIRItem* left_arg = &left;
485 LIRItem* right_arg = &right;
486
487 // Always load right hand side.
488 right.load_item();
489
490 if (!left.is_register())
491 left.load_item();
492
493 LIR_Opr reg = rlock(x);
494 LIR_Opr tmp = LIR_OprFact::illegalOpr;
495 if (x->is_strictfp() && (x->op() == Bytecodes::_dmul || x->op() == Bytecodes::_ddiv)) {
496 tmp = new_register(T_DOUBLE);
497 }
498
499 arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), x->is_strictfp());
500
501 set_result(x, round_item(reg));
502 }
503
504 // for _ladd, _lmul, _lsub, _ldiv, _lrem
505 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
506
507 // missing test if instr is commutative and if we should swap
508 LIRItem left(x->x(), this);
509 LIRItem right(x->y(), this);
510
511 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
512
513 // the check for division by zero destroys the right operand
514 right.set_destroys_register();
515
516 // check for division by zero (destroys registers of right operand!)
517 CodeEmitInfo* info = state_for(x);
518
519 left.load_item();
520 right.load_item();
521
522 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0));
523 __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info));
524
525 rlock_result(x);
526 switch (x->op()) {
527 case Bytecodes::_lrem:
528 __ rem (left.result(), right.result(), x->operand());
529 break;
530 case Bytecodes::_ldiv:
531 __ div (left.result(), right.result(), x->operand());
532 break;
533 default:
534 ShouldNotReachHere();
535 break;
536 }
537
538
539 } else {
540 assert (x->op() == Bytecodes::_lmul || x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub,
541 "expect lmul, ladd or lsub");
542 // add, sub, mul
543 left.load_item();
544 if (! right.is_register()) {
545 if (x->op() == Bytecodes::_lmul
546 || ! right.is_constant()
547 || ! Assembler::operand_valid_for_add_sub_immediate(right.get_jlong_constant())) {
548 right.load_item();
549 } else { // add, sub
550 assert (x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub, "expect ladd or lsub");
551 // don't load constants to save register
552 right.load_nonconstant();
553 }
554 }
555 rlock_result(x);
556 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
557 }
558 }
559
560 // for: _iadd, _imul, _isub, _idiv, _irem
561 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
562
563 // Test if instr is commutative and if we should swap
564 LIRItem left(x->x(), this);
565 LIRItem right(x->y(), this);
566 LIRItem* left_arg = &left;
567 LIRItem* right_arg = &right;
568 if (x->is_commutative() && left.is_stack() && right.is_register()) {
569 // swap them if left is real stack (or cached) and right is real register(not cached)
570 left_arg = &right;
571 right_arg = &left;
572 }
573
574 left_arg->load_item();
575
576 // do not need to load right, as we can handle stack and constants
577 if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) {
578
579 right_arg->load_item();
580 rlock_result(x);
581
582 CodeEmitInfo* info = state_for(x);
583 LIR_Opr tmp = new_register(T_INT);
584 __ cmp(lir_cond_equal, right_arg->result(), LIR_OprFact::longConst(0));
585 __ branch(lir_cond_equal, T_INT, new DivByZeroStub(info));
586 info = state_for(x);
587
588 if (x->op() == Bytecodes::_irem) {
589 __ irem(left_arg->result(), right_arg->result(), x->operand(), tmp, NULL);
590 } else if (x->op() == Bytecodes::_idiv) {
591 __ idiv(left_arg->result(), right_arg->result(), x->operand(), tmp, NULL);
592 }
593
594 } else if (x->op() == Bytecodes::_iadd || x->op() == Bytecodes::_isub) {
595 if (right.is_constant()
596 && Assembler::operand_valid_for_add_sub_immediate(right.get_jint_constant())) {
597 right.load_nonconstant();
598 } else {
599 right.load_item();
600 }
601 rlock_result(x);
602 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), LIR_OprFact::illegalOpr);
603 } else {
604 assert (x->op() == Bytecodes::_imul, "expect imul");
605 if (right.is_constant()) {
606 jint c = right.get_jint_constant();
607 if (c > 0 && c < max_jint && (is_power_of_2(c) || is_power_of_2(c - 1) || is_power_of_2(c + 1))) {
608 right_arg->dont_load_item();
609 } else {
610 // Cannot use constant op.
611 right_arg->load_item();
612 }
613 } else {
614 right.load_item();
615 }
616 rlock_result(x);
617 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), new_register(T_INT));
618 }
619 }
620
621 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
622 // when an operand with use count 1 is the left operand, then it is
623 // likely that no move for 2-operand-LIR-form is necessary
624 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
625 x->swap_operands();
626 }
627
628 ValueTag tag = x->type()->tag();
629 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
630 switch (tag) {
631 case floatTag:
632 case doubleTag: do_ArithmeticOp_FPU(x); return;
633 case longTag: do_ArithmeticOp_Long(x); return;
634 case intTag: do_ArithmeticOp_Int(x); return;
635 }
636 ShouldNotReachHere();
637 }
638
639 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
640 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
641
642 LIRItem left(x->x(), this);
643 LIRItem right(x->y(), this);
644
645 left.load_item();
646
647 rlock_result(x);
648 if (right.is_constant()) {
649 right.dont_load_item();
650
651 switch (x->op()) {
652 case Bytecodes::_ishl: {
653 int c = right.get_jint_constant() & 0x1f;
654 __ shift_left(left.result(), c, x->operand());
655 break;
656 }
657 case Bytecodes::_ishr: {
658 int c = right.get_jint_constant() & 0x1f;
659 __ shift_right(left.result(), c, x->operand());
660 break;
661 }
662 case Bytecodes::_iushr: {
663 int c = right.get_jint_constant() & 0x1f;
664 __ unsigned_shift_right(left.result(), c, x->operand());
665 break;
666 }
667 case Bytecodes::_lshl: {
668 int c = right.get_jint_constant() & 0x3f;
669 __ shift_left(left.result(), c, x->operand());
670 break;
671 }
672 case Bytecodes::_lshr: {
673 int c = right.get_jint_constant() & 0x3f;
674 __ shift_right(left.result(), c, x->operand());
675 break;
676 }
677 case Bytecodes::_lushr: {
678 int c = right.get_jint_constant() & 0x3f;
679 __ unsigned_shift_right(left.result(), c, x->operand());
680 break;
681 }
682 default:
683 ShouldNotReachHere();
684 }
685 } else {
686 right.load_item();
687 LIR_Opr tmp = new_register(T_INT);
688 switch (x->op()) {
689 case Bytecodes::_ishl: {
690 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
691 __ shift_left(left.result(), tmp, x->operand(), tmp);
692 break;
693 }
694 case Bytecodes::_ishr: {
695 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
696 __ shift_right(left.result(), tmp, x->operand(), tmp);
697 break;
698 }
699 case Bytecodes::_iushr: {
700 __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp);
701 __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp);
702 break;
703 }
704 case Bytecodes::_lshl: {
705 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
706 __ shift_left(left.result(), tmp, x->operand(), tmp);
707 break;
708 }
709 case Bytecodes::_lshr: {
710 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
711 __ shift_right(left.result(), tmp, x->operand(), tmp);
712 break;
713 }
714 case Bytecodes::_lushr: {
715 __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp);
716 __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp);
717 break;
718 }
719 default:
720 ShouldNotReachHere();
721 }
722 }
723 }
724
725 // _iand, _land, _ior, _lor, _ixor, _lxor
726 void LIRGenerator::do_LogicOp(LogicOp* x) {
727
728 LIRItem left(x->x(), this);
729 LIRItem right(x->y(), this);
730
731 left.load_item();
732
733 rlock_result(x);
734 if (right.is_constant()
735 && ((right.type()->tag() == intTag
736 && Assembler::operand_valid_for_logical_immediate(true, right.get_jint_constant()))
737 || (right.type()->tag() == longTag
738 && Assembler::operand_valid_for_logical_immediate(false, right.get_jlong_constant())))) {
739 right.dont_load_item();
740 } else {
741 right.load_item();
742 }
743 switch (x->op()) {
744 case Bytecodes::_iand:
745 case Bytecodes::_land:
746 __ logical_and(left.result(), right.result(), x->operand()); break;
747 case Bytecodes::_ior:
748 case Bytecodes::_lor:
749 __ logical_or (left.result(), right.result(), x->operand()); break;
750 case Bytecodes::_ixor:
751 case Bytecodes::_lxor:
752 __ logical_xor(left.result(), right.result(), x->operand()); break;
753 default: Unimplemented();
754 }
755 }
756
757 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
758 void LIRGenerator::do_CompareOp(CompareOp* x) {
759 LIRItem left(x->x(), this);
760 LIRItem right(x->y(), this);
761 ValueTag tag = x->x()->type()->tag();
762 if (tag == longTag) {
763 left.set_destroys_register();
764 }
765 left.load_item();
766 right.load_item();
767 LIR_Opr reg = rlock_result(x);
768
769 if (x->x()->type()->is_float_kind()) {
770 Bytecodes::Code code = x->op();
771 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
772 } else if (x->x()->type()->tag() == longTag) {
773 __ lcmp2int(left.result(), right.result(), reg);
774 } else {
775 Unimplemented();
776 }
777 }
778
779 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
780 assert(x->number_of_arguments() == 4, "wrong type");
781 LIRItem obj (x->argument_at(0), this); // object
782 LIRItem offset(x->argument_at(1), this); // offset of field
783 LIRItem cmp (x->argument_at(2), this); // value to compare with field
784 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
785
786 assert(obj.type()->tag() == objectTag, "invalid type");
787
788 // In 64bit the type can be long, sparc doesn't have this assert
789 // assert(offset.type()->tag() == intTag, "invalid type");
790
791 assert(cmp.type()->tag() == type->tag(), "invalid type");
792 assert(val.type()->tag() == type->tag(), "invalid type");
793
794 // get address of field
795 obj.load_item();
796 offset.load_nonconstant();
797 val.load_item();
798 cmp.load_item();
799
800 LIR_Address* a;
801 if(offset.result()->is_constant()) {
802 jlong c = offset.result()->as_jlong();
803 if ((jlong)((jint)c) == c) {
804 a = new LIR_Address(obj.result(),
805 (jint)c,
806 as_BasicType(type));
807 } else {
808 LIR_Opr tmp = new_register(T_LONG);
809 __ move(offset.result(), tmp);
810 a = new LIR_Address(obj.result(),
811 tmp,
812 as_BasicType(type));
813 }
814 } else {
815 a = new LIR_Address(obj.result(),
816 offset.result(),
817 LIR_Address::times_1,
818 0,
819 as_BasicType(type));
820 }
821 LIR_Opr addr = new_pointer_register();
822 __ leal(LIR_OprFact::address(a), addr);
823
824 if (type == objectType) { // Write-barrier needed for Object fields.
825 // Do the pre-write barrier, if any.
826 pre_barrier(addr, LIR_OprFact::illegalOpr /* pre_val */,
827 true /* do_load */, false /* patch */, NULL);
828 }
829
830 LIR_Opr result = rlock_result(x);
831
832 LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience
833 if (type == objectType)
834 __ cas_obj(addr, cmp.result(), val.result(), new_register(T_INT), new_register(T_INT),
835 result);
836 else if (type == intType)
837 __ cas_int(addr, cmp.result(), val.result(), ill, ill);
838 else if (type == longType)
839 __ cas_long(addr, cmp.result(), val.result(), ill, ill);
840 else {
841 ShouldNotReachHere();
842 }
843
844 __ logical_xor(FrameMap::r8_opr, LIR_OprFact::intConst(1), result);
845
846 if (type == objectType) { // Write-barrier needed for Object fields.
847 // Seems to be precise
848 post_barrier(addr, val.result());
849 }
850 }
851
852 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
853 switch (x->id()) {
854 case vmIntrinsics::_dabs:
855 case vmIntrinsics::_dsqrt: {
856 assert(x->number_of_arguments() == 1, "wrong type");
857 LIRItem value(x->argument_at(0), this);
858 value.load_item();
859 LIR_Opr dst = rlock_result(x);
860
861 switch (x->id()) {
862 case vmIntrinsics::_dsqrt: {
863 __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
864 break;
865 }
866 case vmIntrinsics::_dabs: {
867 __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
868 break;
869 }
870 }
871 break;
872 }
873 case vmIntrinsics::_dlog10: // fall through
874 case vmIntrinsics::_dlog: // fall through
875 case vmIntrinsics::_dsin: // fall through
876 case vmIntrinsics::_dtan: // fall through
877 case vmIntrinsics::_dcos: // fall through
878 case vmIntrinsics::_dexp: {
879 assert(x->number_of_arguments() == 1, "wrong type");
880
881 address runtime_entry = NULL;
882 switch (x->id()) {
883 case vmIntrinsics::_dsin:
884 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
885 break;
886 case vmIntrinsics::_dcos:
887 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
888 break;
889 case vmIntrinsics::_dtan:
890 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
891 break;
892 case vmIntrinsics::_dlog:
893 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
894 break;
895 case vmIntrinsics::_dlog10:
896 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
897 break;
898 case vmIntrinsics::_dexp:
899 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
900 break;
901 default:
902 ShouldNotReachHere();
903 }
904
905 LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL);
906 set_result(x, result);
907 break;
908 }
909 case vmIntrinsics::_dpow: {
910 assert(x->number_of_arguments() == 2, "wrong type");
911 address runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
912 LIR_Opr result = call_runtime(x->argument_at(0), x->argument_at(1), runtime_entry, x->type(), NULL);
913 set_result(x, result);
914 break;
915 }
916 }
917 }
918
919
920 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
921 assert(x->number_of_arguments() == 5, "wrong type");
922
923 // Make all state_for calls early since they can emit code
924 CodeEmitInfo* info = state_for(x, x->state());
925
926 LIRItem src(x->argument_at(0), this);
927 LIRItem src_pos(x->argument_at(1), this);
928 LIRItem dst(x->argument_at(2), this);
929 LIRItem dst_pos(x->argument_at(3), this);
930 LIRItem length(x->argument_at(4), this);
931
932 // operands for arraycopy must use fixed registers, otherwise
933 // LinearScan will fail allocation (because arraycopy always needs a
934 // call)
935
936 // The java calling convention will give us enough registers
937 // so that on the stub side the args will be perfect already.
938 // On the other slow/special case side we call C and the arg
939 // positions are not similar enough to pick one as the best.
940 // Also because the java calling convention is a "shifted" version
941 // of the C convention we can process the java args trivially into C
942 // args without worry of overwriting during the xfer
943
944 src.load_item_force (FrameMap::as_oop_opr(j_rarg0));
945 src_pos.load_item_force (FrameMap::as_opr(j_rarg1));
946 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2));
947 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3));
948 length.load_item_force (FrameMap::as_opr(j_rarg4));
949
950 LIR_Opr tmp = FrameMap::as_opr(j_rarg5);
951
952 set_no_result(x);
953
954 int flags;
955 ciArrayKlass* expected_type;
956 arraycopy_helper(x, &flags, &expected_type);
957
958 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint
959 }
960
961 void LIRGenerator::do_update_CRC32(Intrinsic* x) {
962 assert(UseCRC32Intrinsics, "why are we here?");
963 // Make all state_for calls early since they can emit code
964 LIR_Opr result = rlock_result(x);
965 int flags = 0;
966 switch (x->id()) {
967 case vmIntrinsics::_updateCRC32: {
968 LIRItem crc(x->argument_at(0), this);
969 LIRItem val(x->argument_at(1), this);
970 // val is destroyed by update_crc32
971 val.set_destroys_register();
972 crc.load_item();
973 val.load_item();
974 __ update_crc32(crc.result(), val.result(), result);
975 break;
976 }
977 case vmIntrinsics::_updateBytesCRC32:
978 case vmIntrinsics::_updateByteBufferCRC32: {
979 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32);
980
981 LIRItem crc(x->argument_at(0), this);
982 LIRItem buf(x->argument_at(1), this);
983 LIRItem off(x->argument_at(2), this);
984 LIRItem len(x->argument_at(3), this);
985 buf.load_item();
986 off.load_nonconstant();
987
988 LIR_Opr index = off.result();
989 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0;
990 if(off.result()->is_constant()) {
991 index = LIR_OprFact::illegalOpr;
992 offset += off.result()->as_jint();
993 }
994 LIR_Opr base_op = buf.result();
995
996 if (index->is_valid()) {
997 LIR_Opr tmp = new_register(T_LONG);
998 __ convert(Bytecodes::_i2l, index, tmp);
999 index = tmp;
1000 }
1001
1002 if (offset) {
1003 LIR_Opr tmp = new_pointer_register();
1004 __ add(base_op, LIR_OprFact::intConst(offset), tmp);
1005 base_op = tmp;
1006 offset = 0;
1007 }
1008
1009 LIR_Address* a = new LIR_Address(base_op,
1010 index,
1011 LIR_Address::times_1,
1012 offset,
1013 T_BYTE);
1014 BasicTypeList signature(3);
1015 signature.append(T_INT);
1016 signature.append(T_ADDRESS);
1017 signature.append(T_INT);
1018 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
1019 const LIR_Opr result_reg = result_register_for(x->type());
1020
1021 LIR_Opr addr = new_pointer_register();
1022 __ leal(LIR_OprFact::address(a), addr);
1023
1024 crc.load_item_force(cc->at(0));
1025 __ move(addr, cc->at(1));
1026 len.load_item_force(cc->at(2));
1027
1028 __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args());
1029 __ move(result_reg, result);
1030
1031 break;
1032 }
1033 default: {
1034 ShouldNotReachHere();
1035 }
1036 }
1037 }
1038
1039 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
1040 // _i2b, _i2c, _i2s
1041 void LIRGenerator::do_Convert(Convert* x) {
1042 bool needs_stub;
1043
1044 switch (x->op()) {
1045 case Bytecodes::_i2l:
1046 case Bytecodes::_l2i:
1047 case Bytecodes::_i2b:
1048 case Bytecodes::_i2c:
1049 case Bytecodes::_i2s:
1050 case Bytecodes::_f2d:
1051 case Bytecodes::_d2f:
1052 case Bytecodes::_i2f:
1053 case Bytecodes::_i2d:
1054 case Bytecodes::_l2f:
1055 case Bytecodes::_l2d: needs_stub = false;
1056 break;
1057 case Bytecodes::_f2l:
1058 case Bytecodes::_d2l:
1059 case Bytecodes::_f2i:
1060 case Bytecodes::_d2i: needs_stub = true;
1061 break;
1062 default: ShouldNotReachHere();
1063 }
1064
1065 LIRItem value(x->value(), this);
1066 value.load_item();
1067 LIR_Opr input = value.result();
1068 LIR_Opr result = rlock(x);
1069
1070 // arguments of lir_convert
1071 LIR_Opr conv_input = input;
1072 LIR_Opr conv_result = result;
1073 ConversionStub* stub = NULL;
1074
1075 if (needs_stub) {
1076 stub = new ConversionStub(x->op(), conv_input, conv_result);
1077 }
1078
1079 __ convert(x->op(), conv_input, conv_result, stub, new_register(T_INT));
1080
1081 assert(result->is_virtual(), "result must be virtual register");
1082 set_result(x, result);
1083 }
1084
1085 void LIRGenerator::do_NewInstance(NewInstance* x) {
1086 #ifndef PRODUCT
1087 if (PrintNotLoaded && !x->klass()->is_loaded()) {
1088 tty->print_cr(" ###class not loaded at new bci %d", x->printable_bci());
1089 }
1090 #endif
1091 CodeEmitInfo* info = state_for(x, x->state());
1092 LIR_Opr reg = result_register_for(x->type());
1093 new_instance(reg, x->klass(), x->is_unresolved(),
1094 FrameMap::r2_oop_opr,
1095 FrameMap::r5_oop_opr,
1096 FrameMap::r4_oop_opr,
1097 LIR_OprFact::illegalOpr,
1098 FrameMap::r3_metadata_opr, info);
1099 LIR_Opr result = rlock_result(x);
1100 __ move(reg, result);
1101 }
1102
1103 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
1104 CodeEmitInfo* info = state_for(x, x->state());
1105
1106 LIRItem length(x->length(), this);
1107 length.load_item_force(FrameMap::r19_opr);
1108
1109 LIR_Opr reg = result_register_for(x->type());
1110 LIR_Opr tmp1 = FrameMap::r2_oop_opr;
1111 LIR_Opr tmp2 = FrameMap::r4_oop_opr;
1112 LIR_Opr tmp3 = FrameMap::r5_oop_opr;
1113 LIR_Opr tmp4 = reg;
1114 LIR_Opr klass_reg = FrameMap::r3_metadata_opr;
1115 LIR_Opr len = length.result();
1116 BasicType elem_type = x->elt_type();
1117
1118 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
1119
1120 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
1121 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
1122
1123 LIR_Opr result = rlock_result(x);
1124 __ move(reg, result);
1125 }
1126
1127 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
1128 LIRItem length(x->length(), this);
1129 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
1130 // and therefore provide the state before the parameters have been consumed
1131 CodeEmitInfo* patching_info = NULL;
1132 if (!x->klass()->is_loaded() || PatchALot) {
1133 patching_info = state_for(x, x->state_before());
1134 }
1135
1136 CodeEmitInfo* info = state_for(x, x->state());
1137
1138 LIR_Opr reg = result_register_for(x->type());
1139 LIR_Opr tmp1 = FrameMap::r2_oop_opr;
1140 LIR_Opr tmp2 = FrameMap::r4_oop_opr;
1141 LIR_Opr tmp3 = FrameMap::r5_oop_opr;
1142 LIR_Opr tmp4 = reg;
1143 LIR_Opr klass_reg = FrameMap::r3_metadata_opr;
1144
1145 length.load_item_force(FrameMap::r19_opr);
1146 LIR_Opr len = length.result();
1147
1148 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
1149 ciKlass* obj = (ciKlass*) ciObjArrayKlass::make(x->klass());
1150 if (obj == ciEnv::unloaded_ciobjarrayklass()) {
1151 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
1152 }
1153 klass2reg_with_patching(klass_reg, obj, patching_info);
1154 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
1155
1156 LIR_Opr result = rlock_result(x);
1157 __ move(reg, result);
1158 }
1159
1160
1161 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
1162 Values* dims = x->dims();
1163 int i = dims->length();
1164 LIRItemList* items = new LIRItemList(dims->length(), NULL);
1165 while (i-- > 0) {
1166 LIRItem* size = new LIRItem(dims->at(i), this);
1167 items->at_put(i, size);
1168 }
1169
1170 // Evaluate state_for early since it may emit code.
1171 CodeEmitInfo* patching_info = NULL;
1172 if (!x->klass()->is_loaded() || PatchALot) {
1173 patching_info = state_for(x, x->state_before());
1174
1175 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so
1176 // clone all handlers (NOTE: Usually this is handled transparently
1177 // by the CodeEmitInfo cloning logic in CodeStub constructors but
1178 // is done explicitly here because a stub isn't being used).
1179 x->set_exception_handlers(new XHandlers(x->exception_handlers()));
1180 }
1181 CodeEmitInfo* info = state_for(x, x->state());
1182
1183 i = dims->length();
1184 while (i-- > 0) {
1185 LIRItem* size = items->at(i);
1186 size->load_item();
1187
1188 store_stack_parameter(size->result(), in_ByteSize(i*4));
1189 }
1190
1191 LIR_Opr klass_reg = FrameMap::r0_metadata_opr;
1192 klass2reg_with_patching(klass_reg, x->klass(), patching_info);
1193
1194 LIR_Opr rank = FrameMap::r19_opr;
1195 __ move(LIR_OprFact::intConst(x->rank()), rank);
1196 LIR_Opr varargs = FrameMap::r2_opr;
1197 __ move(FrameMap::sp_opr, varargs);
1198 LIR_OprList* args = new LIR_OprList(3);
1199 args->append(klass_reg);
1200 args->append(rank);
1201 args->append(varargs);
1202 LIR_Opr reg = result_register_for(x->type());
1203 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
1204 LIR_OprFact::illegalOpr,
1205 reg, args, info);
1206
1207 LIR_Opr result = rlock_result(x);
1208 __ move(reg, result);
1209 }
1210
1211 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
1212 // nothing to do for now
1213 }
1214
1215 void LIRGenerator::do_CheckCast(CheckCast* x) {
1216 LIRItem obj(x->obj(), this);
1217
1218 CodeEmitInfo* patching_info = NULL;
1219 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
1220 // must do this before locking the destination register as an oop register,
1221 // and before the obj is loaded (the latter is for deoptimization)
1222 patching_info = state_for(x, x->state_before());
1223 }
1224 obj.load_item();
1225
1226 // info for exceptions
1227 CodeEmitInfo* info_for_exception =
1228 (x->needs_exception_state() ? state_for(x) :
1229 state_for(x, x->state_before(), true /*ignore_xhandler*/));
1230
1231 CodeStub* stub;
1232 if (x->is_incompatible_class_change_check()) {
1233 assert(patching_info == NULL, "can't patch this");
1234 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
1235 } else if (x->is_invokespecial_receiver_check()) {
1236 assert(patching_info == NULL, "can't patch this");
1237 stub = new DeoptimizeStub(info_for_exception);
1238 } else {
1239 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
1240 }
1241 LIR_Opr reg = rlock_result(x);
1242 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1243 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1244 tmp3 = new_register(objectType);
1245 }
1246 __ checkcast(reg, obj.result(), x->klass(),
1247 new_register(objectType), new_register(objectType), tmp3,
1248 x->direct_compare(), info_for_exception, patching_info, stub,
1249 x->profiled_method(), x->profiled_bci());
1250 }
1251
1252 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
1253 LIRItem obj(x->obj(), this);
1254
1255 // result and test object may not be in same register
1256 LIR_Opr reg = rlock_result(x);
1257 CodeEmitInfo* patching_info = NULL;
1258 if ((!x->klass()->is_loaded() || PatchALot)) {
1259 // must do this before locking the destination register as an oop register
1260 patching_info = state_for(x, x->state_before());
1261 }
1262 obj.load_item();
1263 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1264 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1265 tmp3 = new_register(objectType);
1266 }
1267 __ instanceof(reg, obj.result(), x->klass(),
1268 new_register(objectType), new_register(objectType), tmp3,
1269 x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
1270 }
1271
1272 void LIRGenerator::do_If(If* x) {
1273 assert(x->number_of_sux() == 2, "inconsistency");
1274 ValueTag tag = x->x()->type()->tag();
1275 bool is_safepoint = x->is_safepoint();
1276
1277 If::Condition cond = x->cond();
1278
1279 LIRItem xitem(x->x(), this);
1280 LIRItem yitem(x->y(), this);
1281 LIRItem* xin = &xitem;
1282 LIRItem* yin = &yitem;
1283
1284 if (tag == longTag) {
1285 // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
1286 // mirror for other conditions
1287 if (cond == If::gtr || cond == If::leq) {
1288 cond = Instruction::mirror(cond);
1289 xin = &yitem;
1290 yin = &xitem;
1291 }
1292 xin->set_destroys_register();
1293 }
1294 xin->load_item();
1295
1296 if (tag == longTag) {
1297 if (yin->is_constant()
1298 && Assembler::operand_valid_for_add_sub_immediate(yin->get_jlong_constant())) {
1299 yin->dont_load_item();
1300 } else {
1301 yin->load_item();
1302 }
1303 } else if (tag == intTag) {
1304 if (yin->is_constant()
1305 && Assembler::operand_valid_for_add_sub_immediate(yin->get_jint_constant())) {
1306 yin->dont_load_item();
1307 } else {
1308 yin->load_item();
1309 }
1310 } else {
1311 yin->load_item();
1312 }
1313
1314 // add safepoint before generating condition code so it can be recomputed
1315 if (x->is_safepoint()) {
1316 // increment backedge counter if needed
1317 increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci());
1318 __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before()));
1319 }
1320 set_no_result(x);
1321
1322 LIR_Opr left = xin->result();
1323 LIR_Opr right = yin->result();
1324
1325 __ cmp(lir_cond(cond), left, right);
1326 // Generate branch profiling. Profiling code doesn't kill flags.
1327 profile_branch(x, cond);
1328 move_to_phi(x->state());
1329 if (x->x()->type()->is_float_kind()) {
1330 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux());
1331 } else {
1332 __ branch(lir_cond(cond), right->type(), x->tsux());
1333 }
1334 assert(x->default_sux() == x->fsux(), "wrong destination above");
1335 __ jump(x->default_sux());
1336 }
1337
1338 LIR_Opr LIRGenerator::getThreadPointer() {
1339 return FrameMap::as_pointer_opr(rthread);
1340 }
1341
1342 void LIRGenerator::trace_block_entry(BlockBegin* block) { Unimplemented(); }
1343
1344 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
1345 CodeEmitInfo* info) {
1346 __ volatile_store_mem_reg(value, address, info);
1347 }
1348
1349 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
1350 CodeEmitInfo* info) {
1351
1352 // 8179954: We need to make sure that the code generated for
1353 // volatile accesses forms a sequentially-consistent set of
1354 // operations when combined with STLR and LDAR. Without a leading
1355 // membar it's possible for a simple Dekker test to fail if loads
1356 // use LD;DMB but stores use STLR. This can happen if C2 compiles
1357 // the stores in one method and C1 compiles the loads in another.
1358 if (! UseBarriersForVolatile) {
1359 __ membar();
1360 }
1361
1362 __ volatile_load_mem_reg(address, result, info);
1363 }
1364
1365 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset,
1366 BasicType type, bool is_volatile) {
1367 LIR_Address* addr = new LIR_Address(src, offset, type);
1368 __ load(addr, dst);
1369 }
1370
1371
1372 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data,
1373 BasicType type, bool is_volatile) {
1374 LIR_Address* addr = new LIR_Address(src, offset, type);
1375 bool is_obj = (type == T_ARRAY || type == T_OBJECT);
1376 if (is_obj) {
1377 // Do the pre-write barrier, if any.
1378 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
1379 true /* do_load */, false /* patch */, NULL);
1380 __ move(data, addr);
1381 assert(src->is_register(), "must be register");
1382 // Seems to be a precise address
1383 post_barrier(LIR_OprFact::address(addr), data);
1384 } else {
1385 __ move(data, addr);
1386 }
1387 }
1388
1389 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
1390 BasicType type = x->basic_type();
1391 LIRItem src(x->object(), this);
1392 LIRItem off(x->offset(), this);
1393 LIRItem value(x->value(), this);
1394
1395 src.load_item();
1396 off.load_nonconstant();
1397
1398 // We can cope with a constant increment in an xadd
1399 if (! (x->is_add()
1400 && value.is_constant()
1401 && can_inline_as_constant(x->value()))) {
1402 value.load_item();
1403 }
1404
1405 LIR_Opr dst = rlock_result(x, type);
1406 LIR_Opr data = value.result();
1407 bool is_obj = (type == T_ARRAY || type == T_OBJECT);
1408 LIR_Opr offset = off.result();
1409
1410 if (data == dst) {
1411 LIR_Opr tmp = new_register(data->type());
1412 __ move(data, tmp);
1413 data = tmp;
1414 }
1415
1416 LIR_Address* addr;
1417 if (offset->is_constant()) {
1418 jlong l = offset->as_jlong();
1419 assert((jlong)((jint)l) == l, "offset too large for constant");
1420 jint c = (jint)l;
1421 addr = new LIR_Address(src.result(), c, type);
1422 } else {
1423 addr = new LIR_Address(src.result(), offset, type);
1424 }
1425
1426 LIR_Opr tmp = new_register(T_INT);
1427 LIR_Opr ptr = LIR_OprFact::illegalOpr;
1428
1429 if (x->is_add()) {
1430 __ xadd(LIR_OprFact::address(addr), data, dst, tmp);
1431 } else {
1432 if (is_obj) {
1433 // Do the pre-write barrier, if any.
1434 ptr = new_pointer_register();
1435 __ add(src.result(), off.result(), ptr);
1436 pre_barrier(ptr, LIR_OprFact::illegalOpr /* pre_val */,
1437 true /* do_load */, false /* patch */, NULL);
1438 }
1439 __ xchg(LIR_OprFact::address(addr), data, dst, tmp);
1440 if (is_obj) {
1441 post_barrier(ptr, data);
1442 }
1443 }
1444 }