Mercurial > hg > truffle
annotate src/share/vm/c1/c1_LIRGenerator.cpp @ 1828:3f9a70eb8b1f
6989368: Regression in scimark2.MonteCarlo in jdk7_b112 on Linux
Summary: Fix ciMethod::instructions_size() to return correct value
Reviewed-by: kvn, twisti
author | iveresov |
---|---|
date | Tue, 05 Oct 2010 00:19:21 -0700 |
parents | 80c9354976b0 |
children | c393f046f4c5 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_c1_LIRGenerator.cpp.incl" | |
27 | |
28 #ifdef ASSERT | |
29 #define __ gen()->lir(__FILE__, __LINE__)-> | |
30 #else | |
31 #define __ gen()->lir()-> | |
32 #endif | |
33 | |
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34 // TODO: ARM - Use some recognizable constant which still fits architectural constraints |
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35 #ifdef ARM |
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36 #define PATCHED_ADDR (204) |
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37 #else |
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38 #define PATCHED_ADDR (max_jint) |
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39 #endif |
0 | 40 |
41 void PhiResolverState::reset(int max_vregs) { | |
42 // Initialize array sizes | |
43 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL); | |
44 _virtual_operands.trunc_to(0); | |
45 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL); | |
46 _other_operands.trunc_to(0); | |
47 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL); | |
48 _vreg_table.trunc_to(0); | |
49 } | |
50 | |
51 | |
52 | |
53 //-------------------------------------------------------------- | |
54 // PhiResolver | |
55 | |
56 // Resolves cycles: | |
57 // | |
58 // r1 := r2 becomes temp := r1 | |
59 // r2 := r1 r1 := r2 | |
60 // r2 := temp | |
61 // and orders moves: | |
62 // | |
63 // r2 := r3 becomes r1 := r2 | |
64 // r1 := r2 r2 := r3 | |
65 | |
66 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs) | |
67 : _gen(gen) | |
68 , _state(gen->resolver_state()) | |
69 , _temp(LIR_OprFact::illegalOpr) | |
70 { | |
71 // reinitialize the shared state arrays | |
72 _state.reset(max_vregs); | |
73 } | |
74 | |
75 | |
76 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) { | |
77 assert(src->is_valid(), ""); | |
78 assert(dest->is_valid(), ""); | |
79 __ move(src, dest); | |
80 } | |
81 | |
82 | |
83 void PhiResolver::move_temp_to(LIR_Opr dest) { | |
84 assert(_temp->is_valid(), ""); | |
85 emit_move(_temp, dest); | |
86 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr); | |
87 } | |
88 | |
89 | |
90 void PhiResolver::move_to_temp(LIR_Opr src) { | |
91 assert(_temp->is_illegal(), ""); | |
92 _temp = _gen->new_register(src->type()); | |
93 emit_move(src, _temp); | |
94 } | |
95 | |
96 | |
97 // Traverse assignment graph in depth first order and generate moves in post order | |
98 // ie. two assignments: b := c, a := b start with node c: | |
99 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a) | |
100 // Generates moves in this order: move b to a and move c to b | |
101 // ie. cycle a := b, b := a start with node a | |
102 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a) | |
103 // Generates moves in this order: move b to temp, move a to b, move temp to a | |
104 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) { | |
105 if (!dest->visited()) { | |
106 dest->set_visited(); | |
107 for (int i = dest->no_of_destinations()-1; i >= 0; i --) { | |
108 move(dest, dest->destination_at(i)); | |
109 } | |
110 } else if (!dest->start_node()) { | |
111 // cylce in graph detected | |
112 assert(_loop == NULL, "only one loop valid!"); | |
113 _loop = dest; | |
114 move_to_temp(src->operand()); | |
115 return; | |
116 } // else dest is a start node | |
117 | |
118 if (!dest->assigned()) { | |
119 if (_loop == dest) { | |
120 move_temp_to(dest->operand()); | |
121 dest->set_assigned(); | |
122 } else if (src != NULL) { | |
123 emit_move(src->operand(), dest->operand()); | |
124 dest->set_assigned(); | |
125 } | |
126 } | |
127 } | |
128 | |
129 | |
130 PhiResolver::~PhiResolver() { | |
131 int i; | |
132 // resolve any cycles in moves from and to virtual registers | |
133 for (i = virtual_operands().length() - 1; i >= 0; i --) { | |
134 ResolveNode* node = virtual_operands()[i]; | |
135 if (!node->visited()) { | |
136 _loop = NULL; | |
137 move(NULL, node); | |
138 node->set_start_node(); | |
139 assert(_temp->is_illegal(), "move_temp_to() call missing"); | |
140 } | |
141 } | |
142 | |
143 // generate move for move from non virtual register to abitrary destination | |
144 for (i = other_operands().length() - 1; i >= 0; i --) { | |
145 ResolveNode* node = other_operands()[i]; | |
146 for (int j = node->no_of_destinations() - 1; j >= 0; j --) { | |
147 emit_move(node->operand(), node->destination_at(j)->operand()); | |
148 } | |
149 } | |
150 } | |
151 | |
152 | |
153 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) { | |
154 ResolveNode* node; | |
155 if (opr->is_virtual()) { | |
156 int vreg_num = opr->vreg_number(); | |
157 node = vreg_table().at_grow(vreg_num, NULL); | |
158 assert(node == NULL || node->operand() == opr, ""); | |
159 if (node == NULL) { | |
160 node = new ResolveNode(opr); | |
161 vreg_table()[vreg_num] = node; | |
162 } | |
163 // Make sure that all virtual operands show up in the list when | |
164 // they are used as the source of a move. | |
165 if (source && !virtual_operands().contains(node)) { | |
166 virtual_operands().append(node); | |
167 } | |
168 } else { | |
169 assert(source, ""); | |
170 node = new ResolveNode(opr); | |
171 other_operands().append(node); | |
172 } | |
173 return node; | |
174 } | |
175 | |
176 | |
177 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) { | |
178 assert(dest->is_virtual(), ""); | |
179 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr(); | |
180 assert(src->is_valid(), ""); | |
181 assert(dest->is_valid(), ""); | |
182 ResolveNode* source = source_node(src); | |
183 source->append(destination_node(dest)); | |
184 } | |
185 | |
186 | |
187 //-------------------------------------------------------------- | |
188 // LIRItem | |
189 | |
190 void LIRItem::set_result(LIR_Opr opr) { | |
191 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change"); | |
192 value()->set_operand(opr); | |
193 | |
194 if (opr->is_virtual()) { | |
195 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL); | |
196 } | |
197 | |
198 _result = opr; | |
199 } | |
200 | |
201 void LIRItem::load_item() { | |
202 if (result()->is_illegal()) { | |
203 // update the items result | |
204 _result = value()->operand(); | |
205 } | |
206 if (!result()->is_register()) { | |
207 LIR_Opr reg = _gen->new_register(value()->type()); | |
208 __ move(result(), reg); | |
209 if (result()->is_constant()) { | |
210 _result = reg; | |
211 } else { | |
212 set_result(reg); | |
213 } | |
214 } | |
215 } | |
216 | |
217 | |
218 void LIRItem::load_for_store(BasicType type) { | |
219 if (_gen->can_store_as_constant(value(), type)) { | |
220 _result = value()->operand(); | |
221 if (!_result->is_constant()) { | |
222 _result = LIR_OprFact::value_type(value()->type()); | |
223 } | |
224 } else if (type == T_BYTE || type == T_BOOLEAN) { | |
225 load_byte_item(); | |
226 } else { | |
227 load_item(); | |
228 } | |
229 } | |
230 | |
231 void LIRItem::load_item_force(LIR_Opr reg) { | |
232 LIR_Opr r = result(); | |
233 if (r != reg) { | |
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234 #if !defined(ARM) && !defined(E500V2) |
0 | 235 if (r->type() != reg->type()) { |
236 // moves between different types need an intervening spill slot | |
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237 r = _gen->force_to_spill(r, reg->type()); |
0 | 238 } |
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239 #endif |
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240 __ move(r, reg); |
0 | 241 _result = reg; |
242 } | |
243 } | |
244 | |
245 ciObject* LIRItem::get_jobject_constant() const { | |
246 ObjectType* oc = type()->as_ObjectType(); | |
247 if (oc) { | |
248 return oc->constant_value(); | |
249 } | |
250 return NULL; | |
251 } | |
252 | |
253 | |
254 jint LIRItem::get_jint_constant() const { | |
255 assert(is_constant() && value() != NULL, ""); | |
256 assert(type()->as_IntConstant() != NULL, "type check"); | |
257 return type()->as_IntConstant()->value(); | |
258 } | |
259 | |
260 | |
261 jint LIRItem::get_address_constant() const { | |
262 assert(is_constant() && value() != NULL, ""); | |
263 assert(type()->as_AddressConstant() != NULL, "type check"); | |
264 return type()->as_AddressConstant()->value(); | |
265 } | |
266 | |
267 | |
268 jfloat LIRItem::get_jfloat_constant() const { | |
269 assert(is_constant() && value() != NULL, ""); | |
270 assert(type()->as_FloatConstant() != NULL, "type check"); | |
271 return type()->as_FloatConstant()->value(); | |
272 } | |
273 | |
274 | |
275 jdouble LIRItem::get_jdouble_constant() const { | |
276 assert(is_constant() && value() != NULL, ""); | |
277 assert(type()->as_DoubleConstant() != NULL, "type check"); | |
278 return type()->as_DoubleConstant()->value(); | |
279 } | |
280 | |
281 | |
282 jlong LIRItem::get_jlong_constant() const { | |
283 assert(is_constant() && value() != NULL, ""); | |
284 assert(type()->as_LongConstant() != NULL, "type check"); | |
285 return type()->as_LongConstant()->value(); | |
286 } | |
287 | |
288 | |
289 | |
290 //-------------------------------------------------------------- | |
291 | |
292 | |
293 void LIRGenerator::init() { | |
342 | 294 _bs = Universe::heap()->barrier_set(); |
0 | 295 } |
296 | |
297 | |
298 void LIRGenerator::block_do_prolog(BlockBegin* block) { | |
299 #ifndef PRODUCT | |
300 if (PrintIRWithLIR) { | |
301 block->print(); | |
302 } | |
303 #endif | |
304 | |
305 // set up the list of LIR instructions | |
306 assert(block->lir() == NULL, "LIR list already computed for this block"); | |
307 _lir = new LIR_List(compilation(), block); | |
308 block->set_lir(_lir); | |
309 | |
310 __ branch_destination(block->label()); | |
311 | |
312 if (LIRTraceExecution && | |
1584 | 313 Compilation::current()->hir()->start()->block_id() != block->block_id() && |
0 | 314 !block->is_set(BlockBegin::exception_entry_flag)) { |
315 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst"); | |
316 trace_block_entry(block); | |
317 } | |
318 } | |
319 | |
320 | |
321 void LIRGenerator::block_do_epilog(BlockBegin* block) { | |
322 #ifndef PRODUCT | |
323 if (PrintIRWithLIR) { | |
324 tty->cr(); | |
325 } | |
326 #endif | |
327 | |
328 // LIR_Opr for unpinned constants shouldn't be referenced by other | |
329 // blocks so clear them out after processing the block. | |
330 for (int i = 0; i < _unpinned_constants.length(); i++) { | |
331 _unpinned_constants.at(i)->clear_operand(); | |
332 } | |
333 _unpinned_constants.trunc_to(0); | |
334 | |
335 // clear our any registers for other local constants | |
336 _constants.trunc_to(0); | |
337 _reg_for_constants.trunc_to(0); | |
338 } | |
339 | |
340 | |
341 void LIRGenerator::block_do(BlockBegin* block) { | |
342 CHECK_BAILOUT(); | |
343 | |
344 block_do_prolog(block); | |
345 set_block(block); | |
346 | |
347 for (Instruction* instr = block; instr != NULL; instr = instr->next()) { | |
348 if (instr->is_pinned()) do_root(instr); | |
349 } | |
350 | |
351 set_block(NULL); | |
352 block_do_epilog(block); | |
353 } | |
354 | |
355 | |
356 //-------------------------LIRGenerator----------------------------- | |
357 | |
358 // This is where the tree-walk starts; instr must be root; | |
359 void LIRGenerator::do_root(Value instr) { | |
360 CHECK_BAILOUT(); | |
361 | |
362 InstructionMark im(compilation(), instr); | |
363 | |
364 assert(instr->is_pinned(), "use only with roots"); | |
365 assert(instr->subst() == instr, "shouldn't have missed substitution"); | |
366 | |
367 instr->visit(this); | |
368 | |
369 assert(!instr->has_uses() || instr->operand()->is_valid() || | |
370 instr->as_Constant() != NULL || bailed_out(), "invalid item set"); | |
371 } | |
372 | |
373 | |
374 // This is called for each node in tree; the walk stops if a root is reached | |
375 void LIRGenerator::walk(Value instr) { | |
376 InstructionMark im(compilation(), instr); | |
377 //stop walk when encounter a root | |
378 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) { | |
379 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited"); | |
380 } else { | |
381 assert(instr->subst() == instr, "shouldn't have missed substitution"); | |
382 instr->visit(this); | |
383 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use"); | |
384 } | |
385 } | |
386 | |
387 | |
388 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) { | |
1819 | 389 assert(state != NULL, "state must be defined"); |
390 | |
391 ValueStack* s = state; | |
392 for_each_state(s) { | |
393 if (s->kind() == ValueStack::EmptyExceptionState) { | |
394 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty"); | |
395 continue; | |
0 | 396 } |
1819 | 397 |
398 int index; | |
399 Value value; | |
400 for_each_stack_value(s, index, value) { | |
401 assert(value->subst() == value, "missed substitution"); | |
402 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { | |
403 walk(value); | |
404 assert(value->operand()->is_valid(), "must be evaluated now"); | |
405 } | |
406 } | |
407 | |
408 int bci = s->bci(); | |
0 | 409 IRScope* scope = s->scope(); |
410 ciMethod* method = scope->method(); | |
411 | |
412 MethodLivenessResult liveness = method->liveness_at_bci(bci); | |
413 if (bci == SynchronizationEntryBCI) { | |
414 if (x->as_ExceptionObject() || x->as_Throw()) { | |
415 // all locals are dead on exit from the synthetic unlocker | |
416 liveness.clear(); | |
417 } else { | |
418 assert(x->as_MonitorEnter(), "only other case is MonitorEnter"); | |
419 } | |
420 } | |
421 if (!liveness.is_valid()) { | |
422 // Degenerate or breakpointed method. | |
423 bailout("Degenerate or breakpointed method"); | |
424 } else { | |
425 assert((int)liveness.size() == s->locals_size(), "error in use of liveness"); | |
426 for_each_local_value(s, index, value) { | |
427 assert(value->subst() == value, "missed substition"); | |
428 if (liveness.at(index) && !value->type()->is_illegal()) { | |
429 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { | |
430 walk(value); | |
431 assert(value->operand()->is_valid(), "must be evaluated now"); | |
432 } | |
433 } else { | |
434 // NULL out this local so that linear scan can assume that all non-NULL values are live. | |
435 s->invalidate_local(index); | |
436 } | |
437 } | |
438 } | |
439 } | |
440 | |
1819 | 441 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers()); |
0 | 442 } |
443 | |
444 | |
445 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) { | |
1819 | 446 return state_for(x, x->exception_state()); |
0 | 447 } |
448 | |
449 | |
450 void LIRGenerator::jobject2reg_with_patching(LIR_Opr r, ciObject* obj, CodeEmitInfo* info) { | |
451 if (!obj->is_loaded() || PatchALot) { | |
452 assert(info != NULL, "info must be set if class is not loaded"); | |
453 __ oop2reg_patch(NULL, r, info); | |
454 } else { | |
455 // no patching needed | |
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456 __ oop2reg(obj->constant_encoding(), r); |
0 | 457 } |
458 } | |
459 | |
460 | |
461 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index, | |
462 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) { | |
463 CodeStub* stub = new RangeCheckStub(range_check_info, index); | |
464 if (index->is_constant()) { | |
465 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(), | |
466 index->as_jint(), null_check_info); | |
467 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch | |
468 } else { | |
469 cmp_reg_mem(lir_cond_aboveEqual, index, array, | |
470 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info); | |
471 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch | |
472 } | |
473 } | |
474 | |
475 | |
476 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { | |
477 CodeStub* stub = new RangeCheckStub(info, index, true); | |
478 if (index->is_constant()) { | |
479 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info); | |
480 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch | |
481 } else { | |
482 cmp_reg_mem(lir_cond_aboveEqual, index, buffer, | |
483 java_nio_Buffer::limit_offset(), T_INT, info); | |
484 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch | |
485 } | |
486 __ move(index, result); | |
487 } | |
488 | |
489 | |
490 | |
491 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) { | |
492 LIR_Opr result_op = result; | |
493 LIR_Opr left_op = left; | |
494 LIR_Opr right_op = right; | |
495 | |
496 if (TwoOperandLIRForm && left_op != result_op) { | |
497 assert(right_op != result_op, "malformed"); | |
498 __ move(left_op, result_op); | |
499 left_op = result_op; | |
500 } | |
501 | |
502 switch(code) { | |
503 case Bytecodes::_dadd: | |
504 case Bytecodes::_fadd: | |
505 case Bytecodes::_ladd: | |
506 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break; | |
507 case Bytecodes::_fmul: | |
508 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break; | |
509 | |
510 case Bytecodes::_dmul: | |
511 { | |
512 if (is_strictfp) { | |
513 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break; | |
514 } else { | |
515 __ mul(left_op, right_op, result_op); break; | |
516 } | |
517 } | |
518 break; | |
519 | |
520 case Bytecodes::_imul: | |
521 { | |
522 bool did_strength_reduce = false; | |
523 | |
524 if (right->is_constant()) { | |
525 int c = right->as_jint(); | |
526 if (is_power_of_2(c)) { | |
527 // do not need tmp here | |
528 __ shift_left(left_op, exact_log2(c), result_op); | |
529 did_strength_reduce = true; | |
530 } else { | |
531 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op); | |
532 } | |
533 } | |
534 // we couldn't strength reduce so just emit the multiply | |
535 if (!did_strength_reduce) { | |
536 __ mul(left_op, right_op, result_op); | |
537 } | |
538 } | |
539 break; | |
540 | |
541 case Bytecodes::_dsub: | |
542 case Bytecodes::_fsub: | |
543 case Bytecodes::_lsub: | |
544 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break; | |
545 | |
546 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break; | |
547 // ldiv and lrem are implemented with a direct runtime call | |
548 | |
549 case Bytecodes::_ddiv: | |
550 { | |
551 if (is_strictfp) { | |
552 __ div_strictfp (left_op, right_op, result_op, tmp_op); break; | |
553 } else { | |
554 __ div (left_op, right_op, result_op); break; | |
555 } | |
556 } | |
557 break; | |
558 | |
559 case Bytecodes::_drem: | |
560 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break; | |
561 | |
562 default: ShouldNotReachHere(); | |
563 } | |
564 } | |
565 | |
566 | |
567 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) { | |
568 arithmetic_op(code, result, left, right, false, tmp); | |
569 } | |
570 | |
571 | |
572 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { | |
573 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info); | |
574 } | |
575 | |
576 | |
577 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) { | |
578 arithmetic_op(code, result, left, right, is_strictfp, tmp); | |
579 } | |
580 | |
581 | |
582 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) { | |
583 if (TwoOperandLIRForm && value != result_op) { | |
584 assert(count != result_op, "malformed"); | |
585 __ move(value, result_op); | |
586 value = result_op; | |
587 } | |
588 | |
589 assert(count->is_constant() || count->is_register(), "must be"); | |
590 switch(code) { | |
591 case Bytecodes::_ishl: | |
592 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break; | |
593 case Bytecodes::_ishr: | |
594 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break; | |
595 case Bytecodes::_iushr: | |
596 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break; | |
597 default: ShouldNotReachHere(); | |
598 } | |
599 } | |
600 | |
601 | |
602 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) { | |
603 if (TwoOperandLIRForm && left_op != result_op) { | |
604 assert(right_op != result_op, "malformed"); | |
605 __ move(left_op, result_op); | |
606 left_op = result_op; | |
607 } | |
608 | |
609 switch(code) { | |
610 case Bytecodes::_iand: | |
611 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break; | |
612 | |
613 case Bytecodes::_ior: | |
614 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break; | |
615 | |
616 case Bytecodes::_ixor: | |
617 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break; | |
618 | |
619 default: ShouldNotReachHere(); | |
620 } | |
621 } | |
622 | |
623 | |
624 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) { | |
625 if (!GenerateSynchronizationCode) return; | |
626 // for slow path, use debug info for state after successful locking | |
627 CodeStub* slow_path = new MonitorEnterStub(object, lock, info); | |
628 __ load_stack_address_monitor(monitor_no, lock); | |
629 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter | |
630 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception); | |
631 } | |
632 | |
633 | |
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634 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) { |
0 | 635 if (!GenerateSynchronizationCode) return; |
636 // setup registers | |
637 LIR_Opr hdr = lock; | |
638 lock = new_hdr; | |
639 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no); | |
640 __ load_stack_address_monitor(monitor_no, lock); | |
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641 __ unlock_object(hdr, object, lock, scratch, slow_path); |
0 | 642 } |
643 | |
644 | |
645 void LIRGenerator::new_instance(LIR_Opr dst, ciInstanceKlass* klass, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info) { | |
646 jobject2reg_with_patching(klass_reg, klass, info); | |
647 // If klass is not loaded we do not know if the klass has finalizers: | |
648 if (UseFastNewInstance && klass->is_loaded() | |
649 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) { | |
650 | |
651 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id; | |
652 | |
653 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id); | |
654 | |
655 assert(klass->is_loaded(), "must be loaded"); | |
656 // allocate space for instance | |
657 assert(klass->size_helper() >= 0, "illegal instance size"); | |
658 const int instance_size = align_object_size(klass->size_helper()); | |
659 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4, | |
660 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path); | |
661 } else { | |
662 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id); | |
663 __ branch(lir_cond_always, T_ILLEGAL, slow_path); | |
664 __ branch_destination(slow_path->continuation()); | |
665 } | |
666 } | |
667 | |
668 | |
669 static bool is_constant_zero(Instruction* inst) { | |
670 IntConstant* c = inst->type()->as_IntConstant(); | |
671 if (c) { | |
672 return (c->value() == 0); | |
673 } | |
674 return false; | |
675 } | |
676 | |
677 | |
678 static bool positive_constant(Instruction* inst) { | |
679 IntConstant* c = inst->type()->as_IntConstant(); | |
680 if (c) { | |
681 return (c->value() >= 0); | |
682 } | |
683 return false; | |
684 } | |
685 | |
686 | |
687 static ciArrayKlass* as_array_klass(ciType* type) { | |
688 if (type != NULL && type->is_array_klass() && type->is_loaded()) { | |
689 return (ciArrayKlass*)type; | |
690 } else { | |
691 return NULL; | |
692 } | |
693 } | |
694 | |
695 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) { | |
696 Instruction* src = x->argument_at(0); | |
697 Instruction* src_pos = x->argument_at(1); | |
698 Instruction* dst = x->argument_at(2); | |
699 Instruction* dst_pos = x->argument_at(3); | |
700 Instruction* length = x->argument_at(4); | |
701 | |
702 // first try to identify the likely type of the arrays involved | |
703 ciArrayKlass* expected_type = NULL; | |
704 bool is_exact = false; | |
705 { | |
706 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type()); | |
707 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type()); | |
708 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type()); | |
709 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type()); | |
710 if (src_exact_type != NULL && src_exact_type == dst_exact_type) { | |
711 // the types exactly match so the type is fully known | |
712 is_exact = true; | |
713 expected_type = src_exact_type; | |
714 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) { | |
715 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type; | |
716 ciArrayKlass* src_type = NULL; | |
717 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) { | |
718 src_type = (ciArrayKlass*) src_exact_type; | |
719 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) { | |
720 src_type = (ciArrayKlass*) src_declared_type; | |
721 } | |
722 if (src_type != NULL) { | |
723 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) { | |
724 is_exact = true; | |
725 expected_type = dst_type; | |
726 } | |
727 } | |
728 } | |
729 // at least pass along a good guess | |
730 if (expected_type == NULL) expected_type = dst_exact_type; | |
731 if (expected_type == NULL) expected_type = src_declared_type; | |
732 if (expected_type == NULL) expected_type = dst_declared_type; | |
733 } | |
734 | |
735 // if a probable array type has been identified, figure out if any | |
736 // of the required checks for a fast case can be elided. | |
737 int flags = LIR_OpArrayCopy::all_flags; | |
738 if (expected_type != NULL) { | |
739 // try to skip null checks | |
740 if (src->as_NewArray() != NULL) | |
741 flags &= ~LIR_OpArrayCopy::src_null_check; | |
742 if (dst->as_NewArray() != NULL) | |
743 flags &= ~LIR_OpArrayCopy::dst_null_check; | |
744 | |
745 // check from incoming constant values | |
746 if (positive_constant(src_pos)) | |
747 flags &= ~LIR_OpArrayCopy::src_pos_positive_check; | |
748 if (positive_constant(dst_pos)) | |
749 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check; | |
750 if (positive_constant(length)) | |
751 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
752 | |
753 // see if the range check can be elided, which might also imply | |
754 // that src or dst is non-null. | |
755 ArrayLength* al = length->as_ArrayLength(); | |
756 if (al != NULL) { | |
757 if (al->array() == src) { | |
758 // it's the length of the source array | |
759 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
760 flags &= ~LIR_OpArrayCopy::src_null_check; | |
761 if (is_constant_zero(src_pos)) | |
762 flags &= ~LIR_OpArrayCopy::src_range_check; | |
763 } | |
764 if (al->array() == dst) { | |
765 // it's the length of the destination array | |
766 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
767 flags &= ~LIR_OpArrayCopy::dst_null_check; | |
768 if (is_constant_zero(dst_pos)) | |
769 flags &= ~LIR_OpArrayCopy::dst_range_check; | |
770 } | |
771 } | |
772 if (is_exact) { | |
773 flags &= ~LIR_OpArrayCopy::type_check; | |
774 } | |
775 } | |
776 | |
777 if (src == dst) { | |
778 // moving within a single array so no type checks are needed | |
779 if (flags & LIR_OpArrayCopy::type_check) { | |
780 flags &= ~LIR_OpArrayCopy::type_check; | |
781 } | |
782 } | |
783 *flagsp = flags; | |
784 *expected_typep = (ciArrayKlass*)expected_type; | |
785 } | |
786 | |
787 | |
788 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) { | |
789 assert(opr->is_register(), "why spill if item is not register?"); | |
790 | |
791 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) { | |
792 LIR_Opr result = new_register(T_FLOAT); | |
793 set_vreg_flag(result, must_start_in_memory); | |
794 assert(opr->is_register(), "only a register can be spilled"); | |
795 assert(opr->value_type()->is_float(), "rounding only for floats available"); | |
796 __ roundfp(opr, LIR_OprFact::illegalOpr, result); | |
797 return result; | |
798 } | |
799 return opr; | |
800 } | |
801 | |
802 | |
803 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) { | |
804 assert(type2size[t] == type2size[value->type()], "size mismatch"); | |
805 if (!value->is_register()) { | |
806 // force into a register | |
807 LIR_Opr r = new_register(value->type()); | |
808 __ move(value, r); | |
809 value = r; | |
810 } | |
811 | |
812 // create a spill location | |
813 LIR_Opr tmp = new_register(t); | |
814 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory); | |
815 | |
816 // move from register to spill | |
817 __ move(value, tmp); | |
818 return tmp; | |
819 } | |
820 | |
821 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) { | |
822 if (if_instr->should_profile()) { | |
823 ciMethod* method = if_instr->profiled_method(); | |
824 assert(method != NULL, "method should be set if branch is profiled"); | |
825 ciMethodData* md = method->method_data(); | |
826 if (md == NULL) { | |
827 bailout("out of memory building methodDataOop"); | |
828 return; | |
829 } | |
830 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci()); | |
831 assert(data != NULL, "must have profiling data"); | |
832 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
833 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); | |
834 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); | |
1783 | 835 if (if_instr->is_swapped()) { |
836 int t = taken_count_offset; | |
837 taken_count_offset = not_taken_count_offset; | |
838 not_taken_count_offset = t; | |
839 } | |
840 | |
0 | 841 LIR_Opr md_reg = new_register(T_OBJECT); |
1783 | 842 __ oop2reg(md->constant_encoding(), md_reg); |
843 | |
844 LIR_Opr data_offset_reg = new_pointer_register(); | |
0 | 845 __ cmove(lir_cond(cond), |
1783 | 846 LIR_OprFact::intptrConst(taken_count_offset), |
847 LIR_OprFact::intptrConst(not_taken_count_offset), | |
0 | 848 data_offset_reg); |
1783 | 849 |
850 // MDO cells are intptr_t, so the data_reg width is arch-dependent. | |
851 LIR_Opr data_reg = new_pointer_register(); | |
852 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); | |
0 | 853 __ move(LIR_OprFact::address(data_addr), data_reg); |
1783 | 854 // Use leal instead of add to avoid destroying condition codes on x86 |
0 | 855 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT); |
856 __ leal(LIR_OprFact::address(fake_incr_value), data_reg); | |
857 __ move(data_reg, LIR_OprFact::address(data_addr)); | |
858 } | |
859 } | |
860 | |
861 // Phi technique: | |
862 // This is about passing live values from one basic block to the other. | |
863 // In code generated with Java it is rather rare that more than one | |
864 // value is on the stack from one basic block to the other. | |
865 // We optimize our technique for efficient passing of one value | |
866 // (of type long, int, double..) but it can be extended. | |
867 // When entering or leaving a basic block, all registers and all spill | |
868 // slots are release and empty. We use the released registers | |
869 // and spill slots to pass the live values from one block | |
870 // to the other. The topmost value, i.e., the value on TOS of expression | |
871 // stack is passed in registers. All other values are stored in spilling | |
872 // area. Every Phi has an index which designates its spill slot | |
873 // At exit of a basic block, we fill the register(s) and spill slots. | |
874 // At entry of a basic block, the block_prolog sets up the content of phi nodes | |
875 // and locks necessary registers and spilling slots. | |
876 | |
877 | |
878 // move current value to referenced phi function | |
879 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) { | |
880 Phi* phi = sux_val->as_Phi(); | |
881 // cur_val can be null without phi being null in conjunction with inlining | |
882 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) { | |
883 LIR_Opr operand = cur_val->operand(); | |
884 if (cur_val->operand()->is_illegal()) { | |
885 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL, | |
886 "these can be produced lazily"); | |
887 operand = operand_for_instruction(cur_val); | |
888 } | |
889 resolver->move(operand, operand_for_instruction(phi)); | |
890 } | |
891 } | |
892 | |
893 | |
894 // Moves all stack values into their PHI position | |
895 void LIRGenerator::move_to_phi(ValueStack* cur_state) { | |
896 BlockBegin* bb = block(); | |
897 if (bb->number_of_sux() == 1) { | |
898 BlockBegin* sux = bb->sux_at(0); | |
899 assert(sux->number_of_preds() > 0, "invalid CFG"); | |
900 | |
901 // a block with only one predecessor never has phi functions | |
902 if (sux->number_of_preds() > 1) { | |
903 int max_phis = cur_state->stack_size() + cur_state->locals_size(); | |
904 PhiResolver resolver(this, _virtual_register_number + max_phis * 2); | |
905 | |
906 ValueStack* sux_state = sux->state(); | |
907 Value sux_value; | |
908 int index; | |
909 | |
1819 | 910 assert(cur_state->scope() == sux_state->scope(), "not matching"); |
911 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching"); | |
912 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching"); | |
913 | |
0 | 914 for_each_stack_value(sux_state, index, sux_value) { |
915 move_to_phi(&resolver, cur_state->stack_at(index), sux_value); | |
916 } | |
917 | |
918 for_each_local_value(sux_state, index, sux_value) { | |
919 move_to_phi(&resolver, cur_state->local_at(index), sux_value); | |
920 } | |
921 | |
922 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal"); | |
923 } | |
924 } | |
925 } | |
926 | |
927 | |
928 LIR_Opr LIRGenerator::new_register(BasicType type) { | |
929 int vreg = _virtual_register_number; | |
930 // add a little fudge factor for the bailout, since the bailout is | |
931 // only checked periodically. This gives a few extra registers to | |
932 // hand out before we really run out, which helps us keep from | |
933 // tripping over assertions. | |
934 if (vreg + 20 >= LIR_OprDesc::vreg_max) { | |
935 bailout("out of virtual registers"); | |
936 if (vreg + 2 >= LIR_OprDesc::vreg_max) { | |
937 // wrap it around | |
938 _virtual_register_number = LIR_OprDesc::vreg_base; | |
939 } | |
940 } | |
941 _virtual_register_number += 1; | |
942 return LIR_OprFact::virtual_register(vreg, type); | |
943 } | |
944 | |
945 | |
946 // Try to lock using register in hint | |
947 LIR_Opr LIRGenerator::rlock(Value instr) { | |
948 return new_register(instr->type()); | |
949 } | |
950 | |
951 | |
952 // does an rlock and sets result | |
953 LIR_Opr LIRGenerator::rlock_result(Value x) { | |
954 LIR_Opr reg = rlock(x); | |
955 set_result(x, reg); | |
956 return reg; | |
957 } | |
958 | |
959 | |
960 // does an rlock and sets result | |
961 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) { | |
962 LIR_Opr reg; | |
963 switch (type) { | |
964 case T_BYTE: | |
965 case T_BOOLEAN: | |
966 reg = rlock_byte(type); | |
967 break; | |
968 default: | |
969 reg = rlock(x); | |
970 break; | |
971 } | |
972 | |
973 set_result(x, reg); | |
974 return reg; | |
975 } | |
976 | |
977 | |
978 //--------------------------------------------------------------------- | |
979 ciObject* LIRGenerator::get_jobject_constant(Value value) { | |
980 ObjectType* oc = value->type()->as_ObjectType(); | |
981 if (oc) { | |
982 return oc->constant_value(); | |
983 } | |
984 return NULL; | |
985 } | |
986 | |
987 | |
988 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) { | |
989 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block"); | |
990 assert(block()->next() == x, "ExceptionObject must be first instruction of block"); | |
991 | |
992 // no moves are created for phi functions at the begin of exception | |
993 // handlers, so assign operands manually here | |
994 for_each_phi_fun(block(), phi, | |
995 operand_for_instruction(phi)); | |
996 | |
997 LIR_Opr thread_reg = getThreadPointer(); | |
998 __ move(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT), | |
999 exceptionOopOpr()); | |
1000 __ move(LIR_OprFact::oopConst(NULL), | |
1001 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT)); | |
1002 __ move(LIR_OprFact::oopConst(NULL), | |
1003 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT)); | |
1004 | |
1005 LIR_Opr result = new_register(T_OBJECT); | |
1006 __ move(exceptionOopOpr(), result); | |
1007 set_result(x, result); | |
1008 } | |
1009 | |
1010 | |
1011 //---------------------------------------------------------------------- | |
1012 //---------------------------------------------------------------------- | |
1013 //---------------------------------------------------------------------- | |
1014 //---------------------------------------------------------------------- | |
1015 // visitor functions | |
1016 //---------------------------------------------------------------------- | |
1017 //---------------------------------------------------------------------- | |
1018 //---------------------------------------------------------------------- | |
1019 //---------------------------------------------------------------------- | |
1020 | |
1021 void LIRGenerator::do_Phi(Phi* x) { | |
1022 // phi functions are never visited directly | |
1023 ShouldNotReachHere(); | |
1024 } | |
1025 | |
1026 | |
1027 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined. | |
1028 void LIRGenerator::do_Constant(Constant* x) { | |
1819 | 1029 if (x->state_before() != NULL) { |
0 | 1030 // Any constant with a ValueStack requires patching so emit the patch here |
1031 LIR_Opr reg = rlock_result(x); | |
1819 | 1032 CodeEmitInfo* info = state_for(x, x->state_before()); |
0 | 1033 __ oop2reg_patch(NULL, reg, info); |
1034 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) { | |
1035 if (!x->is_pinned()) { | |
1036 // unpinned constants are handled specially so that they can be | |
1037 // put into registers when they are used multiple times within a | |
1038 // block. After the block completes their operand will be | |
1039 // cleared so that other blocks can't refer to that register. | |
1040 set_result(x, load_constant(x)); | |
1041 } else { | |
1042 LIR_Opr res = x->operand(); | |
1043 if (!res->is_valid()) { | |
1044 res = LIR_OprFact::value_type(x->type()); | |
1045 } | |
1046 if (res->is_constant()) { | |
1047 LIR_Opr reg = rlock_result(x); | |
1048 __ move(res, reg); | |
1049 } else { | |
1050 set_result(x, res); | |
1051 } | |
1052 } | |
1053 } else { | |
1054 set_result(x, LIR_OprFact::value_type(x->type())); | |
1055 } | |
1056 } | |
1057 | |
1058 | |
1059 void LIRGenerator::do_Local(Local* x) { | |
1060 // operand_for_instruction has the side effect of setting the result | |
1061 // so there's no need to do it here. | |
1062 operand_for_instruction(x); | |
1063 } | |
1064 | |
1065 | |
1066 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) { | |
1067 Unimplemented(); | |
1068 } | |
1069 | |
1070 | |
1071 void LIRGenerator::do_Return(Return* x) { | |
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1072 if (compilation()->env()->dtrace_method_probes()) { |
0 | 1073 BasicTypeList signature; |
1074 signature.append(T_INT); // thread | |
1075 signature.append(T_OBJECT); // methodOop | |
1076 LIR_OprList* args = new LIR_OprList(); | |
1077 args->append(getThreadPointer()); | |
1078 LIR_Opr meth = new_register(T_OBJECT); | |
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1079 __ oop2reg(method()->constant_encoding(), meth); |
0 | 1080 args->append(meth); |
1081 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL); | |
1082 } | |
1083 | |
1084 if (x->type()->is_void()) { | |
1085 __ return_op(LIR_OprFact::illegalOpr); | |
1086 } else { | |
1087 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true); | |
1088 LIRItem result(x->result(), this); | |
1089 | |
1090 result.load_item_force(reg); | |
1091 __ return_op(result.result()); | |
1092 } | |
1093 set_no_result(x); | |
1094 } | |
1095 | |
1096 | |
1097 // Example: object.getClass () | |
1098 void LIRGenerator::do_getClass(Intrinsic* x) { | |
1099 assert(x->number_of_arguments() == 1, "wrong type"); | |
1100 | |
1101 LIRItem rcvr(x->argument_at(0), this); | |
1102 rcvr.load_item(); | |
1103 LIR_Opr result = rlock_result(x); | |
1104 | |
1105 // need to perform the null check on the rcvr | |
1106 CodeEmitInfo* info = NULL; | |
1107 if (x->needs_null_check()) { | |
1819 | 1108 info = state_for(x); |
0 | 1109 } |
1110 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_OBJECT), result, info); | |
1111 __ move(new LIR_Address(result, Klass::java_mirror_offset_in_bytes() + | |
1112 klassOopDesc::klass_part_offset_in_bytes(), T_OBJECT), result); | |
1113 } | |
1114 | |
1115 | |
1116 // Example: Thread.currentThread() | |
1117 void LIRGenerator::do_currentThread(Intrinsic* x) { | |
1118 assert(x->number_of_arguments() == 0, "wrong type"); | |
1119 LIR_Opr reg = rlock_result(x); | |
1120 __ load(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg); | |
1121 } | |
1122 | |
1123 | |
1124 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) { | |
1125 assert(x->number_of_arguments() == 1, "wrong type"); | |
1126 LIRItem receiver(x->argument_at(0), this); | |
1127 | |
1128 receiver.load_item(); | |
1129 BasicTypeList signature; | |
1130 signature.append(T_OBJECT); // receiver | |
1131 LIR_OprList* args = new LIR_OprList(); | |
1132 args->append(receiver.result()); | |
1133 CodeEmitInfo* info = state_for(x, x->state()); | |
1134 call_runtime(&signature, args, | |
1135 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)), | |
1136 voidType, info); | |
1137 | |
1138 set_no_result(x); | |
1139 } | |
1140 | |
1141 | |
1142 //------------------------local access-------------------------------------- | |
1143 | |
1144 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) { | |
1145 if (x->operand()->is_illegal()) { | |
1146 Constant* c = x->as_Constant(); | |
1147 if (c != NULL) { | |
1148 x->set_operand(LIR_OprFact::value_type(c->type())); | |
1149 } else { | |
1150 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local"); | |
1151 // allocate a virtual register for this local or phi | |
1152 x->set_operand(rlock(x)); | |
1153 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL); | |
1154 } | |
1155 } | |
1156 return x->operand(); | |
1157 } | |
1158 | |
1159 | |
1160 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) { | |
1161 if (opr->is_virtual()) { | |
1162 return instruction_for_vreg(opr->vreg_number()); | |
1163 } | |
1164 return NULL; | |
1165 } | |
1166 | |
1167 | |
1168 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) { | |
1169 if (reg_num < _instruction_for_operand.length()) { | |
1170 return _instruction_for_operand.at(reg_num); | |
1171 } | |
1172 return NULL; | |
1173 } | |
1174 | |
1175 | |
1176 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) { | |
1177 if (_vreg_flags.size_in_bits() == 0) { | |
1178 BitMap2D temp(100, num_vreg_flags); | |
1179 temp.clear(); | |
1180 _vreg_flags = temp; | |
1181 } | |
1182 _vreg_flags.at_put_grow(vreg_num, f, true); | |
1183 } | |
1184 | |
1185 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) { | |
1186 if (!_vreg_flags.is_valid_index(vreg_num, f)) { | |
1187 return false; | |
1188 } | |
1189 return _vreg_flags.at(vreg_num, f); | |
1190 } | |
1191 | |
1192 | |
1193 // Block local constant handling. This code is useful for keeping | |
1194 // unpinned constants and constants which aren't exposed in the IR in | |
1195 // registers. Unpinned Constant instructions have their operands | |
1196 // cleared when the block is finished so that other blocks can't end | |
1197 // up referring to their registers. | |
1198 | |
1199 LIR_Opr LIRGenerator::load_constant(Constant* x) { | |
1200 assert(!x->is_pinned(), "only for unpinned constants"); | |
1201 _unpinned_constants.append(x); | |
1202 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr()); | |
1203 } | |
1204 | |
1205 | |
1206 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) { | |
1207 BasicType t = c->type(); | |
1208 for (int i = 0; i < _constants.length(); i++) { | |
1209 LIR_Const* other = _constants.at(i); | |
1210 if (t == other->type()) { | |
1211 switch (t) { | |
1212 case T_INT: | |
1213 case T_FLOAT: | |
1214 if (c->as_jint_bits() != other->as_jint_bits()) continue; | |
1215 break; | |
1216 case T_LONG: | |
1217 case T_DOUBLE: | |
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1218 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue; |
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1219 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue; |
0 | 1220 break; |
1221 case T_OBJECT: | |
1222 if (c->as_jobject() != other->as_jobject()) continue; | |
1223 break; | |
1224 } | |
1225 return _reg_for_constants.at(i); | |
1226 } | |
1227 } | |
1228 | |
1229 LIR_Opr result = new_register(t); | |
1230 __ move((LIR_Opr)c, result); | |
1231 _constants.append(c); | |
1232 _reg_for_constants.append(result); | |
1233 return result; | |
1234 } | |
1235 | |
1236 // Various barriers | |
1237 | |
342 | 1238 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, bool patch, CodeEmitInfo* info) { |
1239 // Do the pre-write barrier, if any. | |
1240 switch (_bs->kind()) { | |
1241 #ifndef SERIALGC | |
1242 case BarrierSet::G1SATBCT: | |
1243 case BarrierSet::G1SATBCTLogging: | |
1244 G1SATBCardTableModRef_pre_barrier(addr_opr, patch, info); | |
1245 break; | |
1246 #endif // SERIALGC | |
1247 case BarrierSet::CardTableModRef: | |
1248 case BarrierSet::CardTableExtension: | |
1249 // No pre barriers | |
1250 break; | |
1251 case BarrierSet::ModRef: | |
1252 case BarrierSet::Other: | |
1253 // No pre barriers | |
1254 break; | |
1255 default : | |
1256 ShouldNotReachHere(); | |
1257 | |
1258 } | |
1259 } | |
1260 | |
0 | 1261 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
342 | 1262 switch (_bs->kind()) { |
1263 #ifndef SERIALGC | |
1264 case BarrierSet::G1SATBCT: | |
1265 case BarrierSet::G1SATBCTLogging: | |
1266 G1SATBCardTableModRef_post_barrier(addr, new_val); | |
1267 break; | |
1268 #endif // SERIALGC | |
0 | 1269 case BarrierSet::CardTableModRef: |
1270 case BarrierSet::CardTableExtension: | |
1271 CardTableModRef_post_barrier(addr, new_val); | |
1272 break; | |
1273 case BarrierSet::ModRef: | |
1274 case BarrierSet::Other: | |
1275 // No post barriers | |
1276 break; | |
1277 default : | |
1278 ShouldNotReachHere(); | |
1279 } | |
1280 } | |
1281 | |
342 | 1282 //////////////////////////////////////////////////////////////////////// |
1283 #ifndef SERIALGC | |
1284 | |
1285 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, bool patch, CodeEmitInfo* info) { | |
1286 if (G1DisablePreBarrier) return; | |
1287 | |
1288 // First we test whether marking is in progress. | |
1289 BasicType flag_type; | |
1290 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
1291 flag_type = T_INT; | |
1292 } else { | |
1293 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, | |
1294 "Assumption"); | |
1295 flag_type = T_BYTE; | |
1296 } | |
1297 LIR_Opr thrd = getThreadPointer(); | |
1298 LIR_Address* mark_active_flag_addr = | |
1299 new LIR_Address(thrd, | |
1300 in_bytes(JavaThread::satb_mark_queue_offset() + | |
1301 PtrQueue::byte_offset_of_active()), | |
1302 flag_type); | |
1303 // Read the marking-in-progress flag. | |
1304 LIR_Opr flag_val = new_register(T_INT); | |
1305 __ load(mark_active_flag_addr, flag_val); | |
1306 | |
1307 LIR_PatchCode pre_val_patch_code = | |
1308 patch ? lir_patch_normal : lir_patch_none; | |
1309 | |
1310 LIR_Opr pre_val = new_register(T_OBJECT); | |
1311 | |
1312 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0)); | |
1313 if (!addr_opr->is_address()) { | |
1314 assert(addr_opr->is_register(), "must be"); | |
1572 | 1315 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT)); |
342 | 1316 } |
1317 CodeStub* slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, | |
1318 info); | |
1319 __ branch(lir_cond_notEqual, T_INT, slow); | |
1320 __ branch_destination(slow->continuation()); | |
1321 } | |
1322 | |
1323 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { | |
1324 if (G1DisablePostBarrier) return; | |
1325 | |
1326 // If the "new_val" is a constant NULL, no barrier is necessary. | |
1327 if (new_val->is_constant() && | |
1328 new_val->as_constant_ptr()->as_jobject() == NULL) return; | |
1329 | |
1330 if (!new_val->is_register()) { | |
1572 | 1331 LIR_Opr new_val_reg = new_register(T_OBJECT); |
342 | 1332 if (new_val->is_constant()) { |
1333 __ move(new_val, new_val_reg); | |
1334 } else { | |
1335 __ leal(new_val, new_val_reg); | |
1336 } | |
1337 new_val = new_val_reg; | |
1338 } | |
1339 assert(new_val->is_register(), "must be a register at this point"); | |
1340 | |
1341 if (addr->is_address()) { | |
1342 LIR_Address* address = addr->as_address_ptr(); | |
1572 | 1343 LIR_Opr ptr = new_register(T_OBJECT); |
342 | 1344 if (!address->index()->is_valid() && address->disp() == 0) { |
1345 __ move(address->base(), ptr); | |
1346 } else { | |
1347 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); | |
1348 __ leal(addr, ptr); | |
1349 } | |
1350 addr = ptr; | |
1351 } | |
1352 assert(addr->is_register(), "must be a register at this point"); | |
1353 | |
1354 LIR_Opr xor_res = new_pointer_register(); | |
1355 LIR_Opr xor_shift_res = new_pointer_register(); | |
1356 if (TwoOperandLIRForm ) { | |
1357 __ move(addr, xor_res); | |
1358 __ logical_xor(xor_res, new_val, xor_res); | |
1359 __ move(xor_res, xor_shift_res); | |
1360 __ unsigned_shift_right(xor_shift_res, | |
1361 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), | |
1362 xor_shift_res, | |
1363 LIR_OprDesc::illegalOpr()); | |
1364 } else { | |
1365 __ logical_xor(addr, new_val, xor_res); | |
1366 __ unsigned_shift_right(xor_res, | |
1367 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), | |
1368 xor_shift_res, | |
1369 LIR_OprDesc::illegalOpr()); | |
1370 } | |
1371 | |
1372 if (!new_val->is_register()) { | |
1572 | 1373 LIR_Opr new_val_reg = new_register(T_OBJECT); |
342 | 1374 __ leal(new_val, new_val_reg); |
1375 new_val = new_val_reg; | |
1376 } | |
1377 assert(new_val->is_register(), "must be a register at this point"); | |
1378 | |
1379 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD)); | |
1380 | |
1381 CodeStub* slow = new G1PostBarrierStub(addr, new_val); | |
1572 | 1382 __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow); |
342 | 1383 __ branch_destination(slow->continuation()); |
1384 } | |
1385 | |
1386 #endif // SERIALGC | |
1387 //////////////////////////////////////////////////////////////////////// | |
1388 | |
0 | 1389 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
1390 | |
342 | 1391 assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code"); |
1392 LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base); | |
0 | 1393 if (addr->is_address()) { |
1394 LIR_Address* address = addr->as_address_ptr(); | |
1395 LIR_Opr ptr = new_register(T_OBJECT); | |
1396 if (!address->index()->is_valid() && address->disp() == 0) { | |
1397 __ move(address->base(), ptr); | |
1398 } else { | |
1399 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); | |
1400 __ leal(addr, ptr); | |
1401 } | |
1402 addr = ptr; | |
1403 } | |
1404 assert(addr->is_register(), "must be a register at this point"); | |
1405 | |
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1406 #ifdef ARM |
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1407 // TODO: ARM - move to platform-dependent code |
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1408 LIR_Opr tmp = FrameMap::R14_opr; |
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1409 if (VM_Version::supports_movw()) { |
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1410 __ move((LIR_Opr)card_table_base, tmp); |
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1411 } else { |
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1412 __ move(new LIR_Address(FrameMap::Rthread_opr, in_bytes(JavaThread::card_table_base_offset()), T_ADDRESS), tmp); |
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1413 } |
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1414 |
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1415 CardTableModRefBS* ct = (CardTableModRefBS*)_bs; |
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1416 LIR_Address *card_addr = new LIR_Address(tmp, addr, (LIR_Address::Scale) -CardTableModRefBS::card_shift, 0, T_BYTE); |
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1417 if(((int)ct->byte_map_base & 0xff) == 0) { |
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1418 __ move(tmp, card_addr); |
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1419 } else { |
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1420 LIR_Opr tmp_zero = new_register(T_INT); |
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1421 __ move(LIR_OprFact::intConst(0), tmp_zero); |
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1422 __ move(tmp_zero, card_addr); |
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1423 } |
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1424 #else // ARM |
0 | 1425 LIR_Opr tmp = new_pointer_register(); |
1426 if (TwoOperandLIRForm) { | |
1427 __ move(addr, tmp); | |
1428 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp); | |
1429 } else { | |
1430 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp); | |
1431 } | |
1432 if (can_inline_as_constant(card_table_base)) { | |
1433 __ move(LIR_OprFact::intConst(0), | |
1434 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE)); | |
1435 } else { | |
1436 __ move(LIR_OprFact::intConst(0), | |
1437 new LIR_Address(tmp, load_constant(card_table_base), | |
1438 T_BYTE)); | |
1439 } | |
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1440 #endif // ARM |
0 | 1441 } |
1442 | |
1443 | |
1444 //------------------------field access-------------------------------------- | |
1445 | |
1446 // Comment copied form templateTable_i486.cpp | |
1447 // ---------------------------------------------------------------------------- | |
1448 // Volatile variables demand their effects be made known to all CPU's in | |
1449 // order. Store buffers on most chips allow reads & writes to reorder; the | |
1450 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of | |
1451 // memory barrier (i.e., it's not sufficient that the interpreter does not | |
1452 // reorder volatile references, the hardware also must not reorder them). | |
1453 // | |
1454 // According to the new Java Memory Model (JMM): | |
1455 // (1) All volatiles are serialized wrt to each other. | |
1456 // ALSO reads & writes act as aquire & release, so: | |
1457 // (2) A read cannot let unrelated NON-volatile memory refs that happen after | |
1458 // the read float up to before the read. It's OK for non-volatile memory refs | |
1459 // that happen before the volatile read to float down below it. | |
1460 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs | |
1461 // that happen BEFORE the write float down to after the write. It's OK for | |
1462 // non-volatile memory refs that happen after the volatile write to float up | |
1463 // before it. | |
1464 // | |
1465 // We only put in barriers around volatile refs (they are expensive), not | |
1466 // _between_ memory refs (that would require us to track the flavor of the | |
1467 // previous memory refs). Requirements (2) and (3) require some barriers | |
1468 // before volatile stores and after volatile loads. These nearly cover | |
1469 // requirement (1) but miss the volatile-store-volatile-load case. This final | |
1470 // case is placed after volatile-stores although it could just as well go | |
1471 // before volatile-loads. | |
1472 | |
1473 | |
1474 void LIRGenerator::do_StoreField(StoreField* x) { | |
1475 bool needs_patching = x->needs_patching(); | |
1476 bool is_volatile = x->field()->is_volatile(); | |
1477 BasicType field_type = x->field_type(); | |
1478 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT); | |
1479 | |
1480 CodeEmitInfo* info = NULL; | |
1481 if (needs_patching) { | |
1482 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); | |
1483 info = state_for(x, x->state_before()); | |
1484 } else if (x->needs_null_check()) { | |
1485 NullCheck* nc = x->explicit_null_check(); | |
1486 if (nc == NULL) { | |
1819 | 1487 info = state_for(x); |
0 | 1488 } else { |
1489 info = state_for(nc); | |
1490 } | |
1491 } | |
1492 | |
1493 | |
1494 LIRItem object(x->obj(), this); | |
1495 LIRItem value(x->value(), this); | |
1496 | |
1497 object.load_item(); | |
1498 | |
1499 if (is_volatile || needs_patching) { | |
1500 // load item if field is volatile (fewer special cases for volatiles) | |
1501 // load item if field not initialized | |
1502 // load item if field not constant | |
1503 // because of code patching we cannot inline constants | |
1504 if (field_type == T_BYTE || field_type == T_BOOLEAN) { | |
1505 value.load_byte_item(); | |
1506 } else { | |
1507 value.load_item(); | |
1508 } | |
1509 } else { | |
1510 value.load_for_store(field_type); | |
1511 } | |
1512 | |
1513 set_no_result(x); | |
1514 | |
1819 | 1515 #ifndef PRODUCT |
0 | 1516 if (PrintNotLoaded && needs_patching) { |
1517 tty->print_cr(" ###class not loaded at store_%s bci %d", | |
1819 | 1518 x->is_static() ? "static" : "field", x->printable_bci()); |
0 | 1519 } |
1819 | 1520 #endif |
0 | 1521 |
1522 if (x->needs_null_check() && | |
1523 (needs_patching || | |
1524 MacroAssembler::needs_explicit_null_check(x->offset()))) { | |
1525 // emit an explicit null check because the offset is too large | |
1526 __ null_check(object.result(), new CodeEmitInfo(info)); | |
1527 } | |
1528 | |
1529 LIR_Address* address; | |
1530 if (needs_patching) { | |
1531 // we need to patch the offset in the instruction so don't allow | |
1532 // generate_address to try to be smart about emitting the -1. | |
1533 // Otherwise the patching code won't know how to find the | |
1534 // instruction to patch. | |
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1535 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
0 | 1536 } else { |
1537 address = generate_address(object.result(), x->offset(), field_type); | |
1538 } | |
1539 | |
1540 if (is_volatile && os::is_MP()) { | |
1541 __ membar_release(); | |
1542 } | |
1543 | |
342 | 1544 if (is_oop) { |
1545 // Do the pre-write barrier, if any. | |
1546 pre_barrier(LIR_OprFact::address(address), | |
1547 needs_patching, | |
1548 (info ? new CodeEmitInfo(info) : NULL)); | |
1549 } | |
1550 | |
0 | 1551 if (is_volatile) { |
1552 assert(!needs_patching && x->is_loaded(), | |
1553 "how do we know it's volatile if it's not loaded"); | |
1554 volatile_field_store(value.result(), address, info); | |
1555 } else { | |
1556 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; | |
1557 __ store(value.result(), address, info, patch_code); | |
1558 } | |
1559 | |
1560 if (is_oop) { | |
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1561 // Store to object so mark the card of the header |
0 | 1562 post_barrier(object.result(), value.result()); |
1563 } | |
1564 | |
1565 if (is_volatile && os::is_MP()) { | |
1566 __ membar(); | |
1567 } | |
1568 } | |
1569 | |
1570 | |
1571 void LIRGenerator::do_LoadField(LoadField* x) { | |
1572 bool needs_patching = x->needs_patching(); | |
1573 bool is_volatile = x->field()->is_volatile(); | |
1574 BasicType field_type = x->field_type(); | |
1575 | |
1576 CodeEmitInfo* info = NULL; | |
1577 if (needs_patching) { | |
1578 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); | |
1579 info = state_for(x, x->state_before()); | |
1580 } else if (x->needs_null_check()) { | |
1581 NullCheck* nc = x->explicit_null_check(); | |
1582 if (nc == NULL) { | |
1819 | 1583 info = state_for(x); |
0 | 1584 } else { |
1585 info = state_for(nc); | |
1586 } | |
1587 } | |
1588 | |
1589 LIRItem object(x->obj(), this); | |
1590 | |
1591 object.load_item(); | |
1592 | |
1819 | 1593 #ifndef PRODUCT |
0 | 1594 if (PrintNotLoaded && needs_patching) { |
1595 tty->print_cr(" ###class not loaded at load_%s bci %d", | |
1819 | 1596 x->is_static() ? "static" : "field", x->printable_bci()); |
0 | 1597 } |
1819 | 1598 #endif |
0 | 1599 |
1600 if (x->needs_null_check() && | |
1601 (needs_patching || | |
1602 MacroAssembler::needs_explicit_null_check(x->offset()))) { | |
1603 // emit an explicit null check because the offset is too large | |
1604 __ null_check(object.result(), new CodeEmitInfo(info)); | |
1605 } | |
1606 | |
1607 LIR_Opr reg = rlock_result(x, field_type); | |
1608 LIR_Address* address; | |
1609 if (needs_patching) { | |
1610 // we need to patch the offset in the instruction so don't allow | |
1611 // generate_address to try to be smart about emitting the -1. | |
1612 // Otherwise the patching code won't know how to find the | |
1613 // instruction to patch. | |
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1614 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
0 | 1615 } else { |
1616 address = generate_address(object.result(), x->offset(), field_type); | |
1617 } | |
1618 | |
1619 if (is_volatile) { | |
1620 assert(!needs_patching && x->is_loaded(), | |
1621 "how do we know it's volatile if it's not loaded"); | |
1622 volatile_field_load(address, reg, info); | |
1623 } else { | |
1624 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; | |
1625 __ load(address, reg, info, patch_code); | |
1626 } | |
1627 | |
1628 if (is_volatile && os::is_MP()) { | |
1629 __ membar_acquire(); | |
1630 } | |
1631 } | |
1632 | |
1633 | |
1634 //------------------------java.nio.Buffer.checkIndex------------------------ | |
1635 | |
1636 // int java.nio.Buffer.checkIndex(int) | |
1637 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) { | |
1638 // NOTE: by the time we are in checkIndex() we are guaranteed that | |
1639 // the buffer is non-null (because checkIndex is package-private and | |
1640 // only called from within other methods in the buffer). | |
1641 assert(x->number_of_arguments() == 2, "wrong type"); | |
1642 LIRItem buf (x->argument_at(0), this); | |
1643 LIRItem index(x->argument_at(1), this); | |
1644 buf.load_item(); | |
1645 index.load_item(); | |
1646 | |
1647 LIR_Opr result = rlock_result(x); | |
1648 if (GenerateRangeChecks) { | |
1649 CodeEmitInfo* info = state_for(x); | |
1650 CodeStub* stub = new RangeCheckStub(info, index.result(), true); | |
1651 if (index.result()->is_constant()) { | |
1652 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info); | |
1653 __ branch(lir_cond_belowEqual, T_INT, stub); | |
1654 } else { | |
1655 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(), | |
1656 java_nio_Buffer::limit_offset(), T_INT, info); | |
1657 __ branch(lir_cond_aboveEqual, T_INT, stub); | |
1658 } | |
1659 __ move(index.result(), result); | |
1660 } else { | |
1661 // Just load the index into the result register | |
1662 __ move(index.result(), result); | |
1663 } | |
1664 } | |
1665 | |
1666 | |
1667 //------------------------array access-------------------------------------- | |
1668 | |
1669 | |
1670 void LIRGenerator::do_ArrayLength(ArrayLength* x) { | |
1671 LIRItem array(x->array(), this); | |
1672 array.load_item(); | |
1673 LIR_Opr reg = rlock_result(x); | |
1674 | |
1675 CodeEmitInfo* info = NULL; | |
1676 if (x->needs_null_check()) { | |
1677 NullCheck* nc = x->explicit_null_check(); | |
1678 if (nc == NULL) { | |
1679 info = state_for(x); | |
1680 } else { | |
1681 info = state_for(nc); | |
1682 } | |
1683 } | |
1684 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none); | |
1685 } | |
1686 | |
1687 | |
1688 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) { | |
1689 bool use_length = x->length() != NULL; | |
1690 LIRItem array(x->array(), this); | |
1691 LIRItem index(x->index(), this); | |
1692 LIRItem length(this); | |
1693 bool needs_range_check = true; | |
1694 | |
1695 if (use_length) { | |
1696 needs_range_check = x->compute_needs_range_check(); | |
1697 if (needs_range_check) { | |
1698 length.set_instruction(x->length()); | |
1699 length.load_item(); | |
1700 } | |
1701 } | |
1702 | |
1703 array.load_item(); | |
1704 if (index.is_constant() && can_inline_as_constant(x->index())) { | |
1705 // let it be a constant | |
1706 index.dont_load_item(); | |
1707 } else { | |
1708 index.load_item(); | |
1709 } | |
1710 | |
1711 CodeEmitInfo* range_check_info = state_for(x); | |
1712 CodeEmitInfo* null_check_info = NULL; | |
1713 if (x->needs_null_check()) { | |
1714 NullCheck* nc = x->explicit_null_check(); | |
1715 if (nc != NULL) { | |
1716 null_check_info = state_for(nc); | |
1717 } else { | |
1718 null_check_info = range_check_info; | |
1719 } | |
1720 } | |
1721 | |
1722 // emit array address setup early so it schedules better | |
1723 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false); | |
1724 | |
1725 if (GenerateRangeChecks && needs_range_check) { | |
1726 if (use_length) { | |
1727 // TODO: use a (modified) version of array_range_check that does not require a | |
1728 // constant length to be loaded to a register | |
1729 __ cmp(lir_cond_belowEqual, length.result(), index.result()); | |
1730 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); | |
1731 } else { | |
1732 array_range_check(array.result(), index.result(), null_check_info, range_check_info); | |
1733 // The range check performs the null check, so clear it out for the load | |
1734 null_check_info = NULL; | |
1735 } | |
1736 } | |
1737 | |
1738 __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info); | |
1739 } | |
1740 | |
1741 | |
1742 void LIRGenerator::do_NullCheck(NullCheck* x) { | |
1743 if (x->can_trap()) { | |
1744 LIRItem value(x->obj(), this); | |
1745 value.load_item(); | |
1746 CodeEmitInfo* info = state_for(x); | |
1747 __ null_check(value.result(), info); | |
1748 } | |
1749 } | |
1750 | |
1751 | |
1752 void LIRGenerator::do_Throw(Throw* x) { | |
1753 LIRItem exception(x->exception(), this); | |
1754 exception.load_item(); | |
1755 set_no_result(x); | |
1756 LIR_Opr exception_opr = exception.result(); | |
1757 CodeEmitInfo* info = state_for(x, x->state()); | |
1758 | |
1759 #ifndef PRODUCT | |
1760 if (PrintC1Statistics) { | |
1783 | 1761 increment_counter(Runtime1::throw_count_address(), T_INT); |
0 | 1762 } |
1763 #endif | |
1764 | |
1765 // check if the instruction has an xhandler in any of the nested scopes | |
1766 bool unwind = false; | |
1767 if (info->exception_handlers()->length() == 0) { | |
1768 // this throw is not inside an xhandler | |
1769 unwind = true; | |
1770 } else { | |
1771 // get some idea of the throw type | |
1772 bool type_is_exact = true; | |
1773 ciType* throw_type = x->exception()->exact_type(); | |
1774 if (throw_type == NULL) { | |
1775 type_is_exact = false; | |
1776 throw_type = x->exception()->declared_type(); | |
1777 } | |
1778 if (throw_type != NULL && throw_type->is_instance_klass()) { | |
1779 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type; | |
1780 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact); | |
1781 } | |
1782 } | |
1783 | |
1784 // do null check before moving exception oop into fixed register | |
1785 // to avoid a fixed interval with an oop during the null check. | |
1786 // Use a copy of the CodeEmitInfo because debug information is | |
1787 // different for null_check and throw. | |
1788 if (GenerateCompilerNullChecks && | |
1789 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) { | |
1790 // if the exception object wasn't created using new then it might be null. | |
1819 | 1791 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci()))); |
0 | 1792 } |
1793 | |
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1794 if (compilation()->env()->jvmti_can_post_on_exceptions()) { |
0 | 1795 // we need to go through the exception lookup path to get JVMTI |
1796 // notification done | |
1797 unwind = false; | |
1798 } | |
1799 | |
1800 // move exception oop into fixed register | |
1801 __ move(exception_opr, exceptionOopOpr()); | |
1802 | |
1803 if (unwind) { | |
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1804 __ unwind_exception(exceptionOopOpr()); |
0 | 1805 } else { |
1806 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info); | |
1807 } | |
1808 } | |
1809 | |
1810 | |
1811 void LIRGenerator::do_RoundFP(RoundFP* x) { | |
1812 LIRItem input(x->input(), this); | |
1813 input.load_item(); | |
1814 LIR_Opr input_opr = input.result(); | |
1815 assert(input_opr->is_register(), "why round if value is not in a register?"); | |
1816 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value"); | |
1817 if (input_opr->is_single_fpu()) { | |
1818 set_result(x, round_item(input_opr)); // This code path not currently taken | |
1819 } else { | |
1820 LIR_Opr result = new_register(T_DOUBLE); | |
1821 set_vreg_flag(result, must_start_in_memory); | |
1822 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result); | |
1823 set_result(x, result); | |
1824 } | |
1825 } | |
1826 | |
1827 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) { | |
1828 LIRItem base(x->base(), this); | |
1829 LIRItem idx(this); | |
1830 | |
1831 base.load_item(); | |
1832 if (x->has_index()) { | |
1833 idx.set_instruction(x->index()); | |
1834 idx.load_nonconstant(); | |
1835 } | |
1836 | |
1837 LIR_Opr reg = rlock_result(x, x->basic_type()); | |
1838 | |
1839 int log2_scale = 0; | |
1840 if (x->has_index()) { | |
1841 assert(x->index()->type()->tag() == intTag, "should not find non-int index"); | |
1842 log2_scale = x->log2_scale(); | |
1843 } | |
1844 | |
1845 assert(!x->has_index() || idx.value() == x->index(), "should match"); | |
1846 | |
1847 LIR_Opr base_op = base.result(); | |
1848 #ifndef _LP64 | |
1849 if (x->base()->type()->tag() == longTag) { | |
1850 base_op = new_register(T_INT); | |
1851 __ convert(Bytecodes::_l2i, base.result(), base_op); | |
1852 } else { | |
1853 assert(x->base()->type()->tag() == intTag, "must be"); | |
1854 } | |
1855 #endif | |
1856 | |
1857 BasicType dst_type = x->basic_type(); | |
1858 LIR_Opr index_op = idx.result(); | |
1859 | |
1860 LIR_Address* addr; | |
1861 if (index_op->is_constant()) { | |
1862 assert(log2_scale == 0, "must not have a scale"); | |
1863 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type); | |
1864 } else { | |
304 | 1865 #ifdef X86 |
1060 | 1866 #ifdef _LP64 |
1867 if (!index_op->is_illegal() && index_op->type() == T_INT) { | |
1868 LIR_Opr tmp = new_pointer_register(); | |
1869 __ convert(Bytecodes::_i2l, index_op, tmp); | |
1870 index_op = tmp; | |
1871 } | |
1872 #endif | |
0 | 1873 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type); |
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1875 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type); |
0 | 1876 #else |
1877 if (index_op->is_illegal() || log2_scale == 0) { | |
1060 | 1878 #ifdef _LP64 |
1879 if (!index_op->is_illegal() && index_op->type() == T_INT) { | |
1880 LIR_Opr tmp = new_pointer_register(); | |
1881 __ convert(Bytecodes::_i2l, index_op, tmp); | |
1882 index_op = tmp; | |
1883 } | |
1884 #endif | |
0 | 1885 addr = new LIR_Address(base_op, index_op, dst_type); |
1886 } else { | |
1060 | 1887 LIR_Opr tmp = new_pointer_register(); |
0 | 1888 __ shift_left(index_op, log2_scale, tmp); |
1889 addr = new LIR_Address(base_op, tmp, dst_type); | |
1890 } | |
1891 #endif | |
1892 } | |
1893 | |
1894 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) { | |
1895 __ unaligned_move(addr, reg); | |
1896 } else { | |
1897 __ move(addr, reg); | |
1898 } | |
1899 } | |
1900 | |
1901 | |
1902 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) { | |
1903 int log2_scale = 0; | |
1904 BasicType type = x->basic_type(); | |
1905 | |
1906 if (x->has_index()) { | |
1907 assert(x->index()->type()->tag() == intTag, "should not find non-int index"); | |
1908 log2_scale = x->log2_scale(); | |
1909 } | |
1910 | |
1911 LIRItem base(x->base(), this); | |
1912 LIRItem value(x->value(), this); | |
1913 LIRItem idx(this); | |
1914 | |
1915 base.load_item(); | |
1916 if (x->has_index()) { | |
1917 idx.set_instruction(x->index()); | |
1918 idx.load_item(); | |
1919 } | |
1920 | |
1921 if (type == T_BYTE || type == T_BOOLEAN) { | |
1922 value.load_byte_item(); | |
1923 } else { | |
1924 value.load_item(); | |
1925 } | |
1926 | |
1927 set_no_result(x); | |
1928 | |
1929 LIR_Opr base_op = base.result(); | |
1930 #ifndef _LP64 | |
1931 if (x->base()->type()->tag() == longTag) { | |
1932 base_op = new_register(T_INT); | |
1933 __ convert(Bytecodes::_l2i, base.result(), base_op); | |
1934 } else { | |
1935 assert(x->base()->type()->tag() == intTag, "must be"); | |
1936 } | |
1937 #endif | |
1938 | |
1939 LIR_Opr index_op = idx.result(); | |
1940 if (log2_scale != 0) { | |
1941 // temporary fix (platform dependent code without shift on Intel would be better) | |
1060 | 1942 index_op = new_pointer_register(); |
1943 #ifdef _LP64 | |
1944 if(idx.result()->type() == T_INT) { | |
1945 __ convert(Bytecodes::_i2l, idx.result(), index_op); | |
1946 } else { | |
1947 #endif | |
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1948 // TODO: ARM also allows embedded shift in the address |
1060 | 1949 __ move(idx.result(), index_op); |
1950 #ifdef _LP64 | |
1951 } | |
1952 #endif | |
0 | 1953 __ shift_left(index_op, log2_scale, index_op); |
1954 } | |
1060 | 1955 #ifdef _LP64 |
1956 else if(!index_op->is_illegal() && index_op->type() == T_INT) { | |
1957 LIR_Opr tmp = new_pointer_register(); | |
1958 __ convert(Bytecodes::_i2l, index_op, tmp); | |
1959 index_op = tmp; | |
1960 } | |
1961 #endif | |
0 | 1962 |
1963 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type()); | |
1964 __ move(value.result(), addr); | |
1965 } | |
1966 | |
1967 | |
1968 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) { | |
1969 BasicType type = x->basic_type(); | |
1970 LIRItem src(x->object(), this); | |
1971 LIRItem off(x->offset(), this); | |
1972 | |
1973 off.load_item(); | |
1974 src.load_item(); | |
1975 | |
1976 LIR_Opr reg = reg = rlock_result(x, x->basic_type()); | |
1977 | |
1978 if (x->is_volatile() && os::is_MP()) __ membar_acquire(); | |
1979 get_Object_unsafe(reg, src.result(), off.result(), type, x->is_volatile()); | |
1980 if (x->is_volatile() && os::is_MP()) __ membar(); | |
1981 } | |
1982 | |
1983 | |
1984 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) { | |
1985 BasicType type = x->basic_type(); | |
1986 LIRItem src(x->object(), this); | |
1987 LIRItem off(x->offset(), this); | |
1988 LIRItem data(x->value(), this); | |
1989 | |
1990 src.load_item(); | |
1991 if (type == T_BOOLEAN || type == T_BYTE) { | |
1992 data.load_byte_item(); | |
1993 } else { | |
1994 data.load_item(); | |
1995 } | |
1996 off.load_item(); | |
1997 | |
1998 set_no_result(x); | |
1999 | |
2000 if (x->is_volatile() && os::is_MP()) __ membar_release(); | |
2001 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile()); | |
2002 } | |
2003 | |
2004 | |
2005 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) { | |
2006 LIRItem src(x->object(), this); | |
2007 LIRItem off(x->offset(), this); | |
2008 | |
2009 src.load_item(); | |
2010 if (off.is_constant() && can_inline_as_constant(x->offset())) { | |
2011 // let it be a constant | |
2012 off.dont_load_item(); | |
2013 } else { | |
2014 off.load_item(); | |
2015 } | |
2016 | |
2017 set_no_result(x); | |
2018 | |
2019 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE); | |
2020 __ prefetch(addr, is_store); | |
2021 } | |
2022 | |
2023 | |
2024 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) { | |
2025 do_UnsafePrefetch(x, false); | |
2026 } | |
2027 | |
2028 | |
2029 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) { | |
2030 do_UnsafePrefetch(x, true); | |
2031 } | |
2032 | |
2033 | |
2034 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) { | |
2035 int lng = x->length(); | |
2036 | |
2037 for (int i = 0; i < lng; i++) { | |
2038 SwitchRange* one_range = x->at(i); | |
2039 int low_key = one_range->low_key(); | |
2040 int high_key = one_range->high_key(); | |
2041 BlockBegin* dest = one_range->sux(); | |
2042 if (low_key == high_key) { | |
2043 __ cmp(lir_cond_equal, value, low_key); | |
2044 __ branch(lir_cond_equal, T_INT, dest); | |
2045 } else if (high_key - low_key == 1) { | |
2046 __ cmp(lir_cond_equal, value, low_key); | |
2047 __ branch(lir_cond_equal, T_INT, dest); | |
2048 __ cmp(lir_cond_equal, value, high_key); | |
2049 __ branch(lir_cond_equal, T_INT, dest); | |
2050 } else { | |
2051 LabelObj* L = new LabelObj(); | |
2052 __ cmp(lir_cond_less, value, low_key); | |
2053 __ branch(lir_cond_less, L->label()); | |
2054 __ cmp(lir_cond_lessEqual, value, high_key); | |
2055 __ branch(lir_cond_lessEqual, T_INT, dest); | |
2056 __ branch_destination(L->label()); | |
2057 } | |
2058 } | |
2059 __ jump(default_sux); | |
2060 } | |
2061 | |
2062 | |
2063 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) { | |
2064 SwitchRangeList* res = new SwitchRangeList(); | |
2065 int len = x->length(); | |
2066 if (len > 0) { | |
2067 BlockBegin* sux = x->sux_at(0); | |
2068 int key = x->lo_key(); | |
2069 BlockBegin* default_sux = x->default_sux(); | |
2070 SwitchRange* range = new SwitchRange(key, sux); | |
2071 for (int i = 0; i < len; i++, key++) { | |
2072 BlockBegin* new_sux = x->sux_at(i); | |
2073 if (sux == new_sux) { | |
2074 // still in same range | |
2075 range->set_high_key(key); | |
2076 } else { | |
2077 // skip tests which explicitly dispatch to the default | |
2078 if (sux != default_sux) { | |
2079 res->append(range); | |
2080 } | |
2081 range = new SwitchRange(key, new_sux); | |
2082 } | |
2083 sux = new_sux; | |
2084 } | |
2085 if (res->length() == 0 || res->last() != range) res->append(range); | |
2086 } | |
2087 return res; | |
2088 } | |
2089 | |
2090 | |
2091 // we expect the keys to be sorted by increasing value | |
2092 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) { | |
2093 SwitchRangeList* res = new SwitchRangeList(); | |
2094 int len = x->length(); | |
2095 if (len > 0) { | |
2096 BlockBegin* default_sux = x->default_sux(); | |
2097 int key = x->key_at(0); | |
2098 BlockBegin* sux = x->sux_at(0); | |
2099 SwitchRange* range = new SwitchRange(key, sux); | |
2100 for (int i = 1; i < len; i++) { | |
2101 int new_key = x->key_at(i); | |
2102 BlockBegin* new_sux = x->sux_at(i); | |
2103 if (key+1 == new_key && sux == new_sux) { | |
2104 // still in same range | |
2105 range->set_high_key(new_key); | |
2106 } else { | |
2107 // skip tests which explicitly dispatch to the default | |
2108 if (range->sux() != default_sux) { | |
2109 res->append(range); | |
2110 } | |
2111 range = new SwitchRange(new_key, new_sux); | |
2112 } | |
2113 key = new_key; | |
2114 sux = new_sux; | |
2115 } | |
2116 if (res->length() == 0 || res->last() != range) res->append(range); | |
2117 } | |
2118 return res; | |
2119 } | |
2120 | |
2121 | |
2122 void LIRGenerator::do_TableSwitch(TableSwitch* x) { | |
2123 LIRItem tag(x->tag(), this); | |
2124 tag.load_item(); | |
2125 set_no_result(x); | |
2126 | |
2127 if (x->is_safepoint()) { | |
2128 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); | |
2129 } | |
2130 | |
2131 // move values into phi locations | |
2132 move_to_phi(x->state()); | |
2133 | |
2134 int lo_key = x->lo_key(); | |
2135 int hi_key = x->hi_key(); | |
2136 int len = x->length(); | |
2137 LIR_Opr value = tag.result(); | |
2138 if (UseTableRanges) { | |
2139 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); | |
2140 } else { | |
2141 for (int i = 0; i < len; i++) { | |
2142 __ cmp(lir_cond_equal, value, i + lo_key); | |
2143 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); | |
2144 } | |
2145 __ jump(x->default_sux()); | |
2146 } | |
2147 } | |
2148 | |
2149 | |
2150 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) { | |
2151 LIRItem tag(x->tag(), this); | |
2152 tag.load_item(); | |
2153 set_no_result(x); | |
2154 | |
2155 if (x->is_safepoint()) { | |
2156 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); | |
2157 } | |
2158 | |
2159 // move values into phi locations | |
2160 move_to_phi(x->state()); | |
2161 | |
2162 LIR_Opr value = tag.result(); | |
2163 if (UseTableRanges) { | |
2164 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); | |
2165 } else { | |
2166 int len = x->length(); | |
2167 for (int i = 0; i < len; i++) { | |
2168 __ cmp(lir_cond_equal, value, x->key_at(i)); | |
2169 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); | |
2170 } | |
2171 __ jump(x->default_sux()); | |
2172 } | |
2173 } | |
2174 | |
2175 | |
2176 void LIRGenerator::do_Goto(Goto* x) { | |
2177 set_no_result(x); | |
2178 | |
2179 if (block()->next()->as_OsrEntry()) { | |
2180 // need to free up storage used for OSR entry point | |
2181 LIR_Opr osrBuffer = block()->next()->operand(); | |
2182 BasicTypeList signature; | |
2183 signature.append(T_INT); | |
2184 CallingConvention* cc = frame_map()->c_calling_convention(&signature); | |
2185 __ move(osrBuffer, cc->args()->at(0)); | |
2186 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end), | |
2187 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args()); | |
2188 } | |
2189 | |
2190 if (x->is_safepoint()) { | |
2191 ValueStack* state = x->state_before() ? x->state_before() : x->state(); | |
2192 | |
2193 // increment backedge counter if needed | |
1783 | 2194 CodeEmitInfo* info = state_for(x, state); |
1819 | 2195 increment_backedge_counter(info, info->stack()->bci()); |
0 | 2196 CodeEmitInfo* safepoint_info = state_for(x, state); |
2197 __ safepoint(safepoint_poll_register(), safepoint_info); | |
2198 } | |
2199 | |
1783 | 2200 // Gotos can be folded Ifs, handle this case. |
2201 if (x->should_profile()) { | |
2202 ciMethod* method = x->profiled_method(); | |
2203 assert(method != NULL, "method should be set if branch is profiled"); | |
2204 ciMethodData* md = method->method_data(); | |
2205 if (md == NULL) { | |
2206 bailout("out of memory building methodDataOop"); | |
2207 return; | |
2208 } | |
2209 ciProfileData* data = md->bci_to_data(x->profiled_bci()); | |
2210 assert(data != NULL, "must have profiling data"); | |
2211 int offset; | |
2212 if (x->direction() == Goto::taken) { | |
2213 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
2214 offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); | |
2215 } else if (x->direction() == Goto::not_taken) { | |
2216 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
2217 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); | |
2218 } else { | |
2219 assert(data->is_JumpData(), "need JumpData for branches"); | |
2220 offset = md->byte_offset_of_slot(data, JumpData::taken_offset()); | |
2221 } | |
2222 LIR_Opr md_reg = new_register(T_OBJECT); | |
2223 __ oop2reg(md->constant_encoding(), md_reg); | |
2224 | |
2225 increment_counter(new LIR_Address(md_reg, offset, | |
2226 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment); | |
2227 } | |
2228 | |
0 | 2229 // emit phi-instruction move after safepoint since this simplifies |
2230 // describing the state as the safepoint. | |
2231 move_to_phi(x->state()); | |
2232 | |
2233 __ jump(x->default_sux()); | |
2234 } | |
2235 | |
2236 | |
2237 void LIRGenerator::do_Base(Base* x) { | |
2238 __ std_entry(LIR_OprFact::illegalOpr); | |
2239 // Emit moves from physical registers / stack slots to virtual registers | |
2240 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); | |
2241 IRScope* irScope = compilation()->hir()->top_scope(); | |
2242 int java_index = 0; | |
2243 for (int i = 0; i < args->length(); i++) { | |
2244 LIR_Opr src = args->at(i); | |
2245 assert(!src->is_illegal(), "check"); | |
2246 BasicType t = src->type(); | |
2247 | |
2248 // Types which are smaller than int are passed as int, so | |
2249 // correct the type which passed. | |
2250 switch (t) { | |
2251 case T_BYTE: | |
2252 case T_BOOLEAN: | |
2253 case T_SHORT: | |
2254 case T_CHAR: | |
2255 t = T_INT; | |
2256 break; | |
2257 } | |
2258 | |
2259 LIR_Opr dest = new_register(t); | |
2260 __ move(src, dest); | |
2261 | |
2262 // Assign new location to Local instruction for this local | |
2263 Local* local = x->state()->local_at(java_index)->as_Local(); | |
2264 assert(local != NULL, "Locals for incoming arguments must have been created"); | |
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2265 #ifndef __SOFTFP__ |
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2266 // The java calling convention passes double as long and float as int. |
0 | 2267 assert(as_ValueType(t)->tag() == local->type()->tag(), "check"); |
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2268 #endif // __SOFTFP__ |
0 | 2269 local->set_operand(dest); |
2270 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL); | |
2271 java_index += type2size[t]; | |
2272 } | |
2273 | |
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2274 if (compilation()->env()->dtrace_method_probes()) { |
0 | 2275 BasicTypeList signature; |
2276 signature.append(T_INT); // thread | |
2277 signature.append(T_OBJECT); // methodOop | |
2278 LIR_OprList* args = new LIR_OprList(); | |
2279 args->append(getThreadPointer()); | |
2280 LIR_Opr meth = new_register(T_OBJECT); | |
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2281 __ oop2reg(method()->constant_encoding(), meth); |
0 | 2282 args->append(meth); |
2283 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL); | |
2284 } | |
2285 | |
2286 if (method()->is_synchronized()) { | |
2287 LIR_Opr obj; | |
2288 if (method()->is_static()) { | |
2289 obj = new_register(T_OBJECT); | |
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2290 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj); |
0 | 2291 } else { |
2292 Local* receiver = x->state()->local_at(0)->as_Local(); | |
2293 assert(receiver != NULL, "must already exist"); | |
2294 obj = receiver->operand(); | |
2295 } | |
2296 assert(obj->is_valid(), "must be valid"); | |
2297 | |
2298 if (method()->is_synchronized() && GenerateSynchronizationCode) { | |
2299 LIR_Opr lock = new_register(T_INT); | |
2300 __ load_stack_address_monitor(0, lock); | |
2301 | |
1819 | 2302 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL); |
0 | 2303 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info); |
2304 | |
2305 // receiver is guaranteed non-NULL so don't need CodeEmitInfo | |
2306 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL); | |
2307 } | |
2308 } | |
2309 | |
2310 // increment invocation counters if needed | |
1783 | 2311 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting. |
1825 | 2312 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL); |
1783 | 2313 increment_invocation_counter(info); |
2314 } | |
0 | 2315 |
2316 // all blocks with a successor must end with an unconditional jump | |
2317 // to the successor even if they are consecutive | |
2318 __ jump(x->default_sux()); | |
2319 } | |
2320 | |
2321 | |
2322 void LIRGenerator::do_OsrEntry(OsrEntry* x) { | |
2323 // construct our frame and model the production of incoming pointer | |
2324 // to the OSR buffer. | |
2325 __ osr_entry(LIR_Assembler::osrBufferPointer()); | |
2326 LIR_Opr result = rlock_result(x); | |
2327 __ move(LIR_Assembler::osrBufferPointer(), result); | |
2328 } | |
2329 | |
2330 | |
2331 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) { | |
1295 | 2332 int i = (x->has_receiver() || x->is_invokedynamic()) ? 1 : 0; |
0 | 2333 for (; i < args->length(); i++) { |
2334 LIRItem* param = args->at(i); | |
2335 LIR_Opr loc = arg_list->at(i); | |
2336 if (loc->is_register()) { | |
2337 param->load_item_force(loc); | |
2338 } else { | |
2339 LIR_Address* addr = loc->as_address_ptr(); | |
2340 param->load_for_store(addr->type()); | |
2341 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
2342 __ unaligned_move(param->result(), addr); | |
2343 } else { | |
2344 __ move(param->result(), addr); | |
2345 } | |
2346 } | |
2347 } | |
2348 | |
2349 if (x->has_receiver()) { | |
2350 LIRItem* receiver = args->at(0); | |
2351 LIR_Opr loc = arg_list->at(0); | |
2352 if (loc->is_register()) { | |
2353 receiver->load_item_force(loc); | |
2354 } else { | |
2355 assert(loc->is_address(), "just checking"); | |
2356 receiver->load_for_store(T_OBJECT); | |
2357 __ move(receiver->result(), loc); | |
2358 } | |
2359 } | |
2360 } | |
2361 | |
2362 | |
2363 // Visits all arguments, returns appropriate items without loading them | |
2364 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) { | |
2365 LIRItemList* argument_items = new LIRItemList(); | |
2366 if (x->has_receiver()) { | |
2367 LIRItem* receiver = new LIRItem(x->receiver(), this); | |
2368 argument_items->append(receiver); | |
2369 } | |
1295 | 2370 if (x->is_invokedynamic()) { |
2371 // Insert a dummy for the synthetic MethodHandle argument. | |
2372 argument_items->append(NULL); | |
2373 } | |
0 | 2374 int idx = x->has_receiver() ? 1 : 0; |
2375 for (int i = 0; i < x->number_of_arguments(); i++) { | |
2376 LIRItem* param = new LIRItem(x->argument_at(i), this); | |
2377 argument_items->append(param); | |
2378 idx += (param->type()->is_double_word() ? 2 : 1); | |
2379 } | |
2380 return argument_items; | |
2381 } | |
2382 | |
2383 | |
2384 // The invoke with receiver has following phases: | |
2385 // a) traverse and load/lock receiver; | |
2386 // b) traverse all arguments -> item-array (invoke_visit_argument) | |
2387 // c) push receiver on stack | |
2388 // d) load each of the items and push on stack | |
2389 // e) unlock receiver | |
2390 // f) move receiver into receiver-register %o0 | |
2391 // g) lock result registers and emit call operation | |
2392 // | |
2393 // Before issuing a call, we must spill-save all values on stack | |
2394 // that are in caller-save register. "spill-save" moves thos registers | |
2395 // either in a free callee-save register or spills them if no free | |
2396 // callee save register is available. | |
2397 // | |
2398 // The problem is where to invoke spill-save. | |
2399 // - if invoked between e) and f), we may lock callee save | |
2400 // register in "spill-save" that destroys the receiver register | |
2401 // before f) is executed | |
2402 // - if we rearange the f) to be earlier, by loading %o0, it | |
2403 // may destroy a value on the stack that is currently in %o0 | |
2404 // and is waiting to be spilled | |
2405 // - if we keep the receiver locked while doing spill-save, | |
2406 // we cannot spill it as it is spill-locked | |
2407 // | |
2408 void LIRGenerator::do_Invoke(Invoke* x) { | |
2409 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true); | |
2410 | |
2411 LIR_OprList* arg_list = cc->args(); | |
2412 LIRItemList* args = invoke_visit_arguments(x); | |
2413 LIR_Opr receiver = LIR_OprFact::illegalOpr; | |
2414 | |
2415 // setup result register | |
2416 LIR_Opr result_register = LIR_OprFact::illegalOpr; | |
2417 if (x->type() != voidType) { | |
2418 result_register = result_register_for(x->type()); | |
2419 } | |
2420 | |
2421 CodeEmitInfo* info = state_for(x, x->state()); | |
2422 | |
1295 | 2423 // invokedynamics can deoptimize. |
1304 | 2424 CodeEmitInfo* deopt_info = x->is_invokedynamic() ? state_for(x, x->state_before()) : NULL; |
1295 | 2425 |
0 | 2426 invoke_load_arguments(x, args, arg_list); |
2427 | |
2428 if (x->has_receiver()) { | |
2429 args->at(0)->load_item_force(LIR_Assembler::receiverOpr()); | |
2430 receiver = args->at(0)->result(); | |
2431 } | |
2432 | |
2433 // emit invoke code | |
2434 bool optimized = x->target_is_loaded() && x->target_is_final(); | |
2435 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match"); | |
2436 | |
1564 | 2437 // JSR 292 |
2438 // Preserve the SP over MethodHandle call sites. | |
2439 ciMethod* target = x->target(); | |
2440 if (target->is_method_handle_invoke()) { | |
2441 info->set_is_method_handle_invoke(true); | |
2442 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr()); | |
2443 } | |
2444 | |
0 | 2445 switch (x->code()) { |
2446 case Bytecodes::_invokestatic: | |
1564 | 2447 __ call_static(target, result_register, |
0 | 2448 SharedRuntime::get_resolve_static_call_stub(), |
2449 arg_list, info); | |
2450 break; | |
2451 case Bytecodes::_invokespecial: | |
2452 case Bytecodes::_invokevirtual: | |
2453 case Bytecodes::_invokeinterface: | |
2454 // for final target we still produce an inline cache, in order | |
2455 // to be able to call mixed mode | |
2456 if (x->code() == Bytecodes::_invokespecial || optimized) { | |
1564 | 2457 __ call_opt_virtual(target, receiver, result_register, |
0 | 2458 SharedRuntime::get_resolve_opt_virtual_call_stub(), |
2459 arg_list, info); | |
2460 } else if (x->vtable_index() < 0) { | |
1564 | 2461 __ call_icvirtual(target, receiver, result_register, |
0 | 2462 SharedRuntime::get_resolve_virtual_call_stub(), |
2463 arg_list, info); | |
2464 } else { | |
2465 int entry_offset = instanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size(); | |
2466 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes(); | |
1564 | 2467 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info); |
0 | 2468 } |
2469 break; | |
1295 | 2470 case Bytecodes::_invokedynamic: { |
2471 ciBytecodeStream bcs(x->scope()->method()); | |
1819 | 2472 bcs.force_bci(x->state()->bci()); |
1295 | 2473 assert(bcs.cur_bc() == Bytecodes::_invokedynamic, "wrong stream"); |
2474 ciCPCache* cpcache = bcs.get_cpcache(); | |
2475 | |
2476 // Get CallSite offset from constant pool cache pointer. | |
2477 int index = bcs.get_method_index(); | |
2478 size_t call_site_offset = cpcache->get_f1_offset(index); | |
2479 | |
2480 // If this invokedynamic call site hasn't been executed yet in | |
2481 // the interpreter, the CallSite object in the constant pool | |
2482 // cache is still null and we need to deoptimize. | |
2483 if (cpcache->is_f1_null_at(index)) { | |
2484 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so | |
2485 // clone all handlers. This is handled transparently in other | |
2486 // places by the CodeEmitInfo cloning logic but is handled | |
2487 // specially here because a stub isn't being used. | |
2488 x->set_exception_handlers(new XHandlers(x->exception_handlers())); | |
2489 | |
2490 DeoptimizeStub* deopt_stub = new DeoptimizeStub(deopt_info); | |
2491 __ jump(deopt_stub); | |
2492 } | |
2493 | |
2494 // Use the receiver register for the synthetic MethodHandle | |
2495 // argument. | |
2496 receiver = LIR_Assembler::receiverOpr(); | |
2497 LIR_Opr tmp = new_register(objectType); | |
2498 | |
2499 // Load CallSite object from constant pool cache. | |
2500 __ oop2reg(cpcache->constant_encoding(), tmp); | |
2501 __ load(new LIR_Address(tmp, call_site_offset, T_OBJECT), tmp); | |
2502 | |
2503 // Load target MethodHandle from CallSite object. | |
2504 __ load(new LIR_Address(tmp, java_dyn_CallSite::target_offset_in_bytes(), T_OBJECT), receiver); | |
2505 | |
1564 | 2506 __ call_dynamic(target, receiver, result_register, |
1295 | 2507 SharedRuntime::get_resolve_opt_virtual_call_stub(), |
2508 arg_list, info); | |
2509 break; | |
2510 } | |
0 | 2511 default: |
2512 ShouldNotReachHere(); | |
2513 break; | |
2514 } | |
2515 | |
1564 | 2516 // JSR 292 |
2517 // Restore the SP after MethodHandle call sites. | |
2518 if (target->is_method_handle_invoke()) { | |
2519 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer()); | |
2520 } | |
2521 | |
0 | 2522 if (x->type()->is_float() || x->type()->is_double()) { |
2523 // Force rounding of results from non-strictfp when in strictfp | |
2524 // scope (or when we don't know the strictness of the callee, to | |
2525 // be safe.) | |
2526 if (method()->is_strict()) { | |
2527 if (!x->target_is_loaded() || !x->target_is_strictfp()) { | |
2528 result_register = round_item(result_register); | |
2529 } | |
2530 } | |
2531 } | |
2532 | |
2533 if (result_register->is_valid()) { | |
2534 LIR_Opr result = rlock_result(x); | |
2535 __ move(result_register, result); | |
2536 } | |
2537 } | |
2538 | |
2539 | |
2540 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) { | |
2541 assert(x->number_of_arguments() == 1, "wrong type"); | |
2542 LIRItem value (x->argument_at(0), this); | |
2543 LIR_Opr reg = rlock_result(x); | |
2544 value.load_item(); | |
2545 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type())); | |
2546 __ move(tmp, reg); | |
2547 } | |
2548 | |
2549 | |
2550 | |
2551 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval() | |
2552 void LIRGenerator::do_IfOp(IfOp* x) { | |
2553 #ifdef ASSERT | |
2554 { | |
2555 ValueTag xtag = x->x()->type()->tag(); | |
2556 ValueTag ttag = x->tval()->type()->tag(); | |
2557 assert(xtag == intTag || xtag == objectTag, "cannot handle others"); | |
2558 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others"); | |
2559 assert(ttag == x->fval()->type()->tag(), "cannot handle others"); | |
2560 } | |
2561 #endif | |
2562 | |
2563 LIRItem left(x->x(), this); | |
2564 LIRItem right(x->y(), this); | |
2565 left.load_item(); | |
2566 if (can_inline_as_constant(right.value())) { | |
2567 right.dont_load_item(); | |
2568 } else { | |
2569 right.load_item(); | |
2570 } | |
2571 | |
2572 LIRItem t_val(x->tval(), this); | |
2573 LIRItem f_val(x->fval(), this); | |
2574 t_val.dont_load_item(); | |
2575 f_val.dont_load_item(); | |
2576 LIR_Opr reg = rlock_result(x); | |
2577 | |
2578 __ cmp(lir_cond(x->cond()), left.result(), right.result()); | |
2579 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg); | |
2580 } | |
2581 | |
2582 | |
2583 void LIRGenerator::do_Intrinsic(Intrinsic* x) { | |
2584 switch (x->id()) { | |
2585 case vmIntrinsics::_intBitsToFloat : | |
2586 case vmIntrinsics::_doubleToRawLongBits : | |
2587 case vmIntrinsics::_longBitsToDouble : | |
2588 case vmIntrinsics::_floatToRawIntBits : { | |
2589 do_FPIntrinsics(x); | |
2590 break; | |
2591 } | |
2592 | |
2593 case vmIntrinsics::_currentTimeMillis: { | |
2594 assert(x->number_of_arguments() == 0, "wrong type"); | |
2595 LIR_Opr reg = result_register_for(x->type()); | |
2596 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, os::javaTimeMillis), getThreadTemp(), | |
2597 reg, new LIR_OprList()); | |
2598 LIR_Opr result = rlock_result(x); | |
2599 __ move(reg, result); | |
2600 break; | |
2601 } | |
2602 | |
2603 case vmIntrinsics::_nanoTime: { | |
2604 assert(x->number_of_arguments() == 0, "wrong type"); | |
2605 LIR_Opr reg = result_register_for(x->type()); | |
2606 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, os::javaTimeNanos), getThreadTemp(), | |
2607 reg, new LIR_OprList()); | |
2608 LIR_Opr result = rlock_result(x); | |
2609 __ move(reg, result); | |
2610 break; | |
2611 } | |
2612 | |
2613 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break; | |
2614 case vmIntrinsics::_getClass: do_getClass(x); break; | |
2615 case vmIntrinsics::_currentThread: do_currentThread(x); break; | |
2616 | |
2617 case vmIntrinsics::_dlog: // fall through | |
2618 case vmIntrinsics::_dlog10: // fall through | |
2619 case vmIntrinsics::_dabs: // fall through | |
2620 case vmIntrinsics::_dsqrt: // fall through | |
2621 case vmIntrinsics::_dtan: // fall through | |
2622 case vmIntrinsics::_dsin : // fall through | |
2623 case vmIntrinsics::_dcos : do_MathIntrinsic(x); break; | |
2624 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break; | |
2625 | |
2626 // java.nio.Buffer.checkIndex | |
2627 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break; | |
2628 | |
2629 case vmIntrinsics::_compareAndSwapObject: | |
2630 do_CompareAndSwap(x, objectType); | |
2631 break; | |
2632 case vmIntrinsics::_compareAndSwapInt: | |
2633 do_CompareAndSwap(x, intType); | |
2634 break; | |
2635 case vmIntrinsics::_compareAndSwapLong: | |
2636 do_CompareAndSwap(x, longType); | |
2637 break; | |
2638 | |
2639 // sun.misc.AtomicLongCSImpl.attemptUpdate | |
2640 case vmIntrinsics::_attemptUpdate: | |
2641 do_AttemptUpdate(x); | |
2642 break; | |
2643 | |
2644 default: ShouldNotReachHere(); break; | |
2645 } | |
2646 } | |
2647 | |
2648 void LIRGenerator::do_ProfileCall(ProfileCall* x) { | |
2649 // Need recv in a temporary register so it interferes with the other temporaries | |
2650 LIR_Opr recv = LIR_OprFact::illegalOpr; | |
2651 LIR_Opr mdo = new_register(T_OBJECT); | |
1783 | 2652 // tmp is used to hold the counters on SPARC |
2653 LIR_Opr tmp = new_pointer_register(); | |
0 | 2654 if (x->recv() != NULL) { |
2655 LIRItem value(x->recv(), this); | |
2656 value.load_item(); | |
2657 recv = new_register(T_OBJECT); | |
2658 __ move(value.result(), recv); | |
2659 } | |
2660 __ profile_call(x->method(), x->bci_of_invoke(), mdo, recv, tmp, x->known_holder()); | |
2661 } | |
2662 | |
1783 | 2663 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) { |
2664 // We can safely ignore accessors here, since c2 will inline them anyway, | |
2665 // accessors are also always mature. | |
2666 if (!x->inlinee()->is_accessor()) { | |
2667 CodeEmitInfo* info = state_for(x, x->state(), true); | |
2668 // Increment invocation counter, don't notify the runtime, because we don't inline loops, | |
2669 increment_event_counter_impl(info, x->inlinee(), 0, InvocationEntryBci, false, false); | |
2670 } | |
2671 } | |
2672 | |
2673 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) { | |
2674 int freq_log; | |
2675 int level = compilation()->env()->comp_level(); | |
2676 if (level == CompLevel_limited_profile) { | |
2677 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog); | |
2678 } else if (level == CompLevel_full_profile) { | |
2679 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog); | |
2680 } else { | |
2681 ShouldNotReachHere(); | |
2682 } | |
2683 // Increment the appropriate invocation/backedge counter and notify the runtime. | |
2684 increment_event_counter_impl(info, info->scope()->method(), (1 << freq_log) - 1, bci, backedge, true); | |
0 | 2685 } |
2686 | |
1783 | 2687 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info, |
2688 ciMethod *method, int frequency, | |
2689 int bci, bool backedge, bool notify) { | |
2690 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0"); | |
2691 int level = _compilation->env()->comp_level(); | |
2692 assert(level > CompLevel_simple, "Shouldn't be here"); | |
2693 | |
2694 int offset = -1; | |
2695 LIR_Opr counter_holder = new_register(T_OBJECT); | |
2696 LIR_Opr meth; | |
2697 if (level == CompLevel_limited_profile) { | |
2698 offset = in_bytes(backedge ? methodOopDesc::backedge_counter_offset() : | |
2699 methodOopDesc::invocation_counter_offset()); | |
2700 __ oop2reg(method->constant_encoding(), counter_holder); | |
2701 meth = counter_holder; | |
2702 } else if (level == CompLevel_full_profile) { | |
2703 offset = in_bytes(backedge ? methodDataOopDesc::backedge_counter_offset() : | |
2704 methodDataOopDesc::invocation_counter_offset()); | |
2705 __ oop2reg(method->method_data()->constant_encoding(), counter_holder); | |
2706 meth = new_register(T_OBJECT); | |
2707 __ oop2reg(method->constant_encoding(), meth); | |
2708 } else { | |
2709 ShouldNotReachHere(); | |
2710 } | |
2711 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT); | |
2712 LIR_Opr result = new_register(T_INT); | |
2713 __ load(counter, result); | |
2714 __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result); | |
2715 __ store(result, counter); | |
2716 if (notify) { | |
2717 LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT); | |
2718 __ logical_and(result, mask, result); | |
2719 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0)); | |
2720 // The bci for info can point to cmp for if's we want the if bci | |
2721 CodeStub* overflow = new CounterOverflowStub(info, bci, meth); | |
2722 __ branch(lir_cond_equal, T_INT, overflow); | |
2723 __ branch_destination(overflow->continuation()); | |
2724 } | |
2725 } | |
0 | 2726 |
2727 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) { | |
2728 LIRItemList args(1); | |
2729 LIRItem value(arg1, this); | |
2730 args.append(&value); | |
2731 BasicTypeList signature; | |
2732 signature.append(as_BasicType(arg1->type())); | |
2733 | |
2734 return call_runtime(&signature, &args, entry, result_type, info); | |
2735 } | |
2736 | |
2737 | |
2738 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) { | |
2739 LIRItemList args(2); | |
2740 LIRItem value1(arg1, this); | |
2741 LIRItem value2(arg2, this); | |
2742 args.append(&value1); | |
2743 args.append(&value2); | |
2744 BasicTypeList signature; | |
2745 signature.append(as_BasicType(arg1->type())); | |
2746 signature.append(as_BasicType(arg2->type())); | |
2747 | |
2748 return call_runtime(&signature, &args, entry, result_type, info); | |
2749 } | |
2750 | |
2751 | |
2752 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args, | |
2753 address entry, ValueType* result_type, CodeEmitInfo* info) { | |
2754 // get a result register | |
2755 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; | |
2756 LIR_Opr result = LIR_OprFact::illegalOpr; | |
2757 if (result_type->tag() != voidTag) { | |
2758 result = new_register(result_type); | |
2759 phys_reg = result_register_for(result_type); | |
2760 } | |
2761 | |
2762 // move the arguments into the correct location | |
2763 CallingConvention* cc = frame_map()->c_calling_convention(signature); | |
2764 assert(cc->length() == args->length(), "argument mismatch"); | |
2765 for (int i = 0; i < args->length(); i++) { | |
2766 LIR_Opr arg = args->at(i); | |
2767 LIR_Opr loc = cc->at(i); | |
2768 if (loc->is_register()) { | |
2769 __ move(arg, loc); | |
2770 } else { | |
2771 LIR_Address* addr = loc->as_address_ptr(); | |
2772 // if (!can_store_as_constant(arg)) { | |
2773 // LIR_Opr tmp = new_register(arg->type()); | |
2774 // __ move(arg, tmp); | |
2775 // arg = tmp; | |
2776 // } | |
2777 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
2778 __ unaligned_move(arg, addr); | |
2779 } else { | |
2780 __ move(arg, addr); | |
2781 } | |
2782 } | |
2783 } | |
2784 | |
2785 if (info) { | |
2786 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); | |
2787 } else { | |
2788 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); | |
2789 } | |
2790 if (result->is_valid()) { | |
2791 __ move(phys_reg, result); | |
2792 } | |
2793 return result; | |
2794 } | |
2795 | |
2796 | |
2797 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args, | |
2798 address entry, ValueType* result_type, CodeEmitInfo* info) { | |
2799 // get a result register | |
2800 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; | |
2801 LIR_Opr result = LIR_OprFact::illegalOpr; | |
2802 if (result_type->tag() != voidTag) { | |
2803 result = new_register(result_type); | |
2804 phys_reg = result_register_for(result_type); | |
2805 } | |
2806 | |
2807 // move the arguments into the correct location | |
2808 CallingConvention* cc = frame_map()->c_calling_convention(signature); | |
2809 | |
2810 assert(cc->length() == args->length(), "argument mismatch"); | |
2811 for (int i = 0; i < args->length(); i++) { | |
2812 LIRItem* arg = args->at(i); | |
2813 LIR_Opr loc = cc->at(i); | |
2814 if (loc->is_register()) { | |
2815 arg->load_item_force(loc); | |
2816 } else { | |
2817 LIR_Address* addr = loc->as_address_ptr(); | |
2818 arg->load_for_store(addr->type()); | |
2819 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
2820 __ unaligned_move(arg->result(), addr); | |
2821 } else { | |
2822 __ move(arg->result(), addr); | |
2823 } | |
2824 } | |
2825 } | |
2826 | |
2827 if (info) { | |
2828 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); | |
2829 } else { | |
2830 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); | |
2831 } | |
2832 if (result->is_valid()) { | |
2833 __ move(phys_reg, result); | |
2834 } | |
2835 return result; | |
2836 } |