Mercurial > hg > truffle
annotate src/share/vm/c1/c1_LIRGenerator.cpp @ 8883:b9a918201d47
Merge with hsx25
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Sat, 06 Apr 2013 20:04:06 +0200 |
parents | 5fc51c1ecdeb d595e8ddadd9 |
children | 89e4d67fdd2a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2012, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "c1/c1_Compilation.hpp" | |
27 #include "c1/c1_FrameMap.hpp" | |
28 #include "c1/c1_Instruction.hpp" | |
29 #include "c1/c1_LIRAssembler.hpp" | |
30 #include "c1/c1_LIRGenerator.hpp" | |
31 #include "c1/c1_ValueStack.hpp" | |
32 #include "ci/ciArrayKlass.hpp" | |
33 #include "ci/ciInstance.hpp" | |
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34 #include "ci/ciObjArray.hpp" |
1972 | 35 #include "runtime/sharedRuntime.hpp" |
36 #include "runtime/stubRoutines.hpp" | |
37 #include "utilities/bitMap.inline.hpp" | |
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38 #include "utilities/macros.hpp" |
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39 #if INCLUDE_ALL_GCS |
1972 | 40 #include "gc_implementation/g1/heapRegion.hpp" |
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41 #endif // INCLUDE_ALL_GCS |
0 | 42 |
43 #ifdef ASSERT | |
44 #define __ gen()->lir(__FILE__, __LINE__)-> | |
45 #else | |
46 #define __ gen()->lir()-> | |
47 #endif | |
48 | |
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49 // TODO: ARM - Use some recognizable constant which still fits architectural constraints |
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50 #ifdef ARM |
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51 #define PATCHED_ADDR (204) |
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52 #else |
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53 #define PATCHED_ADDR (max_jint) |
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54 #endif |
0 | 55 |
56 void PhiResolverState::reset(int max_vregs) { | |
57 // Initialize array sizes | |
58 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL); | |
59 _virtual_operands.trunc_to(0); | |
60 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL); | |
61 _other_operands.trunc_to(0); | |
62 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL); | |
63 _vreg_table.trunc_to(0); | |
64 } | |
65 | |
66 | |
67 | |
68 //-------------------------------------------------------------- | |
69 // PhiResolver | |
70 | |
71 // Resolves cycles: | |
72 // | |
73 // r1 := r2 becomes temp := r1 | |
74 // r2 := r1 r1 := r2 | |
75 // r2 := temp | |
76 // and orders moves: | |
77 // | |
78 // r2 := r3 becomes r1 := r2 | |
79 // r1 := r2 r2 := r3 | |
80 | |
81 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs) | |
82 : _gen(gen) | |
83 , _state(gen->resolver_state()) | |
84 , _temp(LIR_OprFact::illegalOpr) | |
85 { | |
86 // reinitialize the shared state arrays | |
87 _state.reset(max_vregs); | |
88 } | |
89 | |
90 | |
91 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) { | |
92 assert(src->is_valid(), ""); | |
93 assert(dest->is_valid(), ""); | |
94 __ move(src, dest); | |
95 } | |
96 | |
97 | |
98 void PhiResolver::move_temp_to(LIR_Opr dest) { | |
99 assert(_temp->is_valid(), ""); | |
100 emit_move(_temp, dest); | |
101 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr); | |
102 } | |
103 | |
104 | |
105 void PhiResolver::move_to_temp(LIR_Opr src) { | |
106 assert(_temp->is_illegal(), ""); | |
107 _temp = _gen->new_register(src->type()); | |
108 emit_move(src, _temp); | |
109 } | |
110 | |
111 | |
112 // Traverse assignment graph in depth first order and generate moves in post order | |
113 // ie. two assignments: b := c, a := b start with node c: | |
114 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a) | |
115 // Generates moves in this order: move b to a and move c to b | |
116 // ie. cycle a := b, b := a start with node a | |
117 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a) | |
118 // Generates moves in this order: move b to temp, move a to b, move temp to a | |
119 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) { | |
120 if (!dest->visited()) { | |
121 dest->set_visited(); | |
122 for (int i = dest->no_of_destinations()-1; i >= 0; i --) { | |
123 move(dest, dest->destination_at(i)); | |
124 } | |
125 } else if (!dest->start_node()) { | |
126 // cylce in graph detected | |
127 assert(_loop == NULL, "only one loop valid!"); | |
128 _loop = dest; | |
129 move_to_temp(src->operand()); | |
130 return; | |
131 } // else dest is a start node | |
132 | |
133 if (!dest->assigned()) { | |
134 if (_loop == dest) { | |
135 move_temp_to(dest->operand()); | |
136 dest->set_assigned(); | |
137 } else if (src != NULL) { | |
138 emit_move(src->operand(), dest->operand()); | |
139 dest->set_assigned(); | |
140 } | |
141 } | |
142 } | |
143 | |
144 | |
145 PhiResolver::~PhiResolver() { | |
146 int i; | |
147 // resolve any cycles in moves from and to virtual registers | |
148 for (i = virtual_operands().length() - 1; i >= 0; i --) { | |
149 ResolveNode* node = virtual_operands()[i]; | |
150 if (!node->visited()) { | |
151 _loop = NULL; | |
152 move(NULL, node); | |
153 node->set_start_node(); | |
154 assert(_temp->is_illegal(), "move_temp_to() call missing"); | |
155 } | |
156 } | |
157 | |
158 // generate move for move from non virtual register to abitrary destination | |
159 for (i = other_operands().length() - 1; i >= 0; i --) { | |
160 ResolveNode* node = other_operands()[i]; | |
161 for (int j = node->no_of_destinations() - 1; j >= 0; j --) { | |
162 emit_move(node->operand(), node->destination_at(j)->operand()); | |
163 } | |
164 } | |
165 } | |
166 | |
167 | |
168 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) { | |
169 ResolveNode* node; | |
170 if (opr->is_virtual()) { | |
171 int vreg_num = opr->vreg_number(); | |
172 node = vreg_table().at_grow(vreg_num, NULL); | |
173 assert(node == NULL || node->operand() == opr, ""); | |
174 if (node == NULL) { | |
175 node = new ResolveNode(opr); | |
176 vreg_table()[vreg_num] = node; | |
177 } | |
178 // Make sure that all virtual operands show up in the list when | |
179 // they are used as the source of a move. | |
180 if (source && !virtual_operands().contains(node)) { | |
181 virtual_operands().append(node); | |
182 } | |
183 } else { | |
184 assert(source, ""); | |
185 node = new ResolveNode(opr); | |
186 other_operands().append(node); | |
187 } | |
188 return node; | |
189 } | |
190 | |
191 | |
192 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) { | |
193 assert(dest->is_virtual(), ""); | |
194 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr(); | |
195 assert(src->is_valid(), ""); | |
196 assert(dest->is_valid(), ""); | |
197 ResolveNode* source = source_node(src); | |
198 source->append(destination_node(dest)); | |
199 } | |
200 | |
201 | |
202 //-------------------------------------------------------------- | |
203 // LIRItem | |
204 | |
205 void LIRItem::set_result(LIR_Opr opr) { | |
206 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change"); | |
207 value()->set_operand(opr); | |
208 | |
209 if (opr->is_virtual()) { | |
210 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL); | |
211 } | |
212 | |
213 _result = opr; | |
214 } | |
215 | |
216 void LIRItem::load_item() { | |
217 if (result()->is_illegal()) { | |
218 // update the items result | |
219 _result = value()->operand(); | |
220 } | |
221 if (!result()->is_register()) { | |
222 LIR_Opr reg = _gen->new_register(value()->type()); | |
223 __ move(result(), reg); | |
224 if (result()->is_constant()) { | |
225 _result = reg; | |
226 } else { | |
227 set_result(reg); | |
228 } | |
229 } | |
230 } | |
231 | |
232 | |
233 void LIRItem::load_for_store(BasicType type) { | |
234 if (_gen->can_store_as_constant(value(), type)) { | |
235 _result = value()->operand(); | |
236 if (!_result->is_constant()) { | |
237 _result = LIR_OprFact::value_type(value()->type()); | |
238 } | |
239 } else if (type == T_BYTE || type == T_BOOLEAN) { | |
240 load_byte_item(); | |
241 } else { | |
242 load_item(); | |
243 } | |
244 } | |
245 | |
246 void LIRItem::load_item_force(LIR_Opr reg) { | |
247 LIR_Opr r = result(); | |
248 if (r != reg) { | |
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249 #if !defined(ARM) && !defined(E500V2) |
0 | 250 if (r->type() != reg->type()) { |
251 // moves between different types need an intervening spill slot | |
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252 r = _gen->force_to_spill(r, reg->type()); |
0 | 253 } |
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254 #endif |
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255 __ move(r, reg); |
0 | 256 _result = reg; |
257 } | |
258 } | |
259 | |
260 ciObject* LIRItem::get_jobject_constant() const { | |
261 ObjectType* oc = type()->as_ObjectType(); | |
262 if (oc) { | |
263 return oc->constant_value(); | |
264 } | |
265 return NULL; | |
266 } | |
267 | |
268 | |
269 jint LIRItem::get_jint_constant() const { | |
270 assert(is_constant() && value() != NULL, ""); | |
271 assert(type()->as_IntConstant() != NULL, "type check"); | |
272 return type()->as_IntConstant()->value(); | |
273 } | |
274 | |
275 | |
276 jint LIRItem::get_address_constant() const { | |
277 assert(is_constant() && value() != NULL, ""); | |
278 assert(type()->as_AddressConstant() != NULL, "type check"); | |
279 return type()->as_AddressConstant()->value(); | |
280 } | |
281 | |
282 | |
283 jfloat LIRItem::get_jfloat_constant() const { | |
284 assert(is_constant() && value() != NULL, ""); | |
285 assert(type()->as_FloatConstant() != NULL, "type check"); | |
286 return type()->as_FloatConstant()->value(); | |
287 } | |
288 | |
289 | |
290 jdouble LIRItem::get_jdouble_constant() const { | |
291 assert(is_constant() && value() != NULL, ""); | |
292 assert(type()->as_DoubleConstant() != NULL, "type check"); | |
293 return type()->as_DoubleConstant()->value(); | |
294 } | |
295 | |
296 | |
297 jlong LIRItem::get_jlong_constant() const { | |
298 assert(is_constant() && value() != NULL, ""); | |
299 assert(type()->as_LongConstant() != NULL, "type check"); | |
300 return type()->as_LongConstant()->value(); | |
301 } | |
302 | |
303 | |
304 | |
305 //-------------------------------------------------------------- | |
306 | |
307 | |
308 void LIRGenerator::init() { | |
342 | 309 _bs = Universe::heap()->barrier_set(); |
0 | 310 } |
311 | |
312 | |
313 void LIRGenerator::block_do_prolog(BlockBegin* block) { | |
314 #ifndef PRODUCT | |
315 if (PrintIRWithLIR) { | |
316 block->print(); | |
317 } | |
318 #endif | |
319 | |
320 // set up the list of LIR instructions | |
321 assert(block->lir() == NULL, "LIR list already computed for this block"); | |
322 _lir = new LIR_List(compilation(), block); | |
323 block->set_lir(_lir); | |
324 | |
325 __ branch_destination(block->label()); | |
326 | |
327 if (LIRTraceExecution && | |
1584 | 328 Compilation::current()->hir()->start()->block_id() != block->block_id() && |
0 | 329 !block->is_set(BlockBegin::exception_entry_flag)) { |
330 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst"); | |
331 trace_block_entry(block); | |
332 } | |
333 } | |
334 | |
335 | |
336 void LIRGenerator::block_do_epilog(BlockBegin* block) { | |
337 #ifndef PRODUCT | |
338 if (PrintIRWithLIR) { | |
339 tty->cr(); | |
340 } | |
341 #endif | |
342 | |
343 // LIR_Opr for unpinned constants shouldn't be referenced by other | |
344 // blocks so clear them out after processing the block. | |
345 for (int i = 0; i < _unpinned_constants.length(); i++) { | |
346 _unpinned_constants.at(i)->clear_operand(); | |
347 } | |
348 _unpinned_constants.trunc_to(0); | |
349 | |
350 // clear our any registers for other local constants | |
351 _constants.trunc_to(0); | |
352 _reg_for_constants.trunc_to(0); | |
353 } | |
354 | |
355 | |
356 void LIRGenerator::block_do(BlockBegin* block) { | |
357 CHECK_BAILOUT(); | |
358 | |
359 block_do_prolog(block); | |
360 set_block(block); | |
361 | |
362 for (Instruction* instr = block; instr != NULL; instr = instr->next()) { | |
363 if (instr->is_pinned()) do_root(instr); | |
364 } | |
365 | |
366 set_block(NULL); | |
367 block_do_epilog(block); | |
368 } | |
369 | |
370 | |
371 //-------------------------LIRGenerator----------------------------- | |
372 | |
373 // This is where the tree-walk starts; instr must be root; | |
374 void LIRGenerator::do_root(Value instr) { | |
375 CHECK_BAILOUT(); | |
376 | |
377 InstructionMark im(compilation(), instr); | |
378 | |
379 assert(instr->is_pinned(), "use only with roots"); | |
380 assert(instr->subst() == instr, "shouldn't have missed substitution"); | |
381 | |
382 instr->visit(this); | |
383 | |
384 assert(!instr->has_uses() || instr->operand()->is_valid() || | |
385 instr->as_Constant() != NULL || bailed_out(), "invalid item set"); | |
386 } | |
387 | |
388 | |
389 // This is called for each node in tree; the walk stops if a root is reached | |
390 void LIRGenerator::walk(Value instr) { | |
391 InstructionMark im(compilation(), instr); | |
392 //stop walk when encounter a root | |
393 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) { | |
394 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited"); | |
395 } else { | |
396 assert(instr->subst() == instr, "shouldn't have missed substitution"); | |
397 instr->visit(this); | |
398 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use"); | |
399 } | |
400 } | |
401 | |
402 | |
403 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) { | |
1819 | 404 assert(state != NULL, "state must be defined"); |
405 | |
8860 | 406 #ifndef PRODUCT |
407 state->verify(); | |
408 #endif | |
409 | |
1819 | 410 ValueStack* s = state; |
411 for_each_state(s) { | |
412 if (s->kind() == ValueStack::EmptyExceptionState) { | |
413 assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty"); | |
414 continue; | |
0 | 415 } |
1819 | 416 |
417 int index; | |
418 Value value; | |
419 for_each_stack_value(s, index, value) { | |
420 assert(value->subst() == value, "missed substitution"); | |
421 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { | |
422 walk(value); | |
423 assert(value->operand()->is_valid(), "must be evaluated now"); | |
424 } | |
425 } | |
426 | |
427 int bci = s->bci(); | |
0 | 428 IRScope* scope = s->scope(); |
429 ciMethod* method = scope->method(); | |
430 | |
431 MethodLivenessResult liveness = method->liveness_at_bci(bci); | |
432 if (bci == SynchronizationEntryBCI) { | |
433 if (x->as_ExceptionObject() || x->as_Throw()) { | |
434 // all locals are dead on exit from the synthetic unlocker | |
435 liveness.clear(); | |
436 } else { | |
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437 assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke"); |
0 | 438 } |
439 } | |
440 if (!liveness.is_valid()) { | |
441 // Degenerate or breakpointed method. | |
442 bailout("Degenerate or breakpointed method"); | |
443 } else { | |
444 assert((int)liveness.size() == s->locals_size(), "error in use of liveness"); | |
445 for_each_local_value(s, index, value) { | |
446 assert(value->subst() == value, "missed substition"); | |
447 if (liveness.at(index) && !value->type()->is_illegal()) { | |
448 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { | |
449 walk(value); | |
450 assert(value->operand()->is_valid(), "must be evaluated now"); | |
451 } | |
452 } else { | |
453 // NULL out this local so that linear scan can assume that all non-NULL values are live. | |
454 s->invalidate_local(index); | |
455 } | |
456 } | |
457 } | |
458 } | |
459 | |
8860 | 460 return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException)); |
0 | 461 } |
462 | |
463 | |
464 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) { | |
1819 | 465 return state_for(x, x->exception_state()); |
0 | 466 } |
467 | |
468 | |
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469 void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info) { |
0 | 470 if (!obj->is_loaded() || PatchALot) { |
471 assert(info != NULL, "info must be set if class is not loaded"); | |
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472 __ klass2reg_patch(NULL, r, info); |
0 | 473 } else { |
474 // no patching needed | |
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475 __ metadata2reg(obj->constant_encoding(), r); |
0 | 476 } |
477 } | |
478 | |
479 | |
480 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index, | |
481 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) { | |
482 CodeStub* stub = new RangeCheckStub(range_check_info, index); | |
483 if (index->is_constant()) { | |
484 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(), | |
485 index->as_jint(), null_check_info); | |
486 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch | |
487 } else { | |
488 cmp_reg_mem(lir_cond_aboveEqual, index, array, | |
489 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info); | |
490 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch | |
491 } | |
492 } | |
493 | |
494 | |
495 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { | |
496 CodeStub* stub = new RangeCheckStub(info, index, true); | |
497 if (index->is_constant()) { | |
498 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info); | |
499 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch | |
500 } else { | |
501 cmp_reg_mem(lir_cond_aboveEqual, index, buffer, | |
502 java_nio_Buffer::limit_offset(), T_INT, info); | |
503 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch | |
504 } | |
505 __ move(index, result); | |
506 } | |
507 | |
508 | |
509 | |
510 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) { | |
511 LIR_Opr result_op = result; | |
512 LIR_Opr left_op = left; | |
513 LIR_Opr right_op = right; | |
514 | |
515 if (TwoOperandLIRForm && left_op != result_op) { | |
516 assert(right_op != result_op, "malformed"); | |
517 __ move(left_op, result_op); | |
518 left_op = result_op; | |
519 } | |
520 | |
521 switch(code) { | |
522 case Bytecodes::_dadd: | |
523 case Bytecodes::_fadd: | |
524 case Bytecodes::_ladd: | |
525 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break; | |
526 case Bytecodes::_fmul: | |
527 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break; | |
528 | |
529 case Bytecodes::_dmul: | |
530 { | |
531 if (is_strictfp) { | |
532 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break; | |
533 } else { | |
534 __ mul(left_op, right_op, result_op); break; | |
535 } | |
536 } | |
537 break; | |
538 | |
539 case Bytecodes::_imul: | |
540 { | |
541 bool did_strength_reduce = false; | |
542 | |
543 if (right->is_constant()) { | |
544 int c = right->as_jint(); | |
545 if (is_power_of_2(c)) { | |
546 // do not need tmp here | |
547 __ shift_left(left_op, exact_log2(c), result_op); | |
548 did_strength_reduce = true; | |
549 } else { | |
550 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op); | |
551 } | |
552 } | |
553 // we couldn't strength reduce so just emit the multiply | |
554 if (!did_strength_reduce) { | |
555 __ mul(left_op, right_op, result_op); | |
556 } | |
557 } | |
558 break; | |
559 | |
560 case Bytecodes::_dsub: | |
561 case Bytecodes::_fsub: | |
562 case Bytecodes::_lsub: | |
563 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break; | |
564 | |
565 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break; | |
566 // ldiv and lrem are implemented with a direct runtime call | |
567 | |
568 case Bytecodes::_ddiv: | |
569 { | |
570 if (is_strictfp) { | |
571 __ div_strictfp (left_op, right_op, result_op, tmp_op); break; | |
572 } else { | |
573 __ div (left_op, right_op, result_op); break; | |
574 } | |
575 } | |
576 break; | |
577 | |
578 case Bytecodes::_drem: | |
579 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break; | |
580 | |
581 default: ShouldNotReachHere(); | |
582 } | |
583 } | |
584 | |
585 | |
586 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) { | |
587 arithmetic_op(code, result, left, right, false, tmp); | |
588 } | |
589 | |
590 | |
591 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { | |
592 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info); | |
593 } | |
594 | |
595 | |
596 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) { | |
597 arithmetic_op(code, result, left, right, is_strictfp, tmp); | |
598 } | |
599 | |
600 | |
601 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) { | |
602 if (TwoOperandLIRForm && value != result_op) { | |
603 assert(count != result_op, "malformed"); | |
604 __ move(value, result_op); | |
605 value = result_op; | |
606 } | |
607 | |
608 assert(count->is_constant() || count->is_register(), "must be"); | |
609 switch(code) { | |
610 case Bytecodes::_ishl: | |
611 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break; | |
612 case Bytecodes::_ishr: | |
613 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break; | |
614 case Bytecodes::_iushr: | |
615 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break; | |
616 default: ShouldNotReachHere(); | |
617 } | |
618 } | |
619 | |
620 | |
621 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) { | |
622 if (TwoOperandLIRForm && left_op != result_op) { | |
623 assert(right_op != result_op, "malformed"); | |
624 __ move(left_op, result_op); | |
625 left_op = result_op; | |
626 } | |
627 | |
628 switch(code) { | |
629 case Bytecodes::_iand: | |
630 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break; | |
631 | |
632 case Bytecodes::_ior: | |
633 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break; | |
634 | |
635 case Bytecodes::_ixor: | |
636 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break; | |
637 | |
638 default: ShouldNotReachHere(); | |
639 } | |
640 } | |
641 | |
642 | |
643 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) { | |
644 if (!GenerateSynchronizationCode) return; | |
645 // for slow path, use debug info for state after successful locking | |
646 CodeStub* slow_path = new MonitorEnterStub(object, lock, info); | |
647 __ load_stack_address_monitor(monitor_no, lock); | |
648 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter | |
649 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception); | |
650 } | |
651 | |
652 | |
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653 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) { |
0 | 654 if (!GenerateSynchronizationCode) return; |
655 // setup registers | |
656 LIR_Opr hdr = lock; | |
657 lock = new_hdr; | |
658 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no); | |
659 __ load_stack_address_monitor(monitor_no, lock); | |
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660 __ unlock_object(hdr, object, lock, scratch, slow_path); |
0 | 661 } |
662 | |
663 | |
664 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) { | |
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665 klass2reg_with_patching(klass_reg, klass, info); |
0 | 666 // If klass is not loaded we do not know if the klass has finalizers: |
667 if (UseFastNewInstance && klass->is_loaded() | |
668 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) { | |
669 | |
670 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id; | |
671 | |
672 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id); | |
673 | |
674 assert(klass->is_loaded(), "must be loaded"); | |
675 // allocate space for instance | |
676 assert(klass->size_helper() >= 0, "illegal instance size"); | |
677 const int instance_size = align_object_size(klass->size_helper()); | |
678 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4, | |
679 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path); | |
680 } else { | |
681 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id); | |
682 __ branch(lir_cond_always, T_ILLEGAL, slow_path); | |
683 __ branch_destination(slow_path->continuation()); | |
684 } | |
685 } | |
686 | |
687 | |
688 static bool is_constant_zero(Instruction* inst) { | |
689 IntConstant* c = inst->type()->as_IntConstant(); | |
690 if (c) { | |
691 return (c->value() == 0); | |
692 } | |
693 return false; | |
694 } | |
695 | |
696 | |
697 static bool positive_constant(Instruction* inst) { | |
698 IntConstant* c = inst->type()->as_IntConstant(); | |
699 if (c) { | |
700 return (c->value() >= 0); | |
701 } | |
702 return false; | |
703 } | |
704 | |
705 | |
706 static ciArrayKlass* as_array_klass(ciType* type) { | |
707 if (type != NULL && type->is_array_klass() && type->is_loaded()) { | |
708 return (ciArrayKlass*)type; | |
709 } else { | |
710 return NULL; | |
711 } | |
712 } | |
713 | |
2446 | 714 static Value maxvalue(IfOp* ifop) { |
715 switch (ifop->cond()) { | |
716 case If::eql: return NULL; | |
717 case If::neq: return NULL; | |
718 case If::lss: // x < y ? x : y | |
719 case If::leq: // x <= y ? x : y | |
720 if (ifop->x() == ifop->tval() && | |
721 ifop->y() == ifop->fval()) return ifop->y(); | |
722 return NULL; | |
723 | |
724 case If::gtr: // x > y ? y : x | |
725 case If::geq: // x >= y ? y : x | |
726 if (ifop->x() == ifop->tval() && | |
727 ifop->y() == ifop->fval()) return ifop->y(); | |
728 return NULL; | |
729 | |
730 } | |
731 } | |
732 | |
733 static ciType* phi_declared_type(Phi* phi) { | |
734 ciType* t = phi->operand_at(0)->declared_type(); | |
735 if (t == NULL) { | |
736 return NULL; | |
737 } | |
738 for(int i = 1; i < phi->operand_count(); i++) { | |
739 if (t != phi->operand_at(i)->declared_type()) { | |
740 return NULL; | |
741 } | |
742 } | |
743 return t; | |
744 } | |
745 | |
0 | 746 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) { |
747 Instruction* src = x->argument_at(0); | |
748 Instruction* src_pos = x->argument_at(1); | |
749 Instruction* dst = x->argument_at(2); | |
750 Instruction* dst_pos = x->argument_at(3); | |
751 Instruction* length = x->argument_at(4); | |
752 | |
753 // first try to identify the likely type of the arrays involved | |
754 ciArrayKlass* expected_type = NULL; | |
2446 | 755 bool is_exact = false, src_objarray = false, dst_objarray = false; |
0 | 756 { |
757 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type()); | |
758 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type()); | |
2446 | 759 Phi* phi; |
760 if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) { | |
761 src_declared_type = as_array_klass(phi_declared_type(phi)); | |
762 } | |
0 | 763 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type()); |
764 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type()); | |
2446 | 765 if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) { |
766 dst_declared_type = as_array_klass(phi_declared_type(phi)); | |
767 } | |
768 | |
0 | 769 if (src_exact_type != NULL && src_exact_type == dst_exact_type) { |
770 // the types exactly match so the type is fully known | |
771 is_exact = true; | |
772 expected_type = src_exact_type; | |
773 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) { | |
774 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type; | |
775 ciArrayKlass* src_type = NULL; | |
776 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) { | |
777 src_type = (ciArrayKlass*) src_exact_type; | |
778 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) { | |
779 src_type = (ciArrayKlass*) src_declared_type; | |
780 } | |
781 if (src_type != NULL) { | |
782 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) { | |
783 is_exact = true; | |
784 expected_type = dst_type; | |
785 } | |
786 } | |
787 } | |
788 // at least pass along a good guess | |
789 if (expected_type == NULL) expected_type = dst_exact_type; | |
790 if (expected_type == NULL) expected_type = src_declared_type; | |
791 if (expected_type == NULL) expected_type = dst_declared_type; | |
2446 | 792 |
793 src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass()); | |
794 dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass()); | |
0 | 795 } |
796 | |
797 // if a probable array type has been identified, figure out if any | |
798 // of the required checks for a fast case can be elided. | |
799 int flags = LIR_OpArrayCopy::all_flags; | |
2446 | 800 |
801 if (!src_objarray) | |
802 flags &= ~LIR_OpArrayCopy::src_objarray; | |
803 if (!dst_objarray) | |
804 flags &= ~LIR_OpArrayCopy::dst_objarray; | |
805 | |
806 if (!x->arg_needs_null_check(0)) | |
807 flags &= ~LIR_OpArrayCopy::src_null_check; | |
808 if (!x->arg_needs_null_check(2)) | |
809 flags &= ~LIR_OpArrayCopy::dst_null_check; | |
810 | |
811 | |
0 | 812 if (expected_type != NULL) { |
2446 | 813 Value length_limit = NULL; |
814 | |
815 IfOp* ifop = length->as_IfOp(); | |
816 if (ifop != NULL) { | |
817 // look for expressions like min(v, a.length) which ends up as | |
818 // x > y ? y : x or x >= y ? y : x | |
819 if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) && | |
820 ifop->x() == ifop->fval() && | |
821 ifop->y() == ifop->tval()) { | |
822 length_limit = ifop->y(); | |
823 } | |
824 } | |
825 | |
826 // try to skip null checks and range checks | |
827 NewArray* src_array = src->as_NewArray(); | |
828 if (src_array != NULL) { | |
0 | 829 flags &= ~LIR_OpArrayCopy::src_null_check; |
2446 | 830 if (length_limit != NULL && |
831 src_array->length() == length_limit && | |
832 is_constant_zero(src_pos)) { | |
833 flags &= ~LIR_OpArrayCopy::src_range_check; | |
834 } | |
835 } | |
836 | |
837 NewArray* dst_array = dst->as_NewArray(); | |
838 if (dst_array != NULL) { | |
0 | 839 flags &= ~LIR_OpArrayCopy::dst_null_check; |
2446 | 840 if (length_limit != NULL && |
841 dst_array->length() == length_limit && | |
842 is_constant_zero(dst_pos)) { | |
843 flags &= ~LIR_OpArrayCopy::dst_range_check; | |
844 } | |
845 } | |
0 | 846 |
847 // check from incoming constant values | |
848 if (positive_constant(src_pos)) | |
849 flags &= ~LIR_OpArrayCopy::src_pos_positive_check; | |
850 if (positive_constant(dst_pos)) | |
851 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check; | |
852 if (positive_constant(length)) | |
853 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
854 | |
855 // see if the range check can be elided, which might also imply | |
856 // that src or dst is non-null. | |
857 ArrayLength* al = length->as_ArrayLength(); | |
858 if (al != NULL) { | |
859 if (al->array() == src) { | |
860 // it's the length of the source array | |
861 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
862 flags &= ~LIR_OpArrayCopy::src_null_check; | |
863 if (is_constant_zero(src_pos)) | |
864 flags &= ~LIR_OpArrayCopy::src_range_check; | |
865 } | |
866 if (al->array() == dst) { | |
867 // it's the length of the destination array | |
868 flags &= ~LIR_OpArrayCopy::length_positive_check; | |
869 flags &= ~LIR_OpArrayCopy::dst_null_check; | |
870 if (is_constant_zero(dst_pos)) | |
871 flags &= ~LIR_OpArrayCopy::dst_range_check; | |
872 } | |
873 } | |
874 if (is_exact) { | |
875 flags &= ~LIR_OpArrayCopy::type_check; | |
876 } | |
877 } | |
878 | |
2446 | 879 IntConstant* src_int = src_pos->type()->as_IntConstant(); |
880 IntConstant* dst_int = dst_pos->type()->as_IntConstant(); | |
881 if (src_int && dst_int) { | |
882 int s_offs = src_int->value(); | |
883 int d_offs = dst_int->value(); | |
884 if (src_int->value() >= dst_int->value()) { | |
885 flags &= ~LIR_OpArrayCopy::overlapping; | |
886 } | |
887 if (expected_type != NULL) { | |
888 BasicType t = expected_type->element_type()->basic_type(); | |
889 int element_size = type2aelembytes(t); | |
890 if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && | |
891 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) { | |
892 flags &= ~LIR_OpArrayCopy::unaligned; | |
893 } | |
894 } | |
895 } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) { | |
896 // src and dest positions are the same, or dst is zero so assume | |
897 // nonoverlapping copy. | |
898 flags &= ~LIR_OpArrayCopy::overlapping; | |
899 } | |
900 | |
0 | 901 if (src == dst) { |
902 // moving within a single array so no type checks are needed | |
903 if (flags & LIR_OpArrayCopy::type_check) { | |
904 flags &= ~LIR_OpArrayCopy::type_check; | |
905 } | |
906 } | |
907 *flagsp = flags; | |
908 *expected_typep = (ciArrayKlass*)expected_type; | |
909 } | |
910 | |
911 | |
912 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) { | |
913 assert(opr->is_register(), "why spill if item is not register?"); | |
914 | |
915 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) { | |
916 LIR_Opr result = new_register(T_FLOAT); | |
917 set_vreg_flag(result, must_start_in_memory); | |
918 assert(opr->is_register(), "only a register can be spilled"); | |
919 assert(opr->value_type()->is_float(), "rounding only for floats available"); | |
920 __ roundfp(opr, LIR_OprFact::illegalOpr, result); | |
921 return result; | |
922 } | |
923 return opr; | |
924 } | |
925 | |
926 | |
927 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) { | |
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928 assert(type2size[t] == type2size[value->type()], |
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929 err_msg_res("size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()))); |
0 | 930 if (!value->is_register()) { |
931 // force into a register | |
932 LIR_Opr r = new_register(value->type()); | |
933 __ move(value, r); | |
934 value = r; | |
935 } | |
936 | |
937 // create a spill location | |
938 LIR_Opr tmp = new_register(t); | |
939 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory); | |
940 | |
941 // move from register to spill | |
942 __ move(value, tmp); | |
943 return tmp; | |
944 } | |
945 | |
946 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) { | |
947 if (if_instr->should_profile()) { | |
948 ciMethod* method = if_instr->profiled_method(); | |
949 assert(method != NULL, "method should be set if branch is profiled"); | |
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950 ciMethodData* md = method->method_data_or_null(); |
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951 assert(md != NULL, "Sanity"); |
0 | 952 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci()); |
953 assert(data != NULL, "must have profiling data"); | |
954 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
955 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); | |
956 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); | |
1783 | 957 if (if_instr->is_swapped()) { |
958 int t = taken_count_offset; | |
959 taken_count_offset = not_taken_count_offset; | |
960 not_taken_count_offset = t; | |
961 } | |
962 | |
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963 LIR_Opr md_reg = new_register(T_METADATA); |
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964 __ metadata2reg(md->constant_encoding(), md_reg); |
1783 | 965 |
966 LIR_Opr data_offset_reg = new_pointer_register(); | |
0 | 967 __ cmove(lir_cond(cond), |
1783 | 968 LIR_OprFact::intptrConst(taken_count_offset), |
969 LIR_OprFact::intptrConst(not_taken_count_offset), | |
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970 data_offset_reg, as_BasicType(if_instr->x()->type())); |
1783 | 971 |
972 // MDO cells are intptr_t, so the data_reg width is arch-dependent. | |
973 LIR_Opr data_reg = new_pointer_register(); | |
974 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); | |
2002 | 975 __ move(data_addr, data_reg); |
1783 | 976 // Use leal instead of add to avoid destroying condition codes on x86 |
0 | 977 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT); |
978 __ leal(LIR_OprFact::address(fake_incr_value), data_reg); | |
2002 | 979 __ move(data_reg, data_addr); |
0 | 980 } |
981 } | |
982 | |
983 // Phi technique: | |
984 // This is about passing live values from one basic block to the other. | |
985 // In code generated with Java it is rather rare that more than one | |
986 // value is on the stack from one basic block to the other. | |
987 // We optimize our technique for efficient passing of one value | |
988 // (of type long, int, double..) but it can be extended. | |
989 // When entering or leaving a basic block, all registers and all spill | |
990 // slots are release and empty. We use the released registers | |
991 // and spill slots to pass the live values from one block | |
992 // to the other. The topmost value, i.e., the value on TOS of expression | |
993 // stack is passed in registers. All other values are stored in spilling | |
994 // area. Every Phi has an index which designates its spill slot | |
995 // At exit of a basic block, we fill the register(s) and spill slots. | |
996 // At entry of a basic block, the block_prolog sets up the content of phi nodes | |
997 // and locks necessary registers and spilling slots. | |
998 | |
999 | |
1000 // move current value to referenced phi function | |
1001 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) { | |
1002 Phi* phi = sux_val->as_Phi(); | |
1003 // cur_val can be null without phi being null in conjunction with inlining | |
1004 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) { | |
1005 LIR_Opr operand = cur_val->operand(); | |
1006 if (cur_val->operand()->is_illegal()) { | |
1007 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL, | |
1008 "these can be produced lazily"); | |
1009 operand = operand_for_instruction(cur_val); | |
1010 } | |
1011 resolver->move(operand, operand_for_instruction(phi)); | |
1012 } | |
1013 } | |
1014 | |
1015 | |
1016 // Moves all stack values into their PHI position | |
1017 void LIRGenerator::move_to_phi(ValueStack* cur_state) { | |
1018 BlockBegin* bb = block(); | |
1019 if (bb->number_of_sux() == 1) { | |
1020 BlockBegin* sux = bb->sux_at(0); | |
1021 assert(sux->number_of_preds() > 0, "invalid CFG"); | |
1022 | |
1023 // a block with only one predecessor never has phi functions | |
1024 if (sux->number_of_preds() > 1) { | |
1025 int max_phis = cur_state->stack_size() + cur_state->locals_size(); | |
1026 PhiResolver resolver(this, _virtual_register_number + max_phis * 2); | |
1027 | |
1028 ValueStack* sux_state = sux->state(); | |
1029 Value sux_value; | |
1030 int index; | |
1031 | |
1819 | 1032 assert(cur_state->scope() == sux_state->scope(), "not matching"); |
1033 assert(cur_state->locals_size() == sux_state->locals_size(), "not matching"); | |
1034 assert(cur_state->stack_size() == sux_state->stack_size(), "not matching"); | |
1035 | |
0 | 1036 for_each_stack_value(sux_state, index, sux_value) { |
1037 move_to_phi(&resolver, cur_state->stack_at(index), sux_value); | |
1038 } | |
1039 | |
1040 for_each_local_value(sux_state, index, sux_value) { | |
1041 move_to_phi(&resolver, cur_state->local_at(index), sux_value); | |
1042 } | |
1043 | |
1044 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal"); | |
1045 } | |
1046 } | |
1047 } | |
1048 | |
1049 | |
1050 LIR_Opr LIRGenerator::new_register(BasicType type) { | |
1051 int vreg = _virtual_register_number; | |
1052 // add a little fudge factor for the bailout, since the bailout is | |
1053 // only checked periodically. This gives a few extra registers to | |
1054 // hand out before we really run out, which helps us keep from | |
1055 // tripping over assertions. | |
1056 if (vreg + 20 >= LIR_OprDesc::vreg_max) { | |
1057 bailout("out of virtual registers"); | |
1058 if (vreg + 2 >= LIR_OprDesc::vreg_max) { | |
1059 // wrap it around | |
1060 _virtual_register_number = LIR_OprDesc::vreg_base; | |
1061 } | |
1062 } | |
1063 _virtual_register_number += 1; | |
1064 return LIR_OprFact::virtual_register(vreg, type); | |
1065 } | |
1066 | |
1067 | |
1068 // Try to lock using register in hint | |
1069 LIR_Opr LIRGenerator::rlock(Value instr) { | |
1070 return new_register(instr->type()); | |
1071 } | |
1072 | |
1073 | |
1074 // does an rlock and sets result | |
1075 LIR_Opr LIRGenerator::rlock_result(Value x) { | |
1076 LIR_Opr reg = rlock(x); | |
1077 set_result(x, reg); | |
1078 return reg; | |
1079 } | |
1080 | |
1081 | |
1082 // does an rlock and sets result | |
1083 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) { | |
1084 LIR_Opr reg; | |
1085 switch (type) { | |
1086 case T_BYTE: | |
1087 case T_BOOLEAN: | |
1088 reg = rlock_byte(type); | |
1089 break; | |
1090 default: | |
1091 reg = rlock(x); | |
1092 break; | |
1093 } | |
1094 | |
1095 set_result(x, reg); | |
1096 return reg; | |
1097 } | |
1098 | |
1099 | |
1100 //--------------------------------------------------------------------- | |
1101 ciObject* LIRGenerator::get_jobject_constant(Value value) { | |
1102 ObjectType* oc = value->type()->as_ObjectType(); | |
1103 if (oc) { | |
1104 return oc->constant_value(); | |
1105 } | |
1106 return NULL; | |
1107 } | |
1108 | |
1109 | |
1110 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) { | |
1111 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block"); | |
1112 assert(block()->next() == x, "ExceptionObject must be first instruction of block"); | |
1113 | |
1114 // no moves are created for phi functions at the begin of exception | |
1115 // handlers, so assign operands manually here | |
1116 for_each_phi_fun(block(), phi, | |
1117 operand_for_instruction(phi)); | |
1118 | |
1119 LIR_Opr thread_reg = getThreadPointer(); | |
2002 | 1120 __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT), |
1121 exceptionOopOpr()); | |
1122 __ move_wide(LIR_OprFact::oopConst(NULL), | |
1123 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT)); | |
1124 __ move_wide(LIR_OprFact::oopConst(NULL), | |
1125 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT)); | |
0 | 1126 |
1127 LIR_Opr result = new_register(T_OBJECT); | |
1128 __ move(exceptionOopOpr(), result); | |
1129 set_result(x, result); | |
1130 } | |
1131 | |
1132 | |
1133 //---------------------------------------------------------------------- | |
1134 //---------------------------------------------------------------------- | |
1135 //---------------------------------------------------------------------- | |
1136 //---------------------------------------------------------------------- | |
1137 // visitor functions | |
1138 //---------------------------------------------------------------------- | |
1139 //---------------------------------------------------------------------- | |
1140 //---------------------------------------------------------------------- | |
1141 //---------------------------------------------------------------------- | |
1142 | |
1143 void LIRGenerator::do_Phi(Phi* x) { | |
1144 // phi functions are never visited directly | |
1145 ShouldNotReachHere(); | |
1146 } | |
1147 | |
1148 | |
1149 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined. | |
1150 void LIRGenerator::do_Constant(Constant* x) { | |
1819 | 1151 if (x->state_before() != NULL) { |
0 | 1152 // Any constant with a ValueStack requires patching so emit the patch here |
1153 LIR_Opr reg = rlock_result(x); | |
1819 | 1154 CodeEmitInfo* info = state_for(x, x->state_before()); |
0 | 1155 __ oop2reg_patch(NULL, reg, info); |
1156 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) { | |
1157 if (!x->is_pinned()) { | |
1158 // unpinned constants are handled specially so that they can be | |
1159 // put into registers when they are used multiple times within a | |
1160 // block. After the block completes their operand will be | |
1161 // cleared so that other blocks can't refer to that register. | |
1162 set_result(x, load_constant(x)); | |
1163 } else { | |
1164 LIR_Opr res = x->operand(); | |
1165 if (!res->is_valid()) { | |
1166 res = LIR_OprFact::value_type(x->type()); | |
1167 } | |
1168 if (res->is_constant()) { | |
1169 LIR_Opr reg = rlock_result(x); | |
1170 __ move(res, reg); | |
1171 } else { | |
1172 set_result(x, res); | |
1173 } | |
1174 } | |
1175 } else { | |
1176 set_result(x, LIR_OprFact::value_type(x->type())); | |
1177 } | |
1178 } | |
1179 | |
1180 | |
1181 void LIRGenerator::do_Local(Local* x) { | |
1182 // operand_for_instruction has the side effect of setting the result | |
1183 // so there's no need to do it here. | |
1184 operand_for_instruction(x); | |
1185 } | |
1186 | |
1187 | |
1188 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) { | |
1189 Unimplemented(); | |
1190 } | |
1191 | |
1192 | |
1193 void LIRGenerator::do_Return(Return* x) { | |
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1194 if (compilation()->env()->dtrace_method_probes()) { |
0 | 1195 BasicTypeList signature; |
2002 | 1196 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread |
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1197 signature.append(T_OBJECT); // Method* |
0 | 1198 LIR_OprList* args = new LIR_OprList(); |
1199 args->append(getThreadPointer()); | |
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1200 LIR_Opr meth = new_register(T_METADATA); |
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1201 __ metadata2reg(method()->constant_encoding(), meth); |
0 | 1202 args->append(meth); |
1203 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL); | |
1204 } | |
1205 | |
1206 if (x->type()->is_void()) { | |
1207 __ return_op(LIR_OprFact::illegalOpr); | |
1208 } else { | |
1209 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true); | |
1210 LIRItem result(x->result(), this); | |
1211 | |
1212 result.load_item_force(reg); | |
1213 __ return_op(result.result()); | |
1214 } | |
1215 set_no_result(x); | |
1216 } | |
1217 | |
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1218 // Examble: ref.get() |
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1219 // Combination of LoadField and g1 pre-write barrier |
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1220 void LIRGenerator::do_Reference_get(Intrinsic* x) { |
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1221 |
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1222 const int referent_offset = java_lang_ref_Reference::referent_offset; |
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1223 guarantee(referent_offset > 0, "referent offset not initialized"); |
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1224 |
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1225 assert(x->number_of_arguments() == 1, "wrong type"); |
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1226 |
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1227 LIRItem reference(x->argument_at(0), this); |
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1228 reference.load_item(); |
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1229 |
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1230 // need to perform the null check on the reference objecy |
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1231 CodeEmitInfo* info = NULL; |
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1232 if (x->needs_null_check()) { |
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1233 info = state_for(x); |
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1234 } |
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1235 |
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1236 LIR_Address* referent_field_adr = |
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1237 new LIR_Address(reference.result(), referent_offset, T_OBJECT); |
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1238 |
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1239 LIR_Opr result = rlock_result(x); |
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1240 |
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1241 __ load(referent_field_adr, result, info); |
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1242 |
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1243 // Register the value in the referent field with the pre-barrier |
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1244 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, |
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1245 result /* pre_val */, |
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1246 false /* do_load */, |
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1247 false /* patch */, |
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1248 NULL /* info */); |
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1249 } |
0 | 1250 |
6135 | 1251 // Example: clazz.isInstance(object) |
1252 void LIRGenerator::do_isInstance(Intrinsic* x) { | |
1253 assert(x->number_of_arguments() == 2, "wrong type"); | |
1254 | |
1255 // TODO could try to substitute this node with an equivalent InstanceOf | |
1256 // if clazz is known to be a constant Class. This will pick up newly found | |
1257 // constants after HIR construction. I'll leave this to a future change. | |
1258 | |
1259 // as a first cut, make a simple leaf call to runtime to stay platform independent. | |
1260 // could follow the aastore example in a future change. | |
1261 | |
1262 LIRItem clazz(x->argument_at(0), this); | |
1263 LIRItem object(x->argument_at(1), this); | |
1264 clazz.load_item(); | |
1265 object.load_item(); | |
1266 LIR_Opr result = rlock_result(x); | |
1267 | |
1268 // need to perform null check on clazz | |
1269 if (x->needs_null_check()) { | |
1270 CodeEmitInfo* info = state_for(x); | |
1271 __ null_check(clazz.result(), info); | |
1272 } | |
1273 | |
1274 LIR_Opr call_result = call_runtime(clazz.value(), object.value(), | |
1275 CAST_FROM_FN_PTR(address, Runtime1::is_instance_of), | |
1276 x->type(), | |
1277 NULL); // NULL CodeEmitInfo results in a leaf call | |
1278 __ move(call_result, result); | |
1279 } | |
1280 | |
0 | 1281 // Example: object.getClass () |
1282 void LIRGenerator::do_getClass(Intrinsic* x) { | |
1283 assert(x->number_of_arguments() == 1, "wrong type"); | |
1284 | |
1285 LIRItem rcvr(x->argument_at(0), this); | |
1286 rcvr.load_item(); | |
1287 LIR_Opr result = rlock_result(x); | |
1288 | |
1289 // need to perform the null check on the rcvr | |
1290 CodeEmitInfo* info = NULL; | |
1291 if (x->needs_null_check()) { | |
1819 | 1292 info = state_for(x); |
0 | 1293 } |
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1294 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), result, info); |
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1295 __ move_wide(new LIR_Address(result, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result); |
0 | 1296 } |
1297 | |
1298 | |
1299 // Example: Thread.currentThread() | |
1300 void LIRGenerator::do_currentThread(Intrinsic* x) { | |
1301 assert(x->number_of_arguments() == 0, "wrong type"); | |
1302 LIR_Opr reg = rlock_result(x); | |
2002 | 1303 __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg); |
0 | 1304 } |
1305 | |
1306 | |
1307 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) { | |
1308 assert(x->number_of_arguments() == 1, "wrong type"); | |
1309 LIRItem receiver(x->argument_at(0), this); | |
1310 | |
1311 receiver.load_item(); | |
1312 BasicTypeList signature; | |
1313 signature.append(T_OBJECT); // receiver | |
1314 LIR_OprList* args = new LIR_OprList(); | |
1315 args->append(receiver.result()); | |
1316 CodeEmitInfo* info = state_for(x, x->state()); | |
1317 call_runtime(&signature, args, | |
1318 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)), | |
1319 voidType, info); | |
1320 | |
1321 set_no_result(x); | |
1322 } | |
1323 | |
1324 | |
1325 //------------------------local access-------------------------------------- | |
1326 | |
1327 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) { | |
1328 if (x->operand()->is_illegal()) { | |
1329 Constant* c = x->as_Constant(); | |
1330 if (c != NULL) { | |
1331 x->set_operand(LIR_OprFact::value_type(c->type())); | |
1332 } else { | |
1333 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local"); | |
1334 // allocate a virtual register for this local or phi | |
1335 x->set_operand(rlock(x)); | |
1336 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL); | |
1337 } | |
1338 } | |
1339 return x->operand(); | |
1340 } | |
1341 | |
1342 | |
1343 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) { | |
1344 if (opr->is_virtual()) { | |
1345 return instruction_for_vreg(opr->vreg_number()); | |
1346 } | |
1347 return NULL; | |
1348 } | |
1349 | |
1350 | |
1351 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) { | |
1352 if (reg_num < _instruction_for_operand.length()) { | |
1353 return _instruction_for_operand.at(reg_num); | |
1354 } | |
1355 return NULL; | |
1356 } | |
1357 | |
1358 | |
1359 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) { | |
1360 if (_vreg_flags.size_in_bits() == 0) { | |
1361 BitMap2D temp(100, num_vreg_flags); | |
1362 temp.clear(); | |
1363 _vreg_flags = temp; | |
1364 } | |
1365 _vreg_flags.at_put_grow(vreg_num, f, true); | |
1366 } | |
1367 | |
1368 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) { | |
1369 if (!_vreg_flags.is_valid_index(vreg_num, f)) { | |
1370 return false; | |
1371 } | |
1372 return _vreg_flags.at(vreg_num, f); | |
1373 } | |
1374 | |
1375 | |
1376 // Block local constant handling. This code is useful for keeping | |
1377 // unpinned constants and constants which aren't exposed in the IR in | |
1378 // registers. Unpinned Constant instructions have their operands | |
1379 // cleared when the block is finished so that other blocks can't end | |
1380 // up referring to their registers. | |
1381 | |
1382 LIR_Opr LIRGenerator::load_constant(Constant* x) { | |
1383 assert(!x->is_pinned(), "only for unpinned constants"); | |
1384 _unpinned_constants.append(x); | |
1385 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr()); | |
1386 } | |
1387 | |
1388 | |
1389 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) { | |
1390 BasicType t = c->type(); | |
1391 for (int i = 0; i < _constants.length(); i++) { | |
1392 LIR_Const* other = _constants.at(i); | |
1393 if (t == other->type()) { | |
1394 switch (t) { | |
1395 case T_INT: | |
1396 case T_FLOAT: | |
1397 if (c->as_jint_bits() != other->as_jint_bits()) continue; | |
1398 break; | |
1399 case T_LONG: | |
1400 case T_DOUBLE: | |
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1401 if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue; |
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1402 if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue; |
0 | 1403 break; |
1404 case T_OBJECT: | |
1405 if (c->as_jobject() != other->as_jobject()) continue; | |
1406 break; | |
1407 } | |
1408 return _reg_for_constants.at(i); | |
1409 } | |
1410 } | |
1411 | |
1412 LIR_Opr result = new_register(t); | |
1413 __ move((LIR_Opr)c, result); | |
1414 _constants.append(c); | |
1415 _reg_for_constants.append(result); | |
1416 return result; | |
1417 } | |
1418 | |
1419 // Various barriers | |
1420 | |
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1421 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, |
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1422 bool do_load, bool patch, CodeEmitInfo* info) { |
342 | 1423 // Do the pre-write barrier, if any. |
1424 switch (_bs->kind()) { | |
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1425 #if INCLUDE_ALL_GCS |
342 | 1426 case BarrierSet::G1SATBCT: |
1427 case BarrierSet::G1SATBCTLogging: | |
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1428 G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info); |
342 | 1429 break; |
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1430 #endif // INCLUDE_ALL_GCS |
342 | 1431 case BarrierSet::CardTableModRef: |
1432 case BarrierSet::CardTableExtension: | |
1433 // No pre barriers | |
1434 break; | |
1435 case BarrierSet::ModRef: | |
1436 case BarrierSet::Other: | |
1437 // No pre barriers | |
1438 break; | |
1439 default : | |
1440 ShouldNotReachHere(); | |
1441 | |
1442 } | |
1443 } | |
1444 | |
0 | 1445 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
342 | 1446 switch (_bs->kind()) { |
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1447 #if INCLUDE_ALL_GCS |
342 | 1448 case BarrierSet::G1SATBCT: |
1449 case BarrierSet::G1SATBCTLogging: | |
1450 G1SATBCardTableModRef_post_barrier(addr, new_val); | |
1451 break; | |
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1452 #endif // INCLUDE_ALL_GCS |
0 | 1453 case BarrierSet::CardTableModRef: |
1454 case BarrierSet::CardTableExtension: | |
1455 CardTableModRef_post_barrier(addr, new_val); | |
1456 break; | |
1457 case BarrierSet::ModRef: | |
1458 case BarrierSet::Other: | |
1459 // No post barriers | |
1460 break; | |
1461 default : | |
1462 ShouldNotReachHere(); | |
1463 } | |
1464 } | |
1465 | |
342 | 1466 //////////////////////////////////////////////////////////////////////// |
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1467 #if INCLUDE_ALL_GCS |
342 | 1468 |
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1469 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, |
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1470 bool do_load, bool patch, CodeEmitInfo* info) { |
342 | 1471 // First we test whether marking is in progress. |
1472 BasicType flag_type; | |
1473 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
1474 flag_type = T_INT; | |
1475 } else { | |
1476 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, | |
1477 "Assumption"); | |
1478 flag_type = T_BYTE; | |
1479 } | |
1480 LIR_Opr thrd = getThreadPointer(); | |
1481 LIR_Address* mark_active_flag_addr = | |
1482 new LIR_Address(thrd, | |
1483 in_bytes(JavaThread::satb_mark_queue_offset() + | |
1484 PtrQueue::byte_offset_of_active()), | |
1485 flag_type); | |
1486 // Read the marking-in-progress flag. | |
1487 LIR_Opr flag_val = new_register(T_INT); | |
1488 __ load(mark_active_flag_addr, flag_val); | |
1489 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0)); | |
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1490 |
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1491 LIR_PatchCode pre_val_patch_code = lir_patch_none; |
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1492 |
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1493 CodeStub* slow; |
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1494 |
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1495 if (do_load) { |
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1496 assert(pre_val == LIR_OprFact::illegalOpr, "sanity"); |
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1497 assert(addr_opr != LIR_OprFact::illegalOpr, "sanity"); |
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1498 |
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1499 if (patch) |
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1500 pre_val_patch_code = lir_patch_normal; |
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1501 |
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1502 pre_val = new_register(T_OBJECT); |
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1503 |
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1504 if (!addr_opr->is_address()) { |
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1505 assert(addr_opr->is_register(), "must be"); |
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1506 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT)); |
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1507 } |
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1508 slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, info); |
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1509 } else { |
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1510 assert(addr_opr == LIR_OprFact::illegalOpr, "sanity"); |
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1511 assert(pre_val->is_register(), "must be"); |
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1512 assert(pre_val->type() == T_OBJECT, "must be an object"); |
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1513 assert(info == NULL, "sanity"); |
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1514 |
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1515 slow = new G1PreBarrierStub(pre_val); |
342 | 1516 } |
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1517 |
342 | 1518 __ branch(lir_cond_notEqual, T_INT, slow); |
1519 __ branch_destination(slow->continuation()); | |
1520 } | |
1521 | |
1522 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { | |
1523 // If the "new_val" is a constant NULL, no barrier is necessary. | |
1524 if (new_val->is_constant() && | |
1525 new_val->as_constant_ptr()->as_jobject() == NULL) return; | |
1526 | |
1527 if (!new_val->is_register()) { | |
1572 | 1528 LIR_Opr new_val_reg = new_register(T_OBJECT); |
342 | 1529 if (new_val->is_constant()) { |
1530 __ move(new_val, new_val_reg); | |
1531 } else { | |
1532 __ leal(new_val, new_val_reg); | |
1533 } | |
1534 new_val = new_val_reg; | |
1535 } | |
1536 assert(new_val->is_register(), "must be a register at this point"); | |
1537 | |
1538 if (addr->is_address()) { | |
1539 LIR_Address* address = addr->as_address_ptr(); | |
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1540 LIR_Opr ptr = new_pointer_register(); |
342 | 1541 if (!address->index()->is_valid() && address->disp() == 0) { |
1542 __ move(address->base(), ptr); | |
1543 } else { | |
1544 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); | |
1545 __ leal(addr, ptr); | |
1546 } | |
1547 addr = ptr; | |
1548 } | |
1549 assert(addr->is_register(), "must be a register at this point"); | |
1550 | |
1551 LIR_Opr xor_res = new_pointer_register(); | |
1552 LIR_Opr xor_shift_res = new_pointer_register(); | |
1553 if (TwoOperandLIRForm ) { | |
1554 __ move(addr, xor_res); | |
1555 __ logical_xor(xor_res, new_val, xor_res); | |
1556 __ move(xor_res, xor_shift_res); | |
1557 __ unsigned_shift_right(xor_shift_res, | |
1558 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), | |
1559 xor_shift_res, | |
1560 LIR_OprDesc::illegalOpr()); | |
1561 } else { | |
1562 __ logical_xor(addr, new_val, xor_res); | |
1563 __ unsigned_shift_right(xor_res, | |
1564 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), | |
1565 xor_shift_res, | |
1566 LIR_OprDesc::illegalOpr()); | |
1567 } | |
1568 | |
1569 if (!new_val->is_register()) { | |
1572 | 1570 LIR_Opr new_val_reg = new_register(T_OBJECT); |
342 | 1571 __ leal(new_val, new_val_reg); |
1572 new_val = new_val_reg; | |
1573 } | |
1574 assert(new_val->is_register(), "must be a register at this point"); | |
1575 | |
1576 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD)); | |
1577 | |
1578 CodeStub* slow = new G1PostBarrierStub(addr, new_val); | |
1572 | 1579 __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow); |
342 | 1580 __ branch_destination(slow->continuation()); |
1581 } | |
1582 | |
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1583 #endif // INCLUDE_ALL_GCS |
342 | 1584 //////////////////////////////////////////////////////////////////////// |
1585 | |
0 | 1586 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
1587 | |
342 | 1588 assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code"); |
1589 LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base); | |
0 | 1590 if (addr->is_address()) { |
1591 LIR_Address* address = addr->as_address_ptr(); | |
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1592 // ptr cannot be an object because we use this barrier for array card marks |
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1593 // and addr can point in the middle of an array. |
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1594 LIR_Opr ptr = new_pointer_register(); |
0 | 1595 if (!address->index()->is_valid() && address->disp() == 0) { |
1596 __ move(address->base(), ptr); | |
1597 } else { | |
1598 assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); | |
1599 __ leal(addr, ptr); | |
1600 } | |
1601 addr = ptr; | |
1602 } | |
1603 assert(addr->is_register(), "must be a register at this point"); | |
1604 | |
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1605 #ifdef ARM |
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1606 // TODO: ARM - move to platform-dependent code |
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1607 LIR_Opr tmp = FrameMap::R14_opr; |
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1608 if (VM_Version::supports_movw()) { |
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1609 __ move((LIR_Opr)card_table_base, tmp); |
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1610 } else { |
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1611 __ move(new LIR_Address(FrameMap::Rthread_opr, in_bytes(JavaThread::card_table_base_offset()), T_ADDRESS), tmp); |
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1612 } |
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1613 |
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1614 CardTableModRefBS* ct = (CardTableModRefBS*)_bs; |
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1615 LIR_Address *card_addr = new LIR_Address(tmp, addr, (LIR_Address::Scale) -CardTableModRefBS::card_shift, 0, T_BYTE); |
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1616 if(((int)ct->byte_map_base & 0xff) == 0) { |
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1617 __ move(tmp, card_addr); |
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1618 } else { |
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1619 LIR_Opr tmp_zero = new_register(T_INT); |
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1620 __ move(LIR_OprFact::intConst(0), tmp_zero); |
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1621 __ move(tmp_zero, card_addr); |
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1622 } |
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1623 #else // ARM |
0 | 1624 LIR_Opr tmp = new_pointer_register(); |
1625 if (TwoOperandLIRForm) { | |
1626 __ move(addr, tmp); | |
1627 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp); | |
1628 } else { | |
1629 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp); | |
1630 } | |
1631 if (can_inline_as_constant(card_table_base)) { | |
1632 __ move(LIR_OprFact::intConst(0), | |
1633 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE)); | |
1634 } else { | |
1635 __ move(LIR_OprFact::intConst(0), | |
1636 new LIR_Address(tmp, load_constant(card_table_base), | |
1637 T_BYTE)); | |
1638 } | |
1681
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1639 #endif // ARM |
0 | 1640 } |
1641 | |
1642 | |
1643 //------------------------field access-------------------------------------- | |
1644 | |
1645 // Comment copied form templateTable_i486.cpp | |
1646 // ---------------------------------------------------------------------------- | |
1647 // Volatile variables demand their effects be made known to all CPU's in | |
1648 // order. Store buffers on most chips allow reads & writes to reorder; the | |
1649 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of | |
1650 // memory barrier (i.e., it's not sufficient that the interpreter does not | |
1651 // reorder volatile references, the hardware also must not reorder them). | |
1652 // | |
1653 // According to the new Java Memory Model (JMM): | |
1654 // (1) All volatiles are serialized wrt to each other. | |
1655 // ALSO reads & writes act as aquire & release, so: | |
1656 // (2) A read cannot let unrelated NON-volatile memory refs that happen after | |
1657 // the read float up to before the read. It's OK for non-volatile memory refs | |
1658 // that happen before the volatile read to float down below it. | |
1659 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs | |
1660 // that happen BEFORE the write float down to after the write. It's OK for | |
1661 // non-volatile memory refs that happen after the volatile write to float up | |
1662 // before it. | |
1663 // | |
1664 // We only put in barriers around volatile refs (they are expensive), not | |
1665 // _between_ memory refs (that would require us to track the flavor of the | |
1666 // previous memory refs). Requirements (2) and (3) require some barriers | |
1667 // before volatile stores and after volatile loads. These nearly cover | |
1668 // requirement (1) but miss the volatile-store-volatile-load case. This final | |
1669 // case is placed after volatile-stores although it could just as well go | |
1670 // before volatile-loads. | |
1671 | |
1672 | |
1673 void LIRGenerator::do_StoreField(StoreField* x) { | |
1674 bool needs_patching = x->needs_patching(); | |
1675 bool is_volatile = x->field()->is_volatile(); | |
1676 BasicType field_type = x->field_type(); | |
1677 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT); | |
1678 | |
1679 CodeEmitInfo* info = NULL; | |
1680 if (needs_patching) { | |
1681 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); | |
1682 info = state_for(x, x->state_before()); | |
1683 } else if (x->needs_null_check()) { | |
1684 NullCheck* nc = x->explicit_null_check(); | |
1685 if (nc == NULL) { | |
1819 | 1686 info = state_for(x); |
0 | 1687 } else { |
1688 info = state_for(nc); | |
1689 } | |
1690 } | |
1691 | |
1692 | |
1693 LIRItem object(x->obj(), this); | |
1694 LIRItem value(x->value(), this); | |
1695 | |
1696 object.load_item(); | |
1697 | |
1698 if (is_volatile || needs_patching) { | |
1699 // load item if field is volatile (fewer special cases for volatiles) | |
1700 // load item if field not initialized | |
1701 // load item if field not constant | |
1702 // because of code patching we cannot inline constants | |
1703 if (field_type == T_BYTE || field_type == T_BOOLEAN) { | |
1704 value.load_byte_item(); | |
1705 } else { | |
1706 value.load_item(); | |
1707 } | |
1708 } else { | |
1709 value.load_for_store(field_type); | |
1710 } | |
1711 | |
1712 set_no_result(x); | |
1713 | |
1819 | 1714 #ifndef PRODUCT |
0 | 1715 if (PrintNotLoaded && needs_patching) { |
1716 tty->print_cr(" ###class not loaded at store_%s bci %d", | |
1819 | 1717 x->is_static() ? "static" : "field", x->printable_bci()); |
0 | 1718 } |
1819 | 1719 #endif |
0 | 1720 |
1721 if (x->needs_null_check() && | |
1722 (needs_patching || | |
1723 MacroAssembler::needs_explicit_null_check(x->offset()))) { | |
1724 // emit an explicit null check because the offset is too large | |
1725 __ null_check(object.result(), new CodeEmitInfo(info)); | |
1726 } | |
1727 | |
1728 LIR_Address* address; | |
1729 if (needs_patching) { | |
1730 // we need to patch the offset in the instruction so don't allow | |
1731 // generate_address to try to be smart about emitting the -1. | |
1732 // Otherwise the patching code won't know how to find the | |
1733 // instruction to patch. | |
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1734 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
0 | 1735 } else { |
1736 address = generate_address(object.result(), x->offset(), field_type); | |
1737 } | |
1738 | |
1739 if (is_volatile && os::is_MP()) { | |
1740 __ membar_release(); | |
1741 } | |
1742 | |
342 | 1743 if (is_oop) { |
1744 // Do the pre-write barrier, if any. | |
1745 pre_barrier(LIR_OprFact::address(address), | |
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1746 LIR_OprFact::illegalOpr /* pre_val */, |
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1747 true /* do_load*/, |
342 | 1748 needs_patching, |
1749 (info ? new CodeEmitInfo(info) : NULL)); | |
1750 } | |
1751 | |
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1752 if (is_volatile && !needs_patching) { |
0 | 1753 volatile_field_store(value.result(), address, info); |
1754 } else { | |
1755 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; | |
1756 __ store(value.result(), address, info, patch_code); | |
1757 } | |
1758 | |
1759 if (is_oop) { | |
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1760 // Store to object so mark the card of the header |
0 | 1761 post_barrier(object.result(), value.result()); |
1762 } | |
1763 | |
1764 if (is_volatile && os::is_MP()) { | |
1765 __ membar(); | |
1766 } | |
1767 } | |
1768 | |
1769 | |
1770 void LIRGenerator::do_LoadField(LoadField* x) { | |
1771 bool needs_patching = x->needs_patching(); | |
1772 bool is_volatile = x->field()->is_volatile(); | |
1773 BasicType field_type = x->field_type(); | |
1774 | |
1775 CodeEmitInfo* info = NULL; | |
1776 if (needs_patching) { | |
1777 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); | |
1778 info = state_for(x, x->state_before()); | |
1779 } else if (x->needs_null_check()) { | |
1780 NullCheck* nc = x->explicit_null_check(); | |
1781 if (nc == NULL) { | |
1819 | 1782 info = state_for(x); |
0 | 1783 } else { |
1784 info = state_for(nc); | |
1785 } | |
1786 } | |
1787 | |
1788 LIRItem object(x->obj(), this); | |
1789 | |
1790 object.load_item(); | |
1791 | |
1819 | 1792 #ifndef PRODUCT |
0 | 1793 if (PrintNotLoaded && needs_patching) { |
1794 tty->print_cr(" ###class not loaded at load_%s bci %d", | |
1819 | 1795 x->is_static() ? "static" : "field", x->printable_bci()); |
0 | 1796 } |
1819 | 1797 #endif |
0 | 1798 |
8860 | 1799 bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception(); |
0 | 1800 if (x->needs_null_check() && |
1801 (needs_patching || | |
8860 | 1802 MacroAssembler::needs_explicit_null_check(x->offset()) || |
1803 stress_deopt)) { | |
1804 LIR_Opr obj = object.result(); | |
1805 if (stress_deopt) { | |
1806 obj = new_register(T_OBJECT); | |
1807 __ move(LIR_OprFact::oopConst(NULL), obj); | |
1808 } | |
0 | 1809 // emit an explicit null check because the offset is too large |
8860 | 1810 __ null_check(obj, new CodeEmitInfo(info)); |
0 | 1811 } |
1812 | |
1813 LIR_Opr reg = rlock_result(x, field_type); | |
1814 LIR_Address* address; | |
1815 if (needs_patching) { | |
1816 // we need to patch the offset in the instruction so don't allow | |
1817 // generate_address to try to be smart about emitting the -1. | |
1818 // Otherwise the patching code won't know how to find the | |
1819 // instruction to patch. | |
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1820 address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
0 | 1821 } else { |
1822 address = generate_address(object.result(), x->offset(), field_type); | |
1823 } | |
1824 | |
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1825 if (is_volatile && !needs_patching) { |
0 | 1826 volatile_field_load(address, reg, info); |
1827 } else { | |
1828 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; | |
1829 __ load(address, reg, info, patch_code); | |
1830 } | |
1831 | |
1832 if (is_volatile && os::is_MP()) { | |
1833 __ membar_acquire(); | |
1834 } | |
1835 } | |
1836 | |
1837 | |
1838 //------------------------java.nio.Buffer.checkIndex------------------------ | |
1839 | |
1840 // int java.nio.Buffer.checkIndex(int) | |
1841 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) { | |
1842 // NOTE: by the time we are in checkIndex() we are guaranteed that | |
1843 // the buffer is non-null (because checkIndex is package-private and | |
1844 // only called from within other methods in the buffer). | |
1845 assert(x->number_of_arguments() == 2, "wrong type"); | |
1846 LIRItem buf (x->argument_at(0), this); | |
1847 LIRItem index(x->argument_at(1), this); | |
1848 buf.load_item(); | |
1849 index.load_item(); | |
1850 | |
1851 LIR_Opr result = rlock_result(x); | |
1852 if (GenerateRangeChecks) { | |
1853 CodeEmitInfo* info = state_for(x); | |
1854 CodeStub* stub = new RangeCheckStub(info, index.result(), true); | |
1855 if (index.result()->is_constant()) { | |
1856 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info); | |
1857 __ branch(lir_cond_belowEqual, T_INT, stub); | |
1858 } else { | |
1859 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(), | |
1860 java_nio_Buffer::limit_offset(), T_INT, info); | |
1861 __ branch(lir_cond_aboveEqual, T_INT, stub); | |
1862 } | |
1863 __ move(index.result(), result); | |
1864 } else { | |
1865 // Just load the index into the result register | |
1866 __ move(index.result(), result); | |
1867 } | |
1868 } | |
1869 | |
1870 | |
1871 //------------------------array access-------------------------------------- | |
1872 | |
1873 | |
1874 void LIRGenerator::do_ArrayLength(ArrayLength* x) { | |
1875 LIRItem array(x->array(), this); | |
1876 array.load_item(); | |
1877 LIR_Opr reg = rlock_result(x); | |
1878 | |
1879 CodeEmitInfo* info = NULL; | |
1880 if (x->needs_null_check()) { | |
1881 NullCheck* nc = x->explicit_null_check(); | |
1882 if (nc == NULL) { | |
1883 info = state_for(x); | |
1884 } else { | |
1885 info = state_for(nc); | |
1886 } | |
8860 | 1887 if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) { |
1888 LIR_Opr obj = new_register(T_OBJECT); | |
1889 __ move(LIR_OprFact::oopConst(NULL), obj); | |
1890 __ null_check(obj, new CodeEmitInfo(info)); | |
1891 } | |
0 | 1892 } |
1893 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none); | |
1894 } | |
1895 | |
1896 | |
1897 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) { | |
1898 bool use_length = x->length() != NULL; | |
1899 LIRItem array(x->array(), this); | |
1900 LIRItem index(x->index(), this); | |
1901 LIRItem length(this); | |
8860 | 1902 bool needs_range_check = x->compute_needs_range_check(); |
1903 | |
1904 if (use_length && needs_range_check) { | |
1905 length.set_instruction(x->length()); | |
1906 length.load_item(); | |
0 | 1907 } |
1908 | |
1909 array.load_item(); | |
1910 if (index.is_constant() && can_inline_as_constant(x->index())) { | |
1911 // let it be a constant | |
1912 index.dont_load_item(); | |
1913 } else { | |
1914 index.load_item(); | |
1915 } | |
1916 | |
1917 CodeEmitInfo* range_check_info = state_for(x); | |
1918 CodeEmitInfo* null_check_info = NULL; | |
1919 if (x->needs_null_check()) { | |
1920 NullCheck* nc = x->explicit_null_check(); | |
1921 if (nc != NULL) { | |
1922 null_check_info = state_for(nc); | |
1923 } else { | |
1924 null_check_info = range_check_info; | |
1925 } | |
8860 | 1926 if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) { |
1927 LIR_Opr obj = new_register(T_OBJECT); | |
1928 __ move(LIR_OprFact::oopConst(NULL), obj); | |
1929 __ null_check(obj, new CodeEmitInfo(null_check_info)); | |
1930 } | |
0 | 1931 } |
1932 | |
1933 // emit array address setup early so it schedules better | |
1934 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false); | |
1935 | |
1936 if (GenerateRangeChecks && needs_range_check) { | |
8860 | 1937 if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) { |
1938 __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result())); | |
1939 } else if (use_length) { | |
0 | 1940 // TODO: use a (modified) version of array_range_check that does not require a |
1941 // constant length to be loaded to a register | |
1942 __ cmp(lir_cond_belowEqual, length.result(), index.result()); | |
1943 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); | |
1944 } else { | |
1945 array_range_check(array.result(), index.result(), null_check_info, range_check_info); | |
1946 // The range check performs the null check, so clear it out for the load | |
1947 null_check_info = NULL; | |
1948 } | |
1949 } | |
1950 | |
1951 __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info); | |
1952 } | |
1953 | |
1954 | |
1955 void LIRGenerator::do_NullCheck(NullCheck* x) { | |
1956 if (x->can_trap()) { | |
1957 LIRItem value(x->obj(), this); | |
1958 value.load_item(); | |
1959 CodeEmitInfo* info = state_for(x); | |
1960 __ null_check(value.result(), info); | |
1961 } | |
1962 } | |
1963 | |
1964 | |
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1965 void LIRGenerator::do_TypeCast(TypeCast* x) { |
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1966 LIRItem value(x->obj(), this); |
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1967 value.load_item(); |
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1968 // the result is the same as from the node we are casting |
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1969 set_result(x, value.result()); |
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1970 } |
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1971 |
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1972 |
0 | 1973 void LIRGenerator::do_Throw(Throw* x) { |
1974 LIRItem exception(x->exception(), this); | |
1975 exception.load_item(); | |
1976 set_no_result(x); | |
1977 LIR_Opr exception_opr = exception.result(); | |
1978 CodeEmitInfo* info = state_for(x, x->state()); | |
1979 | |
1980 #ifndef PRODUCT | |
1981 if (PrintC1Statistics) { | |
1783 | 1982 increment_counter(Runtime1::throw_count_address(), T_INT); |
0 | 1983 } |
1984 #endif | |
1985 | |
1986 // check if the instruction has an xhandler in any of the nested scopes | |
1987 bool unwind = false; | |
1988 if (info->exception_handlers()->length() == 0) { | |
1989 // this throw is not inside an xhandler | |
1990 unwind = true; | |
1991 } else { | |
1992 // get some idea of the throw type | |
1993 bool type_is_exact = true; | |
1994 ciType* throw_type = x->exception()->exact_type(); | |
1995 if (throw_type == NULL) { | |
1996 type_is_exact = false; | |
1997 throw_type = x->exception()->declared_type(); | |
1998 } | |
1999 if (throw_type != NULL && throw_type->is_instance_klass()) { | |
2000 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type; | |
2001 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact); | |
2002 } | |
2003 } | |
2004 | |
2005 // do null check before moving exception oop into fixed register | |
2006 // to avoid a fixed interval with an oop during the null check. | |
2007 // Use a copy of the CodeEmitInfo because debug information is | |
2008 // different for null_check and throw. | |
2009 if (GenerateCompilerNullChecks && | |
2010 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) { | |
2011 // if the exception object wasn't created using new then it might be null. | |
1819 | 2012 __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci()))); |
0 | 2013 } |
2014 | |
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2015 if (compilation()->env()->jvmti_can_post_on_exceptions()) { |
0 | 2016 // we need to go through the exception lookup path to get JVMTI |
2017 // notification done | |
2018 unwind = false; | |
2019 } | |
2020 | |
2021 // move exception oop into fixed register | |
2022 __ move(exception_opr, exceptionOopOpr()); | |
2023 | |
2024 if (unwind) { | |
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2025 __ unwind_exception(exceptionOopOpr()); |
0 | 2026 } else { |
2027 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info); | |
2028 } | |
2029 } | |
2030 | |
2031 | |
2032 void LIRGenerator::do_RoundFP(RoundFP* x) { | |
2033 LIRItem input(x->input(), this); | |
2034 input.load_item(); | |
2035 LIR_Opr input_opr = input.result(); | |
2036 assert(input_opr->is_register(), "why round if value is not in a register?"); | |
2037 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value"); | |
2038 if (input_opr->is_single_fpu()) { | |
2039 set_result(x, round_item(input_opr)); // This code path not currently taken | |
2040 } else { | |
2041 LIR_Opr result = new_register(T_DOUBLE); | |
2042 set_vreg_flag(result, must_start_in_memory); | |
2043 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result); | |
2044 set_result(x, result); | |
2045 } | |
2046 } | |
2047 | |
2048 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) { | |
2049 LIRItem base(x->base(), this); | |
2050 LIRItem idx(this); | |
2051 | |
2052 base.load_item(); | |
2053 if (x->has_index()) { | |
2054 idx.set_instruction(x->index()); | |
2055 idx.load_nonconstant(); | |
2056 } | |
2057 | |
2058 LIR_Opr reg = rlock_result(x, x->basic_type()); | |
2059 | |
2060 int log2_scale = 0; | |
2061 if (x->has_index()) { | |
2062 assert(x->index()->type()->tag() == intTag, "should not find non-int index"); | |
2063 log2_scale = x->log2_scale(); | |
2064 } | |
2065 | |
2066 assert(!x->has_index() || idx.value() == x->index(), "should match"); | |
2067 | |
2068 LIR_Opr base_op = base.result(); | |
2069 #ifndef _LP64 | |
2070 if (x->base()->type()->tag() == longTag) { | |
2071 base_op = new_register(T_INT); | |
2072 __ convert(Bytecodes::_l2i, base.result(), base_op); | |
2073 } else { | |
2074 assert(x->base()->type()->tag() == intTag, "must be"); | |
2075 } | |
2076 #endif | |
2077 | |
2078 BasicType dst_type = x->basic_type(); | |
2079 LIR_Opr index_op = idx.result(); | |
2080 | |
2081 LIR_Address* addr; | |
2082 if (index_op->is_constant()) { | |
2083 assert(log2_scale == 0, "must not have a scale"); | |
2084 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type); | |
2085 } else { | |
304 | 2086 #ifdef X86 |
1060 | 2087 #ifdef _LP64 |
2088 if (!index_op->is_illegal() && index_op->type() == T_INT) { | |
2089 LIR_Opr tmp = new_pointer_register(); | |
2090 __ convert(Bytecodes::_i2l, index_op, tmp); | |
2091 index_op = tmp; | |
2092 } | |
2093 #endif | |
0 | 2094 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type); |
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2095 #elif defined(ARM) |
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2096 addr = generate_address(base_op, index_op, log2_scale, 0, dst_type); |
0 | 2097 #else |
2098 if (index_op->is_illegal() || log2_scale == 0) { | |
1060 | 2099 #ifdef _LP64 |
2100 if (!index_op->is_illegal() && index_op->type() == T_INT) { | |
2101 LIR_Opr tmp = new_pointer_register(); | |
2102 __ convert(Bytecodes::_i2l, index_op, tmp); | |
2103 index_op = tmp; | |
2104 } | |
2105 #endif | |
0 | 2106 addr = new LIR_Address(base_op, index_op, dst_type); |
2107 } else { | |
1060 | 2108 LIR_Opr tmp = new_pointer_register(); |
0 | 2109 __ shift_left(index_op, log2_scale, tmp); |
2110 addr = new LIR_Address(base_op, tmp, dst_type); | |
2111 } | |
2112 #endif | |
2113 } | |
2114 | |
2115 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) { | |
2116 __ unaligned_move(addr, reg); | |
2117 } else { | |
2002 | 2118 if (dst_type == T_OBJECT && x->is_wide()) { |
2119 __ move_wide(addr, reg); | |
2120 } else { | |
2121 __ move(addr, reg); | |
2122 } | |
0 | 2123 } |
2124 } | |
2125 | |
2126 | |
2127 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) { | |
2128 int log2_scale = 0; | |
2129 BasicType type = x->basic_type(); | |
2130 | |
2131 if (x->has_index()) { | |
2132 assert(x->index()->type()->tag() == intTag, "should not find non-int index"); | |
2133 log2_scale = x->log2_scale(); | |
2134 } | |
2135 | |
2136 LIRItem base(x->base(), this); | |
2137 LIRItem value(x->value(), this); | |
2138 LIRItem idx(this); | |
2139 | |
2140 base.load_item(); | |
2141 if (x->has_index()) { | |
2142 idx.set_instruction(x->index()); | |
2143 idx.load_item(); | |
2144 } | |
2145 | |
2146 if (type == T_BYTE || type == T_BOOLEAN) { | |
2147 value.load_byte_item(); | |
2148 } else { | |
2149 value.load_item(); | |
2150 } | |
2151 | |
2152 set_no_result(x); | |
2153 | |
2154 LIR_Opr base_op = base.result(); | |
2155 #ifndef _LP64 | |
2156 if (x->base()->type()->tag() == longTag) { | |
2157 base_op = new_register(T_INT); | |
2158 __ convert(Bytecodes::_l2i, base.result(), base_op); | |
2159 } else { | |
2160 assert(x->base()->type()->tag() == intTag, "must be"); | |
2161 } | |
2162 #endif | |
2163 | |
2164 LIR_Opr index_op = idx.result(); | |
2165 if (log2_scale != 0) { | |
2166 // temporary fix (platform dependent code without shift on Intel would be better) | |
1060 | 2167 index_op = new_pointer_register(); |
2168 #ifdef _LP64 | |
2169 if(idx.result()->type() == T_INT) { | |
2170 __ convert(Bytecodes::_i2l, idx.result(), index_op); | |
2171 } else { | |
2172 #endif | |
1681
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2173 // TODO: ARM also allows embedded shift in the address |
1060 | 2174 __ move(idx.result(), index_op); |
2175 #ifdef _LP64 | |
2176 } | |
2177 #endif | |
0 | 2178 __ shift_left(index_op, log2_scale, index_op); |
2179 } | |
1060 | 2180 #ifdef _LP64 |
2181 else if(!index_op->is_illegal() && index_op->type() == T_INT) { | |
2182 LIR_Opr tmp = new_pointer_register(); | |
2183 __ convert(Bytecodes::_i2l, index_op, tmp); | |
2184 index_op = tmp; | |
2185 } | |
2186 #endif | |
0 | 2187 |
2188 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type()); | |
2189 __ move(value.result(), addr); | |
2190 } | |
2191 | |
2192 | |
2193 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) { | |
2194 BasicType type = x->basic_type(); | |
2195 LIRItem src(x->object(), this); | |
2196 LIRItem off(x->offset(), this); | |
2197 | |
2198 off.load_item(); | |
2199 src.load_item(); | |
2200 | |
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2201 LIR_Opr value = rlock_result(x, x->basic_type()); |
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2202 |
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2203 get_Object_unsafe(value, src.result(), off.result(), type, x->is_volatile()); |
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2204 |
8001
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2205 #if INCLUDE_ALL_GCS |
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2206 // We might be reading the value of the referent field of a |
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2207 // Reference object in order to attach it back to the live |
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2208 // object graph. If G1 is enabled then we need to record |
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2209 // the value that is being returned in an SATB log buffer. |
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|
2210 // |
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2211 // We need to generate code similar to the following... |
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2212 // |
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2213 // if (offset == java_lang_ref_Reference::referent_offset) { |
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2214 // if (src != NULL) { |
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2215 // if (klass(src)->reference_type() != REF_NONE) { |
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2216 // pre_barrier(..., value, ...); |
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2217 // } |
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2218 // } |
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2219 // } |
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2220 |
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2221 if (UseG1GC && type == T_OBJECT) { |
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2222 bool gen_pre_barrier = true; // Assume we need to generate pre_barrier. |
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2223 bool gen_offset_check = true; // Assume we need to generate the offset guard. |
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2224 bool gen_source_check = true; // Assume we need to check the src object for null. |
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2225 bool gen_type_check = true; // Assume we need to check the reference_type. |
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2226 |
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2227 if (off.is_constant()) { |
3254
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2228 jlong off_con = (off.type()->is_int() ? |
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2229 (jlong) off.get_jint_constant() : |
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2230 off.get_jlong_constant()); |
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2231 |
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2232 |
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2233 if (off_con != (jlong) java_lang_ref_Reference::referent_offset) { |
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2234 // The constant offset is something other than referent_offset. |
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2235 // We can skip generating/checking the remaining guards and |
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2236 // skip generation of the code stub. |
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2237 gen_pre_barrier = false; |
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2238 } else { |
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2239 // The constant offset is the same as referent_offset - |
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2240 // we do not need to generate a runtime offset check. |
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|
2241 gen_offset_check = false; |
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|
2242 } |
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2243 } |
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2244 |
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2245 // We don't need to generate stub if the source object is an array |
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2246 if (gen_pre_barrier && src.type()->is_array()) { |
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2247 gen_pre_barrier = false; |
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2248 } |
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2249 |
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2250 if (gen_pre_barrier) { |
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2251 // We still need to continue with the checks. |
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2252 if (src.is_constant()) { |
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|
2253 ciObject* src_con = src.get_jobject_constant(); |
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|
2254 |
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|
2255 if (src_con->is_null_object()) { |
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2256 // The constant src object is null - We can skip |
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|
2257 // generating the code stub. |
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2258 gen_pre_barrier = false; |
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2259 } else { |
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|
2260 // Non-null constant source object. We still have to generate |
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2261 // the slow stub - but we don't need to generate the runtime |
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|
2262 // null object check. |
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|
2263 gen_source_check = false; |
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|
2264 } |
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|
2265 } |
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|
2266 } |
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2267 if (gen_pre_barrier && !PatchALot) { |
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2268 // Can the klass of object be statically determined to be |
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2269 // a sub-class of Reference? |
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2270 ciType* type = src.value()->declared_type(); |
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2271 if ((type != NULL) && type->is_loaded()) { |
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2272 if (type->is_subtype_of(compilation()->env()->Reference_klass())) { |
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2273 gen_type_check = false; |
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2274 } else if (type->is_klass() && |
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2275 !compilation()->env()->Object_klass()->is_subtype_of(type->as_klass())) { |
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2276 // Not Reference and not Object klass. |
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2277 gen_pre_barrier = false; |
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2278 } |
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2279 } |
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2280 } |
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|
2281 |
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2282 if (gen_pre_barrier) { |
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|
2283 LabelObj* Lcont = new LabelObj(); |
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2284 |
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|
2285 // We can have generate one runtime check here. Let's start with |
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2286 // the offset check. |
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2287 if (gen_offset_check) { |
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2288 // if (offset != referent_offset) -> continue |
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2289 // If offset is an int then we can do the comparison with the |
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2290 // referent_offset constant; otherwise we need to move |
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2291 // referent_offset into a temporary register and generate |
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|
2292 // a reg-reg compare. |
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|
2293 |
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|
2294 LIR_Opr referent_off; |
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|
2295 |
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2296 if (off.type()->is_int()) { |
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2297 referent_off = LIR_OprFact::intConst(java_lang_ref_Reference::referent_offset); |
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2298 } else { |
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|
2299 assert(off.type()->is_long(), "what else?"); |
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|
2300 referent_off = new_register(T_LONG); |
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3249
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|
2301 __ move(LIR_OprFact::longConst(java_lang_ref_Reference::referent_offset), referent_off); |
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|
2302 } |
6615
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6266
diff
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|
2303 __ cmp(lir_cond_notEqual, off.result(), referent_off); |
09aad8452938
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6266
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|
2304 __ branch(lir_cond_notEqual, as_BasicType(off.type()), Lcont->label()); |
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6266
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|
2305 } |
09aad8452938
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6266
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|
2306 if (gen_source_check) { |
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6266
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|
2307 // offset is a const and equals referent offset |
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7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
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6266
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|
2308 // if (source == null) -> continue |
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7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
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6266
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|
2309 __ cmp(lir_cond_equal, src.result(), LIR_OprFact::oopConst(NULL)); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
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6266
diff
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|
2310 __ branch(lir_cond_equal, T_OBJECT, Lcont->label()); |
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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2357
diff
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|
2311 } |
6615
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2312 LIR_Opr src_klass = new_register(T_OBJECT); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2313 if (gen_type_check) { |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2314 // We have determined that offset == referent_offset && src != null. |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
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6266
diff
changeset
|
2315 // if (src->_klass->_reference_type == REF_NONE) -> continue |
6731 | 2316 __ move(new LIR_Address(src.result(), oopDesc::klass_offset_in_bytes(), UseCompressedKlassPointers ? T_OBJECT : T_ADDRESS), src_klass); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6616
diff
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|
2317 LIR_Address* reference_type_addr = new LIR_Address(src_klass, in_bytes(InstanceKlass::reference_type_offset()), T_BYTE); |
6615
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
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6266
diff
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|
2318 LIR_Opr reference_type = new_register(T_INT); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2319 __ move(reference_type_addr, reference_type); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2320 __ cmp(lir_cond_equal, reference_type, LIR_OprFact::intConst(REF_NONE)); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2321 __ branch(lir_cond_equal, T_INT, Lcont->label()); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2322 } |
09aad8452938
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kvn
parents:
6266
diff
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|
2323 { |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2324 // We have determined that src->_klass->_reference_type != REF_NONE |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2325 // so register the value in the referent field with the pre-barrier. |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2326 pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2327 value /* pre_val */, |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2328 false /* do_load */, |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2329 false /* patch */, |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2330 NULL /* info */); |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
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|
2331 } |
09aad8452938
7190310: Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
kvn
parents:
6266
diff
changeset
|
2332 __ branch_destination(Lcont->label()); |
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
2333 } |
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
2334 } |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7425
diff
changeset
|
2335 #endif // INCLUDE_ALL_GCS |
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
2336 |
0 | 2337 if (x->is_volatile() && os::is_MP()) __ membar_acquire(); |
2338 } | |
2339 | |
2340 | |
2341 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) { | |
2342 BasicType type = x->basic_type(); | |
2343 LIRItem src(x->object(), this); | |
2344 LIRItem off(x->offset(), this); | |
2345 LIRItem data(x->value(), this); | |
2346 | |
2347 src.load_item(); | |
2348 if (type == T_BOOLEAN || type == T_BYTE) { | |
2349 data.load_byte_item(); | |
2350 } else { | |
2351 data.load_item(); | |
2352 } | |
2353 off.load_item(); | |
2354 | |
2355 set_no_result(x); | |
2356 | |
2357 if (x->is_volatile() && os::is_MP()) __ membar_release(); | |
2358 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile()); | |
2123
df307487d610
7010665: Misplaced membar in C1 implementation of Unsafe.get/putXXX
dholmes
parents:
2007
diff
changeset
|
2359 if (x->is_volatile() && os::is_MP()) __ membar(); |
0 | 2360 } |
2361 | |
2362 | |
2363 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) { | |
2364 LIRItem src(x->object(), this); | |
2365 LIRItem off(x->offset(), this); | |
2366 | |
2367 src.load_item(); | |
2368 if (off.is_constant() && can_inline_as_constant(x->offset())) { | |
2369 // let it be a constant | |
2370 off.dont_load_item(); | |
2371 } else { | |
2372 off.load_item(); | |
2373 } | |
2374 | |
2375 set_no_result(x); | |
2376 | |
2377 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE); | |
2378 __ prefetch(addr, is_store); | |
2379 } | |
2380 | |
2381 | |
2382 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) { | |
2383 do_UnsafePrefetch(x, false); | |
2384 } | |
2385 | |
2386 | |
2387 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) { | |
2388 do_UnsafePrefetch(x, true); | |
2389 } | |
2390 | |
2391 | |
2392 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) { | |
2393 int lng = x->length(); | |
2394 | |
2395 for (int i = 0; i < lng; i++) { | |
2396 SwitchRange* one_range = x->at(i); | |
2397 int low_key = one_range->low_key(); | |
2398 int high_key = one_range->high_key(); | |
2399 BlockBegin* dest = one_range->sux(); | |
2400 if (low_key == high_key) { | |
2401 __ cmp(lir_cond_equal, value, low_key); | |
2402 __ branch(lir_cond_equal, T_INT, dest); | |
2403 } else if (high_key - low_key == 1) { | |
2404 __ cmp(lir_cond_equal, value, low_key); | |
2405 __ branch(lir_cond_equal, T_INT, dest); | |
2406 __ cmp(lir_cond_equal, value, high_key); | |
2407 __ branch(lir_cond_equal, T_INT, dest); | |
2408 } else { | |
2409 LabelObj* L = new LabelObj(); | |
2410 __ cmp(lir_cond_less, value, low_key); | |
4816 | 2411 __ branch(lir_cond_less, T_INT, L->label()); |
0 | 2412 __ cmp(lir_cond_lessEqual, value, high_key); |
2413 __ branch(lir_cond_lessEqual, T_INT, dest); | |
2414 __ branch_destination(L->label()); | |
2415 } | |
2416 } | |
2417 __ jump(default_sux); | |
2418 } | |
2419 | |
2420 | |
2421 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) { | |
2422 SwitchRangeList* res = new SwitchRangeList(); | |
2423 int len = x->length(); | |
2424 if (len > 0) { | |
2425 BlockBegin* sux = x->sux_at(0); | |
2426 int key = x->lo_key(); | |
2427 BlockBegin* default_sux = x->default_sux(); | |
2428 SwitchRange* range = new SwitchRange(key, sux); | |
2429 for (int i = 0; i < len; i++, key++) { | |
2430 BlockBegin* new_sux = x->sux_at(i); | |
2431 if (sux == new_sux) { | |
2432 // still in same range | |
2433 range->set_high_key(key); | |
2434 } else { | |
2435 // skip tests which explicitly dispatch to the default | |
2436 if (sux != default_sux) { | |
2437 res->append(range); | |
2438 } | |
2439 range = new SwitchRange(key, new_sux); | |
2440 } | |
2441 sux = new_sux; | |
2442 } | |
2443 if (res->length() == 0 || res->last() != range) res->append(range); | |
2444 } | |
2445 return res; | |
2446 } | |
2447 | |
2448 | |
2449 // we expect the keys to be sorted by increasing value | |
2450 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) { | |
2451 SwitchRangeList* res = new SwitchRangeList(); | |
2452 int len = x->length(); | |
2453 if (len > 0) { | |
2454 BlockBegin* default_sux = x->default_sux(); | |
2455 int key = x->key_at(0); | |
2456 BlockBegin* sux = x->sux_at(0); | |
2457 SwitchRange* range = new SwitchRange(key, sux); | |
2458 for (int i = 1; i < len; i++) { | |
2459 int new_key = x->key_at(i); | |
2460 BlockBegin* new_sux = x->sux_at(i); | |
2461 if (key+1 == new_key && sux == new_sux) { | |
2462 // still in same range | |
2463 range->set_high_key(new_key); | |
2464 } else { | |
2465 // skip tests which explicitly dispatch to the default | |
2466 if (range->sux() != default_sux) { | |
2467 res->append(range); | |
2468 } | |
2469 range = new SwitchRange(new_key, new_sux); | |
2470 } | |
2471 key = new_key; | |
2472 sux = new_sux; | |
2473 } | |
2474 if (res->length() == 0 || res->last() != range) res->append(range); | |
2475 } | |
2476 return res; | |
2477 } | |
2478 | |
2479 | |
2480 void LIRGenerator::do_TableSwitch(TableSwitch* x) { | |
2481 LIRItem tag(x->tag(), this); | |
2482 tag.load_item(); | |
2483 set_no_result(x); | |
2484 | |
2485 if (x->is_safepoint()) { | |
2486 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); | |
2487 } | |
2488 | |
2489 // move values into phi locations | |
2490 move_to_phi(x->state()); | |
2491 | |
2492 int lo_key = x->lo_key(); | |
2493 int hi_key = x->hi_key(); | |
2494 int len = x->length(); | |
2495 LIR_Opr value = tag.result(); | |
2496 if (UseTableRanges) { | |
2497 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); | |
2498 } else { | |
2499 for (int i = 0; i < len; i++) { | |
2500 __ cmp(lir_cond_equal, value, i + lo_key); | |
2501 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); | |
2502 } | |
2503 __ jump(x->default_sux()); | |
2504 } | |
2505 } | |
2506 | |
2507 | |
2508 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) { | |
2509 LIRItem tag(x->tag(), this); | |
2510 tag.load_item(); | |
2511 set_no_result(x); | |
2512 | |
2513 if (x->is_safepoint()) { | |
2514 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); | |
2515 } | |
2516 | |
2517 // move values into phi locations | |
2518 move_to_phi(x->state()); | |
2519 | |
2520 LIR_Opr value = tag.result(); | |
2521 if (UseTableRanges) { | |
2522 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); | |
2523 } else { | |
2524 int len = x->length(); | |
2525 for (int i = 0; i < len; i++) { | |
2526 __ cmp(lir_cond_equal, value, x->key_at(i)); | |
2527 __ branch(lir_cond_equal, T_INT, x->sux_at(i)); | |
2528 } | |
2529 __ jump(x->default_sux()); | |
2530 } | |
2531 } | |
2532 | |
2533 | |
2534 void LIRGenerator::do_Goto(Goto* x) { | |
2535 set_no_result(x); | |
2536 | |
2537 if (block()->next()->as_OsrEntry()) { | |
2538 // need to free up storage used for OSR entry point | |
2539 LIR_Opr osrBuffer = block()->next()->operand(); | |
2540 BasicTypeList signature; | |
2541 signature.append(T_INT); | |
2542 CallingConvention* cc = frame_map()->c_calling_convention(&signature); | |
2543 __ move(osrBuffer, cc->args()->at(0)); | |
2544 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end), | |
2545 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args()); | |
2546 } | |
2547 | |
2548 if (x->is_safepoint()) { | |
2549 ValueStack* state = x->state_before() ? x->state_before() : x->state(); | |
2550 | |
2551 // increment backedge counter if needed | |
1783 | 2552 CodeEmitInfo* info = state_for(x, state); |
3997
940513efe83a
7097679: Tiered: events with bad bci to Gotos reduced from Ifs
iveresov
parents:
3964
diff
changeset
|
2553 increment_backedge_counter(info, x->profiled_bci()); |
0 | 2554 CodeEmitInfo* safepoint_info = state_for(x, state); |
2555 __ safepoint(safepoint_poll_register(), safepoint_info); | |
2556 } | |
2557 | |
1783 | 2558 // Gotos can be folded Ifs, handle this case. |
2559 if (x->should_profile()) { | |
2560 ciMethod* method = x->profiled_method(); | |
2561 assert(method != NULL, "method should be set if branch is profiled"); | |
2007
5ddfcf4b079e
7003554: (tiered) assert(is_null_object() || handle() != NULL) failed: cannot embed null pointer
iveresov
parents:
2002
diff
changeset
|
2562 ciMethodData* md = method->method_data_or_null(); |
5ddfcf4b079e
7003554: (tiered) assert(is_null_object() || handle() != NULL) failed: cannot embed null pointer
iveresov
parents:
2002
diff
changeset
|
2563 assert(md != NULL, "Sanity"); |
1783 | 2564 ciProfileData* data = md->bci_to_data(x->profiled_bci()); |
2565 assert(data != NULL, "must have profiling data"); | |
2566 int offset; | |
2567 if (x->direction() == Goto::taken) { | |
2568 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
2569 offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); | |
2570 } else if (x->direction() == Goto::not_taken) { | |
2571 assert(data->is_BranchData(), "need BranchData for two-way branches"); | |
2572 offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); | |
2573 } else { | |
2574 assert(data->is_JumpData(), "need JumpData for branches"); | |
2575 offset = md->byte_offset_of_slot(data, JumpData::taken_offset()); | |
2576 } | |
6739
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
2577 LIR_Opr md_reg = new_register(T_METADATA); |
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
2578 __ metadata2reg(md->constant_encoding(), md_reg); |
1783 | 2579 |
2580 increment_counter(new LIR_Address(md_reg, offset, | |
2581 NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment); | |
2582 } | |
2583 | |
0 | 2584 // emit phi-instruction move after safepoint since this simplifies |
2585 // describing the state as the safepoint. | |
2586 move_to_phi(x->state()); | |
2587 | |
2588 __ jump(x->default_sux()); | |
2589 } | |
2590 | |
2591 | |
2592 void LIRGenerator::do_Base(Base* x) { | |
2593 __ std_entry(LIR_OprFact::illegalOpr); | |
2594 // Emit moves from physical registers / stack slots to virtual registers | |
2595 CallingConvention* args = compilation()->frame_map()->incoming_arguments(); | |
2596 IRScope* irScope = compilation()->hir()->top_scope(); | |
2597 int java_index = 0; | |
2598 for (int i = 0; i < args->length(); i++) { | |
2599 LIR_Opr src = args->at(i); | |
2600 assert(!src->is_illegal(), "check"); | |
2601 BasicType t = src->type(); | |
2602 | |
2603 // Types which are smaller than int are passed as int, so | |
2604 // correct the type which passed. | |
2605 switch (t) { | |
2606 case T_BYTE: | |
2607 case T_BOOLEAN: | |
2608 case T_SHORT: | |
2609 case T_CHAR: | |
2610 t = T_INT; | |
2611 break; | |
2612 } | |
2613 | |
2614 LIR_Opr dest = new_register(t); | |
2615 __ move(src, dest); | |
2616 | |
2617 // Assign new location to Local instruction for this local | |
2618 Local* local = x->state()->local_at(java_index)->as_Local(); | |
2619 assert(local != NULL, "Locals for incoming arguments must have been created"); | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1584
diff
changeset
|
2620 #ifndef __SOFTFP__ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1584
diff
changeset
|
2621 // The java calling convention passes double as long and float as int. |
0 | 2622 assert(as_ValueType(t)->tag() == local->type()->tag(), "check"); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1584
diff
changeset
|
2623 #endif // __SOFTFP__ |
0 | 2624 local->set_operand(dest); |
2625 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL); | |
2626 java_index += type2size[t]; | |
2627 } | |
2628 | |
780
c96bf21b756f
6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents:
579
diff
changeset
|
2629 if (compilation()->env()->dtrace_method_probes()) { |
0 | 2630 BasicTypeList signature; |
2002 | 2631 signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6616
diff
changeset
|
2632 signature.append(T_OBJECT); // Method* |
0 | 2633 LIR_OprList* args = new LIR_OprList(); |
2634 args->append(getThreadPointer()); | |
6739
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2635 LIR_Opr meth = new_register(T_METADATA); |
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2636 __ metadata2reg(method()->constant_encoding(), meth); |
0 | 2637 args->append(meth); |
2638 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL); | |
2639 } | |
2640 | |
2641 if (method()->is_synchronized()) { | |
2642 LIR_Opr obj; | |
2643 if (method()->is_static()) { | |
2644 obj = new_register(T_OBJECT); | |
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2645 __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj); |
0 | 2646 } else { |
2647 Local* receiver = x->state()->local_at(0)->as_Local(); | |
2648 assert(receiver != NULL, "must already exist"); | |
2649 obj = receiver->operand(); | |
2650 } | |
2651 assert(obj->is_valid(), "must be valid"); | |
2652 | |
2653 if (method()->is_synchronized() && GenerateSynchronizationCode) { | |
2654 LIR_Opr lock = new_register(T_INT); | |
2655 __ load_stack_address_monitor(0, lock); | |
2656 | |
8860 | 2657 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException)); |
0 | 2658 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info); |
2659 | |
2660 // receiver is guaranteed non-NULL so don't need CodeEmitInfo | |
2661 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL); | |
2662 } | |
2663 } | |
2664 | |
2665 // increment invocation counters if needed | |
1783 | 2666 if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting. |
8860 | 2667 CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false); |
1783 | 2668 increment_invocation_counter(info); |
2669 } | |
0 | 2670 |
2671 // all blocks with a successor must end with an unconditional jump | |
2672 // to the successor even if they are consecutive | |
2673 __ jump(x->default_sux()); | |
2674 } | |
2675 | |
2676 | |
2677 void LIRGenerator::do_OsrEntry(OsrEntry* x) { | |
2678 // construct our frame and model the production of incoming pointer | |
2679 // to the OSR buffer. | |
2680 __ osr_entry(LIR_Assembler::osrBufferPointer()); | |
2681 LIR_Opr result = rlock_result(x); | |
2682 __ move(LIR_Assembler::osrBufferPointer(), result); | |
2683 } | |
2684 | |
2685 | |
2686 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) { | |
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2687 assert(args->length() == arg_list->length(), |
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2688 err_msg_res("args=%d, arg_list=%d", args->length(), arg_list->length())); |
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2689 for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) { |
0 | 2690 LIRItem* param = args->at(i); |
2691 LIR_Opr loc = arg_list->at(i); | |
2692 if (loc->is_register()) { | |
2693 param->load_item_force(loc); | |
2694 } else { | |
2695 LIR_Address* addr = loc->as_address_ptr(); | |
2696 param->load_for_store(addr->type()); | |
2002 | 2697 if (addr->type() == T_OBJECT) { |
2698 __ move_wide(param->result(), addr); | |
2699 } else | |
2700 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
2701 __ unaligned_move(param->result(), addr); | |
2702 } else { | |
2703 __ move(param->result(), addr); | |
2704 } | |
0 | 2705 } |
2706 } | |
2707 | |
2708 if (x->has_receiver()) { | |
2709 LIRItem* receiver = args->at(0); | |
2710 LIR_Opr loc = arg_list->at(0); | |
2711 if (loc->is_register()) { | |
2712 receiver->load_item_force(loc); | |
2713 } else { | |
2714 assert(loc->is_address(), "just checking"); | |
2715 receiver->load_for_store(T_OBJECT); | |
2002 | 2716 __ move_wide(receiver->result(), loc->as_address_ptr()); |
0 | 2717 } |
2718 } | |
2719 } | |
2720 | |
2721 | |
2722 // Visits all arguments, returns appropriate items without loading them | |
2723 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) { | |
2724 LIRItemList* argument_items = new LIRItemList(); | |
2725 if (x->has_receiver()) { | |
2726 LIRItem* receiver = new LIRItem(x->receiver(), this); | |
2727 argument_items->append(receiver); | |
2728 } | |
2729 for (int i = 0; i < x->number_of_arguments(); i++) { | |
2730 LIRItem* param = new LIRItem(x->argument_at(i), this); | |
2731 argument_items->append(param); | |
2732 } | |
2733 return argument_items; | |
2734 } | |
2735 | |
2736 | |
2737 // The invoke with receiver has following phases: | |
2738 // a) traverse and load/lock receiver; | |
2739 // b) traverse all arguments -> item-array (invoke_visit_argument) | |
2740 // c) push receiver on stack | |
2741 // d) load each of the items and push on stack | |
2742 // e) unlock receiver | |
2743 // f) move receiver into receiver-register %o0 | |
2744 // g) lock result registers and emit call operation | |
2745 // | |
2746 // Before issuing a call, we must spill-save all values on stack | |
2747 // that are in caller-save register. "spill-save" moves thos registers | |
2748 // either in a free callee-save register or spills them if no free | |
2749 // callee save register is available. | |
2750 // | |
2751 // The problem is where to invoke spill-save. | |
2752 // - if invoked between e) and f), we may lock callee save | |
2753 // register in "spill-save" that destroys the receiver register | |
2754 // before f) is executed | |
2755 // - if we rearange the f) to be earlier, by loading %o0, it | |
2756 // may destroy a value on the stack that is currently in %o0 | |
2757 // and is waiting to be spilled | |
2758 // - if we keep the receiver locked while doing spill-save, | |
2759 // we cannot spill it as it is spill-locked | |
2760 // | |
2761 void LIRGenerator::do_Invoke(Invoke* x) { | |
2762 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true); | |
2763 | |
2764 LIR_OprList* arg_list = cc->args(); | |
2765 LIRItemList* args = invoke_visit_arguments(x); | |
2766 LIR_Opr receiver = LIR_OprFact::illegalOpr; | |
2767 | |
2768 // setup result register | |
2769 LIR_Opr result_register = LIR_OprFact::illegalOpr; | |
2770 if (x->type() != voidType) { | |
2771 result_register = result_register_for(x->type()); | |
2772 } | |
2773 | |
2774 CodeEmitInfo* info = state_for(x, x->state()); | |
2775 | |
2776 invoke_load_arguments(x, args, arg_list); | |
2777 | |
2778 if (x->has_receiver()) { | |
2779 args->at(0)->load_item_force(LIR_Assembler::receiverOpr()); | |
2780 receiver = args->at(0)->result(); | |
2781 } | |
2782 | |
2783 // emit invoke code | |
2784 bool optimized = x->target_is_loaded() && x->target_is_final(); | |
2785 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match"); | |
2786 | |
1564 | 2787 // JSR 292 |
2788 // Preserve the SP over MethodHandle call sites. | |
2789 ciMethod* target = x->target(); | |
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2790 bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant? |
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|
2791 target->is_method_handle_intrinsic() || |
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|
2792 target->is_compiled_lambda_form()); |
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|
2793 if (is_method_handle_invoke) { |
1564 | 2794 info->set_is_method_handle_invoke(true); |
2795 __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr()); | |
2796 } | |
2797 | |
0 | 2798 switch (x->code()) { |
2799 case Bytecodes::_invokestatic: | |
1564 | 2800 __ call_static(target, result_register, |
0 | 2801 SharedRuntime::get_resolve_static_call_stub(), |
2802 arg_list, info); | |
2803 break; | |
2804 case Bytecodes::_invokespecial: | |
2805 case Bytecodes::_invokevirtual: | |
2806 case Bytecodes::_invokeinterface: | |
2807 // for final target we still produce an inline cache, in order | |
2808 // to be able to call mixed mode | |
2809 if (x->code() == Bytecodes::_invokespecial || optimized) { | |
1564 | 2810 __ call_opt_virtual(target, receiver, result_register, |
0 | 2811 SharedRuntime::get_resolve_opt_virtual_call_stub(), |
2812 arg_list, info); | |
2813 } else if (x->vtable_index() < 0) { | |
1564 | 2814 __ call_icvirtual(target, receiver, result_register, |
0 | 2815 SharedRuntime::get_resolve_virtual_call_stub(), |
2816 arg_list, info); | |
2817 } else { | |
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2818 int entry_offset = InstanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size(); |
0 | 2819 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes(); |
1564 | 2820 __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info); |
0 | 2821 } |
2822 break; | |
1295 | 2823 case Bytecodes::_invokedynamic: { |
1564 | 2824 __ call_dynamic(target, receiver, result_register, |
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|
2825 SharedRuntime::get_resolve_static_call_stub(), |
1295 | 2826 arg_list, info); |
2827 break; | |
2828 } | |
0 | 2829 default: |
6145
e2fe93124108
7174928: JSR 292: unresolved invokedynamic call sites deopt and osr infinitely
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6143
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|
2830 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(x->code()))); |
0 | 2831 break; |
2832 } | |
2833 | |
1564 | 2834 // JSR 292 |
2835 // Restore the SP after MethodHandle call sites. | |
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2836 if (is_method_handle_invoke) { |
1564 | 2837 __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer()); |
2838 } | |
2839 | |
0 | 2840 if (x->type()->is_float() || x->type()->is_double()) { |
2841 // Force rounding of results from non-strictfp when in strictfp | |
2842 // scope (or when we don't know the strictness of the callee, to | |
2843 // be safe.) | |
2844 if (method()->is_strict()) { | |
2845 if (!x->target_is_loaded() || !x->target_is_strictfp()) { | |
2846 result_register = round_item(result_register); | |
2847 } | |
2848 } | |
2849 } | |
2850 | |
2851 if (result_register->is_valid()) { | |
2852 LIR_Opr result = rlock_result(x); | |
2853 __ move(result_register, result); | |
2854 } | |
2855 } | |
2856 | |
2857 | |
2858 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) { | |
2859 assert(x->number_of_arguments() == 1, "wrong type"); | |
2860 LIRItem value (x->argument_at(0), this); | |
2861 LIR_Opr reg = rlock_result(x); | |
2862 value.load_item(); | |
2863 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type())); | |
2864 __ move(tmp, reg); | |
2865 } | |
2866 | |
2867 | |
2868 | |
2869 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval() | |
2870 void LIRGenerator::do_IfOp(IfOp* x) { | |
2871 #ifdef ASSERT | |
2872 { | |
2873 ValueTag xtag = x->x()->type()->tag(); | |
2874 ValueTag ttag = x->tval()->type()->tag(); | |
2875 assert(xtag == intTag || xtag == objectTag, "cannot handle others"); | |
2876 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others"); | |
2877 assert(ttag == x->fval()->type()->tag(), "cannot handle others"); | |
2878 } | |
2879 #endif | |
2880 | |
2881 LIRItem left(x->x(), this); | |
2882 LIRItem right(x->y(), this); | |
2883 left.load_item(); | |
2884 if (can_inline_as_constant(right.value())) { | |
2885 right.dont_load_item(); | |
2886 } else { | |
2887 right.load_item(); | |
2888 } | |
2889 | |
2890 LIRItem t_val(x->tval(), this); | |
2891 LIRItem f_val(x->fval(), this); | |
2892 t_val.dont_load_item(); | |
2893 f_val.dont_load_item(); | |
2894 LIR_Opr reg = rlock_result(x); | |
2895 | |
2896 __ cmp(lir_cond(x->cond()), left.result(), right.result()); | |
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2897 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type())); |
0 | 2898 } |
2899 | |
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2900 void LIRGenerator::do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x) { |
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2901 assert(x->number_of_arguments() == expected_arguments, "wrong type"); |
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|
2902 LIR_Opr reg = result_register_for(x->type()); |
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|
2903 __ call_runtime_leaf(routine, getThreadTemp(), |
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|
2904 reg, new LIR_OprList()); |
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|
2905 LIR_Opr result = rlock_result(x); |
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|
2906 __ move(reg, result); |
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|
2907 } |
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|
2908 |
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|
2909 #ifdef TRACE_HAVE_INTRINSICS |
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|
2910 void LIRGenerator::do_ThreadIDIntrinsic(Intrinsic* x) { |
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|
2911 LIR_Opr thread = getThreadPointer(); |
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|
2912 LIR_Opr osthread = new_pointer_register(); |
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2913 __ move(new LIR_Address(thread, in_bytes(JavaThread::osthread_offset()), osthread->type()), osthread); |
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|
2914 size_t thread_id_size = OSThread::thread_id_size(); |
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|
2915 if (thread_id_size == (size_t) BytesPerLong) { |
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|
2916 LIR_Opr id = new_register(T_LONG); |
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2917 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_LONG), id); |
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2918 __ convert(Bytecodes::_l2i, id, rlock_result(x)); |
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2919 } else if (thread_id_size == (size_t) BytesPerInt) { |
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2920 __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_INT), rlock_result(x)); |
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|
2921 } else { |
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|
2922 ShouldNotReachHere(); |
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|
2923 } |
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|
2924 } |
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|
2925 |
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2926 void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) { |
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2927 CodeEmitInfo* info = state_for(x); |
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|
2928 CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check |
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2929 BasicType klass_pointer_type = NOT_LP64(T_INT) LP64_ONLY(T_LONG); |
6006
0105f367a14c
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|
2930 assert(info != NULL, "must have info"); |
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2931 LIRItem arg(x->argument_at(1), this); |
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|
2932 arg.load_item(); |
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2933 LIR_Opr klass = new_pointer_register(); |
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2934 __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), klass_pointer_type), klass, info); |
6006
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2935 LIR_Opr id = new_register(T_LONG); |
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2936 ByteSize offset = TRACE_ID_OFFSET; |
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|
2937 LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG); |
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|
2938 __ move(trace_id_addr, id); |
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|
2939 __ logical_or(id, LIR_OprFact::longConst(0x01l), id); |
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2940 __ store(id, trace_id_addr); |
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2941 __ logical_and(id, LIR_OprFact::longConst(~0x3l), id); |
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|
2942 __ move(id, rlock_result(x)); |
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|
2943 } |
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|
2944 #endif |
0 | 2945 |
2946 void LIRGenerator::do_Intrinsic(Intrinsic* x) { | |
2947 switch (x->id()) { | |
2948 case vmIntrinsics::_intBitsToFloat : | |
2949 case vmIntrinsics::_doubleToRawLongBits : | |
2950 case vmIntrinsics::_longBitsToDouble : | |
2951 case vmIntrinsics::_floatToRawIntBits : { | |
2952 do_FPIntrinsics(x); | |
2953 break; | |
2954 } | |
2955 | |
6006
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2956 #ifdef TRACE_HAVE_INTRINSICS |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2957 case vmIntrinsics::_threadID: do_ThreadIDIntrinsic(x); break; |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2958 case vmIntrinsics::_classID: do_ClassIDIntrinsic(x); break; |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2959 case vmIntrinsics::_counterTime: |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2960 do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), 0, x); |
0 | 2961 break; |
6006
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2962 #endif |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2963 |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2964 case vmIntrinsics::_currentTimeMillis: |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2965 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), 0, x); |
0 | 2966 break; |
6006
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2967 |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2968 case vmIntrinsics::_nanoTime: |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2969 do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), 0, x); |
0105f367a14c
7160570: Intrinsification support for tracing framework
rbackman
parents:
4966
diff
changeset
|
2970 break; |
0 | 2971 |
2972 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break; | |
6135 | 2973 case vmIntrinsics::_isInstance: do_isInstance(x); break; |
0 | 2974 case vmIntrinsics::_getClass: do_getClass(x); break; |
2975 case vmIntrinsics::_currentThread: do_currentThread(x); break; | |
2976 | |
2977 case vmIntrinsics::_dlog: // fall through | |
2978 case vmIntrinsics::_dlog10: // fall through | |
2979 case vmIntrinsics::_dabs: // fall through | |
2980 case vmIntrinsics::_dsqrt: // fall through | |
2981 case vmIntrinsics::_dtan: // fall through | |
2982 case vmIntrinsics::_dsin : // fall through | |
6084
6759698e3140
7133857: exp() and pow() should use the x87 ISA on x86
roland
parents:
6006
diff
changeset
|
2983 case vmIntrinsics::_dcos : // fall through |
6759698e3140
7133857: exp() and pow() should use the x87 ISA on x86
roland
parents:
6006
diff
changeset
|
2984 case vmIntrinsics::_dexp : // fall through |
6759698e3140
7133857: exp() and pow() should use the x87 ISA on x86
roland
parents:
6006
diff
changeset
|
2985 case vmIntrinsics::_dpow : do_MathIntrinsic(x); break; |
0 | 2986 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break; |
2987 | |
2988 // java.nio.Buffer.checkIndex | |
2989 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break; | |
2990 | |
2991 case vmIntrinsics::_compareAndSwapObject: | |
2992 do_CompareAndSwap(x, objectType); | |
2993 break; | |
2994 case vmIntrinsics::_compareAndSwapInt: | |
2995 do_CompareAndSwap(x, intType); | |
2996 break; | |
2997 case vmIntrinsics::_compareAndSwapLong: | |
2998 do_CompareAndSwap(x, longType); | |
2999 break; | |
3000 | |
7425 | 3001 case vmIntrinsics::_loadFence : |
3002 if (os::is_MP()) __ membar_acquire(); | |
3003 break; | |
3004 case vmIntrinsics::_storeFence: | |
3005 if (os::is_MP()) __ membar_release(); | |
3006 break; | |
3007 case vmIntrinsics::_fullFence : | |
3008 if (os::is_MP()) __ membar(); | |
3009 break; | |
3010 | |
3249
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
3011 case vmIntrinsics::_Reference_get: |
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
3012 do_Reference_get(x); |
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
3013 break; |
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents:
2357
diff
changeset
|
3014 |
0 | 3015 default: ShouldNotReachHere(); break; |
3016 } | |
3017 } | |
3018 | |
3019 void LIRGenerator::do_ProfileCall(ProfileCall* x) { | |
3020 // Need recv in a temporary register so it interferes with the other temporaries | |
3021 LIR_Opr recv = LIR_OprFact::illegalOpr; | |
3022 LIR_Opr mdo = new_register(T_OBJECT); | |
1783 | 3023 // tmp is used to hold the counters on SPARC |
3024 LIR_Opr tmp = new_pointer_register(); | |
0 | 3025 if (x->recv() != NULL) { |
3026 LIRItem value(x->recv(), this); | |
3027 value.load_item(); | |
3028 recv = new_register(T_OBJECT); | |
3029 __ move(value.result(), recv); | |
3030 } | |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6145
diff
changeset
|
3031 __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder()); |
0 | 3032 } |
3033 | |
1783 | 3034 void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) { |
3035 // We can safely ignore accessors here, since c2 will inline them anyway, | |
3036 // accessors are also always mature. | |
3037 if (!x->inlinee()->is_accessor()) { | |
3038 CodeEmitInfo* info = state_for(x, x->state(), true); | |
3964
dc45ae774613
7096639: Tiered: Incorrect counter overflow handling for inlined methods
iveresov
parents:
3450
diff
changeset
|
3039 // Notify the runtime very infrequently only to take care of counter overflows |
dc45ae774613
7096639: Tiered: Incorrect counter overflow handling for inlined methods
iveresov
parents:
3450
diff
changeset
|
3040 increment_event_counter_impl(info, x->inlinee(), (1 << Tier23InlineeNotifyFreqLog) - 1, InvocationEntryBci, false, true); |
1783 | 3041 } |
3042 } | |
3043 | |
3044 void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) { | |
3045 int freq_log; | |
3046 int level = compilation()->env()->comp_level(); | |
3047 if (level == CompLevel_limited_profile) { | |
3048 freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog); | |
3049 } else if (level == CompLevel_full_profile) { | |
3050 freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog); | |
3051 } else { | |
3052 ShouldNotReachHere(); | |
3053 } | |
3054 // Increment the appropriate invocation/backedge counter and notify the runtime. | |
3055 increment_event_counter_impl(info, info->scope()->method(), (1 << freq_log) - 1, bci, backedge, true); | |
0 | 3056 } |
3057 | |
1783 | 3058 void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info, |
3059 ciMethod *method, int frequency, | |
3060 int bci, bool backedge, bool notify) { | |
3061 assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0"); | |
3062 int level = _compilation->env()->comp_level(); | |
3063 assert(level > CompLevel_simple, "Shouldn't be here"); | |
3064 | |
3065 int offset = -1; | |
6739
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
3066 LIR_Opr counter_holder = new_register(T_METADATA); |
1783 | 3067 LIR_Opr meth; |
3068 if (level == CompLevel_limited_profile) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6616
diff
changeset
|
3069 offset = in_bytes(backedge ? Method::backedge_counter_offset() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6616
diff
changeset
|
3070 Method::invocation_counter_offset()); |
6739
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
3071 __ metadata2reg(method->constant_encoding(), counter_holder); |
1783 | 3072 meth = counter_holder; |
3073 } else if (level == CompLevel_full_profile) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6616
diff
changeset
|
3074 offset = in_bytes(backedge ? MethodData::backedge_counter_offset() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6616
diff
changeset
|
3075 MethodData::invocation_counter_offset()); |
2007
5ddfcf4b079e
7003554: (tiered) assert(is_null_object() || handle() != NULL) failed: cannot embed null pointer
iveresov
parents:
2002
diff
changeset
|
3076 ciMethodData* md = method->method_data_or_null(); |
5ddfcf4b079e
7003554: (tiered) assert(is_null_object() || handle() != NULL) failed: cannot embed null pointer
iveresov
parents:
2002
diff
changeset
|
3077 assert(md != NULL, "Sanity"); |
6739
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
3078 __ metadata2reg(md->constant_encoding(), counter_holder); |
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
3079 meth = new_register(T_METADATA); |
8a02ca5e5576
7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
roland
parents:
6731
diff
changeset
|
3080 __ metadata2reg(method->constant_encoding(), meth); |
1783 | 3081 } else { |
3082 ShouldNotReachHere(); | |
3083 } | |
3084 LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT); | |
3085 LIR_Opr result = new_register(T_INT); | |
3086 __ load(counter, result); | |
3087 __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result); | |
3088 __ store(result, counter); | |
3089 if (notify) { | |
3090 LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT); | |
3091 __ logical_and(result, mask, result); | |
3092 __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0)); | |
3093 // The bci for info can point to cmp for if's we want the if bci | |
3094 CodeStub* overflow = new CounterOverflowStub(info, bci, meth); | |
3095 __ branch(lir_cond_equal, T_INT, overflow); | |
3096 __ branch_destination(overflow->continuation()); | |
3097 } | |
3098 } | |
0 | 3099 |
2166
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3100 void LIRGenerator::do_RuntimeCall(RuntimeCall* x) { |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3101 LIR_OprList* args = new LIR_OprList(x->number_of_arguments()); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3102 BasicTypeList* signature = new BasicTypeList(x->number_of_arguments()); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3103 |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3104 if (x->pass_thread()) { |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3105 signature->append(T_ADDRESS); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3106 args->append(getThreadPointer()); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3107 } |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3108 |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3109 for (int i = 0; i < x->number_of_arguments(); i++) { |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3110 Value a = x->argument_at(i); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3111 LIRItem* item = new LIRItem(a, this); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3112 item->load_item(); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3113 args->append(item->result()); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3114 signature->append(as_BasicType(a->type())); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3115 } |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3116 |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3117 LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3118 if (x->type() == voidType) { |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3119 set_no_result(x); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3120 } else { |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3121 __ move(result, rlock_result(x)); |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3122 } |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3123 } |
403dc4c1d7f5
6809483: hotspot:::method_entry are not correctly generated for "method()V"
never
parents:
2089
diff
changeset
|
3124 |
8860 | 3125 void LIRGenerator::do_Assert(Assert *x) { |
3126 #ifdef ASSERT | |
3127 ValueTag tag = x->x()->type()->tag(); | |
3128 If::Condition cond = x->cond(); | |
3129 | |
3130 LIRItem xitem(x->x(), this); | |
3131 LIRItem yitem(x->y(), this); | |
3132 LIRItem* xin = &xitem; | |
3133 LIRItem* yin = &yitem; | |
3134 | |
3135 assert(tag == intTag, "Only integer assertions are valid!"); | |
3136 | |
3137 xin->load_item(); | |
3138 yin->dont_load_item(); | |
3139 | |
3140 set_no_result(x); | |
3141 | |
3142 LIR_Opr left = xin->result(); | |
3143 LIR_Opr right = yin->result(); | |
3144 | |
3145 __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true); | |
3146 #endif | |
3147 } | |
3148 | |
3149 | |
3150 void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) { | |
3151 | |
3152 | |
3153 Instruction *a = x->x(); | |
3154 Instruction *b = x->y(); | |
3155 if (!a || StressRangeCheckElimination) { | |
3156 assert(!b || StressRangeCheckElimination, "B must also be null"); | |
3157 | |
3158 CodeEmitInfo *info = state_for(x, x->state()); | |
3159 CodeStub* stub = new PredicateFailedStub(info); | |
3160 | |
3161 __ jump(stub); | |
3162 } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) { | |
3163 int a_int = a->type()->as_IntConstant()->value(); | |
3164 int b_int = b->type()->as_IntConstant()->value(); | |
3165 | |
3166 bool ok = false; | |
3167 | |
3168 switch(x->cond()) { | |
3169 case Instruction::eql: ok = (a_int == b_int); break; | |
3170 case Instruction::neq: ok = (a_int != b_int); break; | |
3171 case Instruction::lss: ok = (a_int < b_int); break; | |
3172 case Instruction::leq: ok = (a_int <= b_int); break; | |
3173 case Instruction::gtr: ok = (a_int > b_int); break; | |
3174 case Instruction::geq: ok = (a_int >= b_int); break; | |
3175 case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break; | |
3176 case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break; | |
3177 default: ShouldNotReachHere(); | |
3178 } | |
3179 | |
3180 if (ok) { | |
3181 | |
3182 CodeEmitInfo *info = state_for(x, x->state()); | |
3183 CodeStub* stub = new PredicateFailedStub(info); | |
3184 | |
3185 __ jump(stub); | |
3186 } | |
3187 } else { | |
3188 | |
3189 ValueTag tag = x->x()->type()->tag(); | |
3190 If::Condition cond = x->cond(); | |
3191 LIRItem xitem(x->x(), this); | |
3192 LIRItem yitem(x->y(), this); | |
3193 LIRItem* xin = &xitem; | |
3194 LIRItem* yin = &yitem; | |
3195 | |
3196 assert(tag == intTag, "Only integer deoptimizations are valid!"); | |
3197 | |
3198 xin->load_item(); | |
3199 yin->dont_load_item(); | |
3200 set_no_result(x); | |
3201 | |
3202 LIR_Opr left = xin->result(); | |
3203 LIR_Opr right = yin->result(); | |
3204 | |
3205 CodeEmitInfo *info = state_for(x, x->state()); | |
3206 CodeStub* stub = new PredicateFailedStub(info); | |
3207 | |
3208 __ cmp(lir_cond(cond), left, right); | |
3209 __ branch(lir_cond(cond), right->type(), stub); | |
3210 } | |
3211 } | |
3212 | |
3213 | |
0 | 3214 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) { |
3215 LIRItemList args(1); | |
3216 LIRItem value(arg1, this); | |
3217 args.append(&value); | |
3218 BasicTypeList signature; | |
3219 signature.append(as_BasicType(arg1->type())); | |
3220 | |
3221 return call_runtime(&signature, &args, entry, result_type, info); | |
3222 } | |
3223 | |
3224 | |
3225 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) { | |
3226 LIRItemList args(2); | |
3227 LIRItem value1(arg1, this); | |
3228 LIRItem value2(arg2, this); | |
3229 args.append(&value1); | |
3230 args.append(&value2); | |
3231 BasicTypeList signature; | |
3232 signature.append(as_BasicType(arg1->type())); | |
3233 signature.append(as_BasicType(arg2->type())); | |
3234 | |
3235 return call_runtime(&signature, &args, entry, result_type, info); | |
3236 } | |
3237 | |
3238 | |
3239 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args, | |
3240 address entry, ValueType* result_type, CodeEmitInfo* info) { | |
3241 // get a result register | |
3242 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; | |
3243 LIR_Opr result = LIR_OprFact::illegalOpr; | |
3244 if (result_type->tag() != voidTag) { | |
3245 result = new_register(result_type); | |
3246 phys_reg = result_register_for(result_type); | |
3247 } | |
3248 | |
3249 // move the arguments into the correct location | |
3250 CallingConvention* cc = frame_map()->c_calling_convention(signature); | |
3251 assert(cc->length() == args->length(), "argument mismatch"); | |
3252 for (int i = 0; i < args->length(); i++) { | |
3253 LIR_Opr arg = args->at(i); | |
3254 LIR_Opr loc = cc->at(i); | |
3255 if (loc->is_register()) { | |
3256 __ move(arg, loc); | |
3257 } else { | |
3258 LIR_Address* addr = loc->as_address_ptr(); | |
3259 // if (!can_store_as_constant(arg)) { | |
3260 // LIR_Opr tmp = new_register(arg->type()); | |
3261 // __ move(arg, tmp); | |
3262 // arg = tmp; | |
3263 // } | |
3264 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
3265 __ unaligned_move(arg, addr); | |
3266 } else { | |
3267 __ move(arg, addr); | |
3268 } | |
3269 } | |
3270 } | |
3271 | |
3272 if (info) { | |
3273 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); | |
3274 } else { | |
3275 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); | |
3276 } | |
3277 if (result->is_valid()) { | |
3278 __ move(phys_reg, result); | |
3279 } | |
3280 return result; | |
3281 } | |
3282 | |
3283 | |
3284 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args, | |
3285 address entry, ValueType* result_type, CodeEmitInfo* info) { | |
3286 // get a result register | |
3287 LIR_Opr phys_reg = LIR_OprFact::illegalOpr; | |
3288 LIR_Opr result = LIR_OprFact::illegalOpr; | |
3289 if (result_type->tag() != voidTag) { | |
3290 result = new_register(result_type); | |
3291 phys_reg = result_register_for(result_type); | |
3292 } | |
3293 | |
3294 // move the arguments into the correct location | |
3295 CallingConvention* cc = frame_map()->c_calling_convention(signature); | |
3296 | |
3297 assert(cc->length() == args->length(), "argument mismatch"); | |
3298 for (int i = 0; i < args->length(); i++) { | |
3299 LIRItem* arg = args->at(i); | |
3300 LIR_Opr loc = cc->at(i); | |
3301 if (loc->is_register()) { | |
3302 arg->load_item_force(loc); | |
3303 } else { | |
3304 LIR_Address* addr = loc->as_address_ptr(); | |
3305 arg->load_for_store(addr->type()); | |
3306 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { | |
3307 __ unaligned_move(arg->result(), addr); | |
3308 } else { | |
3309 __ move(arg->result(), addr); | |
3310 } | |
3311 } | |
3312 } | |
3313 | |
3314 if (info) { | |
3315 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); | |
3316 } else { | |
3317 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); | |
3318 } | |
3319 if (result->is_valid()) { | |
3320 __ move(phys_reg, result); | |
3321 } | |
3322 return result; | |
3323 } | |
4966
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3324 |
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3325 void LIRGenerator::do_MemBar(MemBar* x) { |
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3326 if (os::is_MP()) { |
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3327 LIR_Code code = x->code(); |
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3328 switch(code) { |
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3329 case lir_membar_acquire : __ membar_acquire(); break; |
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3330 case lir_membar_release : __ membar_release(); break; |
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3331 case lir_membar : __ membar(); break; |
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3332 case lir_membar_loadload : __ membar_loadload(); break; |
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3333 case lir_membar_storestore: __ membar_storestore(); break; |
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3334 case lir_membar_loadstore : __ membar_loadstore(); break; |
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3335 case lir_membar_storeload : __ membar_storeload(); break; |
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3336 default : ShouldNotReachHere(); break; |
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3337 } |
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3338 } |
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3339 } |