1 /*
2 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciValueKlass.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "compiler/compileLog.hpp"
29 #include "oops/objArrayKlass.hpp"
30 #include "opto/addnode.hpp"
31 #include "opto/memnode.hpp"
32 #include "opto/mulnode.hpp"
33 #include "opto/parse.hpp"
34 #include "opto/rootnode.hpp"
35 #include "opto/runtime.hpp"
36 #include "opto/valuetypenode.hpp"
37 #include "runtime/sharedRuntime.hpp"
38
39 //------------------------------make_dtrace_method_entry_exit ----------------
40 // Dtrace -- record entry or exit of a method if compiled with dtrace support
41 void GraphKit::make_dtrace_method_entry_exit(ciMethod* method, bool is_entry) {
42 const TypeFunc *call_type = OptoRuntime::dtrace_method_entry_exit_Type();
43 address call_address = is_entry ? CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry) :
44 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit);
45 const char *call_name = is_entry ? "dtrace_method_entry" : "dtrace_method_exit";
46
47 // Get base of thread-local storage area
48 Node* thread = _gvn.transform( new ThreadLocalNode() );
49
50 // Get method
51 const TypePtr* method_type = TypeMetadataPtr::make(method);
52 Node *method_node = _gvn.transform(ConNode::make(method_type));
53
54 kill_dead_locals();
55
56 // For some reason, this call reads only raw memory.
57 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
58 make_runtime_call(RC_LEAF | RC_NARROW_MEM,
59 call_type, call_address,
60 call_name, raw_adr_type,
61 thread, method_node);
62 }
63
64
65 //=============================================================================
66 //------------------------------do_checkcast-----------------------------------
67 void Parse::do_checkcast() {
68 bool will_link;
69 ciKlass* klass = iter().get_klass(will_link);
70
71 Node *obj = peek();
72
73 // Throw uncommon trap if class is not loaded or the value we are casting
74 // _from_ is not loaded, and value is not null. If the value _is_ NULL,
75 // then the checkcast does nothing.
76 const TypeOopPtr *tp = _gvn.type(obj)->isa_oopptr();
77 if (!will_link || (tp && tp->klass() && !tp->klass()->is_loaded())) {
78 if (C->log() != NULL) {
79 if (!will_link) {
80 C->log()->elem("assert_null reason='checkcast' klass='%d'",
81 C->log()->identify(klass));
82 }
83 if (tp && tp->klass() && !tp->klass()->is_loaded()) {
84 // %%% Cannot happen?
85 C->log()->elem("assert_null reason='checkcast source' klass='%d'",
86 C->log()->identify(tp->klass()));
87 }
88 }
89 null_assert(obj);
90 assert( stopped() || _gvn.type(peek())->higher_equal(TypePtr::NULL_PTR), "what's left behind is null" );
91 if (!stopped()) {
92 profile_null_checkcast();
93 }
94 return;
95 }
96
97 Node *res = gen_checkcast(obj, makecon(TypeKlassPtr::make(klass)) );
98
99 // Pop from stack AFTER gen_checkcast because it can uncommon trap and
100 // the debug info has to be correct.
101 pop();
102 push(res);
103 }
104
105
106 //------------------------------do_instanceof----------------------------------
107 void Parse::do_instanceof() {
108 if (stopped()) return;
109 // We would like to return false if class is not loaded, emitting a
110 // dependency, but Java requires instanceof to load its operand.
111
112 // Throw uncommon trap if class is not loaded
113 bool will_link;
114 ciKlass* klass = iter().get_klass(will_link);
115
116 if (!will_link) {
117 if (C->log() != NULL) {
118 C->log()->elem("assert_null reason='instanceof' klass='%d'",
119 C->log()->identify(klass));
120 }
121 null_assert(peek());
122 assert( stopped() || _gvn.type(peek())->higher_equal(TypePtr::NULL_PTR), "what's left behind is null" );
123 if (!stopped()) {
124 // The object is now known to be null.
125 // Shortcut the effect of gen_instanceof and return "false" directly.
126 pop(); // pop the null
127 push(_gvn.intcon(0)); // push false answer
128 }
129 return;
130 }
131
132 // Push the bool result back on stack
133 Node* res = gen_instanceof(peek(), makecon(TypeKlassPtr::make(klass)), true);
134
135 // Pop from stack AFTER gen_instanceof because it can uncommon trap.
136 pop();
137 push(res);
138 }
139
140 //------------------------------array_store_check------------------------------
141 // pull array from stack and check that the store is valid
142 void Parse::array_store_check() {
143
144 // Shorthand access to array store elements without popping them.
145 Node *obj = peek(0);
146 Node *idx = peek(1);
147 Node *ary = peek(2);
148
149 if (_gvn.type(obj) == TypePtr::NULL_PTR) {
150 // There's never a type check on null values.
151 // This cutout lets us avoid the uncommon_trap(Reason_array_check)
152 // below, which turns into a performance liability if the
153 // gen_checkcast folds up completely.
154 return;
155 }
156
157 // Extract the array klass type
158 int klass_offset = oopDesc::klass_offset_in_bytes();
159 Node* p = basic_plus_adr( ary, ary, klass_offset );
160 // p's type is array-of-OOPS plus klass_offset
161 Node* array_klass = _gvn.transform(LoadKlassNode::make(_gvn, NULL, immutable_memory(), p, TypeInstPtr::KLASS));
162 // Get the array klass
163 const TypeKlassPtr *tak = _gvn.type(array_klass)->is_klassptr();
164
165 // The type of array_klass is usually INexact array-of-oop. Heroically
166 // cast array_klass to EXACT array and uncommon-trap if the cast fails.
167 // Make constant out of the inexact array klass, but use it only if the cast
168 // succeeds.
169 bool always_see_exact_class = false;
170 if (MonomorphicArrayCheck
171 && !too_many_traps(Deoptimization::Reason_array_check)
172 && !tak->klass_is_exact()
173 && tak != TypeKlassPtr::OBJECT) {
174 // Regarding the fourth condition in the if-statement from above:
175 //
176 // If the compiler has determined that the type of array 'ary' (represented
177 // by 'array_klass') is java/lang/Object, the compiler must not assume that
178 // the array 'ary' is monomorphic.
179 //
180 // If 'ary' were of type java/lang/Object, this arraystore would have to fail,
181 // because it is not possible to perform a arraystore into an object that is not
182 // a "proper" array.
183 //
184 // Therefore, let's obtain at runtime the type of 'ary' and check if we can still
185 // successfully perform the store.
186 //
187 // The implementation reasons for the condition are the following:
188 //
189 // java/lang/Object is the superclass of all arrays, but it is represented by the VM
190 // as an InstanceKlass. The checks generated by gen_checkcast() (see below) expect
191 // 'array_klass' to be ObjArrayKlass, which can result in invalid memory accesses.
192 //
193 // See issue JDK-8057622 for details.
194
195 always_see_exact_class = true;
196 // (If no MDO at all, hope for the best, until a trap actually occurs.)
197
198 // Make a constant out of the inexact array klass
199 const TypeKlassPtr *extak = tak->cast_to_exactness(true)->is_klassptr();
200 Node* con = makecon(extak);
201 Node* cmp = _gvn.transform(new CmpPNode( array_klass, con ));
202 Node* bol = _gvn.transform(new BoolNode( cmp, BoolTest::eq ));
203 Node* ctrl= control();
204 { BuildCutout unless(this, bol, PROB_MAX);
205 uncommon_trap(Deoptimization::Reason_array_check,
206 Deoptimization::Action_maybe_recompile,
207 tak->klass());
208 }
209 if (stopped()) { // MUST uncommon-trap?
210 set_control(ctrl); // Then Don't Do It, just fall into the normal checking
211 } else { // Cast array klass to exactness:
212 // Use the exact constant value we know it is.
213 replace_in_map(array_klass,con);
214 CompileLog* log = C->log();
215 if (log != NULL) {
216 log->elem("cast_up reason='monomorphic_array' from='%d' to='(exact)'",
217 log->identify(tak->klass()));
218 }
219 array_klass = con; // Use cast value moving forward
220 }
221 }
222
223 // Come here for polymorphic array klasses
224
225 // Extract the array element class
226 int element_klass_offset = in_bytes(ObjArrayKlass::element_klass_offset());
227 Node *p2 = basic_plus_adr(array_klass, array_klass, element_klass_offset);
228 // We are allowed to use the constant type only if cast succeeded. If always_see_exact_class is true,
229 // we must set a control edge from the IfTrue node created by the uncommon_trap above to the
230 // LoadKlassNode.
231 Node* a_e_klass = _gvn.transform(LoadKlassNode::make(_gvn, always_see_exact_class ? control() : NULL,
232 immutable_memory(), p2, tak));
233
234 // Check (the hard way) and throw if not a subklass.
235 // Result is ignored, we just need the CFG effects.
236 gen_checkcast(obj, a_e_klass);
237 }
238
239
240 void Parse::emit_guard_for_new(ciInstanceKlass* klass) {
241 // Emit guarded new
242 // if (klass->_init_thread != current_thread ||
243 // klass->_init_state != being_initialized)
244 // uncommon_trap
245 Node* cur_thread = _gvn.transform( new ThreadLocalNode() );
246 Node* merge = new RegionNode(3);
247 _gvn.set_type(merge, Type::CONTROL);
248 Node* kls = makecon(TypeKlassPtr::make(klass));
249
250 Node* init_thread_offset = _gvn.MakeConX(in_bytes(InstanceKlass::init_thread_offset()));
251 Node* adr_node = basic_plus_adr(kls, kls, init_thread_offset);
252 Node* init_thread = make_load(NULL, adr_node, TypeRawPtr::BOTTOM, T_ADDRESS, MemNode::unordered);
253 Node *tst = Bool( CmpP( init_thread, cur_thread), BoolTest::eq);
254 IfNode* iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
255 set_control(IfTrue(iff));
256 merge->set_req(1, IfFalse(iff));
257
258 Node* init_state_offset = _gvn.MakeConX(in_bytes(InstanceKlass::init_state_offset()));
259 adr_node = basic_plus_adr(kls, kls, init_state_offset);
260 // Use T_BOOLEAN for InstanceKlass::_init_state so the compiler
261 // can generate code to load it as unsigned byte.
262 Node* init_state = make_load(NULL, adr_node, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
263 Node* being_init = _gvn.intcon(InstanceKlass::being_initialized);
264 tst = Bool( CmpI( init_state, being_init), BoolTest::eq);
265 iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
266 set_control(IfTrue(iff));
267 merge->set_req(2, IfFalse(iff));
268
269 PreserveJVMState pjvms(this);
270 record_for_igvn(merge);
271 set_control(merge);
272
273 uncommon_trap(Deoptimization::Reason_uninitialized,
274 Deoptimization::Action_reinterpret,
275 klass);
276 }
277
278
279 //------------------------------do_new-----------------------------------------
280 void Parse::do_new() {
281 kill_dead_locals();
282
283 bool will_link;
284 ciInstanceKlass* klass = iter().get_klass(will_link)->as_instance_klass();
285 assert(will_link, "_new: typeflow responsibility");
286
287 // Should initialize, or throw an InstantiationError?
288 if (!klass->is_initialized() && !klass->is_being_initialized() ||
289 klass->is_abstract() || klass->is_interface() ||
290 klass->name() == ciSymbol::java_lang_Class() ||
291 iter().is_unresolved_klass()) {
292 uncommon_trap(Deoptimization::Reason_uninitialized,
293 Deoptimization::Action_reinterpret,
294 klass);
295 return;
296 }
297 if (klass->is_being_initialized()) {
298 emit_guard_for_new(klass);
299 }
300
301 Node* kls = makecon(TypeKlassPtr::make(klass));
302 Node* obj = new_instance(kls);
303
304 // Push resultant oop onto stack
305 push(obj);
306
307 // Keep track of whether opportunities exist for StringBuilder
308 // optimizations.
309 if (OptimizeStringConcat &&
310 (klass == C->env()->StringBuilder_klass() ||
311 klass == C->env()->StringBuffer_klass())) {
312 C->set_has_stringbuilder(true);
313 }
314
315 // Keep track of boxed values for EliminateAutoBox optimizations.
316 if (C->eliminate_boxing() && klass->is_box_klass()) {
317 C->set_has_boxed_value(true);
318 }
319 }
320
321 //------------------------------do_vnew-----------------------------------------
322 void Parse::do_vnew() {
323 kill_dead_locals();
324 // Fixme additional checks needed? (see InterpreterRuntime::_vnew)
325
326 // Create a new ValueTypeNode
327 ciValueKlass* vk = iter().method()->holder()->as_value_klass();
328 ValueTypeNode* vt = ValueTypeNode::make(_gvn, vk)->as_ValueType();
329
330 // Pop values from stack (last argument is first) and
331 // connect them to the ValueTypeNode in reverse order.
332 for (int i = vk->param_count() - 1; i >= 0 ; --i) {
333 ciType* field_type = vt->get_field_type(i);
334 Node* value = field_type->size() == 1 ? pop() : pop_pair();
335 vt->set_field_value(i, value);
336 }
337 push(_gvn.transform(vt));
338 }
339
340 #ifndef PRODUCT
341 //------------------------------dump_map_adr_mem-------------------------------
342 // Debug dump of the mapping from address types to MergeMemNode indices.
343 void Parse::dump_map_adr_mem() const {
344 tty->print_cr("--- Mapping from address types to memory Nodes ---");
345 MergeMemNode *mem = map() == NULL ? NULL : (map()->memory()->is_MergeMem() ?
346 map()->memory()->as_MergeMem() : NULL);
347 for (uint i = 0; i < (uint)C->num_alias_types(); i++) {
348 C->alias_type(i)->print_on(tty);
349 tty->print("\t");
350 // Node mapping, if any
351 if (mem && i < mem->req() && mem->in(i) && mem->in(i) != mem->empty_memory()) {
352 mem->in(i)->dump();
353 } else {
354 tty->cr();
355 }
356 }
357 }
358
359 #endif
360
361
362 //=============================================================================
363 //
364 // parser methods for profiling
365
366
367 //----------------------test_counter_against_threshold ------------------------
368 void Parse::test_counter_against_threshold(Node* cnt, int limit) {
369 // Test the counter against the limit and uncommon trap if greater.
370
371 // This code is largely copied from the range check code in
372 // array_addressing()
373
374 // Test invocation count vs threshold
375 Node *threshold = makecon(TypeInt::make(limit));
376 Node *chk = _gvn.transform( new CmpUNode( cnt, threshold) );
377 BoolTest::mask btest = BoolTest::lt;
378 Node *tst = _gvn.transform( new BoolNode( chk, btest) );
379 // Branch to failure if threshold exceeded
380 { BuildCutout unless(this, tst, PROB_ALWAYS);
381 uncommon_trap(Deoptimization::Reason_age,
382 Deoptimization::Action_maybe_recompile);
383 }
384 }
385
386 //----------------------increment_and_test_invocation_counter-------------------
387 void Parse::increment_and_test_invocation_counter(int limit) {
388 if (!count_invocations()) return;
389
390 // Get the Method* node.
391 ciMethod* m = method();
392 MethodCounters* counters_adr = m->ensure_method_counters();
393 if (counters_adr == NULL) {
394 C->record_failure("method counters allocation failed");
395 return;
396 }
397
398 Node* ctrl = control();
399 const TypePtr* adr_type = TypeRawPtr::make((address) counters_adr);
400 Node *counters_node = makecon(adr_type);
401 Node* adr_iic_node = basic_plus_adr(counters_node, counters_node,
402 MethodCounters::interpreter_invocation_counter_offset_in_bytes());
403 Node* cnt = make_load(ctrl, adr_iic_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
404
405 test_counter_against_threshold(cnt, limit);
406
407 // Add one to the counter and store
408 Node* incr = _gvn.transform(new AddINode(cnt, _gvn.intcon(1)));
409 store_to_memory(ctrl, adr_iic_node, incr, T_INT, adr_type, MemNode::unordered);
410 }
411
412 //----------------------------method_data_addressing---------------------------
413 Node* Parse::method_data_addressing(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, Node* idx, uint stride) {
414 // Get offset within MethodData* of the data array
415 ByteSize data_offset = MethodData::data_offset();
416
417 // Get cell offset of the ProfileData within data array
418 int cell_offset = md->dp_to_di(data->dp());
419
420 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
421 int offset = in_bytes(data_offset) + cell_offset + in_bytes(counter_offset);
422
423 const TypePtr* adr_type = TypeMetadataPtr::make(md);
424 Node* mdo = makecon(adr_type);
425 Node* ptr = basic_plus_adr(mdo, mdo, offset);
426
427 if (stride != 0) {
428 Node* str = _gvn.MakeConX(stride);
429 Node* scale = _gvn.transform( new MulXNode( idx, str ) );
430 ptr = _gvn.transform( new AddPNode( mdo, ptr, scale ) );
431 }
432
433 return ptr;
434 }
435
436 //--------------------------increment_md_counter_at----------------------------
437 void Parse::increment_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, Node* idx, uint stride) {
438 Node* adr_node = method_data_addressing(md, data, counter_offset, idx, stride);
439
440 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
441 Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
442 Node* incr = _gvn.transform(new AddINode(cnt, _gvn.intcon(DataLayout::counter_increment)));
443 store_to_memory(NULL, adr_node, incr, T_INT, adr_type, MemNode::unordered);
444 }
445
446 //--------------------------test_for_osr_md_counter_at-------------------------
447 void Parse::test_for_osr_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, int limit) {
448 Node* adr_node = method_data_addressing(md, data, counter_offset);
449
450 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
451 Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
452
453 test_counter_against_threshold(cnt, limit);
454 }
455
456 //-------------------------------set_md_flag_at--------------------------------
457 void Parse::set_md_flag_at(ciMethodData* md, ciProfileData* data, int flag_constant) {
458 Node* adr_node = method_data_addressing(md, data, DataLayout::flags_offset());
459
460 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
461 Node* flags = make_load(NULL, adr_node, TypeInt::BYTE, T_BYTE, adr_type, MemNode::unordered);
462 Node* incr = _gvn.transform(new OrINode(flags, _gvn.intcon(flag_constant)));
463 store_to_memory(NULL, adr_node, incr, T_BYTE, adr_type, MemNode::unordered);
464 }
465
466 //----------------------------profile_taken_branch-----------------------------
467 void Parse::profile_taken_branch(int target_bci, bool force_update) {
468 // This is a potential osr_site if we have a backedge.
469 int cur_bci = bci();
470 bool osr_site =
471 (target_bci <= cur_bci) && count_invocations() && UseOnStackReplacement;
472
473 // If we are going to OSR, restart at the target bytecode.
474 set_bci(target_bci);
475
476 // To do: factor out the the limit calculations below. These duplicate
477 // the similar limit calculations in the interpreter.
478
479 if (method_data_update() || force_update) {
480 ciMethodData* md = method()->method_data();
481 assert(md != NULL, "expected valid ciMethodData");
482 ciProfileData* data = md->bci_to_data(cur_bci);
483 assert(data->is_JumpData(), "need JumpData for taken branch");
484 increment_md_counter_at(md, data, JumpData::taken_offset());
485 }
486
487 // In the new tiered system this is all we need to do. In the old
488 // (c2 based) tiered sytem we must do the code below.
489 #ifndef TIERED
490 if (method_data_update()) {
491 ciMethodData* md = method()->method_data();
492 if (osr_site) {
493 ciProfileData* data = md->bci_to_data(cur_bci);
494 int limit = (CompileThreshold
495 * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100;
496 test_for_osr_md_counter_at(md, data, JumpData::taken_offset(), limit);
497 }
498 } else {
499 // With method data update off, use the invocation counter to trigger an
500 // OSR compilation, as done in the interpreter.
501 if (osr_site) {
502 int limit = (CompileThreshold * OnStackReplacePercentage) / 100;
503 increment_and_test_invocation_counter(limit);
504 }
505 }
506 #endif // TIERED
507
508 // Restore the original bytecode.
509 set_bci(cur_bci);
510 }
511
512 //--------------------------profile_not_taken_branch---------------------------
513 void Parse::profile_not_taken_branch(bool force_update) {
514
515 if (method_data_update() || force_update) {
516 ciMethodData* md = method()->method_data();
517 assert(md != NULL, "expected valid ciMethodData");
518 ciProfileData* data = md->bci_to_data(bci());
519 assert(data->is_BranchData(), "need BranchData for not taken branch");
520 increment_md_counter_at(md, data, BranchData::not_taken_offset());
521 }
522
523 }
524
525 //---------------------------------profile_call--------------------------------
526 void Parse::profile_call(Node* receiver) {
527 if (!method_data_update()) return;
528
529 switch (bc()) {
530 case Bytecodes::_invokevirtual:
531 case Bytecodes::_invokedirect:
532 case Bytecodes::_invokeinterface:
533 profile_receiver_type(receiver);
534 break;
535 case Bytecodes::_invokestatic:
536 case Bytecodes::_invokedynamic:
537 case Bytecodes::_invokespecial:
538 profile_generic_call();
539 break;
540 default: fatal("unexpected call bytecode");
541 }
542 }
543
544 //------------------------------profile_generic_call---------------------------
545 void Parse::profile_generic_call() {
546 assert(method_data_update(), "must be generating profile code");
547
548 ciMethodData* md = method()->method_data();
549 assert(md != NULL, "expected valid ciMethodData");
550 ciProfileData* data = md->bci_to_data(bci());
551 assert(data->is_CounterData(), "need CounterData for not taken branch");
552 increment_md_counter_at(md, data, CounterData::count_offset());
553 }
554
555 //-----------------------------profile_receiver_type---------------------------
556 void Parse::profile_receiver_type(Node* receiver) {
557 assert(method_data_update(), "must be generating profile code");
558
559 ciMethodData* md = method()->method_data();
560 assert(md != NULL, "expected valid ciMethodData");
561 ciProfileData* data = md->bci_to_data(bci());
562 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData here");
563
564 // Skip if we aren't tracking receivers
565 if (TypeProfileWidth < 1) {
566 increment_md_counter_at(md, data, CounterData::count_offset());
567 return;
568 }
569 ciReceiverTypeData* rdata = (ciReceiverTypeData*)data->as_ReceiverTypeData();
570
571 Node* method_data = method_data_addressing(md, rdata, in_ByteSize(0));
572
573 // Using an adr_type of TypePtr::BOTTOM to work around anti-dep problems.
574 // A better solution might be to use TypeRawPtr::BOTTOM with RC_NARROW_MEM.
575 make_runtime_call(RC_LEAF, OptoRuntime::profile_receiver_type_Type(),
576 CAST_FROM_FN_PTR(address,
577 OptoRuntime::profile_receiver_type_C),
578 "profile_receiver_type_C",
579 TypePtr::BOTTOM,
580 method_data, receiver);
581 }
582
583 //---------------------------------profile_ret---------------------------------
584 void Parse::profile_ret(int target_bci) {
585 if (!method_data_update()) return;
586
587 // Skip if we aren't tracking ret targets
588 if (TypeProfileWidth < 1) return;
589
590 ciMethodData* md = method()->method_data();
591 assert(md != NULL, "expected valid ciMethodData");
592 ciProfileData* data = md->bci_to_data(bci());
593 assert(data->is_RetData(), "need RetData for ret");
594 ciRetData* ret_data = (ciRetData*)data->as_RetData();
595
596 // Look for the target_bci is already in the table
597 uint row;
598 bool table_full = true;
599 for (row = 0; row < ret_data->row_limit(); row++) {
600 int key = ret_data->bci(row);
601 table_full &= (key != RetData::no_bci);
602 if (key == target_bci) break;
603 }
604
605 if (row >= ret_data->row_limit()) {
606 // The target_bci was not found in the table.
607 if (!table_full) {
608 // XXX: Make slow call to update RetData
609 }
610 return;
611 }
612
613 // the target_bci is already in the table
614 increment_md_counter_at(md, data, RetData::bci_count_offset(row));
615 }
616
617 //--------------------------profile_null_checkcast----------------------------
618 void Parse::profile_null_checkcast() {
619 // Set the null-seen flag, done in conjunction with the usual null check. We
620 // never unset the flag, so this is a one-way switch.
621 if (!method_data_update()) return;
622
623 ciMethodData* md = method()->method_data();
624 assert(md != NULL, "expected valid ciMethodData");
625 ciProfileData* data = md->bci_to_data(bci());
626 assert(data->is_BitData(), "need BitData for checkcast");
627 set_md_flag_at(md, data, BitData::null_seen_byte_constant());
628 }
629
630 //-----------------------------profile_switch_case-----------------------------
631 void Parse::profile_switch_case(int table_index) {
632 if (!method_data_update()) return;
633
634 ciMethodData* md = method()->method_data();
635 assert(md != NULL, "expected valid ciMethodData");
636
637 ciProfileData* data = md->bci_to_data(bci());
638 assert(data->is_MultiBranchData(), "need MultiBranchData for switch case");
639 if (table_index >= 0) {
640 increment_md_counter_at(md, data, MultiBranchData::case_count_offset(table_index));
641 } else {
642 increment_md_counter_at(md, data, MultiBranchData::default_count_offset());
643 }
644 }