1 /*
2 * Copyright (c) 1998, 2013, 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 "classfile/systemDictionary.hpp"
27 #include "compiler/compileLog.hpp"
28 #include "oops/objArrayKlass.hpp"
29 #include "opto/addnode.hpp"
30 #include "opto/memnode.hpp"
31 #include "opto/mulnode.hpp"
32 #include "opto/parse.hpp"
33 #include "opto/rootnode.hpp"
34 #include "opto/runtime.hpp"
35 #include "runtime/sharedRuntime.hpp"
36
37 //------------------------------make_dtrace_method_entry_exit ----------------
38 // Dtrace -- record entry or exit of a method if compiled with dtrace support
39 void GraphKit::make_dtrace_method_entry_exit(ciMethod* method, bool is_entry) {
40 const TypeFunc *call_type = OptoRuntime::dtrace_method_entry_exit_Type();
41 address call_address = is_entry ? CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry) :
42 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit);
43 const char *call_name = is_entry ? "dtrace_method_entry" : "dtrace_method_exit";
44
45 // Get base of thread-local storage area
46 Node* thread = _gvn.transform( new (C) ThreadLocalNode() );
47
48 // Get method
49 const TypePtr* method_type = TypeMetadataPtr::make(method);
50 Node *method_node = _gvn.transform( ConNode::make(C, method_type) );
51
52 kill_dead_locals();
53
54 // For some reason, this call reads only raw memory.
55 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
56 make_runtime_call(RC_LEAF | RC_NARROW_MEM,
57 call_type, call_address,
58 call_name, raw_adr_type,
59 thread, method_node);
60 }
61
62
63 //=============================================================================
64 //------------------------------do_checkcast-----------------------------------
65 void Parse::do_checkcast() {
66 bool will_link;
67 ciKlass* klass = iter().get_klass(will_link);
68
69 Node *obj = peek();
70
71 // Throw uncommon trap if class is not loaded or the value we are casting
72 // _from_ is not loaded, and value is not null. If the value _is_ NULL,
73 // then the checkcast does nothing.
74 const TypeOopPtr *tp = _gvn.type(obj)->isa_oopptr();
75 if (!will_link || (tp && tp->klass() && !tp->klass()->is_loaded())) {
76 if (C->log() != NULL) {
77 if (!will_link) {
78 C->log()->elem("assert_null reason='checkcast' klass='%d'",
79 C->log()->identify(klass));
80 }
81 if (tp && tp->klass() && !tp->klass()->is_loaded()) {
82 // %%% Cannot happen?
83 C->log()->elem("assert_null reason='checkcast source' klass='%d'",
84 C->log()->identify(tp->klass()));
85 }
86 }
87 null_assert(obj);
88 assert( stopped() || _gvn.type(peek())->higher_equal(TypePtr::NULL_PTR), "what's left behind is null" );
89 if (!stopped()) {
90 profile_null_checkcast();
91 }
92 return;
93 }
94
95 Node *res = gen_checkcast(obj, makecon(TypeKlassPtr::make(klass)) );
96
97 // Pop from stack AFTER gen_checkcast because it can uncommon trap and
98 // the debug info has to be correct.
99 pop();
100 push(res);
101 }
102
103
104 //------------------------------do_instanceof----------------------------------
105 void Parse::do_instanceof() {
106 if (stopped()) return;
107 // We would like to return false if class is not loaded, emitting a
108 // dependency, but Java requires instanceof to load its operand.
109
110 // Throw uncommon trap if class is not loaded
111 bool will_link;
112 ciKlass* klass = iter().get_klass(will_link);
113
114 if (!will_link) {
115 if (C->log() != NULL) {
116 C->log()->elem("assert_null reason='instanceof' klass='%d'",
117 C->log()->identify(klass));
118 }
119 null_assert(peek());
120 assert( stopped() || _gvn.type(peek())->higher_equal(TypePtr::NULL_PTR), "what's left behind is null" );
121 if (!stopped()) {
122 // The object is now known to be null.
123 // Shortcut the effect of gen_instanceof and return "false" directly.
124 pop(); // pop the null
125 push(_gvn.intcon(0)); // push false answer
126 }
127 return;
128 }
129
130 // Push the bool result back on stack
131 Node* res = gen_instanceof(peek(), makecon(TypeKlassPtr::make(klass)), true);
132
133 // Pop from stack AFTER gen_instanceof because it can uncommon trap.
134 pop();
135 push(res);
136 }
137
138 //------------------------------array_store_check------------------------------
139 // pull array from stack and check that the store is valid
140 void Parse::array_store_check() {
141
142 // Shorthand access to array store elements without popping them.
143 Node *obj = peek(0);
144 Node *idx = peek(1);
145 Node *ary = peek(2);
146
147 if (_gvn.type(obj) == TypePtr::NULL_PTR) {
148 // There's never a type check on null values.
149 // This cutout lets us avoid the uncommon_trap(Reason_array_check)
150 // below, which turns into a performance liability if the
151 // gen_checkcast folds up completely.
152 return;
153 }
154
155 // Extract the array klass type
156 int klass_offset = oopDesc::klass_offset_in_bytes();
157 Node* p = basic_plus_adr( ary, ary, klass_offset );
158 // p's type is array-of-OOPS plus klass_offset
159 Node* array_klass = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS) );
160 // Get the array klass
161 const TypeKlassPtr *tak = _gvn.type(array_klass)->is_klassptr();
162
163 // array_klass's type is generally INexact array-of-oop. Heroically
164 // cast the array klass to EXACT array and uncommon-trap if the cast
165 // fails.
166 bool always_see_exact_class = false;
167 if (MonomorphicArrayCheck
168 && !too_many_traps(Deoptimization::Reason_array_check)) {
169 always_see_exact_class = true;
170 // (If no MDO at all, hope for the best, until a trap actually occurs.)
171 }
172
173 // Is the array klass is exactly its defined type?
174 if (always_see_exact_class && !tak->klass_is_exact()) {
175 // Make a constant out of the inexact array klass
176 const TypeKlassPtr *extak = tak->cast_to_exactness(true)->is_klassptr();
177 Node* con = makecon(extak);
178 Node* cmp = _gvn.transform(new (C) CmpPNode( array_klass, con ));
179 Node* bol = _gvn.transform(new (C) BoolNode( cmp, BoolTest::eq ));
180 Node* ctrl= control();
181 { BuildCutout unless(this, bol, PROB_MAX);
182 uncommon_trap(Deoptimization::Reason_array_check,
183 Deoptimization::Action_maybe_recompile,
184 tak->klass());
185 }
186 if (stopped()) { // MUST uncommon-trap?
187 set_control(ctrl); // Then Don't Do It, just fall into the normal checking
188 } else { // Cast array klass to exactness:
189 // Use the exact constant value we know it is.
190 replace_in_map(array_klass,con);
191 CompileLog* log = C->log();
192 if (log != NULL) {
193 log->elem("cast_up reason='monomorphic_array' from='%d' to='(exact)'",
194 log->identify(tak->klass()));
195 }
196 array_klass = con; // Use cast value moving forward
197 }
198 }
199
200 // Come here for polymorphic array klasses
201
202 // Extract the array element class
203 int element_klass_offset = in_bytes(ObjArrayKlass::element_klass_offset());
204 Node *p2 = basic_plus_adr(array_klass, array_klass, element_klass_offset);
205 Node *a_e_klass = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p2, tak) );
206
207 // Check (the hard way) and throw if not a subklass.
208 // Result is ignored, we just need the CFG effects.
209 gen_checkcast( obj, a_e_klass );
210 }
211
212
213 void Parse::emit_guard_for_new(ciInstanceKlass* klass) {
214 // Emit guarded new
215 // if (klass->_init_thread != current_thread ||
216 // klass->_init_state != being_initialized)
217 // uncommon_trap
218 Node* cur_thread = _gvn.transform( new (C) ThreadLocalNode() );
219 Node* merge = new (C) RegionNode(3);
220 _gvn.set_type(merge, Type::CONTROL);
221 Node* kls = makecon(TypeKlassPtr::make(klass));
222
223 Node* init_thread_offset = _gvn.MakeConX(in_bytes(InstanceKlass::init_thread_offset()));
224 Node* adr_node = basic_plus_adr(kls, kls, init_thread_offset);
225 Node* init_thread = make_load(NULL, adr_node, TypeRawPtr::BOTTOM, T_ADDRESS, false, LoadNode::unordered);
226 Node *tst = Bool( CmpP( init_thread, cur_thread), BoolTest::eq);
227 IfNode* iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
228 set_control(IfTrue(iff));
229 merge->set_req(1, IfFalse(iff));
230
231 Node* init_state_offset = _gvn.MakeConX(in_bytes(InstanceKlass::init_state_offset()));
232 adr_node = basic_plus_adr(kls, kls, init_state_offset);
233 // Use T_BOOLEAN for InstanceKlass::_init_state so the compiler
234 // can generate code to load it as unsigned byte.
235 Node* init_state = make_load(NULL, adr_node, TypeInt::UBYTE, T_BOOLEAN, false, LoadNode::unordered);
236 Node* being_init = _gvn.intcon(InstanceKlass::being_initialized);
237 tst = Bool( CmpI( init_state, being_init), BoolTest::eq);
238 iff = create_and_map_if(control(), tst, PROB_ALWAYS, COUNT_UNKNOWN);
239 set_control(IfTrue(iff));
240 merge->set_req(2, IfFalse(iff));
241
242 PreserveJVMState pjvms(this);
243 record_for_igvn(merge);
244 set_control(merge);
245
246 uncommon_trap(Deoptimization::Reason_uninitialized,
247 Deoptimization::Action_reinterpret,
248 klass);
249 }
250
251
252 //------------------------------do_new-----------------------------------------
253 void Parse::do_new() {
254 kill_dead_locals();
255
256 bool will_link;
257 ciInstanceKlass* klass = iter().get_klass(will_link)->as_instance_klass();
258 assert(will_link, "_new: typeflow responsibility");
259
260 // Should initialize, or throw an InstantiationError?
261 if (!klass->is_initialized() && !klass->is_being_initialized() ||
262 klass->is_abstract() || klass->is_interface() ||
263 klass->name() == ciSymbol::java_lang_Class() ||
264 iter().is_unresolved_klass()) {
265 uncommon_trap(Deoptimization::Reason_uninitialized,
266 Deoptimization::Action_reinterpret,
267 klass);
268 return;
269 }
270 if (klass->is_being_initialized()) {
271 emit_guard_for_new(klass);
272 }
273
274 Node* kls = makecon(TypeKlassPtr::make(klass));
275 Node* obj = new_instance(kls);
276
277 // Push resultant oop onto stack
278 push(obj);
279
280 // Keep track of whether opportunities exist for StringBuilder
281 // optimizations.
282 if (OptimizeStringConcat &&
283 (klass == C->env()->StringBuilder_klass() ||
284 klass == C->env()->StringBuffer_klass())) {
285 C->set_has_stringbuilder(true);
286 }
287
288 // Keep track of boxed values for EliminateAutoBox optimizations.
289 if (C->eliminate_boxing() && klass->is_box_klass()) {
290 C->set_has_boxed_value(true);
291 }
292 }
293
294 #ifndef PRODUCT
295 //------------------------------dump_map_adr_mem-------------------------------
296 // Debug dump of the mapping from address types to MergeMemNode indices.
297 void Parse::dump_map_adr_mem() const {
298 tty->print_cr("--- Mapping from address types to memory Nodes ---");
299 MergeMemNode *mem = map() == NULL ? NULL : (map()->memory()->is_MergeMem() ?
300 map()->memory()->as_MergeMem() : NULL);
301 for (uint i = 0; i < (uint)C->num_alias_types(); i++) {
302 C->alias_type(i)->print_on(tty);
303 tty->print("\t");
304 // Node mapping, if any
305 if (mem && i < mem->req() && mem->in(i) && mem->in(i) != mem->empty_memory()) {
306 mem->in(i)->dump();
307 } else {
308 tty->cr();
309 }
310 }
311 }
312
313 #endif
314
315
316 //=============================================================================
317 //
318 // parser methods for profiling
319
320
321 //----------------------test_counter_against_threshold ------------------------
322 void Parse::test_counter_against_threshold(Node* cnt, int limit) {
323 // Test the counter against the limit and uncommon trap if greater.
324
325 // This code is largely copied from the range check code in
326 // array_addressing()
327
328 // Test invocation count vs threshold
329 Node *threshold = makecon(TypeInt::make(limit));
330 Node *chk = _gvn.transform( new (C) CmpUNode( cnt, threshold) );
331 BoolTest::mask btest = BoolTest::lt;
332 Node *tst = _gvn.transform( new (C) BoolNode( chk, btest) );
333 // Branch to failure if threshold exceeded
334 { BuildCutout unless(this, tst, PROB_ALWAYS);
335 uncommon_trap(Deoptimization::Reason_age,
336 Deoptimization::Action_maybe_recompile);
337 }
338 }
339
340 //----------------------increment_and_test_invocation_counter-------------------
341 void Parse::increment_and_test_invocation_counter(int limit) {
342 if (!count_invocations()) return;
343
344 // Get the Method* node.
345 ciMethod* m = method();
346 MethodCounters* counters_adr = m->ensure_method_counters();
347 if (counters_adr == NULL) {
348 C->record_failure("method counters allocation failed");
349 return;
350 }
351
352 Node* ctrl = control();
353 const TypePtr* adr_type = TypeRawPtr::make((address) counters_adr);
354 Node *counters_node = makecon(adr_type);
355 Node* adr_iic_node = basic_plus_adr(counters_node, counters_node,
356 MethodCounters::interpreter_invocation_counter_offset_in_bytes());
357 Node* cnt = make_load(ctrl, adr_iic_node, TypeInt::INT, T_INT, adr_type, false, LoadNode::unordered);
358
359 test_counter_against_threshold(cnt, limit);
360
361 // Add one to the counter and store
362 Node* incr = _gvn.transform(new (C) AddINode(cnt, _gvn.intcon(1)));
363 store_to_memory(ctrl, adr_iic_node, incr, T_INT, adr_type, false, StoreNode::unordered);
364 }
365
366 //----------------------------method_data_addressing---------------------------
367 Node* Parse::method_data_addressing(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, Node* idx, uint stride) {
368 // Get offset within MethodData* of the data array
369 ByteSize data_offset = MethodData::data_offset();
370
371 // Get cell offset of the ProfileData within data array
372 int cell_offset = md->dp_to_di(data->dp());
373
374 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
375 int offset = in_bytes(data_offset) + cell_offset + in_bytes(counter_offset);
376
377 const TypePtr* adr_type = TypeMetadataPtr::make(md);
378 Node* mdo = makecon(adr_type);
379 Node* ptr = basic_plus_adr(mdo, mdo, offset);
380
381 if (stride != 0) {
382 Node* str = _gvn.MakeConX(stride);
383 Node* scale = _gvn.transform( new (C) MulXNode( idx, str ) );
384 ptr = _gvn.transform( new (C) AddPNode( mdo, ptr, scale ) );
385 }
386
387 return ptr;
388 }
389
390 //--------------------------increment_md_counter_at----------------------------
391 void Parse::increment_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, Node* idx, uint stride) {
392 Node* adr_node = method_data_addressing(md, data, counter_offset, idx, stride);
393
394 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
395 Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type, false, LoadNode::unordered);
396 Node* incr = _gvn.transform(new (C) AddINode(cnt, _gvn.intcon(DataLayout::counter_increment)));
397 store_to_memory(NULL, adr_node, incr, T_INT, adr_type, false, StoreNode::unordered);
398 }
399
400 //--------------------------test_for_osr_md_counter_at-------------------------
401 void Parse::test_for_osr_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize counter_offset, int limit) {
402 Node* adr_node = method_data_addressing(md, data, counter_offset);
403
404 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
405 Node* cnt = make_load(NULL, adr_node, TypeInt::INT, T_INT, adr_type, false, LoadNode::unordered);
406
407 test_counter_against_threshold(cnt, limit);
408 }
409
410 //-------------------------------set_md_flag_at--------------------------------
411 void Parse::set_md_flag_at(ciMethodData* md, ciProfileData* data, int flag_constant) {
412 Node* adr_node = method_data_addressing(md, data, DataLayout::flags_offset());
413
414 const TypePtr* adr_type = _gvn.type(adr_node)->is_ptr();
415 Node* flags = make_load(NULL, adr_node, TypeInt::BYTE, T_BYTE, adr_type, false, LoadNode::unordered);
416 Node* incr = _gvn.transform(new (C) OrINode(flags, _gvn.intcon(flag_constant)));
417 store_to_memory(NULL, adr_node, incr, T_BYTE, adr_type, false, StoreNode::unordered);
418 }
419
420 //----------------------------profile_taken_branch-----------------------------
421 void Parse::profile_taken_branch(int target_bci, bool force_update) {
422 // This is a potential osr_site if we have a backedge.
423 int cur_bci = bci();
424 bool osr_site =
425 (target_bci <= cur_bci) && count_invocations() && UseOnStackReplacement;
426
427 // If we are going to OSR, restart at the target bytecode.
428 set_bci(target_bci);
429
430 // To do: factor out the the limit calculations below. These duplicate
431 // the similar limit calculations in the interpreter.
432
433 if (method_data_update() || force_update) {
434 ciMethodData* md = method()->method_data();
435 assert(md != NULL, "expected valid ciMethodData");
436 ciProfileData* data = md->bci_to_data(cur_bci);
437 assert(data->is_JumpData(), "need JumpData for taken branch");
438 increment_md_counter_at(md, data, JumpData::taken_offset());
439 }
440
441 // In the new tiered system this is all we need to do. In the old
442 // (c2 based) tiered sytem we must do the code below.
443 #ifndef TIERED
444 if (method_data_update()) {
445 ciMethodData* md = method()->method_data();
446 if (osr_site) {
447 ciProfileData* data = md->bci_to_data(cur_bci);
448 int limit = (CompileThreshold
449 * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100;
450 test_for_osr_md_counter_at(md, data, JumpData::taken_offset(), limit);
451 }
452 } else {
453 // With method data update off, use the invocation counter to trigger an
454 // OSR compilation, as done in the interpreter.
455 if (osr_site) {
456 int limit = (CompileThreshold * OnStackReplacePercentage) / 100;
457 increment_and_test_invocation_counter(limit);
458 }
459 }
460 #endif // TIERED
461
462 // Restore the original bytecode.
463 set_bci(cur_bci);
464 }
465
466 //--------------------------profile_not_taken_branch---------------------------
467 void Parse::profile_not_taken_branch(bool force_update) {
468
469 if (method_data_update() || force_update) {
470 ciMethodData* md = method()->method_data();
471 assert(md != NULL, "expected valid ciMethodData");
472 ciProfileData* data = md->bci_to_data(bci());
473 assert(data->is_BranchData(), "need BranchData for not taken branch");
474 increment_md_counter_at(md, data, BranchData::not_taken_offset());
475 }
476
477 }
478
479 //---------------------------------profile_call--------------------------------
480 void Parse::profile_call(Node* receiver) {
481 if (!method_data_update()) return;
482
483 switch (bc()) {
484 case Bytecodes::_invokevirtual:
485 case Bytecodes::_invokeinterface:
486 profile_receiver_type(receiver);
487 break;
488 case Bytecodes::_invokestatic:
489 case Bytecodes::_invokedynamic:
490 case Bytecodes::_invokespecial:
491 profile_generic_call();
492 break;
493 default: fatal("unexpected call bytecode");
494 }
495 }
496
497 //------------------------------profile_generic_call---------------------------
498 void Parse::profile_generic_call() {
499 assert(method_data_update(), "must be generating profile code");
500
501 ciMethodData* md = method()->method_data();
502 assert(md != NULL, "expected valid ciMethodData");
503 ciProfileData* data = md->bci_to_data(bci());
504 assert(data->is_CounterData(), "need CounterData for not taken branch");
505 increment_md_counter_at(md, data, CounterData::count_offset());
506 }
507
508 //-----------------------------profile_receiver_type---------------------------
509 void Parse::profile_receiver_type(Node* receiver) {
510 assert(method_data_update(), "must be generating profile code");
511
512 ciMethodData* md = method()->method_data();
513 assert(md != NULL, "expected valid ciMethodData");
514 ciProfileData* data = md->bci_to_data(bci());
515 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData here");
516
517 // Skip if we aren't tracking receivers
518 if (TypeProfileWidth < 1) {
519 increment_md_counter_at(md, data, CounterData::count_offset());
520 return;
521 }
522 ciReceiverTypeData* rdata = (ciReceiverTypeData*)data->as_ReceiverTypeData();
523
524 Node* method_data = method_data_addressing(md, rdata, in_ByteSize(0));
525
526 // Using an adr_type of TypePtr::BOTTOM to work around anti-dep problems.
527 // A better solution might be to use TypeRawPtr::BOTTOM with RC_NARROW_MEM.
528 make_runtime_call(RC_LEAF, OptoRuntime::profile_receiver_type_Type(),
529 CAST_FROM_FN_PTR(address,
530 OptoRuntime::profile_receiver_type_C),
531 "profile_receiver_type_C",
532 TypePtr::BOTTOM,
533 method_data, receiver);
534 }
535
536 //---------------------------------profile_ret---------------------------------
537 void Parse::profile_ret(int target_bci) {
538 if (!method_data_update()) return;
539
540 // Skip if we aren't tracking ret targets
541 if (TypeProfileWidth < 1) return;
542
543 ciMethodData* md = method()->method_data();
544 assert(md != NULL, "expected valid ciMethodData");
545 ciProfileData* data = md->bci_to_data(bci());
546 assert(data->is_RetData(), "need RetData for ret");
547 ciRetData* ret_data = (ciRetData*)data->as_RetData();
548
549 // Look for the target_bci is already in the table
550 uint row;
551 bool table_full = true;
552 for (row = 0; row < ret_data->row_limit(); row++) {
553 int key = ret_data->bci(row);
554 table_full &= (key != RetData::no_bci);
555 if (key == target_bci) break;
556 }
557
558 if (row >= ret_data->row_limit()) {
559 // The target_bci was not found in the table.
560 if (!table_full) {
561 // XXX: Make slow call to update RetData
562 }
563 return;
564 }
565
566 // the target_bci is already in the table
567 increment_md_counter_at(md, data, RetData::bci_count_offset(row));
568 }
569
570 //--------------------------profile_null_checkcast----------------------------
571 void Parse::profile_null_checkcast() {
572 // Set the null-seen flag, done in conjunction with the usual null check. We
573 // never unset the flag, so this is a one-way switch.
574 if (!method_data_update()) return;
575
576 ciMethodData* md = method()->method_data();
577 assert(md != NULL, "expected valid ciMethodData");
578 ciProfileData* data = md->bci_to_data(bci());
579 assert(data->is_BitData(), "need BitData for checkcast");
580 set_md_flag_at(md, data, BitData::null_seen_byte_constant());
581 }
582
583 //-----------------------------profile_switch_case-----------------------------
584 void Parse::profile_switch_case(int table_index) {
585 if (!method_data_update()) return;
586
587 ciMethodData* md = method()->method_data();
588 assert(md != NULL, "expected valid ciMethodData");
589
590 ciProfileData* data = md->bci_to_data(bci());
591 assert(data->is_MultiBranchData(), "need MultiBranchData for switch case");
592 if (table_index >= 0) {
593 increment_md_counter_at(md, data, MultiBranchData::case_count_offset(table_index));
594 } else {
595 increment_md_counter_at(md, data, MultiBranchData::default_count_offset());
596 }
597 }