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comparison src/share/vm/c1/c1_Runtime1.cpp @ 8860:46f6f063b272

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7153771: array bound check elimination for c1 Summary: when possible optimize out array bound checks, inserting predicates when needed. Reviewed-by: never, kvn, twisti Contributed-by: thomaswue <thomas.wuerthinger@oracle.com>
author roland
date Thu, 21 Mar 2013 09:27:54 +0100
parents 070d523b96a7
children b9a918201d47 92ef81e2f571
comparison
equal deleted inserted replaced
8780:98f3af397705 8860:46f6f063b272
1328 assert(mirror != NULL, "should null-check on mirror before calling"); 1328 assert(mirror != NULL, "should null-check on mirror before calling");
1329 Klass* k = java_lang_Class::as_Klass(mirror); 1329 Klass* k = java_lang_Class::as_Klass(mirror);
1330 return (k != NULL && obj != NULL && obj->is_a(k)) ? 1 : 0; 1330 return (k != NULL && obj != NULL && obj->is_a(k)) ? 1 : 0;
1331 JRT_END 1331 JRT_END
1332 1332
1333 JRT_ENTRY(void, Runtime1::predicate_failed_trap(JavaThread* thread))
1334 ResourceMark rm;
1335
1336 assert(!TieredCompilation, "incompatible with tiered compilation");
1337
1338 RegisterMap reg_map(thread, false);
1339 frame runtime_frame = thread->last_frame();
1340 frame caller_frame = runtime_frame.sender(&reg_map);
1341
1342 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
1343 assert (nm != NULL, "no more nmethod?");
1344 nm->make_not_entrant();
1345
1346 methodHandle m(nm->method());
1347 MethodData* mdo = m->method_data();
1348
1349 if (mdo == NULL && !HAS_PENDING_EXCEPTION) {
1350 // Build an MDO. Ignore errors like OutOfMemory;
1351 // that simply means we won't have an MDO to update.
1352 Method::build_interpreter_method_data(m, THREAD);
1353 if (HAS_PENDING_EXCEPTION) {
1354 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1355 CLEAR_PENDING_EXCEPTION;
1356 }
1357 mdo = m->method_data();
1358 }
1359
1360 if (mdo != NULL) {
1361 mdo->inc_trap_count(Deoptimization::Reason_none);
1362 }
1363
1364 if (TracePredicateFailedTraps) {
1365 stringStream ss1, ss2;
1366 vframeStream vfst(thread);
1367 methodHandle inlinee = methodHandle(vfst.method());
1368 inlinee->print_short_name(&ss1);
1369 m->print_short_name(&ss2);
1370 tty->print_cr("Predicate failed trap in method %s at bci %d inlined in %s at pc %x", ss1.as_string(), vfst.bci(), ss2.as_string(), caller_frame.pc());
1371 }
1372
1373
1374 Deoptimization::deoptimize_frame(thread, caller_frame.id());
1375
1376 JRT_END
1333 1377
1334 #ifndef PRODUCT 1378 #ifndef PRODUCT
1335 void Runtime1::print_statistics() { 1379 void Runtime1::print_statistics() {
1336 tty->print_cr("C1 Runtime statistics:"); 1380 tty->print_cr("C1 Runtime statistics:");
1337 tty->print_cr(" _resolve_invoke_virtual_cnt: %d", SharedRuntime::_resolve_virtual_ctr); 1381 tty->print_cr(" _resolve_invoke_virtual_cnt: %d", SharedRuntime::_resolve_virtual_ctr);