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6939930: exception unwind changes in 6919934 hurts compilation speed

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Reviewed-by: twisti
This commit is contained in:
Tom Rodriguez 2010-04-15 18:14:49 -07:00
parent a1446b775d
commit 98ee92e724
14 changed files with 208 additions and 101 deletions
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22
hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
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@ -1765,35 +1765,17 @@ void LIRGenerator::do_Throw(Throw* x) {
__ null_check(exception_opr, new CodeEmitInfo(info, true));
}
if (compilation()->env()->jvmti_can_post_on_exceptions() &&
!block()->is_set(BlockBegin::default_exception_handler_flag)) {
if (compilation()->env()->jvmti_can_post_on_exceptions()) {
// we need to go through the exception lookup path to get JVMTI
// notification done
unwind = false;
}
assert(!block()->is_set(BlockBegin::default_exception_handler_flag) || unwind,
"should be no more handlers to dispatch to");
if (compilation()->env()->dtrace_method_probes() &&
block()->is_set(BlockBegin::default_exception_handler_flag)) {
// notify that this frame is unwinding
BasicTypeList signature;
signature.append(T_INT); // thread
signature.append(T_OBJECT); // methodOop
LIR_OprList* args = new LIR_OprList();
args->append(getThreadPointer());
LIR_Opr meth = new_register(T_OBJECT);
__ oop2reg(method()->constant_encoding(), meth);
args->append(meth);
call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
}
// move exception oop into fixed register
__ move(exception_opr, exceptionOopOpr());
if (unwind) {
__ unwind_exception(LIR_OprFact::illegalOpr, exceptionOopOpr(), info);
__ unwind_exception(exceptionOopOpr());
} else {
__ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
}