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7033154: Improve C1 arraycopy performance

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Better static analysis. Take advantage of array copy stubs.

Reviewed-by: never
This commit is contained in:
Roland Westrelin 2011-04-03 12:00:54 +02:00
parent 00eca5e982
commit f94d7776ca
13 changed files with 720 additions and 146 deletions
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8
hotspot/src/share/vm/c1/c1_Optimizer.cpp
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@ -644,7 +644,7 @@ void NullCheckVisitor::do_CheckCast (CheckCast* x) {}
void NullCheckVisitor::do_InstanceOf (InstanceOf* x) {}
void NullCheckVisitor::do_MonitorEnter (MonitorEnter* x) { nce()->handle_AccessMonitor(x); }
void NullCheckVisitor::do_MonitorExit (MonitorExit* x) { nce()->handle_AccessMonitor(x); }
void NullCheckVisitor::do_Intrinsic (Intrinsic* x) { nce()->clear_last_explicit_null_check(); }
void NullCheckVisitor::do_Intrinsic (Intrinsic* x) { nce()->handle_Intrinsic(x); }
void NullCheckVisitor::do_BlockBegin (BlockBegin* x) {}
void NullCheckVisitor::do_Goto (Goto* x) {}
void NullCheckVisitor::do_If (If* x) {}
@ -1023,6 +1023,12 @@ void NullCheckEliminator::handle_AccessMonitor(AccessMonitor* x) {
void NullCheckEliminator::handle_Intrinsic(Intrinsic* x) {
if (!x->has_receiver()) {
if (x->id() == vmIntrinsics::_arraycopy) {
for (int i = 0; i < x->number_of_arguments(); i++) {
x->set_arg_needs_null_check(i, !set_contains(x->argument_at(i)));
}
}
// Be conservative
clear_last_explicit_null_check();
return;