--- a/hotspot/src/share/vm/opto/subnode.cpp Thu Feb 28 15:40:09 2008 -0800
+++ b/hotspot/src/share/vm/opto/subnode.cpp Fri Feb 29 09:57:18 2008 -0800
@@ -614,6 +614,13 @@
const TypeOopPtr* p0 = r0->isa_oopptr();
const TypeOopPtr* p1 = r1->isa_oopptr();
if (p0 && p1) {
+ Node* in1 = in(1)->uncast();
+ Node* in2 = in(2)->uncast();
+ AllocateNode* alloc1 = AllocateNode::Ideal_allocation(in1, NULL);
+ AllocateNode* alloc2 = AllocateNode::Ideal_allocation(in2, NULL);
+ if (MemNode::detect_ptr_independence(in1, alloc1, in2, alloc2, NULL)) {
+ return TypeInt::CC_GT; // different pointers
+ }
ciKlass* klass0 = p0->klass();
bool xklass0 = p0->klass_is_exact();
ciKlass* klass1 = p1->klass();