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6982533: Crash in ~StubRoutines::jbyte_fill with AggressiveOpts enabled

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2010-09-07 11:31:27 -07:00
parent 34b016cb42
commit cf8bea660b
1 changed files with 10 additions and 0 deletions
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10
hotspot/src/share/vm/opto/loopTransform.cpp
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@ -2417,6 +2417,8 @@ bool PhaseIdealLoop::match_fill_loop(IdealLoopTree* lpt, Node*& store, Node*& st
Node* value = n->in(MemNode::ValueIn);
if (!lpt->is_invariant(value)) {
msg = "variant store value";
} else if (!_igvn.type(n->in(MemNode::Address))->isa_aryptr()) {
msg = "not array address";
}
store = n;
store_value = value;
@ -2468,6 +2470,7 @@ bool PhaseIdealLoop::match_fill_loop(IdealLoopTree* lpt, Node*& store, Node*& st
// head->phi * elsize + con. head->phi might have a ConvI2L.
Node* elements[4];
Node* conv = NULL;
bool found_index = false;
int count = store->in(MemNode::Address)->as_AddP()->unpack_offsets(elements, ARRAY_SIZE(elements));
for (int e = 0; e < count; e++) {
Node* n = elements[e];
@ -2484,17 +2487,20 @@ bool PhaseIdealLoop::match_fill_loop(IdealLoopTree* lpt, Node*& store, Node*& st
if (value != head->phi()) {
msg = "unhandled shift in address";
} else {
found_index = true;
shift = n;
assert(type2aelembytes(store->as_Mem()->memory_type(), true) == 1 << shift->in(2)->get_int(), "scale should match");
}
} else if (n->Opcode() == Op_ConvI2L && conv == NULL) {
if (n->in(1) == head->phi()) {
found_index = true;
conv = n;
} else {
msg = "unhandled input to ConvI2L";
}
} else if (n == head->phi()) {
// no shift, check below for allowed cases
found_index = true;
} else {
msg = "unhandled node in address";
msg_node = n;
@ -2506,6 +2512,10 @@ bool PhaseIdealLoop::match_fill_loop(IdealLoopTree* lpt, Node*& store, Node*& st
msg_node = store;
}
if (!found_index) {
msg = "missing use of index";
}
// byte sized items won't have a shift
if (msg == NULL && shift == NULL && t != T_BYTE && t != T_BOOLEAN) {
msg = "can't find shift";