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6676462: JVM sometimes would suddenly consume significant amount of memory

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Add asserts with dead loop checks in AddNode::Ideal().

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2008-09-05 13:33:55 -07:00
parent d1de009d84
commit 8174b8b497
1 changed files with 2 additions and 0 deletions
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2
hotspot/src/share/vm/opto/addnode.cpp
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@ -157,6 +157,7 @@ Node *AddNode::Ideal(PhaseGVN *phase, bool can_reshape) {
Node *a12 = add1->in(2);
const Type *t12 = phase->type( a12 );
if( t12->singleton() && t12 != Type::TOP && (add1 != add1->in(1)) ) {
assert(add1->in(1) != this, "dead loop in AddNode::Ideal");
add2 = add1->clone();
add2->set_req(2, in(2));
add2 = phase->transform(add2);
@ -173,6 +174,7 @@ Node *AddNode::Ideal(PhaseGVN *phase, bool can_reshape) {
Node *a22 = add2->in(2);
const Type *t22 = phase->type( a22 );
if( t22->singleton() && t22 != Type::TOP && (add2 != add2->in(1)) ) {
assert(add2->in(1) != this, "dead loop in AddNode::Ideal");
Node *addx = add2->clone();
addx->set_req(1, in(1));
addx->set_req(2, add2->in(1));