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8256046: Shenandoah: Mix-in NULL_PTR in non-strong ShLRBNode's type

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Reviewed-by: roland, shade
This commit is contained in:
Roman Kennke 2020-11-10 15:25:44 +00:00
parent a1d4b9f35b
commit 97d6e4aed7
1 changed files with 11 additions and 3 deletions

14
src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp

@ -2945,7 +2945,12 @@ const Type* ShenandoahLoadReferenceBarrierNode::bottom_type() const {
if (t == TypePtr::NULL_PTR) {
return t;
}
return t->is_oopptr();
if (kind() == ShenandoahBarrierSet::AccessKind::NORMAL) {
return t;
}
return t->meet(TypePtr::NULL_PTR);
}
const Type* ShenandoahLoadReferenceBarrierNode::Value(PhaseGVN* phase) const {
@ -2957,8 +2962,11 @@ const Type* ShenandoahLoadReferenceBarrierNode::Value(PhaseGVN* phase) const {
return t2;
}
const Type* type = t2->is_oopptr();
return type;
if (kind() == ShenandoahBarrierSet::AccessKind::NORMAL) {
return t2;
}
return t2->meet(TypePtr::NULL_PTR);
}
Node* ShenandoahLoadReferenceBarrierNode::Identity(PhaseGVN* phase) {