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6920346: G1: "must avoid base_memory and AliasIdxTop"

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2010-01-28 16:28:28 -08:00
parent 6e4af7581c
commit 0b2600abcd
1 changed files with 14 additions and 1 deletions
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15
hotspot/src/share/vm/opto/memnode.hpp
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@ -583,9 +583,22 @@ public:
// Preceeding equivalent StoreCMs may be eliminated.
class StoreCMNode : public StoreNode {
private:
virtual uint hash() const { return StoreNode::hash() + _oop_alias_idx; }
virtual uint cmp( const Node &n ) const {
return _oop_alias_idx == ((StoreCMNode&)n)._oop_alias_idx
&& StoreNode::cmp(n);
}
virtual uint size_of() const { return sizeof(*this); }
int _oop_alias_idx; // The alias_idx of OopStore
public:
StoreCMNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, int oop_alias_idx ) : StoreNode(c,mem,adr,at,val,oop_store), _oop_alias_idx(oop_alias_idx) {}
StoreCMNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, int oop_alias_idx ) :
StoreNode(c,mem,adr,at,val,oop_store),
_oop_alias_idx(oop_alias_idx) {
assert(_oop_alias_idx >= Compile::AliasIdxRaw ||
_oop_alias_idx == Compile::AliasIdxBot && Compile::current()->AliasLevel() == 0,
"bad oop alias idx");
}
virtual int Opcode() const;
virtual Node *Identity( PhaseTransform *phase );
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);