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6877254: Server vm crashes with no branches off of store slice" when run with CMS and UseSuperWord(default)

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Design StoreCMNode::Ideal to promote its oopStore input if the input is a MergeMem node

Reviewed-by: kvn, never
This commit is contained in:
Changpeng Fang 2009-09-14 09:49:54 -07:00
parent e0519e7bbd
commit c492f4cde5
8 changed files with 86 additions and 14 deletions
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6
hotspot/src/share/vm/opto/memnode.hpp
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@ -582,12 +582,16 @@ public:
// The last StoreCM before a SafePoint must be preserved and occur after its "oop" store
// Preceeding equivalent StoreCMs may be eliminated.
class StoreCMNode : public StoreNode {
private:
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 ) : StoreNode(c,mem,adr,at,val,oop_store) {}
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) {}
virtual int Opcode() const;
virtual Node *Identity( PhaseTransform *phase );
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
virtual const Type *Value( PhaseTransform *phase ) const;
virtual BasicType memory_type() const { return T_VOID; } // unspecific
int oop_alias_idx() const { return _oop_alias_idx; }
};
//------------------------------LoadPLockedNode---------------------------------