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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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16
hotspot/src/share/vm/opto/memnode.cpp
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@ -2313,6 +2313,22 @@ Node *StoreCMNode::Identity( PhaseTransform *phase ) {
return this;
}
//=============================================================================
//------------------------------Ideal---------------------------------------
Node *StoreCMNode::Ideal(PhaseGVN *phase, bool can_reshape){
Node* progress = StoreNode::Ideal(phase, can_reshape);
if (progress != NULL) return progress;
Node* my_store = in(MemNode::OopStore);
if (my_store->is_MergeMem()) {
Node* mem = my_store->as_MergeMem()->memory_at(oop_alias_idx());
set_req(MemNode::OopStore, mem);
return this;
}
return NULL;
}
//------------------------------Value-----------------------------------------
const Type *StoreCMNode::Value( PhaseTransform *phase ) const {
// Either input is TOP ==> the result is TOP