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7174510: 19 JCK compiler tests fail with C2 error: memNode.cpp:812 - ShouldNotReachHere

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Add missing check for EncodeP node in MemNode::Ideal_common_DU_postCCP() method.

Reviewed-by: twisti
This commit is contained in:
Vladimir Kozlov 2012-06-11 14:58:51 -07:00
parent a23aa66098
commit ae6d0d30f5
1 changed files with 16 additions and 0 deletions
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16
hotspot/src/share/vm/opto/memnode.cpp
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@ -717,6 +717,22 @@ Node *MemNode::Ideal_common_DU_postCCP( PhaseCCP *ccp, Node* n, Node* adr ) {
adr = adr->in(1);
continue;
case Op_EncodeP:
// EncodeP node's control edge could be set by this method
// when EncodeP node depends on CastPP node.
//
// Use its control edge for memory op because EncodeP may go away
// later when it is folded with following or preceding DecodeN node.
if (adr->in(0) == NULL) {
// Keep looking for cast nodes.
adr = adr->in(1);
continue;
}
ccp->hash_delete(n);
n->set_req(MemNode::Control, adr->in(0));
ccp->hash_insert(n);
return n;
case Op_CastPP:
// If the CastPP is useless, just peek on through it.
if( ccp->type(adr) == ccp->type(adr->in(1)) ) {