Request for reviews (s): 6623167: C2 crashed in StoreCMNode::Value

[Vladimir Kozlov]

http://webrev.invokedynamic.info/kvn/6623167/index.html

Fixed 6623167: C2 crashed in StoreCMNode::Value

Problem:
C2 crashed in StoreCMNode::Value since in(MemNode::OopStore) is 0.
The node, it seems, is dead since it's inputs are

control(0),mem(top),adr(0),val(0),oopst(0)

Solution:
Check memory and other inputs first.

Note: it is the fix from HS10 and HS11.

Reviewed by:
Fix verified (y/n): y

Other testing:
JPRT