RFR(L): 8005071: Incremental inlining for JSR 292

[Roland Westrelin]

Here is a new webrev:

http://cr.openjdk.java.net/~roland/8005071/webrev.02/

with Vladimir & John's suggestions. I also limited the MaxNodeLimit bump to 75000 which seems to be sufficient according my latest experiments and in RegionNode::try_clean_mem_phi() I dropped the, I believe, unnecessary check for in(i)->outcnt() on the branch that doesn't have the MergeMem.

Roland.