[11u] RFR (S) 8230061: # assert(mode == ControlAroundStripMined && use == sfpt) failed: missed a node

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8230061

Patch applies to 11u cleanly, but does not compile, because RootNode is incomplete type, and so
comparisons of (Node*) == (RootNode*) fails. It does not fail in jdk/jdk, because JDK-8214862 had
added it. I opted to pick up the include separately, and marked JDK-8214862 for later backports.

11u webrev:
  https://cr.openjdk.java.net/~shade/8230061/webrev.11u.01/

Testing: new test (fails without fix, passes with it), tier1, tier2, ctw {c1, c2}

-- 
Thanks,
-Aleksey