hg: jdk/sandbox: 8208275: C2 crash in Node::add_req(Node*)

[chris.hegarty at oracle.com]

Changeset: e2ced90cbd36
Author:    thartmann
Date:      2018-08-17 08:21 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e2ced90cbd36

8208275: C2 crash in Node::add_req(Node*)
Summary: Split-if optimization should not process (dead) counted loops.
Reviewed-by: roland

! src/hotspot/share/opto/ifnode.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestOneIterationStripMined.java