[8u] request for approval: "8162384: Performance regression: bimorphic inlining may be bypassed by type speculation"

[Roland Westrelin]

(resending as I wasn't on jdk8u-dev when I sent this before)

Hi,

I'd like to backport 8162384 to 8u as it's an issue reported by one of
our (Red Hat) customers. The patch applies cleanly. It was pushed to
jdk9 3 weeks ago and hasn't caused any follow up bugs that I know of.

https://bugs.openjdk.java.net/browse/JDK-8162384
http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/e9f9f6ffc351

8u webrev:

http://cr.openjdk.java.net/~roland/8162384.8u/webrev.00/

Roland.