The code and the comment don't agree on how the counters are updated.
See thread on hotspot-compiler-dev:
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-August/024105.html
See thread on hotspot-compiler-dev:
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-August/024105.html