[8u] RFA for backport of 8168318: PPC64: Use cmpldi instead of li/cmpld

[Gustavo Romero]

Hi,

Could the following backport be approved please?

It's a PPC64-only change and applies cleanly.

An improvement of ~1% was observed on some Neo4j benchmarks.

The original author, Igor, was from Eldorado organization which has already
signed the OCA [1] accordingly.

Bug		: https://bugs.openjdk.java.net/browse/JDK-8168318
Changeset	: http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/622d3fe587f2
Review thread	: http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-October/024771.html

Thank you and best regards,
Gustavo

[1] http://www.oracle.com/technetwork/community/oca-486395.html "Instituto de Pesquisas Eldorado - OpenJDK"