RFR(S/T): 8230876: baseline cleanups from Async Monitor Deflation v2.0[789]

[Daniel D. Daugherty]

Greetings,

I have another round of baseline cleanup changes from the Async Monitor
Deflation project (8153224). Like previous sub-tasks of 8153224, these
changes are small and/or trivial. These changes have previously been
reviewed as a (very) small part of 8153224 (CR8/v2.08/11-for-jdk14).

Vladimir K., if you could sanity check the cleanups in 
macroAssembler_x86.cpp
that would be appreciated (only comments were changed). I recommend the
Udiff view...

Please see the bug for details about the changes in this webrev:

     JDK-8230876 baseline cleanups from Async Monitor Deflation v2.0[789]
     https://bugs.openjdk.java.net/browse/JDK-8230876

Here's the webrev URL:

     http://cr.openjdk.java.net/~dcubed/8230876-webrev/0-for-jdk14/

These changes have been included in my recent rounds of Mach5 Tier[1-8]
and other associated stress and/or performance testing. I have also done
a Mach5 Tier[1-3] run with just this patch to make sure that I got all
the pieces that are needed.

Thanks, in advance, for any comments, questions or suggestions.

Dan