[13] RFR(XS/M): 8226699 [BACKOUT] JDK-8221734 Deoptimize with handshakes

[Daniel D. Daugherty]

Greetings,

The Runtime team has decided to backout the following fix from JDK13:

     JDK-8221734 Deoptimize with handshakes
     https://bugs.openjdk.java.net/browse/JDK-8221734

in order to provide time to deal with the following regression in the
JDK14 time frame:

     JDK-8225351 assert failed: Revoke failed, unhandled biased lock state
     https://bugs.openjdk.java.net/browse/JDK-8225351

This is a backout of an 'M'-sized patch so it's 'XS' because it is a
backout that has been mechanically verified, but the numbers of lines
touched makes it an 'M'.

Here's the backout bug:

     JDK-8226699 [BACKOUT] JDK-8221734 Deoptimize with handshakes
     https://bugs.openjdk.java.net/browse/JDK-8226699

Here's the webrev:

http://cr.openjdk.java.net/~dcubed/8226699-webrev/0_for_jdk13/index.html

Here's the webrev for JDK-8221734:

     http://cr.openjdk.java.net/~rehn/8221734/v5/webrev/

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

Dan (and Robbin)