[9] RFR (XS): 8072428: Enable UseLoopCounter ergonomically if on-stack-replacement is enabled

[Zoltán Majó]

Hi,


please review the patch for 8072428.

https://bugs.openjdk.java.net/browse/JDK-8072428

Problem: On-stack-replacement requires loop counters; disabling loop 
counters with on-stack-replacement enabled triggers an assert.

Solution: Set UseLoopCounter ergonomically if on-stack-replacement is 
enabled. Print warning.

Webrev:
http://cr.openjdk.java.net/~zmajo/8072428/webrev.00/

Tested with locally-built VM (linux_x64).

Thank you!

Best regards,


Zoltan