[13] RFR (T): 8217919: C2: Enable -XX:+AggressiveUnboxing by default

Vladimir Ivanov vladimir.x.ivanov at oracle.com
Thu Jan 31 19:16:14 UTC 2019


Once JDK-8217918 [1] is fixed, I propose to enable 
-XX:+AggressiveUnboxing by default.

The optimization noticeably improves EA for primitive boxes (e.g., 
JDK-8055340 [2]), so it's worth having it turned on. It'll also ensure 
the code won't rot again.

Testing: hs-precheckin-comp, tier1-5

Best regards,
Vladimir Ivanov

[1] https://bugs.openjdk.java.net/browse/JDK-8217918
[2] https://bugs.openjdk.java.net/browse/JDK-8055340

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