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

[Vladimir Kozlov]

Agree.

Thanks,
Vladimir

On 1/31/19 11:16 AM, Vladimir Ivanov wrote:
> http://cr.openjdk.java.net/~vlivanov/8217919/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8217919
> 
> 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