[9] RFR (XS): 8087218: Constant fold loads from final instance fields in VM anonymous classes

Vladimir Ivanov vladimir.x.ivanov at oracle.com
Tue Jun 16 10:26:10 UTC 2015

Thanks for review, John.

Best regards,
Vladimir Ivanov

On 6/15/15 11:26 PM, John Rose wrote:
> Reviewed.  I see the bug is linked properly to the more general bug.  Thanks!  — John
> On Jun 15, 2015, at 6:15 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
>> http://cr.openjdk.java.net/~vlivanov/8087218/webrev.00
>> https://bugs.openjdk.java.net/browse/JDK-8087218
>> Right now, VM doesn't constant fold loads final instance fields unless an experimental flag -XX:+TrustFinalNonStaticFields is turned on.
>> The only exception is classes in java.lang.invoke/sun.invoke packages.
>> It can be extended to VM anonymous classes because there is no hacking of finals going on with them:
>>   (1) they are part of private API (sun.misc.Unsafe);
>>   (2) they can't be serialized.
>> Testing: manual (verified in generated code that constant folding happens)
>> Thanks!
>> Best regards,
>> Vladimir Ivanov

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