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

[John Rose]

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