RFR(XS): 8146999: hotspot/test/compiler/c2/8007294/Test8007294.java test nightly failure

[Vladimir Kozlov]

Looks good.

Thanks,
Vladimir

On 1/18/16 12:39 PM, Roland Westrelin wrote:
>> http://cr.openjdk.java.net/~roland/8146999/webrev.00/
>
> Further testing revealed this bug was hiding another one.
>
> http://cr.openjdk.java.net/~roland/8146999/webrev.01/
>
> In PhiNode::unique_input(), uncast() could step over the CheckCastPP node that follows an Allocation. If that happens, a new CheckCastPP will be created and will replace the CheckCastPP of the allocation but with a different control and it could cause a safepoint to be in between the allocation and the CheckCastPP and assert failures with "there should be a oop in OopMap instead of a live raw oop at safepoint”.
>
> Roland.
>