[jdk16] RFR: 8260284: C2: assert(_base == Int) failed: Not an Int

[Christian Hagedorn]

On Fri, 22 Jan 2021 17:39:26 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> `PhaseIterGVN::no_dependent_zero_check()` does not handle the case when the divisor `n->in(2)` is top when a Div/Mod node is dying. As a result, we hit the assertion in `is_int()` because the type is top.
>> 
>> The fix is straight forward to handle this case and just return false to avoid any further redundant optimization on a dead node.
>> 
>> Thanks,
>> Christian
>
> Good.

Thanks Vladimir for your review!

-------------

PR: https://git.openjdk.java.net/jdk16/pull/129