RFA: 8168996: C2 crash at postaloc.cpp:140 : assert(false) failed: unexpected yanked node
adinn at redhat.com
Mon Jan 11 09:46:00 UTC 2021
On 11/01/2021 06:29, Yangfei (Felix) wrote:
> Sorry, I should have mentioned more details about the diagnosis for
> 8u in my previous mail.
> . . .
> With that we managed to get the C2 graph after "Optimized finished"
> phase. The subgraph looks like:
> LoadN --> DecodeN --> MemBarAcquire
> Here, the MemBarAcquire node from a volatile object field was keeping
> the otherwise dead LoadN nodes alive. But we don't have a Phi in
> between. This is slight different with the C2 graph in the original
> RFR thread. I think this does not affect the application of the
> original fix. Is this enough to validate the 8u backport?
That's more than enough to approve this as the right fix for the right
Nice work ;-)
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