RFR: 8367627: C2: Missed Ideal() optimization opportunity with MemBar [v3]

[Christian Hagedorn]

On Mon, 5 Jan 2026 08:59:24 GMT, Benoît Maillard <bmaillard at openjdk.org> wrote:

>> Suggestion:
>> 
>>  * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
>> 
>> 
>> You are probably also the first one this year to change `node.cpp` and `graphKit.cpp`, so we need an update there as well.
>
> @chhagedorn I filed [JDK-8374511](https://bugs.openjdk.org/browse/JDK-8374511)

> You are probably also the first one this year to change node.cpp and graphKit.cpp, so we need an update there as well.

Can you double-check if you also need to update those with latest master?

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PR Review Comment: https://git.openjdk.org/jdk/pull/28448#discussion_r2661187908