RFR: JDK-8316756: C2 EA fails with "missing memory path" when encountering unsafe_arraycopy stub call

[Vladimir Ivanov]

On Thu, 11 Jan 2024 17:59:59 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Flag setting (StoreB nodes) in JavaThread::_doing_unsafe_access is also not affected but it is volatile field and these stores should be staying where they are. They can't go up or down.

In a private discussion with @tobiasholenstein, I proposed to move those stores into the corresponding stub. It would complicate the implementation a bit (platform-specific vs cross-platform implementation), but simplify things on IR level.

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PR Comment: https://git.openjdk.org/jdk/pull/17347#issuecomment-1888131977