RFR: 8373508: C2: sinking CreateEx out of loop breaks the graph

[Dean Long]

On Tue, 16 Dec 2025 11:04:52 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> It's actually not clear to me what that logic in CreateExNode::Identity() is expected to do and I wonder if it's still needed.

I looked in the old SCCS history, and this code used to check if the call was to OptoRuntime::rethrow_stub(), so it appears to be trying to get the oop from arg0 to the rethrow runtime call.  This code looks obsolete and broken to me.

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PR Comment: https://git.openjdk.org/jdk/pull/28842#issuecomment-3664809085