There is code in CreateExNode::Identity that assumes in(1)->in(0) is a call and sometime tried to return arg0 of the call. This caused crashes that were worked around by 8373508, but the questionable code is still there. It looks like the code is really old and can be removed:
https://github.com/openjdk/jdk/pull/28842#issuecomment-3664809085
https://github.com/openjdk/jdk/pull/28842#issuecomment-3664809085
- relates to
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JDK-8373508 C2: sinking CreateEx out of loop breaks the graph
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- Resolved
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