[lworld] Integrated: 8376702: [lworld] MemNode::optimize_simple_memory_chain asserts with "invalid node class: Con"

[Quan Anh Mai]

On Mon, 2 Feb 2026 17:52:09 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

> Hi,
> 
> I cannot manage to reproduce the issue, and it seems to fail only once in our CI. From the log, it seems that the issue is due to the fact that the pointer input to the `Load` is a `Proj` but its input dies, so the cast `as_Multi` in `try_optimize_strict_final_load_memory` fails. I can see a similar check in `MemNode::optimize_simple_memory_chain`. As a result, it is reasonable to just return the top here.
> 
> Please take a look and leave your review, thanks a lot.

This pull request has now been integrated.

Changeset: c09d99d2
Author:    Quan Anh Mai <qamai at openjdk.org>
URL:       https://git.openjdk.org/valhalla/commit/c09d99d2f3d9804eba0b712cfd3c457106f97882
Stats:     9 lines in 2 files changed: 3 ins; 3 del; 3 mod

8376702: [lworld] MemNode::optimize_simple_memory_chain asserts with "invalid node class: Con"

Reviewed-by: thartmann

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PR: https://git.openjdk.org/valhalla/pull/2016