8379129: C2 crash in LoadNode::can_split_through_phi_base during Escape Analysis (JDK 25.0.1+8)

[anton-seoane]

This PR fixes a null pointer dereference crash in C2 during escape analysis.

Testing: tiers 1-4, compiler stress tests

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Progress

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Issue

• JDK-8379129: C2 crash in LoadNode::can_split_through_phi_base during Escape Analysis (JDK 25.0.1+8) (Bug - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/30620/head:pull/30620
$ git checkout pull/30620

Update a local copy of the PR:
$ git checkout pull/30620
$ git pull https://git.openjdk.org/jdk.git pull/30620/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 30620

View PR using the GUI difftool:
$ git pr show -t 30620

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/30620.diff

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