A dying substitutability call is transformed during igvn but the current logic fails to detect it's dead.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - whitespaces - more - test - fix Changes: https://git.openjdk.org/valhalla/pull/2467/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2467&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8385020 Stats: 119 lines in 2 files changed: 118 ins; 0 del; 1 mod Patch: https://git.openjdk.org/valhalla/pull/2467.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2467/head:pull/2467 PR: https://git.openjdk.org/valhalla/pull/2467
