[jdk24] RFR: 8347554: [BACKOUT] C2: implement optimization for series of Add of unique value

Mon Jan 13 15:17:02 UTC 2025

Hi all,

This pull request contains a backport of commit [062f2dcf](https://github.com/openjdk/jdk/commit/062f2dcfe5b62cc3dd3c292eeebd7a7ac78f849a) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Christian Hagedorn on 13 Jan 2025 and was reviewed by Tobias Hartmann.

Thanks!

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Commit messages:
 - Backport 062f2dcfe5b62cc3dd3c292eeebd7a7ac78f849a

Changes: https://git.openjdk.org/jdk/pull/23077/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23077&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347554
  Stats: 414 lines in 3 files changed: 0 ins; 414 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/23077.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23077/head:pull/23077

PR: https://git.openjdk.org/jdk/pull/23077