[REDO] C2: implement optimization for series of Add of unique value

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    • Type: Enhancement
    • Resolution: Fixed
    • Priority: P4
    • 26
    • Affects Version/s: 25
    • Component/s: hotspot
    • b20

      JDK-8325495 caused a regression and we decided to back it out for JDK 24 given that we are close to RDP 2 (JDK-8347554). Details about the regression can be found at the backout.

      This REDO is targeted to JDK 25.
      ---------
      Original RFE Description:

      I noticed this:
      ArithmeticCanonicalizationBenchmark
      in
      https://ionutbalosin.com/2024/02/jvm-performance-comparison-for-jdk-21/#jit-compiler

        1.
        		 [BACKOUT] C2: implement optimization for series of Add of unique value Sub-task Resolved Christian Hagedorn  

            Assignee:
            Kangcheng Xu
            Reporter:
            Christian Hagedorn
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              Created:
              Updated:
              Resolved: