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  1. JDK
  2. JDK-8293993

C2: Check removal of Opaque2 nodes

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    • Enhancement
    • Resolution: Duplicate
    • P4
    • tbd
    • 20
    • hotspot

    Description

      During the investigation of JDK-8292088, the question was raised if Opaque2 nodes are really useful anymore today. A closer analysis suggested that they are not fulfilling their original purpose anymore. This RFE should investigate if Opaque2 nodes could be completely removed (together with reorg_offsets()) by backing it up with some benchmark results.

      We could re-investigate in a separate RFE if it is worth to re-implement reorg_offsets() in a way that fulfills its original purpose to lower register pressure.

      More detail can be found in the PR of JDK-8292088:
      https://github.com/openjdk/jdk/pull/10306

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              chagedorn Christian Hagedorn
              chagedorn Christian Hagedorn
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                Resolved: