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  1. JDK
  2. JDK-8288107

Auto-vectorization for integer min/max

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 19, 20
    • 20
    • hotspot
    • b07
    • generic
    • generic

    Description

      Math.min/max operations are not auto-vectorized by default for integers.
      C2 generates the cmp-csel instructions for Math.min/max but they can be auto-vectorized to generate the smin/smax instructions on aarch64, vpmaxsd/vpminsd on x86.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8290730 compiler/vectorization/TestAutoVecIntMinMax.java failed with "IRViolationException: There were one or multiple IR rule failures."

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8294816 C2: Math.min/max vectorization miscompilation

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Enhancement - null JDK-8290248 Implement MaxINode::Ideal transformation

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          links to

          Commit Commit openjdk/jdk/89458e36

          Review Review openjdk/jdk/9466

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              smonteith Stuart Monteith
              smonteith Stuart Monteith
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              Dates

                Created:
                Updated:
                Resolved: