Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8280003

C1: Reconsider uses of logical_and immediates in LIRGenerator::do_getObjectSize

    XMLWordPrintable

Details

    • b21

    Description

      JDK-8253525 added uses of `logical_and` with long/int constants without protecting them with `load_immediate`. This was proven to be a problem at least on ARM32, see JDK-8279301. We should reconsider how `logical_and` is used in that new code.

      Draft PR: https://github.com/openjdk/jdk/pull/7080

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-8279301 c1 getObjectSize intrinsic should guard round mask constant

          • P3 - Major loss of function.
          • Closed
          is blocked by

          Enhancement - null JDK-8280166 Extend java/lang/instrument/GetObjectSizeIntrinsicsTest.java test cases

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

          Enhancement - null JDK-8253525 Implement getInstanceSize/sizeOf intrinsics

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

          Commit Commit openjdk/jdk/7b7207a4

          Review Review openjdk/jdk/7080

          Activity

            People

              shade Aleksey Shipilev
              shade Aleksey Shipilev
              Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: