Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8209420

Track membars for volatile accesses so they can be properly optimized

    Details

    • Subcomponent:
    • Resolved In Build:
      b09

      Backports

        Description

        Aarch64 emits a single instruction for volatile accesses that include the required memory barriers. For this to work properly the aarch64 backend has to locate membars that go with a memory access to elide them. This is currently implemented with some complicated pattern matching that has proven fragile and painful to maintain. This change introduces a new and robust logic to locate membars and memory accesses for volatile accesses.

          Attachments

            Issue Links

              Activity

                People

                • Assignee:
                  roland Roland Westrelin
                  Reporter:
                  roland Roland Westrelin
                • Votes:
                  0 Vote for this issue
                  Watchers:
                  5 Start watching this issue

                  Dates

                  • Created:
                    Updated:
                    Resolved: