C2 SuperWord: implement/improve subword reductions

XMLWordPrintable

    • Type: Enhancement
    • Resolution: Unresolved
    • Priority: P4
    • tbd
    • Affects Version/s: 27
    • Component/s: hotspot

      The following test shows that subword reductions don't vectorize.
      test/hotspot/jtreg/compiler/loopopts/superword/TestReductions.java

      After JDK-8342095, we may get vectorization, but only via cast to-and-from int. That's still suboptimal.

            Assignee:
            Unassigned
            Reporter:
            Emanuel Peter
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

              Created:
              Updated: