Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8269878

Handle redundant reg-2-reg moves in X86 backend

    XMLWordPrintable

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 17, 18
    • Fix Version/s: 18
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b06
    • CPU:
      x86

      Description

      - Following instruction patterns emit extra redundant register to register moves.
          MoveF2VL
          MoveF2LEG
          MoveVL2F
          MoveLEG2F
          MoveD2VL
          MoveD2LEG
          MoveVL2D
          MoveLEG2D
      - Register allocator is capable of constraining the register mask of DEF operand based on the register mask back propagated from USE operand.

        Attachments

          Issue Links

            Activity

              People

              Assignee:
              jbhateja Jatin Bhateja
              Reporter:
              jbhateja Jatin Bhateja
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: