Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8155612

Aarch64: vector nodes need to support misaligned offset

    XMLWordPrintable

Details

    • Bug
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 9
    • 9
    • hotspot
    • None
    • b120
    • aarch64

    Backports

      Description

        When the superword optimization encounters a misaligned offset, it tries to align the loop induction variable so the memory access is aligned. So even though the aarch64 port only supports align vector memory accesses ( Matcher::misaligned_vectors_ok() return false), vector node can still get a misaligned offset which results in:

        # Internal Error (/scratch/rwestrel/hs-comp/hotspot/src/cpu/aarch64/vm/assembler_aarch64.hpp:251), pid=3780, tid=3807
        # guarantee(chk == -1 || chk == 0) failed: Field too big for insn

        Attachments

          Issue Links

            Activity

              People

                roland Roland Westrelin
                roland Roland Westrelin
                Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                  Created:
                  Updated:
                  Resolved: