Further optimizations are possible for x64 narrow Klass decoding

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    • Type: Enhancement
    • Resolution: Unresolved
    • Priority: P4
    • tbd
    • Affects Version/s: None
    • Component/s: hotspot

      <merykitty>

      If we can reserve the base in the low 2G then this could be optimized further to addq(r, CompressedKlassPointers::base()) and if LogKlassAlignmentInBytes is 8 (as asserted in decode_and_move_klass_not_null below), we can shorten the whole sequence into leaq(r, Address(noreg, r, Address::times_8, CompressedKlassPointers::base())

      </merykitty>

            Assignee:
            Thomas Stuefe
            Reporter:
            Thomas Stuefe
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              Created:
              Updated: