[X86] Do not emit two REX prefixes in Assembler::prefix

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    • Type: Backport
    • Resolution: Fixed
    • Priority: P5
    • 17.0.9-oracle
    • Affects Version/s: 11, 17, 20, 21
    • Component/s: hotspot
    • None
    • b01

          Assignee:
          Tobias Hartmann
          Reporter:
          Guoxiong Li
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            Created:
            Updated:
            Resolved: