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  1. JDK
  2. JDK-8284960 Integration of JEP 426: Vector API (Fourth Incubator)
  3. JDK-8285281

[x86] Add C2 mid-end and back-end implementation for COMPRESS_BITS and EXPAND_BITS operations

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      - Intrinsify scalar following operation
          Integer.compress
          Integer.expand
          Long.compress
          Long.expand

      - Add C2 IR nodes and corresponding ideal transformations for new operations.

      - Use X86 parallel bit extraction and deposition instruction to emit efficient JIT sequence.

            jbhateja Jatin Bhateja
            jbhateja Jatin Bhateja
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