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  1. JDK
  2. JDK-8340093

C2 SuperWord: implement cost model

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      This will improve the profitability of vectorizing reductions, and adding shuffle/pack/unpack operations.
      Because vectorization is not always profitable, especially if we add more operations to the loop.

      There may also be extra cost to subword conversion, see:
      https://github.com/openjdk/jdk/pull/23413

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        		 C2 SuperWord: refactor to make more vector nodes available in VectorNode::make Sub-task Resolved Emanuel Peter  

            epeter Emanuel Peter
            epeter Emanuel Peter
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