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  1. JDK
  2. JDK-8289943

Simplify some object allocation merges

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      C2 Scalar Replacement implementation doesn't scalar replace allocation merges. There are some common cases where such merges can be scalar replaced if we first replace the Phi node that merges the allocations by a temporary node and then scalar replacing the Phi inputs in turn.

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              cslucas Cesar Soares
              cslucas Cesar Soares
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