Data Reshaping Restrictions/1

• The DISTRIBUTE_RESHAPE directive declares that the program makes no assumptions about the storage lay out of the array

• Array reshaping is legal only under certain conditions :

  • an array can be declared with only one of these options
    • default (no (re-)shaping)
    • distribute
    • distribute_reshape
    • it will keep the declared attribute for the duration of the program
  • reshaped array cannot be re-distributed
  • a reshaped array cannot be equivalenced to another array
    • explicitly through an equivalence statment
    • implicitly through multiple declarations of a common block
  • if an array in a common block is reshaped, all declarations of that common block must:
    • contain an array at the same offset within the common block
    • declare that array with the same number of dimensions and same size
    • specify the same reshaped distribution for the array

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