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It must generate Fortran77(90) + Message Passing code or possibly in one pass map HPF code onto parallel machine code
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Traditional dataflow and dependency analysis is especially critical in Fortran77 parts of code
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It must use data mapping assertions to decide what is stored where and so organize computation
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Code must be transformed to respect this owner-computes model
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It must typically use "Loosely Synchronous" model with communicate-compute phases and then compiler generates all the communication needed
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Due to latency issues compiler must minimize communication needed and maximize size of packets sent
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We need an excellent run-time library which the compiler invokes with parallel Intrinsics etc.
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