9f302ed0cf
This patch generalizes the code for hlfir.cshift to be applicable for hlfir.eoshift. The major difference is the selection of the boundary value that might be statically/dynamically absent, in which case the default scalar value has to be used. The scalar value of the boundary is always computed before the hlfir.elemental or the assignment loop. Contrary to hlfir.cshift simplication, the SHIFT value is not normalized, because the original value (and its sign) participate in the EOSHIFT index computation for addressing the input array and selecting which elements of the results are assigned from the boundary operand.
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