\brief Patch Varnode inputs to p-code ops in split basic block Map Varnodes that are inputs for PcodeOps in the original basic block to the input slots of the cloned ops in the split block. Constants and code ref Varnodes need to be duplicated, other Varnodes are shared between the ops. This routine also pulls an input Varnode out of riginal MULTIEQUAL ops and adds it back to the cloned MULTIEQUA
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