dca74f794a
Reverts #140730 - that turned out not to be an NFC as we originally thought. See the attached test for an example. Many thanks to @Garra1980 for reporting! Note, without this change, the newly added test would be incorrectly converted to: ```mlir func.func @view_memref_as_rank0(%arg0: index, %arg1: memref<2xi8>) { %0 = llvm.mlir.poison : !llvm.struct<(ptr, ptr, i64)> return } ```