a0ef12c642
This commit adds extra checks to the MemRef argument materializations in the LLVM type converter. These materializations construct a `MemRefType`/`UnrankedMemRefType` from the unpacked elements of a MemRef descriptor or from a bare pointer. The extra checks ensure that the inputs to the materialization function are correct. It is possible that a user added extra type conversion rules that convert MemRef types in a different way and the extra checks ensure that we construct a MemRef descriptor only if the inputs are what we expect. This commit also drops a check around bare pointer materializations: ``` // This is a bare pointer. We allow bare pointers only for function entry // blocks. ``` This check should not be part of the materialization function. Whether a MemRef block argument is converted into a MemRef descriptor or a bare pointer is decided in the lowering pattern. At the point of time when materialization functions are executed, we already made that decision and we should just materialize regardless of the input format.
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