This changes adds patterns to resolve the base pointer, offset, sizes
and strides of the result of a `memref.get_global` operation. Since
the operation can only result in static shaped memrefs, current
resolution kicks in only for non-zero offsets, and identity strides.
Also
- Add a separate `populateResolveExtractStridedMetadata` method that
adds just the pattern to resolve `<memref op>` ->
`memref.extract_strided_metadata` operations.
- Refactor the `SubviewFolder` pattern to allow resolving
`memref.subview` -> `memref.extract_strided_metadata`.
This allows using these patterns for cases where there are already
existing `memref.extract_strided_metadata` operations.
Reviewed By: qcolombet
Differential Revision: https://reviews.llvm.org/D147393
0a8d1ee739