[mlir][Linalg] Create a named batch_matmul op and pipe it through.

This revision is the first in a set of improvements that aim at allowing
more generalized named Linalg op generation from a mathematical
specification.

This revision allows creating a new op and checks that the parser,
printer and verifier are hooked up properly.

This opened up a few design points that will be addressed in the future:
1. A named linalg op has a static region builder instead of an
explicitly parsed region. This is not currently compatible with
assemblyFormat so a custom parser / printer are needed.
2. The convention for structured ops and tensor return values needs to
evolve to allow tensor-land and buffer land specifications to agree
3. ReferenceIndexingMaps and referenceIterators will need to become
static to allow building attributes at parse time.
4. Error messages will be improved once we have 3. and we pretty print
in custom form.

Differential Revision: https://reviews.llvm.org/D78327

0 files changed, 0 insertions, 0 deletions