This patch updates and extends the TOSA-to-EmitC lowering test:
* Conversion/ConvertToEmitC/tosa.mlir
Summary of changes and rationale:
* Remove `buffer-alignment=0` from the lowering pipeline; it is not required
(the existing `CHECK` lines are not affected).
* Move the test from Conversion/ConvertToEmitC/tosa.mlir to
Dialect/EmitC/tosa/ops.mlir. Conversion tests are intended for single
conversion passes (e.g. `-convert-dialect1-to-dialect2`), whereas this test
exercises a more complex lowering pipeline with multiple explicit steps (e.g.
TOSA -> Linalg, bufferization, etc.).
* Add a Transform Dialect sequence to complement the existing lowering pipeline
definition. This introduces an additional `RUN` line that is compatible with
the original one. Using the Transform Dialect makes the pipeline easier to
document, maintain, and experiment with.
dd19a5a1a7