IMEX needs a CLI tool similar to mlir-opt

[diptorupd]

The mlir-opt tool makes it easy to run any MLIR pass using a default global registry. The tool is useful to design FileCheck test cases.

IMEX needs a similar tool. The following pieces need to be put in place before the tool can be put together:

• Add a Passes.td and Passes.h to our Conversion folder. These two files are provided by the MLIR repo and are used to define the registration functions for all Conversion passes.
• Add Passes.td and Passes.h to all IMEX Dialect that define passes.
• Add an InitIMEXDialects.h header similar to the InitAllDialects.h in MLIR.
• Add an InitIMEXPasses.h header similar to InitAllPasses.h in MLIR.
• Add an imex-opt.cpp source similar to mlir-opt.cpp

Explore automation possibilities to auto-generate these files as most of the files will need mechanical maintenance.

PS: The automation scripts in our repo are meta^2 programming. Use Python to generate TableGen that then generates C++. Ergo, Python rules them all!!

[silee2]

I was thinking about doing the same thing at some point. Thanks for starting the effort.

[fschlimb]

The stub generation and the overall Pass infrastructure is in place (including instructions for adding new stuff in README.md).

[diptorupd]

The tool is now available in refactor branch.