MLIR Mapping

[Tikipiou]

Description

This pull request introduces the first version of the tools for mapping MLIR components to Graph components, as introduced in #40.

The primary components included in this pull request are:

• MLIRMapper.cpp: This class maps MLIR components to Graph components.
• GraphParser.cpp: This updates the parser to handle .mlir files, converting them into MLIR components and then invoking the MLIR mapper.

What’s new

• MLIRMapper class

Testing

• Verified the functionality and accuracy of parsed data by testing with sample .mlir files.

[lucas-rami]

I made a couple changes myself for the sake of time (and considering that I took long to check out the code, sorry!). Big ones detailed below:

• I replaced the new port-index-fixing magic with the updated one from DOTPrinter.cpp.
• I removed the new's for the graph nodes and edges, which were not necessary since the Graph stores raw nodes and edges as opposed to pointers to them i.e. it "owns" its data. Besides, since they were never deleted they were causing memory leaks.

There are a couple things in this code we will for sure go back to and change, but I merge this as is nonetheless since

1. these are things that are prompted by recent changed on main which I didn't tell you about for simplicity (e.g., we now have a much much better way of naming operations across passes in the form of dynamatic::NamingAnalysis, which makes the current "count-per-operation-type naming system" unnecessary), and
2. I'm not yet completely sure of how this is going to tie in to the rest of the visualizer so I don't want to make you iterate on code I'm not sure will be useful/relevant in the near future. This is a good base to start on, so it will do!