[llvm] [LLVM][MDL] First integration of MDL with LLVM (PR #78002)

[Aart Bik via llvm-commits]

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+# MDL: A Micro-Architecture Description Language for LLVM
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+November 2022                                   Reid Tatge        [tatge at google.com](mailto:tatge at google.com)
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+Updated January 2024
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+## **TL;DR:**
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+We’ve created a DSL and compiler for modeling micro-architecture that handles a very broad class of architectures - CPUs, GPUs, VLIWs, DSPs, ML accelerators, and embedded devices. This effort grew out of a need to quickly develop and experiment with high-quality compilers and tools to facilitate rapid architecture exploration. We named the DSL “MDL” for “Microarchitecture Description Language”.
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+While being significantly more expressive than TableGen’s Schedules and Itineraries used in LLVM, MDL is also more concise, and simpler to read and write while supporting a much broader class of embedded and accelerator architectures. We currently can automatically _generate _MDL descriptions for all upstream targets which are in many cases 1/10 the size of the equivalent TableGen descriptions.  We’ve integrated this with LLVM, and are sending out this RFC because we believe it could be valuable to the larger LLVM community. \
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aartbik wrote:

Remove the _ near generate and MDL or at least move the _ closer to generate if you wanted to emphasize just generate. Right now it does not format properly.

Also remove \ at end of paragraph

https://github.com/llvm/llvm-project/pull/78002