Sergei Barannikov 6aeffcdb91 [TableGen] Add a backend generating SDNode descriptions (#123002) ...

This patch adds a simplistic backend that gathers all target-specific
SelectionDAG nodes and emits descriptions for most of them.

This includes generating node enumeration, node names, and information
about node "prototype" that can be used to verify that a node is valid.

The patch also extends SDNode by adding target-specific flags, which are
also included in the generated tables.

Part of #119709,
[RFC](https://discourse.llvm.org/t/rfc-tablegen-erating-sdnode-descriptions/83627).

Pull Request: https://github.com/llvm/llvm-project/pull/123002

2025-01-22 09:01:08 +03:00

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