[PATCH] D150370: Introduce StructuredData

[Nicolai Hähnle via Phabricator via llvm-commits]

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StructuredData is a fairly general mechanism for representing extensible
data in textual IR and in bitcode.

It is intended primarily as an abstraction layer used during IR printing,
parsing and (bitcode de-)serialization.

However, it can also be used to preserve structured data as-is for
extension points in tools where a particular extension isn't understood.

Possible use cases range over:

- Encoding TargetTypeInfo -- this is the use case that initially triggered this development
- Extensible human-readable and compile-time efficient metadata a la debug info metadata
- Human-readable and compile-time efficient modifiers on extended instructions / intrinsics

This change already includes rudimentary printing and parsing support.
Bitcode reading and writing will follow in a subsequent change.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150370

Files:
  llvm/docs/LangRef.rst
  llvm/include/llvm/AsmParser/LLParser.h
  llvm/include/llvm/IR/StructuredData.h
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/IR/AsmWriter.cpp
  llvm/lib/IR/CMakeLists.txt
  llvm/lib/IR/StructuredData.cpp

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