[PATCH] D92924: Add opaque Handle infrastructure

[Nicolai Hähnle via Phabricator via llvm-commits]

nhaehnle created this revision.
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This infrastructure is a foundation for writing some algorithms
generically without resorting to templates, by treating "references"
(usually pointers) to objects such as basic blocks as opaque handles.

Subsequent changes will add more mechanisms to facilitate working with
such handles, and introduce type-erased base classes in some places
(e.g. dominator trees) in terms of handles.

Change-Id: I79e69589e972e97335189f9558ebe44c7b00771b


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92924

Files:
  llvm/include/llvm/Support/Handle.h

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