[PATCH] D83047: [LiveDebugValues] 2/4 Add instruction-referencing LiveDebugValues implementation

[Jeremy Morse via Phabricator via llvm-commits]

jmorse created this revision.
jmorse added reviewers: aprantl, vsk, probinson, Orlando, StephenTozer, TWeaver, djtodoro.
Herald added subscribers: llvm-commits, mgrang, hiraditya, mgorny.
Herald added a project: LLVM.
jmorse added a parent revision: D83046: [LiveDebugValues] 1/4 Install an implementation-picking LiveDebugValues pass.

(Context: this thread http://lists.llvm.org/pipermail/llvm-dev/2020-June/142368.html )

This patch imports the instruction-referencing implementation of LiveDebugValues from the linked RFC, and adds it to the build system, but doesn't make it accessible at runtime yet -- that's the next patch.

The linked RFC contains the rationale behind this new implementation; the file comment provides a high level summary of the algorithm(s) behind it. This isn't an incremental change, so I'm not sure what the review criteria are, but at the very least I guess this needs to meet the code guidelines and be documented.

(This matches 1a20684b66339 on my public-github work, plus a few comment cleanups).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83047

Files:
  llvm/lib/CodeGen/CMakeLists.txt
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
  llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.h

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