[PATCH] D145994: WIP

[Nick Desaulniers via Phabricator via llvm-commits]

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Rather than have a "srcloc" associated with each call of dontcall-warn
or dontcall-error attributed function, we could reuse the existing
DILocation metadata (if it's emitted).

TODO: child commit that converts to emitting such DILocations.
TODO: remove mention of srcloc from langref.
TODO: update tests.
TODO: make clang stop emitting srcloc.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D145994

Files:
  clang/include/clang/Basic/CodeGenOptions.def
  clang/include/clang/Basic/DiagnosticFrontendKinds.td
  clang/lib/CodeGen/CodeGenAction.cpp
  llvm/include/llvm/IR/DiagnosticInfo.h
  llvm/lib/IR/DiagnosticInfo.cpp

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