[PATCH] D126929: Add sanitizer metadata attributes to clang IR gen.

[Mitch Phillips via Phabricator via cfe-commits]

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This patch adds generation of sanitizer metadata attributes (which were
added in D126100 <https://reviews.llvm.org/D126100>) to the clang frontend.

We still currently generate the `llvm.asan.globals` that's consumed by
the IR pass, but the plan is to eventually migrate off of that onto
purely debuginfo and these IR attributes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126929

Files:
  clang/lib/CodeGen/CGDecl.cpp
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/CodeGen/SanitizerMetadata.cpp
  clang/lib/CodeGen/SanitizerMetadata.h
  clang/test/CodeGen/asan-globals.cpp
  clang/test/CodeGen/sanitize-init-order.cpp

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