[PATCH] D127911: Delete 'llvm.asan.globals' for global metadata.

[Mitch Phillips via Phabricator via cfe-commits]

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Now that we have the sanitizer metadata that is actually on the global
variable, and now that we use debuginfo in order to do symbolization of
globals, we can delete the 'llvm.asan.globals' IR synthesis.

This patch deletes the 'location' part of the __asan_global that's
embedded in the binary as well, because it's unnecessary. This saves
about ~0.275% of the optimised clang binary.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D127911

Files:
  clang/lib/CodeGen/BackendUtil.cpp
  clang/lib/CodeGen/SanitizerMetadata.cpp
  clang/lib/CodeGen/SanitizerMetadata.h
  clang/test/CodeGen/asan-globals.cpp
  clang/test/CodeGen/hwasan-globals.cpp
  clang/test/CodeGen/memtag-globals.cpp
  clang/test/CodeGen/sanitize-init-order.cpp
  compiler-rt/test/asan/TestCases/global-location.cpp
  llvm/include/llvm/Transforms/Instrumentation/AddressSanitizer.h
  llvm/lib/Passes/PassRegistry.def
  llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
  llvm/test/Instrumentation/AddressSanitizer/global_metadata.ll
  llvm/test/Instrumentation/AddressSanitizer/global_metadata_array.ll
  llvm/test/Instrumentation/AddressSanitizer/global_with_comdat.ll
  llvm/test/Instrumentation/AddressSanitizer/instrument_global.ll
  llvm/test/Instrumentation/AddressSanitizer/instrument_initializer_metadata.ll
  llvm/test/Instrumentation/AddressSanitizer/win-string-literal.ll
  llvm/test/Instrumentation/SanitizerCoverage/tracing-comdat.ll
  llvm/tools/opt/NewPMDriver.cpp

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