[PATCH] D20414: IR: Allow multiple global metadata attachments with the same type.

[Peter Collingbourne via llvm-commits]

pcc created this revision.
pcc added reviewers: aprantl, dexonsmith, dblaikie.
pcc added a subscriber: llvm-commits.

This will be necessary to allow the global merge pass to attach
multiple debug info metdata nodes to global variables once we reverse
the edge from DIGlobalVariable to GlobalVariable.

http://reviews.llvm.org/D20414

Files:
  include/llvm/IR/GlobalObject.h
  lib/AsmParser/LLParser.cpp
  lib/Bitcode/Reader/BitcodeReader.cpp
  lib/Bitcode/Writer/ValueEnumerator.cpp
  lib/IR/LLVMContextImpl.h
  lib/IR/Metadata.cpp
  lib/IR/Verifier.cpp
  lib/Transforms/Utils/CloneFunction.cpp
  lib/Transforms/Utils/ValueMapper.cpp
  test/Assembler/metadata.ll
  test/Verifier/metadata-function-dbg.ll
  unittests/IR/MetadataTest.cpp

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