IR: Allow multiple global metadata attachments with the same type.
This will be necessary to allow the global merge pass to attach
multiple debug info metadata nodes to global variables once we reverse
the edge from DIGlobalVariable to GlobalVariable.
Differential Revision: http://reviews.llvm.org/D20414
llvm-svn: 271358
diff --git a/llvm/lib/Transforms/Utils/ValueMapper.cpp b/llvm/lib/Transforms/Utils/ValueMapper.cpp
index d82f513..7b95ac0 100644
--- a/llvm/lib/Transforms/Utils/ValueMapper.cpp
+++ b/llvm/lib/Transforms/Utils/ValueMapper.cpp
@@ -950,8 +950,9 @@
// Remap the metadata attachments.
SmallVector<std::pair<unsigned, MDNode *>, 8> MDs;
F.getAllMetadata(MDs);
+ F.clearMetadata();
for (const auto &I : MDs)
- F.setMetadata(I.first, cast_or_null<MDNode>(mapMetadata(I.second)));
+ F.addMetadata(I.first, *cast<MDNode>(mapMetadata(I.second)));
// Remap the argument types.
if (TypeMapper)