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-rw-r--r--llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index c3b12997317..5ba7cbf9d73 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -443,7 +443,11 @@ class DwarfDebug {
ImportedEntityMap;
ImportedEntityMap ScopesWithImportedEntities;
- // Holder for types that are going to be extracted out into a type unit.
+ // Map from type MDNodes to a pair used as a union. If the pointer is
+ // non-null, proxy DIEs in CUs meant to reference this type should be stored
+ // in the vector. The hash will be added to these DIEs once it is computed. If
+ // the pointer is null, the hash is immediately available in the uint64_t and
+ // should be directly used for proxy DIEs.
DenseMap<const MDNode *, std::pair<uint64_t, SmallVectorImpl<DIE*>* > > TypeUnits;
// Whether to emit the pubnames/pubtypes sections.
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