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-rw-r--r--llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index 730337195b0..e3205466a2e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -627,6 +627,8 @@ static bool isUnsignedDIType(DwarfDebug *DD, DIType Ty) {
dwarf::Tag T = (dwarf::Tag)Ty.getTag();
// Encode pointer constants as unsigned bytes. This is used at least for
// null pointer constant emission.
+ // (Pieces of) aggregate types that get hacked apart by SROA may also be
+ // represented by a constant. Encode them as unsigned bytes.
// FIXME: reference and rvalue_reference /probably/ shouldn't be allowed
// here, but accept them for now due to a bug in SROA producing bogus
// dbg.values.
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