1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index ed2dfa6906f..6eba00be00e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -1277,11 +1277,12 @@ TypeIndex CodeViewDebug::lowerTypeArray(const DICompositeType *Ty) {
            "codeview doesn't support subranges with lower bounds");
     int64_t Count = Subrange->getCount();
 
-    // Variable Length Array (VLA) has Count equal to '-1'.
-    // Replace with Count '1', assume it is the minimum VLA length.
+    // Variable length arrays and forward declarations of arrays without a size
+    // use a count of -1. Emit a count (and overall size) or zero in these cases
+    // to match what MSVC does for array declarations with no count.
     // FIXME: Make front-end support VLA subrange and emit LF_DIMVARLU.
     if (Count == -1)
-      Count = 1;
+      Count = 0;
 
     // Update the element size and element type index for subsequent subranges.
     ElementSize *= Count;