Do now overflow while calulating upper bound for zero sized array.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@79043 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index ee2a940..6547434 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -722,8 +722,9 @@
QualType EltTy(Ty, 0);
while ((Ty = dyn_cast<ArrayType>(EltTy))) {
uint64_t Upper = 0;
- if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
- Upper = CAT->getSize().getZExtValue() - 1;
+ if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
+ if (CAT->getSize().getZExtValue())
+ Upper = CAT->getSize().getZExtValue() - 1;
// FIXME: Verify this is right for VLAs.
Subscripts.push_back(DebugFactory.GetOrCreateSubrange(0, Upper));
EltTy = Ty->getElementType();