1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/StackLifetime.cpp b/llvm/lib/Analysis/StackLifetime.cpp
index 34a7a04..b3f9994 100644
--- a/llvm/lib/Analysis/StackLifetime.cpp
+++ b/llvm/lib/Analysis/StackLifetime.cpp
@@ -63,7 +63,10 @@ bool StackLifetime::isAliveAfter(const AllocaInst *AI,
 // markers has the same size and points to the alloca start.
 static const AllocaInst *findMatchingAlloca(const IntrinsicInst &II,
                                             const DataLayout &DL) {
-  const AllocaInst *AI = cast<AllocaInst>(II.getArgOperand(1));
+  const AllocaInst *AI = dyn_cast<AllocaInst>(II.getArgOperand(1));
+  if (!AI)
+    return nullptr;
+
   auto AllocaSize = AI->getAllocationSize(DL);
   if (!AllocaSize)
     return nullptr;