diff --git a/gnu/llvm/llvm/lib/CodeGen/SafeStack.cpp b/gnu/llvm/llvm/lib/CodeGen/SafeStack.cpp
index 1c109a1f9fe..33ffd94e4f8 100644
--- a/gnu/llvm/llvm/lib/CodeGen/SafeStack.cpp
+++ b/gnu/llvm/llvm/lib/CodeGen/SafeStack.cpp
@@ -176,6 +176,8 @@ class SafeStack {
 
   bool IsMemIntrinsicSafe(const MemIntrinsic *MI, const Use &U,
                           const Value *AllocaPtr, uint64_t AllocaSize);
+  bool IsAccessSafe(Value *Addr, TypeSize Size, const Value *AllocaPtr,
+                    uint64_t AllocaSize);
   bool IsAccessSafe(Value *Addr, uint64_t Size, const Value *AllocaPtr,
                     uint64_t AllocaSize);
 
@@ -206,6 +208,16 @@ uint64_t SafeStack::getStaticAllocaAllocationSize(const AllocaInst* AI) {
   return Size;
 }
 
+bool SafeStack::IsAccessSafe(Value *Addr, TypeSize AccessSize,
+                             const Value *AllocaPtr, uint64_t AllocaSize) {
+  if (AccessSize.isScalable()) {
+    // In case we don't know the size at compile time we cannot verify if the
+    // access is safe.
+    return false;
+  }
+  return IsAccessSafe(Addr, AccessSize.getFixedValue(), AllocaPtr, AllocaSize);
+}
+
 bool SafeStack::IsAccessSafe(Value *Addr, uint64_t AccessSize,
                              const Value *AllocaPtr, uint64_t AllocaSize) {
   const SCEV *AddrExpr = SE.getSCEV(Addr);