diff --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp
index 280a13ff115341..0ebc6a5919e819 100644
--- a/llvm/lib/Analysis/ConstantFolding.cpp
+++ b/llvm/lib/Analysis/ConstantFolding.cpp
@@ -2400,6 +2400,11 @@ static Constant *ConstantFoldVectorCall(StringRef Name,
   SmallVector<Constant *, 4> Lane(Operands.size());
   Type *Ty = VTy->getElementType();
 
+  // Do not iterate on scalable vector. The number of elements is unknown at
+  // compile-time.
+  if (VTy->getVectorIsScalable())
+    return nullptr;
+
   if (IntrinsicID == Intrinsic::masked_load) {
     auto *SrcPtr = Operands[0];
     auto *Mask = Operands[2];
diff --git a/llvm/test/Analysis/ConstantFolding/vscale.ll b/llvm/test/Analysis/ConstantFolding/vscale.ll
index 2491308910dfb2..3a3d6a16c7d664 100644
--- a/llvm/test/Analysis/ConstantFolding/vscale.ll
+++ b/llvm/test/Analysis/ConstantFolding/vscale.ll
@@ -210,3 +210,14 @@ define <vscale x 4 x i32> @select() {
   %r = select <vscale x 4 x i1> undef, <vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> undef
   ret <vscale x 4 x i32> %r
 }
+
+declare <vscale x 16 x i8> @llvm.sadd.sat.nxv16i8(<vscale x 16 x i8>, <vscale x 16 x i8>)
+
+define <vscale x 16 x i8> @call() {
+; CHECK-LABEL: @call(
+; CHECK-NEXT:    [[R:%.*]] = call <vscale x 16 x i8> @llvm.sadd.sat.nxv16i8(<vscale x 16 x i8> undef, <vscale x 16 x i8> undef)
+; CHECK-NEXT:    ret <vscale x 16 x i8> [[R]]
+;
+  %r =  call <vscale x 16 x i8> @llvm.sadd.sat.nxv16i8(<vscale x 16 x i8> undef, <vscale x 16 x i8> undef)
+  ret <vscale x 16 x i8> %r
+}