Index: llvm/lib/IR/Function.cpp
===================================================================
--- llvm/lib/IR/Function.cpp
+++ llvm/lib/IR/Function.cpp
@@ -1180,7 +1180,7 @@
     case IITDescriptor::Quad: return !Ty->isFP128Ty();
     case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
     case IITDescriptor::Vector: {
-      VectorType *VT = dyn_cast<VectorType>(Ty);
+      FixedVectorType *VT = dyn_cast<FixedVectorType>(Ty);
       return !VT || VT->getNumElements() != D.Vector_Width ||
              matchIntrinsicType(VT->getElementType(), Infos, ArgTys,
                                 DeferredChecks, IsDeferredCheck);
@@ -1357,7 +1357,11 @@
     case IITDescriptor::ScalableVecArgument: {
       if (!isa<ScalableVectorType>(Ty))
         return true;
-      return matchIntrinsicType(Ty, Infos, ArgTys, DeferredChecks,
+      ScalableVectorType *STy = cast<ScalableVectorType>(Ty);
+      unsigned MinElts = STy->getElementCount().Min;
+      FixedVectorType *FVTy =
+          FixedVectorType::get(STy->getElementType(), MinElts);
+      return matchIntrinsicType(FVTy, Infos, ArgTys, DeferredChecks,
                                 IsDeferredCheck);
     }
     case IITDescriptor::VecOfBitcastsToInt: {