diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
@@ -4015,7 +4015,7 @@
   EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
   EVT WidenEltVT = WidenVT.getVectorElementType();
   EVT VT = WidenVT;
-  unsigned NumElts =  VT.getVectorNumElements();
+  unsigned NumElts = VT.getVectorMinNumElements();
   const SDNodeFlags Flags = N->getFlags();
   while (!TLI.isTypeLegal(VT) && NumElts != 1) {
     NumElts = NumElts / 2;
@@ -4029,6 +4029,9 @@
     return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2, Flags);
   }
 
+  // FIXME: Improve support for scalable vectors.
+  assert(!VT.isScalableVector() && "Scalable vectors not handled yet.");
+
   // No legal vector version so unroll the vector operation and then widen.
   if (NumElts == 1)
     return DAG.UnrollVectorOp(N, WidenVT.getVectorNumElements());
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -112,6 +112,12 @@
 
   if (Subtarget.hasVInstructions()) {
     auto addRegClassForRVV = [this](MVT VT) {
+      // Disable the smallest fractional LMUL types if ELEN is less than
+      // RVVBitsPerBlock.
+      unsigned MinElts = RISCV::RVVBitsPerBlock / Subtarget.getELEN();
+      if (VT.getVectorMinNumElements() < MinElts)
+        return;
+
       unsigned Size = VT.getSizeInBits().getKnownMinValue();
       const TargetRegisterClass *RC;
       if (Size <= RISCV::RVVBitsPerBlock)
@@ -472,6 +478,9 @@
     }
 
     for (MVT VT : BoolVecVTs) {
+      if (!isTypeLegal(VT))
+        continue;
+
       setOperationAction(ISD::SPLAT_VECTOR, VT, Custom);
 
       // Mask VTs are custom-expanded into a series of standard nodes
@@ -519,8 +528,7 @@
     }
 
     for (MVT VT : IntVecVTs) {
-      if (VT.getVectorElementType() == MVT::i64 &&
-          !Subtarget.hasVInstructionsI64())
+      if (!isTypeLegal(VT))
         continue;
 
       setOperationAction(ISD::SPLAT_VECTOR, VT, Legal);
@@ -704,21 +712,31 @@
           }
         };
 
-    if (Subtarget.hasVInstructionsF16())
-      for (MVT VT : F16VecVTs)
+    if (Subtarget.hasVInstructionsF16()) {
+      for (MVT VT : F16VecVTs) {
+        if (!isTypeLegal(VT))
+          continue;
         SetCommonVFPActions(VT);
+      }
+    }
 
-    for (MVT VT : F32VecVTs) {
-      if (Subtarget.hasVInstructionsF32())
+    if (Subtarget.hasVInstructionsF32()) {
+      for (MVT VT : F32VecVTs) {
+        if (!isTypeLegal(VT))
+          continue;
         SetCommonVFPActions(VT);
-      SetCommonVFPExtLoadTruncStoreActions(VT, F16VecVTs);
+        SetCommonVFPExtLoadTruncStoreActions(VT, F16VecVTs);
+      }
     }
 
-    for (MVT VT : F64VecVTs) {
-      if (Subtarget.hasVInstructionsF64())
+    if (Subtarget.hasVInstructionsF64()) {
+      for (MVT VT : F64VecVTs) {
+        if (!isTypeLegal(VT))
+          continue;
         SetCommonVFPActions(VT);
-      SetCommonVFPExtLoadTruncStoreActions(VT, F16VecVTs);
-      SetCommonVFPExtLoadTruncStoreActions(VT, F32VecVTs);
+        SetCommonVFPExtLoadTruncStoreActions(VT, F16VecVTs);
+        SetCommonVFPExtLoadTruncStoreActions(VT, F32VecVTs);
+      }
     }
 
     if (Subtarget.useRVVForFixedLengthVectors()) {
diff --git a/llvm/test/CodeGen/RISCV/rvv/zve32-types.ll b/llvm/test/CodeGen/RISCV/rvv/zve32-types.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/rvv/zve32-types.ll
@@ -0,0 +1,91 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: sed 's/iXLen/i32/g' %s | llc -mtriple=riscv32 -mattr=+zve32f,+f,+zvl64b \
+; RUN:   -verify-machineinstrs | FileCheck %s --check-prefixes=CHECK
+; RUN: sed 's/iXLen/i64/g' %s | llc -mtriple=riscv64 -mattr=+zve32f,+f,+zvl64b \
+; RUN:   -verify-machineinstrs | FileCheck %s --check-prefixes=CHECK
+
+; Sanity check that type legalization kicks in for vscale x 1 types with Zve32.
+
+; NOTE: The load and store are widened by using VP_LOAD/STORE. The add/fadd are
+; widened by using the next larger LMUL and operating on the whole vector. This
+; isn't optimal, but doesn't crash.
+
+define void @vadd_vv_nxv1i8(<vscale x 1 x i8>* %pa, <vscale x 1 x i8>* %pb) {
+; CHECK-LABEL: vadd_vv_nxv1i8:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    csrr a2, vlenb
+; CHECK-NEXT:    srli a2, a2, 3
+; CHECK-NEXT:    vsetvli zero, a2, e8, mf4, ta, mu
+; CHECK-NEXT:    vle8.v v8, (a0)
+; CHECK-NEXT:    vle8.v v9, (a1)
+; CHECK-NEXT:    vsetvli a1, zero, e8, mf4, ta, mu
+; CHECK-NEXT:    vadd.vv v8, v8, v9
+; CHECK-NEXT:    vsetvli zero, a2, e8, mf4, ta, mu
+; CHECK-NEXT:    vse8.v v8, (a0)
+; CHECK-NEXT:    ret
+  %va = load <vscale x 1 x i8>, <vscale x 1 x i8>* %pa
+  %vb = load <vscale x 1 x i8>, <vscale x 1 x i8>* %pb
+  %vc = add <vscale x 1 x i8> %va, %vb
+  store <vscale x 1 x i8> %vc, <vscale x 1 x i8>* %pa
+  ret void
+}
+
+define void @vadd_vv_nxv1i16(<vscale x 1 x i16>* %pa, <vscale x 1 x i16>* %pb) {
+; CHECK-LABEL: vadd_vv_nxv1i16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    csrr a2, vlenb
+; CHECK-NEXT:    srli a2, a2, 3
+; CHECK-NEXT:    vsetvli zero, a2, e16, mf2, ta, mu
+; CHECK-NEXT:    vle16.v v8, (a0)
+; CHECK-NEXT:    vle16.v v9, (a1)
+; CHECK-NEXT:    vsetvli a1, zero, e16, mf2, ta, mu
+; CHECK-NEXT:    vadd.vv v8, v8, v9
+; CHECK-NEXT:    vsetvli zero, a2, e16, mf2, ta, mu
+; CHECK-NEXT:    vse16.v v8, (a0)
+; CHECK-NEXT:    ret
+  %va = load <vscale x 1 x i16>, <vscale x 1 x i16>* %pa
+  %vb = load <vscale x 1 x i16>, <vscale x 1 x i16>* %pb
+  %vc = add <vscale x 1 x i16> %va, %vb
+  store <vscale x 1 x i16> %vc, <vscale x 1 x i16>* %pa
+  ret void
+}
+
+define void @vadd_vv_nxv1i32(<vscale x 1 x i32>* %pa, <vscale x 1 x i32>* %pb) {
+; CHECK-LABEL: vadd_vv_nxv1i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    csrr a2, vlenb
+; CHECK-NEXT:    srli a2, a2, 3
+; CHECK-NEXT:    vsetvli zero, a2, e32, m1, ta, mu
+; CHECK-NEXT:    vle32.v v8, (a0)
+; CHECK-NEXT:    vle32.v v9, (a1)
+; CHECK-NEXT:    vsetvli a1, zero, e32, m1, ta, mu
+; CHECK-NEXT:    vadd.vv v8, v8, v9
+; CHECK-NEXT:    vsetvli zero, a2, e32, m1, ta, mu
+; CHECK-NEXT:    vse32.v v8, (a0)
+; CHECK-NEXT:    ret
+  %va = load <vscale x 1 x i32>, <vscale x 1 x i32>* %pa
+  %vb = load <vscale x 1 x i32>, <vscale x 1 x i32>* %pb
+  %vc = add <vscale x 1 x i32> %va, %vb
+  store <vscale x 1 x i32> %vc, <vscale x 1 x i32>* %pa
+  ret void
+}
+
+define void @vfadd_vv_nxv1f32(<vscale x 1 x float>* %pa, <vscale x 1 x float>* %pb) {
+; CHECK-LABEL: vfadd_vv_nxv1f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    csrr a2, vlenb
+; CHECK-NEXT:    srli a2, a2, 3
+; CHECK-NEXT:    vsetvli zero, a2, e32, m1, ta, mu
+; CHECK-NEXT:    vle32.v v8, (a0)
+; CHECK-NEXT:    vle32.v v9, (a1)
+; CHECK-NEXT:    vsetvli a1, zero, e32, m1, ta, mu
+; CHECK-NEXT:    vfadd.vv v8, v8, v9
+; CHECK-NEXT:    vsetvli zero, a2, e32, m1, ta, mu
+; CHECK-NEXT:    vse32.v v8, (a0)
+; CHECK-NEXT:    ret
+  %va = load <vscale x 1 x float>, <vscale x 1 x float>* %pa
+  %vb = load <vscale x 1 x float>, <vscale x 1 x float>* %pb
+  %vc = fadd <vscale x 1 x float> %va, %vb
+  store <vscale x 1 x float> %vc, <vscale x 1 x float>* %pa
+  ret void
+}