diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index b912baef6188..fd9aff0f9fef 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -6324,6 +6324,9 @@ static bool validLookupTableConstant(Constant *C, const TargetTransformInfo &TTI
       !isa<UndefValue>(C) && !isa<ConstantExpr>(C))
     return false;
 
+  if (C->getType()->isVectorTy())
+    return false;
+
   if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
     // Pointer casts and in-bounds GEPs will not prohibit the backend from
     // materializing the array of constants.
diff --git a/llvm/test/Transforms/SimplifyCFG/AArch64/switch-to-lookup-table-vector-splat.ll b/llvm/test/Transforms/SimplifyCFG/AArch64/switch-to-lookup-table-vector-splat.ll
new file mode 100644
index 000000000000..6a14c6a909f9
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyCFG/AArch64/switch-to-lookup-table-vector-splat.ll
@@ -0,0 +1,47 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -passes='simplifycfg<switch-to-lookup>' -S < %s | FileCheck %s
+; RUN: opt -passes='simplifycfg<switch-to-lookup>' -use-constant-fp-for-fixed-length-splat -S < %s | FileCheck %s
+
+target triple = "aarch64-unknown-linux-gnu"
+
+define <4 x float> @no_switch_to_lookup_table_vector_splat(i32 %c) {
+; CHECK-LABEL: define <4 x float> @no_switch_to_lookup_table_vector_splat(
+; CHECK-SAME: i32 [[C:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    switch i32 [[C]], label %[[DEFAULT:.*]] [
+; CHECK-NEXT:      i32 0, label %[[RET:.*]]
+; CHECK-NEXT:      i32 1, label %[[BB1:.*]]
+; CHECK-NEXT:      i32 2, label %[[BB2:.*]]
+; CHECK-NEXT:    ]
+; CHECK:       [[BB1]]:
+; CHECK-NEXT:    br label %[[RET]]
+; CHECK:       [[BB2]]:
+; CHECK-NEXT:    br label %[[RET]]
+; CHECK:       [[DEFAULT]]:
+; CHECK-NEXT:    unreachable
+; CHECK:       [[RET]]:
+; CHECK-NEXT:    [[PHI:%.*]] = phi <4 x float> [ splat (float 3.000000e+00), %[[BB2]] ], [ splat (float 2.000000e+00), %[[BB1]] ], [ splat (float 1.000000e+00), %[[ENTRY]] ]
+; CHECK-NEXT:    ret <4 x float> [[PHI]]
+entry:
+  switch i32 %c, label %default [
+  i32 0, label %bb0
+  i32 1, label %bb1
+  i32 2, label %bb2
+  ]
+
+bb0:
+  br label %ret
+
+bb1:
+  br label %ret
+
+bb2:
+  br label %ret
+
+default:
+  unreachable
+
+ret:
+  %phi = phi <4 x float> [ splat (float 1.0), %bb0 ], [ splat (float 2.0), %bb1 ], [ splat (float 3.0), %bb2 ]
+  ret <4 x float> %phi
+}