Fix ARM test

Author: lukel97

llvm/test/Transforms/LoopVectorize/ARM/mve-gather-scatter-tailpred.ll

@@ -516,9 +516,7 @@ define void @test_stride_noninvar3_4i32(ptr readonly %data, ptr noalias nocaptur
 ; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <4 x i32> [[DOTSPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP1:%.*]] = mul <4 x i32> <i32 0, i32 1, i32 2, i32 3>, [[DOTSPLAT]]
 ; CHECK-NEXT:    [[INDUCTION:%.*]] = add <4 x i32> splat (i32 3), [[TMP1]]
-; CHECK-NEXT:    [[TMP2:%.*]] = mul i32 [[X]], 4
-; CHECK-NEXT:    [[DOTSPLATINSERT2:%.*]] = insertelement <4 x i32> poison, i32 [[TMP2]], i64 0
-; CHECK-NEXT:    [[DOTSPLAT3:%.*]] = shufflevector <4 x i32> [[DOTSPLATINSERT2]], <4 x i32> poison, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[DOTSPLAT3:%.*]] = mul <4 x i32> [[DOTSPLAT]], splat (i32 4)
 ; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
 ; CHECK:       vector.body:
 ; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]