1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/vmla.ll b/llvm/test/CodeGen/ARM/vmla.ll
index 9c6b210be79..1f76d7377f5 100644
--- a/llvm/test/CodeGen/ARM/vmla.ll
+++ b/llvm/test/CodeGen/ARM/vmla.ll
@@ -213,3 +213,19 @@ entry:
   %4 = add <2 x i64> %arg0_uint64x2_t, %3
   ret <2 x i64> %4
 }
+
+; Redundant vector splats should be removed.  Radar 8597790.
+define void @fold_splat(<4 x i32>* %a, <4 x i32>* %b, <4 x i32>* %c) nounwind {
+; CHECK: fold_splat
+; CHECK-NOT: vdup
+; CHECK: vmla.i32
+  %tmp1 = load <4 x i32>* %a, align 16
+  %tmp3 = load <4 x i32>* %b, align 16
+  %tmp5 = load <4 x i32>* %c, align 16
+  %tmp6 = shufflevector <4 x i32> %tmp5, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
+  %tmp7 = shufflevector <4 x i32> %tmp6, <4 x i32> undef, <4 x i32> zeroinitializer
+  %tmp8 = mul <4 x i32> %tmp3, %tmp7
+  %tmp9 = add <4 x i32> %tmp1, %tmp8
+  store <4 x i32> %tmp9, <4 x i32>* %a, align 16
+  ret void
+}