diff --git a/llvm/test/CodeGen/X86/min-legal-vector-width.ll b/llvm/test/CodeGen/X86/min-legal-vector-width.ll
index e3c66e83c83f..62d181f7cbcb 100644
--- a/llvm/test/CodeGen/X86/min-legal-vector-width.ll
+++ b/llvm/test/CodeGen/X86/min-legal-vector-width.ll
@@ -1079,3 +1079,23 @@ define void @vselect_split_v16i16_setcc(<16 x i16> %s, <16 x i16> %t, <16 x i32>
   store <16 x i32> %b, <16 x i32>* %r
   ret void
 }
+
+define <16 x i8> @trunc_packus_v16i32_v16i8(<16 x i32>* %p, <16 x i8>* %q) "min-legal-vector-width"="256" {
+; CHECK-LABEL: trunc_packus_v16i32_v16i8:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vpxor %xmm0, %xmm0, %xmm0
+; CHECK-NEXT:    vpmaxsd 32(%rdi), %ymm0, %ymm1
+; CHECK-NEXT:    vpmovusdb %ymm1, %xmm1
+; CHECK-NEXT:    vpmaxsd (%rdi), %ymm0, %ymm0
+; CHECK-NEXT:    vpmovusdb %ymm0, %xmm0
+; CHECK-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; CHECK-NEXT:    vzeroupper
+; CHECK-NEXT:    retq
+  %a = load <16 x i32>, <16 x i32>* %p
+  %b = icmp slt <16 x i32> %a, <i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255>
+  %c = select <16 x i1> %b, <16 x i32> %a, <16 x i32> <i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255, i32 255>
+  %d = icmp sgt <16 x i32> %c, zeroinitializer
+  %e = select <16 x i1> %d, <16 x i32> %c, <16 x i32> zeroinitializer
+  %f = trunc <16 x i32> %e to <16 x i8>
+  ret <16 x i8> %f
+}