diff --git a/llvm/test/Transforms/InstCombine/and-narrow.ll b/llvm/test/Transforms/InstCombine/and-narrow.ll
index a8661a9f796573..d53aef9ce97c6e 100644
--- a/llvm/test/Transforms/InstCombine/and-narrow.ll
+++ b/llvm/test/Transforms/InstCombine/and-narrow.ll
@@ -175,6 +175,16 @@ define <2 x i16> @zext_lshr_vec_overshift(<2 x i8> %x) {
   ret <2 x i16> %r
 }
 
+define <2 x i16> @zext_lshr_vec_undef(<2 x i8> %x) {
+; CHECK-LABEL: @zext_lshr_vec_undef(
+; CHECK-NEXT:    ret <2 x i16> zeroinitializer
+;
+  %z = zext <2 x i8> %x to <2 x i16>
+  %b = lshr <2 x i16> %z, undef
+  %r = and <2 x i16> %b, %z
+  ret <2 x i16> %r
+}
+
 ; Don't create poison by narrowing a shift below the shift amount.
 
 define <2 x i16> @zext_shl_vec_overshift(<2 x i8> %x) {
@@ -190,3 +200,13 @@ define <2 x i16> @zext_shl_vec_overshift(<2 x i8> %x) {
   ret <2 x i16> %r
 }
 
+define <2 x i16> @zext_shl_vec_undef(<2 x i8> %x) {
+; CHECK-LABEL: @zext_shl_vec_undef(
+; CHECK-NEXT:    ret <2 x i16> zeroinitializer
+;
+  %z = zext <2 x i8> %x to <2 x i16>
+  %b = shl <2 x i16> %z, undef
+  %r = and <2 x i16> %b, %z
+  ret <2 x i16> %r
+}
+