--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.target/powerpc/vec-clrr-1.c	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,37 @@
+/* { dg-do run } */
+/* { dg-require-effective-target powerpc_future_hw } */
+/* { dg-options "-mdejagnu-cpu=future" } */
+
+#include <altivec.h>
+
+extern void abort (void);
+
+/* Vector string clear right-most bytes of unsigned char.  */
+vector unsigned char
+clrr (vector unsigned char arg, int n)
+{
+  return vec_clrr (arg, n);
+}
+
+int main (int argc, char *argv [])
+{
+  vector unsigned char input0 =
+    { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
+      0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x11 };
+  vector unsigned char expected0 =
+    { 0x1, 0x2, 0x3, 0x4, 0x5, 0x0, 0x0, 0x0,
+      0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
+  vector unsigned char expected1 =
+    { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
+      0x9, 0xa, 0xb, 0xc, 0xd, 0x0, 0x0, 0x0 };
+  vector unsigned char expected2 =
+    { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
+      0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x11 };
+
+  if (!vec_all_eq (clrr(input0, 5), expected0))
+    abort ();
+  if (!vec_all_eq (clrr(input0, 13), expected1))
+    abort ();
+  if (!vec_all_eq (clrr(input0, 19), expected2))
+    abort ();
+}