--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.target/i386/mv2.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,127 @@
+/* Test case to check if Multiversioning chooses the correct
+   dispatching order when versions are for various ISAs.  */
+/* { dg-do run } */
+/* { dg-require-ifunc "" }  */
+/* { dg-options "-O2" } */
+
+#include <assert.h>
+
+/* Default version.  */
+int foo () __attribute__ ((target ("default")));
+/* The dispatch checks should be in the exact reverse order of the
+   declarations below.  */
+int foo () __attribute__ ((target ("mmx")));
+int foo () __attribute__ ((target ("sse")));
+int foo () __attribute__ ((target ("sse2")));
+int foo () __attribute__ ((target ("sse3")));
+int foo () __attribute__ ((target ("ssse3")));
+int foo () __attribute__ ((target ("sse4.1")));
+int foo () __attribute__ ((target ("sse4.2")));
+int foo () __attribute__ ((target ("popcnt")));
+int foo () __attribute__ ((target ("avx")));
+int foo () __attribute__ ((target ("avx2")));
+int foo () __attribute__ ((target ("avx512f")));
+
+int main ()
+{
+  int val = foo ();
+
+  if (__builtin_cpu_supports ("avx512f"))
+    assert (val == 11);
+  else if (__builtin_cpu_supports ("avx2"))
+    assert (val == 10);
+  else if (__builtin_cpu_supports ("avx"))
+    assert (val == 9);
+  else if (__builtin_cpu_supports ("popcnt"))
+    assert (val == 8);
+  else if (__builtin_cpu_supports ("sse4.2"))
+    assert (val == 7);
+  else if (__builtin_cpu_supports ("sse4.1"))
+    assert (val == 6);
+  else if (__builtin_cpu_supports ("ssse3"))
+    assert (val == 5);
+  else if (__builtin_cpu_supports ("sse3"))
+    assert (val == 4);
+  else if (__builtin_cpu_supports ("sse2"))
+    assert (val == 3);
+  else if (__builtin_cpu_supports ("sse"))
+    assert (val == 2);
+  else if (__builtin_cpu_supports ("mmx"))
+    assert (val == 1);
+  else
+    assert (val == 0);
+
+  return 0;
+}
+
+int __attribute__ ((target("default")))
+foo ()
+{
+  return 0;
+}
+
+int __attribute__ ((target("mmx")))
+foo ()
+{
+  return 1;
+}
+
+int __attribute__ ((target("sse")))
+foo ()
+{
+  return 2;
+}
+
+int __attribute__ ((target("sse2")))
+foo ()
+{
+  return 3;
+}
+
+int __attribute__ ((target("sse3")))
+foo ()
+{
+  return 4;
+}
+
+int __attribute__ ((target("ssse3")))
+foo ()
+{
+  return 5;
+}
+
+int __attribute__ ((target("sse4.1")))
+foo ()
+{
+  return 6;
+}
+
+int __attribute__ ((target("sse4.2")))
+foo ()
+{
+  return 7;
+}
+
+int __attribute__ ((target("popcnt")))
+foo ()
+{
+  return 8;
+}
+
+int __attribute__ ((target("avx")))
+foo ()
+{
+  return 9;
+}
+
+int __attribute__ ((target("avx2")))
+foo ()
+{
+  return 10;
+}
+
+int __attribute__ ((target("avx512f")))
+foo ()
+{
+  return 11;
+}