Add the new file.

From-SVN: r66079

gcc/testsuite/gcc.dg/ia64-sync-4.c

+/* { dg-do compile { target ia64-*-* } } */
+/* { dg-options "-O2 -finline-functions" } */
+
+/* Test inlining __sync_bool_compare_and_swap_di.  */
+
+#include <stdbool.h>
+#include <ia64intrin.h>
+
+static bool
+compare_and_swap(long *addr, long old, long new_val)
+{
+  return __sync_bool_compare_and_swap_di(addr, old, new_val);
+}
+
+void
+foo (long *address)
+{
+  long he_address = *address & ~1;
+  while (!compare_and_swap(address, he_address, he_address | 1))
+    he_address = *address & ~1;
+}