Add a testcase for PR middle-end/55116

	PR middle-end/55116
	* gcc.target/i386/pr55116.c: New file.

From-SVN: r192967

gcc/testsuite/ChangeLog

+2012-10-29  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR middle-end/55116
+	* gcc.target/i386/pr55116.c: New file.
+
 2012-10-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR c/53066

gcc/testsuite/gcc.target/i386/pr55116.c

+/* { dg-do compile { target { ! { ia32 } } } } */
+/* { dg-options "-O2 -mx32 -maddress-mode=long" } */
+
+int glob_int_arr[100];
+int glob_int = 4;
+
+void
+expr_global (void)
+{
+  __builtin_prefetch (glob_int_arr + glob_int, 0, 0);
+}