Adjust test case in PR68621 to compile with -fpic.

2016-03-02  Venkataramanan Kumar  <venkataramanan.kumar@amd.com>

        PR tree-optimization/68621
        * gcc.dg/tree-ssa/ifc-8.c: Adjust test.

From-SVN: r233888

gcc/testsuite/ChangeLog

+2016-03-02  Venkataramanan Kumar  <venkataramanan.kumar@amd.com>
+
+	PR tree-optimization/68621
+	* gcc.dg/tree-ssa/ifc-8.c: Adjust test.
+
 2016-03-01  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/i386/pr70007.c: New test.

gcc/testsuite/gcc.dg/tree-ssa/ifc-8.c

 
 /* { dg-do compile } */
-/* { dg-options "-Ofast -fdump-tree-ifcvt-details -fno-common -ftree-loop-if-convert-stores" } */
+/* { dg-options "-Ofast -fdump-tree-ifcvt-details -ftree-loop-if-convert-stores" } */
+/* { dg-require-visibility "" } */
 
 #define LEN 4096
- __attribute__((aligned (32))) float array[LEN];
+ __attribute__((visibility("hidden"), aligned (32))) float array[LEN] = {};
 
 void test ()
 {