unroll-7.c: Declare "a" as a pointer to external array.

	* gcc.dg/unroll-7.c: Declare "a" as a pointer to external array.

From-SVN: r246817

gcc/testsuite/ChangeLog

 2017-04-10  Uros Bizjak  <ubizjak@gmail.com>
 
+	* gcc.dg/unroll-7.c: Declare "a" as a pointer to external array.
+
+2017-04-10  Uros Bizjak  <ubizjak@gmail.com>
+
 	PR testsuite/79356
 	* gcc.dg/attr-alloc_size-11.c: Don't xfail on alpha.
 

gcc/testsuite/gcc.dg/unroll-7.c

@@ -2,7 +2,9 @@
 /* { dg-options "-O2 -fdump-rtl-loop2_unroll -funroll-loops" } */
 /* { dg-require-effective-target int32plus } */
 
-int t(int *a)
+extern int *a;
+
+int t(void)
 {
   int i;
   for (i=0;i<1000000;i++)