[AArch64] Fix longbranch test

Fix longbranch test so it still generates long tbz branches.

    gcc/testsuite/
	PR target/81643
	* gcc.target/aarch64/long_branch_1.c: Improve testcase.

From-SVN: r251094

gcc/testsuite/ChangeLog

+2017-08-14  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	PR target/81643
+	* gcc.target/aarch64/long_branch_1.c: Improve testcase.
+
 2017-08-14  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	PR target/79845

gcc/testsuite/gcc.target/aarch64/long_branch_1.c

@@ -54,10 +54,6 @@ test_and_branch (int selector, int addend, int cond)
     {
 start0:
       return sum - 1;
-start1:
-      return sum + 1;
-start2:
-      return sum;
 start3:
       return sum - 2;
     }
@@ -65,6 +61,8 @@ start3:
     {
       switch (selector)
 	{
+start1:
+start2:
 	  CASE_ENTRY128 (1)
 	  CASE_ENTRY64 (129)
 	  CASE_ENTRY16 (193)