S/390 vector types are only 8 byte aligned.

gcc/testsuite/
	* lib/target-supports.exp: Vector do not always have natural
          alignment on s390*.

From-SVN: r223403

gcc/testsuite/ChangeLog

+2015-05-19  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
+	* lib/target-supports.exp: Vector do not always have natural
+	alignment on s390*.
+
 2015-05-19  David Sherwood  <david.sherwood@arm.com>
 
 	* gcc.dg/loop-invariant.c: New testcase.
 
 2015-05-19  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
+	* lib/target-supports.exp: Vector do not always have natural
+	alignment on s390*.
+
+2015-05-19  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
 	* gcc.dg/tree-ssa/gen-vect-11b.c: Disable vector instructions on
 	s390*.
 	* gcc.dg/tree-ssa/gen-vect-11c.c: Likewise.

gcc/testsuite/lib/target-supports.exp

@@ -4350,7 +4350,8 @@ proc check_effective_target_vect_natural_alignment { } {
     } else {
         set et_vect_natural_alignment_saved 1
         if { [check_effective_target_arm_eabi]
-	     || [istarget nvptx-*-*] } {
+	     || [istarget nvptx-*-*]
+	     || [istarget s390*-*-*] } {
             set et_vect_natural_alignment_saved 0
         }
     }