S/390: Do not require -march=z13 on s390 but only on s390x.

gcc/testsuite/ChangeLog

	* gcc.dg/tree-ssa/ssa-dom-cse-2.c: Remove -march=z13 for s390
	(only necessary on s390x).

From-SVN: r233171

gcc/testsuite/ChangeLog

+2016-02-05  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+	* gcc.dg/tree-ssa/ssa-dom-cse-2.c: Remove -march=z13 for s390
+	(only necessary on s390x).
+
 2016-02-04  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* gcc.target/i386/pr69454-2.c: Compile with -msse2

gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c

 /* { dg-do compile } */
 /* { dg-options "-O3 -fno-tree-fre -fno-tree-pre -fdump-tree-optimized --param sra-max-scalarization-size-Ospeed=32" } */
-/* S390 needs hardware vector support for this to work (the optimization gets
- * too complex without it.
- * { dg-additional-options "-march=z13" { target { s390*-*-* } } } */
+/* System Z needs hardware vector support for this to work (the optimization
+   gets too complex without it.
+   { dg-additional-options "-march=z13" { target { s390x-*-* } } } */
 
 
 int