Testcases using dg-options require at least -mzarch.

Testcases which override the vect default options using dg-options
need at least -mzarch on S/390 32 bit.

gcc/testsuite/ChangeLog:

2017-10-04  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* gfortran.dg/vect/fast-math-mgrid-resid.f: Use -mzarch on S/390.
	* gfortran.dg/vect/pr77848.f: Likewise.

From-SVN: r253404

gcc/testsuite/ChangeLog

 2017-10-04  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
+	* gfortran.dg/vect/fast-math-mgrid-resid.f: Use -mzarch on S/390.
+	* gfortran.dg/vect/pr77848.f: Likewise.
+
+2017-10-04  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
 	* lib/target-supports.exp (check_effective_target_vect_float):
 	Return 1 being on a S/390 with VXE.
 	* gcc.dg/vect/pr31699.c: Require vec_float.

gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f

@@ -2,6 +2,7 @@
 ! { dg-require-effective-target vect_double }
 ! { dg-options "-O3 --param vect-max-peeling-for-alignment=0 -fpredictive-commoning -fdump-tree-pcom-details" }
 ! { dg-additional-options "-mprefer-avx128" { target { i?86-*-* x86_64-*-* } } }
+! { dg-additional-options "-mzarch" { target { s390*-*-* } } }
 
 ******* RESID COMPUTES THE RESIDUAL:  R = V - AU
 *

gcc/testsuite/gfortran.dg/vect/pr77848.f

 ! PR 77848: Verify versioning is on when vectorization fails
 ! { dg-do compile }
 ! { dg-options "-O3 -ffast-math -fdump-tree-ifcvt -fdump-tree-vect-details" }
+! { dg-additional-options "-mzarch" { target { s390*-*-* } } }
 
       subroutine sub(x,a,n,m)
       implicit none