S/390: Xfail some tests in insv-[12].c.

The attached patch XFAILs some of the "insv" testcases as
discussed internally.  Tested on s390x biarch and s390.

gcc/testsuite/ChangeLog:

2016-07-20  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	* gcc.target/s390/insv-1.c: Xfail some tests.
	* gcc.target/s390/insv-2.c: Likewise.

From-SVN: r238530

gcc/testsuite/ChangeLog

+2016-07-20  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+	* gcc.target/s390/insv-1.c: Xfail some tests.
+	* gcc.target/s390/insv-2.c: Likewise.
+
 2016-07-20  Georg-Johann Lay  <avr@gjlay.de>
 
 	* gcc.target/avr/torture/get-mem.c: New test.

gcc/testsuite/gcc.target/s390/insv-1.c

@@ -108,4 +108,11 @@ foo4c (unsigned long a, unsigned long b)
 #endif
 }
 
-/* { dg-final { scan-assembler-times "risbg" 6 } } */
+/* The functions foo3, foo4, foo3b, foo4b no longer use risbg but rosbg instead.
+
+   On s390x, four risbg go away and four new ones appear in other functions ...
+     { dg-final { scan-assembler-times "risbg" 6 { target { s390x-*-* } } } }
+
+   but not on s390.
+     { dg-final { scan-assembler-times "risbg" 2 { target { s390-*-* } } } }
+*/

gcc/testsuite/gcc.target/s390/insv-2.c

@@ -108,4 +108,17 @@ foo4c (unsigned long a, unsigned long b)
 #endif
 }
 
-/* { dg-final { scan-assembler-times "risbgn" 6 } } */
+/* The functions foo3, foo4, foo3b, foo4b no longer use risbgn but rosbg instead
+   which is slightly worse.  Combine prefers to use the simpler two insn
+   combinations possible with rosbg instead of the more complicated three insn
+   combinations that result in risbgn.  This problem has been introduced with
+   the commit
+
+     S/390: Add patterns for r<nox>sbg instructions.
+
+   (3rd of May, 2016).  This should be fixed some time in the future, but for
+   now just adapt the expected result:
+
+   { dg-final { scan-assembler-times "risbgn" 6 { xfail { *-*-* } } } }
+   { dg-final { scan-assembler-times "risbgn" 2 } }
+*/