S/390: Fix several test cases

S/390: Fix several test cases

gcc/ChangeLog:

2020-04-21  Stefan Schulze Frielinghaus  <stefansf@linux.ibm.com>

	* config/s390/s390.md ("*<risbg_n>_ior_and_sr_ze<mode>"): Lift from SI
	mode to DSI. ("*trunc_sidi_and_subreg_ze<clobbercc_or_nocc>"): New
	insn pattern.

gcc/testsuite/ChangeLog:

2020-04-21  Stefan Schulze Frielinghaus  <stefansf@linux.ibm.com>

	* gcc.target/s390/addsub-signed-overflow-1.c: Fix options.
	* gcc.target/s390/addsub-signed-overflow-2.c: Fix options.
	* gcc.target/s390/bswap-1.c: Fix scan assembler regex.
	* gcc.target/s390/global-array-element-pic2.c: Fix scan assembler regex.
	* gcc.target/s390/load-relative-check.c: Fix options.
	* gcc.target/s390/morestack.c: Fix options.
	* gcc.target/s390/nobp-return-mem-z900.c: Temporarily silence this case.
	* gcc.target/s390/risbg-ll-1.c: Fix scan assembler regex.
	* gcc.target/s390/risbg-ll-2.c: Fix scan assembler regex.
	* gcc.target/s390/risbg-ll-3.c: Fix scan assembler regex.
	* gcc.target/s390/target-attribute/pr82012.c: Fix error message.