gcc/gcc ChangeLog config/s390/s390.c config/s3 ...

[uweigand@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	uweigand@gcc.gnu.org	2004-01-28 00:16:01

Modified files:
	gcc            : ChangeLog 
	gcc/config/s390: s390.c s390.h s390.md 
	gcc/doc        : invoke.texi 

Log message:
	* config/s390/s390.h (TARGET_DEFAULT): Default to !TARGET_BACKCHAIN.
	* config/s390/s390.c (s390_return_addr_rtx): Fail for all but current
	frame if !TARGET_BACKCHAIN.
	* config/s390/s390.md ("allocate_stack"): Use pattern only if
	TARGET_BACKCHAIN.
	* doc/invoke.texi (-mbackchain/-mno-backchain): Document new default.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.92&r2=2.2326.2.93
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/s390/s390.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.125.4.1&r2=1.125.4.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/s390/s390.h.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.92&r2=1.92.4.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/s390/s390.md.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.90&r2=1.90.4.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.390.2.6&r2=1.390.2.7