egcs/gcc ChangeLog ssa-dce.c

[law@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	egcs
Changes by:	law@gcc.gnu.org	2001-06-29 11:26:22

Modified files:
	gcc            : ChangeLog ssa-dce.c 

Log message:
	* ssa-dce.c (note_inherently_necessary_set): New function.
	(find_inherently_necessary): Use it.  Do not consider
	NOTEs, CODE_LABELs or BARRIERS are necessary.  Improve
	handling of asms and unspecs.
	(delete_insn_bb): Only delete INSNs, CALL_INSNs or JUMP_INSNs.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.10496&r2=1.10497
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/ssa-dce.c.diff?cvsroot=gcc&r1=1.3&r2=1.4