egcs/gcc ChangeLog flow.c simplify-rtx.c local ...

[rth@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	egcs
Changes by:	rth@gcc.gnu.org	2000-11-30 13:40:33

Modified files:
	gcc            : ChangeLog flow.c simplify-rtx.c local-alloc.c 

Log message:
	* flow.c (make_edge): Early out, if no flags to set.
	(calculate_global_regs_live): Clear out garbage only when necessary.
	
	* simplify-rtx.c (varray_type used_regs): New.
	(clear_table): Use it to only clear necessary items.
	(cselib_lookup, cselib_record_set): Remember newly set items.
	(cselib_update_varray_sizes, cselib_init): Initialize and grow
	used_regs.
	
	* local-alloc.c (update_equiv_regs): New local `cleared_regs'.
	Move clearing of dead regs out of insn-loop.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.8455&r2=1.8456
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/flow.c.diff?cvsroot=gcc&r1=1.354&r2=1.355
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/simplify-rtx.c.diff?cvsroot=gcc&r1=1.33&r2=1.34
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/local-alloc.c.diff?cvsroot=gcc&r1=1.74&r2=1.75