gcc/gcc ChangeLog gcse.c

[rearnsha@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rearnsha@gcc.gnu.org	2003-12-03 10:02:31

Modified files:
	gcc            : ChangeLog gcse.c 

Log message:
	* gcse.c (reg_clear_last_set): New function.
	(reg_set_info): If data is non-null, treat it as an sbitmap of
	registers, set the bit for the register being set.
	(compute_store_table): Allocate last_set_in with xcalloc.  Do not
	memset this array on each iteration.  Pass reg_set_in_block[bb->index]
	to note_stores while computing last_set_in instead of scanning
	last_set_in after the first pass through the insns.
	Clear last_set_in using reg_clear_last_set instead of explicitly
	rescanning after each insn.  If checking is enabled, assert that
	last_set_in is completely zeroed after each bb has been processed.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.1898&r2=2.1899
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/gcse.c.diff?cvsroot=gcc&r1=1.279&r2=1.280