egcs/gcc ChangeLog alias.c emit-rtl.c expr.c e ...

[kenner@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	egcs
Changes by:	kenner@gcc.gnu.org	2001-10-01 16:22:25

Modified files:
	gcc            : ChangeLog alias.c emit-rtl.c expr.c expr.h 

Log message:
	* alias.c (get_alias_set): Try to replace PLACEHOLDER_EXPR.
	Loop through NOPs, placeholders, and components.
	Don't go through NOPs if change mode.
	(record_alias_subset): Do nothing if SUBSET and SET are the same.
	* emit-rtl.c (set_mem_alias_set): Enable check.
	* expr.c (find_placeholder): New function.
	(expand_expr, case PLACEHOLDER_EXPR): Use it.
	(expand_expr, case COMPONENT_EXPR): Always copy OP0 when we need
	to modify it and avoid unneeded copies.
	* expr.h (expand_expr): Always define.
	(find_placeholder): New declaration.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.11456&r2=1.11457
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/alias.c.diff?cvsroot=gcc&r1=1.143&r2=1.144
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/emit-rtl.c.diff?cvsroot=gcc&r1=1.207&r2=1.208
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/expr.c.diff?cvsroot=gcc&r1=1.353&r2=1.354
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/expr.h.diff?cvsroot=gcc&r1=1.93&r2=1.94