gcc/gcc ChangeLog fold-const.c

[sayle@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2003-02-18 19:37:04

Modified files:
	gcc            : ChangeLog fold-const.c 

Log message:
	* fold-const.c (negate_expr_p): New function to determine whether
	an expression can be negated cheaply.
	(fold) [MINUS_EXPR]: Use it to determine whether to transform
	-A - B into -B - A for floating point types.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.16765&r2=1.16766
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.235&r2=1.236