gcc/gcc ChangeLog loop-iv.c loop-unroll.c

[rakdver@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rakdver@gcc.gnu.org	2005-05-06 20:24:01

Modified files:
	gcc            : ChangeLog loop-iv.c loop-unroll.c 

Log message:
	PR rtl-optimization/21254
	* loop-iv.c (iv_number_of_iterations): Simplify infiniteness
	assumptions for loops that otherwise do not roll.
	(find_simple_exit): Prefer # of iterations that is guaranteed
	not to be infinite.
	* loop-unroll.c (decide_peel_once_rolling,
	decide_peel_completely): Check whether the loop is infinite.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8628&r2=2.8629
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-iv.c.diff?cvsroot=gcc&r1=2.31&r2=2.32
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-unroll.c.diff?cvsroot=gcc&r1=1.32&r2=1.33