[Bug rtl-optimization/23560] [4.0 Regression] Strength-reduction breaking unsigned COMPARE

Fri Aug 26 21:59:00 GMT 2005

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-26 21:57 -------
Subject: Bug 23560

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	jakub@gcc.gnu.org	2005-08-26 21:57:28

Modified files:
	gcc            : ChangeLog loop.c 

Log message:
	PR rtl-opt/23560
	* loop.c (biased_biv_may_wrap_p): New.
	(maybe_eliminate_biv_1): Use it to suppress non-equality
	comparison transformations.  Delete disabled code.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9832&r2=2.9833
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop.c.diff?cvsroot=gcc&r1=1.539&r2=1.540


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23560