[Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-10-07 06:20 -------
Subject: Bug 17791

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rakdver@gcc.gnu.org	2004-10-07 06:20:35

Modified files:
	gcc            : ChangeLog loop-doloop.c loop-iv.c rtl.h 

Log message:
	PR rtl-optimization/17791
	* loop-doloop.c (doloop_modify): Take number of iterations as
	argument.
	(doloop_optimize): Extend or shorten the number of iterations
	when changing mode of counter register.
	* loop-iv.c (lowpart_subreg): Export.
	* rtl.h (lowpart_subreg): Declare.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.5778&r2=2.5779
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-doloop.c.diff?cvsroot=gcc&r1=2.9&r2=2.10
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-iv.c.diff?cvsroot=gcc&r1=2.20&r2=2.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/rtl.h.diff?cvsroot=gcc&r1=1.512&r2=1.513



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791