r195260 - in /trunk/gcc/fortran: ChangeLog tran...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Thu Jan 17 09:53:19 2013
New Revision: 195260

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195260
Log:
2013-01-17  Richard Biener  <rguenther@suse.de>

	fortran/
	* trans-stmt.c (gfc_trans_do): Conditionally compute countm1
	dependent on sign of step, avoids repeated evaluation of
	step sign test.  Avoid undefined overflow issues by using unsigned
	arithmetic.

Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/trans-stmt.c