r129796 - in /trunk/gcc: ChangeLog fold-const.c...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Oct 31 12:33:05 2007
New Revision: 129796

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129796
Log:
2007-10-31  Richard Guenther  <rguenther@suse.de>

	PR middle-end/33779
	* fold-const.c (extract_muldiv_1): Make sure to not introduce
	new undefined integer overflow.
	(fold_binary): Avoid useless conversion.

	* gcc.c-torture/execute/pr33779-1.c: New testcase.
	* gcc.c-torture/execute/pr33779-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr33779-1.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr33779-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog