r118355 - in /trunk/gcc: ChangeLog fold-const.c...

[sayle@gcc.gnu.org]

Author: sayle
Date: Wed Nov  1 02:56:45 2006
New Revision: 118355

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=118355
Log:

	PR middle-end/23470
	* tree.h (tree_expr_nonnegative_p): Return "bool" instead of "int".
	* fold-const.c (tree_expr_nonnegative_p): Likewise.  Consider
	pow(x,y) and powi(x,y) to be nonnegative if either x is nonnegative
	or y is an even integer.

	* gcc.dg/pr23470-1.c: New test case.


Added:
    trunk/gcc/testsuite/gcc.dg/pr23470-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree.h