c90-const-expr-8.c: Look for overflow on INT_MIN % -1.

c90-const-expr-8.c: Look for overflow on INT_MIN % -1.

2013-11-27  Kenneth Zadeck  <zadeck@naturalbridge.com>

	* gcc.dg/c90-const-expr-8.c: Look for overflow on INT_MIN % -1.
	* gcc.dg/c99-const-expr-8.c: Look for overflow on INT_MIN % -1.

2013-11-27  Kenneth Zadeck  <zadeck@naturalbridge.com>

	* fold-const.c
	(int_const_binop_1): Make INT_MIN % -1 return 0 with the overflow
	bit set.

From-SVN: r205448