re PR tree-optimization/26361 (bootstrap failure on Alpha: xgcc runs out of memory compiling libiberty/md5.c)


	PR tree-optimization/26361
	* tree-vrp.c (extract_range_from_unary_expr): Handle NEGATE_EXPR
	of unsigned integer types.

	* gcc.dg/tree-ssa/vrp27.c: New test case.

From-SVN: r111327