* profile-count.c (safe_scale_64bit): Fix GCC4.x path.
	(profile_probability): Set max_probability
	to (uint32_t) 1 << (n_bits - 2) and update accessors to avoid overlfows
	in temporaries.
	* profile-count.c (profile_probability::differs_from_p): Do not
	rely on max_probaiblity == 10000

	* gcc.dg/predict-13.c: Update template for probaility change.
	* gcc.dg/predict-8.c: Likewise.

From-SVN: r253692