2017-05-02  Eric Botcazou  <ebotcazou@adacore.com>

	* opt.ads: Add missing GNAT markers in comments.
	* opt.adb (Set_Opt_Config_Switches): Do not override earlier
	settings of Optimize_Alignment at the end.

2017-05-02  Hristian Kirtchev  <kirtchev@adacore.com>

	* checks.adb (Apply_Constraint_Check): Do not apply
	a discriminant check when the associated type is a constrained
	subtype created for an unconstrained nominal type.
	* exp_attr.adb: Minor reformatting.

2017-05-02  Bob Duff  <duff@adacore.com>

	* sem_ch3.adb (OK_For_Limited_Init_In_05): Handle correctly
	the N_Raise_Expression case.
	* sem_ch6.adb (Check_Limited_Return): Minor: clarify comment,
	and add assertions.

2017-05-02  Yannick Moy  <moy@adacore.com>

	* exp_ch4.adb (Expand_N_Op_Ne): Do not bump parenthese level and
	optimize length comparison in GNATprove mode.
	* exp_spark.adb (Expand_SPARK_Op_Ne): New function to rewrite
	operator /= into negation of operator = when needed.
	(Expand_SPARK): Call new
	function to expand operator /=.

2017-05-02  Ed Schonberg  <schonberg@adacore.com>

	* exp_fixd.adb (Expand_Divide_Fixed_By_Fixed_Giving_Fixed):
	Simplify the expression for a fixed-fixed division to remove
	divisions by constants whenever possible, as an optimization
	for restricted targets.

From-SVN: r247468