2013-02-06  Eric Botcazou  <ebotcazou@adacore.com>

	* snames.ads-tmpl (Name_Loop_Optimize, Name_No_Unroll,
	Name_Unroll, Name_No_Vector, Name_Vector): New pragma-related
	names.
	(Pragma_Id): Add Pragma_Loop_Optimize value.
	* par-prag.adb (Prag): Handle Pragma_Loop_Optimize.
	* sem_prag.adb (Check_Loop_Invariant_Variant_Placement): Rename to...
	(Check_Loop_Pragma_Placement): ...this.
	(Analyze_Pragma)
	<Pragma_Loop_Invariant>: Adjust to above renaming.
	<Loop_Variant>: Likewise.
	 <Pragma_Loop_Optimize>: Implement new pragma Loop_Optimize.
	(Sig_Flags): Add Pragma_Loop_Optimize.
	* gnat_rm.texi (Implementation Defined Pragmas): Add Loop_Optimize.
	* gnat_ugn.texi (Vectorization of loops): Mention Loop_Optimize.

From-SVN: r195799