2012-01-10  Bob Duff  <duff@adacore.com>

	* sem_intr.adb (Check_Shift): Use RM_Size instead of Esize, when
	checking that the 'Size is correct. If the type is "mod 2**12",
	for example, it's illegal, but Esize is the 'Object_Size, which
	will be something like 16 or 32, so the error ('Size = 12) was
	not detected.
	* gnat_rm.texi: Improve documentation of shift
	and rotate intrinsics.

2012-01-10  Pascal Obry  <obry@adacore.com>

	* prj.adb (For_Every_Project_Imported): Fix
	implementation to make sure we return each project only once
	for aggragte libraries. It is fine to return a project twice for
	aggregate projects, this was the case as a Project_Id is different
	in each project tree. The new implementation use a table based on
	the project name to ensure proper detection of duplicate project
	in aggregate library. A new context is then created to continue
	retrurning duplicate project for aggregate libraries.

From-SVN: r183059