2010-06-17  Robert Dewar  <dewar@adacore.com>

	* checks.adb, exp_aggr.adb, exp_atag.adb, exp_attr.adb, exp_ch11.adb,
	exp_ch3.adb, exp_ch4.adb: Minor code reorganization.
	Use Make_Temporary.
	* tbuild.ads, tbuild.adb (Make_Temporary): Clean up, use Entity_Id
	instead of Node_Id.
	(Make_Temporary): Add more extensive documentation

From-SVN: r160893