2007-04-20 Javier Miranda <miranda@adacore.com>

	    Ed Schonberg  <schonberg@adacore.com>
	    Robert Dewar  <dewar@adacore.com>

	* sem_ch10.ads, sem_ch10.adb (Analyze_Compilation_Unit): Disable check
	on obsolescent withed unit in case of limited-withed units.
	(Analyze_Compilation_Unit): Add guard to code that removed an
	instantiation from visibility, to prevent compiler aborts when
	instantiation is abandoned early on.
	(Install_Limited_Withed_Unit): Recognize a limited-with clause on the
	current unit being analyzed, and Distinguish local incomplete types
	from limited views of types declared elsewhere.
	(Build_Limited_Views.Decorate_Tagged_Type): Add documentation
	to state that the class-wide entity is shared by the limited-view
	and the full-view.
	(Analyze_With_Clause): Improve placement of flag for case of
	unimplemented unit.
	(Analyze_With_Clause): Recognize use of GNAT.Exception_Traces in a
	manner similar to GNAT.Current_Exception. This is a violation of
	restriction (No_Exception_Propagation), and also inhibits the
	optimization of local raise to goto.
	(Analyze_With_Clause): Check for Most_Recent_Exception being with'ed,
	and if so set Most_Recent_Exception_Used flag in Opt, and also check
	for violation of restriction No_Exception_Propagation.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@125447 138bc75d-0d04-0410-961f-82ee72b054a4

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