2012-10-02 Ben Brosgol <brosgol@adacore.com>

2012-10-02  Ben Brosgol  <brosgol@adacore.com>

	* gnat_rm.texi: Minor editing.

2012-10-02  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch6.adb (Analyze_Function_Return): Reject a return
	expression whose type is a local access to subprogram type.

2012-10-02  Robert Dewar  <dewar@adacore.com>

	* sem_eval.adb: Minor improvement to Compile_Time_Compare.

2012-10-02  Robert Dewar  <dewar@adacore.com>

	* checks.adb (Apply_Arithmetic_Overflow_Minimized_Eliminated):
	Fix base type problem that resulted in improper conversion.
	(Minimize_Eliminate_Overflow_Checks): Properly handle top
	level case to avoid unnecessary conversion to bignum or LLI.
	(Minimize_Eliminate_Overflow_Checks): Implement uniform two phase
	approach for arithmetic operators and for if/case expressions.
	* checks.ads: Minor comment fix.
	* exp_ch4.adb (Minimized_Eliminated_Overflow_Check): New function,
	implements a uniform way of treating minimized/eliminated checks in
	two phases.
	(Expand_Compare_Minimize_Eliminate_Overflow): Fix cut and
	paste error resulting in wrong results for less than in some
	cases.	(Expand_Membership_Minimize_Eliminate_Overflow):
	Fix error caused by incorrect capture of operand types.
	(Expand_Membership_Minimize_Eliminate_Overflow): Fix error in
	handling of bignum case.
	(Expand_N_Case_Expression): Implement
	proper two phase handling (Expand_N_If_Expression): Implement
	proper two phase handling (Expand_N_Op_Abs): Implement proper
	two phase handling ditto for all other arithmetic operators
	* sem_res.adb (Resolve_If_Expression): Avoid introducing
	unneeded conversions.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191980 138bc75d-0d04-0410-961f-82ee72b054a4