sem_ch6.adb (Analyze_Subprogram_Body_Helper): If the body is created for SPARK_To_C...

sem_ch6.adb (Analyze_Subprogram_Body_Helper): If the body is created for SPARK_To_C...

2016-04-21  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch6.adb (Analyze_Subprogram_Body_Helper): If the body is
	created for SPARK_To_C, the entity must remain invisible so it
	does not overload subsequent references to the original function.
	* exp_ch6.adb (Build_Procedure_Body_Form, Replace_Returns):
	Handle Extended_Return_Statements by replacing it with a block
	with assignments and a simple return statement.
	* exp_util.adb (Build_Procedure_Form): Make procedure entity
	invisible after analyzing declaration, to prevent improper
	overloading.

From-SVN: r235306