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[Ada] Detect all derived types as violation of the SPARK restriction

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Marc Sango <sango at adacore dot com>
Date: Wed, 31 Aug 2011 05:14:34 -0400
Subject: [Ada] Detect all derived types as violation of the SPARK restriction

When the SPARK restriction was set, GNAT was not issuing violations on some
derived types.  Now corrected.

Tested on x86_64-pc-linux-gnu, committed on trunk

2011-08-31  Marc Sango  <sango@adacore.com>

	* restrict.adb (Check_SPARK_Restriction): Change Comes_From_Source (N)
	by Comes_From_Source (Original_Node (N)) in order to treat also the
	nodes which have been rewritten.
	* sem_ch4.adb (Analyze_Explicit_Dereference, Analyze_Slice): Guard the
	explicit dereference and slice violation in spark mode on the nodes 
	coming only from the source code.

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