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[Ada] Spurious warnings with dynamic elab checks

From: Pierre-Marie de Rodat <derodat at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Hristian Kirtchev <kirtchev at adacore dot com>
Date: Mon, 9 Oct 2017 16:19:42 -0400
Subject: [Ada] Spurious warnings with dynamic elab checks
Authentication-results: sourceware.org; auth=none

This patch classifies 'Access, variable assignments, and variable references as
static model-only scenarios because they are graph-dependent and do not produce
any checks. No need for a test.

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

2017-10-09  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_elab.adb (Is_Suitable_Access): This scenario is now only relevant
	in the static model.
	(Is_Suitable_Variable_Assignment): This scenario is now only relevant
	in the static model.
	(Is_Suitable_Variable_Reference): This scenario is now only relevant in
	the static model.

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