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[Ada] Fix spurious warning on use before def in Refined_Post aspect

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Yannick Moy <moy at adacore dot com>
Date: Fri, 13 Jun 2014 05:40:26 -0400
Subject: [Ada] Fix spurious warning on use before def in Refined_Post aspect
Authentication-results: sourceware.org; auth=none

The Refined_Post aspect defined in SPARK 2014 should be considered like
a postcondition wrt issuing warnings on variable references.

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

2014-06-13  Yannick Moy  <moy@adacore.com>

	* sem_warn.adb (Check_Unset_References): Take
	case of Refined_Post into account in Within_Postcondition check.

Attachment: difs
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