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[Ada] Ravenscar simple barriers and validity checks

From: Pierre-Marie de Rodat <derodat at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Bob Duff <duff at adacore dot com>
Date: Mon, 18 Sep 2017 05:55:35 -0400
Subject: [Ada] Ravenscar simple barriers and validity checks
Authentication-results: sourceware.org; auth=none

If validity checks are enabled in Ravenscar mode, avoid incorrect error
messages complaining that simple barriers are not simple.

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

2017-09-18  Bob Duff  <duff@adacore.com>

	* exp_ch9.adb (Is_Simple_Barrier_Name): Follow Original_Node, in case
	validity checks have rewritten the tree.

Attachment: difs
Description: Text document

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