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[Ada] Do not use secondary stack in some cases

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Bob Duff <duff at adacore dot com>
Date: Wed, 20 Apr 2016 05:07:22 -0400
Subject: [Ada] Do not use secondary stack in some cases
Authentication-results: sourceware.org; auth=none

The compiler is no longer using the secondary stack in the case of
"for ... of" loops over arrays. No small test case is available.

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

2016-04-20  Bob Duff  <duff@adacore.com>

	* sem_ch5.adb (Analyze_Iterator_Specification): Do not use secondary
	stack when possible.

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