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[Ada] Generate optimized code for protected subprograms if no exceptions.

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Tristan Gingold <gingold at adacore dot com>
Date: Wed, 29 Jan 2014 10:22:12 -0500
Subject: [Ada] Generate optimized code for protected subprograms if no exceptions.
Authentication-results: sourceware.org; auth=none

If exceptions aren't propagated, the optimized path of
Exp_Ch9.Build_Protected_Subprogram_Body could be used.

No functional change, so no testcase.

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

2014-01-29  Tristan Gingold  <gingold@adacore.com>

	* exp_ch9.adb (Is_Exception_Safe): Return true if no exceptions.

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