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[Ada] Clean up generation of FIRST/LAST temps for bounds

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Robert Dewar <dewar at adacore dot com>
Date: Fri, 13 Mar 2015 09:22:05 -0400
Subject: [Ada] Clean up generation of FIRST/LAST temps for bounds
Authentication-results: sourceware.org; auth=none

This is an internal change to the cleanup and simplify the
generation of FIRST/LAST temporaries for subtype bounds. No
test is needed since no functional effect on the behavior
of the compiler.

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

2015-03-13  Robert Dewar  <dewar@adacore.com>

	* exp_util.ads, exp_util.adb (Force_Evaluation): Add Related_Id and
	Is_Low/High_Bound params.
	* sem_ch3.adb (Constrain_Index): Use new Force_Evaluation calling
	sequence to simplify generation of FIRST/LAST temps for bounds.

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