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[Ada] Reduce compilation time at -O0 (5/n)

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Eric Botcazou <ebotcazou at adacore dot com>
Date: Tue, 2 Aug 2011 08:27:09 -0400
Subject: [Ada] Reduce compilation time at -O0 (5/n)

This patch slightly reduces compilation time at -O0 in typical conditions by
streamlining the implementation of the Sem_Type.Covers predicate.

No functional changes.

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

2011-08-02  Eric Botcazou  <ebotcazou@adacore.com>

	* sem_type.adb (Covers): Move trivial case to the top and reuse the
	computed value of Base_Type.

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