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[Ada] Reduce compilation time at -O0 (3/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 06:31:24 -0400
Subject: [Ada] Reduce compilation time at -O0 (3/n)

This patch significantly reduces compilation time at -O0 in typical conditions
by short-circuiting calls to the somewhat costly Is_RTE function when they are
not necessary.

No functional changes.

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

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

	* exp_ch6.adb (Expand_Call): Guard restriction checks with a call
	to Restriction_Check_Required.
	* sem_ch3.adb (Analyze_Object_Declaration): Likewise.
	* sem_res.adb (Resolve_Call): Likewise.
	* sem_attr.adb (Check_Stream_Attribute): Likewise.

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