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[Ada] New hash table to improve performance of the Project Manager

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Vincent Celier <celier at adacore dot com>
Date: Wed, 8 Apr 2009 15:32:35 +0200
Subject: [Ada] New hash table to improve performance of the Project Manager

A new mapping of unit names to source file names has been added in the
Project Manager, to improve its performance. There is no change of
behavior, so no test.

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

2009-04-08  Vincent Celier  <celier@adacore.com>

	* prj-nmsc.adb:
	(Add_Source): Add the mapping of the unit name to source file name in
	the Unit_Sources_HT hash table, if the unit name is not null.

	* prj.adb (Reset): Reset hash table Tree.Unit_Sources_HT

	* prj.ads (Unit_Sources_Htable): New hash table instantiation
	(Project_Tree_Data): New component Unit_Sources_HT

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