[Objective-C PATCH] Canonical types (3/3)

[Doug Gregor]

This patch introduces canonical types into GCC. See the first part of
this patch for a complete explanation.

This is part three of three, containing changes to the Objective-C
(and, thus, Objective-C++) front end.

Okay for mainline?

  Cheers,
  Doug Gregor
  Open Systems Lab @ Indiana University

2006-11-28  Douglas Gregor  <doug.gregor@gmail.com>
	
	* objc-act.c (objc_build_volatilized_type): Keep track of
	canonical types.
	(objc_get_protocol_qualified_type): Ditto.
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