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[tuples][patch] Recording vars whose address is taken in phi nodes


Hello,

This patch adds the code to record variables, whose address is taken
within phi nodes.
Tested on i686-linux, no regressions.

2008-03-11  Diego Novillo <dnovillo@google.com>

	* tree-ssa-operands.h: Added declaration of add_to_addressable_set.
	* tree-ssa-operands.h (add_to_addressable_set): New function.
	(gimple_add_to_addresses_taken): Moved most of the logic to
	add_addressable_set.
	* tree-ssa-structalias.c (update_alias_info): Record the variables
	whose address is taken inside a phi node.


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