re PR tree-optimization/49493 (ICE: in insert_vi_for_tree, at tree-ssa-structalias...

re PR tree-optimization/49493 (ICE: in insert_vi_for_tree, at tree-ssa-structalias.c:2637 with -O -fipa-pta)

2011-06-22  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/49493
	* tree-ssa-structalias.c (get_constraint_for_ssa_var):
	Refer to the alias target of variables.
	(associate_varinfo_to_alias_1): Remove.
	(ipa_pta_execute): Do not associate aliases with anything.
	* cgraph.h (varpool_alias_aliased_node): Fix cut&paste errors.
	(cgraph_function_node): Likewise.
	(cgraph_function_or_thunk_node): Likewise.
	(varpool_variable_node): Likewise.

	* gcc.dg/ipa/ipa-pta-17.c: New testcase.

From-SVN: r175300