Revert:

	2007-09-04  Jan Hubicka  <jh@suse.cz>
	* tree-tailcall.c (eliminate_tail_call): Expect unrenamed return value.

	2007-09-04  Richard Guenther  <rguenther@suse.de>
	* tree-ssa-operands.c (add_virtual_operand): Only mark
	stores as has_volatile_ops if alias information is not available.

From-SVN: r128109