re PR tree-optimization/21705 (FRE does not eliminate a redundant pure call.)

2005-05-25  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR tree-optimization/21705

	* tree-ssa-pre.c (in_fre): New static variable.
	(create_value_expr_from): Recursively value number reference ops
	in argument lists.
	(can_value_number_call): Temporary restrict only exists for
	PRE, not FRE.

From-SVN: r100156