2008-07-19  Richard Guenther  <rguenther@suse.de>

	PR bootstrap/36864
	* tree-ssa-sccvn.h (get_constant_value_id): Declare.
	* tree-ssa-sccvn.c (get_constant_value_id): New function.
	* tree-ssa-pre.c (get_expr_value_id): For newly created
	constant value-ids make sure to add the expression to its
	expression-set.

From-SVN: r137991