* gcc.dg/lto/ipareference2_0.c: New file.
	* gcc.dg/lto/ipareference2_1.c: New file.
	* lto.c (promote_var, promote_fn): New functions.
	(lto_promote_cross_file_statics): Compute correctly boundary including
	static initializers of readonly vars.

From-SVN: r159604