* tree.c: (obj_type_ref_class): Move to...
	* ipa-devirt.c (obj_type_ref_class): Move to here; lookup main
	odr type.
	(get_odr_type): Compensate for type simplification.

	* g++.dg/ipa/devirt-30.C: Add dg-do.
	* g++.dg/lto/devirt-1_0.C: New testcase.
	* g++.dg/lto/devirt-2_0.C: New testcase.
	* g++.dg/lto/devirt-3_0.C: New testcase.
	* g++.dg/lto/devirt-4_0.C: New testcase.
	* g++.dg/lto/devirt-5_0.C: New testcase.
	* g++.dg/lto/devirt-6_0.C: New testcase.
	* g++.dg/lto/devirt-13_0.C: New testcase.
	* g++.dg/lto/devirt-14_0.C: New testcase.
	* g++.dg/lto/devirt-19_0.C: New testcase.
	* g++.dg/lto/devirt-22_0.C: New testcase.
	* g++.dg/lto/devirt-23_0.C: New testcase.
	* g++.dg/lto/devirt-30_0.C: New testcase.
	* g++.dg/lto/devirt-34_0.C: New testcase.

From-SVN: r267359