2010-11-11  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/46383
	* ipa-prop.c (compute_complex_assign_jump_func): Ignore negative
	offsets.
	(compute_complex_ancestor_jump_func): Likewise.
	* tree.c (get_binfo_at_offset): Return NULL_TREE if offset is negative.

	* testsuite/g++.dg/torture/pr46383.C: New test.

From-SVN: r166598