re PR tree-optimization/22615 (ICE in first_vi_for_offset, at tree-ssa-structalias...

re PR tree-optimization/22615 (ICE in first_vi_for_offset, at tree-ssa-structalias.c:2858)

2005-08-14  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR tree-optimization/22615

	* tree-ssa-structalias.c (solution_set_add): Handle
	first_vi_for_offset returning NULL.
	(do_da_constraint): Ditto.
	(do_sd_constraint): Ditto.
	(do_ds_constraint): Ditto
	(find_func_aliases): Ditto.
	(build_constraint_graph): RHS is allowed be ANYTHING.
	(first_vi_for_offset): Return NULL if we couldn't find anything at
	the offset.

From-SVN: r103083