PR tree-optimization/90576
	* tree-ssa-alias.c (compare_sizes): Remove dead calls to
	poly_int_tree_p.
	(aliasing_component_refs_p): Fix three way size compare conditional;
	give up earlier in case we can not decide on equivalence.

Co-Authored-By: Martin Liska <mliska@suse.cz>

From-SVN: r271572