* cgraphbuild.c (build_cgraph_edges): Do not walk into debugs.
(make_pass_rebuild_cgraph_edges): Also clear references.
* cgraph.c (verify_cgraph_node): Add basic ipa-ref verifier.
* ipa-inline-transform.c (inline_transform): Remove all references
after inlining.
* cgraphunit.c (expand_function): Remove all references after expansion.
* ipa-ref.c (ipa_ref_has_aliases_p): Fix formatting.
(ipa_find_reference): Rewrite to iterator.
(remove_stmt_references): Likewise.
(ipa_clear_stmts_in_references): New function.
* ipa-ref.h (ipa_clear_stmts_in_references): Declare.
* cgraphclones.c (cgraph_materialize_all_clones): Remove or clear references.
* ipa-split.c (split_function): Remove references in split function.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@201601 138bc75d-0d04-0410-961f-82ee72b054a4