[Bug tree-optimization/122648] gimple_verify_flow_info does not verify PENDING_STMT is null for all edges

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122648

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We verify this somewhere, at least I remember putting some verifying in.  But
possibly not beyond some verify_*, but instead upon next use?