https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70460
--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> --- Can we change it to just use SET_SRC (single_set (...))? I don't think the new pass was intended to handle anything new, only to disentangle the logic in ira. Alan mentioned gfortran.dg/pr46755.f as the only preexisting testcase where the label replacement triggers a delete_unreachable_blocks call.
