https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65177
--- Comment #8 from Jeffrey A. Law <law at redhat dot com> --- There's not enough information in those comments to definitively say the SEME copier isn't updating the SSA graph properly. If I were looking at this, I'd want the dump as we enter VRP or DOM (whichever is triggering the problematic FSM thread), then a dump after that pass was done. Preferably the dumps would include the basic block information (-fdump-tree-<whatever>-blocks). Knowing the shape of the CFG is critical to proving or disproving the SEME copier is mucking things up.
