[Bug tree-optimization/77286] [7 Regression] ICE in fold_convert_loc, at fold-const.c:2248 building 435.gromacs

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77286

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, again slpeels incredibly fragile manual SSA updating which relies on PHI
nodes
to appear in exactly the same order...  which is AFAIK why I at some point
removed that lc-PHI handling bail-out I re-added.  We can't rely on update-ssa
to perform it.