https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93273
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #2) > Confirmed. Wrecked by > > #1 0x0000000001627e0d in sink_clobbers (bb=<basic_block 0x2aaaac0ac4e0 > (9)>, > sunk=0x391bb90, found_opportunity=0x0) > at /space/rguenther/src/gcc-work1/gcc/tree-eh.c:3683 > 3683 SET_USE (use_p, gimple_vdef (first_sunk)); > > thus mine. We're sinking a clobber across a "backedge", those are not picked up by the queued insertion. Didn't figure this would happen ... (but also didn't think about abnormal edges here). Usually EH doesn't form loops...
