https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68088
James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Last reconfirmed|2015-10-25 00:00:00 |2015-10-26 Assignee|unassigned at gcc dot gnu.org |jgreenhalgh at gcc dot gnu.org --- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> --- Confirmed, and mine. This looks like me trying to pull REGNO out of "accumulator" without first checking it is a REG. I'll take a look at a fix when I'm properly back from vacation.