https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85682
--- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> --- The bisect robot doesn't bootstrap, only build a stage 1 compiler. I've checked your most recent patch against these testcases, and they execute and complete fine. (In reply to Luis Machado from comment #2) > I did a fresh x86-64 bootstrap with the changes in and those prefetch tests > are not executed as part of dg.exp. Running by hand they look sane to me. I'm sure this is just a typo, but you probably didn't mean "dg.exp" in this case - the prefetch tests are in tree-ssa.exp and the opt-1 and opt-2 tests are in i386.exp .