https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
--- Comment #17 from Josh Poimboeuf <jpoimboe at redhat dot com> --- (In reply to Richard Biener from comment #14) > (In reply to Josh Poimboeuf from comment #13) > > Interestingly, the function's epilogue (frame pointer restore) and return > > instruction are also getting discarded. Can you tell if that will always be > > the case when this bug triggers? > > I don't think we can rely on that. The path could simply fall thru to > a random instruction which is still inside the function. Say, if it was > > if (x) > ... > else > ... > foo (); > > then the arm marked unreachable would simply disappear. I tried doing that by putting the offending wwn_to_u64() call in an if statement, but then the bug disappeared. In fact, adding *any* code before the call seems to make the bug disappear.
