Excerpts from Segher Boessenkool's message of February 11, 2021 9:50 pm: > On Thu, Feb 11, 2021 at 08:04:55PM +1000, Nicholas Piggin wrote: >> It would be nice if we could have a __builtin_trap_if that gcc would use >> conditional traps with, (and which never assumes following code is >> unreachable even for constant true, so we can use it with WARN and put >> explicit unreachable for BUG). > > It automatically does that with just __builtin_trap, see my other mail :-)
If that is generated without branches (or at least with no more branches than existing asm implementation), then it could be usable without trashing CFAR. Unfortunately I don't think we will be parsing the dwarf information to get line numbers from it any time soon, so not a drop in replacement but maybe one day someone would find a solution. Thanks, Nick
