https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
Andi Kleen <andi-gcc at firstfloor dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |andi-gcc at firstfloor dot org --- Comment #2 from Andi Kleen <andi-gcc at firstfloor dot org> --- If you go back long enough the RTL loop optimizer used to support that. It broke at some point, even before that one was removed. >so the doloop candidate isn't added? x86 doesn't have hardware do loops, it's only for some obscure targets like some DSPs.