On Fri, Apr 01, 2016 at 08:32:28AM -0700, Andrew Pinski wrote: > On Thu, Mar 31, 2016 at 9:54 PM, Segher Boessenkool > <seg...@kernel.crashing.org> wrote: > > Sometimes people write loops that they do not want optimized away, even > > when the compiler can replace those loops by a simple expression (or > > nothing). For such people, this patch adds a compiler option. > > The Linux kernel has a nice workaround for this case, at least for the > divide case.
I know, I wrote that code :-) It has a slightly different purpose (and semantics) though: it makes _sure_ that "inside, we know what is going on" does not hold (that's what "+rm" does). But yes, it is playing a similar game. Segher
