Segher Boessenkool <seg...@kernel.crashing.org> writes: > [ Please don't post new patch series as replies to old ] > > On Wed, Jul 22, 2020 at 12:02:33PM +0200, Andrea Corallo wrote: >> This first patch implements the addition of a new RTX instruction class >> FILLER_INSN, which has been white listed to allow placement of NOPs >> outside of a basic block. This is to allow padding after unconditional >> branches. This is favorable so that any performance gained from >> diluting branches is not paid straight back via excessive eating of >> nops. >> >> It was deemed that a new RTX class was less invasive than modifying >> behavior in regards to standard UNSPEC nops. > > Deemed, by whom? There are several people very against it, too. You > need to modify only one simple behaviour (maybe in a handful of places), > making a new RTX class for that is excessive.
Hi Segher, That's understood and agreed. I haven't posted any new patch on this, the quoted mail is an old one. I just wanted to discuss how to proceede this way with my mail of today. Thanks for your feedback! Andrea
