Hi, Segher Boessenkool <seg...@kernel.crashing.org> writes:
> On Thu, Dec 22, 2022 at 11:28:01AM +0000, Richard Biener wrote: >> On Thu, 22 Dec 2022, Jiufu Guo wrote: >> > To reduce risk, I'm just draft straightforward patches for >> > special cases currently, Like: >> > https://gcc.gnu.org/pipermail/gcc-patches/2022-December/608081.html >> > and this patch. >> >> Heh, yes - though I'm not fond of special-casing things. RTL >> expansion is already full of special cases :/ > > And many of those are not useful at all (would be done by later passes), > or are actively harmful. Not to mention that expand is currently one of > the most impregnable and undebuggable RTL passes. > > But there are also many things done during expand that although they > should be done somewhat later, aren't actually done later at all > currently. So that needs fixing. > > Maybe things should go via an intermediate step, where all the decisions > can be made, and then later we just have to translate the "low Gimple" > or "RTL-Gimple" ("Rimple"?) to RTL. A format that is looser in many > ways than either RTL or Gimple. A bit like Generic in that way. Thanks for all your great comments! BR, Jeff (Jiufu) > > > Segher
