On Fri, Mar 16, 2012 at 2:18 PM, Bernd Schmidt <ber...@codesourcery.com> wrote: > On 03/16/2012 02:15 PM, Richard Guenther wrote: >> Hmm, ok. So to have your lea represented on RTL you cannot use >> a fancy pattern using add because it would not be an add. Hmm. >> If it merely does not affect upper bits then >> >> (set (reg:SI ptr) (add (reg:SI ptr) (reg:SI off)) >> >> might work (if Pmode aka DImode is word_mode of course - otherwise >> the upper bits would be lost ...). > > It's not. > > Really, this isn't a problem right now. I already have a patch which > makes a ptr_plus RTX code and handles it everywhere.
Fair enough. >> Maybe simply dispatching through a two-mode optab for expanding >> POINTER_PLUS_EXPRs would suit you? > > padd_optab, yes. > >> Yes, that could work. Though it might end up being incredibly ugly ;) > > In the code? Should really only change a few lines in the patch I would > have thought. I'll get back to you when I have a new version - thanks > for the tip. No, in the GIMPLE IL. Richard. > > Bernd
