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. > 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. Bernd
