On Jun 12, 2014, at 3:24 PM, Segher Boessenkool <[email protected]>
wrote:
> On Thu, Jun 05, 2014 at 10:43:25PM +0100, Richard Sandiford wrote:
>> This final patch uses a common .md file to define all standard
>> constraints except 'g'.
>
> I had a look at what targets still use "g". Note: there can be
> errors in this, it's all based on \<g[,"] :-)
>
> * frv and mcore use "g" in commented-out patterns;
> * cr16, mcore, picochip, rl78, and sh use "g" where they mean "rm"
> or "m";
> * m68k uses it (in a dbne pattern) where the C template splits
> the "r", "m", "i" cases again;
> * bfin, fr30, h8300, m68k, rs6000, and v850 use it as the second
> operand (# bytes pushed) of the call patterns; that operand is
> unused in all these cases, could just be "";
> * cris, m68k, pdp11, and vax actually use "g".
>
> So it won't be all that much work to completely get rid of "g".
> Do we want that?
Is it simply a matter of replacing “g” by “mri”? That’s what the doc suggests.
Or is there more to the story than that?
paul
