Christian Grössler <ch...@groessler.org> writes: >>>> It seems that gcc wants to create an instruction like "p2=add(p1,p3)". >>>> How can I tell him not to do that? >>>> I tried to fiddle with the "p_d_general_operand" predication and use a >>>> modified one for operand 2, but >>>> at the time the constraint is called, I only see pseudo registers, and >>>> don't know in which hard register >>>> they will appear at the end.
I would guess that the addition instruction is being generated by reload. Look at the RTL dumps generated by -da and see where the insn first appears. If it is being created by reload then you need to find out why. I'm not sure what to suggest beyond that because the answer is likely to be highly processor specific. Ian
