A question regarding regalloc (probably greg?) I understand that matching constraints can constrain allocation to re-use registers, e.g. for an 'add' actually has 2 instruction operands (instead of 3). This is documented well. But what about if I do not necessarily constrain the output template, e.g. zero extend output template <myzeroextend> %1, %0. Does the register allocator by default assume the machine can have %1==%0 (e.g. use edge of %0 interferes with define edge %1)? Anything else would surprise me, just making sure?
Thanks, Hendrik
