search for: just_a0

Hi, I have som instructions that require the operand to be placed in exactly one physical register, and thus I have introduced a Just_a0 register class. I have found that the register allocators / coalescer do not seem to care about this. In many cases they "run out of registers during register allocation". I have managed to avoid some problems, by inserting target move instructions in and out of this Just_a0 register cla...