roy rosen <roy.1ro...@gmail.com> writes:
> I have already have both and it still does that.
> It seems that after we get here, nothing would stop gcc from emiting
> such an invalid insn (tem = emit_insn (gen_move_insn (out, in));). So
> I think that maybe the problem is that I got there with these in and
> out arguments.
That's correct. You need to figure out how to make that not happen.
(That was the actually the goal of my suggestion, although I didn't say
it, and I guess it was not helpful in any case.)
Ian
> 2010/6/23, Ian Lance Taylor <i...@google.com>:
>> roy rosen <roy.1ro...@gmail.com> writes:
>>
>> > In my port I get to gen_reload to the lines
>> >
>> > /* If IN is a simple operand, use gen_move_insn. */
>> > else if (OBJECT_P (in) || GET_CODE (in) == SUBREG)
>> > {
>> > static int xxx;
>> > xxx = OBJECT_P (in);
>> > tem = emit_insn (gen_move_insn (out, in));
>> > /* IN may contain a LABEL_REF, if so add a REG_LABEL_OPERAND note.
>> > */
>> > mark_jump_label (in, tem, 0);
>> > }
>> >
>> > the emit_insn which should emit a move insn gets as out a register
>> > from class D and as in the Stack pointer.
>> > In my port there is no insn which can write directly from sp to d. so
>> > the emitted insn is invalid and the compilation terminates.
>> >
>> > What might be the problem?
>> > Is it possible to arrive to this point with such arguments and later
>> > to fix it or does the problem begin earlier somewhere.
>>
>> This tends to mean that you haven't set REGISTER_MOVE_COST correctly.
>> You need to make sure that moves between register class D and the
>> stack pointer have a cost greater than 2. If you are unlucky you may
>> have to introduce a secondary reload.
>>
>> Ian
>>
