On 12/14/18 8:23 PM, Segher Boessenkool wrote:
> On Thu, Dec 13, 2018 at 10:59:36AM -0600, Peter Bergner wrote:
>> For the alternatives
>> I'm changing, we're loading into GPR regs and these alternatives are always
>> split (split2), so these length values are never used/seen at final assembly
>> time.
>
> But some move instructions are created *after* split2.
That may be so, but I do not know how we could create a move insn using
this alternative, since rs6000_output_move_128bit() does the following
for this alternative (ie, loading a constant into a GPR):
/* Constants. */
else if (dest_regno >= 0
&& (GET_CODE (src) == CONST_INT
|| GET_CODE (src) == CONST_WIDE_INT
|| GET_CODE (src) == CONST_DOUBLE
|| GET_CODE (src) == CONST_VECTOR))
{
if (dest_gpr_p)
return "#";
This means we require the insn to eventually be split and not reach final
assembly, does it not?
Peter
