On 11/9/23 09:22, Stefan Schulze Frielinghaus wrote:
> Deal with cases where vpdi and vmr{l,h} are still applicable if the
> operands of those instructions are swapped. For example, currently for
>
> V2DI foo (V2DI x)
> {
> return (V2DI) {x[1], x[0]};
> }
>
> the assembler sequence
>
> vlgvg %r1,%v24,1
> vzero %v0
> vlvgg %v0,%r1,0
> vmrhg %v24,%v0,%v24
>
> is emitted. With this patch a single vpdi is emitted.
>
> Extensive tests are included in a subsequent patch of this series where
> more cases are covered.
>
> Bootstrapped and regtested on s390. Ok for mainline?
>
> gcc/ChangeLog:
>
> * config/s390/s390.cc (expand_perm_with_merge): Deal with cases
> where vmr{l,h} are still applicable if the operands are swapped.
> (expand_perm_with_vpdi): Likewise for vpdi.
Ok, Thanks!
Andreas
