[PATCH] D113178: [PowerPC] use right register class for input operand of XXPERMDIs

[Jinsong Ji via Phabricator via llvm-commits]

jsji added a comment.

> Of course the distinction is purely aesthetic, but I think it helps readability.

Yes, this help readability when there are large number of instructions between lfiwax and xxspltd.
But this does introduce confusion about register classes -- it is suspicious that `xxspltd` operate on `f0` instead of `vs0`.

I am OK with leaving it as it is, but I think we should at least add some comments in `XXPERMDIs` to clarify this register class change.


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  https://reviews.llvm.org/D113178/new/

https://reviews.llvm.org/D113178