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Simon Pilgrim 7e382b2f05 [X86][SSE] Combine unary shuffle(HORIZOP,HORIZOP) -> HORIZOP
We had previously limited the shuffle(HORIZOP,HORIZOP) combine to binary shuffles, but we can often merge unary shuffles just as well, folding in UNDEF/ZERO values into the 64-bit half lanes.

For the (P)HADD/HSUB cases this is limited to fast-horizontal cases but PACKSS/PACKUS combines under all cases.
2020-04-05 22:49:46 +01:00
2020-04-04 00:07:07 +00:00
2020-02-10 10:33:58 -08:00
2019-07-17 07:02:02 +00:00
2020-03-14 18:08:26 -07:00

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