Simon Pilgrim 6663330bc8 [X86][AVX] canonicalizeLaneShuffleWithRepeatedOps - don't merge VPERMILPD ops with different low/high masks.
Unlike VPERMILPS, VPERMILPD can have non-repeating masks in each 128-bit subvector, we weren't accounting for this when folding vperm2f128(vpermilpd(x,c),vpermilpd(y,c)) -> vpermilpd(vperm2f128(x,y),c).

I'm intending to add support for this but wanted to get a minimal fix in first for merging into 12.xx.

Fixes PR48908
2021-01-28 12:11:31 +00:00
..
2021-01-14 12:13:48 +00:00

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