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Commit 6663330b authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX] canonicalizeLaneShuffleWithRepeatedOps - don't merge VPERMILPD ops... 

[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
parent da8845fc
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