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Commit 61a2d6bf authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] foldShuffleOfConcatUndefs - ensure shuffles of upper (undef) subvector... 

[DAG] foldShuffleOfConcatUndefs - ensure shuffles of upper (undef) subvector elements is undef (PR50609)

shuffle(concat(x,undef),concat(y,undef)) -> concat(shuffle(x,y),shuffle(x,y))

If the original shuffle references any of the upper (undef) subvector elements, ensure the split shuffle masks uses undef instead of an out-of-bounds value.

Fixes PR50609
parent dee1f0cb
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