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Commit 7dbfcfa7 authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] combineInsertEltToShuffle - if EXTRACT_VECTOR_ELT fails to match an... 

[DAG] combineInsertEltToShuffle - if EXTRACT_VECTOR_ELT fails to match an existing shuffle op, try to replace an undef op if there is one.

This should fix a number of shuffle regressions in D127115 where the re-ordered combines mean we fail to fold a EXTRACT_VECTOR_ELT/INSERT_VECTOR_ELT sequence into a BUILD_VECTOR if we extract from more than one vector source.
parent ae10b8a5
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