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Commit 28a0d0e8 authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] Don't fold zext(logicalshift(zext(x),c)) -> logicalshift(zext(x),c) if the outer zext is free 

Avoid widening the shift to a bigger type if the zext would be free anyway

Pulled out of D146121
parent 1358df4d
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