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Commit 3a7c82ef authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] isGuaranteedNotToBeUndefOrPoison - handle ISD::BUILD_VECTOR nodes 

If all demanded elements of the BUILD_VECTOR pass a isGuaranteedNotToBeUndefOrPoison check, then we can treat this specific demanded use of the BUILD_VECTOR as guaranteed not to be undef or poison either.

Differential Revision: https://reviews.llvm.org/D107174
parent bc2cb91a
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