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[ValueTracking] Let isGuaranteedNotToBeUndefOrPoison use canCreateUndefOrPoison

Authored by aqjune on Jul 19 2020, 5:21 PM.

Description

[ValueTracking] Let isGuaranteedNotToBeUndefOrPoison use canCreateUndefOrPoison

This patch adds support more operations.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D83926

Details