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Commit 1cf6f210 authored by Craig Topper's avatar Craig Topper
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[IR] Disable select ? C : undef -> C fold in ConstantFoldSelectInstruction... 

[IR] Disable select ? C : undef -> C fold in ConstantFoldSelectInstruction unless we know C isn't poison.

This matches the recent change to InstSimplify from D83440.

Differential Revision: https://reviews.llvm.org/D83535
parent 954db63c
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