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Juneyoung Lee authored
This adds more poison folding optimizations to InstSimplify. Since all binary operators propagate poison, these are fine. Also, the precondition of `select cond, undef, x` -> `x` is relaxed to allow the case when `x` is undef. Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D104661
5af8bacc
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