Nikita Popov 91836fd7f3 [LVI][CVP] Handle (x | y) < C style conditions ...

InstCombine may convert conditions like (x < C) && (y < C) into
(x | y) < C (for some C). This patch teaches LVI to recognize that
in this case, it can infer either x < C or y < C along the edge.

This fixes the issue reported at
https://github.com/rust-lang/rust/issues/73827.

Differential Revision: https://reviews.llvm.org/D82715

2020-07-01 20:43:24 +02:00

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