Juneyoung Lee 395c737d9f [SimplifyCFG] Update SimplifyBranchOnICmpChain to recognize select form of and/or ...

This patch teaches SimplifyCFG::SimplifyBranchOnICmpChain to understand select form of
(x == C1 || x == C2 || ...) / (x != C1 && x != C2 && ...) and optimize them into switch if possible.
D93065 has more context about the transition, including links to the list of optimizations being updated.

Differential Revision: https://reviews.llvm.org/D93943

2021-01-19 08:53:40 +09:00

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