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This patch adds a `SymbolTableAnalysis` that can be used with the analysis manager. It contains a symbol table collection. This analysis allows symbol tables to be preserved across passes so that they do not need to be recomputed. The analysis assumes it remains valid because most transformations automatically keep symbol tables up-to-date using its `insert` and `erase` methods. Reviewed By: rriddle Differential Revision: https://reviews.llvm.org/D139666
Multi-Level Intermediate Representation
See https://mlir.llvm.org/ for more information.