[all-commits] [llvm/llvm-project] 73547b: [mlir][SymbolTable] Small optimization to walking ...

[River Riddle via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 73547b08de59d1be0e65d8dbc989e9c186295fcd
      https://github.com/llvm/llvm-project/commit/73547b08de59d1be0e65d8dbc989e9c186295fcd
  Author: River Riddle <riddleriver at gmail.com>
  Date:   2020-10-28 (Wed, 28 Oct 2020)

  Changed paths:
    M mlir/include/mlir/IR/Attributes.h
    M mlir/lib/IR/SymbolTable.cpp

  Log Message:
  -----------
  [mlir][SymbolTable] Small optimization to walking symbol references

* Check region count for unknown symbol tables first, as it is a faster check
* Add an accessor to MutableDictionaryAttr to get the internal dictionary without creating a new one if it is empty. This avoids an otherwise unnecessary lookup of an MLIRContext.