[MLIR] Support `global_memref` and `get_global_memref` in standard -> LLVM…

Authored by jurahul on Nov 9 2020, 9:01 AM.


[MLIR] Support global_memref and get_global_memref in standard -> LLVM conversion.

  • Convert global_memref to LLVM::GlobalOp.
  • Convert get_global_memref to a memref descriptor with a pointer to the first element of the global stashed in it.
  • Extend unit test and a mlir-cpu-runner test to validate the generated LLVM IR.

Differential Revision: https://reviews.llvm.org/D90803