llvm-project

cbfa265e - [MLIR][LLVMIR][DLTI] Add `LLVM::TargetAttrInterface` and `#llvm.target` attr (#145899)

[MLIR][LLVMIR][DLTI] Add `LLVM::TargetAttrInterface` and `#llvm.target` attr (#145899) Adds the `#llvm.target<triple = $TRIPLE, chip = $CHIP, features = $FEATURES>` attribute and along with a `-llvm-target-to-data-layout` pass to derive a MLIR data layout from the LLVM data layout string (using the existing `DataLayoutImporter`). The attribute implements the relevant DLTI-interfaces, to expose the `triple`, `chip` (AKA `cpu`) and `features` on `#llvm.target` and the full `DataLayoutSpecInterface`. The pass combines the generated `#dlti.dl_spec` with an existing `dl_spec` in case one is already present, e.g. a `dl_spec` which is there to specify size of the `index` type. Adds a `TargetAttrInterface` which can be implemented by all attributes representing LLVM targets. Similar to the Draft PR https://github.com/llvm/llvm-project/pull/78073. RFC on which this PR is based: https://discourse.llvm.org/t/mandatory-data-layout-in-the-llvm-dialect/85875