Add missing file

Author: rolfmorel

mlir/include/mlir/Target/LLVMIR/Transforms/TargetUtils.h

@@ -0,0 +1,35 @@
+//===- TargetUtils.h - Utils to obtain LLVM's TargetMachine and DataLayout ===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MLIR_TARGET_LLVMIR_TRANSFORMS_TARGETUTILS_H
+#define MLIR_TARGET_LLVMIR_TRANSFORMS_TARGETUTILS_H
+
+#include "mlir/Dialect/LLVMIR/LLVMInterfaces.h"
+#include "llvm/Support/Threading.h"
+#include "llvm/Target/TargetMachine.h"
+
+namespace mlir {
+namespace LLVM {
+namespace detail {
+/// Idempotent helper to register/initialize all backends that LLVM has been
+/// configured to support. Only runs the first time it is called.
+void initializeBackendsOnce();
+
+/// Helper to obtain the TargetMachine specified by the properties of the
+/// TargetAttrInterface-implementing attribute.
+FailureOr<std::unique_ptr<llvm::TargetMachine>>
+getTargetMachine(mlir::LLVM::TargetAttrInterface attr);
+
+/// Helper to obtain the DataLayout of the target specified by the properties of
+/// the TargetAttrInterface-implementing attribute.
+FailureOr<llvm::DataLayout> getDataLayout(mlir::LLVM::TargetAttrInterface attr);
+} // namespace detail
+} // namespace LLVM
+} // namespace mlir
+
+#endif // MLIR_TARGET_LLVMIR_TRANSFORMS_TARGETUTILS_H