add a promise delcaration

Author: fabianmcg

mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "mlir/Dialect/OpenMP/OpenMPDialect.h"
+#include "mlir/Conversion/ConvertToLLVM/ToLLVMInterface.h"
 #include "mlir/Dialect/Func/IR/FuncOps.h"
 #include "mlir/Dialect/LLVMIR/LLVMTypes.h"
 #include "mlir/Dialect/OpenACCMPCommon/Interfaces/AtomicInterfaces.h"
@@ -83,6 +84,8 @@ void OpenMPDialect::initialize() {
 #include "mlir/Dialect/OpenMP/OpenMPOpsTypes.cpp.inc"
       >();
 
+  declarePromisedInterface<ConvertToLLVMPatternInterface, OpenMPDialect>();
+
   MemRefType::attachInterface<MemRefPointerLikeModel>(*getContext());
   LLVM::LLVMPointerType::attachInterface<LLVMPointerPointerLikeModel>(
       *getContext());