[OpenACC] Add firstprivate recipe helper methods to ACC dialect

Like we did for the 'private' clause, this adds an easier to use helper
function to add the 'firstprivate' clause + recipe to the Parallel and
Serial ops.

Author: erichkeane

mlir/include/mlir/Dialect/OpenACC/OpenACCOps.td

@@ -1536,6 +1536,10 @@ def OpenACC_ParallelOp : OpenACC_Op<"parallel",
     /// Adds a private clause variable to this operation, including its recipe.
     void addPrivatization(MLIRContext *, mlir::acc::PrivateOp op,
                           mlir::acc::PrivateRecipeOp recipe);
+    /// Adds a firstprivate clause variable to this operation, including its
+    /// recipe.
+    void addFirstPrivatization(MLIRContext *, mlir::acc::FirstprivateOp op,
+                               mlir::acc::FirstprivateRecipeOp recipe);
   }];
 
   let assemblyFormat = [{
@@ -1681,6 +1685,10 @@ def OpenACC_SerialOp : OpenACC_Op<"serial",
     /// Adds a private clause variable to this operation, including its recipe.
     void addPrivatization(MLIRContext *, mlir::acc::PrivateOp op,
                           mlir::acc::PrivateRecipeOp recipe);
+    /// Adds a firstprivate clause variable to this operation, including its
+    /// recipe.
+    void addFirstPrivatization(MLIRContext *, mlir::acc::FirstprivateOp op,
+                               mlir::acc::FirstprivateRecipeOp recipe);
   }];
 
   let assemblyFormat = [{

mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp

@@ -1390,6 +1390,20 @@ void acc::ParallelOp::addPrivatization(MLIRContext *context,
   setPrivatizationRecipesAttr(mlir::ArrayAttr::get(context, recipes));
 }
 
+void acc::ParallelOp::addFirstPrivatization(
+    MLIRContext *context, mlir::acc::FirstprivateOp op,
+    mlir::acc::FirstprivateRecipeOp recipe) {
+  getFirstprivateOperandsMutable().append(op.getResult());
+
+  llvm::SmallVector<mlir::Attribute> recipes;
+
+  if (getFirstprivatizationRecipesAttr())
+    llvm::copy(getFirstprivatizationRecipesAttr(), std::back_inserter(recipes));
+
+  recipes.push_back(
+      mlir::SymbolRefAttr::get(context, recipe.getSymName().str()));
+  setFirstprivatizationRecipesAttr(mlir::ArrayAttr::get(context, recipes));
+}
 static ParseResult parseNumGangs(
     mlir::OpAsmParser &parser,
     llvm::SmallVectorImpl<mlir::OpAsmParser::UnresolvedOperand> &operands,
@@ -2041,6 +2055,21 @@ void acc::SerialOp::addPrivatization(MLIRContext *context,
   setPrivatizationRecipesAttr(mlir::ArrayAttr::get(context, recipes));
 }
 
+void acc::SerialOp::addFirstPrivatization(
+    MLIRContext *context, mlir::acc::FirstprivateOp op,
+    mlir::acc::FirstprivateRecipeOp recipe) {
+  getFirstprivateOperandsMutable().append(op.getResult());
+
+  llvm::SmallVector<mlir::Attribute> recipes;
+
+  if (getFirstprivatizationRecipesAttr())
+    llvm::copy(getFirstprivatizationRecipesAttr(), std::back_inserter(recipes));
+
+  recipes.push_back(
+      mlir::SymbolRefAttr::get(context, recipe.getSymName().str()));
+  setFirstprivatizationRecipesAttr(mlir::ArrayAttr::get(context, recipes));
+}
+
 //===----------------------------------------------------------------------===//
 // KernelsOp
 //===----------------------------------------------------------------------===//