Implement parser/IR support for CFG functions, basic blocks and return instruction.
This is pretty much minimal scaffolding for this step. Basic block arguments,
instructions, other terminators, a proper IR representation for
blocks/instructions, etc are all coming.
PiperOrigin-RevId: 201826439
diff --git a/lib/IR/Instructions.cpp b/lib/IR/Instructions.cpp
new file mode 100644
index 0000000..c123b86
--- /dev/null
+++ b/lib/IR/Instructions.cpp
@@ -0,0 +1,28 @@
+//===- Instructions.cpp - MLIR CFGFunction Instruction Classes ------------===//
+//
+// Copyright 2019 The MLIR Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// =============================================================================
+
+#include "mlir/IR/Instructions.h"
+#include "mlir/IR/BasicBlock.h"
+using namespace mlir;
+
+CFGFunction *TerminatorInst::getFunction() const {
+ return getBlock()->getFunction();
+}
+
+ReturnInst::ReturnInst(BasicBlock *block) : TerminatorInst(Kind::Return, block){
+}
+