set up structure for opt

include/opt/cfg.h

@@ -0,0 +1,31 @@
+#pragma once
+#include <deque>
+#include <list>
+#include <memory>
+#include <unordered_map>
+#include <vector>
+#include "IR/IR_basic.h"
+using CFGNodeCollection = std::list<class CFGNodeType *>;
+class CFGNodeType {
+ public:
+  std::vector<CFGNodeType *> successors, predecessors;
+  BlockItem *corresponding_block;
+  CFGNodeCollection dom;
+  CFGNodeType *idom;
+  std::vector<CFGNodeType *> successors_in_dom_tree;
+  CFGNodeCollection dom_frontier;
+};
+
+class CFGType {
+ public:
+  std::vector<std::shared_ptr<CFGNodeType>> nodes;
+  CFGNodeType *entry;
+  std::unordered_map<BlockItem *, CFGNodeType *> block_to_node;
+  std::unordered_map<std::string, BlockItem *> label_to_block;
+};
+
+CFGNodeCollection GetCFGNodeCollectionsIntersection(const CFGNodeCollection &a, const CFGNodeCollection &b);
+CFGNodeCollection GetCFGNodeCollectionsUnion(const CFGNodeCollection &a, const CFGNodeCollection &b);
+CFGNodeCollection GetCFGNodeCollectionsDifference(const CFGNodeCollection &a, const CFGNodeCollection &b);
+
+CFGType BuildCFGForFunction(const std::shared_ptr<FunctionDefItem> &func);

include/opt/mem2reg.h

@@ -0,0 +1,4 @@
+#pragma once
+#include "IR/IR_basic.h"
+
+std::shared_ptr<ModuleItem> Mem2Reg(std::shared_ptr<ModuleItem> src);

include/opt/opt.h

@@ -0,0 +1,2 @@
+#include "mem2reg.h"
+#include "cfg.h"