fixed code style, moved dom tree building to IR

src/CFGraph/IR_domTree.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <vector>
+#include <map>
+#include <unordered_map>
+
+#include "CFGraph.h"
+
+// Lengauer, Thomas. A fast algorithm for finding dominators in a flowgraph / Thomas Lengauer, Robert Endre Tarjan 
+// ACM Transactions on Programming Languages and Systems (TOPLAS). <20> 1979. <20> Vol. 1, no. 1. <20> Pp. 121<32>141.
+
+namespace SAPFOR {
+
+class BasicBlock;
+
+class DominatorFinder {
+private:
+    BasicBlock* entry;
+    std::vector<BasicBlock*> vertices;
+    std::unordered_map<BasicBlock*, int> dfs_num;
+    std::vector<int> parent, semi, vertex, ancestor, label;
+    std::vector<std::vector<int>> bucket;
+    int n;
+
+    void DFS(BasicBlock* v, int parent_num);
+    void Compress(int v);
+    int  Eval(int v);
+    void Link(int v, int w);
+
+public:
+    DominatorFinder(std::vector<BasicBlock*>& blocks);
+};
+
+void buildDominatorTree(std::vector<BasicBlock*>& blocks);
+}