llvmir some opt

frontend/ast/exp/EqExp.java

@@ -0,0 +1,49 @@
+package frontend.ast.exp;
+
+import frontend.ast.Node;
+import frontend.ast.NodeStack;
+import frontend.ast.SyntaxType;
+import frontend.lexer.TokenStream;
+import frontend.lexer.TokenType;
+import frontend.ast.token.TokenNode;
+import error.Errors;
+
+public class EqExp extends Node {
+    public EqExp(TokenStream ts) {
+        super(SyntaxType.EQ_EXP, ts);
+    }
+
+    public void parse(Errors errors) {
+        NodeStack stack = new NodeStack();
+        while (true) {
+            RelExp relexp = new RelExp(this.ts);
+            relexp.parse(errors);
+            stack.push(relexp);
+            if (isEqOp()) {
+                stack.push(new TokenNode(ts)); // eqop
+            } else {
+                break;
+            }
+        }
+        if(stack.size() == 1) {
+            this.addChild((RelExp)stack.pop());
+        } else {
+            EqExp temp = this;
+            while (stack.size() > 1) {
+                EqExp eep = new EqExp(this.ts);
+                RelExp relexp = (RelExp)stack.pop();
+                TokenNode eqop = (TokenNode)stack.pop();
+                temp.addChild(eep);
+                temp.addChild(eqop);
+                temp.addChild(relexp);
+                temp = eep;
+            }
+            temp.addChild((RelExp)stack.pop());
+        }
+    }
+
+    public boolean isEqOp() {
+        TokenType t = getCurrToken().getType();
+        return t == TokenType.EQL || t == TokenType.NEQ;
+    }
+}