From f0db604d42595101d32240cb445272dd400a9716 Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Thu, 27 Nov 2014 15:07:54 +0800
Subject: get def use

---
 src/spiglet/spiglet2kanga/SpgExpr.java | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/spiglet/spiglet2kanga/SpgExpr.java')

diff --git a/src/spiglet/spiglet2kanga/SpgExpr.java b/src/spiglet/spiglet2kanga/SpgExpr.java
index f10c4b7..9f5fef9 100644
--- a/src/spiglet/spiglet2kanga/SpgExpr.java
+++ b/src/spiglet/spiglet2kanga/SpgExpr.java
@@ -1,10 +1,18 @@
 package spiglet.spiglet2kanga;
 
+import java.util.HashSet;
 import java.util.Vector;
 
 public class SpgExpr extends SpgSym {
 	public enum ExpType { CALL, ALLOC, BinOp, Simple };
 	
+	/* 
+	 * CALL Simp (Tmp Tmp ...)
+	 * HALLOCATE Simp
+	 * BinOP Tmp Simp
+	 * Simp := Tmp | Int | Label
+	 */
+	
 	public ExpType type;
 	public String op;
 	public SpgTemp oprand;
@@ -44,4 +52,26 @@ public class SpgExpr extends SpgSym {
 		
 		}
 	}
+	
+	public HashSet<SpgTemp> getTmpUsed() {
+		HashSet<SpgTemp> s = new HashSet<SpgTemp>();
+		switch (type) {
+		case ALLOC:
+			return se.getTmpUsed();
+		case BinOp:
+			s.add(oprand);
+			s.addAll(se.getTmpUsed());
+			return s;
+		case CALL:
+			s.addAll(se.getTmpUsed());
+			s.addAll(callParams);
+			return s;
+		case Simple:
+			System.err.println("Should not be here...");
+			return ((SpgSimpExpr)this).getTmpUsed();
+		default:
+			return null;
+		
+		}
+	}
 }
-- 
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