--- a/python/irmach.py	Wed Sep 04 17:35:06 2013 +0200
+++ b/python/irmach.py	Sat Sep 14 17:29:10 2013 +0200
@@ -16,10 +16,13 @@
     def __init__(self, name):
         self.name = name
         self.instructions = []
+        self.stacksize = 0
 
     def __repr__(self):
-        return 'Frame'
+        return 'Frame {}'.format(self.name)
 
+def makeIns(*args, **kwargs):
+    return AbstractInstruction(*args, **kwargs)
 
 class AbstractInstruction:
     """ 
@@ -36,6 +39,24 @@
         s = str(self.src) if self.src else ''
         d = str(self.dst) if self.dst else ''
         l = str(self.jumps) if self.jumps else ''
-        return self.assem + s + d + l
+        #return self.assem + s + d + l
+        return self.render()
+
+    def render(self):
+        """
+            Substitutes source, dst and labels in the string
+        """
+        x = self.assem
+        for i, s in enumerate(self.src):
+            p = '%s{}'.format(i)
+            x = x.replace(p, str(s))
+        for i, d in enumerate(self.dst):
+            p = '%d{}'.format(i)
+            x = x.replace(p, str(d))
+        for i, j in enumerate(self.jumps):
+            p = '%l{}'.format(i)
+            x = x.replace(p, str(j))
+        
+        return x