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171
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1
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2 class BasicBlock:
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174
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3 """ Uninterrupted sequence of instructions. """
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171
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4 def __init__(self, name):
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5 self.name = name
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6 self.instructions = []
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7 def __repr__(self):
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173
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8 return 'BasicBlock {0}'.format(self.name)
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9 def addInstruction(self, i):
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10 i.parent = self
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171
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11 self.instructions.append(i)
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173
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12 addIns = addInstruction
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13 def replaceInstruction(self, i1, i2):
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14 idx = self.instructions.index(i1)
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15 i1.parent = None
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174
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16 i1.delete()
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173
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17 i2.parent = self
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18 self.instructions[idx] = i2
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19 def removeInstruction(self, i):
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20 i.parent = None
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21 self.instructions.remove(i)
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171
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22 def getInstructions(self):
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23 return self.instructions
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174
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24 def setInstructions(self, ins):
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25 for i in self.instructions:
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26 i.parent = None
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27 self.instructions = ins
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28 for i in self.instructions:
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29 i.parent = self
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30 Instructions = property(getInstructions, setInstructions)
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171
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31 def getLastIns(self):
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32 return self.instructions[-1]
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174
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33 LastInstruction = property(getLastIns)
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171
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34 @property
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35 def Empty(self):
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36 return len(self.instructions) == 0
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37 @property
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173
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38 def FirstInstruction(self):
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171
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39 return self.instructions[0]
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173
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40 FirstIns = FirstInstruction
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41 def getSuccessors(self):
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42 if not self.Empty:
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174
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43 i = self.LastInstruction
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177
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44 print(i)
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173
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45 return i.Targets
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46 return []
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47 Successors = property(getSuccessors)
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174
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48 def getPredecessors(self):
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177
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49 preds = []
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50 for bb in self.parent.BasicBlocks:
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51 if self in bb.Successors:
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52 preds.append(bb)
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53 return preds
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174
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54 Predecessors = property(getPredecessors)
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171
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55
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