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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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205
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13
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173
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14 def replaceInstruction(self, i1, i2):
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15 idx = self.instructions.index(i1)
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16 i1.parent = None
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174
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17 i1.delete()
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173
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18 i2.parent = self
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19 self.instructions[idx] = i2
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205
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20
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173
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21 def removeInstruction(self, i):
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22 i.parent = None
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23 self.instructions.remove(i)
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205
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24
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171
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25 def getInstructions(self):
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205
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26 return self.instructions
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27
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174
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28 def setInstructions(self, ins):
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29 for i in self.instructions:
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30 i.parent = None
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31 self.instructions = ins
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32 for i in self.instructions:
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33 i.parent = self
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34 Instructions = property(getInstructions, setInstructions)
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205
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35
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171
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36 def getLastIns(self):
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37 return self.instructions[-1]
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174
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38 LastInstruction = property(getLastIns)
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171
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39 @property
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40 def Empty(self):
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41 return len(self.instructions) == 0
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42 @property
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173
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43 def FirstInstruction(self):
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171
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44 return self.instructions[0]
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173
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45 FirstIns = FirstInstruction
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46 def getSuccessors(self):
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47 if not self.Empty:
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174
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48 i = self.LastInstruction
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177
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49 print(i)
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173
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50 return i.Targets
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51 return []
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52 Successors = property(getSuccessors)
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174
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53 def getPredecessors(self):
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177
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54 preds = []
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55 for bb in self.parent.BasicBlocks:
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56 if self in bb.Successors:
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57 preds.append(bb)
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58 return preds
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174
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59 Predecessors = property(getPredecessors)
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171
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60
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