Mercurial > lcfOS

comparison python/transform.py @ 177:460db5669efa

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added clean pass for IR
author Windel Bouwman
date Mon, 22 Apr 2013 23:54:54 +0200
parents 5fd02aa38b42
children 1fa3e0050b49
comparison
equal deleted inserted replaced
176:5fd02aa38b42 177:460db5669efa
75 # TODO: check volatile 75 # TODO: check volatile
76 return False 76 return False
77 otherUse = True 77 otherUse = True
78 return True 78 return True
79 79
80 class CleanPass(FunctionPass):
81 def onFunction(self, f):
82 bbs = list(f.BasicBlocks)
83 for bb in bbs:
84 # TODO: determine check for 'empty'
85 if len(bb.Instructions) == 1:
86 # This block is empty.
87 # find predecessors of this block and replace this block reference with the jumped reference.
88 ins = bb.LastInstruction
89 if type(ins) is Branch:
90 print(ins, bb.Predecessors)
91 for pred in bb.Predecessors:
92 pred.LastInstruction.changeTarget(bb, ins.target)
93 f.removeBasicBlock(bb)
94
80 class Mem2RegPromotor(FunctionPass): 95 class Mem2RegPromotor(FunctionPass):
81 def onFunction(self, f): 96 def onFunction(self, f):
82 # TODO 97 # TODO
83 print(f) 98 print(f)
84 99