[LLVMdev] Pass to compute livein info

[Bin Zeng]

Hi all,

Is there a pass that computes livein information for each 
MachineBasicBlock? I tried to find such a pass but could not find any. I 
am trying to use the livein information to get dead registers to insert 
some instructions right before code emission but the livein information 
seems to be invalidated by some pass. I might need to recompute the 
livein information before my pass. Thanks a lot.

Bin