|Clear the result so it can be used for another round of pressure tracking. |
|void||openTop (MachineBasicBlock::const_iterator PrevTop)|
|If the current top is the previous instruction (before receding), open it. |
|void||openBottom (MachineBasicBlock::const_iterator PrevBottom)|
|If the current bottom is the previous instr (before advancing), open it. |
|Record the boundary of the region being tracked. |
RegisterPressure computed within a region of instructions delimited by TopPos and BottomPos.
Clear the result so it can be used for another round of pressure tracking.