// gets InSet of a BB
const ValueSet &getInSetOfBB(const BasicBlock *BB) const;
- // gets the Live var set BEFORE an instruction
+ // gets the Live var set BEFORE an instruction.
+ // if BB is specified and the live var set has not yet been computed,
+ // it will be computed on demand.
const ValueSet &getLiveVarSetBeforeMInst(const MachineInstr *MI,
- const BasicBlock *BB);
+ const BasicBlock *BB = 0);
// gets the Live var set AFTER an instruction
+ // if BB is specified and the live var set has not yet been computed,
+ // it will be computed on demand.
const ValueSet &getLiveVarSetAfterMInst(const MachineInstr *MI,
- const BasicBlock *BB);
+ const BasicBlock *BB = 0);
};
#endif