class BasicBlock;
class MachineBasicBlock {
-public:
typedef ilist<MachineInstr> Instructions;
Instructions Insts;
MachineBasicBlock *Prev, *Next;
/// LiveIns - Keep track of the physical registers that are livein of
/// the basicblock.
std::vector<unsigned> LiveIns;
+
+ /// IsLandingPad - Indicate that this basic block is entered via an
+ /// exception handler.
+ bool IsLandingPad;
public:
MachineBasicBlock(const BasicBlock *bb = 0) : Prev(0), Next(0), BB(bb),
- Number(-1), Parent(0) {
+ Number(-1), Parent(0),
+ IsLandingPad(false) {
Insts.parent = this;
}
/// is an error to add the same register to the same set more than once.
void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); }
+ /// removeLiveIn - Remove the specified register from the live in set.
+ ///
+ void removeLiveIn(unsigned Reg);
+
// Iteration support for live in sets. These sets are kept in sorted
// order by their register number.
- typedef std::vector<unsigned>::const_iterator livein_iterator;
- livein_iterator livein_begin() const { return LiveIns.begin(); }
- livein_iterator livein_end() const { return LiveIns.end(); }
+ typedef std::vector<unsigned>::iterator livein_iterator;
+ typedef std::vector<unsigned>::const_iterator const_livein_iterator;
+ livein_iterator livein_begin() { return LiveIns.begin(); }
+ const_livein_iterator livein_begin() const { return LiveIns.begin(); }
+ livein_iterator livein_end() { return LiveIns.end(); }
+ const_livein_iterator livein_end() const { return LiveIns.end(); }
bool livein_empty() const { return LiveIns.empty(); }
+ /// isLandingPad - Returns true if the block is a landing pad. That is
+ /// this basic block is entered via an exception handler.
+ bool isLandingPad() const { return IsLandingPad; }
+
+ /// setIsLandingPad - Indicates the block is a landing pad. That is
+ /// this basic block is entered via an exception handler.
+ void setIsLandingPad() { IsLandingPad = true; }
+
// Code Layout methods.
/// moveBefore/moveAfter - move 'this' block before or after the specified