+ isScheduleHigh(false), isCloned(false),
+ isDepthCurrent(false), isHeightCurrent(false), Depth(0), Height(0),
+ CopyDstRC(NULL), CopySrcRC(NULL) {}
+
+ /// SUnit - Construct an SUnit for post-regalloc scheduling to represent
+ /// a MachineInstr.
+ SUnit(MachineInstr *instr, unsigned nodenum)
+ : Node(0), Instr(instr), OrigNode(0), NodeNum(nodenum), NodeQueueId(0),
+ Latency(0), NumPreds(0), NumSuccs(0), NumPredsLeft(0), NumSuccsLeft(0),
+ isTwoAddress(false), isCommutable(false), hasPhysRegDefs(false),
+ hasPhysRegClobbers(false),
+ isPending(false), isAvailable(false), isScheduled(false),
+ isScheduleHigh(false), isCloned(false),
+ isDepthCurrent(false), isHeightCurrent(false), Depth(0), Height(0),
+ CopyDstRC(NULL), CopySrcRC(NULL) {}
+
+ /// SUnit - Construct a placeholder SUnit.
+ SUnit()
+ : Node(0), Instr(0), OrigNode(0), NodeNum(~0u), NodeQueueId(0),
+ Latency(0), NumPreds(0), NumSuccs(0), NumPredsLeft(0), NumSuccsLeft(0),
+ isTwoAddress(false), isCommutable(false), hasPhysRegDefs(false),
+ hasPhysRegClobbers(false),
+ isPending(false), isAvailable(false), isScheduled(false),
+ isScheduleHigh(false), isCloned(false),
+ isDepthCurrent(false), isHeightCurrent(false), Depth(0), Height(0),
+ CopyDstRC(NULL), CopySrcRC(NULL) {}
+
+ /// setNode - Assign the representative SDNode for this SUnit.
+ /// This may be used during pre-regalloc scheduling.
+ void setNode(SDNode *N) {
+ assert(!Instr && "Setting SDNode of SUnit with MachineInstr!");
+ Node = N;
+ }
+
+ /// getNode - Return the representative SDNode for this SUnit.
+ /// This may be used during pre-regalloc scheduling.
+ SDNode *getNode() const {
+ assert(!Instr && "Reading SDNode of SUnit with MachineInstr!");
+ return Node;
+ }
+
+ /// setInstr - Assign the instruction for the SUnit.
+ /// This may be used during post-regalloc scheduling.
+ void setInstr(MachineInstr *MI) {
+ assert(!Node && "Setting MachineInstr of SUnit with SDNode!");
+ Instr = MI;
+ }
+
+ /// getInstr - Return the representative MachineInstr for this SUnit.
+ /// This may be used during post-regalloc scheduling.
+ MachineInstr *getInstr() const {
+ assert(!Node && "Reading MachineInstr of SUnit with SDNode!");
+ return Instr;
+ }
+
+ /// addPred - This adds the specified edge as a pred of the current node if
+ /// not already. It also adds the current node as a successor of the
+ /// specified node.
+ void addPred(const SDep &D);
+
+ /// removePred - This removes the specified edge as a pred of the current
+ /// node if it exists. It also removes the current node as a successor of
+ /// the specified node.
+ void removePred(const SDep &D);
+
+ /// getDepth - Return the depth of this node, which is the length of the
+ /// maximum path up to any node with has no predecessors.
+ unsigned getDepth() const {
+ if (!isDepthCurrent) const_cast<SUnit *>(this)->ComputeDepth();
+ return Depth;
+ }
+
+ /// getHeight - Return the height of this node, which is the length of the
+ /// maximum path down to any node with has no successors.
+ unsigned getHeight() const {
+ if (!isHeightCurrent) const_cast<SUnit *>(this)->ComputeHeight();
+ return Height;
+ }
+
+ /// setDepthToAtLeast - If NewDepth is greater than this node's depth
+ /// value, set it to be the new depth value. This also recursively
+ /// marks successor nodes dirty.
+ void setDepthToAtLeast(unsigned NewDepth);
+
+ /// setDepthToAtLeast - If NewDepth is greater than this node's depth
+ /// value, set it to be the new height value. This also recursively
+ /// marks predecessor nodes dirty.
+ void setHeightToAtLeast(unsigned NewHeight);
+
+ /// setDepthDirty - Set a flag in this node to indicate that its
+ /// stored Depth value will require recomputation the next time
+ /// getDepth() is called.
+ void setDepthDirty();
+
+ /// setHeightDirty - Set a flag in this node to indicate that its
+ /// stored Height value will require recomputation the next time
+ /// getHeight() is called.
+ void setHeightDirty();
+
+ /// isPred - Test if node N is a predecessor of this node.
+ bool isPred(SUnit *N) {
+ for (unsigned i = 0, e = (unsigned)Preds.size(); i != e; ++i)
+ if (Preds[i].getSUnit() == N)
+ return true;
+ return false;
+ }