When scheduling a block in parts, keep track of the overall

instruction index across each part. Instruction indices are used
to make live range queries, and live ranges can extend beyond
scheduling region boundaries.

Refactor the ScheduleDAGSDNodes class some more so that it
doesn't have to worry about this additional information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64288 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h

@@ -35,10 +35,17 @@ namespace llvm {
   ///
   class ScheduleDAGSDNodes : public ScheduleDAG {
   public:
+    SelectionDAG *DAG;                    // DAG of the current basic block
+
     explicit ScheduleDAGSDNodes(MachineFunction &mf);
 
     virtual ~ScheduleDAGSDNodes() {}
 
+    /// Run - perform scheduling.
+    ///
+    void Run(SelectionDAG *dag, MachineBasicBlock *bb,
+             MachineBasicBlock::iterator insertPos);
+
     /// isPassiveNode - Return true if the node is a non-scheduled leaf.
     ///
     static bool isPassiveNode(SDNode *Node) {