Added a check in the preRA scheduler for potential interference on a

[oota-llvm.git] / lib / CodeGen / SelectionDAG / ScheduleDAGSDNodes.h

diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
index cc7310e4ca42cdb82616fd1447dc0d2558e5ac90..b5f68f3055cf9901ef648d8058409dfad41b5cc3 100644 (file)
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
@@ -80,6 +80,12 @@ namespace llvm {
     /// flagged together nodes with a single SUnit.
     virtual void BuildSchedGraph(AliasAnalysis *AA);
 
+    /// InitVRegCycleFlag - Set isVRegCycle if this node's single use is
+    /// CopyToReg and its only active data operands are CopyFromReg within a
+    /// single block loop.
+    ///
+    void InitVRegCycleFlag(SUnit *SU);
+
     /// InitNumRegDefsLeft - Determine the # of regs defined by this node.
     ///
     void InitNumRegDefsLeft(SUnit *SU);