Generalize the HazardRecognizer interface so that it can be used

to support MachineInstr-based scheduling in addition to
SDNode-based scheduling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62284 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/ScheduleDAG.cpp

@@ -14,6 +14,7 @@
 
 #define DEBUG_TYPE "pre-RA-sched"
 #include "llvm/CodeGen/ScheduleDAG.h"
+#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetRegisterInfo.h"
@@ -561,3 +562,5 @@ void ScheduleDAGTopologicalSort::Allocate(int n, int index) {
 ScheduleDAGTopologicalSort::ScheduleDAGTopologicalSort(
                                                      std::vector<SUnit> &sunits)
  : SUnits(sunits) {}
+
+ScheduleHazardRecognizer::~ScheduleHazardRecognizer() {}