Change the interface for getting a target HazardRecognizer to be more clean.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26608 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 6 insertions, 9 deletions

diff --git a/include/llvm/CodeGen/ScheduleDAG.h b/include/llvm/CodeGen/ScheduleDAG.h
index a506b82..25b62e2 100644
--- a/include/llvm/CodeGen/ScheduleDAG.h
+++ b/include/llvm/CodeGen/ScheduleDAG.h
@@ -57,10 +57,6 @@ namespace llvm {
       NoopHazard,    // This instruction can't be emitted, and needs noops.
     };
     
-    /// StartBasicBlock - This is called when a new basic block is started.
-    ///
-    virtual void StartBasicBlock() {}
-    
     /// getHazardType - Return the hazard type of emitting this node.  There are
     /// three possible results.  Either:
     ///  * NoHazard: it is legal to issue this instruction on this cycle.
@@ -410,10 +406,11 @@ namespace llvm {
                                           MachineBasicBlock *BB);
   
   /// createTDListDAGScheduler - This creates a top-down list scheduler with
-  /// the specified hazard recognizer.
+  /// the specified hazard recognizer.  This takes ownership of the hazard
+  /// recognizer and deletes it when done.
   ScheduleDAG* createTDListDAGScheduler(SelectionDAG &DAG,
                                         MachineBasicBlock *BB,
-                                        HazardRecognizer &HR);
+                                        HazardRecognizer *HR);
 }
 
 #endif
diff --git a/include/llvm/CodeGen/SelectionDAGISel.h b/include/llvm/CodeGen/SelectionDAGISel.h
index ffaa1c6..1bdf055 100644
--- a/include/llvm/CodeGen/SelectionDAGISel.h
+++ b/include/llvm/CodeGen/SelectionDAGISel.h
@@ -62,9 +62,9 @@ public:
     return true;
   }
   
-  /// GetTargetHazardRecognizer - Return the hazard recognizer to use for this
-  /// target when scheduling the DAG.
-  virtual HazardRecognizer &GetTargetHazardRecognizer();
+  /// CreateTargetHazardRecognizer - Return a newly allocated hazard recognizer
+  /// to use for this target when scheduling the DAG.
+  virtual HazardRecognizer *CreateTargetHazardRecognizer();
   
 protected:
   /// Pick a safe ordering and emit instructions for each target node in the