Remove the successor probabilities normalization in tail duplication pass.

[oota-llvm.git] / lib / CodeGen / AntiDepBreaker.h

diff --git a/lib/CodeGen/AntiDepBreaker.h b/lib/CodeGen/AntiDepBreaker.h
index aaa12c3f38149b0b028e839d59d5ad7decf91f0f..9f05200dcdf34acf9ae993a10882aa5bb99cd3d9 100644 (file)
--- a/lib/CodeGen/AntiDepBreaker.h
+++ b/lib/CodeGen/AntiDepBreaker.h
@@ -25,39 +25,35 @@
 
 namespace llvm {
 
-/// AntiDepBreaker - This class works into conjunction with the
-/// post-RA scheduler to rename registers to break register
-/// anti-dependencies.
-class AntiDepBreaker {
+/// This class works in conjunction with the post-RA scheduler to rename
+/// registers to break register anti-dependencies (WAR hazards).
+class LLVM_LIBRARY_VISIBILITY AntiDepBreaker {
 public:
   typedef std::vector<std::pair<MachineInstr *, MachineInstr *> > 
     DbgValueVector;
 
   virtual ~AntiDepBreaker();
 
-  /// Start - Initialize anti-dep breaking for a new basic block.
+  /// Initialize anti-dep breaking for a new basic block.
   virtual void StartBlock(MachineBasicBlock *BB) =0;
 
-  /// BreakAntiDependencies - Identifiy anti-dependencies within a
-  /// basic-block region and break them by renaming registers. Return
-  /// the number of anti-dependencies broken.
-  ///
+  /// Identifiy anti-dependencies within a basic-block region and break them by
+  /// renaming registers. Return the number of anti-dependencies broken.
   virtual unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,
                                          MachineBasicBlock::iterator Begin,
                                          MachineBasicBlock::iterator End,
                                          unsigned InsertPosIndex,
                                          DbgValueVector &DbgValues) = 0;
   
-  /// Observe - Update liveness information to account for the current
+  /// Update liveness information to account for the current
   /// instruction, which will not be scheduled.
-  ///
   virtual void Observe(MachineInstr *MI, unsigned Count,
                        unsigned InsertPosIndex) =0;
   
-  /// Finish - Finish anti-dep breaking for a basic block.
+  /// Finish anti-dep breaking for a basic block.
   virtual void FinishBlock() =0;
 
-  /// UpdateDbgValue - Update DBG_VALUE if dependency breaker is updating
+  /// Update DBG_VALUE if dependency breaker is updating
   /// other machine instruction to use NewReg.
   void UpdateDbgValue(MachineInstr *MI, unsigned OldReg, unsigned NewReg) {
     assert (MI->isDebugValue() && "MI is not DBG_VALUE!");