Perform tail duplication only once, after tail merging is complete.

It was too difficult to keep the heuristics for merging and duplication
consistent.

llvm-svn: 89105

1 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/BranchFolding.h b/llvm/lib/CodeGen/BranchFolding.h
index 648ec92b1eb..4920755c227 100644
--- a/llvm/lib/CodeGen/BranchFolding.h
+++ b/llvm/lib/CodeGen/BranchFolding.h
@@ -105,9 +105,8 @@ namespace llvm {
     unsigned CreateCommonTailOnlyBlock(MachineBasicBlock *&PredBB,
                                        unsigned maxCommonTailLength);
 
-    bool TailDuplicate(MachineBasicBlock *TailBB,
-                       bool PrevFallsThrough,
-                       MachineFunction &MF);
+    bool TailDuplicateBlocks(MachineFunction &MF);
+    bool TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF);
     
     bool OptimizeBranches(MachineFunction &MF);
     bool OptimizeBlock(MachineBasicBlock *MBB);