Iterative coallescing doesn't buy us anything (we get identical results on

crafty with and without it).  Removing it speeds up live intervals 6%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30010 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 15 deletions

diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h
index 6834fc272a..4420e059ea 100644
--- a/include/llvm/CodeGen/LiveIntervalAnalysis.h
+++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h
@@ -53,17 +53,6 @@ namespace llvm {
     std::vector<bool> allocatableRegs_;
 
   public:
-    struct CopyRec {
-      MachineInstr *MI;
-      unsigned SrcReg, DstReg;
-    };
-    CopyRec getCopyRec(MachineInstr *MI, unsigned SrcReg, unsigned DstReg) {
-      CopyRec R;
-      R.MI = MI;
-      R.SrcReg = SrcReg;
-      R.DstReg = DstReg;
-      return R;
-    }
     struct InstrSlots {
       enum {
         LOAD  = 0,
@@ -161,10 +150,8 @@ namespace llvm {
     /// joinIntervals - join compatible live intervals
     void joinIntervals();
 
-    /// CopyCoallesceInMBB - Coallsece copies in the specified MBB, putting
-    /// copies that cannot yet be coallesced into the "TryAgain" list.
-    void CopyCoallesceInMBB(MachineBasicBlock *MBB,
-                            std::vector<CopyRec> &TryAgain);
+    /// CopyCoallesceInMBB - Coallsece copies in the specified MBB.
+    void CopyCoallesceInMBB(MachineBasicBlock *MBB);
 
     /// JoinCopy - Attempt to join intervals corresponding to SrcReg/DstReg,
     /// which are the src/dst of the copy instruction CopyMI.  This returns true