[llvm] r175597 - Avoid recomputing an inserted instruction's SlotIndex.

[Cameron Zwarich]

Author: zwarich
Date: Wed Feb 20 00:46:32 2013
New Revision: 175597

URL: http://llvm.org/viewvc/llvm-project?rev=175597&view=rev
Log:
Avoid recomputing an inserted instruction's SlotIndex.

Modified:
    llvm/trunk/lib/CodeGen/PHIElimination.cpp

Modified: llvm/trunk/lib/CodeGen/PHIElimination.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PHIElimination.cpp?rev=175597&r1=175596&r2=175597&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PHIElimination.cpp (original)
+++ llvm/trunk/lib/CodeGen/PHIElimination.cpp Wed Feb 20 00:46:32 2013
@@ -306,10 +306,9 @@ void PHIElimination::LowerPHINode(Machin
   // Update LiveIntervals for the new copy or implicit def.
   if (LIS) {
     MachineInstr *NewInstr = prior(AfterPHIsIt);
-    LIS->InsertMachineInstrInMaps(NewInstr);
+    SlotIndex DestCopyIndex = LIS->InsertMachineInstrInMaps(NewInstr);
 
     SlotIndex MBBStartIndex = LIS->getMBBStartIdx(&MBB);
-    SlotIndex DestCopyIndex = LIS->getInstructionIndex(NewInstr);
     if (IncomingReg) {
       // Add the region from the beginning of MBB to the copy instruction to
       // IncomingReg's live interval.