[llvm-commits] [llvm] r150914 - /llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp

[Lang Hames]

Author: lhames
Date: Sun Feb 19 00:13:56 2012
New Revision: 150914

URL: http://llvm.org/viewvc/llvm-project?rev=150914&view=rev
Log:
Simplify moveEnteringDownFrom rules.

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

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=150914&r1=150913&r2=150914&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Sun Feb 19 00:13:56 2012
@@ -1205,17 +1205,9 @@
   void moveEnteringDownFrom(SlotIndex OldIdx, IntRangePair& P) {
     LiveInterval* LI = P.first;
     LiveRange* LR = P.second;
-    bool LiveThrough = LR->end > OldIdx.getRegSlot();
-    if (LiveThrough) {
-      MachineBasicBlock* MBB = LIS.getInstructionFromIndex(NewIdx)->getParent();
-      bool LiveOut = LR->end >= LIS.getSlotIndexes()->getMBBEndIdx(MBB);
-      if (!LiveOut) {
-        moveKillFlags(LI->reg, LR->end, NewIdx);
-        LR->end = NewIdx.getRegSlot(LR->end.isEarlyClobber());
-      }
-    } else {
-      // Not live through. Easy - just update the range endpoint.
-      LR->end = NewIdx.getRegSlot(LR->end.isEarlyClobber());
+    if (NewIdx > LR->end) {
+      moveKillFlags(LI->reg, LR->end, NewIdx);
+      LR->end = NewIdx.getRegSlot();
     }
   }