[llvm-commits] CVS: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp

[Evan Cheng]

Changes in directory llvm/lib/CodeGen:

LiveIntervalAnalysis.cpp updated: 1.244 -> 1.245
---
Log message:

Only worry about intervening kill if there are more than one live ranges in the interval.

---
Diffs of the changes:  (+5 -3)

 LiveIntervalAnalysis.cpp |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)


Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.244 llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.245
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.244	Mon May 14 16:10:05 2007
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp	Mon May 14 16:23:51 2007
@@ -1073,9 +1073,11 @@
   // have clobbered values for this range.
   if (MRegisterInfo::isPhysicalRegister(repDstReg)) {
     // Unset unnecessary kills.
-    for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(),
-           E = SrcInt.end(); I != E; ++I)
-      unsetRegisterKills(I->start, I->end, repDstReg);
+    if (!DstInt.containsOneValue()) {
+      for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(),
+             E = SrcInt.end(); I != E; ++I)
+        unsetRegisterKills(I->start, I->end, repDstReg);
+    }
 
     // Update the liveintervals of sub-registers.
     for (const unsigned *AS = mri_->getSubRegisters(repDstReg); *AS; ++AS)