Add TargetInstrInfo::isSafeToMoveRegisterClassDefs. It returns true if it's safe...

[oota-llvm.git] / lib / CodeGen / TwoAddressInstructionPass.cpp

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 5cf2ffd3771bd19a9e968cf23910b18b926fb3da..794f772101e98839cedaf640e596ab9395239662 100644 (file)
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -379,7 +379,7 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
   MRI = &MF.getRegInfo();
   TII = TM.getInstrInfo();
   TRI = TM.getRegisterInfo();
-  LV = getAnalysisToUpdate<LiveVariables>();
+  LV = getAnalysisIfAvailable<LiveVariables>();
 
   bool MadeChange = false;