[llvm] r338231 - [RegisterScavenger] Fix debug print

[Karl-Johan Karlsson via llvm-commits]

Author: karka
Date: Mon Jul 30 01:17:00 2018
New Revision: 338231

URL: http://llvm.org/viewvc/llvm-project?rev=338231&view=rev
Log:
[RegisterScavenger] Fix debug print

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

Modified: llvm/trunk/lib/CodeGen/RegisterScavenging.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegisterScavenging.cpp?rev=338231&r1=338230&r2=338231&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegisterScavenging.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegisterScavenging.cpp Mon Jul 30 01:17:00 2018
@@ -594,7 +594,8 @@ unsigned RegScavenger::scavengeRegisterB
     MachineBasicBlock::iterator ReloadAfter =
       RestoreAfter ? std::next(MBBI) : MBBI;
     MachineBasicBlock::iterator ReloadBefore = std::next(ReloadAfter);
-    LLVM_DEBUG(dbgs() << "Reload before: " << *ReloadBefore << '\n');
+    if (ReloadBefore != MBB.end())
+      LLVM_DEBUG(dbgs() << "Reload before: " << *ReloadBefore << '\n');
     ScavengedInfo &Scavenged = spill(Reg, RC, SPAdj, SpillBefore, ReloadBefore);
     Scavenged.Restore = &*std::prev(SpillBefore);
     LiveUnits.removeReg(Reg);