Initialize uninitialized variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91475 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 3887e6d..6c8e091 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -1222,7 +1222,7 @@
         // Analyze the branch at the end of the pred.
         MachineBasicBlock *PredBB = *PI;
         MachineFunction::iterator PredFallthrough = PredBB; ++PredFallthrough;
-        MachineBasicBlock *PredTBB, *PredFBB;
+        MachineBasicBlock *PredTBB = 0, *PredFBB = 0;
         SmallVector<MachineOperand, 4> PredCond;
         if (PredBB != MBB && !PredBB->canFallThrough() &&
             !TII->AnalyzeBranch(*PredBB, PredTBB, PredFBB, PredCond, true)