[llvm] r303581 - [CodeGen] Fix uninitialized variables exposed by r303084

[Vitaly Buka via llvm-commits]

Author: vitalybuka
Date: Mon May 22 16:33:54 2017
New Revision: 303581

URL: http://llvm.org/viewvc/llvm-project?rev=303581&view=rev
Log:
[CodeGen] Fix uninitialized variables exposed by r303084

All other calls of analyzeBranch reset PredTBB and PredFBB, so I assume it's
expected behavior.

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

Modified: llvm/trunk/lib/CodeGen/TailDuplicator.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TailDuplicator.cpp?rev=303581&r1=303580&r2=303581&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TailDuplicator.cpp (original)
+++ llvm/trunk/lib/CodeGen/TailDuplicator.cpp Mon May 22 16:33:54 2017
@@ -749,7 +749,7 @@ bool TailDuplicator::canTailDuplicate(Ma
   if (PredBB->succ_size() > 1)
     return false;
 
-  MachineBasicBlock *PredTBB, *PredFBB;
+  MachineBasicBlock *PredTBB = nullptr, *PredFBB = nullptr;
   SmallVector<MachineOperand, 4> PredCond;
   if (TII->analyzeBranch(*PredBB, PredTBB, PredFBB, PredCond))
     return false;
@@ -832,7 +832,7 @@ bool TailDuplicator::tailDuplicate(bool
     appendCopies(PredBB, CopyInfos, Copies);
 
     // Simplify
-    MachineBasicBlock *PredTBB, *PredFBB;
+    MachineBasicBlock *PredTBB = nullptr, *PredFBB = nullptr;
     SmallVector<MachineOperand, 4> PredCond;
     TII->analyzeBranch(*PredBB, PredTBB, PredFBB, PredCond);