[llvm] r291288 - Fix use after free

[Xin Tong via llvm-commits]

Author: trentxintong
Date: Fri Jan  6 15:49:08 2017
New Revision: 291288

URL: http://llvm.org/viewvc/llvm-project?rev=291288&view=rev
Log:
Fix use after free

Summary: Fix use after free in LoopUnswitch

Reviewers: chenli, atrick, hfinkel, mzolotukhin

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D28412

Modified:
    llvm/trunk/lib/Transforms/Scalar/LoopUnswitch.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/LoopUnswitch.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopUnswitch.cpp?rev=291288&r1=291287&r2=291288&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopUnswitch.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/LoopUnswitch.cpp Fri Jan  6 15:49:08 2017
@@ -1382,8 +1382,8 @@ void LoopUnswitch::SimplifyCode(std::vec
         Pred->getInstList().splice(BI->getIterator(), Succ->getInstList(),
                                    Succ->begin(), Succ->end());
         LPM->deleteSimpleAnalysisValue(BI, L);
-        BI->eraseFromParent();
         RemoveFromWorklist(BI, Worklist);
+        BI->eraseFromParent();
 
         // Remove Succ from the loop tree.
         LI->removeBlock(Succ);