[llvm] r314418 - [LoopUnroll] Fix use after poison.

[Benjamin Kramer via llvm-commits]

Author: d0k
Date: Thu Sep 28 07:47:39 2017
New Revision: 314418

URL: http://llvm.org/viewvc/llvm-project?rev=314418&view=rev
Log:
[LoopUnroll] Fix use after poison.

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

Modified: llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp?rev=314418&r1=314417&r2=314418&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp Thu Sep 28 07:47:39 2017
@@ -1304,6 +1304,9 @@ PreservedAnalyses LoopUnrollPass::run(Fu
     // for unrolling is only needed to get optimization remarks emitted in
     // a forward order.
     Loop &L = *Worklist.pop_back_val();
+#ifndef NDEBUG
+    Loop *ParentL = L.getParentLoop();
+#endif
 
     // The API here is quite complex to call, but there are only two interesting
     // states we support: partial and full (or "simple") unrolling. However, to
@@ -1326,7 +1329,6 @@ PreservedAnalyses LoopUnrollPass::run(Fu
 
     // The parent must not be damaged by unrolling!
 #ifndef NDEBUG
-    Loop *ParentL = L.getParentLoop();
     if (Result != LoopUnrollResult::Unmodified && ParentL)
       ParentL->verifyLoop();
 #endif