Allow NULL LoopPassManager argument in UnrollLoop. PR12734.

llvm-svn: 156358
2012-05-08 02:52:09 +00:00
parent 9f5616a005
commit d29cd732d4
2 changed files with 24 additions and 18 deletions
--- a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
@@ -237,6 +237,8 @@ bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,

  // Use Scalar Evolution to compute the trip count.  This allows more
  // loops to be unrolled than relying on induction var simplification
+  if (!LPM)
+    return false;
  ScalarEvolution *SE = LPM->getAnalysisIfAvailable<ScalarEvolution>();
  if (SE == 0)
    return false;