Avoid crashing if instruction is not part of a loop.

If it is not part of a loop it is obviously invariant wrt to all loops.

llvm-svn: 58240

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/LoopVR.cpp b/llvm/lib/Analysis/LoopVR.cpp
index 7f5de259caf..d0b77b89f0a 100644
--- a/llvm/lib/Analysis/LoopVR.cpp
+++ b/llvm/lib/Analysis/LoopVR.cpp
@@ -247,12 +247,13 @@ ConstantRange LoopVR::compute(Value *V) {
     return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false);
 
   LoopInfo &LI = getAnalysis<LoopInfo>();
-  ScalarEvolution &SE = getAnalysis<ScalarEvolution>();
 
   Loop *L = LI.getLoopFor(I->getParent());
-  if (L->isLoopInvariant(I))
+  if (!L || L->isLoopInvariant(I))
     return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false);
 
+  ScalarEvolution &SE = getAnalysis<ScalarEvolution>();
+
   SCEVHandle S = SE.getSCEV(I);
   if (isa<SCEVUnknown>(S) || isa<SCEVCouldNotCompute>(S))
     return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false);