[llvm-commits] [llvm] r58240 - /llvm/trunk/lib/Analysis/LoopVR.cpp

[Torok Edwin]

Author: edwin
Date: Mon Oct 27 05:18:45 2008
New Revision: 58240

URL: http://llvm.org/viewvc/llvm-project?rev=58240&view=rev
Log:
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.

Modified:
    llvm/trunk/lib/Analysis/LoopVR.cpp

Modified: llvm/trunk/lib/Analysis/LoopVR.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/LoopVR.cpp?rev=58240&r1=58239&r2=58240&view=diff

==============================================================================
--- llvm/trunk/lib/Analysis/LoopVR.cpp (original)
+++ llvm/trunk/lib/Analysis/LoopVR.cpp Mon Oct 27 05:18:45 2008
@@ -247,12 +247,13 @@
     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);