From: Dan Gohman <gohman@apple.com>
Date: Wed, 24 Feb 2010 19:31:47 +0000 (+0000)
Subject: ConstantFoldInstOperands can theoretically return null if it
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=e177c9a9bcd84ca654427b869900c858a9a48e1a;p=oota-llvm.git

ConstantFoldInstOperands can theoretically return null if it
didn't fold anything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97049 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 7fb2e5e7539..5bad4b2972e 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -4226,14 +4226,15 @@ const SCEV *ScalarEvolution::computeSCEVAtScope(const SCEV *V, const Loop *L) {
           }
         }
 
-        Constant *C;
+        Constant *C = 0;
         if (const CmpInst *CI = dyn_cast<CmpInst>(I))
           C = ConstantFoldCompareInstOperands(CI->getPredicate(),
                                               Operands[0], Operands[1], TD);
         else
           C = ConstantFoldInstOperands(I->getOpcode(), I->getType(),
                                        &Operands[0], Operands.size(), TD);
-        return getSCEV(C);
+        if (C)
+          return getSCEV(C);
       }
     }