[llvm-commits] [llvm] r97049 - /llvm/trunk/lib/Analysis/ScalarEvolution.cpp

[Dan Gohman]

Author: djg
Date: Wed Feb 24 13:31:47 2010
New Revision: 97049

URL: http://llvm.org/viewvc/llvm-project?rev=97049&view=rev
Log:
ConstantFoldInstOperands can theoretically return null if it
didn't fold anything.

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

Modified: llvm/trunk/lib/Analysis/ScalarEvolution.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ScalarEvolution.cpp?rev=97049&r1=97048&r2=97049&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ScalarEvolution.cpp (original)
+++ llvm/trunk/lib/Analysis/ScalarEvolution.cpp Wed Feb 24 13:31:47 2010
@@ -4226,14 +4226,15 @@
           }
         }
 
-        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);
       }
     }