Make use of ConstantInt::isZero instead of ConstantInt::isNullValue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36261 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index 5785d09..1ca1a35 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -620,7 +620,7 @@
     if (NumGEP1Ops > MinOperands) {
       for (unsigned i = FirstConstantOper; i != MaxOperands; ++i)
         if (isa<ConstantInt>(GEP1Ops[i]) && 
-            !cast<Constant>(GEP1Ops[i])->isNullValue()) {
+            !cast<ConstantInt>(GEP1Ops[i])->isZero()) {
           // Yup, there's a constant in the tail.  Set all variables to
           // constants in the GEP instruction to make it suiteable for
           // TargetData::getIndexedOffset.