Add basic support for pointer arithmetic in
SimpleSValBuilder.  This clears up some
false positives emitted by ArrayBoundCheckerV2
due to the lack of support for pointer arithmetic.

llvm-svn: 122546
diff --git a/clang/lib/StaticAnalyzer/Checkers/ExprEngine.cpp b/clang/lib/StaticAnalyzer/Checkers/ExprEngine.cpp
index 17bc339..c522e72 100644
--- a/clang/lib/StaticAnalyzer/Checkers/ExprEngine.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/ExprEngine.cpp
@@ -2950,7 +2950,7 @@
       SVal RHS;
 
       if (U->getType()->isAnyPointerType())
-        RHS = svalBuilder.makeIntValWithPtrWidth(1, false);
+        RHS = svalBuilder.makeArrayIndex(1);
       else
         RHS = svalBuilder.makeIntVal(1, U->getType());