1 files changed, 6 insertions, 1 deletions
diff --git a/clang/lib/Analysis/GRSimpleVals.cpp b/clang/lib/Analysis/GRSimpleVals.cpp
index 6cb714a86e1..36e7233f25f 100644
--- a/clang/lib/Analysis/GRSimpleVals.cpp
+++ b/clang/lib/Analysis/GRSimpleVals.cpp
@@ -472,11 +472,16 @@ RVal GRSimpleVals::DetermEvalBinOpNN(ValueStateManager& StateMgr,
         return UnknownVal();
         
       case nonlval::SymIntConstraintValKind: {
+        
+        // Logical not?        
+        if (!(Op == BinaryOperator::EQ && R.isZeroConstant()))
+          return UnknownVal();
+        
         const SymIntConstraint& C =
           cast<nonlval::SymIntConstraintVal>(L).getConstraint();
         
         BinaryOperator::Opcode Opc = C.getOpcode();
-
+        
         if (Opc < BinaryOperator::LT || Opc > BinaryOperator::NE)
           return UnknownVal();