fix folding of '*doubleArray'

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59647 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index ef8e2d4..6b71d11 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -972,6 +972,9 @@
 }
 
 bool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) {
+  if (E->getOpcode() == UnaryOperator::Deref)
+    return false;
+
   if (!EvaluateFloat(E->getSubExpr(), Result, Info))
     return false;