Make the odr-use logic work correctly for constant-expressions.  PR12006.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151699 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 26a2a11..2f30e6b 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -258,7 +258,8 @@
                                                Sema::ConstantEvaluated);
 
   ExprResult LHS(ParseCastExpression(false, false, isTypeCast));
-  return ParseRHSOfBinaryExpression(LHS, prec::Conditional);
+  ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
+  return Actions.ActOnConstantExpression(Res);
 }
 
 /// ParseRHSOfBinaryExpression - Parse a binary expression that starts with