Patch to check for integer overflow. It has been
commented on and approved by Richard Smith.

llvm-svn: 173377
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index ca9610b..538434d 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -7045,7 +7045,9 @@
   //   struct T { S a, b; } t = { Temp(), Temp() }
   //
   // we should destroy the first Temp before constructing the second.
-  ExprResult Result = ActOnFinishFullExpr(Init, VDecl->getLocation());
+  ExprResult Result = ActOnFinishFullExpr(Init, VDecl->getLocation(),
+                                          false,
+                                          VDecl->isConstexpr());
   if (Result.isInvalid()) {
     VDecl->setInvalidDecl();
     return;