`const` was dropped by r274958, and the lack of `const` makes GCC6
(correctly) complain.
llvm-svn: 274961
//===----------------------------------------------------------------------===//
/// The maximum number of arguments we can put into a summary.
-static unsigned MaxSupportedArgsInSummary = 50;
+LLVM_CONSTEXPR static unsigned MaxSupportedArgsInSummary = 50;
/// We use InterfaceValue to describe parameters/return value, as well as
/// potential memory locations that are pointed to by parameters/return value,