Richard Smith 6cbd65d84d Add a __builtin_addressof that performs the same functionality as the built-in ...

& operator (ignoring any overloaded operator& for the type). The purpose of
this builtin is for use in std::addressof, to allow it to be made constexpr;
the existing implementation technique (reinterpret_cast to some reference type,
take address, reinterpert_cast back) does not permit this because
reinterpret_cast between reference types is not permitted in a constant
expression in C++11 onwards.

llvm-svn: 186053

2013-07-11 02:27:57 +00:00

377 B

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