[PATCH] CodeGen: Implement the hint value for dyn_cast as described in the Itanium C++ ABI.

[Anton Korobeynikov]

> +/// \brief Compute the src2dst_offset hint as described in Itanium C++ ABI 2.9.7
> +static CharUnits computeOffsetHint(ASTContext &Context,
> ----------------
> Sean Silva wrote:
>> is 2.9.7 a section number or a version number of the ABI?
> Section number. Do you have a suggestion how to make that more clear in the comment?
[2.9.7] ?

--
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University