r202778 - Implement __readeflags and __writeeflags intrinsics

[Chandler Carruth]

On Mon, Mar 3, 2014 at 7:03 PM, Alexey Bataev <a.bataev at hotmail.com> wrote:

> +  unsigned long long res = 0;


Note that this local variable can be clobbered by a user who #define's
'res' to something nasty like 'int'. I think you need this to be __res much
like you use __f for the parameter.
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