regex direct support for sse4 intrinsics

[bearophile]

Martin Nowak:

> The following would only require a minor syntax change.
>
> auto codeaddr = &Label;
> goto codeaddr + 0x10;
>
> GotoStatement:
>     goto Identifier ;
>     goto Expression ; // NEW
>     goto default ;
>     goto case ;
>     goto case Expression ;

You also need to support &Label, that currently is "Error:
undefined identifier Label".

Bye,
bearophile