[Issue 13138] add peek/poke as compiler intrinsics

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13138

--- Comment #2 from Walter Bright <bugzilla at digitalmars.com> ---
See also:

http://wiki.dlang.org/DIP20 Volatile read/write intrinsics

http://wiki.dlang.org/DIP62 Volatile type qualifier for unoptimizable variables
in embedded programming

DIP20 is more or less what this peek/poke proposal does.

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