[Issue 13138] add peek/poke as compiler intrinsics

[via Digitalmars-d-bugs]

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

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
https://github.com/D-Programming-Language/druntime/pull/892
https://github.com/D-Programming-Language/dmd/pull/3773

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