[Bug tree-optimization/104276] memset is not elimited when followed by a store loop writing to that memory location

[Darrell.Wright at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104276

--- Comment #8 from Darrell Wright <Darrell.Wright at gmail dot com> ---
What about something like a __builtin_overwrite( ptr, size_t ) that tells the
compiler that the range specified will be written.  It forms a contract to do
so with the compiler and would allow the memset to be eliminated or augmented
to part of the range