> On May 14, 2022, at 4:04 PM, Jonas Maebe via fpc-pascal
> <fpc-pascal@lists.freepascal.org> wrote:
>
> No, because most modern OSes don't allow you to address memory below the
> stack pointer (and for the ones that do to a limited extent, the compiler
> could be using that memory already).
I thought the stack had a fixed size of memory that’s in every frame and it’s
just a matter of if it’s occupied by any local variables or not. Seems
conceptually simple to advance the pointer as if a local variable was declared
but maybe this needs to happen at compile time making alloca more of a compiler
intrinsic.
Regards,
Ryan Joseph
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