Re: Enlarge MAX_ALLOCA?

[Dmitry Antipov]

On 06/19/2014 10:21 PM, Stefan Monnier wrote:

> > 64kB feels arbitrary.  I cannot really think of an architecture where
> > 64kB would be feasible and 128kB not.  ±32kB is a plausible offset for
> > some architectures.
>
> This has nothing to do with machine architectures.
> It's only related to the OS chosen size of the stack.

IIUC this means that if alloca is limited to < 32K, stack may be expanded
with just one instruction because increment fits into an immediate operand.
Otherwise there should be a few more load/store/add instructions.

Dmitry