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Re: i386 stack slot optimisation

> I see what I missed the first time.  Without optimization, we have stack 
> locals, which get allocated early.  With optimization, we have 
> pseudo-regs which get spilled to the stack, which get allocated late. 
> So you are right, it is FRAME_GROWS_DOWNWARD that caused the behaviour 
> you saw.
> 
> However, I would not call this an optimization.  This is just how the 
> toolchain accidentally happens to work.

Without this emergent behaviour, stack slot assignment optimisation
would have been much more important.


-- 
Øyvind Harboe
http://www.zylin.com
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