[PATCH] Improve alloca alignment

[Rainer Orth]

Hi Wilco,

> Eric Botcazou wrote:
>
>> The stack is aligned before the allocation but it gets misaligned during the
>> allocation because the dynamic offset is not a multiple of STACK_BOUNDARY.
>
> No, the stack never gets misaligned - my patch doesn't change that at
> all. The issue is that Sparc backend doesn't correctly set STACK_BOUNDSARY
> and neither aligns the outgoing args. Run my test which proves alloca was
> broken before my patch.

I'm currently running my SPARC bootstraps with your patch backed out so
regressions don't go overboard.  The test PASSes this way.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University