cvs commit: fptools/ghc/includes TailCalls.h fptools/ghc/rts Schedule.c

[Simon Marlow]

> > BTW, did you try twiddling gcc's -mpreferred-stack-bound 
> option?  I recall
> > something from FreeBSD-land about having to tweak this to 
> eliminate the
> > extra stack padding instructions.
> 
> You are right, -mpreferred-stack-bound might have been a way
> to get rid of the extra stack padding.  However, AFAIK
> getting rid of the stack padding means slower code, doesn't
> it.  Maybe doesn't make that much of a difference, because
> GHC code doesn't use the system stack much, but still...

We don't move the stack ptr at all in STG code, except when pushing
arguments for C calls, so if the stack starts off on a good boundary it'll
stay that way.

Cheers,
	Simon