[PATCH] Add some checking for cfgexpand and partitioning

[Andrew_Pinski at PlayStation dot Sony dot Com]

Hi,
  Currently we have no checking for partitioning of stack variables.  So 
currently we could end up with the case where the offset inside a parition 
is greater than the size of the partition itself.  This patch adds this 
check.  We ran into a bug (when modifing the paritioning code) where we 
would have this case, it seems better to add a check for it so it does not 
happen when we submit this enhancement.

OK? Bootstrapped and tested on powerpc64-linux-gnu with no regressions.

Thanks,
Andrew Pinski

ChangeLog:
        * cfgexpand.c (expand_stack_vars): Add checking to make sure
        that the offset of a variable is not greater than the size
        of the paritition.

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