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Re: RFA: New optimization: Convert local statics into non-statics
On Mon, 21 Jul 2008, Nick Clifton wrote:
> Hi Joseph,
>
> > We also have a version of this optimization at CodeSourcery, implemented by
> > Nathan Froyd.
>
> Fascinating. Does your version cope with local statics used by recursive
> functions ? eg:
It is intended to do so by disabling the optimization in problematic such
cases (possibly over-conservatively). Nathan can confirm.
I should point out that in "x + foo (a - 1)" the order of evaluation of
"x" and "foo (a - 1)" is unspecified, although by the stage of this
optimization the particular order has been chosen (at gimplification
time).
--
Joseph S. Myers
joseph@codesourcery.com