On Thu, Jan 18, 2018 at 09:10:03AM +0100, Richard Biener wrote:
> On Wed, 17 Jan 2018, Jakub Jelinek wrote:
>
> > Hi!
> >
> > PR83882 complains that PR81715 testcase fails on callee copies parameter
> > targets. The following patch ought to fix that, but I have only
> > bootstrapped/regtested it on x86_64-linux and i686-linux + on the testcase
> > with hppa.
>
> Looks reasonable.
>
> > John, do you think you could test this on hppa without the callee copies
> > default change?
> >
> > Or should we not care anymore if there aren't any similar targets left?
>
> How's that communicated to the middle-end anyways?
You mean the callee copies stuff? gimplify_parameters creates new
temporaries, assigns the parameter to them, set DECL_VALUE_EXPR on the
parameters to the temporary and at the end of function clears
DECL_VALUE_EXPR and with this patch adds a CLOBBER in a cleanup as well.
Jakub
