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Re: [RFC] PR34389 -Wconversion produces wrong warning
On Feb 16, 2008 6:31 PM, Manuel López-Ibáñez <lopezibanez@gmail.com> wrote:
> On 16/02/2008, Richard Guenther <richard.guenther@gmail.com> wrote:
> >
> > The correct fix is to not fold expressions in the C frontend before doing
> > these kinds of warnings.
> >
>
> The fold is done by the last call to "convert" in build_binary_op in
> c-typeck.c And this is not just the C front end but also C++.
>
> So I don't see how folding can be prevented here.
It was mainly a general remark that the frontends should not fold
expressions but
defer that to the middle-end (we for example can (and do) fold during
gimplification).
Richard.