On Mon, Dec 19, 2022 at 04:11:59PM +0800, Kewen.Lin wrote:
> In function fold_convert_const_real_from_real, when the modes of
> two types involved in fp conversion are the same, we can simply
> take it as copy, rebuild with the exactly same TREE_REAL_CST and
> the target type. It is more efficient and helps to avoid possible
> unexpected signalling bit clearing in [1].
>
> Bootstrapped and regtested on x86_64-redhat-linux, aarch64-linux-gnu
> and powerpc64{,le}-linux-gnu.
>
> Is it ok for trunk?
>
> [1] https://gcc.gnu.org/pipermail/gcc-patches/2022-December/608533.html
>
> gcc/ChangeLog:
>
> * fold-const.cc (fold_convert_const_real_from_real): Treat floating
> point conversion to a type with same mode as copy instead of normal
> convertFormat.
The patch is ok for trunk. Thanks.
Jakub
