Re: another -Wunsequenced topic
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On 9 Jul 2013, at 05:40, Tim Kientzle <tim@kientzle.com> wrote:
> However, this does have an implicit redundant store,
> so changing it to
>=20
> ptr =3D func(ptr + 1);
>=20
> is still a good idea, just not for the reason Clang was claiming.
If the compiler can tell that ptr has not escaped, then it will elide =
the redundant store (typically, it will be gone as long as ptr is a =
local and its address has not been passed out of the function), so there =
should be no change to the generated code.
However, I still agree that it is good style, because if I read the =
original code I would be left wondering what the original programmer =
expected the incremented value of ptr++ to be visible to and suspect a =
more subtle error. =20
David
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