https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101955

navidrahimi <navidrahimi at microsoft dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |navidrahimi at microsoft dot 
com

--- Comment #5 from navidrahimi <navidrahimi at microsoft dot com> ---
I think rather than just 

int f(int b)
{
    return (((b)<<31)>>31);
}

We should optimize long too:
int f(int b)
{
    return (((b)<<63)>>63);
}


1) https://compiler-explorer.com/z/dnrr54v4r

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