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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/83073] Range for VR_VARYING | [1, 1]
Date: Mon, 19 Jul 2021 04:08:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D83073

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Take -O2 -fno-tree-fre -fno-tree-ccp -fno-tree-forwprop:
int f(int x)
{
    x =3D x|1;
    return x & 1;
}

We should be able to figure this out in evrp but don't currently.

VRP can figure it out as it does a match and simplify for the statement.=