[Bug tree-optimization/102872] If statement is always false but not figured out at gimple level

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102872

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this does not get optimized at the rtl level on all targets either, e.g.
aarch64 we get:
        tst     w0, 65535
        and     w0, w0, 65535
        ccmp    w0, 0, 4, eq
        beq     .L3
        bl      foo