[Bug rtl-optimization/98425] Superfluous sign-extend for constrained integer

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98425

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Keywords|                            |ABI

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually this is an abi issue. The upper 32bits of the register is undefined by
the x86_64 ABI iirc. If this is true then clang has a bug.