[Bug rtl-optimization/83565] [7/8 regression] RTL combine pass yields wrong rotate result

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83565

--- Comment #32 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> However I'm not sure whether exposing the distinction is really the way to
> go so I'm going to evaluate the pessimization that would be introduced on
> SPARC 64-bit by disregarding WORD_REGISTER_OPERATIONS for shift operations.

Pessimization is real under the form of redundant sign/zero-extensions, so I'm
going to test a stopgap fix instead on IA-64 and SPARC64.