https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89290

--- Comment #3 from UroŇ° Bizjak <ubizjak at gmail dot com> ---
This address should be valid:

(const:DI (plus:DI (unspec:DI [
                (symbol_ref:DI ("s") [flags 0x2a] <var_decl 0x7f1b48c08b40 s>)
            ] UNSPEC_NTPOFF)
        (const_int 8 [0x8])))

and there is code that allows this form in ix86_legitimate_address_p:

              /* foo@dtpoff(%rX) is ok.  */
              if (GET_CODE (disp) != CONST
                  || GET_CODE (XEXP (disp, 0)) != PLUS
                  || GET_CODE (XEXP (XEXP (disp, 0), 0)) != UNSPEC
                  || !CONST_INT_P (XEXP (XEXP (disp, 0), 1))
                  || (XINT (XEXP (XEXP (disp, 0), 0), 1) != UNSPEC_DTPOFF
                      && XINT (XEXP (XEXP (disp, 0), 0), 1) != UNSPEC_NTPOFF))
                /* Non-constant pic memory reference.  */
                return false;

Jakub, can you maybe look into this issue?

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