[Linaro-TCWG-CI] gcc-16-1550-g9244ea4bf556: Failure on aarch64

[Maxim Kuvyrkov]

Hi Sam,

Thanks for looking into this.

Hi Adhemerval,

Would you please look into how glibc should handle this?

Thanks!

--
Maxim Kuvyrkov
https://www.linaro.org

> On Jun 19, 2025, at 04:24, Sam James <sam@gentoo.org> wrote:
> 
> Could you file a glibc bug for this please? It needs some analysis to
> see if it's an FP or not.
> 
> There's actually a suppression for -Os already there:
> 
>                            if (elem < table_size)
>                              {
>                                /* Compare the byte sequence but only if
>                                   this is not part of a range.  */
> 
>                                /* The compiler might warn that idx may be
>                                   used uninitialized, however it will be
>                                   reached iff elem < table_size which means
>                                   that it was properly set in the loop
>                                   above.   */
>                                DIAG_PUSH_NEEDS_COMMENT;
>                                DIAG_IGNORE_Os_NEEDS_COMMENT (8, "-Wmaybe-uninitialized");
>                                if (! is_range
> 
> # if WIDE_CHAR_VERSION
>                                    && __wmemcmp (n, &wextra[1], c1) == 0
> # else
>                                    && memcmp (n, &extra[idx + 1], c1) == 0
> # endif
>                                    )
>                                  {
>                                    n += c1 - 1;
>                                    goto matched;
>                                  }
>                                DIAG_POP_NEEDS_COMMENT;
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