[Bug target/116043] [15 regression] TLS relocation issue when building glibc with -O3 -mavx512bf16

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116043

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |15.0
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |link-failure
            Summary|[15 regression] TLS         |[15 regression] TLS
                   |relocation issue when       |relocation issue when
                   |building glibc with -O3     |building glibc with -O3
                   |-march=znver4               |-mavx512bf16
   Last reconfirmed|                            |2024-07-23
             Target|                            |x86_64-*-*

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
-mavx512bw is enough, the "bad" assembly has

        leaq    __libc_tsd_CTYPE_B@gottpoff(%rip), %rsi

the "good" has only movq with gottpoff(%rip) relocations.