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From: "carlos at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/96200] Implement __builtin_thread_pointer() and
 __builtin_set_thread_pointer() if TLS is supported
Date: Wed, 15 Jul 2020 19:13:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96200

--- Comment #2 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Florian Weimer from comment #1)
> __builtin_set_thread_pointer has little value from a glibc perspective
> because when used in application code, it will always result in undefined
> behavior.

Correct, but it's useful for a C library implemetnation. In glibc the aarch=
64
tls.h is made quite clean by the use of __builtin_thread_pointer and
__builtin_set_thread_pointer.=