https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92086

--- Comment #4 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> I dont see this helping code in real life programs.  Can you explain where
> you think this could be used?

The thread start routine wrapper in glibc.  On x86-64, we could save two words
on every thread's stack.

For the main thread, we currently use an assembler helper to get a similar
effect (although the helper performs additional stack adjustment, too).

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